From 37ebae2cfd0c417d3ffba1bd4e094c0aae8613cf Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Wed, 27 Jan 2021 13:41:56 +0100
Subject: [PATCH 01/36] BUG: openfoam reader may fail on empty zones

- some OpenFOAM versions write an empty list as zero label only
  (in binary), so need to catch these and treat like an empty list

  1. cellLabels  List<label> 0;   // typed empty list
  2. cellLabels  0;               // untyped zero-sized list (binary)

BUG: openfoam reader fail with zones and polyhedral decomposition

- polyhedral decomposition only applies to the internal (non-zoned)
  volume mesh, but the accumulator for total number of additional
  cells was being reset in InsertCellsToGrid() instead of just in the
  caller. This meant that it would be restarted at zero whenever a
  cellZone was read: leading to a mismatch in sizes.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 59 ++++++++++++++++++++-----------
 1 file changed, 38 insertions(+), 21 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index ec1df8c0d2a..9f8d5e2e885 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -6189,8 +6189,9 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
   polyPoints->SetNumberOfIds(maxNPolyPoints);
 
   const vtkIdType nCells = (cellList == nullptr ? this->NumCells : cellList->GetNumberOfTuples());
-  int nAdditionalPoints = 0;
-  this->NumTotalAdditionalCells = 0;
+
+  // Local variable for polyhedral decomposition
+  vtkIdType nAdditionalPoints = 0;
 
   // alias
   const vtkFoamLabelListList& facePoints = *facesPoints;
@@ -6200,6 +6201,12 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
   vtkSmartPointer<vtkIdTypeArray> arrayId;
   if (cellList)
   {
+    if (additionalCells) // sanity check
+    {
+      vtkErrorMacro(<< "Decompose polyhedral is not supported on mesh subset");
+      return;
+    }
+
     // create array holding cell id only on zone mesh
     arrayId = vtkSmartPointer<vtkIdTypeArray>::New();
     arrayId->SetName("CellId");
@@ -7007,7 +7014,8 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
 
   if (this->Parent->GetDecomposePolyhedra())
   {
-    // for polyhedral decomposition
+    // For polyhedral decomposition
+    this->NumTotalAdditionalCells = 0;
     this->AdditionalCellIds = vtkIdTypeArray::New();
     this->NumAdditionalCells = vtkIntArray::New();
     this->AdditionalCellPoints = new vtkFoamLabelArrayVector;
@@ -8681,13 +8689,17 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     const vtkFoamDict& dict = zones[zonei]->Dictionary();
 
     // Look up cellLabels
-    vtkFoamEntry* labelsEntry = dict.Lookup(labelsName);
-    if (labelsEntry == nullptr)
+    vtkFoamEntry* eptr = dict.Lookup(labelsName);
+    if (eptr == nullptr)
     {
       vtkErrorMacro(<< labelsName << " not found in " << zonePrefix);
       return false;
     }
-    else if (labelsEntry->FirstValue().GetType() == vtkFoamToken::EMPTYLIST)
+    vtkFoamEntryValue& labelsEntry = eptr->FirstValue();
+
+    // Some OpenFOAM versions write an empty list as zero label only (in binary)
+    if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
+      (labelsEntry.GetType() == vtkFoamToken::LABEL && labelsEntry.ToInt() == 0))
     {
       // Allocate empty mesh if the list is empty
       vtkUnstructuredGrid* zm = vtkUnstructuredGrid::New();
@@ -8695,14 +8707,13 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
       zm->Delete();
       continue;
     }
-    else if (labelsEntry->FirstValue().GetType() != vtkFoamToken::LABELLIST)
+    else if (labelsEntry.GetType() != vtkFoamToken::LABELLIST)
     {
       vtkErrorMacro(<< labelsName << " is not a labelList");
       return false;
     }
 
-    vtkDataArray& labels = labelsEntry->LabelList();
-
+    vtkDataArray& labels = labelsEntry.LabelList();
     const vtkIdType nLabels = labels.GetNumberOfTuples();
     if (nLabels > maxLabels)
     {
@@ -8759,13 +8770,17 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
     const vtkFoamDict& dict = zones[zonei]->Dictionary();
 
     // Look up faceLabels
-    vtkFoamEntry* labelsEntry = dict.Lookup(labelsName);
-    if (labelsEntry == nullptr)
+    vtkFoamEntry* eptr = dict.Lookup(labelsName);
+    if (eptr == nullptr)
     {
       vtkErrorMacro(<< labelsName << " not found in " << zonePrefix);
       return false;
     }
-    else if (labelsEntry->FirstValue().GetType() == vtkFoamToken::EMPTYLIST)
+    vtkFoamEntryValue& labelsEntry = eptr->FirstValue();
+
+    // Some OpenFOAM versions write an empty list as zero label only (in binary)
+    if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
+      (labelsEntry.GetType() == vtkFoamToken::LABEL && labelsEntry.ToInt() == 0))
     {
       // Allocate empty mesh if the list is empty
       vtkPolyData* zm = vtkPolyData::New();
@@ -8773,14 +8788,13 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
       zm->Delete();
       continue;
     }
-    else if (labelsEntry->FirstValue().GetType() != vtkFoamToken::LABELLIST)
+    else if (labelsEntry.GetType() != vtkFoamToken::LABELLIST)
     {
       vtkErrorMacro(<< labelsName << " is not a labelList");
       return false;
     }
 
-    vtkDataArray& labels = labelsEntry->LabelList();
-
+    vtkDataArray& labels = labelsEntry.LabelList();
     const vtkIdType nLabels = labels.GetNumberOfTuples();
     if (nLabels > maxLabels)
     {
@@ -8851,13 +8865,17 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     const vtkFoamDict& dict = zones[zonei]->Dictionary();
 
     // Look up pointLabels
-    vtkFoamEntry* labelsEntry = dict.Lookup(labelsName);
-    if (labelsEntry == nullptr)
+    vtkFoamEntry* eptr = dict.Lookup(labelsName);
+    if (eptr == nullptr)
     {
       vtkErrorMacro(<< labelsName << " not found in " << zonePrefix);
       return false;
     }
-    else if (labelsEntry->FirstValue().GetType() == vtkFoamToken::EMPTYLIST)
+    vtkFoamEntryValue& labelsEntry = eptr->FirstValue();
+
+    // Some OpenFOAM versions write an empty list as zero label only (in binary)
+    if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
+      (labelsEntry.GetType() == vtkFoamToken::LABEL && labelsEntry.ToInt() == 0))
     {
       // Allocate empty mesh if the list is empty
       vtkPolyData* zm = vtkPolyData::New();
@@ -8865,14 +8883,13 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
       zm->Delete();
       continue;
     }
-    else if (labelsEntry->FirstValue().GetType() != vtkFoamToken::LABELLIST)
+    else if (labelsEntry.GetType() != vtkFoamToken::LABELLIST)
     {
       vtkErrorMacro(<< labelsName << " is not a labelList");
       return false;
     }
 
-    vtkDataArray& labels = labelsEntry->LabelList();
-
+    vtkDataArray& labels = labelsEntry.LabelList();
     const vtkIdType nLabels = labels.GetNumberOfTuples();
     if (nLabels > maxLabels)
     {
-- 
GitLab


From 11c7f275e3172b06e7553d1d11f9e6a2de31ebaf Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Wed, 27 Jan 2021 14:08:11 +0100
Subject: [PATCH 02/36] BUG: openfoam move boundary points fails

- regression slipped in with fdfd69e2bb0
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 9f8d5e2e885..2b42520d0ee 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -7572,10 +7572,12 @@ vtkPoints* vtkOpenFOAMReaderPrivate::MoveInternalMesh(
 void vtkOpenFOAMReaderPrivate::MoveBoundaryMesh(
   vtkMultiBlockDataSet* boundaryMesh, vtkFloatArray* pointArray)
 {
+  const auto& patches = this->BoundaryDict;
+
   unsigned int activeBoundaryIndex = 0;
-  for (const vtkFoamPatch& patch : this->BoundaryDict)
+  for (const vtkFoamPatch& patch : patches)
   {
-    if (!this->BoundaryDict.isActive(patch.index_))
+    if (patches.isActive(patch.index_))
     {
       vtkDataArray* bpMap = this->BoundaryPointMap->operator[](activeBoundaryIndex);
       const vtkIdType nBoundaryPoints = bpMap->GetNumberOfTuples();
-- 
GitLab


From 9d36f19ee56f0bb920072f6def5c1b19a39e7d92 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Mon, 1 Feb 2021 12:45:44 +0100
Subject: [PATCH 03/36] openfoam: support floating-point dimensions entries
 (fixes #18103)

- accept floating-point dimensions, like OpenFOAM does

- support truncated dimensions entry with the first five dimensions
  only. May be present in some user-generated files.
  OpenFOAM accepts either and so do we.

- silently ignore "human-readable" dimensions such as "[kg m^-1 s^-2]".
  They are very rarely used, so we simply ignore then (which is better
  than crashing).

STYLE: spelling of internal method
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 343 ++++++++++++++++++------------
 1 file changed, 212 insertions(+), 131 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 2b42520d0ee..b8fdd12a787 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -850,7 +850,7 @@ private:
     vtkFloatArray*, vtkFloatArray*, vtkPointSet*, vtkDataArray*, vtkTypeInt64);
 
   // Convert OpenFOAM dimension array to string
-  vtkStdString ConstructDimensions(const vtkFoamDict& dict) const;
+  std::string ConstructDimensions(const vtkFoamDict& dict) const;
 
   // read and create cell/point fields
   bool ReadFieldFile(vtkFoamIOobject& io, vtkFoamDict& dict, const vtkStdString& varName,
@@ -1238,17 +1238,30 @@ public:
   double To<double>() const;
 #endif
 
-  // workaround for SunOS-CC5.6-dbg
+  // True if token represents punctuation
+  bool IsPunctuation() const noexcept { return this->Type == PUNCTUATION; }
+
+  // True if token represents a numerical value
+  bool IsNumeric() const noexcept { return this->Type == LABEL || this->Type == SCALAR; }
+
   vtkTypeInt64 ToInt() const
   {
     assert("Label type not set!" && this->HasLabelType());
     return this->Int;
   }
 
-  // workaround for SunOS-CC5.6-dbg
+  // Mostly the same as To<float>, with additional check
   float ToFloat() const
   {
-    return this->Type == LABEL ? static_cast<float>(this->Int) : static_cast<float>(this->Double);
+    return this->Type == LABEL ? static_cast<float>(this->Int)
+                               : this->Type == SCALAR ? static_cast<float>(this->Double) : 0.0F;
+  }
+
+  // Mostly the same as To<double>, with additional check
+  double ToDouble() const
+  {
+    return this->Type == LABEL ? static_cast<double>(this->Int)
+                               : this->Type == SCALAR ? this->Double : 0.0;
   }
 
   vtkStdString ToString() const { return *this->String; }
@@ -1551,6 +1564,9 @@ public:
     INPUT_MODE_ERROR
   };
 
+  // Generic exception throwing with stack trace
+  void ThrowStackTrace(const std::string& msg);
+
 private:
   // The path to the case
   vtkStdString CasePath;
@@ -1565,11 +1581,11 @@ private:
   bool InflateNext(unsigned char* buf, size_t requestSize, vtkTypeInt64* readSize = nullptr);
   int NextTokenHead();
 
-  // hacks to keep exception throwing / recursive codes out-of-line to make
+  // Keep exception throwing / recursive codes out-of-line to make
   // putBack(), getc() and readExpecting() inline expandable
   void ThrowDuplicatedPutBackException();
   void ThrowUnexpectedEOFException();
-  void ThrowUnexpectedNondigitCharExecption(int c);
+  void ThrowUnexpectedNondigitException(int c);
   void ThrowUnexpectedTokenException(char, int c);
   int ReadNext();
 
@@ -2415,7 +2431,7 @@ vtkTypeInt64 vtkFoamFile::ReadIntValue()
     }
     else
     {
-      this->ThrowUnexpectedNondigitCharExecption(c);
+      this->ThrowUnexpectedNondigitException(c);
     }
   }
 
@@ -2475,7 +2491,7 @@ FloatType vtkFoamFile::ReadFloatValue()
 
   if (!isdigit(c) && c != '.') // Attention: isdigit() accepts EOF
   {
-    this->ThrowUnexpectedNondigitCharExecption(c);
+    this->ThrowUnexpectedNondigitException(c);
   }
 
   double num = 0;
@@ -2568,14 +2584,19 @@ FloatType vtkFoamFile::ReadFloatValue()
   return static_cast<FloatType>(negNum ? -num : num);
 }
 
+void vtkFoamFile::ThrowStackTrace(const std::string& msg)
+{
+  throw this->StackString() << msg;
+}
+
 // hacks to keep exception throwing code out-of-line to make
 // putBack() and readExpecting() inline expandable
 void vtkFoamFile::ThrowUnexpectedEOFException()
 {
-  throw this->StackString() << "Unexpected EOF";
+  this->ThrowStackTrace("Unexpected EOF");
 }
 
-void vtkFoamFile::ThrowUnexpectedNondigitCharExecption(int c)
+void vtkFoamFile::ThrowUnexpectedNondigitException(int c)
 {
   throw this->StackString() << "Expected a number, found a non-digit character "
                             << static_cast<char>(c);
@@ -2583,22 +2604,22 @@ void vtkFoamFile::ThrowUnexpectedNondigitCharExecption(int c)
 
 void vtkFoamFile::ThrowUnexpectedTokenException(char expected, int c)
 {
-  vtkFoamError sstr;
-  sstr << this->StackString() << "Expected punctuation token '" << expected << "', found ";
+  vtkFoamError err;
+  err << this->StackString() << "Expected punctuation token '" << expected << "', found ";
   if (c == EOF)
   {
-    sstr << "EOF";
+    err << "EOF";
   }
   else
   {
-    sstr << static_cast<char>(c);
+    err << static_cast<char>(c);
   }
-  throw sstr;
+  throw err;
 }
 
 void vtkFoamFile::ThrowDuplicatedPutBackException()
 {
-  throw this->StackString() << "Attempted duplicated putBack()";
+  this->ThrowStackTrace("Attempted duplicated putBack()");
 }
 
 bool vtkFoamFile::InflateNext(unsigned char* buf, size_t requestSize, vtkTypeInt64* readSize)
@@ -3179,34 +3200,68 @@ public:
     this->Superclass::ScalarListPtr->FillValue(scalarValue);
   }
 
-  // Read dimensions set (always ASCII)
-  // - the leading '[' has already been removed
+  // Read dimensions set (always ASCII). The leading '[' has already been removed before calling.
+  // - can be integer or floating point
+  // - user-generated files may have only the first five dimensions.
+  // Note
+  // - may even have "human-readable" values such as [kg m^-1 s^-2] but they are very rare
+  //   and we silently skip these
   void ReadDimensionSet(vtkFoamIOobject& io)
   {
-    assert("Label type not set!" && this->HasLabelType());
-    const int nDims = 7; // There are 7 base dimensions
-    this->Superclass::Type = LABELLIST;
-    if (this->IsLabel64())
+    const int nDimensions = 7; // There are 7 base dimensions
+    this->MakeScalarList(0.0, nDimensions);
+    vtkFloatArray& dims = *(this->Superclass::ScalarListPtr);
+
+    // Read using tokenizer to handle scalar/label, variable lengths, and ignore human-readable
+    vtkFoamToken tok;
+    char expectEnding = ']';
+    bool goodInput = true;
+
+    for (int ndims = 0; ndims < nDimensions && goodInput && expectEnding; ++ndims)
     {
-      vtkTypeInt64Array* array = vtkTypeInt64Array::New();
-      array->SetNumberOfValues(nDims);
-      for (vtkIdType i = 0; i < nDims; ++i)
+      if (!io.Read(tok))
       {
-        array->SetValue(i, vtkFoamReadValue<vtkTypeInt64>::ReadValue(io));
+        goodInput = false;
       }
-      this->Superclass::LabelListPtr = array;
-    }
-    else
-    {
-      vtkTypeInt32Array* array = vtkTypeInt32Array::New();
-      array->SetNumberOfValues(nDims);
-      for (vtkIdType i = 0; i < nDims; ++i)
+      else if (tok.IsNumeric())
       {
-        array->SetValue(i, vtkFoamReadValue<vtkTypeInt32>::ReadValue(io));
+        dims.SetValue(ndims, tok.ToFloat());
       }
-      this->Superclass::LabelListPtr = array;
+      else if (tok.IsPunctuation())
+      {
+        if (tok == expectEnding)
+        {
+          expectEnding = '\0'; // Already got the closing ']'
+        }
+        else
+        {
+          goodInput = false;
+        }
+      }
+      else
+      {
+        // Some unknown token type (eg, encountered human-readable units)
+        // - skip until ']'
+        while ((goodInput = io.Read(tok)) == true)
+        {
+          if (tok.IsPunctuation() && (tok == expectEnding))
+          {
+            expectEnding = '\0'; // Already got the closing ']'
+            break;
+          }
+        }
+        break;
+      }
+    }
+
+    if (!goodInput)
+    {
+      io.ThrowStackTrace("Unexpected input while parsing dimensions array");
+    }
+    else if (expectEnding)
+    {
+      io.ReadExpecting(expectEnding);
     }
-    io.ReadExpecting(']');
   }
 
   template <vtkFoamToken::tokenType listType, typename traitsT>
@@ -4293,21 +4348,25 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
     {
       if (currToken.GetType() == this->Superclass::SCALAR)
       {
-        // switch to scalarList
-        // LabelListPtr and ScalarListPtr are packed into a single union so
-        // we need a temporary pointer
-        vtkFloatArray* slPtr = vtkFloatArray::New();
-        vtkIdType size = this->Superclass::LabelListPtr->GetNumberOfTuples();
-        slPtr->SetNumberOfValues(size + 1);
-        for (int i = 0; i < size; i++)
-        {
-          slPtr->SetValue(
-            i, static_cast<float>(GetLabelValue(this->LabelListPtr, i, io.IsLabel64())));
-        }
-        this->LabelListPtr->Delete();
-        slPtr->SetValue(size, currToken.To<float>());
-        // copy after LabelListPtr is deleted
-        this->Superclass::ScalarListPtr = slPtr;
+        // Encountered a scalar while reading a labelList - switch representation
+        // Need intermediate pointer since LabelListPtr and ScalarListPtr are in a union
+
+        vtkDataArray* labels = this->LabelListPtr;
+        const vtkIdType currLen = labels->GetNumberOfTuples();
+        const bool use64BitLabels = ::Is64BitArray(labels); // <- Same as io.IsLabel64()
+
+        // Copy, with append
+        auto* scalars = vtkFloatArray::New();
+        scalars->SetNumberOfValues(currLen + 1);
+        for (vtkIdType i = 0; i < currLen; ++i)
+        {
+          scalars->SetValue(i, static_cast<float>(GetLabelValue(labels, i, use64BitLabels)));
+        }
+        scalars->SetValue(currLen, currToken.To<float>()); // Append value
+
+        // Replace
+        labels->Delete();
+        this->Superclass::ScalarListPtr = scalars;
         this->Superclass::Type = SCALARLIST;
       }
       else if (currToken.GetType() == this->Superclass::LABEL)
@@ -4333,7 +4392,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
     }
     else if (this->Superclass::Type == this->Superclass::SCALARLIST)
     {
-      if (currToken.Is<float>())
+      if (currToken.IsNumeric())
       {
         this->Superclass::ScalarListPtr->InsertNextValue(currToken.To<float>());
       }
@@ -7885,119 +7944,141 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry& entry, vtkIdTyp
 
 //------------------------------------------------------------------------------
 // Convert OpenFOAM dimension array to string representation
-vtkStdString vtkOpenFOAMReaderPrivate::ConstructDimensions(const vtkFoamDict& dict) const
+std::string vtkOpenFOAMReaderPrivate::ConstructDimensions(const vtkFoamDict& dict) const
 {
+  const int nDimensions = 7; // There are 7 base dimensions
+  static const char* units[7] = { "kg", "m", "s", "K", "mol", "A", "cd" };
+
   if (!this->Parent->GetAddDimensionsToArrayNames())
   {
-    return vtkStdString();
+    return std::string();
   }
 
   const vtkFoamEntry* dimEntry = dict.Lookup("dimensions");
-  if ((dimEntry == nullptr) || (dimEntry->FirstValue().GetType() != vtkFoamToken::LABELLIST))
+  if ((dimEntry == nullptr) || (dimEntry->FirstValue().GetType() != vtkFoamToken::SCALARLIST))
   {
-    return vtkStdString();
+    return std::string();
   }
 
-  const int nDims = 7; // There are 7 base dimensions
-  vtkTypeInt64 dimSet[7];
-  static const char* units[7] = { "kg", "m", "s", "K", "mol", "A", "cd" };
+  const vtkFloatArray& values = dimEntry->ScalarList();
+  const vtkIdType nValues = values.GetNumberOfTuples();
 
-  const vtkDataArray& dims = dimEntry->LabelList();
-  if (dims.GetNumberOfTuples() == nDims)
+  // Expect seven dimensions, but may have only the first five.
+  // OpenFOAM accepts both and so do we.
+  if (nValues != 5 && nValues != nDimensions)
   {
-    const bool use64BitLabels = dict.IsLabel64();
-
-    for (vtkIdType i = 0; i < nDims; ++i)
-    {
-      dimSet[i] = GetLabelValue(&dims, i, use64BitLabels);
-    }
+    return std::string();
   }
-  else
+
+  // Make a copy
+  float dims[7] = { 0 };
+
+  for (vtkIdType i = 0; i < nValues; ++i)
   {
-    return vtkStdString();
+    dims[i] = values.GetValue(i);
   }
 
-  // Stringify
-  vtkStdString dimString;
+  const auto equal = // Compare floats with rounding
+    [](const float a, const float b) { return (std::abs(a - b) < 1e-3); };
+
+  const auto integral = // Test if integral/non-integral
+    [](const float val) { return (std::abs(val - std::round(val)) < 1e-4); };
+
+  // Stringify. Use stringstream to build the string
+  std::ostringstream dimensions, denominator;
+  dimensions << " [";
+  int nPositive = 0;
+  int nNegative = 0;
+
+  // Some standard units
+  if (equal(dims[0], 1) && equal(dims[1], -1) && equal(dims[2], -2))
   {
-    std::ostringstream posDim, negDim;
-    int posSpc = 0, negSpc = 0;
+    dimensions << "Pa";
+    nPositive = 1;
+    dims[0] = dims[1] = dims[2] = 0;
+  }
+  else if (equal(dims[0], 1) && equal(dims[1], 1) && equal(dims[2], -2))
+  {
+    dimensions << "N";
+    nPositive = 1;
+    dims[0] = dims[1] = dims[2] = 0;
+  }
+  else if (equal(dims[0], 1) && equal(dims[1], 2) && equal(dims[2], -3))
+  {
+    dimensions << "W";
+    nPositive = 1;
+    dims[0] = dims[1] = dims[2] = 0;
+  }
+  // Note: cannot know if 'J' or 'N m' is the better representation, so skip that one
 
-    // Some standard units
-    if (dimSet[0] == 1 && dimSet[1] == -1 && dimSet[2] == -2)
-    {
-      posDim << "Pa";
-      posSpc = 1;
-      dimSet[0] = dimSet[1] = dimSet[2] = 0;
-    }
-    else if (dimSet[0] == 1 && dimSet[1] == 1 && dimSet[2] == -2)
-    {
-      posDim << "N";
-      posSpc = 1;
-      dimSet[0] = dimSet[1] = dimSet[2] = 0;
-    }
-    else if (dimSet[0] == 1 && dimSet[1] == 2 && dimSet[2] == -3)
-    {
-      posDim << "W";
-      posSpc = 1;
-      dimSet[0] = dimSet[1] = dimSet[2] = 0;
-    }
-    // Note: cannot know if 'J' or 'N m' is the better representation, so skip that one
+  for (int dimi = 0; dimi < nDimensions; ++dimi)
+  {
+    float expon = dims[dimi];
 
-    for (vtkIdType dimI = 0; dimI < nDims; ++dimI)
+    if (expon > 0)
     {
-      vtkTypeInt64 dimDim = dimSet[dimI];
-      if (dimDim > 0)
+      if (nPositive++)
       {
-        if (posSpc)
-        {
-          posDim << ' ';
-        }
-        posDim << units[dimI];
-        if (dimDim > 1)
-        {
-          posDim << dimDim;
-        }
-        ++posSpc;
+        dimensions << ' ';
       }
-      else if (dimDim < 0)
+      dimensions << units[dimi];
+      if (equal(expon, 1))
       {
-        if (negSpc > 0)
-        {
-          negDim << ' ';
-        }
-        negDim << units[dimI];
-        if (dimDim < -1)
-        {
-          negDim << -dimDim;
-        }
-        ++negSpc;
+        continue;
       }
+      if (!integral(expon))
+      {
+        dimensions << '^';
+      }
+      dimensions << expon;
     }
-    dimString += " [" + posDim.str();
-    if (negSpc > 0)
+    else if (expon < 0)
     {
-      if (posSpc == 0)
+      expon = -expon;
+      if (nNegative++)
       {
-        dimString += '1';
+        denominator << ' ';
       }
-      if (negSpc > 1)
+      denominator << units[dimi];
+      if (equal(expon, 1))
       {
-        dimString += "/(" + negDim.str() + ")";
+        continue;
       }
-      else
+      if (!integral(expon))
       {
-        dimString += "/" + negDim.str();
+        denominator << '^';
       }
+      denominator << expon;
+    }
+  }
+
+  // Finalize, adding denominator as required
+  if (nNegative)
+  {
+    if (nPositive == 0)
+    {
+      // No numerator
+      dimensions << '1';
     }
-    else if (posSpc == 0)
+    dimensions << '/';
+
+    if (nNegative > 1)
+    {
+      dimensions << '(' << denominator.str() << ')';
+    }
+    else
     {
-      dimString += '-';
+      dimensions << denominator.str();
     }
-    dimString += ']';
+  }
+  else if (nPositive == 0)
+  {
+    // No dimensions
+    dimensions << '-';
   }
 
-  return dimString;
+  dimensions << ']';
+  return dimensions.str();
 }
 
 //------------------------------------------------------------------------------
@@ -8056,7 +8137,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
     return;
   }
 
-  const vtkStdString dimString(this->ConstructDimensions(dict));
+  const std::string dimString(this->ConstructDimensions(dict));
 
   vtkFloatArray *acData = nullptr, *ctpData = nullptr;
 
@@ -8390,7 +8471,7 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const vtkStdString& varNa
     return;
   }
 
-  const vtkStdString dimString(this->ConstructDimensions(dict));
+  const std::string dimString(this->ConstructDimensions(dict));
 
   // AdditionalCellPoints is nullptr if creation of InternalMesh had been skipped
   if (this->AdditionalCellPoints != nullptr)
-- 
GitLab


From 713f0581aefb6e7e926afb2fe9bb98507be0dea6 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 29 Jan 2021 10:18:15 +0100
Subject: [PATCH 04/36] openfoam: style changes and minor enhancements

- use std::string for internals.
  Still has some vtkStdString usage for externally visible interfaces,
  to be updated in the future. Eliminate unneeded uses of c_str()

- adjust declaration order to permit easier use of the error class in
  more places.

- plain string matching when determining arch "label=(32|64)" and
  "scalar=(32|64)". Avoids a regex.

- use SystemTools for GetEnv, potentially aids with portability,
  allows direct use of std::string

- adjust internal class 'StackVector'.

  * Additional construct with size and other methods.
  * Relocate to file-scope for potential reuse or replacement in the
    future.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 826 ++++++++++++++++--------------
 1 file changed, 434 insertions(+), 392 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index b8fdd12a787..a9b0b306b20 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -109,7 +109,6 @@
 #include "vtkPyramid.h"
 #include "vtkQuad.h"
 #include "vtkSortDataArray.h"
-#include "vtkStdString.h"
 #include "vtkStreamingDemandDrivenPipeline.h"
 #include "vtkStringArray.h"
 #include "vtkTetra.h"
@@ -122,7 +121,6 @@
 #include "vtkUnstructuredGrid.h"
 #include "vtkVertex.h"
 #include "vtkWedge.h"
-#include <vtksys/SystemTools.hxx>
 
 #if !(defined(_WIN32) && !defined(__CYGWIN__) || defined(__LIBCATAMOUNT__))
 // for getpwnam() / getpwuid()
@@ -226,6 +224,41 @@ void AppendLabelValue(vtkDataArray* array, vtkTypeInt64 val, bool use64BitLabels
 
 } // End anonymous namespace
 
+//------------------------------------------------------------------------------
+// Forward Declarations
+
+struct vtkFoamDict;
+struct vtkFoamEntry;
+struct vtkFoamEntryValue;
+struct vtkFoamFile;
+struct vtkFoamIOobject;
+struct vtkFoamToken;
+
+//------------------------------------------------------------------------------
+// class vtkFoamError
+// for exception-carrying object or general place to collect errors
+struct vtkFoamError : public std::string
+{
+  vtkFoamError& operator<<(const std::string& str)
+  {
+    this->std::string::operator+=(str);
+    return *this;
+  }
+  vtkFoamError& operator<<(const char* str)
+  {
+    this->std::string::operator+=(str);
+    return *this;
+  }
+  template <class T>
+  vtkFoamError& operator<<(const T& val)
+  {
+    std::ostringstream os;
+    os << val;
+    this->std::string::operator+=(os.str());
+    return *this;
+  }
+};
+
 //------------------------------------------------------------------------------
 // Some storage containers
 
@@ -326,74 +359,82 @@ public:
 typedef vtkFoamDataArrayVector<vtkDataArray> vtkFoamLabelArrayVector;
 
 //------------------------------------------------------------------------------
-// struct vtkFoamLabelListList - details in the implementation class
-struct vtkFoamLabelListList
+// A std::vector-like data structure where the data
+// lies on the stack. If the requested size in the
+// resize method is larger than N, the class allocates
+// the array on the heap.
+//
+// Unlike std::vector, the array is not default initialized
+// and behaves more like std::array in that manner.
+template <typename T, size_t N = 2 * 64 / sizeof(T)>
+struct vtkFoamStackVector
 {
-  // A std::vector-like data structure where the data
-  // lies on the stack. If the requested size in the
-  // resize method is larger than N, the class allocates
-  // the array on the heap.
-  //
-  // Unlike std::vector, the array is not default initialized
-  // and behaves more like std::array in that manner.
-  template <typename T, size_t N = 2 * 64 / sizeof(T)>
-  struct StackVector
-  {
-    ~StackVector()
-    {
-      if (ptr != stck)
-      {
-        delete[] ptr;
-      }
-    }
+  typedef T value_type;
 
-    void reserve(const size_t len)
-    {
-      if (capacity_ < len)
-      {
-        capacity_ = len;
-        if (ptr != stck)
-        {
-          delete[] ptr;
-        }
-        ptr = new T[capacity_];
-      }
-    }
+  /**
+   * Default construct, zero-sized
+   */
+  vtkFoamStackVector() = default;
 
-    void resize(const size_t len)
+  /**
+   * Construct with specified length
+   */
+  explicit vtkFoamStackVector(std::size_t len) { this->resize(len); }
+
+  ~vtkFoamStackVector()
+  {
+    if (ptr != stck)
     {
-      reserve(len);
-      size_ = len;
+      delete[] ptr;
     }
+  }
 
-    size_t capacity() const noexcept { return capacity_; }
-    size_t size() const noexcept { return size_; }
+  bool empty() const noexcept { return !size_; }
+  std::size_t size() const noexcept { return size_; }
+  std::size_t capacity() const noexcept { return capacity_; }
 
-    T* begin() { return ptr; }
-    T* end() { return (ptr + size_); }
-    const T* begin() const { return ptr; }
-    const T* end() const { return (ptr + size_); }
+  T* data() noexcept { return ptr; }
+  const T* data() const noexcept { return ptr; }
 
-    const T& operator[](const size_t pos) const
-    {
-      assert(pos < size_);
-      return ptr[pos];
-    }
+  T* begin() noexcept { return ptr; }
+  T* end() noexcept { return (ptr + size_); }
+  const T* begin() const noexcept { return ptr; }
+  const T* end() const noexcept { return (ptr + size_); }
 
-    T& operator[](const size_t pos)
+  void reserve(std::size_t len)
+  {
+    if (capacity_ < len)
     {
-      assert(pos < size_);
-      return ptr[pos];
+      capacity_ = len;
+      if (ptr != stck)
+      {
+        delete[] ptr;
+      }
+      ptr = new T[capacity_];
     }
+  }
 
-  private:
-    T stck[N];
-    T* ptr = stck;
-    std::size_t capacity_ = N;
-    std::size_t size_ = 0;
-  };
+  void resize(std::size_t len)
+  {
+    reserve(len);
+    size_ = len;
+  }
+
+  T& operator[](std::size_t pos) { return ptr[pos]; }
+  const T& operator[](std::size_t pos) const { return ptr[pos]; }
+
+private:
+  T stck[N];
+  T* ptr = stck;
+  std::size_t capacity_ = N;
+  std::size_t size_ = 0;
+};
 
-  using CellType = StackVector<vtkTypeInt64>;
+//------------------------------------------------------------------------------
+// struct vtkFoamLabelListList - details in the implementation class
+struct vtkFoamLabelListList
+{
+  using CellType = vtkFoamStackVector<vtkTypeInt64>;
 
   virtual ~vtkFoamLabelListList() = default;
 
@@ -573,7 +614,7 @@ struct vtkFoamPatch
     PROCESSOR = 2    // processor
   };
 
-  vtkStdString name_;
+  std::string name_;
   vtkIdType index_;
   vtkIdType start_;
   vtkIdType size_;
@@ -595,7 +636,7 @@ struct vtkFoamBoundaryDict : public std::vector<vtkFoamPatch>
   // we need to keep the path to time directory where the current mesh
   // is read from, since boundaryDict may be accessed multiple times
   // at a timestep for patch selections
-  vtkStdString TimeDir;
+  std::string TimeDir;
 
   // Reset storage
   void clearAll()
@@ -661,20 +702,6 @@ struct vtkFoamTypes
   static dataType ToEnum(const std::string& fieldType, size_t pos = 0);
 };
 
-//------------------------------------------------------------------------------
-// Forward Declarations
-
-struct vtkFoamError;
-struct vtkFoamToken;
-struct vtkFoamFileStack;
-struct vtkFoamFile;
-struct vtkFoamIOobject;
-template <typename T>
-struct vtkFoamReadValue;
-struct vtkFoamEntryValue;
-struct vtkFoamEntry;
-struct vtkFoamDict;
-
 //------------------------------------------------------------------------------
 // class vtkOpenFOAMReaderPrivate
 // the reader core of vtkOpenFOAMReader
@@ -687,34 +714,37 @@ public:
   vtkGetMacro(TimeStep, int);
   vtkSetMacro(TimeStep, int);
 
+  void SetTimeValue(double requestedTime);
+
+  vtkStringArray* GetTimeNames() { return this->TimeNames; }
   vtkDoubleArray* GetTimeValues() { return this->TimeValues; }
+
   bool HasPolyMesh() const
   {
-    return this->PolyMeshFacesDir && this->PolyMeshFacesDir->GetNumberOfValues() > 0;
+    return this->PolyMeshFacesDir && this->PolyMeshFacesDir->GetNumberOfValues();
   }
 
-  const vtkStdString& GetRegionName() const { return this->RegionName; }
-
-  // Gather time instances information and create mesh times
-  bool MakeInformationVector(const vtkStdString& casePath, const vtkStdString& controlDictPath,
-    const vtkStdString& procName, vtkOpenFOAMReader* parent, bool requirePolyMesh = true);
+  const std::string& GetRegionName() const noexcept { return this->RegionName; }
 
-  // read mesh/fields and create dataset
+  // Read mesh/fields and create dataset
   int RequestData(vtkMultiBlockDataSet*, bool, bool, bool);
-  void SetTimeValue(double);
   int MakeMetaDataAtTimeStep(vtkStringArray*, vtkStringArray*, vtkStringArray*, bool);
 
+  // Gather time instances information and create mesh times
+  bool MakeInformationVector(const std::string& casePath, const std::string& controlDictPath,
+    const std::string& procName, vtkOpenFOAMReader* parent, bool requirePolyMesh = true);
+
   // Copy time instances information and create mesh times
-  void SetupInformation(const vtkStdString& casePath, const vtkStdString& regionName,
-    const vtkStdString& procName, vtkOpenFOAMReaderPrivate* master, bool requirePolyMesh = true);
+  void SetupInformation(const std::string& casePath, const std::string& regionName,
+    const std::string& procName, vtkOpenFOAMReaderPrivate* master, bool requirePolyMesh = true);
 
 private:
   vtkOpenFOAMReader* Parent;
 
-  // case and region
-  vtkStdString CasePath;
-  vtkStdString RegionName;
-  vtkStdString ProcessorName;
+  // Case and region
+  std::string CasePath;
+  std::string RegionName;
+  std::string ProcessorName;
 
   // time information
   vtkDoubleArray* TimeValues;
@@ -777,39 +807,41 @@ private:
   void ClearBoundaryMeshes();
   void ClearMeshes();
 
-  vtkStdString RegionPath() const
+  std::string RegionPath() const
   {
     return (this->RegionName.empty() ? "" : "/") + this->RegionName;
   }
-  vtkStdString TimePath(const int timeI) const
+  std::string RegionPrefix() const
   {
-    return this->CasePath + this->TimeNames->GetValue(timeI);
+    return this->RegionName + (this->RegionName.empty() ? "" : "/");
   }
-  vtkStdString TimeRegionPath(const int timeI) const
+  std::string TimePath(int timeIndex) const
   {
-    return this->TimePath(timeI) + this->RegionPath();
+    return this->CasePath + this->TimeNames->GetValue(timeIndex);
   }
-  vtkStdString CurrentTimePath() const { return this->TimePath(this->TimeStep); }
-  vtkStdString CurrentTimeRegionPath() const { return this->TimeRegionPath(this->TimeStep); }
-  vtkStdString CurrentTimeRegionMeshPath(vtkStringArray* dir) const
+  std::string TimeRegionPath(int timeIndex) const
   {
-    return this->CasePath + dir->GetValue(this->TimeStep) + this->RegionPath() + "/polyMesh/";
+    return this->TimePath(timeIndex) + this->RegionPath();
   }
-  vtkStdString RegionPrefix() const
+  std::string CurrentTimePath() const { return this->TimePath(this->TimeStep); }
+  std::string CurrentTimeRegionPath() const { return this->TimeRegionPath(this->TimeStep); }
+  std::string CurrentTimeRegionMeshPath(vtkStringArray* dir) const
   {
-    return this->RegionName + (this->RegionName.empty() ? "" : "/");
+    return this->CasePath + dir->GetValue(this->TimeStep) + this->RegionPath() + "/polyMesh/";
   }
 
-  // search time directories for mesh
-  void AppendMeshDirToArray(vtkStringArray*, const vtkStdString&, int);
+  // Append time directories for mesh
+  void AppendMeshDirToArray(vtkStringArray*, const std::string&, int);
+
+  // Search time directories for mesh
   void PopulatePolyMeshDirArrays();
 
   void AddFieldName(
-    const vtkStdString& fieldName, const vtkStdString& fieldType, bool isLagrangian = false);
+    const std::string& fieldName, const std::string& fieldType, bool isLagrangian = false);
   // Search a time directory for field objects
-  void GetFieldNames(const vtkStdString&, bool isLagrangian = false);
+  void GetFieldNames(const std::string&, bool isLagrangian = false);
   void SortFieldFiles(vtkStringArray* selections, vtkStringArray* files);
-  void LocateLagrangianClouds(const vtkStdString& timePath);
+  void LocateLagrangianClouds(const std::string& timePath);
 
   // List time directories according to system/controlDict
   bool ListTimeDirectoriesByControlDict(const vtkFoamDict& dict);
@@ -821,10 +853,10 @@ private:
   vtkFloatArray* ReadPointsFile();
 
   // Read polyMesh/faces (faceCompactList or faceList)
-  vtkFoamLabelListList* ReadFacesFile(const vtkStdString& meshDir);
+  vtkFoamLabelListList* ReadFacesFile(const std::string& meshDir);
 
   // Read polyMesh/{owner,neighbour} and check overall number of faces
-  vtkFoamLabelListList* ReadOwnerNeighbourFiles(const vtkStdString& meshDir);
+  vtkFoamLabelListList* ReadOwnerNeighbourFiles(const std::string& meshDir);
 
   bool CheckFaceList(const vtkFoamLabelListList& faces);
 
@@ -853,13 +885,13 @@ private:
   std::string ConstructDimensions(const vtkFoamDict& dict) const;
 
   // read and create cell/point fields
-  bool ReadFieldFile(vtkFoamIOobject& io, vtkFoamDict& dict, const vtkStdString& varName,
+  bool ReadFieldFile(vtkFoamIOobject& io, vtkFoamDict& dict, const std::string& varName,
     const vtkDataArraySelection* selection);
   vtkFloatArray* FillField(vtkFoamEntry& entry, vtkIdType nElements, const vtkFoamIOobject& io,
     vtkFoamTypes::dataType fieldDataType);
-  void GetVolFieldAtTimeStep(const vtkStdString& varName, bool isInternalField = false);
-  // void GetAreaFieldAtTimeStep(const vtkStdString& varName);
-  void GetPointFieldAtTimeStep(const vtkStdString& varName);
+  void GetVolFieldAtTimeStep(const std::string& varName, bool isInternalField = false);
+  // void GetAreaFieldAtTimeStep(const std::string& varName);
+  void GetPointFieldAtTimeStep(const std::string& varName);
 
   // Create lagrangian mesh/fields
   vtkMultiBlockDataSet* MakeLagrangianMesh();
@@ -1002,27 +1034,6 @@ vtkFoamTypes::dataType vtkFoamTypes::ToEnum(const std::string& fieldType, size_t
   return dtype;
 }
 
-//------------------------------------------------------------------------------
-// class vtkFoamError
-// class for exception-carrying object
-struct vtkFoamError : public vtkStdString
-{
-private:
-  typedef vtkStdString Superclass;
-
-public:
-  // a super-easy way to make use of operator<<()'s defined in
-  // std::ostringstream class
-  template <class T>
-  vtkFoamError& operator<<(const T& t)
-  {
-    std::ostringstream os;
-    os << t;
-    this->Superclass::operator+=(os.str());
-    return *this;
-  }
-};
-
 //------------------------------------------------------------------------------
 // class vtkFoamStreamOption
 // Some elements from Foam::IOstreamOption and from Foam::IOstream
@@ -1147,7 +1158,7 @@ protected:
     double Double;
     // Any/all pointer types
     void* AnyPointer;
-    vtkStdString* String;
+    std::string* String;
     // List types (vtkObject-derived)
     vtkObjectBase* VtkObjectPtr;
     vtkStringArray* StringListPtr;
@@ -1183,7 +1194,7 @@ protected:
         break;
       case STRING:
       case IDENTIFIER:
-        this->String = new vtkStdString(*tok.String);
+        this->String = new std::string(*tok.String);
         break;
       case UNDEFINED:
       case STRINGLIST:
@@ -1264,15 +1275,15 @@ public:
                                : this->Type == SCALAR ? this->Double : 0.0;
   }
 
-  vtkStdString ToString() const { return *this->String; }
-  vtkStdString ToIdentifier() const { return *this->String; }
+  std::string ToString() const { return *this->String; }
+  std::string ToIdentifier() const { return *this->String; }
 
   void SetBad()
   {
     this->Clear();
     this->Type = TOKEN_ERROR;
   }
-  void SetIdentifier(const vtkStdString& idString)
+  void SetIdentifier(const std::string& idString)
   {
     this->operator=(idString);
     this->Type = IDENTIFIER;
@@ -1321,13 +1332,13 @@ public:
   {
     this->Clear();
     this->Type = STRING;
-    this->String = new vtkStdString(value);
+    this->String = new std::string(value);
   }
-  void operator=(const vtkStdString& value)
+  void operator=(const std::string& value)
   {
     this->Clear();
     this->Type = STRING;
-    this->String = new vtkStdString(value);
+    this->String = new std::string(value);
   }
   vtkFoamToken& operator=(const vtkFoamToken& tok)
   {
@@ -1351,11 +1362,11 @@ public:
     assert("Label type not set!" && this->HasLabelType());
     return this->Type == LABEL && this->Int == value;
   }
-  bool operator==(const vtkStdString& value) const
+  bool operator==(const std::string& value) const
   {
     return this->Type == STRING && *this->String == value;
   }
-  bool operator!=(const vtkStdString& value) const
+  bool operator!=(const std::string& value) const
   {
     return this->Type != STRING || *this->String != value;
   }
@@ -1482,7 +1493,7 @@ struct vtkFoamFileStack
 {
 protected:
   vtkOpenFOAMReader* Reader;
-  vtkStdString FileName;
+  std::string FileName;
   FILE* File;
   bool IsCompressed;
   z_stream Z;
@@ -1538,9 +1549,9 @@ protected:
   }
 
 public:
-  const vtkStdString& GetFileName() const { return this->FileName; }
-  int GetLineNumber() const { return this->LineNumber; }
-  vtkOpenFOAMReader* GetReader() const { return this->Reader; }
+  const std::string& GetFileName() const noexcept { return this->FileName; }
+  int GetLineNumber() const noexcept { return this->LineNumber; }
+  vtkOpenFOAMReader* GetReader() const noexcept { return this->Reader; }
 };
 
 //------------------------------------------------------------------------------
@@ -1569,7 +1580,7 @@ public:
 
 private:
   // The path to the case
-  vtkStdString CasePath;
+  std::string CasePath;
 
   // The current input mode
   inputModes InputMode;
@@ -1607,19 +1618,19 @@ private:
 
   vtkFoamError StackString()
   {
-    std::ostringstream os;
+    vtkFoamError err;
     if (this->StackI > 0)
     {
-      os << "\n included";
+      err << "\n included";
 
       for (int stackI = this->StackI - 1; stackI >= 0; stackI--)
       {
-        os << " from line " << this->Stack[stackI]->GetLineNumber() << " of "
-           << this->Stack[stackI]->GetFileName() << "\n";
+        err << " from line " << this->Stack[stackI]->GetLineNumber() << " of "
+            << this->Stack[stackI]->GetFileName() << "\n";
       }
-      os << ": ";
+      err << ": ";
     }
-    return vtkFoamError() << os.str();
+    return err;
   }
 
   bool CloseIncludedFile()
@@ -1658,15 +1669,15 @@ private:
   }
 
   //! Return file name (part beyond last /)
-  vtkStdString ExtractName(const vtkStdString& path) const
+  std::string ExtractName(const std::string& path) const
   {
 #if defined(_WIN32)
-    const vtkStdString pathFindSeparator = "/\\", pathSeparator = "\\";
+    const std::string pathFindSeparator = "/\\", pathSeparator = "\\";
 #else
-    const vtkStdString pathFindSeparator = "/", pathSeparator = "/";
+    const std::string pathFindSeparator = "/", pathSeparator = "/";
 #endif
-    vtkStdString::size_type pos = path.find_last_of(pathFindSeparator);
-    if (pos == vtkStdString::npos)
+    auto pos = path.find_last_of(pathFindSeparator);
+    if (pos == std::string::npos)
     {
       // no slash
       return path;
@@ -1674,9 +1685,9 @@ private:
     else if (pos + 1 == path.size())
     {
       // final trailing slash
-      vtkStdString::size_type endPos = pos;
+      const auto endPos = pos;
       pos = path.find_last_of(pathFindSeparator, pos - 1);
-      if (pos == vtkStdString::npos)
+      if (pos == std::string::npos)
       {
         // no further slash
         return path.substr(0, endPos);
@@ -1688,20 +1699,20 @@ private:
     }
     else
     {
-      return path.substr(pos + 1, vtkStdString::npos);
+      return path.substr(pos + 1);
     }
   }
 
   //! Return directory path name (part before last /)
-  vtkStdString ExtractPath(const vtkStdString& path) const
+  std::string ExtractPath(const std::string& path) const
   {
 #if defined(_WIN32)
-    const vtkStdString pathFindSeparator = "/\\", pathSeparator = "\\";
+    const std::string pathFindSeparator = "/\\", pathSeparator = "\\";
 #else
-    const vtkStdString pathFindSeparator = "/", pathSeparator = "/";
+    const std::string pathFindSeparator = "/", pathSeparator = "/";
 #endif
-    const vtkStdString::size_type pos = path.find_last_of(pathFindSeparator);
-    return pos == vtkStdString::npos ? vtkStdString(".") + pathSeparator : path.substr(0, pos + 1);
+    const auto pos = path.find_last_of(pathFindSeparator);
+    return pos == std::string::npos ? std::string(".") + pathSeparator : path.substr(0, pos + 1);
   }
 
 public:
@@ -1710,7 +1721,7 @@ public:
   vtkFoamFile(const vtkFoamFile&) = delete;
   void operator=(const vtkFoamFile&) = delete;
 
-  vtkFoamFile(const vtkStdString& casePath, vtkOpenFOAMReader* reader)
+  vtkFoamFile(const std::string& casePath, vtkOpenFOAMReader* reader)
     : vtkFoamStreamOption(reader->GetUse64BitLabels(), reader->GetUse64BitFloats())
     , vtkFoamFileStack(reader)
     , CasePath(casePath)
@@ -1720,21 +1731,21 @@ public:
   }
   ~vtkFoamFile() { this->Close(); }
 
-  vtkStdString GetCasePath() const { return this->CasePath; }
-  vtkStdString GetFilePath() const { return this->ExtractPath(this->FileName); }
+  std::string GetCasePath() const noexcept { return this->CasePath; }
+  std::string GetFilePath() const { return this->ExtractPath(this->FileName); }
 
-  inputModes GetInputMode() const { return this->InputMode; }
+  inputModes GetInputMode() const noexcept { return this->InputMode; }
 
-  vtkStdString ExpandPath(const vtkStdString& pathIn, const vtkStdString& defaultPath)
+  std::string ExpandPath(const std::string& pathIn, const std::string& defaultPath)
   {
-    vtkStdString expandedPath;
+    std::string expandedPath;
     bool isExpanded = false, wasPathSeparator = true;
     size_t charI = 0;
     const size_t nChars = pathIn.length();
 
-    vtkStdString::size_type delim = 0;
+    std::string::size_type delim = 0;
 
-    if ('<' == pathIn[0] && (delim = pathIn.find(">/")) != vtkStdString::npos)
+    if ('<' == pathIn[0] && (delim = pathIn.find(">/")) != std::string::npos)
     {
       // Expand a leading <tag>/
       // Convenient for frequently used directories - see OpenFOAM stringOps.C
@@ -1774,7 +1785,7 @@ public:
       {
         case '$': // $-variable expansion
         {
-          vtkStdString variable;
+          std::string variable;
           while (++charI < nChars && (isalnum(pathIn[charI]) || pathIn[charI] == '_'))
           {
             variable += pathIn[charI];
@@ -1794,12 +1805,12 @@ public:
           }
           else
           {
-            const char* value = getenv(variable.c_str());
-            if (value != nullptr)
+            std::string value;
+            if (vtksys::SystemTools::GetEnv(variable, value))
             {
               expandedPath += value;
             }
-            const vtkStdString::size_type len = expandedPath.length();
+            const auto len = expandedPath.length();
             if (len > 0)
             {
               const char c2 = expandedPath[len - 1];
@@ -1817,62 +1828,76 @@ public:
           // a bit better handling of "~"
           if (wasPathSeparator)
           {
-            vtkStdString userName;
+            std::string userName;
             while (++charI < nChars && (pathIn[charI] != '/' && pathIn[charI] != '\\') &&
               pathIn[charI] != '$')
             {
               userName += pathIn[charI];
             }
+
+            std::string homeDir;
             if (userName.empty())
             {
-              const char* homePtr = getenv("HOME");
-              if (homePtr == nullptr)
+              if (!vtksys::SystemTools::GetEnv("HOME", homeDir) || homeDir.empty())
               {
 #if defined(_WIN32) && !defined(__CYGWIN__) || defined(__LIBCATAMOUNT__)
-                expandedPath = "";
+                // No fallback
+                homeDir.clear();
 #else
                 const struct passwd* pwentry = getpwuid(getuid());
                 if (pwentry == nullptr)
                 {
-                  throw this->StackString() << "Home directory path not found";
+                  this->ThrowStackTrace("Home directory path not found");
                 }
-                expandedPath = pwentry->pw_dir;
+                homeDir = pwentry->pw_dir;
 #endif
               }
+              expandedPath = homeDir;
+            }
+            else if (userName == "OpenFOAM")
+            {
+              // So far only "~/.OpenFOAM" expansion is supported
+
+              if (!vtksys::SystemTools::GetEnv("HOME", homeDir) || homeDir.empty())
+              {
+#if defined(_WIN32) && !defined(__CYGWIN__) || defined(__LIBCATAMOUNT__)
+                // No fallback
+                homeDir.clear();
+#else
+                const struct passwd* pwentry = getpwuid(getuid());
+                if (pwentry == nullptr)
+                {
+                  this->ThrowStackTrace("Home directory path not found");
+                }
+                homeDir = pwentry->pw_dir;
+#endif
+              }
+
+              if (homeDir.empty())
+              {
+                expandedPath = homeDir;
+              }
               else
               {
-                expandedPath = homePtr;
+                expandedPath = homeDir + "/.OpenFOAM";
               }
             }
             else
             {
 #if defined(_WIN32) && !defined(__CYGWIN__) || defined(__LIBCATAMOUNT__)
-              const char* homePtr = getenv("HOME");
-              expandedPath = this->ExtractPath(homePtr ? homePtr : "") + userName;
-#else
-              if (userName == "OpenFOAM")
+              if (!vtksys::SystemTools::GetEnv("HOME", homeDir))
               {
-                // so far only "~/.OpenFOAM" expansion is supported
-                const char* homePtr = getenv("HOME");
-                if (homePtr == nullptr)
-                {
-                  expandedPath = "";
-                }
-                else
-                {
-                  expandedPath = vtkStdString(homePtr) + "/.OpenFOAM";
-                }
+                // No fallback
+                homeDir.clear();
               }
-              else
+              expandedPath = this->ExtractPath(homeDir) + userName;
+#else
+              const struct passwd* pwentry = getpwnam(userName.c_str());
+              if (pwentry == nullptr)
               {
-                const struct passwd* pwentry = getpwnam(userName.c_str());
-                if (pwentry == nullptr)
-                {
-                  throw this->StackString()
-                    << "Home directory for user " << userName.c_str() << " not found";
-                }
-                expandedPath = pwentry->pw_dir;
+                this->ThrowStackTrace("No home directory for user " + userName);
               }
+              expandedPath = pwentry->pw_dir;
 #endif
             }
             wasPathSeparator = false;
@@ -1896,7 +1921,7 @@ public:
     }
   }
 
-  void IncludeFile(const vtkStdString& includedFileName, const vtkStdString& defaultPath)
+  void IncludeFile(const std::string& includedFileName, const std::string& defaultPath)
   {
     if (this->StackI >= VTK_FOAMFILE_INCLUDE_STACK_SIZE)
     {
@@ -2053,7 +2078,7 @@ public:
             ++this->Superclass::LineNumber;
             if (!wasEscape)
             {
-              throw this->StackString() << "Unescaped newline in string constant";
+              this->ThrowStackTrace("Unescaped newline in string constant");
             }
           }
           buf[charI++] = static_cast<unsigned char>(c);
@@ -2072,7 +2097,7 @@ public:
         vtkFoamToken identifierToken;
         if (!this->Read(identifierToken))
         {
-          throw this->StackString() << "Unexpected EOF reading identifier";
+          this->ThrowStackTrace("Unexpected EOF reading identifier");
         }
         if (identifierToken.GetType() != vtkFoamToken::STRING)
         {
@@ -2088,7 +2113,7 @@ public:
         // middle of a line
         if (!this->Superclass::WasNewline)
         {
-          throw this->StackString() << "Encountered #-directive in the middle of a line";
+          this->ThrowStackTrace("Encountered #-directive in the middle of a line");
         }
         this->Superclass::WasNewline = false;
 #endif
@@ -2096,14 +2121,14 @@ public:
         vtkFoamToken directiveToken;
         if (!this->Read(directiveToken))
         {
-          throw this->StackString() << "Unexpected EOF reading directive";
+          this->ThrowStackTrace("Unexpected EOF reading directive");
         }
         if (directiveToken == "include")
         {
           vtkFoamToken fileNameToken;
           if (!this->Read(fileNameToken))
           {
-            throw this->StackString() << "Unexpected EOF reading filename";
+            this->ThrowStackTrace("Unexpected EOF reading filename");
           }
           this->IncludeFile(fileNameToken.ToString(), this->ExtractPath(this->FileName));
         }
@@ -2112,11 +2137,11 @@ public:
           vtkFoamToken fileNameToken;
           if (!this->Read(fileNameToken))
           {
-            throw this->StackString() << "Unexpected EOF reading filename";
+            this->ThrowStackTrace("Unexpected EOF reading filename");
           }
 
           // special treatment since the file is allowed to be missing
-          const vtkStdString fullName =
+          const std::string fullName =
             this->ExpandPath(fileNameToken.ToString(), this->ExtractPath(this->FileName));
 
           FILE* fh = vtksys::SystemTools::Fopen(fullName, "rb");
@@ -2132,7 +2157,7 @@ public:
           vtkFoamToken modeToken;
           if (!this->Read(modeToken))
           {
-            throw this->StackString() << "Unexpected EOF reading inputMode specifier";
+            this->ThrowStackTrace("Unexpected EOF reading inputMode specifier");
           }
           if (modeToken == "merge" || modeToken == "default")
           {
@@ -2174,7 +2199,7 @@ public:
             c = this->NextTokenHead();
             if (c == EOF)
             {
-              throw this->StackString() << "Unexpected EOF while skipping over #{ directive";
+              this->ThrowStackTrace("Unexpected EOF while skipping over #{ directive");
             }
             else if (c == '#')
             {
@@ -2225,12 +2250,12 @@ public:
     }
     if (charI == MAXLEN)
     {
-      throw this->StackString() << "Exceeded maximum allowed length of " << MAXLEN << " chars";
+      throw this->StackString() << "Exceeded maximum allowed length of " << MAXLEN;
     }
     return true;
   }
 
-  void Open(const vtkStdString& fileName)
+  void Open(const std::string& fileName)
   {
     // reset line number to indicate the beginning of the file when an
     // exception is thrown
@@ -2239,13 +2264,13 @@ public:
 
     if (this->Superclass::File)
     {
-      throw this->StackString() << "File already opened within this object";
+      this->ThrowStackTrace("File already opened within this object");
     }
 
     if ((this->Superclass::File = vtksys::SystemTools::Fopen(this->Superclass::FileName, "rb")) ==
       nullptr)
     {
-      throw this->StackString() << "Can't open";
+      this->ThrowStackTrace("Cannot open file for reading");
     }
 
     unsigned char zMagic[2];
@@ -2647,7 +2672,7 @@ bool vtkFoamFile::InflateNext(unsigned char* buf, size_t requestSize, vtkTypeInt
           fread(this->Superclass::Inbuf, 1, VTK_FOAMFILE_INBUFSIZE, this->Superclass::File));
         if (ferror(this->Superclass::File))
         {
-          throw this->StackString() << "Fread failed";
+          this->ThrowStackTrace("failed in fread()");
         }
       }
       this->Superclass::ZStatus = inflate(&this->Superclass::Z, Z_NO_FLUSH);
@@ -2771,18 +2796,18 @@ struct vtkFoamIOobject : public vtkFoamFile
 private:
   typedef vtkFoamFile Superclass;
 
-  vtkStdString objectName_;
-  vtkStdString headerClassName_;
+  std::string objectName_;
+  std::string headerClassName_;
   vtkFoamError error_;
 
   // Inform IO object that lagrangian/positions has extra data (OpenFOAM v1.4 - v2.4)
-  const bool LagrangianPositionsExtraData;
+  const bool LagrangianPositionsExtraData_;
 
   // Reads OpenFOAM format/class/object information and handles "arch" information
   void ReadHeader();
 
   // Attempt to open file (or file.gz) and read header
-  bool OpenFile(const vtkStdString& file, bool fallbackGzip = false)
+  bool OpenFile(const std::string& file, bool fallbackGzip = false)
   {
     try
     {
@@ -2831,18 +2856,19 @@ public:
   void operator=(const vtkFoamIOobject&) = delete;
 
   // Construct for specified case -path
-  vtkFoamIOobject(const vtkStdString& casePath, vtkOpenFOAMReader* reader)
+  vtkFoamIOobject(const std::string& casePath, vtkOpenFOAMReader* reader)
     : vtkFoamFile(casePath, reader)
-    , LagrangianPositionsExtraData(static_cast<bool>(!reader->GetPositionsIsIn13Format()))
+    , LagrangianPositionsExtraData_(static_cast<bool>(!reader->GetPositionsIsIn13Format()))
   {
   }
+
   ~vtkFoamIOobject() { this->Close(); }
 
   // Attempt to open file (without gzip fallback) and read FoamFile header
-  bool Open(const vtkStdString& file) { return OpenFile(file); }
+  bool Open(const std::string& file) { return OpenFile(file); }
 
   // Attempt to open file (with gzip fallback) and read FoamFile header
-  bool OpenOrGzip(const vtkStdString& file) { return OpenFile(file, true); }
+  bool OpenOrGzip(const std::string& file) { return OpenFile(file, true); }
 
   void Close()
   {
@@ -2852,11 +2878,12 @@ public:
     this->error_.clear();
   }
 
-  const vtkStdString& GetClassName() const { return this->headerClassName_; }
-  const vtkStdString& GetObjectName() const { return this->objectName_; }
-  const vtkFoamError& GetError() const { return this->error_; }
+  const std::string& GetClassName() const noexcept { return this->headerClassName_; }
+  const std::string& GetObjectName() const noexcept { return this->objectName_; }
+  const vtkFoamError& GetError() const noexcept { return this->error_; }
   void SetError(const vtkFoamError& e) { this->error_ = e; }
-  bool GetLagrangianPositionsExtraData() const { return this->LagrangianPositionsExtraData; }
+  bool HasError() const noexcept { return !this->error_.empty(); }
+  bool GetLagrangianPositionsExtraData() const { return this->LagrangianPositionsExtraData_; }
 };
 
 //------------------------------------------------------------------------------
@@ -2907,7 +2934,7 @@ struct vtkFoamEntryValue : public vtkFoamToken
 private:
   typedef vtkFoamToken Superclass;
 
-  bool IsUniform;
+  bool IsUniformEntry;
   bool Managed;
   const vtkFoamEntry* UpperEntryPtr;
 
@@ -3106,7 +3133,7 @@ public:
   };
 
   vtkFoamEntryValue(const vtkFoamEntry* upperEntryPtr)
-    : IsUniform(false)
+    : IsUniformEntry(false)
     , Managed(true)
     , UpperEntryPtr(upperEntryPtr)
   {
@@ -3117,10 +3144,10 @@ public:
   void SetEmptyList()
   {
     this->Clear();
-    this->IsUniform = false;
+    this->IsUniformEntry = false;
     this->Superclass::Type = EMPTYLIST;
   }
-  bool GetIsUniform() const { return this->IsUniform; }
+  bool IsUniform() const noexcept { return this->IsUniformEntry; }
   int Read(vtkFoamIOobject& io);
   void ReadDictionary(vtkFoamIOobject& io, const vtkFoamToken& firstKeyword);
 
@@ -3133,6 +3160,7 @@ public:
   vtkFloatArray& ScalarList() { return *this->Superclass::ScalarListPtr; }
 
   const vtkFloatArray& VectorList() const { return *this->Superclass::VectorListPtr; }
+  vtkFloatArray& VectorList() { return *this->Superclass::VectorListPtr; }
 
   const vtkStringArray& StringList() const { return *this->Superclass::StringListPtr; }
   vtkStringArray& StringList() { return *this->Superclass::StringListPtr; }
@@ -3147,21 +3175,17 @@ public:
     return this->Superclass::AnyPointer; // List pointers are in a single union
   }
 
-  vtkStdString ToString() const
+  std::string ToString() const
   {
-    return this->Superclass::Type == STRING ? this->Superclass::ToString() : vtkStdString();
+    return this->Superclass::Type == STRING ? this->Superclass::ToString() : std::string();
   }
   float ToFloat() const
   {
-    return this->Superclass::Type == SCALAR || this->Superclass::Type == LABEL
-      ? this->Superclass::To<float>()
-      : 0.0F;
+    return this->Superclass::IsNumeric() ? this->Superclass::To<float>() : 0.0F;
   }
   double ToDouble() const
   {
-    return this->Superclass::Type == SCALAR || this->Superclass::Type == LABEL
-      ? this->Superclass::To<double>()
-      : 0.0;
+    return this->Superclass::IsNumeric() ? this->Superclass::To<double>() : 0.0;
   }
   // TODO is it ok to always use a 64bit int here?
   vtkTypeInt64 ToInt() const
@@ -3614,7 +3638,7 @@ struct vtkFoamEntry : public vtkFoamPtrList<vtkFoamEntryValue>
 {
 private:
   typedef vtkFoamPtrList<vtkFoamEntryValue> Superclass;
-  vtkStdString Keyword;
+  std::string Keyword;
   vtkFoamDict* UpperDictPtr;
 
   vtkFoamEntry() = delete;
@@ -3639,8 +3663,8 @@ public:
 
   void Clear() { this->Superclass::clear(); }
 
-  const vtkStdString& GetKeyword() const { return this->Keyword; }
-  void SetKeyword(const vtkStdString& keyword) { this->Keyword = keyword; }
+  const std::string& GetKeyword() const { return this->Keyword; }
+  void SetKeyword(const std::string& keyword) { this->Keyword = keyword; }
 
   const vtkFoamEntryValue& FirstValue() const { return *this->Superclass::operator[](0); }
   vtkFoamEntryValue& FirstValue() { return *this->Superclass::operator[](0); }
@@ -3654,6 +3678,7 @@ public:
   vtkFloatArray& ScalarList() { return this->FirstValue().ScalarList(); }
 
   const vtkFloatArray& VectorList() const { return this->FirstValue().VectorList(); }
+  vtkFloatArray& VectorList() { return this->FirstValue().VectorList(); }
 
   const vtkFoamDict& Dictionary() const { return this->FirstValue().Dictionary(); }
   vtkFoamDict& Dictionary() { return this->FirstValue().Dictionary(); }
@@ -3661,13 +3686,13 @@ public:
   void* Ptr() { return this->FirstValue().Ptr(); }
   const vtkFoamDict* GetUpperDictPtr() const { return this->UpperDictPtr; }
 
-  vtkStdString ToString() const
+  std::string ToString() const
   {
-    return !this->empty() ? this->FirstValue().ToString() : vtkStdString();
+    return this->empty() ? std::string() : this->FirstValue().ToString();
   }
-  float ToFloat() const { return !this->empty() ? this->FirstValue().ToFloat() : 0.0F; }
-  double ToDouble() const { return !this->empty() ? this->FirstValue().ToDouble() : 0.0; }
-  vtkTypeInt64 ToInt() const { return !this->empty() ? this->FirstValue().ToInt() : 0; }
+  float ToFloat() const { return this->empty() ? 0.0F : this->FirstValue().ToFloat(); }
+  double ToDouble() const { return this->empty() ? 0.0 : this->FirstValue().ToDouble(); }
+  vtkTypeInt64 ToInt() const { return this->empty() ? 0 : this->FirstValue().ToInt(); }
 
   void ReadDictionary(vtkFoamIOobject& io)
   {
@@ -3763,14 +3788,14 @@ public:
     return list;
   }
 
-  vtkFoamEntry* Lookup(const vtkStdString& keyword, bool regex = false) const
+  vtkFoamEntry* Lookup(const std::string& keyword, bool regex = false) const
   {
     if (this->Token.GetType() == vtkFoamToken::UNDEFINED)
     {
       int lastMatch = -1;
       for (size_t i = 0; i < this->Superclass::size(); i++)
       {
-        const vtkStdString& key = this->operator[](i)->GetKeyword();
+        const std::string& key = this->operator[](i)->GetKeyword();
         vtksys::RegularExpression rex;
         if (key == keyword) // found
         {
@@ -3943,7 +3968,7 @@ public:
           else if (currToken.GetType() == vtkFoamToken::IDENTIFIER)
           {
             // substitute identifier
-            const vtkStdString identifier(currToken.ToIdentifier());
+            const std::string identifier(currToken.ToIdentifier());
 
             for (const vtkFoamDict* uDictPtr = this;;)
             {
@@ -4022,21 +4047,45 @@ void vtkFoamIOobject::ReadHeader()
   }
   this->SetUseBinaryFormat("binary" == eptr->ToString()); // case sensitive
 
-  // Newer (binary) files have 'arch' entry with "label=(32|64) scalar=(32|64)"
-  // If this entry does not exist, or is incomplete, uses the fallback values
+  // Newer files have 'arch' entry with "label=(32|64) scalar=(32|64)"
+  // If this entry does not exist, or is incomplete, use the fallback values
   // that come from the reader (defined in constructor and Close)
   if ((eptr = headerDict.Lookup("arch")) != nullptr)
   {
-    const vtkStdString archValue(eptr->ToString());
-    vtksys::RegularExpression re;
+    const std::string archValue(eptr->ToString());
 
-    if (re.compile("^.*label *= *(32|64).*$") && re.find(archValue.c_str()))
+    // Match "label=(32|64)"
     {
-      this->SetLabel64("64" == re.match(1));
+      auto pos = archValue.find("label=");
+      if (pos != std::string::npos)
+      {
+        pos += 6; // Skip past "label="
+        if (archValue.compare(pos, 2, "32") == 0)
+        {
+          this->SetLabel64(false);
+        }
+        else if (archValue.compare(pos, 2, "64") == 0)
+        {
+          this->SetLabel64(true);
+        }
+      }
     }
-    if (re.compile("^.*scalar *= *(32|64).*$") && re.find(archValue.c_str()))
+
+    // Match "scalar=(32|64)"
     {
-      this->SetFloat64("64" == re.match(1));
+      auto pos = archValue.find("scalar=");
+      if (pos != std::string::npos)
+      {
+        pos += 7; // Skip past "scalar="
+        if (archValue.compare(pos, 2, "32") == 0)
+        {
+          this->SetFloat64(false);
+        }
+        else if (archValue.compare(pos, 2, "64") == 0)
+        {
+          this->SetFloat64(true);
+        }
+      }
     }
   }
 
@@ -4055,7 +4104,7 @@ void vtkFoamIOobject::ReadHeader()
 
 vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntry* upperEntryPtr)
   : vtkFoamToken(value)
-  , IsUniform(value.GetIsUniform())
+  , IsUniformEntry(value.IsUniform())
   , Managed(true)
   , UpperEntryPtr(upperEntryPtr)
 {
@@ -4526,7 +4575,7 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
     {
       throw vtkFoamError() << "Expected number, string or (, found " << currToken;
     }
-    this->IsUniform = true;
+    this->IsUniformEntry = true;
   }
   else if (currToken == "nonuniform")
   {
@@ -4534,7 +4583,7 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
     {
       throw vtkFoamError() << "Expected list type specifier, found EOF";
     }
-    this->IsUniform = false;
+    this->IsUniformEntry = false;
     if (currToken == "List<scalar>")
     {
       if (io.IsFloat64())
@@ -4627,7 +4676,7 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
   // uses lists without a uniform/nonuniform keyword
   else if (currToken == "List<scalar>")
   {
-    this->IsUniform = false;
+    this->IsUniformEntry = false;
     if (io.IsFloat64())
     {
       this->ReadNonuniformList<SCALARLIST, listTraits<vtkFloatArray, double>>(io);
@@ -4640,7 +4689,7 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
   // zones have list without a uniform/nonuniform keyword
   else if (currToken == "List<label>")
   {
-    this->IsUniform = false;
+    this->IsUniformEntry = false;
     if (io.IsLabel64())
     {
       this->ReadNonuniformList<LABELLIST, listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
@@ -4654,7 +4703,7 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
   {
     // List<bool> is read as a list of bytes (binary) or ints (ascii)
     // - primary location is the flipMap entry in faceZones
-    this->IsUniform = false;
+    this->IsUniformEntry = false;
     this->ReadNonuniformList<BOOLLIST, listTraits<vtkCharArray, char>>(io);
   }
   else if (currToken.GetType() == this->Superclass::PUNCTUATION ||
@@ -4737,7 +4786,7 @@ void vtkFoamEntry::Read(vtkFoamIOobject& io)
     if (this->Superclass::back()->GetType() == vtkFoamToken::IDENTIFIER)
     {
       // Substitute identifier
-      const vtkStdString identifier(this->Superclass::back()->ToIdentifier());
+      const std::string identifier(this->Superclass::back()->ToIdentifier());
       this->remove_back();
 
       for (const vtkFoamDict* uDictPtr = this->UpperDictPtr;;)
@@ -4949,8 +4998,8 @@ void vtkOpenFOAMReaderPrivate::SetTimeValue(double requestedTime)
 
 //------------------------------------------------------------------------------
 // Copy time instances information and create mesh times
-void vtkOpenFOAMReaderPrivate::SetupInformation(const vtkStdString& casePath,
-  const vtkStdString& regionName, const vtkStdString& procName, vtkOpenFOAMReaderPrivate* master,
+void vtkOpenFOAMReaderPrivate::SetupInformation(const std::string& casePath,
+  const std::string& regionName, const std::string& procName, vtkOpenFOAMReaderPrivate* master,
   bool requirePolyMesh)
 {
   // Copy parent, path and timestep information from master
@@ -4975,7 +5024,7 @@ void vtkOpenFOAMReaderPrivate::SetupInformation(const vtkStdString& casePath,
 
 //------------------------------------------------------------------------------
 void vtkOpenFOAMReaderPrivate::AddFieldName(
-  const vtkStdString& fieldName, const vtkStdString& fieldType, bool isLagrangian)
+  const std::string& fieldName, const std::string& fieldType, bool isLagrangian)
 {
   if (fieldName.empty() || fieldType.empty())
   {
@@ -5066,10 +5115,10 @@ void vtkOpenFOAMReaderPrivate::AddFieldName(
 }
 
 //------------------------------------------------------------------------------
-void vtkOpenFOAMReaderPrivate::GetFieldNames(const vtkStdString& tempPath, bool isLagrangian)
+void vtkOpenFOAMReaderPrivate::GetFieldNames(const std::string& tempPath, bool isLagrangian)
 {
   // Open the directory and get num of files
-  auto directory = vtkSmartPointer<vtkDirectory>::New();
+  vtkNew<vtkDirectory> directory;
   if (!directory->Open(tempPath.c_str()))
   {
     // No data
@@ -5080,8 +5129,8 @@ void vtkOpenFOAMReaderPrivate::GetFieldNames(const vtkStdString& tempPath, bool
   const vtkIdType nFieldFiles = directory->GetNumberOfFiles();
   for (vtkIdType fileI = 0; fileI < nFieldFiles; ++fileI)
   {
-    const vtkStdString fieldFile(directory->GetFile(fileI));
-    const size_t len = fieldFile.length();
+    const std::string fieldFile(directory->GetFile(fileI));
+    const auto len = fieldFile.length();
 
     if (!len || (fieldFile[len - 1] == '~') || directory->FileIsDirectory(fieldFile.c_str()))
     {
@@ -5125,9 +5174,9 @@ void vtkOpenFOAMReaderPrivate::GetFieldNames(const vtkStdString& tempPath, bool
 
 //------------------------------------------------------------------------------
 // locate laglangian clouds
-void vtkOpenFOAMReaderPrivate::LocateLagrangianClouds(const vtkStdString& timePath)
+void vtkOpenFOAMReaderPrivate::LocateLagrangianClouds(const std::string& timePath)
 {
-  auto directory = vtkSmartPointer<vtkDirectory>::New();
+  vtkNew<vtkDirectory> directory;
 
   if (directory->Open((timePath + this->RegionPath() + "/lagrangian").c_str()))
   {
@@ -5136,23 +5185,23 @@ void vtkOpenFOAMReaderPrivate::LocateLagrangianClouds(const vtkStdString& timePa
     bool isSubCloud = false;
     for (vtkIdType fileI = 0; fileI < nFiles; fileI++)
     {
-      const vtkStdString fileNameI(directory->GetFile(fileI));
+      const std::string fileNameI(directory->GetFile(fileI));
       if (fileNameI != "." && fileNameI != ".." && directory->FileIsDirectory(fileNameI.c_str()))
       {
         vtkFoamIOobject io(this->CasePath, this->Parent);
-        const vtkStdString subCloudName(this->RegionPrefix() + "lagrangian/" + fileNameI);
-        const vtkStdString subCloudFullPath(timePath + "/" + subCloudName);
+        const std::string subCloudName(this->RegionPrefix() + "lagrangian/" + fileNameI);
+        const std::string subCloudFullPath(timePath + "/" + subCloudName);
         // lagrangian positions. there are many concrete class names
         // e. g. Cloud<parcel>, basicKinematicCloud etc.
         if (io.OpenOrGzip(subCloudFullPath + "/positions") && io.GetObjectName() == "positions" &&
-          io.GetClassName().find("Cloud") != vtkStdString::npos)
+          io.GetClassName().find("Cloud") != std::string::npos)
         {
           isSubCloud = true;
           // a lagrangianPath has to be in a bit different format from
           // subCloudName to make the "lagrangian" reserved path
           // component and a mesh region with the same name
           // distinguishable later
-          const vtkStdString subCloudPath(this->RegionName + "/lagrangian/" + fileNameI);
+          const std::string subCloudPath(this->RegionName + "/lagrangian/" + fileNameI);
           if (this->Parent->LagrangianPaths->LookupValue(subCloudPath) == -1)
           {
             this->Parent->LagrangianPaths->InsertNextValue(subCloudPath);
@@ -5166,12 +5215,12 @@ void vtkOpenFOAMReaderPrivate::LocateLagrangianClouds(const vtkStdString& timePa
     if (!isSubCloud)
     {
       vtkFoamIOobject io(this->CasePath, this->Parent);
-      const vtkStdString cloudName(this->RegionPrefix() + "lagrangian");
-      const vtkStdString cloudFullPath(timePath + "/" + cloudName);
+      const std::string cloudName(this->RegionPrefix() + "lagrangian");
+      const std::string cloudFullPath(timePath + "/" + cloudName);
       if (io.OpenOrGzip(cloudFullPath + "/positions") && io.GetObjectName() == "positions" &&
-        io.GetClassName().find("Cloud") != vtkStdString::npos)
+        io.GetClassName().find("Cloud") != std::string::npos)
       {
-        const vtkStdString cloudPath(this->RegionName + "/lagrangian");
+        const std::string cloudPath(this->RegionName + "/lagrangian");
         if (this->Parent->LagrangianPaths->LookupValue(cloudPath) == -1)
         {
           this->Parent->LagrangianPaths->InsertNextValue(cloudPath);
@@ -5193,9 +5242,9 @@ void vtkOpenFOAMReaderPrivate::SortFieldFiles(vtkStringArray* selections, vtkStr
   auto names = vtkSmartPointer<vtkStringArray>::New();
   for (vtkIdType i = 0; i < files->GetNumberOfValues(); ++i)
   {
-    vtkStdString name(files->GetValue(i));
+    std::string name(files->GetValue(i));
     const auto ending = name.rfind(".gz");
-    if (ending != vtkStdString::npos)
+    if (ending != std::string::npos)
     {
       name.erase(ending);
     }
@@ -5259,7 +5308,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
 
         // The name/dictionary, from "polyMesh/boundary" entry
         const vtkFoamEntry* eptr = boundaryEntriesPtr->operator[](patchi);
-        const vtkStdString& patchName = eptr->GetKeyword();
+        const std::string& patchName = eptr->GetKeyword();
         const vtkFoamDict& patchDict = eptr->Dictionary();
 
         patch.name_ = patchName;
@@ -5283,7 +5332,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
           vtkErrorMacro(<< "No 'type' entry found for patch: " << patch.name_);
           return 0;
         }
-        const vtkStdString patchTypeName(eptr->ToString());
+        const std::string patchTypeName(eptr->ToString());
 
         // If the basic type of the patch is one of the following the
         // point-filtered values at patches are overridden by patch values
@@ -5329,7 +5378,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
     if (boundaryEntriesPtr)
     {
       // Add the internal mesh by default
-      const vtkStdString displayName(this->RegionPrefix() + NAME_INTERNALMESH);
+      const std::string displayName(this->RegionPrefix() + NAME_INTERNALMESH);
       this->Parent->PatchDataArraySelection->AddArray(displayName.c_str());
       this->InternalMeshSelectionStatus = this->Parent->GetPatchArrayStatus(displayName.c_str());
     }
@@ -5339,7 +5388,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
          citer != endIter; ++citer)
     {
       const std::string& groupName = citer->first;
-      const vtkStdString displayName(this->RegionPrefix() + "group/" + groupName);
+      const std::string displayName(this->RegionPrefix() + "group/" + groupName);
       if (this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()))
       {
         if (this->Parent->GetPatchArrayStatus(displayName.c_str()))
@@ -5358,7 +5407,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
     // Individual patches
     for (vtkFoamPatch& patch : this->BoundaryDict)
     {
-      const vtkStdString& patchName = patch.name_;
+      const std::string& patchName = patch.name_;
 
       // always hide processor patches for decomposed cases to keep
       // vtkAppendCompositeDataLeaves happy
@@ -5367,7 +5416,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
         continue;
       }
 
-      const vtkStdString displayName(this->RegionPrefix() + "patch/" + patchName);
+      const std::string displayName(this->RegionPrefix() + "patch/" + patchName);
       if (this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()))
       {
         if (this->Parent->GetPatchArrayStatus(displayName.c_str()))
@@ -5386,7 +5435,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
   }
 
   // Add scalars and vectors to metadata
-  vtkStdString timePath(this->CurrentTimePath());
+  std::string timePath(this->CurrentTimePath());
   // do not do "RemoveAllArrays()" to accumulate array selections
   // this->CellDataArraySelection->RemoveAllArrays();
   this->VolFieldFiles->Initialize();
@@ -5408,7 +5457,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
   // RequestData() so we don't have to worry about duplicated fields.
   if (listNextTimeStep && this->TimeValues->GetNumberOfTuples() >= 2 && this->TimeStep == 0)
   {
-    const vtkStdString timePath2(this->TimePath(1));
+    const std::string timePath2(this->TimePath(1));
     this->GetFieldNames(timePath2 + this->RegionPath());
     // if lagrangian clouds were not found at timestep 0
     if (this->Parent->LagrangianPaths->GetNumberOfTuples() == 0)
@@ -5468,7 +5517,7 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
     vtkErrorMacro(<< "No 'timeFormat' in controlDict");
     return false;
   }
-  const vtkStdString timeFormat(eptr->ToString());
+  const std::string timeFormat(eptr->ToString());
 
   // Default timePrecision is 6
   const vtkTypeInt64 timePrecision =
@@ -5480,9 +5529,9 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
     vtkErrorMacro(<< "No 'writeControl' in controlDict");
     return false;
   }
-  const vtkStdString writeControl(eptr->ToString());
+  const std::string writeControl(eptr->ToString());
 
-  double timeStepIncrement;
+  double timeStepIncrement = 1;
   if (writeControl == "timeStep")
   {
     timeStepIncrement = writeInterval * deltaT;
@@ -5504,7 +5553,7 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
   const int tempNumTimeSteps = static_cast<int>(tempResult + 0.5) + 1;
 
   // Make sure time step dir exists
-  vtkDirectory* test = vtkDirectory::New();
+  vtkNew<vtkDirectory> testdir;
   this->TimeValues->Initialize();
   this->TimeNames->Initialize();
 
@@ -5546,9 +5595,9 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
     // remove an extra 0 from exponent
     if (correctExponent)
     {
-      vtkStdString tempStr(parser.str());
-      vtkStdString::size_type pos = tempStr.find('e');
-      if (pos != vtkStdString::npos && tempStr.length() >= pos + 3 && tempStr[pos + 2] == '0')
+      std::string tempStr(parser.str());
+      const auto pos = tempStr.find('e');
+      if (pos != std::string::npos && tempStr.length() >= pos + 3 && tempStr[pos + 2] == '0')
       {
         tempStr.erase(pos + 2, 1);
         parser.str(tempStr);
@@ -5558,7 +5607,7 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
     // Add the time steps that actually exist to steps
     // allows the run to be stopped short of controlDict spec
     // allows for removal of timesteps
-    if (test->Open((this->CasePath + parser.str()).c_str()))
+    if (testdir->Open((this->CasePath + parser.str()).c_str()))
     {
       this->TimeValues->InsertNextValue(tempStep);
       this->TimeNames->InsertNextValue(parser.str());
@@ -5566,21 +5615,20 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
     // necessary for reading the case/0 directory whatever the timeFormat is
     // based on Foam::Time::operator++() cf. src/OpenFOAM/db/Time/Time.C
     else if ((fabs(tempStep) < 1.0e-14L) // 10*SMALL
-      && test->Open((this->CasePath + vtkStdString("0")).c_str()))
+      && testdir->Open((this->CasePath + std::string("0")).c_str()))
     {
       this->TimeValues->InsertNextValue(tempStep);
-      this->TimeNames->InsertNextValue(vtkStdString("0"));
+      this->TimeNames->InsertNextValue(std::string("0"));
     }
   }
-  test->Delete();
+
   this->TimeValues->Squeeze();
   this->TimeNames->Squeeze();
 
   if (this->TimeValues->GetNumberOfTuples() == 0)
   {
     // set the number of timesteps to 1 if the constant subdirectory exists
-    test = vtkDirectory::New();
-    if (test->Open((this->CasePath + "constant").c_str()))
+    if (testdir->Open((this->CasePath + "constant").c_str()))
     {
       parser.str("");
       parser << startTime;
@@ -5589,7 +5637,6 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
       this->TimeNames->InsertNextValue(parser.str());
       this->TimeNames->Squeeze();
     }
-    test->Delete();
   }
   return true;
 }
@@ -5600,10 +5647,9 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
 bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByInstances()
 {
   // Open the case directory
-  vtkDirectory* test = vtkDirectory::New();
-  if (!test->Open(this->CasePath.c_str()))
+  vtkNew<vtkDirectory> testdir;
+  if (!testdir->Open(this->CasePath.c_str()))
   {
-    test->Delete();
     vtkErrorMacro(<< "Can't open directory " << this->CasePath);
     return false;
   }
@@ -5614,22 +5660,22 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByInstances()
   // directories with names convertible to numbers
   this->TimeValues->Initialize();
   this->TimeNames->Initialize();
-  const vtkIdType nFiles = test->GetNumberOfFiles();
-  for (vtkIdType i = 0; i < nFiles; i++)
+  const vtkIdType nFiles = testdir->GetNumberOfFiles();
+  for (vtkIdType filei = 0; filei < nFiles; ++filei)
   {
-    const vtkStdString dir = test->GetFile(i);
-    int isTimeDir = test->FileIsDirectory(dir.c_str());
+    const std::string timeName = testdir->GetFile(filei);
+    bool isTimeDir = testdir->FileIsDirectory(timeName.c_str());
 
-    // optionally ignore 0/ directory
-    if (ignore0Dir && dir == "0")
+    if (!isTimeDir || timeName == "." || timeName == ".." || (ignore0Dir && timeName == "0"))
     {
-      isTimeDir = false;
+      // Skip files, optionally ignore 0/ directory
+      continue;
     }
 
-    // check if the name is convertible to a number
-    for (size_t j = 0; j < dir.length() && isTimeDir; ++j)
+    // Check if the name is convertible to a number
+    for (size_t j = 0; j < timeName.length() && isTimeDir; ++j)
     {
-      const char c = dir[j];
+      const char c = timeName[j];
       isTimeDir = (isdigit(c) || c == '+' || c == '-' || c == '.' || c == 'e' || c == 'E');
     }
     if (!isTimeDir)
@@ -5639,18 +5685,17 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByInstances()
 
     // convert to a number
     char* endptr;
-    double timeValue = strtod(dir.c_str(), &endptr);
+    double timeValue = strtod(timeName.c_str(), &endptr);
     // check if the value really was converted to a number
-    if (timeValue == 0.0 && endptr == dir.c_str())
+    if (timeValue == 0.0 && endptr == timeName.c_str())
     {
       continue;
     }
 
     // add to the instance list
     this->TimeValues->InsertNextValue(timeValue);
-    this->TimeNames->InsertNextValue(dir);
+    this->TimeNames->InsertNextValue(timeName);
   }
-  test->Delete();
 
   this->TimeValues->Squeeze();
   this->TimeNames->Squeeze();
@@ -5685,15 +5730,13 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByInstances()
   if (this->TimeValues->GetNumberOfTuples() == 0)
   {
     // set the number of timesteps to 1 if the constant subdirectory exists
-    test = vtkDirectory::New();
-    if (test->Open((this->CasePath + "constant").c_str()))
+    if (testdir->Open((this->CasePath + "constant").c_str()))
     {
       this->TimeValues->InsertNextValue(0.0);
       this->TimeValues->Squeeze();
       this->TimeNames->InsertNextValue("constant");
       this->TimeNames->Squeeze();
     }
-    test->Delete();
   }
 
   return true;
@@ -5701,8 +5744,8 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByInstances()
 
 //------------------------------------------------------------------------------
 // Gather the necessary information to create a path to the data
-bool vtkOpenFOAMReaderPrivate::MakeInformationVector(const vtkStdString& casePath,
-  const vtkStdString& controlDictPath, const vtkStdString& procName, vtkOpenFOAMReader* parent,
+bool vtkOpenFOAMReaderPrivate::MakeInformationVector(const std::string& casePath,
+  const std::string& controlDictPath, const std::string& procName, vtkOpenFOAMReader* parent,
   bool requirePolyMesh)
 {
   this->CasePath = casePath;
@@ -5744,7 +5787,7 @@ bool vtkOpenFOAMReaderPrivate::MakeInformationVector(const vtkStdString& casePat
       vtkErrorMacro(<< "No 'writeControl' in " << io.GetFileName());
       return false;
     }
-    const vtkStdString writeControl(eptr->ToString());
+    const std::string writeControl(eptr->ToString());
 
     // list time directories according to controlDict.
     // When (adjustTimeStep, writeControl) == (on, adjustableRunTime) or (off, timeStep)
@@ -5754,7 +5797,7 @@ bool vtkOpenFOAMReaderPrivate::MakeInformationVector(const vtkStdString& casePat
     bool adjustTimeStep = false;
     if ((eptr = dict.Lookup("adjustTimeStep")) != nullptr)
     {
-      const vtkStdString sw(eptr->ToString());
+      const std::string sw(eptr->ToString());
 
       // Switch values for 'true' (cf. src/OpenFOAM/db/Switch/Switch.C)
       adjustTimeStep = (sw == "on" || sw == "yes" || sw == "y" || sw == "true" || sw == "t");
@@ -5805,7 +5848,7 @@ bool vtkOpenFOAMReaderPrivate::MakeInformationVector(const vtkStdString& casePat
 
 //------------------------------------------------------------------------------
 void vtkOpenFOAMReaderPrivate::AppendMeshDirToArray(
-  vtkStringArray* polyMeshDir, const vtkStdString& path, int timeI)
+  vtkStringArray* polyMeshDir, const std::string& path, int timeI)
 {
   vtkFoamIOobject io(this->CasePath, this->Parent);
 
@@ -5844,7 +5887,7 @@ void vtkOpenFOAMReaderPrivate::PopulatePolyMeshDirArrays()
   for (int i = 0; i < static_cast<int>(nSteps); i++)
   {
     // create the path to the timestep
-    vtkStdString polyMeshPath = this->TimeRegionPath(i) + "/polyMesh/";
+    std::string polyMeshPath = this->TimeRegionPath(i) + "/polyMesh/";
     AppendMeshDirToArray(this->PolyMeshPointsDir, polyMeshPath + "points", i);
     AppendMeshDirToArray(this->PolyMeshFacesDir, polyMeshPath + "faces", i);
   }
@@ -5855,8 +5898,7 @@ void vtkOpenFOAMReaderPrivate::PopulatePolyMeshDirArrays()
 vtkFloatArray* vtkOpenFOAMReaderPrivate::ReadPointsFile()
 {
   // path to points file
-  const vtkStdString pointPath =
-    this->CurrentTimeRegionMeshPath(this->PolyMeshPointsDir) + "points";
+  const std::string pointPath = this->CurrentTimeRegionMeshPath(this->PolyMeshPointsDir) + "points";
 
   vtkFoamIOobject io(this->CasePath, this->Parent);
   if (!io.OpenOrGzip(pointPath))
@@ -5902,13 +5944,13 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::ReadPointsFile()
 
 //------------------------------------------------------------------------------
 // read the faces into a vtkFoamLabelListList
-vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadFacesFile(const vtkStdString& meshDir)
+vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadFacesFile(const std::string& meshDir)
 {
   vtkFoamIOobject io(this->CasePath, this->Parent);
 
   // Read polyMesh/faces
   {
-    const vtkStdString facePath(meshDir + "faces");
+    const std::string facePath(meshDir + "faces");
     if (!io.OpenOrGzip(facePath))
     {
       vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError()
@@ -5942,13 +5984,13 @@ vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadFacesFile(const vtkStdString
 
 //------------------------------------------------------------------------------
 // Read owner, neighbour files and create cellFaces
-vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const vtkStdString& meshDir)
+vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& meshDir)
 {
   vtkFoamIOobject io(this->CasePath, this->Parent);
 
   // Read polyMesh/owner
   {
-    const vtkStdString ownPath(meshDir + "owner");
+    const std::string ownPath(meshDir + "owner");
     if (!io.OpenOrGzip(ownPath))
     {
       vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
@@ -5982,7 +6024,7 @@ vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const vt
 
   // Read polyMesh/neighbour
   {
-    const vtkStdString neiPath(meshDir + "neighbour");
+    const std::string neiPath(meshDir + "neighbour");
     if (!io.OpenOrGzip(neiPath))
     {
       vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
@@ -5993,7 +6035,7 @@ vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const vt
   if (use64BitLabels != io.IsLabel64())
   {
     vtkErrorMacro(<< "owner/neighbour with different label-size: should not happen"
-                  << io.GetCasePath().c_str());
+                  << io.GetCasePath());
     return nullptr;
   }
 
@@ -7220,7 +7262,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
       if (prevEndFace >= 0 && prevEndFace != startFace)
       {
         vtkErrorMacro(<< "The end face number " << prevEndFace - 1 << " of patch "
-                      << this->BoundaryDict[patchi - 1].name_.c_str()
+                      << this->BoundaryDict[patchi - 1].name_
                       << " is inconsistent with start face number " << startFace << " of patch "
                       << patch.name_);
         return nullptr;
@@ -7230,7 +7272,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     if (prevEndFace > facesPoints->GetNumberOfElements())
     {
       vtkErrorMacro(<< "The end face number " << prevEndFace - 1 << " of the last patch "
-                    << this->BoundaryDict.back().name_.c_str() << " exceeds the number of faces "
+                    << this->BoundaryDict.back().name_ << " exceeds the number of faces "
                     << facesPoints->GetNumberOfElements());
       return nullptr;
     }
@@ -7784,14 +7826,14 @@ void vtkOpenFOAMReaderPrivate::InterpolateCellToPoint(vtkFloatArray* pData, vtkF
 
 //------------------------------------------------------------------------------
 bool vtkOpenFOAMReaderPrivate::ReadFieldFile(vtkFoamIOobject& io, vtkFoamDict& dict,
-  const vtkStdString& varName, const vtkDataArraySelection* selection)
+  const std::string& varName, const vtkDataArraySelection* selection)
 {
-  const vtkStdString varPath(this->CurrentTimeRegionPath() + "/" + varName);
+  const std::string varPath(this->CurrentTimeRegionPath() + "/" + varName);
 
   // Open the file
   if (!io.Open(varPath))
   {
-    vtkErrorMacro(<< "Error opening " << io.GetFileName().c_str() << ": " << io.GetError().c_str());
+    vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
     return false;
   }
 
@@ -7805,14 +7847,14 @@ bool vtkOpenFOAMReaderPrivate::ReadFieldFile(vtkFoamIOobject& io, vtkFoamDict& d
   // Read the field file into dictionary
   if (!dict.Read(io))
   {
-    vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of "
-                  << io.GetFileName().c_str() << ": " << io.GetError().c_str());
+    vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
+                  << ": " << io.GetError());
     return false;
   }
 
   if (dict.GetType() != vtkFoamToken::DICTIONARY)
   {
-    vtkErrorMacro(<< "File " << io.GetFileName().c_str() << "is not valid as a field file");
+    vtkErrorMacro(<< "File " << io.GetFileName() << "is not valid as a field file");
     return false;
   }
   return true;
@@ -7823,9 +7865,9 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry& entry, vtkIdTyp
   const vtkFoamIOobject& io, vtkFoamTypes::dataType fieldDataType)
 {
   vtkFloatArray* data;
-  const vtkStdString& className = io.GetClassName();
+  const std::string& className = io.GetClassName();
 
-  if (entry.FirstValue().GetIsUniform())
+  if (entry.FirstValue().IsUniform())
   {
     if (entry.FirstValue().GetType() == vtkFoamToken::SCALAR ||
       entry.FirstValue().GetType() == vtkFoamToken::LABEL)
@@ -8084,7 +8126,7 @@ std::string vtkOpenFOAMReaderPrivate::ConstructDimensions(const vtkFoamDict& dic
 //------------------------------------------------------------------------------
 // Read volume or internal field at a timestep
 void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
-  const vtkStdString& varName, bool isInternalField)
+  const std::string& varName, bool isInternalField)
 {
   vtkUnstructuredGrid* internalMesh = this->InternalMesh;
   vtkMultiBlockDataSet* boundaryMesh = this->BoundaryMesh;
@@ -8097,7 +8139,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   }
 
   // For internal field (eg, volScalarField::Internal)
-  const bool hasColons = (io.GetClassName().find("::Internal") != vtkStdString::npos);
+  const bool hasColons = (io.GetClassName().find("::Internal") != std::string::npos);
 
   if ((io.GetClassName().compare(0, 3, "vol") != 0) ||
     (hasColons ? !isInternalField : isInternalField))
@@ -8112,7 +8154,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   // The internalField
   vtkFoamEntry* iEntry = nullptr;
   {
-    const vtkStdString entryName = (isInternalField ? "value" : "internalField");
+    const std::string entryName = (isInternalField ? "value" : "internalField");
 
     iEntry = dict.Lookup(entryName);
     if (iEntry == nullptr)
@@ -8243,7 +8285,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
     const vtkIdType nFaces = patch.size_;
 
     vtkFloatArray* vData = nullptr;
-    vtkStdString bcType;
+    std::string bcType;
 
     if (bfieldEntries != nullptr)
     {
@@ -8427,7 +8469,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
 
 //------------------------------------------------------------------------------
 // Read point field at a timestep
-void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const vtkStdString& varName)
+void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varName)
 {
   vtkUnstructuredGrid* internalMesh = this->InternalMesh;
   vtkMultiBlockDataSet* boundaryMesh = this->BoundaryMesh;
@@ -8566,15 +8608,15 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
 
   for (int cloudI = 0; cloudI < this->Parent->LagrangianPaths->GetNumberOfTuples(); cloudI++)
   {
-    const vtkStdString& pathI = this->Parent->LagrangianPaths->GetValue(cloudI);
+    const std::string& pathI = this->Parent->LagrangianPaths->GetValue(cloudI);
 
     // still can't distinguish on patch selection panel, but can
     // distinguish the "lagrangian" reserved path component and a mesh
     // region with the same name
-    vtkStdString subCloudName;
+    std::string subCloudName;
     if (pathI[0] == '/')
     {
-      subCloudName = pathI.substr(1, vtkStdString::npos);
+      subCloudName = pathI.substr(1, std::string::npos);
     }
     else
     {
@@ -8586,8 +8628,8 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
       continue;
     }
 
-    const vtkStdString cloudPath(this->CurrentTimePath() + "/" + subCloudName + "/");
-    const vtkStdString positionsPath(cloudPath + "positions");
+    const std::string cloudPath(this->CurrentTimePath() + "/" + subCloudName + "/");
+    const std::string positionsPath(cloudPath + "positions");
 
     // create an empty mesh to keep node/leaf structure of the
     // multi-block consistent even if mesh doesn't exist
@@ -8646,7 +8688,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
     // read lagrangian fields
     for (int fieldI = 0; fieldI < this->LagrangianFieldFiles->GetNumberOfValues(); fieldI++)
     {
-      const vtkStdString varPath(cloudPath + this->LagrangianFieldFiles->GetValue(fieldI));
+      const std::string varPath(cloudPath + this->LagrangianFieldFiles->GetValue(fieldI));
 
       vtkFoamIOobject io2(this->CasePath, this->Parent);
       if (!io2.Open(varPath))
@@ -8658,7 +8700,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
       }
 
       // if the variable is disabled on selection panel then skip it
-      const vtkStdString selectionName(io2.GetObjectName());
+      const std::string selectionName(io2.GetObjectName());
       if (this->Parent->LagrangianDataArraySelection->ArrayExists(selectionName.c_str()) &&
         !this->Parent->GetLagrangianArrayStatus(selectionName.c_str()))
       {
@@ -8669,8 +8711,8 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
       vtkFoamEntryValue dict2(nullptr);
       if (!dict2.ReadField(io2))
       {
-        vtkErrorMacro(<< "Error reading line " << io2.GetLineNumber() << " of "
-                      << io2.GetFileName().c_str() << ": " << io2.GetError().c_str());
+        vtkErrorMacro(<< "Error reading line " << io2.GetLineNumber() << " of " << io2.GetFileName()
+                      << ": " << io2.GetError());
         continue;
       }
 
@@ -8678,8 +8720,8 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
       if (dict2.GetType() != vtkFoamToken::SCALARLIST &&
         dict2.GetType() != vtkFoamToken::VECTORLIST && dict2.GetType() != vtkFoamToken::LABELLIST)
       {
-        vtkErrorMacro(<< io2.GetFileName().c_str() << ": Unsupported lagrangian field type "
-                      << io2.GetClassName().c_str());
+        vtkErrorMacro(<< io2.GetFileName() << ": Unsupported lagrangian field type "
+                      << io2.GetClassName());
         continue;
       }
 
@@ -8689,7 +8731,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
       const vtkIdType nParticles2 = lData->GetNumberOfTuples();
       if (nParticles2 != meshI->GetNumberOfCells())
       {
-        vtkErrorMacro(<< io2.GetFileName().c_str()
+        vtkErrorMacro(<< io2.GetFileName()
                       << ": Sizes of lagrangian mesh and field don't match: mesh = "
                       << meshI->GetNumberOfCells() << ", field = " << nParticles2);
         lData->Delete();
@@ -8714,7 +8756,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
 std::unique_ptr<vtkFoamDict> vtkOpenFOAMReaderPrivate::GatherBlocks(
   const char* typeName, bool mandatory)
 {
-  vtkStdString blockPath(this->CurrentTimeRegionMeshPath(this->PolyMeshFacesDir) + typeName);
+  std::string blockPath(this->CurrentTimeRegionMeshPath(this->PolyMeshFacesDir) + typeName);
 
   vtkFoamIOobject io(this->CasePath, this->Parent);
   if (!io.OpenOrGzip(blockPath))
@@ -8768,7 +8810,7 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
   for (unsigned zonei = 0; zonei < nZones; ++zonei)
   {
-    const vtkStdString& zoneName = zones[zonei]->GetKeyword();
+    const std::string& zoneName = zones[zonei]->GetKeyword();
     const vtkFoamDict& dict = zones[zonei]->Dictionary();
 
     // Look up cellLabels
@@ -8849,7 +8891,7 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
 
   for (unsigned zonei = 0; zonei < nZones; ++zonei)
   {
-    const vtkStdString& zoneName = zones[zonei]->GetKeyword();
+    const std::string& zoneName = zones[zonei]->GetKeyword();
     const vtkFoamDict& dict = zones[zonei]->Dictionary();
 
     // Look up faceLabels
@@ -8944,7 +8986,7 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
   for (unsigned zonei = 0; zonei < nZones; ++zonei)
   {
-    const vtkStdString& zoneName = zones[zonei]->GetKeyword();
+    const std::string& zoneName = zones[zonei]->GetKeyword();
     const vtkFoamDict& dict = zones[zonei]->Dictionary();
 
     // Look up pointLabels
@@ -9059,7 +9101,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
   }
 
   vtkFoamLabelListList* facePoints = nullptr;
-  vtkStdString meshDir;
+  std::string meshDir;
   if (createEulerians && (recreateInternalMesh || recreateBoundaryMesh))
   {
     // Path to polyMesh/ files
@@ -9115,7 +9157,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
   // Create Internal Mesh only if required for display
   if (createEulerians && recreateInternalMesh)
   {
-    const vtkStdString displayName(this->RegionPrefix() + NAME_INTERNALMESH);
+    const std::string displayName(this->RegionPrefix() + NAME_INTERNALMESH);
     if (this->Parent->GetPatchArrayStatus(displayName.c_str()))
     {
       this->InternalMesh = this->MakeInternalMesh(cellFaces, facePoints, pointArray);
@@ -9779,7 +9821,7 @@ int vtkOpenFOAMReader::RequestData(vtkInformation* vtkNotUsed(request),
       if (reader->RequestData(
             subOutput, recreateInternalMesh, recreateBoundaryMesh, updateVariables))
       {
-        vtkStdString regionName(reader->GetRegionName());
+        std::string regionName(reader->GetRegionName());
         if (regionName.empty())
         {
           regionName = "defaultRegion";
@@ -9833,7 +9875,7 @@ void vtkOpenFOAMReader::SetTimeInformation(
 int vtkOpenFOAMReader::MakeInformationVector(
   vtkInformationVector* outputVector, const vtkStdString& procName)
 {
-  *this->FileNameOld = vtkStdString(this->FileName);
+  this->FileNameOld->assign(this->FileName);
 
   // Clear prior case information
   this->Readers->RemoveAllItems();
@@ -9853,11 +9895,11 @@ int vtkOpenFOAMReader::MakeInformationVector(
   // A multi-region case will often not have the default region
 
   bool hasDefaultRegion = false;
-  std::vector<vtkStdString> regionNames;
+  std::vector<std::string> regionNames;
 
   {
-    const vtkStdString constantPath(casePath + "constant/");
-    auto dir = vtkSmartPointer<vtkDirectory>::New();
+    const std::string constantPath(casePath + "constant/");
+    vtkNew<vtkDirectory> dir;
     if (!dir->Open(constantPath.c_str()))
     {
       vtkErrorMacro(<< "Cannot open directory: " << constantPath);
@@ -9865,7 +9907,7 @@ int vtkOpenFOAMReader::MakeInformationVector(
     }
 
     {
-      const vtkStdString meshTestFile(constantPath + "polyMesh/faces");
+      const std::string meshTestFile(constantPath + "polyMesh/faces");
       if (vtksys::SystemTools::FileExists(meshTestFile, true) ||
         vtksys::SystemTools::FileExists(meshTestFile + ".gz", true))
       {
@@ -9875,10 +9917,10 @@ int vtkOpenFOAMReader::MakeInformationVector(
 
     for (vtkIdType entryi = 0; entryi < dir->GetNumberOfFiles(); ++entryi)
     {
-      vtkStdString subDir(dir->GetFile(entryi));
+      std::string subDir(dir->GetFile(entryi));
       if (subDir != "." && subDir != ".." && dir->FileIsDirectory(subDir.c_str()))
       {
-        const vtkStdString meshTestFile(constantPath + subDir + "/polyMesh/faces");
+        const std::string meshTestFile(constantPath + subDir + "/polyMesh/faces");
         if (vtksys::SystemTools::FileExists(meshTestFile, true) ||
           vtksys::SystemTools::FileExists(meshTestFile + ".gz", true))
         {
@@ -9941,15 +9983,15 @@ int vtkOpenFOAMReader::MakeInformationVector(
 void vtkOpenFOAMReader::CreateCasePath(vtkStdString& casePath, vtkStdString& controlDictPath)
 {
 #if defined(_WIN32)
-  const vtkStdString pathFindSeparator = "/\\", pathSeparator = "\\";
+  const std::string pathFindSeparator = "/\\", pathSeparator = "\\";
 #else
-  const vtkStdString pathFindSeparator = "/", pathSeparator = "/";
+  const std::string pathFindSeparator = "/", pathSeparator = "/";
 #endif
   controlDictPath = this->FileName;
 
   // determine the case directory and path to controlDict
-  vtkStdString::size_type pos = controlDictPath.find_last_of(pathFindSeparator);
-  if (pos == vtkStdString::npos)
+  auto pos = controlDictPath.find_last_of(pathFindSeparator);
+  if (pos == std::string::npos)
   {
     // if there's no prepending path, prefix with the current directory
     controlDictPath = "." + pathSeparator + controlDictPath;
@@ -9966,7 +10008,7 @@ void vtkOpenFOAMReader::CreateCasePath(vtkStdString& casePath, vtkStdString& con
     else
     {
       pos = casePath.find_last_of(pathFindSeparator);
-      if (pos == vtkStdString::npos)
+      if (pos == std::string::npos)
       {
         casePath = "." + pathSeparator;
       }
-- 
GitLab


From 43a8cc69bf32aab3590d6aa25767205cd7e97956 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 29 Jan 2021 11:55:10 +0100
Subject: [PATCH 05/36] openfoam: reduce some file checks for topo change or
 points moved

- use vtkTypeInt8Array instead of vtkCharArray for storing booleans
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 105 ++++++++++++++----------------
 1 file changed, 49 insertions(+), 56 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index a9b0b306b20..fba6ce71785 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -831,7 +831,7 @@ private:
   }
 
   // Append time directories for mesh
-  void AppendMeshDirToArray(vtkStringArray*, const std::string&, int);
+  void AppendMeshDirToArray(vtkStringArray*, vtkIdType timeIndex, bool changed);
 
   // Search time directories for mesh
   void PopulatePolyMeshDirArrays();
@@ -1417,7 +1417,7 @@ public:
 };
 
 template <>
-inline bool vtkFoamToken::Is<char>() const
+inline bool vtkFoamToken::Is<vtkTypeInt8>() const
 {
   // masquerade for bool
   return this->Type == LABEL;
@@ -1449,10 +1449,11 @@ inline bool vtkFoamToken::Is<double>() const
   return this->Type == SCALAR;
 }
 
+// ie, a bool value
 template <>
-inline char vtkFoamToken::To<char>() const
+inline vtkTypeInt8 vtkFoamToken::To<vtkTypeInt8>() const
 {
-  return static_cast<char>(this->Int);
+  return static_cast<vtkTypeInt8>(this->Int);
 }
 
 template <>
@@ -1575,6 +1576,13 @@ public:
     INPUT_MODE_ERROR
   };
 
+  // Check for existence of specified file
+  static bool IsFile(const std::string& file, bool checkGzip = true)
+  {
+    return (vtksys::SystemTools::FileExists(file, true) ||
+      (checkGzip && vtksys::SystemTools::FileExists(file + ".gz", true)));
+  }
+
   // Generic exception throwing with stack trace
   void ThrowStackTrace(const std::string& msg);
 
@@ -2807,23 +2815,23 @@ private:
   void ReadHeader();
 
   // Attempt to open file (or file.gz) and read header
-  bool OpenFile(const std::string& file, bool fallbackGzip = false)
+  bool OpenFile(const std::string& file, bool checkGzip = false)
   {
     try
     {
       this->Superclass::Open(file);
-      fallbackGzip = false;
+      checkGzip = false;
     }
     catch (const vtkFoamError& err)
     {
-      if (!fallbackGzip)
+      if (!checkGzip)
       {
         this->SetError(err);
         return false;
       }
     }
 
-    if (fallbackGzip)
+    if (checkGzip)
     {
       try
       {
@@ -2896,9 +2904,9 @@ public:
 };
 
 template <>
-inline char vtkFoamReadValue<char>::ReadValue(vtkFoamIOobject& io)
+inline vtkTypeInt8 vtkFoamReadValue<vtkTypeInt8>::ReadValue(vtkFoamIOobject& io)
 {
-  return static_cast<char>(io.ReadIntValue());
+  return static_cast<vtkTypeInt8>(io.ReadIntValue());
 }
 
 template <>
@@ -2960,10 +2968,7 @@ public:
     void ReadUniformValues(vtkFoamIOobject& io, const vtkIdType size)
     {
       primitiveT value = vtkFoamReadValue<primitiveT>::ReadValue(io);
-      for (vtkIdType i = 0; i < size; i++)
-      {
-        this->Ptr->SetValue(i, value);
-      }
+      this->Ptr->FillValue(value);
     }
 
     void ReadAsciiList(vtkFoamIOobject& io, const vtkIdType size)
@@ -4704,7 +4709,7 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
     // List<bool> is read as a list of bytes (binary) or ints (ascii)
     // - primary location is the flipMap entry in faceZones
     this->IsUniformEntry = false;
-    this->ReadNonuniformList<BOOLLIST, listTraits<vtkCharArray, char>>(io);
+    this->ReadNonuniformList<BOOLLIST, listTraits<vtkTypeInt8Array, vtkTypeInt8>>(io);
   }
   else if (currToken.GetType() == this->Superclass::PUNCTUATION ||
     currToken.GetType() == this->Superclass::LABEL ||
@@ -5847,29 +5852,24 @@ bool vtkOpenFOAMReaderPrivate::MakeInformationVector(const std::string& casePath
 }
 
 //------------------------------------------------------------------------------
+// Append time value for a mesh points/faces change
 void vtkOpenFOAMReaderPrivate::AppendMeshDirToArray(
-  vtkStringArray* polyMeshDir, const std::string& path, int timeI)
+  vtkStringArray* instances, vtkIdType timeIndex, bool changed)
 {
-  vtkFoamIOobject io(this->CasePath, this->Parent);
-
-  if (io.OpenOrGzip(path))
+  if (changed)
   {
-    io.Close();
-    // set points/faces location to current timesteps value
-    polyMeshDir->SetValue(timeI, this->TimeNames->GetValue(timeI));
+    // Changed, set to current time instance name
+    instances->SetValue(timeIndex, this->TimeNames->GetValue(timeIndex));
+  }
+  else if (timeIndex > 0)
+  {
+    // No change, set to previous time instance name
+    instances->SetValue(timeIndex, instances->GetValue(timeIndex - 1));
   }
   else
   {
-    if (timeI != 0)
-    {
-      // set points/faces location to previous timesteps value
-      polyMeshDir->SetValue(timeI, polyMeshDir->GetValue(timeI - 1));
-    }
-    else
-    {
-      // set points/faces to constant
-      polyMeshDir->SetValue(timeI, "constant");
-    }
+    // No change for the first instance, set to "constant" time instance
+    instances->SetValue(timeIndex, "constant");
   }
 }
 
@@ -5879,17 +5879,21 @@ void vtkOpenFOAMReaderPrivate::AppendMeshDirToArray(
 void vtkOpenFOAMReaderPrivate::PopulatePolyMeshDirArrays()
 {
   // initialize size to number of timesteps
-  vtkIdType nSteps = this->TimeValues->GetNumberOfTuples();
-  this->PolyMeshPointsDir->SetNumberOfValues(nSteps);
-  this->PolyMeshFacesDir->SetNumberOfValues(nSteps);
+  const vtkIdType nTimes = this->TimeValues->GetNumberOfTuples();
+  this->PolyMeshPointsDir->SetNumberOfValues(nTimes);
+  this->PolyMeshFacesDir->SetNumberOfValues(nTimes);
 
-  // loop through each timestep
-  for (int i = 0; i < static_cast<int>(nSteps); i++)
+  for (vtkIdType timei = 0; timei < nTimes; ++timei)
   {
-    // create the path to the timestep
-    std::string polyMeshPath = this->TimeRegionPath(i) + "/polyMesh/";
-    AppendMeshDirToArray(this->PolyMeshPointsDir, polyMeshPath + "points", i);
-    AppendMeshDirToArray(this->PolyMeshFacesDir, polyMeshPath + "faces", i);
+    // The mesh directory for this timestep
+    const std::string meshDir(this->TimeRegionPath(timei) + "/polyMesh/");
+
+    const bool hasMeshDir = vtksys::SystemTools::FileIsDirectory(meshDir);
+    const bool topoChanged = hasMeshDir && vtkFoamFile::IsFile(meshDir + "faces", true);
+    const bool pointsMoved = hasMeshDir && vtkFoamFile::IsFile(meshDir + "points", true);
+
+    AppendMeshDirToArray(this->PolyMeshFacesDir, timei, topoChanged);
+    AppendMeshDirToArray(this->PolyMeshPointsDir, timei, pointsMoved);
   }
 }
 
@@ -9906,26 +9910,15 @@ int vtkOpenFOAMReader::MakeInformationVector(
       return 0;
     }
 
-    {
-      const std::string meshTestFile(constantPath + "polyMesh/faces");
-      if (vtksys::SystemTools::FileExists(meshTestFile, true) ||
-        vtksys::SystemTools::FileExists(meshTestFile + ".gz", true))
-      {
-        hasDefaultRegion = true;
-      }
-    }
+    hasDefaultRegion = vtkFoamFile::IsFile(constantPath + "polyMesh/faces", true);
 
     for (vtkIdType entryi = 0; entryi < dir->GetNumberOfFiles(); ++entryi)
     {
       std::string subDir(dir->GetFile(entryi));
-      if (subDir != "." && subDir != ".." && dir->FileIsDirectory(subDir.c_str()))
+      if (subDir != "." && subDir != ".." && dir->FileIsDirectory(subDir.c_str()) &&
+        vtkFoamFile::IsFile((constantPath + subDir + "/polyMesh/faces"), true))
       {
-        const std::string meshTestFile(constantPath + subDir + "/polyMesh/faces");
-        if (vtksys::SystemTools::FileExists(meshTestFile, true) ||
-          vtksys::SystemTools::FileExists(meshTestFile + ".gz", true))
-        {
-          regionNames.push_back(std::move(subDir));
-        }
+        regionNames.push_back(std::move(subDir));
       }
     }
 
-- 
GitLab


From 515294c295baa85355364c8d1032a5931459d1b6 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 29 Jan 2021 11:55:27 +0100
Subject: [PATCH 06/36] openfoam: remove zones without triggering a reread

- relocate state-change logic into the private class
  for a better overview and more flexibility
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 222 +++++++++++++++++++-----------
 1 file changed, 139 insertions(+), 83 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index fba6ce71785..d297a775fc3 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -78,6 +78,24 @@
 // This could also be made part of the GUI properties
 #define VTK_FOAMFILE_IGNORE_FIELD_RESTART 0
 
+//------------------------------------------------------------------------------
+// Developer option to debug the reader states
+#define VTK_FOAMFILE_DEBUG 0
+
+// Similar to vtkErrorMacro etc.
+#if VTK_FOAMFILE_DEBUG
+#define vtkFoamDebug(x)                                                                            \
+  do                                                                                               \
+  {                                                                                                \
+    std::cerr << "" x;                                                                             \
+  } while (false)
+#else
+#define vtkFoamDebug(x)                                                                            \
+  do                                                                                               \
+  {                                                                                                \
+  } while (false)
+#endif // VTK_FOAMFILE_DEBUG
+
 //------------------------------------------------------------------------------
 
 #include "vtkOpenFOAMReader.h"
@@ -727,7 +745,7 @@ public:
   const std::string& GetRegionName() const noexcept { return this->RegionName; }
 
   // Read mesh/fields and create dataset
-  int RequestData(vtkMultiBlockDataSet*, bool, bool, bool);
+  int RequestData(vtkMultiBlockDataSet* output);
   int MakeMetaDataAtTimeStep(vtkStringArray*, vtkStringArray*, vtkStringArray*, bool);
 
   // Gather time instances information and create mesh times
@@ -789,7 +807,7 @@ private:
   vtkMultiBlockDataSet* FaceZoneMesh;
   vtkMultiBlockDataSet* PointZoneMesh;
 
-  // For polyhedra handling
+  // For polyhedral decomposition
   int NumTotalAdditionalCells;
   vtkIdTypeArray* AdditionalCellIds;
   vtkIntArray* NumAdditionalCells;
@@ -805,6 +823,7 @@ private:
   // Clear mesh construction
   void ClearInternalMeshes();
   void ClearBoundaryMeshes();
+  void ClearZoneMeshes();
   void ClearMeshes();
 
   std::string RegionPath() const
@@ -4878,13 +4897,12 @@ vtkOpenFOAMReaderPrivate::vtkOpenFOAMReaderPrivate()
   this->FaceZoneMesh = nullptr;
   this->CellZoneMesh = nullptr;
 
-  // For decomposing polyhedra
-  this->NumAdditionalCells = nullptr;
+  // For polyhedral decomposition
+  this->NumTotalAdditionalCells = 0;
   this->AdditionalCellIds = nullptr;
   this->NumAdditionalCells = nullptr;
   this->AdditionalCellPoints = nullptr;
 
-  this->NumTotalAdditionalCells = 0;
   this->Parent = nullptr;
 }
 
@@ -4916,6 +4934,9 @@ void vtkOpenFOAMReaderPrivate::ClearInternalMeshes()
     this->InternalMesh->Delete();
     this->InternalMesh = nullptr;
   }
+
+  // For polyhedral decomposition
+  this->NumTotalAdditionalCells = 0;
   if (this->AdditionalCellIds != nullptr)
   {
     this->AdditionalCellIds->Delete();
@@ -4926,9 +4947,13 @@ void vtkOpenFOAMReaderPrivate::ClearInternalMeshes()
     this->NumAdditionalCells->Delete();
     this->NumAdditionalCells = nullptr;
   }
+
   delete this->AdditionalCellPoints;
   this->AdditionalCellPoints = nullptr;
+}
 
+void vtkOpenFOAMReaderPrivate::ClearZoneMeshes()
+{
   if (this->PointZoneMesh != nullptr)
   {
     this->PointZoneMesh->Delete();
@@ -4978,6 +5003,7 @@ void vtkOpenFOAMReaderPrivate::ClearMeshes()
 {
   this->ClearInternalMeshes();
   this->ClearBoundaryMeshes();
+  this->ClearZoneMeshes();
 }
 
 void vtkOpenFOAMReaderPrivate::SetTimeValue(double requestedTime)
@@ -5007,6 +5033,9 @@ void vtkOpenFOAMReaderPrivate::SetupInformation(const std::string& casePath,
   const std::string& regionName, const std::string& procName, vtkOpenFOAMReaderPrivate* master,
   bool requirePolyMesh)
 {
+  vtkFoamDebug(<< "SetupInformation (" << this->RegionName << "/" << procName
+               << ") polyMesh:" << requirePolyMesh << "\n");
+
   // Copy parent, path and timestep information from master
   this->CasePath = casePath;
   this->RegionName = regionName;
@@ -5271,6 +5300,9 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
   vtkStringArray* pointSelectionNames, vtkStringArray* lagrangianSelectionNames,
   bool listNextTimeStep)
 {
+  vtkFoamDebug(<< "MakeMetaDataAtTimeStep (" << this->RegionName << "/" << this->ProcessorName
+               << ")\n");
+
   if (!this->HasPolyMesh())
   {
     // Ignore a region without a mesh, but will normally be precluded earlier
@@ -5753,6 +5785,9 @@ bool vtkOpenFOAMReaderPrivate::MakeInformationVector(const std::string& casePath
   const std::string& controlDictPath, const std::string& procName, vtkOpenFOAMReader* parent,
   bool requirePolyMesh)
 {
+  vtkFoamDebug(<< "MakeInformationVector (" << this->RegionName << "/" << procName
+               << ") polyMesh:" << requirePolyMesh << " - list times\n");
+
   this->CasePath = casePath;
   this->ProcessorName = procName;
   this->Parent = parent;
@@ -9063,8 +9098,7 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
 //------------------------------------------------------------------------------
 // return 0 if there's any error, 1 if success
-int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool recreateInternalMesh,
-  bool recreateBoundaryMesh, bool updateVariables)
+int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
 {
   if (!this->HasPolyMesh())
   {
@@ -9073,6 +9107,15 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
     return 1;
   }
 
+  //----------------------------------------
+  // Determine changes in state
+
+  // Basics
+  const bool changedStorageType =
+    (this->Parent->Use64BitLabels != this->Parent->Use64BitLabelsOld) ||
+    (this->Parent->Use64BitFloats != this->Parent->Use64BitFloatsOld);
+
+  // Mesh changes
   const bool topoChanged = (this->TimeStepOld == -1) || (this->FaceOwner == nullptr) ||
     (this->PolyMeshFacesDir->GetValue(this->TimeStep) !=
       this->PolyMeshFacesDir->GetValue(this->TimeStepOld));
@@ -9081,10 +9124,44 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
     (this->PolyMeshPointsDir->GetValue(this->TimeStep) !=
       this->PolyMeshPointsDir->GetValue(this->TimeStepOld));
 
+  // Internal mesh
+  bool recreateInternalMesh = (changedStorageType) || (topoChanged) || (!this->Parent->CacheMesh) ||
+    (this->Parent->SkipZeroTime != this->Parent->SkipZeroTimeOld) ||
+    (this->Parent->ListTimeStepsByControlDict != this->Parent->ListTimeStepsByControlDictOld);
+
+  // Internal mesh - selection changes
   recreateInternalMesh |=
-    (topoChanged) || (this->InternalMeshSelectionStatus != this->InternalMeshSelectionStatusOld);
+    (this->InternalMeshSelectionStatus != this->InternalMeshSelectionStatusOld);
+
+  if (this->InternalMeshSelectionStatus)
+  {
+    // Cell representation changed that affects the internalMesh
+    recreateInternalMesh |=
+      (this->Parent->DecomposePolyhedra != this->Parent->DecomposePolyhedraOld);
+  }
+
+  // NOTE: this is still not quite right for zones, but until we get better separation
+  // - can remove zones without triggering reread
+  recreateInternalMesh |=
+    (this->Parent->ReadZones && (this->Parent->ReadZones != this->Parent->ReadZonesOld));
+
+  // Boundary mesh
+  bool recreateBoundaryMesh = (changedStorageType) ||
+    (this->Parent->PatchDataArraySelection->GetMTime() != this->Parent->PatchSelectionMTimeOld) ||
+    (this->Parent->CreateCellToPoint != this->Parent->CreateCellToPointOld);
+
+  // Fields
+  bool updateVariables = (changedStorageType) || (this->TimeStep != this->TimeStepOld) ||
+    (this->Parent->CellDataArraySelection->GetMTime() != this->Parent->CellSelectionMTimeOld) ||
+    (this->Parent->PointDataArraySelection->GetMTime() != this->Parent->PointSelectionMTimeOld) ||
+    (this->Parent->LagrangianDataArraySelection->GetMTime() !=
+      this->Parent->LagrangianSelectionMTimeOld) ||
+    (this->Parent->PositionsIsIn13Format != this->Parent->PositionsIsIn13FormatOld) ||
+    (this->Parent->AddDimensionsToArrayNames != this->Parent->AddDimensionsToArrayNamesOld);
+
+  // Apply these changes too
   recreateBoundaryMesh |= recreateInternalMesh;
-  updateVariables |= recreateBoundaryMesh || (this->TimeStep != this->TimeStepOld);
+  updateVariables |= recreateBoundaryMesh;
 
   const bool moveInternalPoints = !recreateInternalMesh && pointsMoved;
   const bool moveBoundaryPoints = !recreateBoundaryMesh && pointsMoved;
@@ -9094,15 +9171,33 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
     this->Parent->PatchDataArraySelection->ArrayExists(NAME_INTERNALMESH) ||
     !this->RegionName.empty();
 
-  // determine if we need to reconstruct meshes
+  vtkFoamDebug(<< "RequestData (" << this->RegionName << "/" << this->ProcessorName << ")\n"
+               << " internal=" << recreateInternalMesh      //
+               << " boundary=" << recreateBoundaryMesh      //
+               << " zones=" << this->Parent->GetReadZones() //
+               << " topoChanged=" << topoChanged            //
+               << " pointsMoved=" << pointsMoved            //
+               << " variables=" << updateVariables          //
+               << " eulerians=" << createEulerians          //
+               << "\n");
+
+  //----------------------------------------
+
+  // Determine if we need to reconstruct meshes
   if (recreateInternalMesh)
   {
     this->ClearInternalMeshes();
+    this->ClearZoneMeshes();
   }
   if (recreateBoundaryMesh)
   {
     this->ClearBoundaryMeshes();
   }
+  // Discard unwanted remnant zones
+  if (!this->Parent->GetReadZones())
+  {
+    this->ClearZoneMeshes();
+  }
 
   vtkFoamLabelListList* facePoints = nullptr;
   std::string meshDir;
@@ -9166,10 +9261,11 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
     {
       this->InternalMesh = this->MakeInternalMesh(cellFaces, facePoints, pointArray);
     }
-    // read and construct zones
+
+    // Read and construct zones
     if (this->Parent->GetReadZones())
     {
-      vtkPoints* points;
+      vtkPoints* points = nullptr;
       if (this->InternalMesh != nullptr)
       {
         points = this->InternalMesh->GetPoints();
@@ -9183,8 +9279,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
       this->PointZoneMesh = vtkMultiBlockDataSet::New();
       if (!this->GetPointZoneMesh(this->PointZoneMesh, points))
       {
-        this->PointZoneMesh->Delete();
-        this->PointZoneMesh = nullptr;
+        this->ClearZoneMeshes();
         delete cellFaces;
         delete facePoints;
         if (this->InternalMesh == nullptr)
@@ -9203,13 +9298,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
       this->FaceZoneMesh = vtkMultiBlockDataSet::New();
       if (!this->GetFaceZoneMesh(this->FaceZoneMesh, facePoints, points))
       {
-        this->FaceZoneMesh->Delete();
-        this->FaceZoneMesh = nullptr;
-        if (this->PointZoneMesh != nullptr)
-        {
-          this->PointZoneMesh->Delete();
-          this->PointZoneMesh = nullptr;
-        }
+        this->ClearZoneMeshes();
         delete cellFaces;
         delete facePoints;
         if (this->InternalMesh == nullptr)
@@ -9228,18 +9317,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
       this->CellZoneMesh = vtkMultiBlockDataSet::New();
       if (!this->GetCellZoneMesh(this->CellZoneMesh, cellFaces, facePoints, points))
       {
-        this->CellZoneMesh->Delete();
-        this->CellZoneMesh = nullptr;
-        if (this->FaceZoneMesh != nullptr)
-        {
-          this->FaceZoneMesh->Delete();
-          this->FaceZoneMesh = nullptr;
-        }
-        if (this->PointZoneMesh != nullptr)
-        {
-          this->PointZoneMesh->Delete();
-          this->PointZoneMesh = nullptr;
-        }
+        this->ClearZoneMeshes();
         delete cellFaces;
         delete facePoints;
         if (this->InternalMesh == nullptr)
@@ -9354,19 +9432,21 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output, bool rec
   {
     if (createEulerians)
     {
+      // Clean up arrays of the previous timestep
+
+      // Internal
       if (!recreateInternalMesh && this->InternalMesh != nullptr)
       {
-        // clean up arrays of the previous timestep
-        // Check if Internal Mesh Exists first...
         this->InternalMesh->GetCellData()->Initialize();
         this->InternalMesh->GetPointData()->Initialize();
       }
-      // Check if Boundary Mesh Exists first...
+
+      // Boundary
       if (!recreateBoundaryMesh && this->BoundaryMesh != nullptr)
       {
         for (unsigned int i = 0; i < this->BoundaryMesh->GetNumberOfBlocks(); i++)
         {
-          vtkPolyData* bm = vtkPolyData::SafeDownCast(this->BoundaryMesh->GetBlock(i));
+          auto* bm = vtkPolyData::SafeDownCast(this->BoundaryMesh->GetBlock(i));
           bm->GetCellData()->Initialize();
           bm->GetPointData()->Initialize();
         }
@@ -9749,22 +9829,25 @@ int vtkOpenFOAMReader::RequestData(vtkInformation* vtkNotUsed(request),
   vtkMultiBlockDataSet* output =
     vtkMultiBlockDataSet::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));
 
-  int nSteps = 0;
-  double requestedTimeValue(0);
-  if (outInfo->Has(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP()))
+  // Times
   {
-    nSteps = outInfo->Length(vtkStreamingDemandDrivenPipeline::TIME_STEPS());
+    int nTimes = 0;
+    double requestedTimeValue(0);
+    if (outInfo->Has(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP()))
+    {
+      nTimes = outInfo->Length(vtkStreamingDemandDrivenPipeline::TIME_STEPS());
 
-    requestedTimeValue = (1 == nSteps
-        // Only one time-step available, UPDATE_TIME_STEP is unreliable
-        ? outInfo->Get(vtkStreamingDemandDrivenPipeline::TIME_STEPS(), 0)
-        : outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP()));
-  }
+      requestedTimeValue = (1 == nTimes
+          // Only one time-step available, UPDATE_TIME_STEP is unreliable
+          ? outInfo->Get(vtkStreamingDemandDrivenPipeline::TIME_STEPS(), 0)
+          : outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP()));
+    }
 
-  if (nSteps > 0)
-  {
-    outInfo->Set(vtkDataObject::DATA_TIME_STEP(), requestedTimeValue);
-    this->SetTimeValue(requestedTimeValue);
+    if (nTimes > 0)
+    {
+      outInfo->Set(vtkDataObject::DATA_TIME_STEP(), requestedTimeValue);
+      this->SetTimeValue(requestedTimeValue);
+    }
   }
 
   if (this->Parent == this)
@@ -9777,42 +9860,17 @@ int vtkOpenFOAMReader::RequestData(vtkInformation* vtkNotUsed(request),
     this->CurrentReaderIndex = 0;
   }
 
-  // Determine changes in flags etc.
-
-  const bool changedStorageType =
-    (this->Parent->Use64BitLabels != this->Parent->Use64BitLabelsOld) ||
-    (this->Parent->Use64BitFloats != this->Parent->Use64BitFloatsOld);
-
-  // internal mesh selection change is detected within each reader
-  const bool recreateInternalMesh = (changedStorageType) || (!this->Parent->CacheMesh) ||
-    (this->Parent->DecomposePolyhedra != this->Parent->DecomposePolyhedraOld) ||
-    (this->Parent->ReadZones != this->Parent->ReadZonesOld) ||
-    (this->Parent->SkipZeroTime != this->Parent->SkipZeroTimeOld) ||
-    (this->Parent->ListTimeStepsByControlDict != this->Parent->ListTimeStepsByControlDictOld);
-
-  const bool recreateBoundaryMesh = (changedStorageType) ||
-    (this->Parent->PatchDataArraySelection->GetMTime() != this->Parent->PatchSelectionMTimeOld) ||
-    (this->Parent->CreateCellToPoint != this->Parent->CreateCellToPointOld);
-
-  const bool updateVariables = (changedStorageType) ||
-    (this->Parent->CellDataArraySelection->GetMTime() != this->Parent->CellSelectionMTimeOld) ||
-    (this->Parent->PointDataArraySelection->GetMTime() != this->Parent->PointSelectionMTimeOld) ||
-    (this->Parent->LagrangianDataArraySelection->GetMTime() !=
-      this->Parent->LagrangianSelectionMTimeOld) ||
-    (this->Parent->PositionsIsIn13Format != this->Parent->PositionsIsIn13FormatOld) ||
-    (this->Parent->AddDimensionsToArrayNames != this->Parent->AddDimensionsToArrayNamesOld);
-
-  // create dataset
+  // Create dataset
   int ret = 1;
   vtkOpenFOAMReaderPrivate* reader;
-  // if the only region is not a subregion, omit being wrapped by a
-  // multiblock dataset
+
+  // Avoid wrapping single region as a multiblock dataset
   if (this->Readers->GetNumberOfItems() == 1 &&
     (reader = vtkOpenFOAMReaderPrivate::SafeDownCast(this->Readers->GetItemAsObject(0)))
       ->GetRegionName()
       .empty())
   {
-    ret = reader->RequestData(output, recreateInternalMesh, recreateBoundaryMesh, updateVariables);
+    ret = reader->RequestData(output);
     this->Parent->CurrentReaderIndex++;
   }
   else
@@ -9821,9 +9879,8 @@ int vtkOpenFOAMReader::RequestData(vtkInformation* vtkNotUsed(request),
     while ((reader = vtkOpenFOAMReaderPrivate::SafeDownCast(
               this->Readers->GetNextItemAsObject())) != nullptr)
     {
-      vtkMultiBlockDataSet* subOutput = vtkMultiBlockDataSet::New();
-      if (reader->RequestData(
-            subOutput, recreateInternalMesh, recreateBoundaryMesh, updateVariables))
+      auto subOutput = vtkSmartPointer<vtkMultiBlockDataSet>::New();
+      if (reader->RequestData(subOutput))
       {
         std::string regionName(reader->GetRegionName());
         if (regionName.empty())
@@ -9839,7 +9896,6 @@ int vtkOpenFOAMReader::RequestData(vtkInformation* vtkNotUsed(request),
       {
         ret = 0;
       }
-      subOutput->Delete();
       this->Parent->CurrentReaderIndex++;
     }
   }
-- 
GitLab


From da9bdb9cc28569a6e73aca88f64e51df3bed343b Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 29 Jan 2021 13:41:08 +0100
Subject: [PATCH 07/36] openfoam: refactor bookkeeping and checks for
 boundaries

- localize some sanity checks to the input routines, to improve
  future maintenance

- define input mesh sizes (NumCell, NumFaces, ...) when the
  information is obtained instead of relying on the caller.

- improve some memory management by using unique_ptr instead of raw
  pointers in a few places
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 1350 +++++++++++++++++------------
 1 file changed, 796 insertions(+), 554 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index d297a775fc3..7dcc874e674 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -126,6 +126,7 @@
 #include "vtkPolyhedron.h"
 #include "vtkPyramid.h"
 #include "vtkQuad.h"
+#include "vtkSmartPointer.h"
 #include "vtkSortDataArray.h"
 #include "vtkStreamingDemandDrivenPipeline.h"
 #include "vtkStringArray.h"
@@ -138,6 +139,7 @@
 #include "vtkTypeUInt8Array.h"
 #include "vtkUnstructuredGrid.h"
 #include "vtkVertex.h"
+#include "vtkWeakPointer.h"
 #include "vtkWedge.h"
 
 #if !(defined(_WIN32) && !defined(__CYGWIN__) || defined(__LIBCATAMOUNT__))
@@ -633,38 +635,75 @@ struct vtkFoamPatch
   };
 
   std::string name_;
-  vtkIdType index_;
-  vtkIdType start_;
-  vtkIdType size_;
-  vtkIdType offset_; // The start-face offset into all boundaries
-  patchType type_;
+  vtkIdType index_ = 0;
+  vtkIdType start_ = 0;
+  vtkIdType size_ = 0;
+  vtkIdType offset_ = 0; // The start-face offset into all boundaries
+  patchType type_ = patchType::GEOMETRICAL;
+  bool owner_ = true; // Patch owner (processor patch)
+
+  // The first patch face
+  vtkIdType startFace() const noexcept { return (this->start_); }
+
+  // One beyond the last patch face
+  vtkIdType endFace() const noexcept { return (this->start_ + this->size_); }
+
+  // The patch local face (as per OpenFOAM polyPatch)
+  vtkIdType whichFace(vtkIdType meshFacei) const { return (meshFacei - this->start_); }
 };
 
 //------------------------------------------------------------------------------
-// struct vtkFoamBoundaryDict
+// struct vtkFoamBoundaries
 // A collection of boundary patches with additional grouping and selection information
-struct vtkFoamBoundaryDict : public std::vector<vtkFoamPatch>
+struct vtkFoamBoundaries : public std::vector<vtkFoamPatch>
 {
+  // Collect and forwarding of errors (cannot use vtkErrorMacro here)
+  vtkFoamError error_;
+
   // Patch groups, according to the inGroups keyword
   std::map<std::string, std::vector<vtkIdType>> groups;
 
-  // Indices of active patches. Selected directly or via a group
+  // Active patch groups
+  std::unordered_set<std::string> groupActive;
+
+  // Active patch indices, selected directly
   std::unordered_set<vtkIdType> patchActive;
 
-  // we need to keep the path to time directory where the current mesh
-  // is read from, since boundaryDict may be accessed multiple times
-  // at a timestep for patch selections
-  std::string TimeDir;
+  // Active patch indices, selected by group
+  std::unordered_set<vtkIdType> patchActiveByGroup;
+
+  // We maintain the corresponding face-instances time directory
+  // to ensure that topology or other changes are noticed
+  std::string timeName_;
 
-  // Reset storage
+  // Reset group and patch selections
+  void clearSelections()
+  {
+    groupActive.clear();
+    patchActive.clear();
+    patchActiveByGroup.clear();
+  }
+
+  // Reset storage and errors, leaves timeName intact
   void clearAll()
   {
     this->clear();
+    error_.clear();
     groups.clear();
-    patchActive.clear();
+    this->clearSelections();
   }
 
-  void enablePatch(const vtkIdType patchIndex) { patchActive.emplace(patchIndex); }
+  const vtkFoamError& error() const noexcept { return error_; }
+  vtkFoamError& error() noexcept { return error_; }
+
+  // The start label of boundary faces in the polyMesh face list.
+  // Same as mesh nInternalFaces() if boundaries exist
+  vtkIdType startFace() const { return this->empty() ? 0 : this->front().startFace(); }
+
+  // One beyond the last boundary face
+  vtkIdType endFace() const { return this->empty() ? 0 : this->back().endFace(); }
+
+  void enablePatch(vtkIdType patchIndex) { patchActive.emplace(patchIndex); }
 
   void enableGroup(const std::string& groupName)
   {
@@ -674,16 +713,24 @@ struct vtkFoamBoundaryDict : public std::vector<vtkFoamPatch>
       const std::vector<vtkIdType>& patchIndices = citer->second;
       for (const vtkIdType patchIndex : patchIndices)
       {
-        patchActive.emplace(patchIndex);
+        patchActiveByGroup.emplace(patchIndex);
       }
     }
   }
 
   // True if given patch index is active
-  bool isActive(const vtkIdType patchIndex) const
+  bool isActive(vtkIdType patchIndex) const
   {
-    return (patchActive.find(patchIndex) != patchActive.end());
+    return (patchActive.find(patchIndex) != patchActive.end()) ||
+      (patchActiveByGroup.find(patchIndex) != patchActiveByGroup.end());
   }
+
+  // Set contents from dictionary
+  // Return false on errors
+  bool update(const vtkFoamDict& dict);
+
+  // The patch index for a given face label, -1 for internal face or out-of-bounds
+  vtkIdType whichPatch(vtkIdType faceIndex) const;
 };
 
 //------------------------------------------------------------------------------
@@ -788,8 +835,9 @@ private:
   vtkIdType NumFaces;
   vtkIdType NumCells;
 
-  // The face owner (labelList)
+  // The face owner, neighbour (labelList)
   vtkDataArray* FaceOwner;
+  vtkDataArray* FaceNeigh;
 
   // For cell-to-point interpolation
   vtkPolyData* AllBoundaries;
@@ -800,7 +848,7 @@ private:
   vtkUnstructuredGrid* InternalMesh;
   vtkMultiBlockDataSet* BoundaryMesh;
   vtkFoamLabelArrayVector* BoundaryPointMap;
-  vtkFoamBoundaryDict BoundaryDict;
+  vtkFoamBoundaries BoundaryDict;
 
   // Zones
   vtkMultiBlockDataSet* CellZoneMesh;
@@ -872,24 +920,33 @@ private:
   vtkFloatArray* ReadPointsFile();
 
   // Read polyMesh/faces (faceCompactList or faceList)
-  vtkFoamLabelListList* ReadFacesFile(const std::string& meshDir);
+  std::unique_ptr<vtkFoamLabelListList> ReadFacesFile(const std::string& meshDir);
+
+  // Read polyMesh/{owner,neighbour}, check overall number of faces. Return meshCells
+  std::unique_ptr<vtkFoamLabelListList> ReadOwnerNeighbourFiles(const std::string& meshDir);
 
-  // Read polyMesh/{owner,neighbour} and check overall number of faces
-  vtkFoamLabelListList* ReadOwnerNeighbourFiles(const std::string& meshDir);
+  // Create meshCells from owner/neighbour information
+  std::unique_ptr<vtkFoamLabelListList> CreateCellFaces(
+    const vtkDataArray& faceOwner, const vtkDataArray& faceNeigh);
 
   bool CheckFaceList(const vtkFoamLabelListList& faces);
 
-  // Create mesh
-  void InsertCellsToGrid(vtkUnstructuredGrid*, const vtkFoamLabelListList*,
-    const vtkFoamLabelListList*, vtkFloatArray*, vtkIdTypeArray* additionalCellIds = nullptr,
-    vtkDataArray* cellLabels = nullptr);
-  vtkUnstructuredGrid* MakeInternalMesh(
-    const vtkFoamLabelListList*, const vtkFoamLabelListList*, vtkFloatArray*);
-  void InsertFacesToGrid(vtkPolyData*, const vtkFoamLabelListList*, vtkIdType, vtkIdType,
-    vtkDataArray*, vtkIdList*, vtkDataArray*, bool);
+  // Create volume mesh
+  void InsertCellsToGrid(vtkUnstructuredGrid*, const vtkFoamLabelListList& meshCells,
+    const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray,
+    vtkIdTypeArray* additionalCellIds = nullptr, vtkDataArray* cellLabels = nullptr);
+
+  vtkUnstructuredGrid* MakeInternalMesh(const vtkFoamLabelListList& meshCells,
+    const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
+
+  void InsertFacesToGrid(vtkPolyData*, const vtkFoamLabelListList& meshFaces, vtkIdType startFace,
+    vtkIdType endFace, vtkDataArray*, vtkIdList*, vtkDataArray*, bool);
+
   template <typename T1, typename T2>
   bool ExtendArray(T1*, vtkIdType);
-  vtkMultiBlockDataSet* MakeBoundaryMesh(const vtkFoamLabelListList*, vtkFloatArray*);
+
+  vtkMultiBlockDataSet* MakeBoundaryMesh(const vtkFoamLabelListList& meshFaces, vtkFloatArray*);
+
   void TruncateFaceOwner();
 
   // Move additional points for decomposed cells
@@ -919,9 +976,10 @@ private:
   std::unique_ptr<vtkFoamDict> GatherBlocks(const char* typeName, bool mandatory);
 
   // Create (cell|face|point) zones
-  bool GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList*,
-    const vtkFoamLabelListList*, vtkPoints*);
-  bool GetFaceZoneMesh(vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList*, vtkPoints*);
+  bool GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList& meshCells,
+    const vtkFoamLabelListList& meshFaces, vtkPoints*);
+  bool GetFaceZoneMesh(
+    vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList& meshFaces, vtkPoints*);
   bool GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh, vtkPoints*);
 };
 
@@ -4893,6 +4951,7 @@ vtkOpenFOAMReaderPrivate::vtkOpenFOAMReaderPrivate()
   this->BoundaryMesh = nullptr;
   this->BoundaryPointMap = nullptr;
   this->FaceOwner = nullptr;
+  this->FaceNeigh = nullptr;
   this->PointZoneMesh = nullptr;
   this->FaceZoneMesh = nullptr;
   this->CellZoneMesh = nullptr;
@@ -4929,6 +4988,11 @@ void vtkOpenFOAMReaderPrivate::ClearInternalMeshes()
     this->FaceOwner->Delete();
     this->FaceOwner = nullptr;
   }
+  if (this->FaceNeigh != nullptr)
+  {
+    this->FaceNeigh->Delete();
+    this->FaceNeigh = nullptr;
+  }
   if (this->InternalMesh != nullptr)
   {
     this->InternalMesh->Delete();
@@ -5295,178 +5359,302 @@ void vtkOpenFOAMReaderPrivate::SortFieldFiles(vtkStringArray* selections, vtkStr
 }
 
 //------------------------------------------------------------------------------
-// Create field data lists and cell/point array selection lists
-int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelectionNames,
-  vtkStringArray* pointSelectionNames, vtkStringArray* lagrangianSelectionNames,
-  bool listNextTimeStep)
+// Set contents from dictionary information read from the polyMesh/boundary file
+bool vtkFoamBoundaries::update(const vtkFoamDict& dict)
 {
-  vtkFoamDebug(<< "MakeMetaDataAtTimeStep (" << this->RegionName << "/" << this->ProcessorName
-               << ")\n");
+  auto& patches = *this;
+  patches.clearAll();
+  patches.resize(dict.size());
+  auto& inGroups = patches.groups;
 
-  if (!this->HasPolyMesh())
-  {
-    // Ignore a region without a mesh, but will normally be precluded earlier
-    vtkWarningMacro("Called MakeMetaDataAtTimeStep without a mesh.");
-    return 1;
-  }
+  const auto nBoundaries = static_cast<vtkIdType>(patches.size());
 
-  // Read the patches from the boundary file into selection array
-  if (this->PolyMeshFacesDir->GetValue(this->TimeStep) != this->BoundaryDict.TimeDir ||
-    this->Parent->PatchDataArraySelection->GetMTime() != this->Parent->PatchSelectionMTimeOld)
+  vtkIdType endFace = -1; // for sanity check
+  vtkTypeInt64 nBoundaryFaces = 0;
+
+  for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
   {
-    this->BoundaryDict.clearAll();
-    this->BoundaryDict.TimeDir = this->PolyMeshFacesDir->GetValue(this->TimeStep);
+    // The name/dictionary, from "polyMesh/boundary" entry
+    const vtkFoamEntry* eptr = dict[patchi];
+    const std::string& patchName = eptr->GetKeyword();
+    const vtkFoamDict& patchDict = eptr->Dictionary();
 
-    const bool isSubRegion = !this->RegionName.empty();
-    auto boundaryEntriesPtr(this->GatherBlocks("boundary", isSubRegion));
-    if (!boundaryEntriesPtr)
+    // The patch entry to populate
+    vtkFoamPatch& patch = patches[patchi];
+    patch.index_ = patchi;
+    patch.offset_ = nBoundaryFaces;
+    patch.type_ = vtkFoamPatch::GEOMETRICAL;
+    patch.owner_ = true; // Patch owner (processor patch)
+
+    patch.name_ = patchName;
+    if ((eptr = patchDict.Lookup("type")) == nullptr)
     {
-      if (isSubRegion)
-      {
-        return 0;
-      }
+      this->error() // Report errors
+        << "No 'type' entry found for patch: " << patch.name_;
+      return false;
     }
-    else
-    {
-      const vtkIdType nBoundaries = static_cast<vtkIdType>(boundaryEntriesPtr->size());
+    const std::string patchTypeName(eptr->ToString());
 
-      this->BoundaryDict.resize(nBoundaries);
-      auto& inGroups = this->BoundaryDict.groups;
-
-      // Iterate through each entry in the boundary file
-      vtkTypeInt64 allBoundariesStartFace = 0;
-      for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
-      {
-        // The patch entry to populate
-        vtkFoamPatch& patch = this->BoundaryDict[patchi];
-        patch.index_ = patchi;
-        patch.offset_ = allBoundariesStartFace;
-        patch.type_ = vtkFoamPatch::GEOMETRICAL;
+    if ((eptr = patchDict.Lookup("startFace")) == nullptr)
+    {
+      this->error() // Report errors
+        << "No 'startFace' entry found for patch: " << patch.name_;
+      return false;
+    }
+    patch.start_ = eptr->ToInt();
 
-        // The name/dictionary, from "polyMesh/boundary" entry
-        const vtkFoamEntry* eptr = boundaryEntriesPtr->operator[](patchi);
-        const std::string& patchName = eptr->GetKeyword();
-        const vtkFoamDict& patchDict = eptr->Dictionary();
+    if ((eptr = patchDict.Lookup("nFaces")) == nullptr)
+    {
+      this->error() // Report errors
+        << "No 'nFaces' entry found for patch: " << patch.name_;
+      return false;
+    }
+    patch.size_ = eptr->ToInt();
 
-        patch.name_ = patchName;
+    // Size, consistency sanity checks
+    if (patch.start_ < 0 || patch.size_ < 0)
+    {
+      this->error() // Report errors
+        << "The startFace:" << patch.start_ << " or nFaces:" << patch.size_
+        << " are negative for patch " << patch.name_;
+      return false;
+    }
+    if (endFace >= 0 && endFace != patch.start_)
+    {
+      this->error() // Report errors
+        << "The end face number " << (endFace - 1) << " of patch " << patches[patchi - 1].name_
+        << " is inconsistent with start face number " << patch.start_ << " of patch "
+        << patch.name_;
+      return false;
+    }
+    endFace = patch.endFace(); // <- The startFace for the next patch index
 
-        if ((eptr = patchDict.Lookup("nFaces")) == nullptr)
-        {
-          vtkErrorMacro(<< "No 'nFaces' entry found for patch: " << patch.name_);
-          return 0;
-        }
-        patch.size_ = eptr->ToInt();
+    // If the basic type of the patch is one of the following the
+    // point-filtered values at patches are overridden by patch values
+    if (patchTypeName == "patch" || patchTypeName == "wall" || patchTypeName == "mappedWall")
+    {
+      patch.type_ = vtkFoamPatch::PHYSICAL;
+      nBoundaryFaces += patch.size_;
+    }
+    else if (patchTypeName == "processor" || patchTypeName == "processorCyclic")
+    {
+      patch.type_ = vtkFoamPatch::PROCESSOR;
+      nBoundaryFaces += patch.size_;
 
-        if ((eptr = patchDict.Lookup("startFace")) == nullptr)
-        {
-          vtkErrorMacro(<< "No 'startFace' entry found for patch: " << patch.name_);
-          return 0;
-        }
-        patch.start_ = eptr->ToInt();
+      // Note owner/neighbour relationship for processor patch
+      const auto* ownptr = patchDict.Lookup("myProcNo");
+      const auto* neiptr = patchDict.Lookup("neighbProcNo");
 
-        if ((eptr = patchDict.Lookup("type")) == nullptr)
-        {
-          vtkErrorMacro(<< "No 'type' entry found for patch: " << patch.name_);
-          return 0;
-        }
-        const std::string patchTypeName(eptr->ToString());
+      if (ownptr != nullptr && neiptr != nullptr &&
+        (ownptr->FirstValue().GetType() == vtkFoamToken::LABEL) &&
+        (neiptr->FirstValue().GetType() == vtkFoamToken::LABEL))
+      {
+        const vtkTypeInt64 own = ownptr->FirstValue().ToInt();
+        const vtkTypeInt64 nei = neiptr->FirstValue().ToInt();
+        patch.owner_ = (own < nei);
+      }
+    }
 
-        // If the basic type of the patch is one of the following the
-        // point-filtered values at patches are overridden by patch values
-        if (patchTypeName == "patch" || patchTypeName == "wall" || patchTypeName == "mappedWall")
-        {
-          patch.type_ = vtkFoamPatch::PHYSICAL;
-          allBoundariesStartFace += patch.size_;
-        }
-        else if (patchTypeName == "processor")
+    // Handle inGroups which could have this type of content:
+    //   - inGroups (name1 .. nameN);
+    //   - inGroups 2(name1 name2);
+    // but never for processor boundaries (potential clutter or false positives)
+    if ((eptr = patchDict.Lookup("inGroups")) != nullptr && patch.type_ != vtkFoamPatch::PROCESSOR)
+    {
+      for (const vtkFoamEntryValue* subentry : *eptr)
+      {
+        if (subentry && subentry->GetType() == vtkFoamToken::STRINGLIST)
         {
-          patch.type_ = vtkFoamPatch::PROCESSOR;
-          allBoundariesStartFace += patch.size_;
-        }
+          // Yes this is really needed, VTK constness is a bit odd
+          vtkStringArray& groupNames = const_cast<vtkStringArray&>(subentry->StringList());
+          const vtkIdType nGroups = groupNames.GetNumberOfValues();
 
-        // Handle inGroups which could have this type of content:
-        //   - inGroups (name1 .. nameN);
-        //   - inGroups 2(name1 name2);
-        // but never for processor boundaries (potential clutter or false positives)
-        if ((eptr = patchDict.Lookup("inGroups")) != nullptr &&
-          patch.type_ != vtkFoamPatch::PROCESSOR)
-        {
-          for (const vtkFoamEntryValue* subentry : *eptr)
+          for (vtkIdType groupi = 0; groupi < nGroups; ++groupi)
           {
-            if (subentry && subentry->GetType() == vtkFoamToken::STRINGLIST)
-            {
-              // Yes this is really needed, VTK constness is a bit odd
-              vtkStringArray& groupNames = const_cast<vtkStringArray&>(subentry->StringList());
-              const vtkIdType nGroups = groupNames.GetNumberOfValues();
-
-              for (vtkIdType groupi = 0; groupi < nGroups; ++groupi)
-              {
-                const std::string& groupName = groupNames.GetValue(groupi);
-                inGroups[groupName].push_back(patchi);
-              }
-            }
+            const std::string& groupName = groupNames.GetValue(groupi);
+            inGroups[groupName].push_back(patchi);
           }
         }
       }
     }
+  }
+
+  // Could also use HasError() for an additional sanity check
+  return true;
+}
 
-    // Handle the selection array
+//------------------------------------------------------------------------------
+// Binary search for patch index for a given face label
+// Return -1 for internal face or out-of-bounds
+vtkIdType vtkFoamBoundaries::whichPatch(vtkIdType faceIndex) const
+{
+  if (this->empty() ||                         // Safety/short-circuit
+    (faceIndex < this->front().startFace()) || // Internal mesh face
+    (faceIndex >= (this->back().endFace())))   // Out-of-bounds
+  {
+    return -1;
+  }
+
+  // Binary search like std::lower_bound, but slightly modified
+  auto first = this->begin();
+  const auto last = this->end();
+  auto count = this->size();
 
-    if (boundaryEntriesPtr)
+  while (count > 0)
+  {
+    auto iter = first;
+    auto step = count / 2;
+    iter += step;
+
+    if (iter->start_ <= faceIndex) // NB: must include start in the comparison
     {
-      // Add the internal mesh by default
-      const std::string displayName(this->RegionPrefix() + NAME_INTERNALMESH);
-      this->Parent->PatchDataArraySelection->AddArray(displayName.c_str());
-      this->InternalMeshSelectionStatus = this->Parent->GetPatchArrayStatus(displayName.c_str());
+      first = ++iter;
+      count -= step + 1;
     }
+    else
+    {
+      count = step;
+    }
+  }
+  return (first != last) ? first->index_ : -1;
+}
 
-    // Patch groups (sorted)
-    for (auto citer = this->BoundaryDict.groups.begin(), endIter = this->BoundaryDict.groups.end();
-         citer != endIter; ++citer)
+//------------------------------------------------------------------------------
+// Create field data lists and cell/point array selection lists
+int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelectionNames,
+  vtkStringArray* pointSelectionNames, vtkStringArray* lagrangianSelectionNames,
+  bool listNextTimeStep)
+{
+  vtkFoamDebug(<< "MakeMetaDataAtTimeStep (" << this->RegionName << "/" << this->ProcessorName
+               << ")\n");
+
+  if (!this->HasPolyMesh())
+  {
+    // Ignore a region without a mesh, but will normally be precluded earlier
+    vtkWarningMacro("Called MakeMetaDataAtTimeStep without a mesh.");
+    return 1;
+  }
+
+  // Change in topology or selection, may need to update boundaries
+  {
+    auto& patches = this->BoundaryDict;
+
+    // Change in topology, need to create/recreate from file
+    const bool topoChanged = (patches.timeName_.empty() ||
+      (this->PolyMeshFacesDir->GetValue(this->TimeStep) != patches.timeName_));
+
+    // User selection changed
+    const bool selectChanged = topoChanged ||
+      (this->Parent->PatchDataArraySelection->GetMTime() != this->Parent->PatchSelectionMTimeOld);
+
+    bool addInternalSelection = false;
+
+    // Read contents of polyMesh/boundary to update patch definitions
+    if (topoChanged)
     {
-      const std::string& groupName = citer->first;
-      const std::string displayName(this->RegionPrefix() + "group/" + groupName);
-      if (this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()))
+      patches.clearAll();
+      patches.timeName_ = this->PolyMeshFacesDir->GetValue(this->TimeStep);
+
+      const bool isSubRegion = !this->RegionName.empty();
+      auto boundaryEntriesPtr(this->GatherBlocks("boundary", isSubRegion));
+
+      if (boundaryEntriesPtr)
       {
-        if (this->Parent->GetPatchArrayStatus(displayName.c_str()))
+        if (!patches.update(*boundaryEntriesPtr))
         {
-          // Selected by group
-          this->BoundaryDict.enableGroup(groupName);
+          vtkErrorMacro(<< patches.error());
+          return 0;
         }
+
+        // On topology change, add the internal mesh by default
+        addInternalSelection = true;
       }
-      else
+      else if (isSubRegion)
       {
-        // Add to list with selection status == off.
-        this->Parent->PatchDataArraySelection->DisableArray(displayName.c_str());
+        // Could be missing polyMesh/boundary for sub-region
+        return 0;
       }
     }
 
-    // Individual patches
-    for (vtkFoamPatch& patch : this->BoundaryDict)
+    // The internal mesh - set/check status
+    if (selectChanged)
     {
-      const std::string& patchName = patch.name_;
+      const std::string displayName(this->RegionPrefix() + NAME_INTERNALMESH);
 
-      // always hide processor patches for decomposed cases to keep
-      // vtkAppendCompositeDataLeaves happy
-      if (patch.type_ == vtkFoamPatch::PROCESSOR && !this->ProcessorName.empty())
+      if (addInternalSelection)
       {
-        continue;
+        this->Parent->PatchDataArraySelection->AddArray(displayName.c_str());
       }
+      this->InternalMeshSelectionStatus =
+        (this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()) &&
+          this->Parent->GetPatchArrayStatus(displayName.c_str()));
+    }
+
+    // The boundary mesh - change in user selection or topology
+    if (selectChanged)
+    {
+      // Can perhaps do more with preserving old selections
+      // and check which boundaries actually changed
+      //
+      // decltype(patches.groupActive) groupActiveOld;
+      // decltype(patches.patchActive) patchActiveOld;
+      // decltype(patches.patchActiveByGroup) patchActiveByGroupOld;
+      //
+      // std::swap(groupActiveOld, patches.groupActive);
+      // std::swap(patchActiveOld, patches.patchActive);
+      // std::swap(patchActiveByGroupOld, patches.patchActiveByGroup);
+
+      // For now, simply start afresh
+      patches.clearSelections();
 
-      const std::string displayName(this->RegionPrefix() + "patch/" + patchName);
-      if (this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()))
+      // Patch groups (sorted)
+      const auto& inGroups = patches.groups;
+      for (auto citer = inGroups.begin(), endIter = inGroups.end(); citer != endIter; ++citer)
       {
-        if (this->Parent->GetPatchArrayStatus(displayName.c_str()))
+        const std::string& groupName = citer->first;
+        const std::string displayName(this->RegionPrefix() + "group/" + groupName);
+        if (this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()))
+        {
+          if (this->Parent->GetPatchArrayStatus(displayName.c_str()))
+          {
+            // Selected by group
+            patches.enableGroup(groupName);
+          }
+        }
+        else
         {
-          // Selected by patch
-          this->BoundaryDict.enablePatch(patch.index_);
+          // Add to list with selection status == off.
+          this->Parent->PatchDataArraySelection->DisableArray(displayName.c_str());
         }
       }
-      else
+
+      // Individual patches
+      for (vtkFoamPatch& patch : patches)
       {
-        // Add to list with selection status == off.
-        // The patch is added to list even if its size is zero
-        this->Parent->PatchDataArraySelection->DisableArray(displayName.c_str());
+        const std::string& patchName = patch.name_;
+
+        // always hide processor patches for decomposed cases to keep
+        // vtkAppendCompositeDataLeaves happy
+        if (patch.type_ == vtkFoamPatch::PROCESSOR && !this->ProcessorName.empty())
+        {
+          continue;
+        }
+
+        const std::string displayName(this->RegionPrefix() + "patch/" + patchName);
+        if (this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()))
+        {
+          if (this->Parent->GetPatchArrayStatus(displayName.c_str()))
+          {
+            // Selected by patch
+            patches.enablePatch(patch.index_);
+          }
+        }
+        else
+        {
+          // Add to list with selection status == off.
+          // The patch is added to list even if its size is zero
+          this->Parent->PatchDataArraySelection->DisableArray(displayName.c_str());
+        }
       }
     }
   }
@@ -5933,17 +6121,27 @@ void vtkOpenFOAMReaderPrivate::PopulatePolyMeshDirArrays()
 }
 
 //------------------------------------------------------------------------------
-// read the points file into a vtkFloatArray
+// Read the points file into a vtkFloatArray
+//
+// - sets NumPoints
+
 vtkFloatArray* vtkOpenFOAMReaderPrivate::ReadPointsFile()
 {
-  // path to points file
-  const std::string pointPath = this->CurrentTimeRegionMeshPath(this->PolyMeshPointsDir) + "points";
+  // Assume failure
+  this->NumPoints = 0;
 
   vtkFoamIOobject io(this->CasePath, this->Parent);
-  if (!io.OpenOrGzip(pointPath))
+
+  // Read polyMesh/points
   {
-    vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
-    return nullptr;
+    const std::string pointPath =
+      this->CurrentTimeRegionMeshPath(this->PolyMeshPointsDir) + "points";
+
+    if (!io.OpenOrGzip(pointPath))
+    {
+      vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
+      return nullptr;
+    }
   }
 
   vtkFloatArray* pointArray = nullptr;
@@ -5982,9 +6180,19 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::ReadPointsFile()
 }
 
 //------------------------------------------------------------------------------
-// read the faces into a vtkFoamLabelListList
-vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadFacesFile(const std::string& meshDir)
+// Read the faces into a vtkFoamLabelListList
+//
+// - sets NumFaces, clears NumInternalFaces
+//
+// Return meshFaces
+
+std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadFacesFile(
+  const std::string& meshDir)
 {
+  // Assume failure
+  this->NumFaces = 0;
+  this->NumInternalFaces = 0;
+
   vtkFoamIOobject io(this->CasePath, this->Parent);
 
   // Read polyMesh/faces
@@ -6018,13 +6226,30 @@ vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadFacesFile(const std::string&
                   << ": " << err);
     return nullptr;
   }
-  return static_cast<vtkFoamLabelListList*>(dict.Ptr());
+
+  std::unique_ptr<vtkFoamLabelListList> meshFaces(static_cast<vtkFoamLabelListList*>(dict.Ptr()));
+
+  if (meshFaces)
+  {
+    this->NumFaces = meshFaces->GetNumberOfElements();
+  }
+
+  return meshFaces;
 }
 
 //------------------------------------------------------------------------------
-// Read owner, neighbour files and create cellFaces
-vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& meshDir)
+// Read owner, neighbour files and create meshCells
+//
+// - sets NumFaces and NumInternalFaces, and NumCells
+//
+// Return meshCells
+
+std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(
+  const std::string& meshDir)
 {
+  // Assume failure
+  this->NumCells = 0;
+
   vtkFoamIOobject io(this->CasePath, this->Parent);
 
   // Read polyMesh/owner
@@ -6038,28 +6263,32 @@ vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const st
   }
   const bool use64BitLabels = io.IsLabel64();
 
-  vtkFoamEntryValue ownerDict(nullptr);
-  ownerDict.SetStreamOption(io);
-  try
   {
-    if (use64BitLabels)
+    vtkFoamEntryValue ownerDict(nullptr);
+    ownerDict.SetStreamOption(io);
+    try
     {
-      ownerDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
-        vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+      if (use64BitLabels)
+      {
+        ownerDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
+          vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+      }
+      else
+      {
+        ownerDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
+          vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+      }
     }
-    else
+    catch (const vtkFoamError& err)
     {
-      ownerDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
-        vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+      vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
+                    << ": " << err);
+      return nullptr;
     }
+    io.Close();
+
+    this->FaceOwner = static_cast<vtkDataArray*>(ownerDict.Ptr());
   }
-  catch (const vtkFoamError& err)
-  {
-    vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
-                  << ": " << err);
-    return nullptr;
-  }
-  io.Close();
 
   // Read polyMesh/neighbour
   {
@@ -6078,188 +6307,167 @@ vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const st
     return nullptr;
   }
 
-  vtkFoamEntryValue neighDict(nullptr);
-  neighDict.SetStreamOption(io);
-  try
   {
-    if (use64BitLabels)
+    vtkFoamEntryValue neighDict(nullptr);
+    neighDict.SetStreamOption(io);
+    try
     {
-      neighDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
-        vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+      if (use64BitLabels)
+      {
+        neighDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
+          vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+      }
+      else
+      {
+        neighDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
+          vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+      }
     }
-    else
+    catch (const vtkFoamError& err)
     {
-      neighDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
-        vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+      vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
+                    << ": " << err);
+      return nullptr;
     }
+    io.Close();
+
+    this->FaceNeigh = static_cast<vtkDataArray*>(neighDict.Ptr());
   }
-  catch (const vtkFoamError& err)
+
+  // Basic checks
+  const vtkDataArray& faceOwner = *this->FaceOwner;
+  const vtkDataArray& faceNeigh = *this->FaceNeigh;
+
+  const vtkIdType nFaces = faceOwner.GetNumberOfTuples();
+  const vtkIdType nInternalFaces = faceNeigh.GetNumberOfTuples();
+
+  if (nFaces < nInternalFaces)
   {
-    vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
-                  << ": " << err);
+    vtkErrorMacro(<< "Number of owner faces " << nFaces
+                  << " not equal or greater than number of neighbour faces " << nInternalFaces);
     return nullptr;
   }
 
-  // Process
+  // Set or check number of mesh faces
+  if (this->NumFaces == 0)
   {
-    this->FaceOwner = static_cast<vtkDataArray*>(ownerDict.Ptr());
-    const vtkDataArray& faceOwner = *this->FaceOwner;
-    const vtkDataArray& faceNeigh = neighDict.LabelList();
+    this->NumFaces = nFaces;
+  }
+  else if (this->NumFaces != nFaces)
+  {
+    vtkErrorMacro(<< "Expected " << this->NumFaces << " faces, but owner had " << nFaces
+                  << " faces");
+    return nullptr;
+  }
+  this->NumInternalFaces = nInternalFaces;
 
-    const vtkIdType nFaces = faceOwner.GetNumberOfTuples();
-    const vtkIdType nInternalFaces = faceNeigh.GetNumberOfTuples();
+  // The cell-faces
+  return this->CreateCellFaces(faceOwner, faceNeigh);
+}
 
-    if (nFaces < nInternalFaces)
-    {
-      vtkErrorMacro(<< "Number of owner faces " << nFaces
-                    << " not equal or greater than number of neighbour faces " << nInternalFaces);
-      return nullptr;
-    }
+//------------------------------------------------------------------------------
+// Create meshCells from owner/neighbour information
+//
+// - sets NumFaces and NumInternalFaces (again), and NumCells
+//
+// Return meshCells
+std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::CreateCellFaces(
+  const vtkDataArray& faceOwner, const vtkDataArray& faceNeigh)
+{
+  // Reset
+  this->NumCells = 0;
 
-    // Set or check number of mesh faces
-    if (this->NumFaces == 0)
-    {
-      this->NumFaces = nFaces;
-    }
-    else if (this->NumFaces != nFaces)
-    {
-      vtkWarningMacro(<< "Expected " << this->NumFaces << " faces, but owner had " << nFaces
-                      << " faces");
-      return nullptr;
-    }
-    this->NumInternalFaces = nInternalFaces;
+  const bool use64BitLabels = ::Is64BitArray(&faceOwner);
 
-    // Determine the number of cells and number of cell faces (total)
-    vtkTypeInt64 nCells = -1;
-    vtkTypeInt64 nTotalCellFaces = 0;
+  const vtkIdType nFaces = faceOwner.GetNumberOfTuples();
+  const vtkIdType nInternalFaces = faceNeigh.GetNumberOfTuples();
 
-    for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
-    {
-      const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-      if (own >= 0)
-      {
-        ++nTotalCellFaces;
-        if (nCells < own)
-        {
-          nCells = own; // <- max(nCells, own)
-        }
-      }
+  // Extra safety
+  this->NumFaces = nFaces;
+  this->NumInternalFaces = nInternalFaces;
 
-      const vtkTypeInt64 nei = GetLabelValue(&faceNeigh, facei, use64BitLabels);
-      if (nei >= 0)
-      {
-        ++nTotalCellFaces;
-        if (nCells < nei)
-        {
-          nCells = nei; // <- max(nCells, nei)
-        }
-      }
-    }
+  // Determine the number of cells and number of cell faces (total)
+  vtkTypeInt64 nCells = -1;
+  vtkTypeInt64 nTotalCellFaces = 0;
 
-    for (vtkIdType facei = nInternalFaces; facei < nFaces; ++facei)
+  for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
+  {
+    const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
+    if (own >= 0)
     {
-      const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-      if (own >= 0)
+      ++nTotalCellFaces;
+      if (nCells < own)
       {
-        ++nTotalCellFaces;
-        if (nCells < own)
-        {
-          nCells = own; // <- max(nCells, own)
-        }
+        nCells = own; // <- max(nCells, own)
       }
     }
-    ++nCells;
 
-    if (nCells == 0)
+    const vtkTypeInt64 nei = GetLabelValue(&faceNeigh, facei, use64BitLabels);
+    if (nei >= 0)
     {
-      vtkWarningMacro(<< "The mesh contains no cells");
+      ++nTotalCellFaces;
+      if (nCells < nei)
+      {
+        nCells = nei; // <- max(nCells, nei)
+      }
     }
+  }
 
-    // Set the number of cells
-    this->NumCells = static_cast<vtkIdType>(nCells);
-
-    // Create cellFaces. Avoid 32bit overflow for nTotalCellFaces
-    vtkFoamLabelListList* cells;
-    if (use64BitLabels || (VTK_TYPE_INT32_MAX < nTotalCellFaces))
-    {
-      cells = new vtkFoamLabelListList64;
-    }
-    else
+  for (vtkIdType facei = nInternalFaces; facei < nFaces; ++facei)
+  {
+    const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
+    if (own >= 0)
     {
-      cells = new vtkFoamLabelListList32;
+      ++nTotalCellFaces;
+      if (nCells < own)
+      {
+        nCells = own; // <- max(nCells, own)
+      }
     }
-    cells->ResizeExact(nCells, nTotalCellFaces);
-    cells->ResetOffsets(); // Fill offsets with zero
-
-    // Count number of faces for each cell
-    // Establish the per-cell face count
-    {
-      // Accumulate offsets into slot *above*
-      constexpr vtkIdType cellIndexOffset = 1;
+  }
+  ++nCells;
 
-      for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
-      {
-        const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-        if (own >= 0)
-        {
-          cells->IncrementOffset(cellIndexOffset + own);
-        }
+  if (nCells == 0)
+  {
+    vtkWarningMacro(<< "The mesh contains no cells");
+  }
 
-        const vtkTypeInt64 nei = GetLabelValue(&faceNeigh, facei, use64BitLabels);
-        if (nei >= 0)
-        {
-          cells->IncrementOffset(cellIndexOffset + nei);
-        }
-      }
+  // Set the number of cells
+  this->NumCells = static_cast<vtkIdType>(nCells);
 
-      for (vtkIdType facei = nInternalFaces; facei < nFaces; ++facei)
-      {
-        const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-        if (own >= 0)
-        {
-          cells->IncrementOffset(cellIndexOffset + own);
-        }
-      }
+  // Create meshCells. Avoid 32bit overflow for nTotalCellFaces
+  std::unique_ptr<vtkFoamLabelListList> meshCells;
+  if (use64BitLabels || (VTK_TYPE_INT32_MAX < nTotalCellFaces))
+  {
+    meshCells.reset(new vtkFoamLabelListList64);
+  }
+  else
+  {
+    meshCells.reset(new vtkFoamLabelListList32);
+  }
+  auto& cells = *meshCells;
 
-      // Reduce per-cell face count -> start offsets
-      vtkTypeInt64 currOffset = 0;
-      for (vtkIdType celli = 1; celli <= nCells; ++celli)
-      {
-        currOffset += cells->GetBeginOffset(celli);
-        cells->SetOffset(celli, currOffset);
-      }
-    }
+  cells.ResizeExact(nCells, nTotalCellFaces);
+  cells.ResetOffsets(); // Fill offsets with zero
 
-    // Deep copy of offsets into a temporary array
-    std::unique_ptr<vtkFoamLabelListList> tmpAddr;
-    if (cells->IsLabel64())
-    {
-      tmpAddr.reset(new vtkFoamLabelListList64);
-    }
-    else
-    {
-      tmpAddr.reset(new vtkFoamLabelListList32);
-    }
-    tmpAddr->ResizeExact(nCells, 1);
-    tmpAddr->GetOffsetsArray()->DeepCopy(cells->GetOffsetsArray());
+  // Count number of faces for each cell
+  // Establish the per-cell face count
+  {
+    // Accumulate offsets into slot *above*
+    constexpr vtkIdType cellIndexOffset = 1;
 
-    // Add face numbers to cell-faces list, using tmpAddr offsets to manage the locations
     for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
     {
       const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
       if (own >= 0)
       {
-        const vtkTypeInt64 next = tmpAddr->GetBeginOffset(own);
-        tmpAddr->IncrementOffset(own);
-        cells->SetValue(next, facei);
+        cells.IncrementOffset(cellIndexOffset + own);
       }
 
       const vtkTypeInt64 nei = GetLabelValue(&faceNeigh, facei, use64BitLabels);
       if (nei >= 0)
       {
-        const vtkTypeInt64 next = tmpAddr->GetBeginOffset(nei);
-        tmpAddr->IncrementOffset(nei);
-        cells->SetValue(next, facei);
+        cells.IncrementOffset(cellIndexOffset + nei);
       }
     }
 
@@ -6268,14 +6476,64 @@ vtkFoamLabelListList* vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const st
       const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
       if (own >= 0)
       {
-        const vtkTypeInt64 next = tmpAddr->GetBeginOffset(own);
-        tmpAddr->IncrementOffset(own);
-        cells->SetValue(next, facei);
+        cells.IncrementOffset(cellIndexOffset + own);
       }
     }
 
-    return cells;
+    // Reduce per-cell face count -> start offsets
+    vtkTypeInt64 currOffset = 0;
+    for (vtkIdType celli = 1; celli <= nCells; ++celli)
+    {
+      currOffset += cells.GetBeginOffset(celli);
+      cells.SetOffset(celli, currOffset);
+    }
+  }
+
+  // Deep copy of offsets into a temporary array
+  std::unique_ptr<vtkFoamLabelListList> tmpAddr;
+  if (cells.IsLabel64())
+  {
+    tmpAddr.reset(new vtkFoamLabelListList64);
   }
+  else
+  {
+    tmpAddr.reset(new vtkFoamLabelListList32);
+  }
+  tmpAddr->ResizeExact(nCells, 1);
+  tmpAddr->GetOffsetsArray()->DeepCopy(cells.GetOffsetsArray());
+
+  // Add face numbers to cell-faces list, using tmpAddr offsets to manage the locations
+  for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
+  {
+    const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
+    if (own >= 0)
+    {
+      const vtkTypeInt64 next = tmpAddr->GetBeginOffset(own);
+      tmpAddr->IncrementOffset(own);
+      cells.SetValue(next, facei);
+    }
+
+    const vtkTypeInt64 nei = GetLabelValue(&faceNeigh, facei, use64BitLabels);
+    if (nei >= 0)
+    {
+      const vtkTypeInt64 next = tmpAddr->GetBeginOffset(nei);
+      tmpAddr->IncrementOffset(nei);
+      cells.SetValue(next, facei);
+    }
+  }
+
+  for (vtkIdType facei = nInternalFaces; facei < nFaces; ++facei)
+  {
+    const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
+    if (own >= 0)
+    {
+      const vtkTypeInt64 next = tmpAddr->GetBeginOffset(own);
+      tmpAddr->IncrementOffset(own);
+      cells.SetValue(next, facei);
+    }
+  }
+
+  return meshCells;
 }
 
 //------------------------------------------------------------------------------
@@ -6313,31 +6571,30 @@ bool vtkOpenFOAMReaderPrivate::CheckFaceList(const vtkFoamLabelListList& faces)
 // determine cell shape and insert the cell into the mesh
 // hexahedron, prism, pyramid, tetrahedron and decompose polyhedron
 void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMesh,
-  const vtkFoamLabelListList* cellsFaces, const vtkFoamLabelListList* facesPoints,
+  const vtkFoamLabelListList& meshCells, const vtkFoamLabelListList& meshFaces,
   vtkFloatArray* pointArray, vtkIdTypeArray* additionalCells, vtkDataArray* cellList)
 {
   const bool cellList64Bit = ::Is64BitArray(cellList);
   const bool faceOwner64Bit = ::Is64BitArray(this->FaceOwner);
 
-  constexpr vtkIdType maxNPoints = 256; // assume max number of points per cell
-  vtkIdList* cellPoints = vtkIdList::New();
+  // Scratch array for inserting primitive cell points
+  constexpr vtkIdType maxNPoints = 256; // max num of points per cell
+  auto cellPoints = vtkSmartPointer<vtkIdList>::New();
   cellPoints->SetNumberOfIds(maxNPoints);
 
-  // assume max number of nPoints per face + points per cell
-  constexpr vtkIdType maxNPolyPoints = 1024;
-  vtkIdList* polyPoints = vtkIdList::New();
+  // Scratch array for inserting polyhedral faces and sizes
+  constexpr vtkIdType maxNPolyPoints = 1024; // max num of nPoints per face + points per cell
+  auto polyPoints = vtkSmartPointer<vtkIdList>::New();
   polyPoints->SetNumberOfIds(maxNPolyPoints);
 
+  // Scratch array for analyzing cell types (cell shape)
+  vtkFoamLabelListList::CellType cellFaces;
+
   const vtkIdType nCells = (cellList == nullptr ? this->NumCells : cellList->GetNumberOfTuples());
 
   // Local variable for polyhedral decomposition
   vtkIdType nAdditionalPoints = 0;
 
-  // alias
-  const vtkFoamLabelListList& facePoints = *facesPoints;
-
-  vtkFoamLabelListList::CellType cellFaces;
-
   vtkSmartPointer<vtkIdTypeArray> arrayId;
   if (cellList)
   {
@@ -6370,7 +6627,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       arrayId->SetValue(cellI, cellId);
     }
 
-    cellsFaces->GetCell(cellId, cellFaces);
+    meshCells.GetCell(cellId, cellFaces);
 
     // determine type of the cell
     // cf. src/OpenFOAM/meshes/meshShapes/cellMatcher/{hex|prism|pyr|tet}-
@@ -6381,7 +6638,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       bool allQuads = false;
       for (size_t facei = 0; facei < cellFaces.size(); ++facei)
       {
-        allQuads = (facePoints.GetSize(cellFaces[facei]) == 4);
+        allQuads = (meshFaces.GetSize(cellFaces[facei]) == 4);
         if (!allQuads)
         {
           break;
@@ -6397,7 +6654,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       int nTris = 0, nQuads = 0;
       for (size_t facei = 0; facei < cellFaces.size(); ++facei)
       {
-        const vtkIdType nPoints = facePoints.GetSize(cellFaces[facei]);
+        const vtkIdType nPoints = meshFaces.GetSize(cellFaces[facei]);
         if (nPoints == 3)
         {
           ++nTris;
@@ -6425,7 +6682,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       bool allTris = false;
       for (size_t facei = 0; facei < cellFaces.size(); ++facei)
       {
-        allTris = (facePoints.GetSize(cellFaces[facei]) == 3);
+        allTris = (meshFaces.GetSize(cellFaces[facei]) == 3);
         if (!allTris)
         {
           break;
@@ -6443,7 +6700,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       bool allEmpty = true;
       for (size_t facei = 0; facei < cellFaces.size(); ++facei)
       {
-        allEmpty = (facePoints.GetSize(cellFaces[facei]) == 0);
+        allEmpty = (meshFaces.GetSize(cellFaces[facei]) == 0);
         if (!allEmpty)
         {
           break;
@@ -6465,7 +6722,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       // get first face in correct order
       vtkTypeInt64 cellBaseFaceId = cellFaces[0];
       vtkFoamLabelListList::CellType face0Points;
-      facePoints.GetCell(cellBaseFaceId, face0Points);
+      meshFaces.GetCell(cellBaseFaceId, face0Points);
 
       if (GetLabelValue(this->FaceOwner, cellBaseFaceId, faceOwner64Bit) == cellId)
       {
@@ -6491,7 +6748,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       for (int faceI = 1; faceI < 5; faceI++) // skip face 0 and 5
       {
         vtkTypeInt64 cellFaceI = cellFaces[faceI];
-        facePoints.GetCell(cellFaceI, faceIPoints);
+        meshFaces.GetCell(cellFaceI, faceIPoints);
         int foundDup = -1, pointI = 0;
         for (; pointI < 4; pointI++) // each point
         {
@@ -6562,7 +6819,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
 
       // find the pivot point in opposite face
       vtkFoamLabelListList::CellType oppositeFacePoints;
-      facePoints.GetCell(cellOppositeFaceI, oppositeFacePoints);
+      meshFaces.GetCell(cellOppositeFaceI, oppositeFacePoints);
       int pivotPointI = 0;
       for (; pivotPointI < 4; pivotPointI++)
       {
@@ -6615,7 +6872,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       int baseFaceId = 0;
       for (int j = 0; j < 5; j++)
       {
-        if (facePoints.GetSize(cellFaces[j]) == 3)
+        if (meshFaces.GetSize(cellFaces[j]) == 3)
         {
           baseFaceId = j;
           break;
@@ -6625,7 +6882,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       // get first face in correct order
       vtkTypeInt64 cellBaseFaceId = cellFaces[baseFaceId];
       vtkFoamLabelListList::CellType face0Points;
-      facePoints.GetCell(cellBaseFaceId, face0Points);
+      meshFaces.GetCell(cellBaseFaceId, face0Points);
 
       if (GetLabelValue(this->FaceOwner, cellBaseFaceId, faceOwner64Bit) == cellId)
       {
@@ -6655,14 +6912,14 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
           continue;
         }
         vtkTypeInt64 cellFaceI = cellFaces[faceI];
-        if (facePoints.GetSize(cellFaceI) == 3)
+        if (meshFaces.GetSize(cellFaceI) == 3)
         {
           cellOppositeFaceI = cellFaceI;
         }
         // find the pivot point if still haven't
         else if (pivotPoint == -1)
         {
-          facePoints.GetCell(cellFaceI, faceIPoints);
+          meshFaces.GetCell(cellFaceI, faceIPoints);
           bool found0Dup = false;
           int pointI = 0;
           for (; pointI < 4; pointI++) // each point
@@ -6722,7 +6979,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
 
       // find the pivot point in opposite face
       vtkFoamLabelListList::CellType oppositeFacePoints;
-      facePoints.GetCell(cellOppositeFaceI, oppositeFacePoints);
+      meshFaces.GetCell(cellOppositeFaceI, oppositeFacePoints);
       int pivotPointI = 0;
       for (; pivotPointI < 3; pivotPointI++)
       {
@@ -6793,7 +7050,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
         // Find the pyramid base
         for (size_t j = 0; j < cellFaces.size(); j++)
         {
-          if (facePoints.GetSize(cellFaces[j]) == 4)
+          if (meshFaces.GetSize(cellFaces[j]) == 4)
           {
             baseFaceId = j;
             break;
@@ -6803,14 +7060,14 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
 
       const vtkTypeInt64 cellBaseFaceId = cellFaces[baseFaceId];
       vtkFoamLabelListList::CellType baseFacePoints;
-      facePoints.GetCell(cellBaseFaceId, baseFacePoints);
+      meshFaces.GetCell(cellBaseFaceId, baseFacePoints);
 
       // Take any adjacent (non-base) face
       const size_t adjacentFaceId = (baseFaceId ? 0 : 1);
       const vtkTypeInt64 cellAdjacentFaceId = cellFaces[adjacentFaceId];
 
       vtkFoamLabelListList::CellType adjacentFacePoints;
-      facePoints.GetCell(cellAdjacentFaceId, adjacentFacePoints);
+      meshFaces.GetCell(cellAdjacentFaceId, adjacentFacePoints);
 
       // Find the apex point (non-common to the base)
       // initialize with anything
@@ -6888,7 +7145,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
           // remove duplicate points from faces
           vtkTypeInt64 cellFacesJ = cellFaces[j];
           vtkFoamLabelListList::CellType faceJPoints;
-          facePoints.GetCell(cellFacesJ, faceJPoints);
+          meshFaces.GetCell(cellFacesJ, faceJPoints);
           for (size_t k = 0; k < faceJPoints.size(); k++)
           {
             vtkTypeInt64 faceJPointK = faceJPoints[k];
@@ -6928,7 +7185,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
         {
           vtkTypeInt64 cellFacesJ = cellFaces[j];
           vtkFoamLabelListList::CellType faceJPoints;
-          facePoints.GetCell(cellFacesJ, faceJPoints);
+          meshFaces.GetCell(cellFacesJ, faceJPoints);
           vtkTypeInt64 faceOwnerValue = GetLabelValue(this->FaceOwner, cellFacesJ, faceOwner64Bit);
           int flipNeighbor = (faceOwnerValue == cellId ? -1 : 1);
           size_t nTris = faceJPoints.size() % 2;
@@ -7031,15 +7288,13 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
         // get first face
         vtkTypeInt64 cellFaces0 = cellFaces[0];
         vtkFoamLabelListList::CellType baseFacePoints;
-        facePoints.GetCell(cellFaces0, baseFacePoints);
+        meshFaces.GetCell(cellFaces0, baseFacePoints);
         size_t nPoints = baseFacePoints.size();
         size_t nPolyPoints = baseFacePoints.size() + 1;
         if (nPoints > static_cast<size_t>(maxNPoints) ||
           nPolyPoints > static_cast<size_t>(maxNPolyPoints))
         {
           vtkErrorMacro(<< "Too large polyhedron at cellId = " << cellId);
-          cellPoints->Delete();
-          polyPoints->Delete();
           return;
         }
         polyPoints->SetId(0, static_cast<vtkIdType>(baseFacePoints.size()));
@@ -7072,12 +7327,10 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
           // remove duplicate points from faces
           vtkTypeInt64 cellFacesJ = cellFaces[j];
           vtkFoamLabelListList::CellType faceJPoints;
-          facePoints.GetCell(cellFacesJ, faceJPoints);
+          meshFaces.GetCell(cellFacesJ, faceJPoints);
           if (nPolyPoints >= static_cast<size_t>(maxNPolyPoints))
           {
             vtkErrorMacro(<< "Too large polyhedron at cellId = " << cellId);
-            cellPoints->Delete();
-            polyPoints->Delete();
             return;
           }
           polyPoints->SetId(
@@ -7112,8 +7365,6 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
               if (nPoints >= static_cast<size_t>(maxNPoints))
               {
                 vtkErrorMacro(<< "Too large polyhedron at cellId = " << cellId);
-                cellPoints->Delete();
-                polyPoints->Delete();
                 return;
               }
               cellPoints->SetId(
@@ -7122,8 +7373,6 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
             if (nPolyPoints >= static_cast<size_t>(maxNPolyPoints))
             {
               vtkErrorMacro(<< "Too large polyhedron at cellId = " << cellId);
-              cellPoints->Delete();
-              polyPoints->Delete();
               return;
             }
             polyPoints->SetId(
@@ -7138,14 +7387,12 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
       }
     }
   }
-  cellPoints->Delete();
-  polyPoints->Delete();
 }
 
 //------------------------------------------------------------------------------
 // derive cell types and create the internal mesh
 vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
-  const vtkFoamLabelListList* cellsFaces, const vtkFoamLabelListList* facesPoints,
+  const vtkFoamLabelListList& meshCells, const vtkFoamLabelListList& meshFaces,
   vtkFloatArray* pointArray)
 {
   // Create Mesh
@@ -7160,10 +7407,10 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
     this->NumAdditionalCells = vtkIntArray::New();
     this->AdditionalCellPoints = new vtkFoamLabelArrayVector;
 
-    vtkIdTypeArray* additionalCells = vtkIdTypeArray::New();
-    additionalCells->SetNumberOfComponents(5); // accommodates tetra or pyramid
+    auto additionalCells = vtkSmartPointer<vtkIdTypeArray>::New();
+    additionalCells->SetNumberOfComponents(5); // Accommodate tetra or pyramid
 
-    this->InsertCellsToGrid(internalMesh, cellsFaces, facesPoints, pointArray, additionalCells);
+    this->InsertCellsToGrid(internalMesh, meshCells, meshFaces, pointArray, additionalCells);
 
     // for polyhedral decomposition
     pointArray->Squeeze();
@@ -7186,11 +7433,10 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
       }
     }
     internalMesh->Squeeze();
-    additionalCells->Delete();
   }
   else
   {
-    this->InsertCellsToGrid(internalMesh, cellsFaces, facesPoints, pointArray);
+    this->InsertCellsToGrid(internalMesh, meshCells, meshFaces, pointArray);
   }
 
   // Set points for internalMesh
@@ -7205,7 +7451,7 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
 //------------------------------------------------------------------------------
 // insert faces to grid
 void vtkOpenFOAMReaderPrivate::InsertFacesToGrid(vtkPolyData* boundaryMesh,
-  const vtkFoamLabelListList* facesPoints, vtkIdType startFace, vtkIdType endFace,
+  const vtkFoamLabelListList& meshFaces, vtkIdType startFace, vtkIdType endFace,
   vtkDataArray* boundaryPointMap, vtkIdList* facePointsVtkId, vtkDataArray* labels,
   bool isLookupValue)
 {
@@ -7228,14 +7474,14 @@ void vtkOpenFOAMReaderPrivate::InsertFacesToGrid(vtkPolyData* boundaryMesh,
       }
     }
 
-    const vtkIdType nFacePoints = facesPoints->GetSize(faceId);
+    const vtkIdType nFacePoints = meshFaces.GetSize(faceId);
 
     if (isLookupValue)
     {
-      for (vtkIdType k = 0; k < nFacePoints; k++)
+      for (vtkIdType fp = 0; fp < nFacePoints; ++fp)
       {
-        const auto pointId = static_cast<vtkIdType>(facesPoints->GetValue(faceId, k));
-        facePointsVtkId->SetId(k, boundaryPointMap->LookupValue(pointId));
+        const auto pointId = static_cast<vtkIdType>(meshFaces.GetValue(faceId, fp));
+        facePointsVtkId->SetId(fp, boundaryPointMap->LookupValue(pointId));
       }
     }
     else
@@ -7243,89 +7489,65 @@ void vtkOpenFOAMReaderPrivate::InsertFacesToGrid(vtkPolyData* boundaryMesh,
       if (boundaryPointMap)
       {
         const bool bpMap64Bit = ::Is64BitArray(boundaryPointMap); // null-safe
-        for (vtkIdType k = 0; k < nFacePoints; k++)
+        for (vtkIdType fp = 0; fp < nFacePoints; ++fp)
         {
-          const auto pointId = static_cast<vtkIdType>(facesPoints->GetValue(faceId, k));
-          facePointsVtkId->SetId(k, GetLabelValue(boundaryPointMap, pointId, bpMap64Bit));
+          const auto pointId = static_cast<vtkIdType>(meshFaces.GetValue(faceId, fp));
+          facePointsVtkId->SetId(fp, GetLabelValue(boundaryPointMap, pointId, bpMap64Bit));
         }
       }
       else
       {
-        for (vtkIdType k = 0; k < nFacePoints; k++)
+        for (vtkIdType fp = 0; fp < nFacePoints; ++fp)
         {
-          const auto pointId = static_cast<vtkIdType>(facesPoints->GetValue(faceId, k));
-          facePointsVtkId->SetId(k, pointId);
+          const auto pointId = static_cast<vtkIdType>(meshFaces.GetValue(faceId, fp));
+          facePointsVtkId->SetId(fp, pointId);
         }
       }
     }
 
-    // triangle
     if (nFacePoints == 3)
     {
+      // Triangle
       bm.InsertNextCell(VTK_TRIANGLE, 3, facePointsVtkId->GetPointer(0));
     }
-    // quad
     else if (nFacePoints == 4)
     {
+      // Quad
       bm.InsertNextCell(VTK_QUAD, 4, facePointsVtkId->GetPointer(0));
     }
-    // polygon
     else
     {
+      // Polygon
       bm.InsertNextCell(VTK_POLYGON, static_cast<int>(nFacePoints), facePointsVtkId->GetPointer(0));
     }
   }
 }
 
 //------------------------------------------------------------------------------
-// returns requested boundary meshes
+// Returns requested boundary meshes
 vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
-  const vtkFoamLabelListList* facesPoints, vtkFloatArray* pointArray)
+  const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray)
 {
-  const vtkIdType nBoundaries = static_cast<vtkIdType>(this->BoundaryDict.size());
+  const auto& patches = this->BoundaryDict;
+  const vtkIdType nBoundaries = static_cast<vtkIdType>(patches.size());
 
-  // Consistency check for BoundaryDict
+  // Final consistency check for boundaries
+  if (patches.endFace() > meshFaces.GetNumberOfElements())
   {
-    vtkIdType prevEndFace = -1;
-    for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
-    {
-      const vtkFoamPatch& patch = this->BoundaryDict[patchi];
-      const vtkIdType startFace = patch.start_;
-      const vtkIdType nFaces = patch.size_;
-      if (startFace < 0 || nFaces < 0)
-      {
-        vtkErrorMacro(<< "Neither startFace " << startFace << " nor nFaces " << nFaces
-                      << " can be negative for patch " << patch.name_);
-        return nullptr;
-      }
-      if (prevEndFace >= 0 && prevEndFace != startFace)
-      {
-        vtkErrorMacro(<< "The end face number " << prevEndFace - 1 << " of patch "
-                      << this->BoundaryDict[patchi - 1].name_
-                      << " is inconsistent with start face number " << startFace << " of patch "
-                      << patch.name_);
-        return nullptr;
-      }
-      prevEndFace = startFace + nFaces;
-    }
-    if (prevEndFace > facesPoints->GetNumberOfElements())
-    {
-      vtkErrorMacro(<< "The end face number " << prevEndFace - 1 << " of the last patch "
-                    << this->BoundaryDict.back().name_ << " exceeds the number of faces "
-                    << facesPoints->GetNumberOfElements());
-      return nullptr;
-    }
+    vtkErrorMacro(<< "The boundary describes " << patches.startFace() << " to "
+                  << (patches.endFace() - 1) << " faces, but mesh only has "
+                  << meshFaces.GetNumberOfElements() << " faces");
+    return nullptr;
   }
 
   vtkMultiBlockDataSet* boundaryMesh = vtkMultiBlockDataSet::New();
 
   if (this->Parent->GetCreateCellToPoint())
   {
-    const vtkIdType boundaryStartFace =
-      (!this->BoundaryDict.empty() ? this->BoundaryDict[0].start_ : 0);
     this->AllBoundaries = vtkPolyData::New();
     this->AllBoundaries->AllocateEstimate(
-      facesPoints->GetNumberOfElements() - boundaryStartFace, 1);
+      // ==> nBoundaryFaces
+      meshFaces.GetNumberOfElements() - patches.startFace(), 1);
   }
   this->BoundaryPointMap = new vtkFoamLabelArrayVector;
 
@@ -7337,14 +7559,14 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
   vtkIdType maxNFacePoints = 0;
   for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
   {
-    const vtkFoamPatch& patch = this->BoundaryDict[patchi];
-    const vtkIdType startFace = patch.start_;
-    const vtkIdType endFace = startFace + patch.size_;
+    const vtkFoamPatch& patch = patches[patchi];
+    const vtkIdType startFace = patch.startFace();
+    const vtkIdType endFace = patch.endFace();
 
     vtkIdType nPoints = 0;
     for (vtkIdType facei = startFace; facei < endFace; ++facei)
     {
-      vtkIdType nFacePoints = facesPoints->GetSize(facei);
+      vtkIdType nFacePoints = meshFaces.GetSize(facei);
       nPoints += nFacePoints;
       if (maxNFacePoints < nFacePoints)
       {
@@ -7360,7 +7582,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
   facePointsVtkId->SetNumberOfIds(maxNFacePoints);
 
   // Use same integer width as per faces
-  const bool meshPoints64Bit = (facesPoints && facesPoints->IsLabel64());
+  const bool meshPoints64Bit = meshFaces.IsLabel64();
 
   // create initial internal point list: set all points to -1
   if (this->Parent->GetCreateCellToPoint())
@@ -7377,22 +7599,20 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     this->InternalPoints->FillComponent(0, -1);
 
     // Mark boundary points as 0
-    for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
+    for (const vtkFoamPatch& patch : patches)
     {
-      const vtkFoamPatch& patch = this->BoundaryDict[patchi];
-
       if (patch.type_ == vtkFoamPatch::PHYSICAL || patch.type_ == vtkFoamPatch::PROCESSOR)
       {
-        const vtkIdType startFace = patch.start_;
-        const vtkIdType endFace = startFace + patch.size_;
+        const vtkIdType startFace = patch.startFace();
+        const vtkIdType endFace = patch.endFace();
 
         for (vtkIdType facei = startFace; facei < endFace; ++facei)
         {
-          const vtkIdType nFacePoints = facesPoints->GetSize(facei);
+          const vtkIdType nFacePoints = meshFaces.GetSize(facei);
           for (vtkIdType pointi = 0; pointi < nFacePoints; ++pointi)
           {
             SetLabelValue(
-              this->InternalPoints, facesPoints->GetValue(facei, pointi), 0, meshPoints64Bit);
+              this->InternalPoints, meshFaces.GetValue(facei, pointi), 0, meshPoints64Bit);
           }
         }
       }
@@ -7427,16 +7647,16 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
 
   for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
   {
-    const vtkFoamPatch& patch = this->BoundaryDict[patchi];
-    const vtkIdType startFace = patch.start_;
+    const vtkFoamPatch& patch = patches[patchi];
+    const vtkIdType startFace = patch.startFace();
+    const vtkIdType endFace = patch.endFace();
     const vtkIdType nFaces = patch.size_;
-    const vtkIdType endFace = startFace + nFaces;
 
     if (this->Parent->GetCreateCellToPoint() &&
       (patch.type_ == vtkFoamPatch::PHYSICAL || patch.type_ == vtkFoamPatch::PROCESSOR))
     {
       // Add faces to AllBoundaries
-      this->InsertFacesToGrid(this->AllBoundaries, facesPoints, startFace, endFace,
+      this->InsertFacesToGrid(this->AllBoundaries, meshFaces, startFace, endFace,
         this->InternalPoints, facePointsVtkId, nullptr, false);
 
       if (!this->ProcessorName.empty())
@@ -7471,7 +7691,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     }
 
     // Skip below if not active
-    if (!this->BoundaryDict.isActive(patch.index_))
+    if (!patches.isActive(patch.index_))
     {
       continue;
     }
@@ -7498,10 +7718,10 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     vtkIdType pointi = 0;
     for (vtkIdType facei = startFace; facei < endFace; ++facei)
     {
-      const vtkIdType nFacePoints = facesPoints->GetSize(facei);
+      const vtkIdType nFacePoints = meshFaces.GetSize(facei);
       for (int fp = 0; fp < nFacePoints; ++fp)
       {
-        SetLabelValue(boundaryPointList, pointi, facesPoints->GetValue(facei, fp), meshPoints64Bit);
+        SetLabelValue(boundaryPointList, pointi, meshFaces.GetValue(facei, fp), meshPoints64Bit);
         ++pointi;
       }
     }
@@ -7543,7 +7763,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
 
     // insert faces to boundary mesh
     this->InsertFacesToGrid(
-      bm, facesPoints, startFace, endFace, bpMap, facePointsVtkId, nullptr, true);
+      bm, meshFaces, startFace, endFace, bpMap, facePointsVtkId, nullptr, true);
     bm->Delete();
     bpMap->ClearLookup();
   }
@@ -7631,7 +7851,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
 void vtkOpenFOAMReaderPrivate::TruncateFaceOwner()
 {
   const vtkIdType boundaryStartFace =
-    (!this->BoundaryDict.empty() ? this->BoundaryDict[0].start_
+    (!this->BoundaryDict.empty() ? this->BoundaryDict.startFace()
                                  : this->FaceOwner->GetNumberOfTuples());
 
   // All boundary faces
@@ -7639,6 +7859,13 @@ void vtkOpenFOAMReaderPrivate::TruncateFaceOwner()
   memmove(this->FaceOwner->GetVoidPointer(0), this->FaceOwner->GetVoidPointer(boundaryStartFace),
     static_cast<size_t>(this->FaceOwner->GetDataTypeSize() * nBoundaryFaces));
   this->FaceOwner->Resize(nBoundaryFaces);
+
+  // Has side effect on neighbour too
+  if (this->FaceNeigh != nullptr)
+  {
+    this->FaceNeigh->Delete();
+    this->FaceNeigh = nullptr;
+  }
 }
 
 //------------------------------------------------------------------------------
@@ -7663,6 +7890,8 @@ bool vtkOpenFOAMReaderPrivate::ExtendArray(T1* array, vtkIdType nTuples)
 vtkPoints* vtkOpenFOAMReaderPrivate::MoveInternalMesh(
   vtkUnstructuredGrid* internalMesh, vtkFloatArray* pointArray)
 {
+  const auto nOldPoints = internalMesh->GetPoints()->GetNumberOfPoints();
+
   if (this->Parent->GetDecomposePolyhedra())
   {
     const vtkIdType nAdditionalPoints = static_cast<vtkIdType>(this->AdditionalCellPoints->size());
@@ -7692,11 +7921,11 @@ vtkPoints* vtkOpenFOAMReaderPrivate::MoveInternalMesh(
       pointArray->InsertTuple(this->NumPoints + i, centroid);
     }
   }
-  if (internalMesh->GetPoints()->GetNumberOfPoints() != pointArray->GetNumberOfTuples())
+
+  if (nOldPoints != pointArray->GetNumberOfTuples())
   {
-    vtkErrorMacro(<< "The numbers of points for old points "
-                  << internalMesh->GetPoints()->GetNumberOfPoints() << " and new points"
-                  << pointArray->GetNumberOfTuples() << " don't match");
+    vtkErrorMacro(<< "Mismatch in number of old points (" << nOldPoints << ") and new points ("
+                  << pointArray->GetNumberOfTuples() << ')');
     return nullptr;
   }
 
@@ -7738,6 +7967,7 @@ void vtkOpenFOAMReaderPrivate::MoveBoundaryMesh(
       vtkPolyData* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
       bm->SetPoints(boundaryPoints);
       boundaryPoints->Delete();
+
       ++activeBoundaryIndex;
     }
   }
@@ -8316,10 +8546,12 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
     }
   }
 
+  const auto& patches = this->BoundaryDict;
+
   const bool faceOwner64Bit = ::Is64BitArray(this->FaceOwner);
 
   unsigned int activeBoundaryIndex = 0;
-  for (const vtkFoamPatch& patch : this->BoundaryDict)
+  for (const vtkFoamPatch& patch : patches)
   {
     const vtkIdType nFaces = patch.size_;
 
@@ -8384,8 +8616,11 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
       }
     }
 
-    // Relative start
-    const vtkIdType boundaryStartFace = patch.start_ - this->BoundaryDict[0].start_;
+    // Relative start into the FaceOwner list, which may have been truncated (boundaries only)
+    // or have its original length
+
+    const vtkIdType boundaryStartFace = patch.start_ -
+      (this->FaceOwner->GetNumberOfTuples() < this->NumFaces ? patches.startFace() : 0);
 
     if (vData == nullptr)
     {
@@ -8450,7 +8685,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
       }
     }
 
-    if (this->BoundaryDict.isActive(patch.index_))
+    if (patches.isActive(patch.index_))
     {
       vtkPolyData* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
       ::AddArrayToFieldData(bm->GetCellData(), vData, io.GetObjectName(), dimString);
@@ -8613,11 +8848,15 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
     return;
   }
 
+  // Boundary
   // Use patch-internal values as boundary values
+  const auto& patches = this->BoundaryDict;
+
   unsigned int activeBoundaryIndex = 0;
-  for (const vtkFoamPatch& patch : this->BoundaryDict)
+
+  for (const vtkFoamPatch& patch : patches)
   {
-    if (this->BoundaryDict.isActive(patch.index_))
+    if (patches.isActive(patch.index_))
     {
       vtkFloatArray* vData = vtkFloatArray::New();
       vtkDataArray* bpMap = this->BoundaryPointMap->operator[](activeBoundaryIndex);
@@ -8634,6 +8873,7 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
       vtkPolyData* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
       ::AddArrayToFieldData(bm->GetPointData(), vData, io.GetObjectName(), dimString);
       vData->Delete();
+
       ++activeBoundaryIndex;
     }
   }
@@ -8825,9 +9065,9 @@ std::unique_ptr<vtkFoamDict> vtkOpenFOAMReaderPrivate::GatherBlocks(
 
 //------------------------------------------------------------------------------
 // Populate cell zone(s) mesh
+
 bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
-  const vtkFoamLabelListList* cellsFaces, const vtkFoamLabelListList* facesPoints,
-  vtkPoints* points)
+  const vtkFoamLabelListList& meshCells, const vtkFoamLabelListList& meshFaces, vtkPoints* points)
 {
   constexpr const char* const zonePrefix = "cellZone";
   constexpr const char* const zoneTypeName = "cellZones";
@@ -8893,7 +9133,7 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     zm->Allocate(nLabels);
 
     // Insert cells
-    this->InsertCellsToGrid(zm, cellsFaces, facesPoints, nullptr, nullptr, &labels);
+    this->InsertCellsToGrid(zm, meshCells, meshFaces, nullptr, nullptr, &labels);
 
     // Set points for zone
     zm->SetPoints(points);
@@ -8907,8 +9147,9 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
 //------------------------------------------------------------------------------
 // Populate face zone(s) mesh
+
 bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
-  vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList* facesPoints, vtkPoints* points)
+  vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList& meshFaces, vtkPoints* points)
 {
   constexpr const char* const zonePrefix = "faceZone";
   constexpr const char* const zoneTypeName = "faceZones";
@@ -8978,7 +9219,7 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
     vtkIdType maxNFacePoints = 0;
     for (vtkIdType labeli = 0; labeli < nLabels; ++labeli)
     {
-      vtkIdType nFacePoints = facesPoints->GetSize(GetLabelValue(&labels, labeli, use64BitLabels));
+      vtkIdType nFacePoints = meshFaces.GetSize(GetLabelValue(&labels, labeli, use64BitLabels));
       if (maxNFacePoints < nFacePoints)
       {
         maxNFacePoints = nFacePoints;
@@ -8988,7 +9229,7 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
     facePointsVtkId->SetNumberOfIds(maxNFacePoints);
 
     // Insert faces
-    this->InsertFacesToGrid(zm, facesPoints, 0, nLabels, nullptr, facePointsVtkId, &labels, false);
+    this->InsertFacesToGrid(zm, meshFaces, 0, nLabels, nullptr, facePointsVtkId, &labels, false);
     facePointsVtkId->Delete();
 
     // Set points for zone
@@ -9003,6 +9244,7 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
 
 //------------------------------------------------------------------------------
 // Populate point zone(s) mesh
+
 bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh, vtkPoints* points)
 {
   constexpr const char* const zonePrefix = "pointZone";
@@ -9199,36 +9441,37 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     this->ClearZoneMeshes();
   }
 
-  vtkFoamLabelListList* facePoints = nullptr;
+  // Mesh primitives
+  std::unique_ptr<vtkFoamLabelListList> meshCells;
+  std::unique_ptr<vtkFoamLabelListList> meshFaces;
+
   std::string meshDir;
   if (createEulerians && (recreateInternalMesh || recreateBoundaryMesh))
   {
     // Path to polyMesh/ files
     meshDir = this->CurrentTimeRegionMeshPath(this->PolyMeshFacesDir);
 
-    // Create the faces vector
-    facePoints = this->ReadFacesFile(meshDir);
-    if (facePoints == nullptr)
+    // Read polyMesh/faces, create the list of faces, set the number of faces
+    meshFaces = this->ReadFacesFile(meshDir);
+    if (!meshFaces)
     {
       return 0;
     }
     this->Parent->UpdateProgress(0.2);
   }
 
-  // Set the number of faces
-  if (facePoints != nullptr)
-  {
-    this->NumFaces = facePoints->GetNumberOfElements();
-  }
-
-  vtkFoamLabelListList* cellFaces = nullptr;
   if (createEulerians && recreateInternalMesh)
   {
-    // Read owner/neighbour, create FaceOwner and cellFaces vectors
-    cellFaces = this->ReadOwnerNeighbourFiles(meshDir);
-    if (cellFaces == nullptr)
+    // Read polyMesh/{owner,neighbour}, create FaceOwner/FaceNeigh and meshCells vectors
+    meshCells = this->ReadOwnerNeighbourFiles(meshDir);
+    if (this->FaceNeigh)
+    {
+      // Transitional code - do not yet use neighbour information
+      this->FaceNeigh->Delete();
+      this->FaceNeigh = nullptr;
+    }
+    if (!meshCells)
     {
-      delete facePoints;
       return 0;
     }
     this->Parent->UpdateProgress(0.3);
@@ -9240,13 +9483,11 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
       (recreateBoundaryMesh && !recreateInternalMesh && this->InternalMesh == nullptr) ||
       moveInternalPoints || moveBoundaryPoints))
   {
-    // get the points
+    // Read polyMesh/points, set the number of faces
     pointArray = this->ReadPointsFile();
     if ((pointArray == nullptr && recreateInternalMesh) ||
-      (facePoints != nullptr && !this->CheckFaceList(*facePoints)))
+      (meshFaces && !this->CheckFaceList(*meshFaces)))
     {
-      delete cellFaces;
-      delete facePoints;
       return 0;
     }
     this->Parent->UpdateProgress(0.4);
@@ -9259,85 +9500,86 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     const std::string displayName(this->RegionPrefix() + NAME_INTERNALMESH);
     if (this->Parent->GetPatchArrayStatus(displayName.c_str()))
     {
-      this->InternalMesh = this->MakeInternalMesh(cellFaces, facePoints, pointArray);
+      this->InternalMesh = this->MakeInternalMesh(*meshCells, *meshFaces, pointArray);
     }
+  }
 
-    // Read and construct zones
-    if (this->Parent->GetReadZones())
+  // Read and construct zones
+  if (createEulerians && recreateInternalMesh && this->Parent->GetReadZones())
+  {
+    vtkPoints* points = nullptr;
+    if (this->InternalMesh != nullptr)
     {
-      vtkPoints* points = nullptr;
-      if (this->InternalMesh != nullptr)
-      {
-        points = this->InternalMesh->GetPoints();
-      }
-      else
-      {
-        points = vtkPoints::New();
-        points->SetData(pointArray);
-      }
+      points = this->InternalMesh->GetPoints();
+    }
+    else
+    {
+      points = vtkPoints::New();
+      points->SetData(pointArray);
+    }
 
-      this->PointZoneMesh = vtkMultiBlockDataSet::New();
-      if (!this->GetPointZoneMesh(this->PointZoneMesh, points))
-      {
-        this->ClearZoneMeshes();
-        delete cellFaces;
-        delete facePoints;
-        if (this->InternalMesh == nullptr)
-        {
-          points->Delete();
-        }
-        pointArray->Delete();
-        return 0;
-      }
-      if (this->PointZoneMesh->GetNumberOfBlocks() == 0)
+    this->PointZoneMesh = vtkMultiBlockDataSet::New();
+    if (!this->GetPointZoneMesh(this->PointZoneMesh, points))
+    {
+      this->ClearZoneMeshes();
+      if (this->InternalMesh == nullptr)
       {
-        this->PointZoneMesh->Delete();
-        this->PointZoneMesh = nullptr;
+        points->Delete();
       }
+      pointArray->Delete();
+      return 0;
+    }
+    if (this->PointZoneMesh->GetNumberOfBlocks() == 0)
+    {
+      this->PointZoneMesh->Delete();
+      this->PointZoneMesh = nullptr;
+    }
 
-      this->FaceZoneMesh = vtkMultiBlockDataSet::New();
-      if (!this->GetFaceZoneMesh(this->FaceZoneMesh, facePoints, points))
-      {
-        this->ClearZoneMeshes();
-        delete cellFaces;
-        delete facePoints;
-        if (this->InternalMesh == nullptr)
-        {
-          points->Delete();
-        }
-        pointArray->Delete();
-        return 0;
-      }
-      if (this->FaceZoneMesh->GetNumberOfBlocks() == 0)
+    this->FaceZoneMesh = vtkMultiBlockDataSet::New();
+    if (!this->GetFaceZoneMesh(this->FaceZoneMesh, *meshFaces, points))
+    {
+      this->ClearZoneMeshes();
+      if (this->InternalMesh == nullptr)
       {
-        this->FaceZoneMesh->Delete();
-        this->FaceZoneMesh = nullptr;
+        points->Delete();
       }
+      pointArray->Delete();
+      return 0;
+    }
+    if (this->FaceZoneMesh->GetNumberOfBlocks() == 0)
+    {
+      this->FaceZoneMesh->Delete();
+      this->FaceZoneMesh = nullptr;
+    }
 
-      this->CellZoneMesh = vtkMultiBlockDataSet::New();
-      if (!this->GetCellZoneMesh(this->CellZoneMesh, cellFaces, facePoints, points))
-      {
-        this->ClearZoneMeshes();
-        delete cellFaces;
-        delete facePoints;
-        if (this->InternalMesh == nullptr)
-        {
-          points->Delete();
-        }
-        pointArray->Delete();
-        return 0;
-      }
-      if (this->CellZoneMesh->GetNumberOfBlocks() == 0)
-      {
-        this->CellZoneMesh->Delete();
-        this->CellZoneMesh = nullptr;
-      }
+    this->CellZoneMesh = vtkMultiBlockDataSet::New();
+    if (!this->GetCellZoneMesh(this->CellZoneMesh, *meshCells, *meshFaces, points))
+    {
+      this->ClearZoneMeshes();
       if (this->InternalMesh == nullptr)
       {
         points->Delete();
       }
+      pointArray->Delete();
+      return 0;
     }
-    delete cellFaces;
+    if (this->CellZoneMesh->GetNumberOfBlocks() == 0)
+    {
+      this->CellZoneMesh->Delete();
+      this->CellZoneMesh = nullptr;
+    }
+    if (this->InternalMesh == nullptr)
+    {
+      points->Delete();
+    }
+  }
+
+  // Don't need meshCells beyond here
+  meshCells.reset(nullptr);
+
+  // Only need boundary face owners beyond here
+  if (createEulerians && recreateInternalMesh)
+  {
     this->TruncateFaceOwner();
   }
 
@@ -9352,11 +9594,10 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     {
       boundaryPointArray = static_cast<vtkFloatArray*>(this->InternalMesh->GetPoints()->GetData());
     }
-    // create boundary mesh
-    this->BoundaryMesh = this->MakeBoundaryMesh(facePoints, boundaryPointArray);
+    // Create boundary mesh
+    this->BoundaryMesh = this->MakeBoundaryMesh(*meshFaces, boundaryPointArray);
     if (this->BoundaryMesh == nullptr)
     {
-      delete facePoints;
       if (pointArray != nullptr)
       {
         pointArray->Delete();
@@ -9365,7 +9606,8 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     }
   }
 
-  delete facePoints;
+  // Don't need meshFaces beyond here
+  meshFaces.reset(nullptr);
 
   // if only point coordinates change refresh point vector
   if (createEulerians && moveInternalPoints)
@@ -9508,7 +9750,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   }
 
   // Set boundary meshes/data as output
-  if (this->BoundaryMesh != nullptr && this->BoundaryMesh->GetNumberOfBlocks() > 0)
+  if (this->BoundaryMesh != nullptr && this->BoundaryMesh->GetNumberOfBlocks())
   {
     ::AppendBlock(output, this->BoundaryMesh, "boundary");
   }
@@ -9516,7 +9758,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   // Set lagrangian mesh as output
   if (lagrangianMesh != nullptr)
   {
-    if (lagrangianMesh->GetNumberOfBlocks() > 0)
+    if (lagrangianMesh->GetNumberOfBlocks())
     {
       ::AppendBlock(output, lagrangianMesh, "lagrangian");
     }
-- 
GitLab


From af7ddb92298c8b01c968c82eb53c152972ccfc64 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 29 Jan 2021 18:46:09 +0100
Subject: [PATCH 08/36] openfoam: simplify internal/boundary dictionary field
 processing

- dictionary lookups first, followed by sanity checks.
  This centralizes the failure handling, and leaves the data
  in better shape for subsequent processing.

- better isolation of the decompose polyhedra logic to improve the
  overview of the logic, but also to make potential removal or
  disabling easier in the future.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 802 +++++++++++++++++-------------
 1 file changed, 449 insertions(+), 353 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 7dcc874e674..811e12ac1ef 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -78,6 +78,9 @@
 // This could also be made part of the GUI properties
 #define VTK_FOAMFILE_IGNORE_FIELD_RESTART 0
 
+// Support extra decomposition of polyhedral cells
+#define VTK_FOAMFILE_DECOMPOSE_POLYHEDRA 1
+
 //------------------------------------------------------------------------------
 // Developer option to debug the reader states
 #define VTK_FOAMFILE_DEBUG 0
@@ -855,11 +858,13 @@ private:
   vtkMultiBlockDataSet* FaceZoneMesh;
   vtkMultiBlockDataSet* PointZoneMesh;
 
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   // For polyhedral decomposition
-  int NumTotalAdditionalCells;
+  vtkIdType NumTotalAdditionalCells;
   vtkIdTypeArray* AdditionalCellIds;
   vtkIntArray* NumAdditionalCells;
   vtkFoamLabelArrayVector* AdditionalCellPoints;
+#endif
 
   // Constructor and destructor are kept private
   vtkOpenFOAMReaderPrivate();
@@ -933,8 +938,12 @@ private:
 
   // Create volume mesh
   void InsertCellsToGrid(vtkUnstructuredGrid*, const vtkFoamLabelListList& meshCells,
-    const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray,
-    vtkIdTypeArray* additionalCellIds = nullptr, vtkDataArray* cellLabels = nullptr);
+    const vtkFoamLabelListList& meshFaces, vtkDataArray* cellLabels = nullptr
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
+    ,
+    vtkIdTypeArray* additionalCellIds = nullptr, vtkFloatArray* pointArray = nullptr
+#endif
+  );
 
   vtkUnstructuredGrid* MakeInternalMesh(const vtkFoamLabelListList& meshCells,
     const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
@@ -945,7 +954,8 @@ private:
   template <typename T1, typename T2>
   bool ExtendArray(T1*, vtkIdType);
 
-  vtkMultiBlockDataSet* MakeBoundaryMesh(const vtkFoamLabelListList& meshFaces, vtkFloatArray*);
+  vtkMultiBlockDataSet* MakeBoundaryMesh(
+    const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
 
   void TruncateFaceOwner();
 
@@ -4956,11 +4966,13 @@ vtkOpenFOAMReaderPrivate::vtkOpenFOAMReaderPrivate()
   this->FaceZoneMesh = nullptr;
   this->CellZoneMesh = nullptr;
 
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   // For polyhedral decomposition
   this->NumTotalAdditionalCells = 0;
   this->AdditionalCellIds = nullptr;
   this->NumAdditionalCells = nullptr;
   this->AdditionalCellPoints = nullptr;
+#endif
 
   this->Parent = nullptr;
 }
@@ -4999,6 +5011,7 @@ void vtkOpenFOAMReaderPrivate::ClearInternalMeshes()
     this->InternalMesh = nullptr;
   }
 
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   // For polyhedral decomposition
   this->NumTotalAdditionalCells = 0;
   if (this->AdditionalCellIds != nullptr)
@@ -5014,6 +5027,7 @@ void vtkOpenFOAMReaderPrivate::ClearInternalMeshes()
 
   delete this->AdditionalCellPoints;
   this->AdditionalCellPoints = nullptr;
+#endif
 }
 
 void vtkOpenFOAMReaderPrivate::ClearZoneMeshes()
@@ -6570,9 +6584,14 @@ bool vtkOpenFOAMReaderPrivate::CheckFaceList(const vtkFoamLabelListList& faces)
 //------------------------------------------------------------------------------
 // determine cell shape and insert the cell into the mesh
 // hexahedron, prism, pyramid, tetrahedron and decompose polyhedron
-void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMesh,
-  const vtkFoamLabelListList& meshCells, const vtkFoamLabelListList& meshFaces,
-  vtkFloatArray* pointArray, vtkIdTypeArray* additionalCells, vtkDataArray* cellList)
+void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
+  vtkUnstructuredGrid* internalMesh, const vtkFoamLabelListList& meshCells,
+  const vtkFoamLabelListList& meshFaces, vtkDataArray* cellList
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
+  ,
+  vtkIdTypeArray* additionalCells, vtkFloatArray* pointArray
+#endif
+)
 {
   const bool cellList64Bit = ::Is64BitArray(cellList);
   const bool faceOwner64Bit = ::Is64BitArray(this->FaceOwner);
@@ -6592,18 +6611,20 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
 
   const vtkIdType nCells = (cellList == nullptr ? this->NumCells : cellList->GetNumberOfTuples());
 
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   // Local variable for polyhedral decomposition
   vtkIdType nAdditionalPoints = 0;
 
+  if (additionalCells && cellList) // sanity check
+  {
+    vtkErrorMacro(<< "Decompose polyhedral is not supported on mesh subset");
+    return;
+  }
+#endif
+
   vtkSmartPointer<vtkIdTypeArray> arrayId;
   if (cellList)
   {
-    if (additionalCells) // sanity check
-    {
-      vtkErrorMacro(<< "Decompose polyhedral is not supported on mesh subset");
-      return;
-    }
-
     // create array holding cell id only on zone mesh
     arrayId = vtkSmartPointer<vtkIdTypeArray>::New();
     arrayId->SetName("CellId");
@@ -7125,8 +7146,11 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
     // OFpolyhedron || vtkPolyhedron
     if (cellType == VTK_POLYHEDRON)
     {
-      if (additionalCells != nullptr) // decompose into tets and pyramids
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
+      if (additionalCells != nullptr)
       {
+        // Decompose into tets and pyramids
+
         // calculate cell centroid and insert it to point list
         vtkDataArray* polyCellPoints;
         if (cellList64Bit)
@@ -7138,8 +7162,9 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
           polyCellPoints = vtkTypeInt32Array::New();
         }
         this->AdditionalCellPoints->push_back(polyCellPoints);
-        float centroid[3];
-        centroid[0] = centroid[1] = centroid[2] = 0.0F;
+
+        double centroid[3];
+        centroid[0] = centroid[1] = centroid[2] = 0; // zero the contents
         for (size_t j = 0; j < cellFaces.size(); j++)
         {
           // remove duplicate points from faces
@@ -7148,12 +7173,12 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
           meshFaces.GetCell(cellFacesJ, faceJPoints);
           for (size_t k = 0; k < faceJPoints.size(); k++)
           {
-            vtkTypeInt64 faceJPointK = faceJPoints[k];
+            const vtkTypeInt64 faceJPointK = faceJPoints[k];
             bool foundDup = false;
             for (vtkIdType l = 0; l < polyCellPoints->GetDataSize(); l++)
             {
-              vtkTypeInt64 polyCellPoint = GetLabelValue(polyCellPoints, l, cellList64Bit);
-              if (polyCellPoint == faceJPointK)
+              const vtkTypeInt64 polyCellPointi = GetLabelValue(polyCellPoints, l, cellList64Bit);
+              if (polyCellPointi == faceJPointK)
               {
                 foundDup = true;
                 break; // look no more
@@ -7162,18 +7187,20 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
             if (!foundDup)
             {
               AppendLabelValue(polyCellPoints, faceJPointK, cellList64Bit);
-              float* pointK = pointArray->GetPointer(3 * faceJPointK);
-              centroid[0] += pointK[0];
-              centroid[1] += pointK[1];
-              centroid[2] += pointK[2];
+              const float* tuple = pointArray->GetPointer(3 * faceJPointK);
+              centroid[0] += static_cast<double>(tuple[0]);
+              centroid[1] += static_cast<double>(tuple[1]);
+              centroid[2] += static_cast<double>(tuple[2]);
             }
           }
         }
         polyCellPoints->Squeeze();
-        const float weight = 1.0F / static_cast<float>(polyCellPoints->GetDataSize());
-        centroid[0] *= weight;
-        centroid[1] *= weight;
-        centroid[2] *= weight;
+        {
+          const double weight = 1.0 / static_cast<double>(polyCellPoints->GetDataSize());
+          centroid[0] *= weight;
+          centroid[1] *= weight;
+          centroid[2] *= weight;
+        }
         pointArray->InsertNextTuple(centroid);
 
         // polyhedron decomposition.
@@ -7200,14 +7227,14 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
           // e. g. autoRefineMesh
           if (faceJPoints.size() >= 5 && nTris)
           {
-            float *point0, *point1, *point2;
-            point0 = pointArray->GetPointer(3 * faceJPoints[faceJPoints.size() - 1]);
-            point1 = pointArray->GetPointer(3 * faceJPoints[0]);
-            point2 = pointArray->GetPointer(3 * faceJPoints[faceJPoints.size() - 2]);
+            const float* point0 = pointArray->GetPointer(3 * faceJPoints[faceJPoints.size() - 1]);
+            const float* point1 = pointArray->GetPointer(3 * faceJPoints[0]);
+            const float* point2 = pointArray->GetPointer(3 * faceJPoints[faceJPoints.size() - 2]);
             float vsizeSqr1 = 0.0F, vsizeSqr2 = 0.0F, dotProduct = 0.0F;
             for (int i = 0; i < 3; i++)
             {
-              const float v1 = point1[i] - point0[i], v2 = point2[i] - point0[i];
+              const float v1 = point1[i] - point0[i];
+              const float v2 = point2[i] - point0[i];
               vsizeSqr1 += v1 * v1;
               vsizeSqr2 += v2 * v2;
               dotProduct += v1 * v2;
@@ -7283,8 +7310,11 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(vtkUnstructuredGrid* internalMe
         this->NumAdditionalCells->InsertNextValue(nAdditionalCells);
         this->NumTotalAdditionalCells += nAdditionalCells;
       }
-      else // don't decompose; use VTK_POLYHEDRON
+      else
+#endif // VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
       {
+        // Not decomposed - using VTK_POLYHEDRON
+
         // get first face
         vtkTypeInt64 cellFaces0 = cellFaces[0];
         vtkFoamLabelListList::CellType baseFacePoints;
@@ -7399,6 +7429,7 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
   vtkUnstructuredGrid* internalMesh = vtkUnstructuredGrid::New();
   internalMesh->Allocate(this->NumCells);
 
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   if (this->Parent->GetDecomposePolyhedra())
   {
     // For polyhedral decomposition
@@ -7410,16 +7441,17 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
     auto additionalCells = vtkSmartPointer<vtkIdTypeArray>::New();
     additionalCells->SetNumberOfComponents(5); // Accommodate tetra or pyramid
 
-    this->InsertCellsToGrid(internalMesh, meshCells, meshFaces, pointArray, additionalCells);
+    this->InsertCellsToGrid(
+      internalMesh, meshCells, meshFaces, nullptr, additionalCells, pointArray);
 
-    // for polyhedral decomposition
+    // For polyhedral decomposition
     pointArray->Squeeze();
     this->AdditionalCellIds->Squeeze();
     this->NumAdditionalCells->Squeeze();
     additionalCells->Squeeze();
 
-    // insert decomposed cells into mesh
-    const int nComponents = additionalCells->GetNumberOfComponents();
+    // Insert decomposed cells into mesh
+    const int nComponents = additionalCells->GetNumberOfComponents(); // Should still be 5
     const vtkIdType nAdditionalCells = additionalCells->GetNumberOfTuples();
     for (vtkIdType i = 0; i < nAdditionalCells; i++)
     {
@@ -7435,8 +7467,9 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
     internalMesh->Squeeze();
   }
   else
+#endif // VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   {
-    this->InsertCellsToGrid(internalMesh, meshCells, meshFaces, pointArray);
+    this->InsertCellsToGrid(internalMesh, meshCells, meshFaces);
   }
 
   // Set points for internalMesh
@@ -7892,35 +7925,42 @@ vtkPoints* vtkOpenFOAMReaderPrivate::MoveInternalMesh(
 {
   const auto nOldPoints = internalMesh->GetPoints()->GetNumberOfPoints();
 
-  if (this->Parent->GetDecomposePolyhedra())
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
+  if (this->Parent->GetDecomposePolyhedra() && this->AdditionalCellPoints &&
+    !this->AdditionalCellPoints->empty())
   {
-    const vtkIdType nAdditionalPoints = static_cast<vtkIdType>(this->AdditionalCellPoints->size());
-    this->ExtendArray<vtkFloatArray, float>(pointArray, this->NumPoints + nAdditionalPoints);
+    const auto& addCellPoints = *this->AdditionalCellPoints;
+    const vtkIdType nAddPoints = static_cast<vtkIdType>(addCellPoints.size());
+    this->ExtendArray<vtkFloatArray, float>(pointArray, this->NumPoints + nAddPoints);
 
-    const bool cellPoints64Bit =
-      (nAdditionalPoints > 0 && ::Is64BitArray(this->AdditionalCellPoints->front()));
+    const bool cellPoints64Bit = ::Is64BitArray(this->AdditionalCellPoints->front());
 
-    for (int i = 0; i < nAdditionalPoints; i++)
+    double centroid[3];
+    for (vtkIdType i = 0, newPointi = this->NumPoints; i < nAddPoints; ++i, ++newPointi)
     {
-      vtkDataArray* polyCellPoints = this->AdditionalCellPoints->operator[](i);
-      float centroid[3];
-      centroid[0] = centroid[1] = centroid[2] = 0.0F;
-      vtkIdType nCellPoints = polyCellPoints->GetDataSize();
+      vtkDataArray* polyCellPoints = addCellPoints[i];
+      const vtkIdType nCellPoints = polyCellPoints->GetDataSize();
+
+      centroid[0] = centroid[1] = centroid[2] = 0; // zero contents
       for (vtkIdType j = 0; j < nCellPoints; j++)
       {
-        float* pointK =
-          pointArray->GetPointer(3 * GetLabelValue(polyCellPoints, j, cellPoints64Bit));
-        centroid[0] += pointK[0];
-        centroid[1] += pointK[1];
-        centroid[2] += pointK[2];
+        const vtkTypeInt64 polyCellPointi = GetLabelValue(polyCellPoints, j, cellPoints64Bit);
+        const float* tuple = pointArray->GetPointer(3 * polyCellPointi);
+        centroid[0] += static_cast<double>(tuple[0]);
+        centroid[1] += static_cast<double>(tuple[1]);
+        centroid[2] += static_cast<double>(tuple[2]);
       }
-      const float weight = (nCellPoints ? 1.0F / static_cast<float>(nCellPoints) : 0.0F);
-      centroid[0] *= weight;
-      centroid[1] *= weight;
-      centroid[2] *= weight;
-      pointArray->InsertTuple(this->NumPoints + i, centroid);
+      if (nCellPoints)
+      {
+        const double weight = 1.0 / static_cast<double>(nCellPoints);
+        centroid[0] *= weight;
+        centroid[1] *= weight;
+        centroid[2] *= weight;
+      }
+      pointArray->InsertTuple(newPointi, centroid);
     }
   }
+#endif // VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
 
   if (nOldPoints != pointArray->GetNumberOfTuples())
   {
@@ -8397,9 +8437,14 @@ std::string vtkOpenFOAMReaderPrivate::ConstructDimensions(const vtkFoamDict& dic
 void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   const std::string& varName, bool isInternalField)
 {
+  // Where to map data
   vtkUnstructuredGrid* internalMesh = this->InternalMesh;
   vtkMultiBlockDataSet* boundaryMesh = this->BoundaryMesh;
 
+  // Boundary information
+  const auto& patches = this->BoundaryDict;
+  const bool faceOwner64Bit = ::Is64BitArray(this->FaceOwner);
+
   vtkFoamIOobject io(this->CasePath, this->Parent);
   vtkFoamDict dict;
   if (!this->ReadFieldFile(io, dict, varName, this->Parent->CellDataArraySelection))
@@ -8420,21 +8465,26 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   // Eg, from "volScalarField" or "volScalarField::Internal" -> SCALAR_TYPE
   const auto fieldDataType(vtkFoamTypes::ToEnum(io.GetClassName(), 3));
 
-  // The internalField
-  vtkFoamEntry* iEntry = nullptr;
+  // -------------------------
+  // Handle dictionary lookups first
+
+  // The "dimensions" entry - stringify
+  const std::string dimString(this->ConstructDimensions(dict));
+
+  // The "internalField" entry, or "value" for Dimensioned field
+  vtkFoamEntry* ifieldEntry = nullptr;
   {
     const std::string entryName = (isInternalField ? "value" : "internalField");
 
-    iEntry = dict.Lookup(entryName);
-    if (iEntry == nullptr)
+    ifieldEntry = dict.Lookup(entryName);
+    if (ifieldEntry == nullptr)
     {
       vtkErrorMacro(<< entryName << " not found in " << io.GetFileName());
       return;
     }
-
-    if (iEntry->FirstValue().GetType() == vtkFoamToken::EMPTYLIST)
+    else if (ifieldEntry->FirstValue().GetType() == vtkFoamToken::EMPTYLIST)
     {
-      if (this->NumCells > 0)
+      if (this->NumCells)
       {
         vtkErrorMacro(<< entryName << " of " << io.GetFileName() << " is empty");
       }
@@ -8442,312 +8492,327 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
     }
   }
 
-  vtkFloatArray* iData = this->FillField(*iEntry, this->NumCells, io, fieldDataType);
-  if (iData == nullptr)
+  // The "boundaryField" entry
+  const vtkFoamEntry* bfieldEntries = nullptr;
+  if (!isInternalField)
   {
-    return;
+    bfieldEntries = dict.Lookup("boundaryField");
+    if (bfieldEntries == nullptr)
+    {
+      vtkWarningMacro(<< "boundaryField not found in " << io.GetFileName()
+                      << " at time = " << this->TimeNames->GetValue(this->TimeStep));
+      return;
+    }
   }
 
-  const std::string dimString(this->ConstructDimensions(dict));
-
-  vtkFloatArray *acData = nullptr, *ctpData = nullptr;
+  // -------------------------
 
-  if (this->Parent->GetCreateCellToPoint())
+  // Generate internal field data
+  vtkFloatArray* iData = this->FillField(*ifieldEntry, this->NumCells, io, fieldDataType);
+  if (iData == nullptr)
   {
-    acData = vtkFloatArray::New();
-    acData->SetNumberOfComponents(iData->GetNumberOfComponents());
-    acData->SetNumberOfTuples(this->AllBoundaries->GetNumberOfCells());
+    return;
   }
+  else if (iData->GetSize() == 0)
+  {
+    // Determined that there are no cells. Ignore the field
+    iData->Delete();
+    return;
+  }
+
+  // Invariant for this field
+  const int nComponents = iData->GetNumberOfComponents();
+
+  // The cell-to-point interpolated data for cells
+  vtkFloatArray* ctpData = nullptr;
 
-  if (iData->GetSize() > 0)
+  // Add field only if internal Mesh exists (skip if not selected).
+  // Note we still need to read internalField even if internal mesh is
+  // not selected, since boundaries without value entries may refer to
+  // the internalField.
+  if (internalMesh != nullptr)
   {
-    // Add field only if internal Mesh exists (skip if not selected).
-    // Note we still need to read internalField even if internal mesh is
-    // not selected, since boundaries without value entries may refer to
-    // the internalField.
-    if (internalMesh != nullptr)
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
+    if (this->Parent->GetDecomposePolyhedra() && this->NumTotalAdditionalCells > 0)
     {
-      if (this->Parent->GetDecomposePolyhedra())
-      {
-        // add values for decomposed cells
-        this->ExtendArray<vtkFloatArray, float>(
-          iData, this->NumCells + this->NumTotalAdditionalCells);
-        vtkIdType nTuples = this->AdditionalCellIds->GetNumberOfTuples();
-        vtkIdType additionalCellI = this->NumCells;
-        for (vtkIdType tupleI = 0; tupleI < nTuples; tupleI++)
-        {
-          const int nCells = this->NumAdditionalCells->GetValue(tupleI);
-          const vtkIdType cellId = this->AdditionalCellIds->GetValue(tupleI);
-          for (int cellI = 0; cellI < nCells; cellI++)
-          {
-            iData->InsertTuple(additionalCellI++, cellId, iData);
-          }
-        }
-      }
+      // Add values for decomposed cells
+      const vtkIdType nTuples = this->AdditionalCellIds->GetNumberOfTuples();
+      vtkIdType newCelli = this->NumCells;
 
-      // Set data to internal mesh
-      ::AddArrayToFieldData(internalMesh->GetCellData(), iData, io.GetObjectName(), dimString);
+      this->ExtendArray<vtkFloatArray, float>(
+        iData, this->NumCells + this->NumTotalAdditionalCells);
 
-      if (this->Parent->GetCreateCellToPoint())
+      for (vtkIdType tupleI = 0; tupleI < nTuples; tupleI++)
       {
-        // Create cell-to-point interpolated data
-        ctpData = vtkFloatArray::New();
-        ctpData->SetNumberOfComponents(iData->GetNumberOfComponents());
-        ctpData->SetNumberOfTuples(internalMesh->GetPoints()->GetNumberOfPoints());
-        if (this->InternalPoints != nullptr)
+        const int nvals = this->NumAdditionalCells->GetValue(tupleI);
+        const vtkIdType cellId = this->AdditionalCellIds->GetValue(tupleI);
+        for (int vali = 0; vali < nvals; ++vali)
         {
-          this->InterpolateCellToPoint(ctpData, iData, internalMesh, this->InternalPoints,
-            this->InternalPoints->GetNumberOfTuples());
-        }
-
-        if (this->Parent->GetDecomposePolyhedra())
-        {
-          // assign cell values to additional points
-          vtkIdType nPoints = this->AdditionalCellIds->GetNumberOfTuples();
-          for (vtkIdType pointI = 0; pointI < nPoints; pointI++)
-          {
-            ctpData->SetTuple(
-              this->NumPoints + pointI, this->AdditionalCellIds->GetValue(pointI), iData);
-          }
+          iData->InsertTuple(newCelli++, cellId, iData);
         }
       }
     }
-  }
-  else
-  {
-    // determine as there's no cells
-    iData->Delete();
-    if (acData != nullptr)
-    {
-      acData->Delete();
-    }
-    return;
-  }
+#endif // VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
 
-  // Set boundary values
-  const vtkFoamEntry* bfieldEntries = nullptr;
-  if (!isInternalField)
-  {
-    bfieldEntries = dict.Lookup("boundaryField");
-    if (bfieldEntries == nullptr)
+    // Set data to internal mesh
+    ::AddArrayToFieldData(internalMesh->GetCellData(), iData, io.GetObjectName(), dimString);
+
+    if (this->Parent->GetCreateCellToPoint())
     {
-      vtkWarningMacro(<< "boundaryField not found in object " << varName
-                      << " at time = " << this->TimeNames->GetValue(this->TimeStep));
-      iData->Delete();
-      if (acData != nullptr)
+      // Create cell-to-point interpolated data
+      ctpData = vtkFloatArray::New();
+      ctpData->SetNumberOfComponents(nComponents);
+      ctpData->SetNumberOfTuples(internalMesh->GetPoints()->GetNumberOfPoints());
+      if (this->InternalPoints != nullptr)
       {
-        acData->Delete();
+        this->InterpolateCellToPoint(ctpData, iData, internalMesh, this->InternalPoints,
+          this->InternalPoints->GetNumberOfTuples());
       }
-      if (ctpData != nullptr)
+
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
+      if (this->Parent->GetDecomposePolyhedra())
       {
-        ctpData->Delete();
+        // assign cell values to additional points
+        const vtkIdType nAddPoints = this->AdditionalCellIds->GetNumberOfTuples();
+        for (vtkIdType pointi = 0, newPointi = this->NumPoints; pointi < nAddPoints;
+             ++pointi, ++newPointi)
+        {
+          ctpData->SetTuple(newPointi, this->AdditionalCellIds->GetValue(pointi), iData);
+        }
       }
-      return;
+#endif // VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
     }
   }
 
-  const auto& patches = this->BoundaryDict;
+  // Handle cell zones
+  // ...
 
-  const bool faceOwner64Bit = ::Is64BitArray(this->FaceOwner);
+  // The cell-to-point interpolated data for boundary cells
+  vtkFloatArray* acData = nullptr;
 
-  unsigned int activeBoundaryIndex = 0;
-  for (const vtkFoamPatch& patch : patches)
+  if (boundaryMesh != nullptr)
   {
-    const vtkIdType nFaces = patch.size_;
+    if (this->Parent->GetCreateCellToPoint())
+    {
+      acData = vtkFloatArray::New();
+      acData->SetNumberOfComponents(nComponents);
+      acData->SetNumberOfTuples(this->AllBoundaries->GetNumberOfCells());
+    }
 
-    vtkFloatArray* vData = nullptr;
-    std::string bcType;
+    unsigned int activeBoundaryIndex = 0;
+    vtkFoamError warnings;
 
-    if (bfieldEntries != nullptr)
+    for (const vtkFoamPatch& patch : patches)
     {
-      bool badEntry = false;
+      const vtkIdType nFaces = patch.size_;
 
-      const vtkFoamEntry* bfieldEntry = bfieldEntries->Dictionary().Lookup(patch.name_, true);
-      if (bfieldEntry == nullptr)
-      {
-        badEntry = true;
-        vtkWarningMacro(<< "boundaryField " << patch.name_ << " not found in object " << varName
-                        << " at time = " << this->TimeNames->GetValue(this->TimeStep));
-      }
-      else if (bfieldEntry->FirstValue().GetType() != vtkFoamToken::DICTIONARY)
-      {
-        badEntry = true;
-        vtkWarningMacro(<< "boundaryField " << patch.name_ << " not a subdictionary in object "
-                        << varName << " at time = " << this->TimeNames->GetValue(this->TimeStep));
-      }
-      else
+      vtkFloatArray* vData = nullptr;
+      std::string bcType;
+
+      if (bfieldEntries != nullptr)
       {
-        const vtkFoamDict& patchDict = bfieldEntry->Dictionary();
+        bool badEntry = false;
 
-        // Look for "value" entry
-        vtkFoamEntry* vEntry = patchDict.Lookup("value");
-        if (vEntry == nullptr)
+        const vtkFoamEntry* bfieldEntry = bfieldEntries->Dictionary().Lookup(patch.name_, true);
+        if (bfieldEntry == nullptr)
         {
-          // For alternative fallback
-          const vtkFoamEntry* eptr = patchDict.Lookup("type");
-          if (eptr != nullptr)
-          {
-            bcType = eptr->ToString();
-          }
+          badEntry = true;
+          warnings << "not found";
+        }
+        else if (bfieldEntry->FirstValue().GetType() != vtkFoamToken::DICTIONARY)
+        {
+          badEntry = true;
+          warnings << "not a subdictionary";
         }
         else
         {
-          vData = this->FillField(*vEntry, nFaces, io, fieldDataType);
-          if (vData == nullptr)
+          const vtkFoamDict& patchDict = bfieldEntry->Dictionary();
+
+          // Look for "value" entry
+          vtkFoamEntry* vEntry = patchDict.Lookup("value");
+          if (vEntry == nullptr)
           {
-            badEntry = true;
+            // For alternative fallback
+            const vtkFoamEntry* eptr = patchDict.Lookup("type");
+            if (eptr != nullptr)
+            {
+              bcType = eptr->ToString();
+            }
+          }
+          else
+          {
+            vData = this->FillField(*vEntry, nFaces, io, fieldDataType);
+            if (vData == nullptr)
+            {
+              badEntry = true;
+            }
           }
         }
-      }
 
-      // If anything unexpected happened, get out
-      if (badEntry)
-      {
-        iData->Delete();
-        if (acData != nullptr)
-        {
-          acData->Delete();
-        }
-        if (ctpData != nullptr)
+        // If anything unexpected happened, get out
+        if (badEntry)
         {
-          ctpData->Delete();
+          if (!warnings.empty())
+          {
+            vtkWarningMacro(<< "boundaryField " << patch.name_ << ' ' << warnings << " in object "
+                            << varName
+                            << " at time = " << this->TimeNames->GetValue(this->TimeStep));
+          }
+
+          iData->Delete();
+          if (acData != nullptr)
+          {
+            acData->Delete();
+          }
+          if (ctpData != nullptr)
+          {
+            ctpData->Delete();
+          }
+          return;
         }
-        return;
       }
-    }
-
-    // Relative start into the FaceOwner list, which may have been truncated (boundaries only)
-    // or have its original length
 
-    const vtkIdType boundaryStartFace = patch.start_ -
-      (this->FaceOwner->GetNumberOfTuples() < this->NumFaces ? patches.startFace() : 0);
+      // Relative start into the FaceOwner list, which may have been truncated (boundaries only)
+      // or have its original length
 
-    if (vData == nullptr)
-    {
-      // No "value" entry
-      // Default to patch-internal values as boundary values
-      vData = vtkFloatArray::New();
-      vData->SetNumberOfComponents(iData->GetNumberOfComponents());
-      vData->SetNumberOfTuples(nFaces);
+      const vtkIdType boundaryStartFace = patch.start_ -
+        (this->FaceOwner->GetNumberOfTuples() < this->NumFaces ? patches.startFace() : 0);
 
-      // Ad hoc handling of some known bcs without a "value"
-      if (bcType == "noSlip")
-      {
-        vData->FillValue(0);
-      }
-      else
+      if (vData == nullptr)
       {
-        for (vtkIdType facei = 0; facei < nFaces; ++facei)
+        // No "value" entry
+        // Default to patch-internal values as boundary values
+        vData = vtkFloatArray::New();
+        vData->SetNumberOfComponents(nComponents);
+        vData->SetNumberOfTuples(nFaces);
+
+        // Ad hoc handling of some known bcs without a "value"
+        if (bcType == "noSlip")
         {
-          vtkTypeInt64 cellId =
-            GetLabelValue(this->FaceOwner, boundaryStartFace + facei, faceOwner64Bit);
-          vData->SetTuple(facei, cellId, iData);
+          vData->FillValue(0);
         }
-      }
-    }
+        else
+        {
+          for (vtkIdType bFacei = 0; bFacei < nFaces; ++bFacei)
+          {
+            const vtkTypeInt64 own =
+              GetLabelValue(this->FaceOwner, bFacei + boundaryStartFace, faceOwner64Bit);
 
-    if (this->Parent->GetCreateCellToPoint())
-    {
-      const vtkIdType startFace = patch.offset_;
+            vData->SetTuple(bFacei, own, iData);
+          }
+        }
+      }
 
-      // if reading a processor sub-case of a decomposed case as is,
-      // use the patch values of the processor patch as is
-      if (patch.type_ == vtkFoamPatch::PHYSICAL ||
-        (this->ProcessorName.empty() && patch.type_ == vtkFoamPatch::PROCESSOR))
+      if (this->Parent->GetCreateCellToPoint())
       {
-        // set the same value to AllBoundaries
-        for (vtkIdType facei = 0; facei < nFaces; ++facei)
+        const vtkIdType startFace = patch.offset_;
+
+        // if reading a processor sub-case of a decomposed case as is,
+        // use the patch values of the processor patch as is
+        if (patch.type_ == vtkFoamPatch::PHYSICAL ||
+          (this->ProcessorName.empty() && patch.type_ == vtkFoamPatch::PROCESSOR))
         {
-          acData->SetTuple(facei + startFace, facei, vData);
+          // set the same value to AllBoundaries
+          for (vtkIdType bFacei = 0; bFacei < nFaces; ++bFacei)
+          {
+            acData->SetTuple(bFacei + startFace, bFacei, vData);
+          }
         }
-      }
-      // implies && !this->ProcessorName.empty()
-      else if (patch.type_ == vtkFoamPatch::PROCESSOR)
-      {
-        // average patch internal value and patch value assuming the
-        // patch value to be the patchInternalField of the neighbor
-        // decomposed mesh. Using double precision to avoid degrade in
-        // accuracy.
-        const int nComponents = vData->GetNumberOfComponents();
-        for (vtkIdType faceI = 0; faceI < nFaces; faceI++)
+        // implies && !this->ProcessorName.empty()
+        else if (patch.type_ == vtkFoamPatch::PROCESSOR)
         {
-          const float* vTuple = vData->GetPointer(nComponents * faceI);
-          const float* iTuple = iData->GetPointer(nComponents *
-            GetLabelValue(this->FaceOwner, boundaryStartFace + faceI, faceOwner64Bit));
-          float* acTuple = acData->GetPointer(nComponents * (startFace + faceI));
-          for (int componentI = 0; componentI < nComponents; componentI++)
+          // average patch internal value and patch value assuming the
+          // patch value to be the patchInternalField of the neighbor
+          // decomposed mesh. Using double precision to avoid degrade in
+          // accuracy.
+          for (vtkIdType bFacei = 0; bFacei < nFaces; ++bFacei)
           {
-            acTuple[componentI] = static_cast<float>(
-              (static_cast<double>(vTuple[componentI]) + static_cast<double>(iTuple[componentI])) *
-              0.5);
+            const vtkIdType own =
+              GetLabelValue(this->FaceOwner, bFacei + boundaryStartFace, faceOwner64Bit);
+
+            const float* vTuple = vData->GetPointer(bFacei * nComponents);
+            const float* iTuple = iData->GetPointer(own * nComponents);
+            float* acTuple = acData->GetPointer((bFacei + startFace) * nComponents);
+
+            for (int cmpt = 0; cmpt < nComponents; ++cmpt)
+            {
+              acTuple[cmpt] = static_cast<float>(
+                0.5 * (static_cast<double>(vTuple[cmpt]) + static_cast<double>(iTuple[cmpt])));
+            }
           }
         }
       }
-    }
-
-    if (patches.isActive(patch.index_))
-    {
-      vtkPolyData* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
-      ::AddArrayToFieldData(bm->GetCellData(), vData, io.GetObjectName(), dimString);
 
-      if (this->Parent->GetCreateCellToPoint())
+      if (patches.isActive(patch.index_))
       {
-        // construct cell-to-point interpolated boundary values. This
-        // is done independently from allBoundary interpolation so
-        // that the interpolated values are not affected by
-        // neighboring patches especially at patch edges and for
-        // baffle patches
-        vtkFloatArray* pData = vtkFloatArray::New();
-        pData->SetNumberOfComponents(vData->GetNumberOfComponents());
-        vtkIdType nPoints = bm->GetPoints()->GetNumberOfPoints();
-        pData->SetNumberOfTuples(nPoints);
-        this->InterpolateCellToPoint(pData, vData, bm, nullptr, nPoints);
-        ::AddArrayToFieldData(bm->GetPointData(), pData, io.GetObjectName(), dimString);
-        pData->Delete();
-      }
+        vtkPolyData* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
+        ::AddArrayToFieldData(bm->GetCellData(), vData, io.GetObjectName(), dimString);
 
-      ++activeBoundaryIndex;
-    }
-    vData->Delete();
-  }
-  iData->Delete();
+        if (this->Parent->GetCreateCellToPoint())
+        {
+          // construct cell-to-point interpolated boundary values. This
+          // is done independently from allBoundary interpolation so
+          // that the interpolated values are not affected by
+          // neighboring patches especially at patch edges and for
+          // baffle patches
+          vtkFloatArray* pData = vtkFloatArray::New();
+          pData->SetNumberOfComponents(vData->GetNumberOfComponents());
+          vtkIdType nPoints = bm->GetPoints()->GetNumberOfPoints();
+          pData->SetNumberOfTuples(nPoints);
+          this->InterpolateCellToPoint(pData, vData, bm, nullptr, nPoints);
+          ::AddArrayToFieldData(bm->GetPointData(), pData, io.GetObjectName(), dimString);
+          pData->Delete();
+        }
 
-  if (this->Parent->GetCreateCellToPoint())
-  {
-    // Create cell-to-point interpolated data for all boundaries and
-    // override internal values
-    vtkFloatArray* bpData = vtkFloatArray::New();
-    bpData->SetNumberOfComponents(acData->GetNumberOfComponents());
-    vtkIdType nPoints = this->AllBoundariesPointMap->GetNumberOfTuples();
-    bpData->SetNumberOfTuples(nPoints);
-    this->InterpolateCellToPoint(bpData, acData, this->AllBoundaries, nullptr, nPoints);
-    acData->Delete();
+        ++activeBoundaryIndex;
+      }
+      vData->Delete();
+    }
 
-    if (ctpData != nullptr)
+    if (this->Parent->GetCreateCellToPoint())
     {
-      const bool meshPoints64Bit = ::Is64BitArray(this->AllBoundariesPointMap);
+      // Create cell-to-point interpolated data for all boundaries and
+      // override internal values
+      vtkFloatArray* bpData = vtkFloatArray::New();
+      bpData->SetNumberOfComponents(nComponents);
+      vtkIdType nPoints = this->AllBoundariesPointMap->GetNumberOfTuples();
+      bpData->SetNumberOfTuples(nPoints);
+      this->InterpolateCellToPoint(bpData, acData, this->AllBoundaries, nullptr, nPoints);
+      acData->Delete();
 
-      // set cell-to-pint data for internal mesh
-      for (vtkIdType pointI = 0; pointI < nPoints; pointI++)
+      if (ctpData != nullptr)
       {
-        ctpData->SetTuple(
-          GetLabelValue(this->AllBoundariesPointMap, pointI, meshPoints64Bit), pointI, bpData);
+        const bool meshPoints64Bit = ::Is64BitArray(this->AllBoundariesPointMap);
+
+        // set cell-to-pint data for internal mesh
+        for (vtkIdType pointI = 0; pointI < nPoints; pointI++)
+        {
+          ctpData->SetTuple(
+            GetLabelValue(this->AllBoundariesPointMap, pointI, meshPoints64Bit), pointI, bpData);
+        }
+        ::AddArrayToFieldData(internalMesh->GetPointData(), ctpData, io.GetObjectName(), dimString);
+        ctpData->Delete();
       }
-      ::AddArrayToFieldData(internalMesh->GetPointData(), ctpData, io.GetObjectName(), dimString);
-      ctpData->Delete();
-    }
 
-    bpData->Delete();
+      bpData->Delete();
+    }
   }
+
+  // Done with internalField
+  iData->Delete();
 }
 
 //------------------------------------------------------------------------------
 // Read point field at a timestep
 void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varName)
 {
+  // Where to map data
   vtkUnstructuredGrid* internalMesh = this->InternalMesh;
   vtkMultiBlockDataSet* boundaryMesh = this->BoundaryMesh;
 
+  // Boundary information
+  const auto& patches = this->BoundaryDict;
+
   vtkFoamIOobject io(this->CasePath, this->Parent);
   vtkFoamDict dict;
   if (!this->ReadFieldFile(io, dict, varName, this->Parent->PointDataArraySelection))
@@ -8764,93 +8829,117 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
   // Eg, from "pointScalarField" -> SCALAR_TYPE
   const auto fieldDataType(vtkFoamTypes::ToEnum(io.GetClassName(), 5));
 
-  vtkFoamEntry* iEntry = dict.Lookup("internalField");
-  if (iEntry == nullptr)
+  // -------------------------
+  // Handle dictionary lookups first
+
+  // The "dimensions" entry - stringify
+  const std::string dimString(this->ConstructDimensions(dict));
+
+  // The "internalField" entry
+  vtkFoamEntry* ifieldEntry = nullptr;
   {
-    vtkErrorMacro(<< "internalField not found in " << io.GetFileName());
-    return;
+    ifieldEntry = dict.Lookup("internalField");
+    if (ifieldEntry == nullptr)
+    {
+      vtkErrorMacro(<< "internalField not found in " << io.GetFileName());
+      return;
+    }
+    else if (ifieldEntry->FirstValue().GetType() == vtkFoamToken::EMPTYLIST)
+    {
+      if (this->NumPoints)
+      {
+        vtkErrorMacro(<< "internalField of " << io.GetFileName() << " is empty");
+      }
+      return;
+    }
   }
 
-  if (iEntry->FirstValue().GetType() == vtkFoamToken::EMPTYLIST)
+  // The "boundaryField" entry
+  const vtkFoamEntry* bfieldEntries = nullptr;
   {
-    // if there's no cell there shouldn't be any boundary faces either
-    if (this->NumPoints > 0)
+    bfieldEntries = dict.Lookup("boundaryField");
+    if (bfieldEntries == nullptr)
     {
-      vtkErrorMacro(<< "internalField of " << io.GetFileName() << " is empty");
+      vtkWarningMacro(<< "boundaryField not found in " << io.GetFileName()
+                      << " at time = " << this->TimeNames->GetValue(this->TimeStep));
+      return;
     }
-    return;
   }
 
-  vtkFloatArray* iData = this->FillField(*iEntry, this->NumPoints, io, fieldDataType);
+  // -------------------------
+
+  // Generate internal field data
+  vtkFloatArray* iData = this->FillField(*ifieldEntry, this->NumPoints, io, fieldDataType);
   if (iData == nullptr)
   {
     return;
   }
+  else if (iData->GetSize() == 0)
+  {
+    // Determined that there are no points. Ignore the field
+    iData->Delete();
+    return;
+  }
 
-  const std::string dimString(this->ConstructDimensions(dict));
+  // Invariant for this field
+  const int nComponents = iData->GetNumberOfComponents();
 
-  // AdditionalCellPoints is nullptr if creation of InternalMesh had been skipped
-  if (this->AdditionalCellPoints != nullptr)
+  // Add field only if internal Mesh exists (skip if not selected).
+  // Note we still need to read internalField even if internal mesh is
+  // not selected, since boundaries without value entries may refer to
+  // the internalField.
+  if (internalMesh != nullptr)
   {
-    // point-to-cell interpolation to additional cell centroidal points
-    // for decomposed cells
-    const int nAdditionalPoints = static_cast<int>(this->AdditionalCellPoints->size());
-    const int nComponents = iData->GetNumberOfComponents();
-    this->ExtendArray<vtkFloatArray, float>(iData, this->NumPoints + nAdditionalPoints);
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
+    if (this->Parent->GetDecomposePolyhedra() && this->AdditionalCellPoints &&
+      !this->AdditionalCellPoints->empty())
+    {
+      // The point-to-cell interpolation to additional cell centroidal points for decomposed cells
+      const auto& addCellPoints = *this->AdditionalCellPoints;
+      const vtkIdType nAddPoints = static_cast<vtkIdType>(addCellPoints.size());
+      this->ExtendArray<vtkFloatArray, float>(iData, this->NumPoints + nAddPoints);
 
-    const bool cellPoints64Bit =
-      (nAdditionalPoints > 0 && ::Is64BitArray(this->AdditionalCellPoints->front()));
+      const bool cellPoints64Bit =
+        (nAddPoints > 0 && ::Is64BitArray(this->AdditionalCellPoints->front()));
 
-    for (int i = 0; i < nAdditionalPoints; i++)
-    {
-      vtkDataArray* acp = this->AdditionalCellPoints->operator[](i);
-      vtkIdType nPoints = acp->GetDataSize();
       double interpolatedValue[9];
-      for (int k = 0; k < nComponents; k++)
+      for (vtkIdType i = 0, newPointi = this->NumPoints; i < nAddPoints; ++i, ++newPointi)
       {
-        interpolatedValue[k] = 0.0;
-      }
-      for (vtkIdType j = 0; j < nPoints; j++)
-      {
-        const float* tuple =
-          iData->GetPointer(nComponents * GetLabelValue(acp, j, cellPoints64Bit));
-        for (int k = 0; k < nComponents; k++)
+        vtkDataArray* acp = addCellPoints[i];
+        const vtkIdType nPoints = acp->GetDataSize();
+
+        for (int cmpt = 0; cmpt < nComponents; ++cmpt)
         {
-          interpolatedValue[k] += tuple[k];
+          interpolatedValue[cmpt] = 0; // zero contents
         }
+        for (vtkIdType meshPointi = 0; meshPointi < nPoints; ++meshPointi)
+        {
+          const float* tuple =
+            iData->GetPointer(nComponents * GetLabelValue(acp, meshPointi, cellPoints64Bit));
+
+          for (int cmpt = 0; cmpt < nComponents; ++cmpt)
+          {
+            interpolatedValue[cmpt] += tuple[cmpt];
+          }
+        }
+        const double weight = 1.0 / static_cast<double>(nPoints);
+        for (int cmpt = 0; cmpt < nComponents; ++cmpt)
+        {
+          interpolatedValue[cmpt] *= weight;
+        }
+
+        // Will automatically be converted to float
+        iData->InsertTuple(newPointi, interpolatedValue);
       }
-      const double weight = 1.0 / static_cast<double>(nPoints);
-      for (int k = 0; k < nComponents; k++)
-      {
-        interpolatedValue[k] *= weight;
-      }
-      // will automatically be converted to float
-      iData->InsertTuple(this->NumPoints + i, interpolatedValue);
     }
-  }
+#endif
 
-  if (iData->GetSize() > 0)
-  {
-    // Add field only if internal Mesh exists (skip if not selected).
-    // Note we still need to read internalField even if internal mesh is
-    // not selected, since boundaries without value entries may refer to
-    // the internalField.
-    if (internalMesh != nullptr)
-    {
-      // Set data to internal mesh
-      ::AddArrayToFieldData(internalMesh->GetPointData(), iData, io.GetObjectName(), dimString);
-    }
-  }
-  else
-  {
-    // determine as there's no points
-    iData->Delete();
-    return;
+    // Set data to internal mesh
+    ::AddArrayToFieldData(internalMesh->GetPointData(), iData, io.GetObjectName(), dimString);
   }
 
   // Boundary
   // Use patch-internal values as boundary values
-  const auto& patches = this->BoundaryDict;
 
   unsigned int activeBoundaryIndex = 0;
 
@@ -8863,11 +8952,11 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
       const vtkIdType nPoints = bpMap->GetNumberOfTuples();
       const bool meshPoints64Bit = ::Is64BitArray(bpMap);
 
-      vData->SetNumberOfComponents(iData->GetNumberOfComponents());
+      vData->SetNumberOfComponents(nComponents);
       vData->SetNumberOfTuples(nPoints);
-      for (vtkIdType j = 0; j < nPoints; j++)
+      for (vtkIdType pointi = 0; pointi < nPoints; ++pointi)
       {
-        vData->SetTuple(j, GetLabelValue(bpMap, j, meshPoints64Bit), iData);
+        vData->SetTuple(pointi, GetLabelValue(bpMap, pointi, meshPoints64Bit), iData);
       }
 
       vtkPolyData* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
@@ -8877,6 +8966,11 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
       ++activeBoundaryIndex;
     }
   }
+
+  // Handle any zones
+  // ...
+
+  // Done with internalField
   iData->Delete();
 }
 
@@ -9133,7 +9227,7 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     zm->Allocate(nLabels);
 
     // Insert cells
-    this->InsertCellsToGrid(zm, meshCells, meshFaces, nullptr, nullptr, &labels);
+    this->InsertCellsToGrid(zm, meshCells, meshFaces, &labels);
 
     // Set points for zone
     zm->SetPoints(points);
@@ -9375,12 +9469,14 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   recreateInternalMesh |=
     (this->InternalMeshSelectionStatus != this->InternalMeshSelectionStatusOld);
 
+#if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   if (this->InternalMeshSelectionStatus)
   {
     // Cell representation changed that affects the internalMesh
     recreateInternalMesh |=
       (this->Parent->DecomposePolyhedra != this->Parent->DecomposePolyhedraOld);
   }
+#endif
 
   // NOTE: this is still not quite right for zones, but until we get better separation
   // - can remove zones without triggering reread
-- 
GitLab


From 67e28f02252bdd70c6cbaa906581727129ca6673 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Mon, 1 Feb 2021 18:07:51 +0100
Subject: [PATCH 09/36] openfoam: vtkNew, vtkSmartPointer to simplify memory
 management

- remove legacy vtkDataArray resize workaround (ExtendArray).
  For concrete array types such as vtkFloatArray,
  vtkTypeInt64Array etc Resize() is without doubling etc.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 671 +++++++++++++-----------------
 1 file changed, 298 insertions(+), 373 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 811e12ac1ef..ef0fc6d7dd8 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -922,7 +922,7 @@ private:
   bool ListTimeDirectoriesByInstances();
 
   // Read polyMesh/points (vectorField)
-  vtkFloatArray* ReadPointsFile();
+  vtkSmartPointer<vtkFloatArray> ReadPointsFile();
 
   // Read polyMesh/faces (faceCompactList or faceList)
   std::unique_ptr<vtkFoamLabelListList> ReadFacesFile(const std::string& meshDir);
@@ -951,17 +951,14 @@ private:
   void InsertFacesToGrid(vtkPolyData*, const vtkFoamLabelListList& meshFaces, vtkIdType startFace,
     vtkIdType endFace, vtkDataArray*, vtkIdList*, vtkDataArray*, bool);
 
-  template <typename T1, typename T2>
-  bool ExtendArray(T1*, vtkIdType);
-
   vtkMultiBlockDataSet* MakeBoundaryMesh(
     const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
 
   void TruncateFaceOwner();
 
   // Move additional points for decomposed cells
-  vtkPoints* MoveInternalMesh(vtkUnstructuredGrid*, vtkFloatArray*);
-  void MoveBoundaryMesh(vtkMultiBlockDataSet*, vtkFloatArray*);
+  bool MoveInternalMesh(vtkUnstructuredGrid*, vtkFloatArray*);
+  bool MoveBoundaryMesh(vtkMultiBlockDataSet*, vtkFloatArray*);
 
   // cell-to-point interpolator
   void InterpolateCellToPoint(
@@ -973,8 +970,8 @@ private:
   // read and create cell/point fields
   bool ReadFieldFile(vtkFoamIOobject& io, vtkFoamDict& dict, const std::string& varName,
     const vtkDataArraySelection* selection);
-  vtkFloatArray* FillField(vtkFoamEntry& entry, vtkIdType nElements, const vtkFoamIOobject& io,
-    vtkFoamTypes::dataType fieldDataType);
+  vtkSmartPointer<vtkFloatArray> FillField(vtkFoamEntry& entry, vtkIdType nElements,
+    const vtkFoamIOobject& io, vtkFoamTypes::dataType fieldDataType);
   void GetVolFieldAtTimeStep(const std::string& varName, bool isInternalField = false);
   // void GetAreaFieldAtTimeStep(const std::string& varName);
   void GetPointFieldAtTimeStep(const std::string& varName);
@@ -3039,6 +3036,19 @@ private:
   void ReadList(vtkFoamIOobject& io);
 
 public:
+  // Construct empty value with given parent
+  explicit vtkFoamEntryValue(const vtkFoamEntry* parent)
+    : IsUniformEntry(false)
+    , Managed(true)
+    , UpperEntryPtr(parent)
+  {
+  }
+  // Copy construct
+  vtkFoamEntryValue(vtkFoamEntryValue& val, const vtkFoamEntry* parent);
+  ~vtkFoamEntryValue() { this->Clear(); }
+
+  // Helper Classes
+
   // reads primitive int/float lists
   template <typename listT, typename primitiveT>
   class listTraits
@@ -3224,14 +3234,7 @@ public:
     }
   };
 
-  vtkFoamEntryValue(const vtkFoamEntry* upperEntryPtr)
-    : IsUniformEntry(false)
-    , Managed(true)
-    , UpperEntryPtr(upperEntryPtr)
-  {
-  }
-  vtkFoamEntryValue(vtkFoamEntryValue& val, const vtkFoamEntry*);
-  ~vtkFoamEntryValue() { this->Clear(); }
+  // Member Functions
 
   void SetEmptyList()
   {
@@ -3260,11 +3263,13 @@ public:
   const vtkFoamDict& Dictionary() const { return *this->Superclass::DictPtr; }
   vtkFoamDict& Dictionary() { return *this->Superclass::DictPtr; }
 
-  // Release the managed pointer
-  void* Ptr()
+  // Release the managed pointer, cast to specified type
+  template <class DataType>
+  DataType* ReleasePtr()
   {
-    this->Managed = false;               // Not managed = do not delete pointer in destructor
-    return this->Superclass::AnyPointer; // List pointers are in a single union
+    // Not managed = do not delete pointer in destructor
+    this->Managed = false;
+    return static_cast<DataType*>(this->Superclass::AnyPointer);
   }
 
   std::string ToString() const
@@ -3294,14 +3299,14 @@ public:
     this->Superclass::Type = LABELLIST;
     if (this->IsLabel64())
     {
-      vtkTypeInt64Array* array = vtkTypeInt64Array::New();
+      auto* array = vtkTypeInt64Array::New();
       array->SetNumberOfValues(size);
       array->FillValue(labelValue);
       this->Superclass::LabelListPtr = array;
     }
     else
     {
-      vtkTypeInt32Array* array = vtkTypeInt32Array::New();
+      auto* array = vtkTypeInt32Array::New();
       array->SetNumberOfValues(size);
       array->FillValue(static_cast<vtkTypeInt32>(labelValue));
       this->Superclass::LabelListPtr = array;
@@ -3774,10 +3779,14 @@ public:
 
   const vtkFoamDict& Dictionary() const { return this->FirstValue().Dictionary(); }
   vtkFoamDict& Dictionary() { return this->FirstValue().Dictionary(); }
-
-  void* Ptr() { return this->FirstValue().Ptr(); }
   const vtkFoamDict* GetUpperDictPtr() const { return this->UpperDictPtr; }
 
+  template <class DataType>
+  DataType* ReleasePtr()
+  {
+    return this->FirstValue().ReleasePtr<DataType>();
+  }
+
   std::string ToString() const
   {
     return this->empty() ? std::string() : this->FirstValue().ToString();
@@ -4194,23 +4203,23 @@ void vtkFoamIOobject::ReadHeader()
   this->objectName_ = eptr->ToString();
 }
 
-vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntry* upperEntryPtr)
+vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntry* parent)
   : vtkFoamToken(value)
   , IsUniformEntry(value.IsUniform())
   , Managed(true)
-  , UpperEntryPtr(upperEntryPtr)
+  , UpperEntryPtr(parent)
 {
   switch (this->Superclass::Type)
   {
     case VECTORLIST:
     {
-      vtkFloatArray* fa = vtkFloatArray::SafeDownCast(value.ToVTKObject());
-      if (fa->GetNumberOfComponents() == 6)
+      auto* array = vtkFloatArray::SafeDownCast(value.ToVTKObject());
+      if (array->GetNumberOfComponents() == 6)
       {
-        // create deepcopies for vtkObjects to avoid duplicated mainpulation
-        vtkFloatArray* newfa = vtkFloatArray::New();
-        newfa->DeepCopy(fa);
-        this->Superclass::VtkObjectPtr = newfa;
+        // DeepCopy for symmTensor fields to avoid duplicated manipulation
+        auto* arrayCopy = vtkFloatArray::New();
+        arrayCopy->DeepCopy(array);
+        this->Superclass::VtkObjectPtr = arrayCopy;
       }
       else
       {
@@ -4242,20 +4251,20 @@ vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntr
       for (size_t valueI = 0; valueI < nValues; valueI++)
       {
         this->EntryValuePtrs->operator[](valueI) =
-          new vtkFoamEntryValue(*value.EntryValuePtrs->operator[](valueI), upperEntryPtr);
+          new vtkFoamEntryValue(*value.EntryValuePtrs->operator[](valueI), this->UpperEntryPtr);
       }
     }
     break;
     case DICTIONARY:
       // UpperEntryPtr is null when called from vtkFoamDict constructor
-      if (this->UpperEntryPtr != nullptr)
+      if (this->UpperEntryPtr == nullptr)
       {
-        this->DictPtr = new vtkFoamDict(*value.DictPtr, this->UpperEntryPtr->GetUpperDictPtr());
-        this->DictPtr->SetStreamOption(value.GetStreamOption());
+        this->DictPtr = nullptr;
       }
       else
       {
-        this->DictPtr = nullptr;
+        this->DictPtr = new vtkFoamDict(*value.DictPtr, this->UpperEntryPtr->GetUpperDictPtr());
+        this->DictPtr->SetStreamOption(value.GetStreamOption());
       }
       break;
     case BOOLLIST:
@@ -4339,14 +4348,14 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
     {
       if (this->IsLabel64())
       {
-        vtkTypeInt64Array* array = vtkTypeInt64Array::New();
+        auto* array = vtkTypeInt64Array::New();
         array->InsertNextValue(currToken.To<vtkTypeInt64>());
         array->InsertNextValue(nextToken.To<vtkTypeInt64>());
         this->Superclass::LabelListPtr = array;
       }
       else
       {
-        vtkTypeInt32Array* array = vtkTypeInt32Array::New();
+        auto* array = vtkTypeInt32Array::New();
         array->InsertNextValue(currToken.To<vtkTypeInt32>());
         array->InsertNextValue(nextToken.To<vtkTypeInt32>());
         this->Superclass::LabelListPtr = array;
@@ -4372,14 +4381,14 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
     {
       if (this->IsLabel64())
       {
-        vtkTypeInt64Array* array = vtkTypeInt64Array::New();
+        auto* array = vtkTypeInt64Array::New();
         array->SetNumberOfValues(1);
         array->SetValue(0, currToken.To<vtkTypeInt64>());
         this->Superclass::LabelListPtr = array;
       }
       else
       {
-        vtkTypeInt32Array* array = vtkTypeInt32Array::New();
+        auto* array = vtkTypeInt32Array::New();
         array->SetNumberOfValues(1);
         array->SetValue(0, currToken.To<vtkTypeInt32>());
         this->Superclass::LabelListPtr = array;
@@ -5351,8 +5360,12 @@ void vtkOpenFOAMReaderPrivate::SortFieldFiles(vtkStringArray* selections, vtkStr
   // The object (field) name in the FoamFile header should always correspond
   // to the filename (without any trailing .gz etc)
 
-  auto names = vtkSmartPointer<vtkStringArray>::New();
-  for (vtkIdType i = 0; i < files->GetNumberOfValues(); ++i)
+  const vtkIdType nFiles = files->GetNumberOfValues();
+
+  vtkNew<vtkStringArray> names;
+  names->SetNumberOfValues(nFiles);
+
+  for (vtkIdType i = 0; i < nFiles; ++i)
   {
     std::string name(files->GetValue(i));
     const auto ending = name.rfind(".gz");
@@ -5360,13 +5373,13 @@ void vtkOpenFOAMReaderPrivate::SortFieldFiles(vtkStringArray* selections, vtkStr
     {
       name.erase(ending);
     }
-    names->InsertNextValue(name);
+    names->SetValue(i, name);
   }
 
   names->Squeeze();
   files->Squeeze();
   vtkSortDataArray::Sort(names, files);
-  for (vtkIdType i = 0; i < names->GetNumberOfValues(); ++i)
+  for (vtkIdType i = 0; i < nFiles; ++i)
   {
     selections->InsertNextValue(names->GetValue(i));
   }
@@ -6139,7 +6152,7 @@ void vtkOpenFOAMReaderPrivate::PopulatePolyMeshDirArrays()
 //
 // - sets NumPoints
 
-vtkFloatArray* vtkOpenFOAMReaderPrivate::ReadPointsFile()
+vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile()
 {
   // Assume failure
   this->NumPoints = 0;
@@ -6158,7 +6171,7 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::ReadPointsFile()
     }
   }
 
-  vtkFloatArray* pointArray = nullptr;
+  vtkSmartPointer<vtkFloatArray> pointArray;
 
   try
   {
@@ -6175,7 +6188,8 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::ReadPointsFile()
         vtkFoamEntryValue::vectorListTraits<vtkFloatArray, float, 3, false>>(io);
     }
 
-    pointArray = static_cast<vtkFloatArray*>(dict.Ptr());
+    // Capture content as smart pointer
+    pointArray.TakeReference(dict.ReleasePtr<vtkFloatArray>());
   }
   catch (const vtkFoamError& err)
   {
@@ -6185,9 +6199,9 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::ReadPointsFile()
     return nullptr;
   }
 
-  assert(pointArray);
+  assert(pointArray.Get() != nullptr);
 
-  // Set the number of points
+  // The number of points
   this->NumPoints = pointArray->GetNumberOfTuples();
 
   return pointArray;
@@ -6221,10 +6235,13 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadFacesFile(
     }
   }
 
-  vtkFoamEntryValue dict(nullptr);
-  dict.SetStreamOption(io);
+  std::unique_ptr<vtkFoamLabelListList> meshFaces;
+
   try
   {
+    vtkFoamEntryValue dict(nullptr);
+    dict.SetStreamOption(io);
+
     if (io.GetClassName() == "faceCompactList")
     {
       dict.ReadCompactLabelListList(io);
@@ -6233,6 +6250,9 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadFacesFile(
     {
       dict.ReadLabelListList(io);
     }
+
+    // Capture content
+    meshFaces.reset(dict.ReleasePtr<vtkFoamLabelListList>());
   }
   catch (const vtkFoamError& err)
   {
@@ -6241,8 +6261,6 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadFacesFile(
     return nullptr;
   }
 
-  std::unique_ptr<vtkFoamLabelListList> meshFaces(static_cast<vtkFoamLabelListList*>(dict.Ptr()));
-
   if (meshFaces)
   {
     this->NumFaces = meshFaces->GetNumberOfElements();
@@ -6301,7 +6319,8 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
     }
     io.Close();
 
-    this->FaceOwner = static_cast<vtkDataArray*>(ownerDict.Ptr());
+    // Store owner faces
+    this->FaceOwner = ownerDict.ReleasePtr<vtkDataArray>();
   }
 
   // Read polyMesh/neighbour
@@ -6345,7 +6364,8 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
     }
     io.Close();
 
-    this->FaceNeigh = static_cast<vtkDataArray*>(neighDict.Ptr());
+    // Store neighbour faces
+    this->FaceNeigh = neighDict.ReleasePtr<vtkDataArray>();
   }
 
   // Basic checks
@@ -6598,12 +6618,12 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
 
   // Scratch array for inserting primitive cell points
   constexpr vtkIdType maxNPoints = 256; // max num of points per cell
-  auto cellPoints = vtkSmartPointer<vtkIdList>::New();
+  vtkNew<vtkIdList> cellPoints;
   cellPoints->SetNumberOfIds(maxNPoints);
 
   // Scratch array for inserting polyhedral faces and sizes
   constexpr vtkIdType maxNPolyPoints = 1024; // max num of nPoints per face + points per cell
-  auto polyPoints = vtkSmartPointer<vtkIdList>::New();
+  vtkNew<vtkIdList> polyPoints;
   polyPoints->SetNumberOfIds(maxNPolyPoints);
 
   // Scratch array for analyzing cell types (cell shape)
@@ -7426,7 +7446,7 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
   vtkFloatArray* pointArray)
 {
   // Create Mesh
-  vtkUnstructuredGrid* internalMesh = vtkUnstructuredGrid::New();
+  auto* internalMesh = vtkUnstructuredGrid::New();
   internalMesh->Allocate(this->NumCells);
 
 #if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
@@ -7438,7 +7458,7 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
     this->NumAdditionalCells = vtkIntArray::New();
     this->AdditionalCellPoints = new vtkFoamLabelArrayVector;
 
-    auto additionalCells = vtkSmartPointer<vtkIdTypeArray>::New();
+    vtkNew<vtkIdTypeArray> additionalCells;
     additionalCells->SetNumberOfComponents(5); // Accommodate tetra or pyramid
 
     this->InsertCellsToGrid(
@@ -7473,10 +7493,9 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
   }
 
   // Set points for internalMesh
-  vtkPoints* points = vtkPoints::New();
+  vtkNew<vtkPoints> points;
   points->SetData(pointArray);
   internalMesh->SetPoints(points);
-  points->Delete();
 
   return internalMesh;
 }
@@ -7573,7 +7592,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     return nullptr;
   }
 
-  vtkMultiBlockDataSet* boundaryMesh = vtkMultiBlockDataSet::New();
+  auto* boundaryMesh = vtkMultiBlockDataSet::New();
 
   if (this->Parent->GetCreateCellToPoint())
   {
@@ -7584,7 +7603,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
   }
   this->BoundaryPointMap = new vtkFoamLabelArrayVector;
 
-  vtkIdTypeArray* nBoundaryPointsList = vtkIdTypeArray::New();
+  vtkNew<vtkIdTypeArray> nBoundaryPointsList;
   nBoundaryPointsList->SetNumberOfValues(nBoundaries);
 
   // count the max number of points per face and the number of points
@@ -7611,7 +7630,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
 
   // Allocate array for converting int vector to vtkIdType List:
   // workaround for 64bit machines
-  vtkIdList* facePointsVtkId = vtkIdList::New();
+  vtkNew<vtkIdList> facePointsVtkId;
   facePointsVtkId->SetNumberOfIds(maxNFacePoints);
 
   // Use same integer width as per faces
@@ -7654,7 +7673,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
 
   vtkTypeInt64 nAllBoundaryPoints = 0;
   std::vector<std::vector<vtkIdType>> procCellList;
-  vtkTypeInt8Array* pointTypes = nullptr;
+  vtkSmartPointer<vtkTypeInt8Array> pointTypes;
 
   if (this->Parent->GetCreateCellToPoint())
   {
@@ -7672,7 +7691,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     {
       // Initialize physical-processor boundary shared point list
       procCellList.resize(static_cast<size_t>(nAllBoundaryPoints));
-      pointTypes = vtkTypeInt8Array::New();
+      pointTypes = vtkSmartPointer<vtkTypeInt8Array>::New();
       pointTypes->SetNumberOfTuples(nAllBoundaryPoints);
       pointTypes->FillValue(0);
     }
@@ -7730,7 +7749,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     }
 
     // Create the boundary patch mesh
-    vtkPolyData* bm = vtkPolyData::New();
+    vtkNew<vtkPolyData> bm;
     ::AppendBlock(boundaryMesh, bm, patch.name_);
 
     bm->AllocateEstimate(nFaces, 1);
@@ -7770,7 +7789,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
       bpMap = vtkTypeInt32Array::New();
     }
     this->BoundaryPointMap->push_back(bpMap);
-    vtkFloatArray* boundaryPointArray = vtkFloatArray::New();
+    vtkNew<vtkFloatArray> boundaryPointArray;
     boundaryPointArray->SetNumberOfComponents(3);
     vtkIdType oldPointJ = -1;
     for (int j = 0; j < nBoundaryPoints; j++)
@@ -7786,24 +7805,18 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     boundaryPointArray->Squeeze();
     bpMap->Squeeze();
     boundaryPointList->Delete();
-    vtkPoints* boundaryPoints = vtkPoints::New();
+    vtkNew<vtkPoints> boundaryPoints;
     boundaryPoints->SetData(boundaryPointArray);
-    boundaryPointArray->Delete();
 
     // Set points for boundary
     bm->SetPoints(boundaryPoints);
-    boundaryPoints->Delete();
 
     // insert faces to boundary mesh
     this->InsertFacesToGrid(
       bm, meshFaces, startFace, endFace, bpMap, facePointsVtkId, nullptr, true);
-    bm->Delete();
     bpMap->ClearLookup();
   }
 
-  nBoundaryPointsList->Delete();
-  facePointsVtkId->Delete();
-
   if (this->Parent->GetCreateCellToPoint())
   {
     this->AllBoundaries->Squeeze();
@@ -7847,10 +7860,9 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
 
     // set dummy vtkPoints to tell the grid the number of points
     // (otherwise GetPointCells will crash)
-    vtkPoints* allBoundaryPoints = vtkPoints::New();
+    vtkNew<vtkPoints> allBoundaryPoints;
     allBoundaryPoints->SetNumberOfPoints(abpMap.GetNumberOfTuples());
     this->AllBoundaries->SetPoints(allBoundaryPoints);
-    allBoundaryPoints->Delete();
 
     if (!this->ProcessorName.empty())
     {
@@ -7872,7 +7884,6 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
           // not typically be so large
         }
       }
-      pointTypes->Delete();
     }
   }
 
@@ -7902,25 +7913,8 @@ void vtkOpenFOAMReaderPrivate::TruncateFaceOwner()
 }
 
 //------------------------------------------------------------------------------
-// this is necessary due to the strange vtkDataArrayTemplate::Resize()
-// implementation when the array size is to be extended
-template <typename T1, typename T2>
-bool vtkOpenFOAMReaderPrivate::ExtendArray(T1* array, vtkIdType nTuples)
-{
-  vtkIdType newSize = nTuples * array->GetNumberOfComponents();
-  void* ptr = malloc(static_cast<size_t>(newSize * array->GetDataTypeSize()));
-  if (ptr == nullptr)
-  {
-    return false;
-  }
-  memmove(ptr, array->GetVoidPointer(0), array->GetDataSize() * array->GetDataTypeSize());
-  array->SetArray(static_cast<T2*>(ptr), newSize, 0);
-  return true;
-}
-
-//------------------------------------------------------------------------------
-// move polyhedral cell centroids
-vtkPoints* vtkOpenFOAMReaderPrivate::MoveInternalMesh(
+// Move mesh points, including the cell centroids for any decomposed polyhedra
+bool vtkOpenFOAMReaderPrivate::MoveInternalMesh(
   vtkUnstructuredGrid* internalMesh, vtkFloatArray* pointArray)
 {
   const auto nOldPoints = internalMesh->GetPoints()->GetNumberOfPoints();
@@ -7931,7 +7925,7 @@ vtkPoints* vtkOpenFOAMReaderPrivate::MoveInternalMesh(
   {
     const auto& addCellPoints = *this->AdditionalCellPoints;
     const vtkIdType nAddPoints = static_cast<vtkIdType>(addCellPoints.size());
-    this->ExtendArray<vtkFloatArray, float>(pointArray, this->NumPoints + nAddPoints);
+    pointArray->Resize(this->NumPoints + nAddPoints);
 
     const bool cellPoints64Bit = ::Is64BitArray(this->AdditionalCellPoints->front());
 
@@ -7966,19 +7960,20 @@ vtkPoints* vtkOpenFOAMReaderPrivate::MoveInternalMesh(
   {
     vtkErrorMacro(<< "Mismatch in number of old points (" << nOldPoints << ") and new points ("
                   << pointArray->GetNumberOfTuples() << ')');
-    return nullptr;
+    return false;
   }
 
-  // instantiate the points class
-  vtkPoints* points = vtkPoints::New();
+  // Update the mesh points. No Delete on pointArray (still used outside)
+  vtkNew<vtkPoints> points;
   points->SetData(pointArray);
   internalMesh->SetPoints(points);
-  return points;
+
+  return true;
 }
 
 //------------------------------------------------------------------------------
-// move boundary points
-void vtkOpenFOAMReaderPrivate::MoveBoundaryMesh(
+// Move boundary points
+bool vtkOpenFOAMReaderPrivate::MoveBoundaryMesh(
   vtkMultiBlockDataSet* boundaryMesh, vtkFloatArray* pointArray)
 {
   const auto& patches = this->BoundaryDict;
@@ -7992,25 +7987,25 @@ void vtkOpenFOAMReaderPrivate::MoveBoundaryMesh(
       const vtkIdType nBoundaryPoints = bpMap->GetNumberOfTuples();
       const bool meshPoints64Bit = ::Is64BitArray(bpMap);
 
-      vtkFloatArray* boundaryPointArray = vtkFloatArray::New();
+      vtkNew<vtkFloatArray> boundaryPointArray;
       boundaryPointArray->SetNumberOfComponents(3);
       boundaryPointArray->SetNumberOfTuples(nBoundaryPoints);
       for (vtkIdType pointi = 0; pointi < nBoundaryPoints; ++pointi)
       {
-        boundaryPointArray->SetTuple(
-          pointi, GetLabelValue(bpMap, pointi, meshPoints64Bit), pointArray);
+        const auto meshPointi = GetLabelValue(bpMap, pointi, meshPoints64Bit);
+        boundaryPointArray->SetTuple(pointi, meshPointi, pointArray);
       }
-      vtkPoints* boundaryPoints = vtkPoints::New();
+      vtkNew<vtkPoints> boundaryPoints;
       boundaryPoints->SetData(boundaryPointArray);
-      boundaryPointArray->Delete();
 
-      vtkPolyData* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
+      auto* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
       bm->SetPoints(boundaryPoints);
-      boundaryPoints->Delete();
 
       ++activeBoundaryIndex;
     }
   }
+
+  return true;
 }
 
 //------------------------------------------------------------------------------
@@ -8027,13 +8022,11 @@ void vtkOpenFOAMReaderPrivate::InterpolateCellToPoint(vtkFloatArray* pData, vtkF
 
   // a dummy call to let GetPointCells() build the cell links if still not built
   // (not using BuildLinks() since it always rebuild links)
-  vtkIdList* pointCells = vtkIdList::New();
-  mesh->GetPointCells(0, pointCells);
-  pointCells->Delete();
+  mesh->GetPointCells(0, vtkNew<vtkIdList>());
 
   // Set up to grab point cells
-  vtkUnstructuredGrid* ug = vtkUnstructuredGrid::SafeDownCast(mesh);
-  vtkPolyData* pd = vtkPolyData::SafeDownCast(mesh);
+  auto* ug = vtkUnstructuredGrid::SafeDownCast(mesh);
+  auto* pd = vtkPolyData::SafeDownCast(mesh);
   vtkIdType nCells;
   vtkIdType* cells;
 
@@ -8170,19 +8163,19 @@ bool vtkOpenFOAMReaderPrivate::ReadFieldFile(vtkFoamIOobject& io, vtkFoamDict& d
 }
 
 //------------------------------------------------------------------------------
-vtkFloatArray* vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry& entry, vtkIdType nElements,
-  const vtkFoamIOobject& io, vtkFoamTypes::dataType fieldDataType)
+vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry& entry,
+  vtkIdType nElements, const vtkFoamIOobject& io, vtkFoamTypes::dataType fieldDataType)
 {
-  vtkFloatArray* data;
   const std::string& className = io.GetClassName();
 
+  vtkSmartPointer<vtkFloatArray> data;
   if (entry.FirstValue().IsUniform())
   {
     if (entry.FirstValue().GetType() == vtkFoamToken::SCALAR ||
       entry.FirstValue().GetType() == vtkFoamToken::LABEL)
     {
       const float num = entry.ToFloat();
-      data = vtkFloatArray::New();
+      data = vtkSmartPointer<vtkFloatArray>::New();
       data->SetNumberOfValues(nElements);
       data->FillValue(num);
     }
@@ -8216,7 +8209,7 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry& entry, vtkIdTyp
       if ((vtkFoamTypes::GetNumberOfComponents(fieldDataType) == nComponents) &&
         vtkFoamTypes::IsVectorSpace(fieldDataType))
       {
-        data = vtkFloatArray::New();
+        data = vtkSmartPointer<vtkFloatArray>::New();
         data->SetNumberOfComponents(nComponents);
         data->SetNumberOfTuples(nElements);
         if (nComponents == 6)
@@ -8256,7 +8249,9 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry& entry, vtkIdTyp
                       << "mesh = " << nElements << ", field = " << nTuples);
         return nullptr;
       }
-      data = static_cast<vtkFloatArray*>(entry.Ptr());
+
+      // Capture content as smart pointer
+      data.TakeReference(entry.ReleasePtr<vtkFloatArray>());
       const int nComponents = data->GetNumberOfComponents();
       if (nComponents == 6)
       {
@@ -8275,7 +8270,7 @@ vtkFloatArray* vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry& entry, vtkIdTyp
     }
     else if (entry.FirstValue().GetType() == vtkFoamToken::EMPTYLIST && nElements <= 0)
     {
-      data = vtkFloatArray::New();
+      data = vtkSmartPointer<vtkFloatArray>::New();
 
       // Set appropriate number of components for empty list as well
       const int nComp = vtkFoamTypes::GetNumberOfComponents(fieldDataType);
@@ -8508,7 +8503,8 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   // -------------------------
 
   // Generate internal field data
-  vtkFloatArray* iData = this->FillField(*ifieldEntry, this->NumCells, io, fieldDataType);
+  vtkSmartPointer<vtkFloatArray> iData =
+    this->FillField(*ifieldEntry, this->NumCells, io, fieldDataType);
   if (iData == nullptr)
   {
     return;
@@ -8516,7 +8512,6 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   else if (iData->GetSize() == 0)
   {
     // Determined that there are no cells. Ignore the field
-    iData->Delete();
     return;
   }
 
@@ -8524,7 +8519,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   const int nComponents = iData->GetNumberOfComponents();
 
   // The cell-to-point interpolated data for cells
-  vtkFloatArray* ctpData = nullptr;
+  vtkSmartPointer<vtkFloatArray> ctpData;
 
   // Add field only if internal Mesh exists (skip if not selected).
   // Note we still need to read internalField even if internal mesh is
@@ -8538,9 +8533,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
       // Add values for decomposed cells
       const vtkIdType nTuples = this->AdditionalCellIds->GetNumberOfTuples();
       vtkIdType newCelli = this->NumCells;
-
-      this->ExtendArray<vtkFloatArray, float>(
-        iData, this->NumCells + this->NumTotalAdditionalCells);
+      iData->Resize(this->NumCells + this->NumTotalAdditionalCells);
 
       for (vtkIdType tupleI = 0; tupleI < nTuples; tupleI++)
       {
@@ -8560,7 +8553,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
     if (this->Parent->GetCreateCellToPoint())
     {
       // Create cell-to-point interpolated data
-      ctpData = vtkFloatArray::New();
+      ctpData = vtkSmartPointer<vtkFloatArray>::New();
       ctpData->SetNumberOfComponents(nComponents);
       ctpData->SetNumberOfTuples(internalMesh->GetPoints()->GetNumberOfPoints());
       if (this->InternalPoints != nullptr)
@@ -8588,13 +8581,13 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   // ...
 
   // The cell-to-point interpolated data for boundary cells
-  vtkFloatArray* acData = nullptr;
+  vtkSmartPointer<vtkFloatArray> acData;
 
   if (boundaryMesh != nullptr)
   {
     if (this->Parent->GetCreateCellToPoint())
     {
-      acData = vtkFloatArray::New();
+      acData = vtkSmartPointer<vtkFloatArray>::New();
       acData->SetNumberOfComponents(nComponents);
       acData->SetNumberOfTuples(this->AllBoundaries->GetNumberOfCells());
     }
@@ -8606,7 +8599,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
     {
       const vtkIdType nFaces = patch.size_;
 
-      vtkFloatArray* vData = nullptr;
+      vtkSmartPointer<vtkFloatArray> vData;
       std::string bcType;
 
       if (bfieldEntries != nullptr)
@@ -8658,16 +8651,6 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
                             << varName
                             << " at time = " << this->TimeNames->GetValue(this->TimeStep));
           }
-
-          iData->Delete();
-          if (acData != nullptr)
-          {
-            acData->Delete();
-          }
-          if (ctpData != nullptr)
-          {
-            ctpData->Delete();
-          }
           return;
         }
       }
@@ -8682,7 +8665,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
       {
         // No "value" entry
         // Default to patch-internal values as boundary values
-        vData = vtkFloatArray::New();
+        vData = vtkSmartPointer<vtkFloatArray>::New();
         vData->SetNumberOfComponents(nComponents);
         vData->SetNumberOfTuples(nFaces);
 
@@ -8745,7 +8728,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
 
       if (patches.isActive(patch.index_))
       {
-        vtkPolyData* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
+        auto* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
         ::AddArrayToFieldData(bm->GetCellData(), vData, io.GetObjectName(), dimString);
 
         if (this->Parent->GetCreateCellToPoint())
@@ -8755,32 +8738,29 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
           // that the interpolated values are not affected by
           // neighboring patches especially at patch edges and for
           // baffle patches
-          vtkFloatArray* pData = vtkFloatArray::New();
+          vtkNew<vtkFloatArray> pData;
           pData->SetNumberOfComponents(vData->GetNumberOfComponents());
-          vtkIdType nPoints = bm->GetPoints()->GetNumberOfPoints();
+          const vtkIdType nPoints = bm->GetPoints()->GetNumberOfPoints();
           pData->SetNumberOfTuples(nPoints);
           this->InterpolateCellToPoint(pData, vData, bm, nullptr, nPoints);
           ::AddArrayToFieldData(bm->GetPointData(), pData, io.GetObjectName(), dimString);
-          pData->Delete();
         }
 
         ++activeBoundaryIndex;
       }
-      vData->Delete();
     }
 
     if (this->Parent->GetCreateCellToPoint())
     {
       // Create cell-to-point interpolated data for all boundaries and
       // override internal values
-      vtkFloatArray* bpData = vtkFloatArray::New();
+      vtkNew<vtkFloatArray> bpData;
       bpData->SetNumberOfComponents(nComponents);
       vtkIdType nPoints = this->AllBoundariesPointMap->GetNumberOfTuples();
       bpData->SetNumberOfTuples(nPoints);
       this->InterpolateCellToPoint(bpData, acData, this->AllBoundaries, nullptr, nPoints);
-      acData->Delete();
 
-      if (ctpData != nullptr)
+      if (ctpData)
       {
         const bool meshPoints64Bit = ::Is64BitArray(this->AllBoundariesPointMap);
 
@@ -8791,15 +8771,9 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
             GetLabelValue(this->AllBoundariesPointMap, pointI, meshPoints64Bit), pointI, bpData);
         }
         ::AddArrayToFieldData(internalMesh->GetPointData(), ctpData, io.GetObjectName(), dimString);
-        ctpData->Delete();
       }
-
-      bpData->Delete();
     }
   }
-
-  // Done with internalField
-  iData->Delete();
 }
 
 //------------------------------------------------------------------------------
@@ -8869,7 +8843,8 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
   // -------------------------
 
   // Generate internal field data
-  vtkFloatArray* iData = this->FillField(*ifieldEntry, this->NumPoints, io, fieldDataType);
+  vtkSmartPointer<vtkFloatArray> iData =
+    this->FillField(*ifieldEntry, this->NumPoints, io, fieldDataType);
   if (iData == nullptr)
   {
     return;
@@ -8877,7 +8852,6 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
   else if (iData->GetSize() == 0)
   {
     // Determined that there are no points. Ignore the field
-    iData->Delete();
     return;
   }
 
@@ -8897,7 +8871,7 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
       // The point-to-cell interpolation to additional cell centroidal points for decomposed cells
       const auto& addCellPoints = *this->AdditionalCellPoints;
       const vtkIdType nAddPoints = static_cast<vtkIdType>(addCellPoints.size());
-      this->ExtendArray<vtkFloatArray, float>(iData, this->NumPoints + nAddPoints);
+      iData->Resize(this->NumPoints + nAddPoints);
 
       const bool cellPoints64Bit =
         (nAddPoints > 0 && ::Is64BitArray(this->AdditionalCellPoints->front()));
@@ -8947,7 +8921,7 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
   {
     if (patches.isActive(patch.index_))
     {
-      vtkFloatArray* vData = vtkFloatArray::New();
+      vtkNew<vtkFloatArray> vData;
       vtkDataArray* bpMap = this->BoundaryPointMap->operator[](activeBoundaryIndex);
       const vtkIdType nPoints = bpMap->GetNumberOfTuples();
       const bool meshPoints64Bit = ::Is64BitArray(bpMap);
@@ -8959,9 +8933,8 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
         vData->SetTuple(pointi, GetLabelValue(bpMap, pointi, meshPoints64Bit), iData);
       }
 
-      vtkPolyData* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
+      auto* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
       ::AddArrayToFieldData(bm->GetPointData(), vData, io.GetObjectName(), dimString);
-      vData->Delete();
 
       ++activeBoundaryIndex;
     }
@@ -8969,15 +8942,12 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
 
   // Handle any zones
   // ...
-
-  // Done with internalField
-  iData->Delete();
 }
 
 //------------------------------------------------------------------------------
 vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
 {
-  vtkMultiBlockDataSet* lagrangianMesh = vtkMultiBlockDataSet::New();
+  auto* lagrangianMesh = vtkMultiBlockDataSet::New();
 
   for (int cloudI = 0; cloudI < this->Parent->LagrangianPaths->GetNumberOfTuples(); cloudI++)
   {
@@ -9006,120 +8976,114 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
 
     // create an empty mesh to keep node/leaf structure of the
     // multi-block consistent even if mesh doesn't exist
-    vtkPolyData* meshI = vtkPolyData::New();
+    vtkNew<vtkPolyData> meshI;
 
     // Extract the cloud name
     ::AppendBlock(lagrangianMesh, meshI, pathI.substr(pathI.rfind('/') + 1));
 
-    vtkFoamIOobject io(this->CasePath, this->Parent);
-    if (!io.OpenOrGzip(positionsPath))
+    // Get the parcel positions as vtkPoints
+    vtkNew<vtkPoints> points;
     {
-      meshI->Delete();
-      continue;
-    }
+      vtkFoamIOobject io(this->CasePath, this->Parent);
+      if (!io.OpenOrGzip(positionsPath))
+      {
+        continue;
+      }
 
-    vtkFoamEntryValue dict(nullptr);
-    try
-    {
-      if (io.IsFloat64())
+      vtkFoamEntryValue dict(nullptr);
+      try
       {
-        dict.ReadNonuniformList<vtkFoamToken::VECTORLIST,
-          vtkFoamEntryValue::vectorListTraits<vtkFloatArray, double, 3, true>>(io);
+        if (io.IsFloat64())
+        {
+          dict.ReadNonuniformList<vtkFoamToken::VECTORLIST,
+            vtkFoamEntryValue::vectorListTraits<vtkFloatArray, double, 3, true>>(io);
+        }
+        else
+        {
+          dict.ReadNonuniformList<vtkFoamToken::VECTORLIST,
+            vtkFoamEntryValue::vectorListTraits<vtkFloatArray, float, 3, true>>(io);
+        }
+
+        // Transfer float tuples to points
+        auto* pointArray = dict.ReleasePtr<vtkFloatArray>();
+        points->SetData(pointArray);
+        pointArray->Delete();
       }
-      else
+      catch (const vtkFoamError& err)
       {
-        dict.ReadNonuniformList<vtkFoamToken::VECTORLIST,
-          vtkFoamEntryValue::vectorListTraits<vtkFloatArray, float, 3, true>>(io);
+        vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
+                      << ": " << err);
+        continue;
       }
     }
-    catch (const vtkFoamError& err)
-    {
-      vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
-                    << ": " << err);
-      meshI->Delete();
-      continue;
-    }
-    io.Close();
-
-    vtkFloatArray* pointArray = static_cast<vtkFloatArray*>(dict.Ptr());
-    const vtkIdType nParticles = pointArray->GetNumberOfTuples();
 
-    // instantiate the points class
-    vtkPoints* points = vtkPoints::New();
-    points->SetData(pointArray);
-    pointArray->Delete();
+    const vtkIdType nParticles = points->GetNumberOfPoints();
 
-    // create lagrangian mesh
+    // Create lagrangian mesh
     meshI->AllocateEstimate(nParticles, 1);
     for (vtkIdType i = 0; i < nParticles; i++)
     {
       meshI->InsertNextCell(VTK_VERTEX, 1, &i);
     }
     meshI->SetPoints(points);
-    points->Delete();
 
-    // read lagrangian fields
+    if (!nParticles)
+    {
+      continue; // Could be empty or missing for a particular region or processor
+    }
+
+    // Read lagrangian fields
     for (int fieldI = 0; fieldI < this->LagrangianFieldFiles->GetNumberOfValues(); fieldI++)
     {
       const std::string varPath(cloudPath + this->LagrangianFieldFiles->GetValue(fieldI));
 
-      vtkFoamIOobject io2(this->CasePath, this->Parent);
-      if (!io2.Open(varPath))
+      vtkFoamIOobject io(this->CasePath, this->Parent);
+      if (!io.Open(varPath))
       {
-        // if the field file doesn't exist we simply return without
-        // issuing an error as a simple way of supporting multi-region
-        // lagrangians
-        continue;
+        continue; // Could be empty or missing for a particular region or processor
       }
 
       // if the variable is disabled on selection panel then skip it
-      const std::string selectionName(io2.GetObjectName());
+      const std::string selectionName(io.GetObjectName());
       if (this->Parent->LagrangianDataArraySelection->ArrayExists(selectionName.c_str()) &&
         !this->Parent->GetLagrangianArrayStatus(selectionName.c_str()))
       {
         continue;
       }
 
-      // read the field file into dictionary
-      vtkFoamEntryValue dict2(nullptr);
-      if (!dict2.ReadField(io2))
+      // Read the field file into dictionary
+      vtkFoamEntryValue dict(nullptr);
+      if (!dict.ReadField(io))
       {
-        vtkErrorMacro(<< "Error reading line " << io2.GetLineNumber() << " of " << io2.GetFileName()
-                      << ": " << io2.GetError());
+        vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
+                      << ": " << io.GetError());
         continue;
       }
 
-      // set lagrangian values
-      if (dict2.GetType() != vtkFoamToken::SCALARLIST &&
-        dict2.GetType() != vtkFoamToken::VECTORLIST && dict2.GetType() != vtkFoamToken::LABELLIST)
+      // Set lagrangian values
+      if (dict.GetType() != vtkFoamToken::SCALARLIST &&
+        dict.GetType() != vtkFoamToken::VECTORLIST && dict.GetType() != vtkFoamToken::LABELLIST)
       {
-        vtkErrorMacro(<< io2.GetFileName() << ": Unsupported lagrangian field type "
-                      << io2.GetClassName());
+        vtkErrorMacro(<< io.GetFileName() << ": Unsupported lagrangian field type "
+                      << io.GetClassName());
         continue;
       }
 
-      vtkDataArray* lData = static_cast<vtkDataArray*>(dict2.Ptr());
+      // Capture content as smart pointer
+      auto fldData = vtkSmartPointer<vtkDataArray>::Take(dict.ReleasePtr<vtkDataArray>());
 
-      // GetNumberOfTuples() works for both scalar and vector
-      const vtkIdType nParticles2 = lData->GetNumberOfTuples();
-      if (nParticles2 != meshI->GetNumberOfCells())
+      const vtkIdType nValues = fldData->GetNumberOfTuples();
+      if (nValues != meshI->GetNumberOfCells())
       {
-        vtkErrorMacro(<< io2.GetFileName()
-                      << ": Sizes of lagrangian mesh and field don't match: mesh = "
-                      << meshI->GetNumberOfCells() << ", field = " << nParticles2);
-        lData->Delete();
+        vtkErrorMacro(<< io.GetFileName() << ": Size mismatch for lagrangian mesh ("
+                      << meshI->GetNumberOfCells() << ") and field (" << nValues << ')');
         continue;
       }
 
-      ::AddArrayToFieldData(meshI->GetCellData(), lData, selectionName);
-      if (this->Parent->GetCreateCellToPoint())
-      {
-        // questionable if this is worth bothering with:
-        ::AddArrayToFieldData(meshI->GetPointData(), lData, selectionName);
-      }
-      lData->Delete();
+      // Provide identical data as cell and as point data
+      ::AddArrayToFieldData(meshI->GetCellData(), fldData, selectionName);
+      ::AddArrayToFieldData(meshI->GetPointData(), fldData, selectionName);
     }
-    meshI->Delete();
   }
   return lagrangianMesh;
 }
@@ -9163,6 +9127,7 @@ std::unique_ptr<vtkFoamDict> vtkOpenFOAMReaderPrivate::GatherBlocks(
 bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
   const vtkFoamLabelListList& meshCells, const vtkFoamLabelListList& meshFaces, vtkPoints* points)
 {
+  typedef vtkUnstructuredGrid zoneVtkType;
   constexpr const char* const zonePrefix = "cellZone";
   constexpr const char* const zoneTypeName = "cellZones";
   constexpr const char* const labelsName = "cellLabels";
@@ -9195,14 +9160,15 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     }
     vtkFoamEntryValue& labelsEntry = eptr->FirstValue();
 
+    // Need mesh, even if the list is empty
+    vtkNew<zoneVtkType> zm;
+
     // Some OpenFOAM versions write an empty list as zero label only (in binary)
     if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
       (labelsEntry.GetType() == vtkFoamToken::LABEL && labelsEntry.ToInt() == 0))
     {
-      // Allocate empty mesh if the list is empty
-      vtkUnstructuredGrid* zm = vtkUnstructuredGrid::New();
+      // For empty list - store empty mesh (for proper block ordering)
       ::SetBlock(zoneMesh, zonei, zm, zoneName);
-      zm->Delete();
       continue;
     }
     else if (labelsEntry.GetType() != vtkFoamToken::LABELLIST)
@@ -9223,7 +9189,6 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
     // Allocate new grid: we do not use resize() beforehand since it
     // could lead to undefined pointers if we return by error
-    vtkUnstructuredGrid* zm = vtkUnstructuredGrid::New();
     zm->Allocate(nLabels);
 
     // Insert cells
@@ -9233,7 +9198,6 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     zm->SetPoints(points);
 
     ::SetBlock(zoneMesh, zonei, zm, zoneName);
-    zm->Delete();
   }
 
   return true;
@@ -9245,6 +9209,7 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
   vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList& meshFaces, vtkPoints* points)
 {
+  typedef vtkPolyData zoneVtkType;
   constexpr const char* const zonePrefix = "faceZone";
   constexpr const char* const zoneTypeName = "faceZones";
   constexpr const char* const labelsName = "faceLabels";
@@ -9277,14 +9242,15 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
     }
     vtkFoamEntryValue& labelsEntry = eptr->FirstValue();
 
+    // Need mesh, even if the list is empty
+    vtkNew<zoneVtkType> zm;
+
     // Some OpenFOAM versions write an empty list as zero label only (in binary)
     if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
       (labelsEntry.GetType() == vtkFoamToken::LABEL && labelsEntry.ToInt() == 0))
     {
-      // Allocate empty mesh if the list is empty
-      vtkPolyData* zm = vtkPolyData::New();
+      // For empty list - store empty mesh (for proper block ordering)
       ::SetBlock(zoneMesh, zonei, zm, zoneName);
-      zm->Delete();
       continue;
     }
     else if (labelsEntry.GetType() != vtkFoamToken::LABELLIST)
@@ -9305,7 +9271,6 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
 
     // Allocate new grid: we do not use resize() beforehand since it
     // could lead to undefined pointer if we return by error
-    vtkPolyData* zm = vtkPolyData::New();
     zm->AllocateEstimate(nLabels, 1);
 
     // allocate array for converting int vector to vtkIdType vector:
@@ -9319,7 +9284,7 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
         maxNFacePoints = nFacePoints;
       }
     }
-    vtkIdList* facePointsVtkId = vtkIdList::New();
+    vtkNew<vtkIdList> facePointsVtkId;
     facePointsVtkId->SetNumberOfIds(maxNFacePoints);
 
     // Insert faces
@@ -9330,7 +9295,6 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
     zm->SetPoints(points);
 
     ::SetBlock(zoneMesh, zonei, zm, zoneName);
-    zm->Delete();
   }
 
   return true;
@@ -9341,6 +9305,7 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
 
 bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh, vtkPoints* points)
 {
+  typedef vtkPolyData zoneVtkType;
   constexpr const char* const zonePrefix = "pointZone";
   constexpr const char* const zoneTypeName = "pointZones";
   constexpr const char* const labelsName = "pointLabels";
@@ -9373,14 +9338,15 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     }
     vtkFoamEntryValue& labelsEntry = eptr->FirstValue();
 
+    // Need mesh, even if the list is empty
+    vtkNew<zoneVtkType> zm;
+
     // Some OpenFOAM versions write an empty list as zero label only (in binary)
     if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
       (labelsEntry.GetType() == vtkFoamToken::LABEL && labelsEntry.ToInt() == 0))
     {
-      // Allocate empty mesh if the list is empty
-      vtkPolyData* zm = vtkPolyData::New();
+      // For empty list - store empty mesh (for proper block ordering)
       ::SetBlock(zoneMesh, zonei, zm, zoneName);
-      zm->Delete();
       continue;
     }
     else if (labelsEntry.GetType() != vtkFoamToken::LABELLIST)
@@ -9401,7 +9367,6 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
     // Allocate new grid: we do not use resize() beforehand since it
     // could lead to undefined pointer if we return by error
-    vtkPolyData* zm = vtkPolyData::New();
     zm->AllocateEstimate(nLabels, 1);
 
     // Insert points
@@ -9426,7 +9391,6 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     zm->SetPoints(points);
 
     ::SetBlock(zoneMesh, zonei, zm, zoneName);
-    zm->Delete();
   }
 
   return true;
@@ -9573,7 +9537,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     this->Parent->UpdateProgress(0.3);
   }
 
-  vtkFloatArray* pointArray = nullptr;
+  vtkSmartPointer<vtkFloatArray> pointArray;
   if (createEulerians &&
     (recreateInternalMesh ||
       (recreateBoundaryMesh && !recreateInternalMesh && this->InternalMesh == nullptr) ||
@@ -9581,7 +9545,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   {
     // Read polyMesh/points, set the number of faces
     pointArray = this->ReadPointsFile();
-    if ((pointArray == nullptr && recreateInternalMesh) ||
+    if ((recreateInternalMesh && pointArray.Get() == nullptr) ||
       (meshFaces && !this->CheckFaceList(*meshFaces)))
     {
       return 0;
@@ -9589,8 +9553,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     this->Parent->UpdateProgress(0.4);
   }
 
-  // make internal mesh
-  // Create Internal Mesh only if required for display
+  // Create internal mesh, only if required for display
   if (createEulerians && recreateInternalMesh)
   {
     const std::string displayName(this->RegionPrefix() + NAME_INTERNALMESH);
@@ -9603,26 +9566,24 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   // Read and construct zones
   if (createEulerians && recreateInternalMesh && this->Parent->GetReadZones())
   {
-    vtkPoints* points = nullptr;
+    vtkSmartPointer<vtkPoints> tmpPoints; // Localized vtkPoints storage
+    vtkWeakPointer<vtkPoints> points;
+
     if (this->InternalMesh != nullptr)
     {
       points = this->InternalMesh->GetPoints();
     }
     else
     {
-      points = vtkPoints::New();
-      points->SetData(pointArray);
+      tmpPoints = vtkSmartPointer<vtkPoints>::New();
+      tmpPoints->SetData(pointArray);
+      points = tmpPoints;
     }
 
     this->PointZoneMesh = vtkMultiBlockDataSet::New();
     if (!this->GetPointZoneMesh(this->PointZoneMesh, points))
     {
       this->ClearZoneMeshes();
-      if (this->InternalMesh == nullptr)
-      {
-        points->Delete();
-      }
-      pointArray->Delete();
       return 0;
     }
     if (this->PointZoneMesh->GetNumberOfBlocks() == 0)
@@ -9635,11 +9596,6 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     if (!this->GetFaceZoneMesh(this->FaceZoneMesh, *meshFaces, points))
     {
       this->ClearZoneMeshes();
-      if (this->InternalMesh == nullptr)
-      {
-        points->Delete();
-      }
-      pointArray->Delete();
       return 0;
     }
     if (this->FaceZoneMesh->GetNumberOfBlocks() == 0)
@@ -9652,11 +9608,6 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     if (!this->GetCellZoneMesh(this->CellZoneMesh, *meshCells, *meshFaces, points))
     {
       this->ClearZoneMeshes();
-      if (this->InternalMesh == nullptr)
-      {
-        points->Delete();
-      }
-      pointArray->Delete();
       return 0;
     }
     if (this->CellZoneMesh->GetNumberOfBlocks() == 0)
@@ -9664,10 +9615,6 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
       this->CellZoneMesh->Delete();
       this->CellZoneMesh = nullptr;
     }
-    if (this->InternalMesh == nullptr)
-    {
-      points->Delete();
-    }
   }
 
   // Don't need meshCells beyond here
@@ -9679,25 +9626,18 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     this->TruncateFaceOwner();
   }
 
+  // Create boundary mesh
   if (createEulerians && recreateBoundaryMesh)
   {
-    vtkFloatArray* boundaryPointArray;
-    if (pointArray != nullptr)
+    vtkFloatArray* boundaryPointArray = pointArray.Get();
+    if (boundaryPointArray == nullptr)
     {
-      boundaryPointArray = pointArray;
+      boundaryPointArray = vtkFloatArray::SafeDownCast(this->InternalMesh->GetPoints()->GetData());
     }
-    else
-    {
-      boundaryPointArray = static_cast<vtkFloatArray*>(this->InternalMesh->GetPoints()->GetData());
-    }
-    // Create boundary mesh
+
     this->BoundaryMesh = this->MakeBoundaryMesh(*meshFaces, boundaryPointArray);
     if (this->BoundaryMesh == nullptr)
     {
-      if (pointArray != nullptr)
-      {
-        pointArray->Delete();
-      }
       return 0;
     }
   }
@@ -9705,25 +9645,26 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   // Don't need meshFaces beyond here
   meshFaces.reset(nullptr);
 
-  // if only point coordinates change refresh point vector
+  // Update the points in each mesh, if the point coordinates changed
   if (createEulerians && moveInternalPoints)
   {
-    // refresh the points in each mesh
-    vtkPoints* points;
-    // Check if Internal Mesh exists first....
+    vtkSmartPointer<vtkPoints> tmpPoints; // Localized vtkPoints storage
+    vtkWeakPointer<vtkPoints> points;
+
+    // Update internal mesh first, since decomposed polyhedra will modify pointArray
     if (this->InternalMesh != nullptr)
     {
-      points = this->MoveInternalMesh(this->InternalMesh, pointArray);
-      if (points == nullptr)
+      if (!this->MoveInternalMesh(this->InternalMesh, pointArray))
       {
-        pointArray->Delete();
         return 0;
       }
+      points = this->InternalMesh->GetPoints();
     }
     else
     {
-      points = vtkPoints::New();
-      points->SetData(pointArray);
+      tmpPoints = vtkSmartPointer<vtkPoints>::New();
+      tmpPoints->SetData(pointArray);
+      points = tmpPoints;
     }
 
     if (this->PointZoneMesh != nullptr)
@@ -9747,71 +9688,71 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
         vtkUnstructuredGrid::SafeDownCast(this->CellZoneMesh->GetBlock(i))->SetPoints(points);
       }
     }
-    points->Delete();
   }
 
+  // Update boundary mesh
   if (createEulerians && moveBoundaryPoints)
   {
-    // Check if Boundary Mesh exists first....
     if (this->BoundaryMesh != nullptr)
     {
       this->MoveBoundaryMesh(this->BoundaryMesh, pointArray);
     }
   }
 
-  if (pointArray != nullptr)
-  {
-    pointArray->Delete();
-  }
+  // Don't need mesh points beyond here...
+  // Be explicit: pointArray = vtkSmartPointer<vtkFloatArray>{};
+
   this->Parent->UpdateProgress(0.5);
 
-  vtkMultiBlockDataSet* lagrangianMesh = nullptr;
-  if (updateVariables)
+  // Eulerian variables
+  if (updateVariables && createEulerians)
   {
-    if (createEulerians)
-    {
-      // Clean up arrays of the previous timestep
+    // Clean up arrays of the previous timestep
 
-      // Internal
-      if (!recreateInternalMesh && this->InternalMesh != nullptr)
-      {
-        this->InternalMesh->GetCellData()->Initialize();
-        this->InternalMesh->GetPointData()->Initialize();
-      }
+    // Internal
+    if (!recreateInternalMesh && this->InternalMesh != nullptr)
+    {
+      this->InternalMesh->GetCellData()->Initialize();
+      this->InternalMesh->GetPointData()->Initialize();
+    }
 
-      // Boundary
-      if (!recreateBoundaryMesh && this->BoundaryMesh != nullptr)
+    // Boundary
+    if (!recreateBoundaryMesh && this->BoundaryMesh != nullptr)
+    {
+      for (unsigned int i = 0; i < this->BoundaryMesh->GetNumberOfBlocks(); i++)
       {
-        for (unsigned int i = 0; i < this->BoundaryMesh->GetNumberOfBlocks(); i++)
-        {
-          auto* bm = vtkPolyData::SafeDownCast(this->BoundaryMesh->GetBlock(i));
-          bm->GetCellData()->Initialize();
-          bm->GetPointData()->Initialize();
-        }
+        auto* bm = vtkPolyData::SafeDownCast(this->BoundaryMesh->GetBlock(i));
+        bm->GetCellData()->Initialize();
+        bm->GetPointData()->Initialize();
       }
+    }
 
-      // read field data variables into Internal/Boundary meshes
-      vtkIdType nFieldsRead = 0;
-      const vtkIdType nFieldsToRead = (this->VolFieldFiles->GetNumberOfValues() +
-        this->DimFieldFiles->GetNumberOfValues() + this->PointFieldFiles->GetNumberOfValues());
+    // read field data variables into Internal/Boundary meshes
+    vtkIdType nFieldsRead = 0;
+    const vtkIdType nFieldsToRead = (this->VolFieldFiles->GetNumberOfValues() +
+      this->DimFieldFiles->GetNumberOfValues() + this->PointFieldFiles->GetNumberOfValues());
 
-      for (vtkIdType i = 0; i < this->VolFieldFiles->GetNumberOfValues(); ++i)
-      {
-        this->GetVolFieldAtTimeStep(this->VolFieldFiles->GetValue(i));
-        this->Parent->UpdateProgress(0.5 + (0.5 * ++nFieldsRead) / nFieldsToRead);
-      }
-      for (vtkIdType i = 0; i < this->DimFieldFiles->GetNumberOfValues(); ++i)
-      {
-        this->GetVolFieldAtTimeStep(this->DimFieldFiles->GetValue(i), true); // Internal field
-        this->Parent->UpdateProgress(0.5 + (0.5 * ++nFieldsRead) / nFieldsToRead);
-      }
-      for (vtkIdType i = 0; i < this->PointFieldFiles->GetNumberOfValues(); ++i)
-      {
-        this->GetPointFieldAtTimeStep(this->PointFieldFiles->GetValue(i));
-        this->Parent->UpdateProgress(0.5 + (0.5 * ++nFieldsRead) / nFieldsToRead);
-      }
+    for (vtkIdType i = 0; i < this->VolFieldFiles->GetNumberOfValues(); ++i)
+    {
+      this->GetVolFieldAtTimeStep(this->VolFieldFiles->GetValue(i));
+      this->Parent->UpdateProgress(0.5 + (0.5 * ++nFieldsRead) / nFieldsToRead);
     }
-    // read lagrangian mesh and fields
+    for (vtkIdType i = 0; i < this->DimFieldFiles->GetNumberOfValues(); ++i)
+    {
+      this->GetVolFieldAtTimeStep(this->DimFieldFiles->GetValue(i), true); // Internal field
+      this->Parent->UpdateProgress(0.5 + (0.5 * ++nFieldsRead) / nFieldsToRead);
+    }
+    for (vtkIdType i = 0; i < this->PointFieldFiles->GetNumberOfValues(); ++i)
+    {
+      this->GetPointFieldAtTimeStep(this->PointFieldFiles->GetValue(i));
+      this->Parent->UpdateProgress(0.5 + (0.5 * ++nFieldsRead) / nFieldsToRead);
+    }
+  }
+
+  // Read lagrangian mesh and fields
+  vtkMultiBlockDataSet* lagrangianMesh = nullptr;
+  if (updateVariables)
+  {
     lagrangianMesh = this->MakeLagrangianMesh();
   }
 
@@ -9819,8 +9760,8 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   {
     for (unsigned int i = 0; i < this->CellZoneMesh->GetNumberOfBlocks(); i++)
     {
-      vtkUnstructuredGrid* ug = vtkUnstructuredGrid::SafeDownCast(this->CellZoneMesh->GetBlock(i));
-      vtkIdTypeArray* idArray = vtkIdTypeArray::SafeDownCast(ug->GetCellData()->GetArray("CellId"));
+      auto* ug = vtkUnstructuredGrid::SafeDownCast(this->CellZoneMesh->GetBlock(i));
+      auto* idArray = vtkIdTypeArray::SafeDownCast(ug->GetCellData()->GetArray("CellId"));
 
       // allocate arrays, cellId array will be removed
       ug->GetCellData()->CopyAllocate(this->InternalMesh->GetCellData(), ug->GetNumberOfCells());
@@ -9863,37 +9804,22 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
 
   if (this->Parent->GetReadZones())
   {
-    // Set zone meshes as output
-    vtkMultiBlockDataSet* zones = nullptr;
+    // Add zone meshes (if any) to output
+    vtkNew<vtkMultiBlockDataSet> zones;
 
     if (this->CellZoneMesh != nullptr)
     {
-      if (zones == nullptr)
-      {
-        zones = vtkMultiBlockDataSet::New();
-      }
       ::AppendBlock(zones, this->CellZoneMesh, "cellZones");
     }
-
     if (this->FaceZoneMesh != nullptr)
     {
-      if (zones == nullptr)
-      {
-        zones = vtkMultiBlockDataSet::New();
-      }
       ::AppendBlock(zones, this->FaceZoneMesh, "faceZones");
     }
-
     if (this->PointZoneMesh != nullptr)
     {
-      if (zones == nullptr)
-      {
-        zones = vtkMultiBlockDataSet::New();
-      }
       ::AppendBlock(zones, this->PointZoneMesh, "pointZones");
     }
-
-    if (zones != nullptr)
+    if (zones->GetNumberOfBlocks() != 0)
     {
       ::AppendBlock(output, zones, "zones");
     }
@@ -10164,8 +10090,7 @@ int vtkOpenFOAMReader::RequestData(vtkInformation* vtkNotUsed(request),
   vtkInformationVector** vtkNotUsed(inputVector), vtkInformationVector* outputVector)
 {
   vtkInformation* outInfo = outputVector->GetInformationObject(0);
-  vtkMultiBlockDataSet* output =
-    vtkMultiBlockDataSet::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));
+  auto* output = vtkMultiBlockDataSet::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));
 
   // Times
   {
@@ -10425,7 +10350,6 @@ void vtkOpenFOAMReader::AddSelectionNames(
   {
     selections->AddArray(objects->GetValue(nameI).c_str());
   }
-  objects->Delete();
 }
 
 //------------------------------------------------------------------------------
@@ -10462,9 +10386,10 @@ vtkDoubleArray* vtkOpenFOAMReader::GetTimeValues()
 //------------------------------------------------------------------------------
 int vtkOpenFOAMReader::MakeMetaDataAtTimeStep(const bool listNextTimeStep)
 {
-  vtkStringArray* cellSelectionNames = vtkStringArray::New();
-  vtkStringArray* pointSelectionNames = vtkStringArray::New();
-  vtkStringArray* lagrangianSelectionNames = vtkStringArray::New();
+  vtkNew<vtkStringArray> cellDataNames;
+  vtkNew<vtkStringArray> pointDataNames;
+  vtkNew<vtkStringArray> lagrangianDataNames;
+
   int ret = 1;
   vtkOpenFOAMReaderPrivate* reader;
   this->Readers->InitTraversal();
@@ -10472,11 +10397,11 @@ int vtkOpenFOAMReader::MakeMetaDataAtTimeStep(const bool listNextTimeStep)
     nullptr)
   {
     ret *= reader->MakeMetaDataAtTimeStep(
-      cellSelectionNames, pointSelectionNames, lagrangianSelectionNames, listNextTimeStep);
+      cellDataNames, pointDataNames, lagrangianDataNames, listNextTimeStep);
   }
-  this->AddSelectionNames(this->Parent->CellDataArraySelection, cellSelectionNames);
-  this->AddSelectionNames(this->Parent->PointDataArraySelection, pointSelectionNames);
-  this->AddSelectionNames(this->Parent->LagrangianDataArraySelection, lagrangianSelectionNames);
+  this->AddSelectionNames(this->Parent->CellDataArraySelection, cellDataNames);
+  this->AddSelectionNames(this->Parent->PointDataArraySelection, pointDataNames);
+  this->AddSelectionNames(this->Parent->LagrangianDataArraySelection, lagrangianDataNames);
 
   return ret;
 }
-- 
GitLab


From 440e836bc45e7df3a28d27af1d1449878abd024d Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 29 Jan 2021 15:42:48 +0100
Subject: [PATCH 10/36] openfoam: improve zone addressing and handling

- add a separate cache handling for id lists instead of storing it
  directly on the VTK mesh. Improves flexibility, but also it is
  quite misleading to displace a "CellID" entry with these are local
  ids that have been assembled from different processors.

- with this change, can now update fields on cellZones and faceZones
  even after turning off internalMesh later.
  The implementation currently ignores cell-to-point interpolation: to
  be addressed in the near future.

- suppress neighbour-side processor faces in faceZones
  to avoid duplicate representation in the final assembly

Still to do for zones:

  - proper mapping of boundary values (face zones).
    As the first step, use the cell value instead of the patch value.
    Using the patch value is too intertwined with the boundary mesh
    at the moment.

  - cell-to-point interpolation (cell/face zones)

  - GUI selection mechanism.
    A flat selector can cause the list length to explode,
    also need better handling of state changes to avoid unnecessary
    re-reading.

    Another blocking point is presented by the current OpenFOAM file
    format. Since there is no information directly in the header,
    currently need to read (parse!) all of the zone files just to obtain
    the zone names for the reader information vector. This is
    potentially too expensive to be desirable.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 717 ++++++++++++++++++++++--------
 1 file changed, 542 insertions(+), 175 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index ef0fc6d7dd8..60e1f566cb9 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -162,6 +162,7 @@
 #include <set>
 #include <sstream>
 #include <typeinfo>
+#include <unordered_map>
 #include <unordered_set>
 #include <utility>
 #include <vector>
@@ -736,6 +737,70 @@ struct vtkFoamBoundaries : public std::vector<vtkFoamPatch>
   vtkIdType whichPatch(vtkIdType faceIndex) const;
 };
 
+//------------------------------------------------------------------------------
+// struct vtkFoamZones
+// A collection of names id-lists, used for OpenFOAM zones or sets.
+// Stored as an unordered map instead of being ordered or a vector of items,
+// since any ordering (like zones) will seen during input and managed with the
+// VTK block structure.
+//
+// The idea is to maintain a list of ids (cell,face,point) in a cache that is
+// separate from the mesh to allow flexible usage later.
+// Also, it does not make any sense to have an entry like "CellId" in the CellData
+// since that not only complicates handling, but is also quite misleading when local
+// cell ids have been assembled from different processors.
+struct vtkFoamZones
+{
+  // Representation for the zone or set type
+  enum zoneType
+  {
+    UNKNOWN = 0, // placeholder
+    POINT = 1,   // pointZone
+    FACE = 2,    // faceZone
+    CELL = 3     // cellZone
+  };
+
+  // Collect and forwarding of errors (cannot use vtkErrorMacro here)
+  vtkFoamError error_;
+
+  // The {cell,face,point}Labels per zone
+  std::unordered_map<std::string, vtkSmartPointer<vtkIdList>> zones_;
+
+  // The zone type
+  zoneType type_ = zoneType::UNKNOWN;
+
+  // If zone map ids have content
+  bool empty() const { return zones_.empty(); }
+
+  // Reset storage and errors
+  void clearAll()
+  {
+    error_.clear();
+    zones_.clear();
+  }
+
+  // Clear and reset the zone type
+  void reset(enum zoneType ztype)
+  {
+    this->clearAll();
+    type_ = ztype;
+  }
+
+  const vtkFoamError& error() const noexcept { return error_; }
+  vtkFoamError& error() noexcept { return error_; }
+
+  // Find zone by name and return list of ids or nullptr on failure
+  vtkIdList* findZone(const std::string& zoneName)
+  {
+    auto iter = zones_.find(zoneName);
+    if (iter != zones_.end())
+    {
+      return iter->second;
+    }
+    return nullptr;
+  }
+};
+
 //------------------------------------------------------------------------------
 // Simple handling of common OpenFOAM data types
 struct vtkFoamTypes
@@ -854,6 +919,10 @@ private:
   vtkFoamBoundaries BoundaryDict;
 
   // Zones
+  vtkFoamZones cellZoneMap;
+  vtkFoamZones faceZoneMap;
+  vtkFoamZones pointZoneMap;
+
   vtkMultiBlockDataSet* CellZoneMesh;
   vtkMultiBlockDataSet* FaceZoneMesh;
   vtkMultiBlockDataSet* PointZoneMesh;
@@ -938,7 +1007,7 @@ private:
 
   // Create volume mesh
   void InsertCellsToGrid(vtkUnstructuredGrid*, const vtkFoamLabelListList& meshCells,
-    const vtkFoamLabelListList& meshFaces, vtkDataArray* cellLabels = nullptr
+    const vtkFoamLabelListList& meshFaces, vtkIdList* cellLabels = nullptr
 #if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
     ,
     vtkIdTypeArray* additionalCellIds = nullptr, vtkFloatArray* pointArray = nullptr
@@ -949,7 +1018,7 @@ private:
     const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
 
   void InsertFacesToGrid(vtkPolyData*, const vtkFoamLabelListList& meshFaces, vtkIdType startFace,
-    vtkIdType endFace, vtkDataArray*, vtkIdList*, vtkDataArray*, bool);
+    vtkIdType endFace, vtkDataArray*, vtkIdList*, vtkIdList* faceLabels, bool isLookupValue);
 
   vtkMultiBlockDataSet* MakeBoundaryMesh(
     const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
@@ -4971,6 +5040,11 @@ vtkOpenFOAMReaderPrivate::vtkOpenFOAMReaderPrivate()
   this->BoundaryPointMap = nullptr;
   this->FaceOwner = nullptr;
   this->FaceNeigh = nullptr;
+
+  this->cellZoneMap.reset(vtkFoamZones::CELL);
+  this->faceZoneMap.reset(vtkFoamZones::FACE);
+  this->pointZoneMap.reset(vtkFoamZones::POINT);
+
   this->PointZoneMesh = nullptr;
   this->FaceZoneMesh = nullptr;
   this->CellZoneMesh = nullptr;
@@ -5041,20 +5115,24 @@ void vtkOpenFOAMReaderPrivate::ClearInternalMeshes()
 
 void vtkOpenFOAMReaderPrivate::ClearZoneMeshes()
 {
-  if (this->PointZoneMesh != nullptr)
+  this->cellZoneMap.clearAll();
+  this->faceZoneMap.clearAll();
+  this->pointZoneMap.clearAll();
+
+  if (this->CellZoneMesh != nullptr)
   {
-    this->PointZoneMesh->Delete();
-    this->PointZoneMesh = nullptr;
+    this->CellZoneMesh->Delete();
+    this->CellZoneMesh = nullptr;
   }
   if (this->FaceZoneMesh != nullptr)
   {
     this->FaceZoneMesh->Delete();
     this->FaceZoneMesh = nullptr;
   }
-  if (this->CellZoneMesh != nullptr)
+  if (this->PointZoneMesh != nullptr)
   {
-    this->CellZoneMesh->Delete();
-    this->CellZoneMesh = nullptr;
+    this->PointZoneMesh->Delete();
+    this->PointZoneMesh = nullptr;
   }
 }
 
@@ -6606,15 +6684,15 @@ bool vtkOpenFOAMReaderPrivate::CheckFaceList(const vtkFoamLabelListList& faces)
 // hexahedron, prism, pyramid, tetrahedron and decompose polyhedron
 void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
   vtkUnstructuredGrid* internalMesh, const vtkFoamLabelListList& meshCells,
-  const vtkFoamLabelListList& meshFaces, vtkDataArray* cellList
+  const vtkFoamLabelListList& meshFaces, vtkIdList* cellLabels
 #if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   ,
   vtkIdTypeArray* additionalCells, vtkFloatArray* pointArray
 #endif
 )
 {
-  const bool cellList64Bit = ::Is64BitArray(cellList);
   const bool faceOwner64Bit = ::Is64BitArray(this->FaceOwner);
+  const bool cellLabels64Bit = faceOwner64Bit; // reasonable assumption
 
   // Scratch array for inserting primitive cell points
   constexpr vtkIdType maxNPoints = 256; // max num of points per cell
@@ -6629,43 +6707,31 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
   // Scratch array for analyzing cell types (cell shape)
   vtkFoamLabelListList::CellType cellFaces;
 
-  const vtkIdType nCells = (cellList == nullptr ? this->NumCells : cellList->GetNumberOfTuples());
+  const vtkIdType nCells = (cellLabels == nullptr ? this->NumCells : cellLabels->GetNumberOfIds());
 
 #if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   // Local variable for polyhedral decomposition
   vtkIdType nAdditionalPoints = 0;
 
-  if (additionalCells && cellList) // sanity check
+  if (additionalCells && cellLabels) // sanity check
   {
     vtkErrorMacro(<< "Decompose polyhedral is not supported on mesh subset");
     return;
   }
 #endif
 
-  vtkSmartPointer<vtkIdTypeArray> arrayId;
-  if (cellList)
-  {
-    // create array holding cell id only on zone mesh
-    arrayId = vtkSmartPointer<vtkIdTypeArray>::New();
-    arrayId->SetName("CellId");
-    arrayId->SetNumberOfTuples(nCells);
-    internalMesh->GetCellData()->AddArray(arrayId);
-  }
-
-  for (vtkIdType cellI = 0; cellI < nCells; cellI++)
+  for (vtkIdType celli = 0; celli < nCells; ++celli)
   {
-    vtkIdType cellId = cellI;
-    if (cellList != nullptr)
+    vtkIdType cellId = celli;
+    if (cellLabels != nullptr)
     {
-      cellId = GetLabelValue(cellList, cellI, cellList64Bit);
-      if (cellId >= this->NumCells)
+      cellId = cellLabels->GetId(celli);
+      if (cellId < 0 || cellId >= this->NumCells)
       {
-        vtkWarningMacro(<< "cellLabels id " << cellId << " exceeds the number of cells " << nCells
-                        << ". Inserting an empty cell.");
-        internalMesh->InsertNextCell(VTK_EMPTY_CELL, 0, cellPoints->GetPointer(0));
+        // sanity check. bad values should have been removed before this
+        vtkWarningMacro(<< "cellLabels id " << cellId << " exceeds the number of cells " << nCells);
         continue;
       }
-      arrayId->SetValue(cellI, cellId);
     }
 
     meshCells.GetCell(cellId, cellFaces);
@@ -7173,7 +7239,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
 
         // calculate cell centroid and insert it to point list
         vtkDataArray* polyCellPoints;
-        if (cellList64Bit)
+        if (cellLabels64Bit)
         {
           polyCellPoints = vtkTypeInt64Array::New();
         }
@@ -7197,7 +7263,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
             bool foundDup = false;
             for (vtkIdType l = 0; l < polyCellPoints->GetDataSize(); l++)
             {
-              const vtkTypeInt64 polyCellPointi = GetLabelValue(polyCellPoints, l, cellList64Bit);
+              const vtkTypeInt64 polyCellPointi = GetLabelValue(polyCellPoints, l, cellLabels64Bit);
               if (polyCellPointi == faceJPointK)
               {
                 foundDup = true;
@@ -7206,7 +7272,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
             }
             if (!foundDup)
             {
-              AppendLabelValue(polyCellPoints, faceJPointK, cellList64Bit);
+              AppendLabelValue(polyCellPoints, faceJPointK, cellLabels64Bit);
               const float* tuple = pointArray->GetPointer(3 * faceJPointK);
               centroid[0] += static_cast<double>(tuple[0]);
               centroid[1] += static_cast<double>(tuple[1]);
@@ -7504,24 +7570,24 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
 // insert faces to grid
 void vtkOpenFOAMReaderPrivate::InsertFacesToGrid(vtkPolyData* boundaryMesh,
   const vtkFoamLabelListList& meshFaces, vtkIdType startFace, vtkIdType endFace,
-  vtkDataArray* boundaryPointMap, vtkIdList* facePointsVtkId, vtkDataArray* labels,
+  vtkDataArray* boundaryPointMap, vtkIdList* facePointsVtkId, vtkIdList* faceLabels,
   bool isLookupValue)
 {
   vtkPolyData& bm = *boundaryMesh;
 
-  const bool faceLabels64Bit = ::Is64BitArray(labels);
+  // Limits
+  const vtkIdType maxLabels = this->FaceOwner->GetNumberOfTuples(); // NumFaces
 
-  for (vtkIdType j = startFace; j < endFace; j++)
+  for (vtkIdType facei = startFace; facei < endFace; ++facei)
   {
-    vtkIdType faceId = j;
-    if (labels != nullptr)
+    vtkIdType faceId = facei;
+    if (faceLabels != nullptr)
     {
-      faceId = GetLabelValue(labels, j, faceLabels64Bit);
-      if (faceId >= this->FaceOwner->GetNumberOfTuples())
+      faceId = faceLabels->GetId(facei);
+      if (faceId < 0 || faceId >= maxLabels)
       {
-        vtkWarningMacro(<< "faceLabels id " << faceId << " exceeds the number of faces "
-                        << this->FaceOwner->GetNumberOfTuples());
-        bm.InsertNextCell(VTK_EMPTY_CELL, 0, facePointsVtkId->GetPointer(0));
+        // sanity check. bad values should have been removed before this
+        vtkWarningMacro(<< "faceLabels id " << faceId << " exceeds number of faces " << maxLabels);
         continue;
       }
     }
@@ -7628,11 +7694,6 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     nBoundaryPointsList->SetValue(patchi, nPoints);
   }
 
-  // Allocate array for converting int vector to vtkIdType List:
-  // workaround for 64bit machines
-  vtkNew<vtkIdList> facePointsVtkId;
-  facePointsVtkId->SetNumberOfIds(maxNFacePoints);
-
   // Use same integer width as per faces
   const bool meshPoints64Bit = meshFaces.IsLabel64();
 
@@ -7697,6 +7758,10 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     }
   }
 
+  // A per-face scratch array
+  vtkNew<vtkIdList> facePointsVtkId;
+  facePointsVtkId->SetNumberOfIds(maxNFacePoints);
+
   for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
   {
     const vtkFoamPatch& patch = patches[patchi];
@@ -8578,7 +8643,73 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   }
 
   // Handle cell zones
-  // ...
+  if (this->Parent->CopyDataToCellZones && this->CellZoneMesh)
+  {
+    auto* zoneMesh = this->CellZoneMesh;
+    auto& zoneMap = this->cellZoneMap;
+    unsigned int nZones = zoneMesh->GetNumberOfBlocks();
+
+    if (nZones && zoneMap.empty()) // sanity check
+    {
+      vtkWarningMacro(<< "No cellLabels saved for zones");
+      nZones = 0;
+    }
+
+    for (unsigned int zonei = 0; zonei < nZones; ++zonei)
+    {
+      auto* zm = vtkUnstructuredGrid::SafeDownCast(zoneMesh->GetBlock(zonei));
+
+      const vtkIdType nZoneCells = zm->GetNumberOfCells();
+      vtkIdList* cellLabels = nullptr;
+
+      const std::string zoneName = zoneMesh->GetMetaData(zonei)->Get(vtkCompositeDataSet::NAME());
+
+      {
+        cellLabels = zoneMap.findZone(zoneName);
+        if (cellLabels == nullptr)
+        {
+          if (nZoneCells) // sanity check
+          {
+            vtkWarningMacro(<< "No cellLabels saved for zone: " << zoneName);
+          }
+          continue;
+        }
+
+        const vtkIdType nLabels = cellLabels->GetNumberOfIds();
+        if (nLabels != nZoneCells) // sanity check
+        {
+          vtkWarningMacro(<< "Mismatch in cellLabels (" << nLabels << ") and number of cells ("
+                          << nZoneCells << ") for zone: " << zoneName);
+          continue;
+        }
+      }
+
+      vtkNew<vtkFloatArray> zoneCellData;
+      zoneCellData->SetNumberOfComponents(nComponents);
+      zoneCellData->SetNumberOfTuples(nZoneCells);
+
+      // Copy tuples from internalField
+      // Like SetTuple() without the extra checks
+      for (vtkIdType celli = 0; celli < nZoneCells; ++celli)
+      {
+        float* dstData = zoneCellData->GetPointer(celli * nComponents);
+        const vtkIdType cellId = cellLabels->GetId(celli);
+        const float* srcData = iData->GetPointer(cellId * nComponents);
+
+        for (int cmpt = 0; cmpt < nComponents; ++cmpt)
+        {
+          dstData[cmpt] = srcData[cmpt];
+        }
+      }
+
+      // Set data to zone mesh
+      ::AddArrayToFieldData(zm->GetCellData(), zoneCellData, io.GetObjectName(), dimString);
+
+      // Point data temporarily unavailable (needs more reworking)
+      // // Copy points data
+      // zm->GetPointData()->ShallowCopy(this->InternalMesh->GetPointData());
+    }
+  }
 
   // The cell-to-point interpolated data for boundary cells
   vtkSmartPointer<vtkFloatArray> acData;
@@ -8774,6 +8905,97 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
       }
     }
   }
+
+  // Handle face zones, only possible if FaceOwner has not been truncated
+  if (this->Parent->CopyDataToCellZones && this->FaceZoneMesh && this->FaceNeigh)
+  {
+    auto& zoneMap = this->faceZoneMap;
+    auto* zoneMesh = this->FaceZoneMesh;
+    unsigned int nZones = zoneMesh->GetNumberOfBlocks();
+
+    if (nZones && zoneMap.empty()) // sanity check
+    {
+      vtkWarningMacro(<< "No faceLabels saved for zones");
+      nZones = 0;
+    }
+
+    // Or NumInternalFaces...
+    const vtkIdType nInternalFaces = this->FaceNeigh->GetNumberOfTuples();
+
+    for (unsigned int zonei = 0; zonei < nZones; ++zonei)
+    {
+      auto* zm = vtkPolyData::SafeDownCast(zoneMesh->GetBlock(zonei));
+
+      const vtkIdType nZoneFaces = zm->GetNumberOfCells();
+      vtkIdList* faceLabels = nullptr;
+
+      const std::string zoneName = zoneMesh->GetMetaData(zonei)->Get(vtkCompositeDataSet::NAME());
+
+      {
+        faceLabels = zoneMap.findZone(zoneName);
+        if (faceLabels == nullptr)
+        {
+          if (nZoneFaces) // sanity check
+          {
+            vtkWarningMacro(<< "No faceLabels saved for zone: " << zoneName);
+          }
+          continue;
+        }
+
+        const vtkIdType nLabels = faceLabels->GetNumberOfIds();
+        if (nLabels != nZoneFaces) // sanity check
+        {
+          vtkWarningMacro(<< "Mismatch in faceLabels (" << nLabels << ") and number of faces ("
+                          << nZoneFaces << ") for zone: " << zoneName);
+          continue;
+        }
+      }
+
+      vtkNew<vtkFloatArray> zoneCellData;
+      zoneCellData->SetNumberOfComponents(nComponents);
+      zoneCellData->SetNumberOfTuples(nZoneFaces);
+
+      // Copy tuples from internalField
+      // TODO: revise this to use boundaryField values...
+      for (vtkIdType facei = 0; facei < nZoneFaces; ++facei)
+      {
+        float* dstData = zoneCellData->GetPointer(facei * nComponents);
+        const vtkIdType faceId = faceLabels->GetId(facei);
+        const vtkIdType ownCell = GetLabelValue(this->FaceOwner, faceId, faceOwner64Bit);
+        const float* ownData = iData->GetPointer(ownCell * nComponents);
+
+        if (faceId < nInternalFaces)
+        {
+          // Internal face. Use average
+          const vtkIdType neiCell = GetLabelValue(this->FaceNeigh, faceId, faceOwner64Bit);
+          const float* neiData = iData->GetPointer(neiCell * nComponents);
+
+          for (int cmpt = 0; cmpt < nComponents; ++cmpt)
+          {
+            dstData[cmpt] = static_cast<float>(
+              0.5 * (static_cast<double>(ownData[cmpt]) + static_cast<double>(neiData[cmpt])));
+          }
+        }
+        else
+        {
+          // Boundary face.
+          // For now, just use owner side (cell) information.
+          // Revise/improve in the future (2021-02-04)
+          for (int cmpt = 0; cmpt < nComponents; ++cmpt)
+          {
+            dstData[cmpt] = ownData[cmpt];
+          }
+        }
+      }
+
+      // Set data to zone mesh
+      ::AddArrayToFieldData(zm->GetCellData(), zoneCellData, io.GetObjectName(), dimString);
+
+      // Point data temporarily unavailable (needs more reworking)
+      // // Copy points data
+      // zm->GetPointData()->ShallowCopy(this->InternalMesh->GetPointData());
+    }
+  }
 }
 
 //------------------------------------------------------------------------------
@@ -9127,12 +9349,18 @@ std::unique_ptr<vtkFoamDict> vtkOpenFOAMReaderPrivate::GatherBlocks(
 bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
   const vtkFoamLabelListList& meshCells, const vtkFoamLabelListList& meshFaces, vtkPoints* points)
 {
+  const bool supportFields = this->Parent->CopyDataToCellZones;
+
   typedef vtkUnstructuredGrid zoneVtkType;
   constexpr const char* const zonePrefix = "cellZone";
-  constexpr const char* const zoneTypeName = "cellZones";
+  constexpr const char* const zoneFileName = "cellZones";
   constexpr const char* const labelsName = "cellLabels";
+  const vtkIdType maxLabels = this->NumCells;
+  auto& zoneMap = cellZoneMap;
+
+  zoneMap.clearAll(); // Remove all old ids and errors
 
-  auto zonesDictPtr(this->GatherBlocks(zoneTypeName, false));
+  auto zonesDictPtr(this->GatherBlocks(zoneFileName, false));
   if (zonesDictPtr == nullptr)
   {
     // Not an error if mesh zones are missing
@@ -9140,11 +9368,13 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
   }
 
   const vtkFoamDict& zones = *zonesDictPtr;
-  // const bool use64BitLabels = zones.IsLabel64();
+  const bool use64BitLabels = zones.IsLabel64();
 
-  // Limits
+  vtkFoamError warnings;
   const unsigned nZones = static_cast<unsigned>(zones.size());
-  const vtkIdType maxLabels = this->NumCells;
+
+  // Detect duplicates
+  std::unordered_map<std::string, unsigned> zoneNames;
 
   for (unsigned zonei = 0; zonei < nZones; ++zonei)
   {
@@ -9177,22 +9407,53 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
       return false;
     }
 
+    // Detect duplicate zone names (being really paranoid)
+    {
+      auto insertion = zoneNames.emplace(zoneName, zonei);
+      if (!insertion.second)
+      {
+        vtkErrorMacro(<< zonePrefix << '/' << zoneName << " (zone:" << zonei
+                      << ") is duplicate of zone:" << insertion.first->second);
+        return false;
+      }
+    }
+
     vtkDataArray& labels = labelsEntry.LabelList();
     const vtkIdType nLabels = labels.GetNumberOfTuples();
-    if (nLabels > maxLabels)
+
+    // Transcribe into vtkIdList and remove questionable entries
+    auto elemIds = vtkSmartPointer<vtkIdList>::New();
+    elemIds->SetNumberOfIds(nLabels);
+
+    vtkIdType nUsed = 0;
+    for (vtkIdType idx = 0; idx < nLabels; ++idx)
     {
-      // Extremely improbable entry
-      vtkErrorMacro(<< "The length " << zonePrefix << '/' << zoneName << '=' << nLabels
-                    << " exceeds number of cells " << maxLabels);
-      return false;
+      const vtkIdType elemId = GetLabelValue(&labels, idx, use64BitLabels);
+      if (elemId >= 0 && elemId < maxLabels)
+      {
+        elemIds->SetId(nUsed, elemId);
+        ++nUsed;
+      }
+    }
+    if (nLabels != nUsed)
+    {
+      elemIds->Resize(nUsed);
+      warnings << zonePrefix << '/' << zoneName << " had " << (nLabels - nUsed)
+               << " out-of-range elements\n";
+    }
+
+    // Retain ids (in cache) for supporting fields
+    if (supportFields)
+    {
+      zoneMap.zones_[zoneName] = elemIds;
     }
 
     // Allocate new grid: we do not use resize() beforehand since it
     // could lead to undefined pointers if we return by error
-    zm->Allocate(nLabels);
+    zm->Allocate(nUsed);
 
     // Insert cells
-    this->InsertCellsToGrid(zm, meshCells, meshFaces, &labels);
+    this->InsertCellsToGrid(zm, meshCells, meshFaces, elemIds);
 
     // Set points for zone
     zm->SetPoints(points);
@@ -9200,6 +9461,11 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     ::SetBlock(zoneMesh, zonei, zm, zoneName);
   }
 
+  if (!warnings.empty())
+  {
+    vtkWarningMacro(<< warnings);
+  }
+
   return true;
 }
 
@@ -9209,12 +9475,18 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
   vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList& meshFaces, vtkPoints* points)
 {
+  const bool supportFields = this->Parent->CopyDataToCellZones;
+
   typedef vtkPolyData zoneVtkType;
   constexpr const char* const zonePrefix = "faceZone";
-  constexpr const char* const zoneTypeName = "faceZones";
+  constexpr const char* const zoneFileName = "faceZones";
   constexpr const char* const labelsName = "faceLabels";
+  const vtkIdType maxLabels = this->FaceOwner->GetNumberOfTuples(); // NumFaces
+  auto& zoneMap = faceZoneMap;
+
+  zoneMap.clearAll(); // Remove all old ids and errors
 
-  auto zonesDictPtr(this->GatherBlocks(zoneTypeName, false));
+  auto zonesDictPtr(this->GatherBlocks(zoneFileName, false));
   if (zonesDictPtr == nullptr)
   {
     // Not an error if mesh zones are missing
@@ -9224,9 +9496,21 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
   const vtkFoamDict& zones = *zonesDictPtr;
   const bool use64BitLabels = zones.IsLabel64();
 
-  // Limits
+  vtkFoamError warnings;
   const unsigned nZones = static_cast<unsigned>(zones.size());
-  const vtkIdType maxLabels = this->FaceOwner->GetNumberOfTuples(); // NumFaces
+
+  // Detect duplicates
+  std::unordered_map<std::string, unsigned> zoneNames;
+
+  // Additional bookkeeping for faceZones
+  const auto& patches = this->BoundaryDict;
+
+  // Ignore neighbour side of processor patches
+  const bool ignoreProcNeighbour = !this->ProcessorName.empty();
+  const vtkIdType nInternalFaces = this->NumInternalFaces;
+
+  // Size for per-face scratch array
+  vtkIdType maxNFacePoints = 16;
 
   for (unsigned zonei = 0; zonei < nZones; ++zonei)
   {
@@ -9259,37 +9543,78 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
       return false;
     }
 
+    // Detect duplicate zone names (being really paranoid)
+    {
+      auto insertion = zoneNames.emplace(zoneName, zonei);
+      if (!insertion.second)
+      {
+        vtkErrorMacro(<< zonePrefix << '/' << zoneName << " (zone:" << zonei
+                      << ") is duplicate of zone:" << insertion.first->second);
+        return false;
+      }
+    }
+
     vtkDataArray& labels = labelsEntry.LabelList();
     const vtkIdType nLabels = labels.GetNumberOfTuples();
-    if (nLabels > maxLabels)
+
+    // Transcribe into vtkIdList and remove questionable entries
+    auto elemIds = vtkSmartPointer<vtkIdList>::New();
+    elemIds->SetNumberOfIds(nLabels);
+
+    vtkIdType nUsed = 0, nNonOwner = 0;
+    for (vtkIdType idx = 0; idx < nLabels; ++idx)
     {
-      // Extremely improbable entry
-      vtkErrorMacro(<< "The length " << zonePrefix << '/' << zoneName << '=' << nLabels
-                    << " exceeds number of faces " << maxLabels);
-      return false;
-    }
+      const vtkIdType elemId = GetLabelValue(&labels, idx, use64BitLabels);
+      if (elemId >= 0 && elemId < maxLabels)
+      {
+        const vtkIdType patchId =
+          ((ignoreProcNeighbour && elemId >= nInternalFaces) ? patches.whichPatch(elemId) : -1);
 
-    // Allocate new grid: we do not use resize() beforehand since it
-    // could lead to undefined pointer if we return by error
-    zm->AllocateEstimate(nLabels, 1);
+        // NB: the test for patch owner is always true for non-processor patches
+        if (patchId >= 0 && !patches[patchId].owner_)
+        {
+          ++nNonOwner;
+        }
+        else
+        {
+          elemIds->SetId(nUsed, elemId);
+          ++nUsed;
 
-    // allocate array for converting int vector to vtkIdType vector:
-    // workaround for 64bit machines
-    vtkIdType maxNFacePoints = 0;
-    for (vtkIdType labeli = 0; labeli < nLabels; ++labeli)
+          // For scratch array
+          const vtkIdType nFacePoints = meshFaces.GetSize(elemId);
+          if (maxNFacePoints < nFacePoints)
+          {
+            maxNFacePoints = nFacePoints;
+          }
+        }
+      }
+    }
+    if (nLabels != nUsed)
     {
-      vtkIdType nFacePoints = meshFaces.GetSize(GetLabelValue(&labels, labeli, use64BitLabels));
-      if (maxNFacePoints < nFacePoints)
+      elemIds->Resize(nUsed);
+      if (nLabels != (nUsed + nNonOwner))
       {
-        maxNFacePoints = nFacePoints;
+        warnings << zonePrefix << '/' << zoneName << " had " << (nLabels - (nUsed + nNonOwner))
+                 << " out-of-range elements\n";
       }
     }
+
+    // Retain ids (in cache) for supporting fields
+    if (supportFields)
+    {
+      zoneMap.zones_[zoneName] = elemIds;
+    }
+
+    // Per-face scratch array
     vtkNew<vtkIdList> facePointsVtkId;
     facePointsVtkId->SetNumberOfIds(maxNFacePoints);
 
+    // Allocate new grid: we do not use resize() beforehand since it
+    // could lead to undefined pointer if we return by error
+    zm->AllocateEstimate(nUsed, 1);
+
     // Insert faces
-    this->InsertFacesToGrid(zm, meshFaces, 0, nLabels, nullptr, facePointsVtkId, &labels, false);
-    facePointsVtkId->Delete();
+    this->InsertFacesToGrid(zm, meshFaces, 0, nUsed, nullptr, facePointsVtkId, elemIds, false);
 
     // Set points for zone
     zm->SetPoints(points);
@@ -9297,6 +9622,11 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
     ::SetBlock(zoneMesh, zonei, zm, zoneName);
   }
 
+  if (!warnings.empty())
+  {
+    vtkWarningMacro(<< warnings);
+  }
+
   return true;
 }
 
@@ -9305,13 +9635,19 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
 
 bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh, vtkPoints* points)
 {
+  const bool supportFields = false; // this->Parent->CopyDataToCellZones;
+
   typedef vtkPolyData zoneVtkType;
   constexpr const char* const zonePrefix = "pointZone";
-  constexpr const char* const zoneTypeName = "pointZones";
+  constexpr const char* const zoneFileName = "pointZones";
   constexpr const char* const labelsName = "pointLabels";
+  const vtkIdType maxLabels = this->NumPoints;
+  auto& zoneMap = pointZoneMap;
 
-  auto zonesDictPtr(this->GatherBlocks(zoneTypeName, false));
-  if (!zonesDictPtr)
+  zoneMap.clearAll(); // Remove all old ids and errors
+
+  auto zonesDictPtr(this->GatherBlocks(zoneFileName, false));
+  if (zonesDictPtr == nullptr)
   {
     // Not an error if mesh zones are missing
     return true;
@@ -9320,9 +9656,11 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
   const vtkFoamDict& zones = *zonesDictPtr;
   const bool use64BitLabels = zones.IsLabel64();
 
-  // Limits
+  vtkFoamError warnings;
   const unsigned nZones = static_cast<unsigned>(zones.size());
-  const vtkIdType maxLabels = this->NumPoints;
+
+  // Detect duplicates
+  std::unordered_map<std::string, unsigned> zoneNames;
 
   for (unsigned zonei = 0; zonei < nZones; ++zonei)
   {
@@ -9355,36 +9693,60 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
       return false;
     }
 
+    // Detect duplicate zone names (being really paranoid)
+    {
+      auto insertion = zoneNames.emplace(zoneName, zonei);
+      if (!insertion.second)
+      {
+        vtkErrorMacro(<< zonePrefix << '/' << zoneName << " (zone:" << zonei
+                      << ") is duplicate of zone:" << insertion.first->second);
+        return false;
+      }
+    }
+
     vtkDataArray& labels = labelsEntry.LabelList();
     const vtkIdType nLabels = labels.GetNumberOfTuples();
-    if (nLabels > maxLabels)
+
+    // Transcribe into vtkIdList and remove questionable entries
+    // Not completely necessary since the VTK_VERTEX has the value anyhow, but do it
+    // to filter out potentially bad entries and be more similar to cell/face zones.
+    // - besides which, not many point sets being used anyhow.
+
+    auto elemIds = vtkSmartPointer<vtkIdList>::New();
+    elemIds->SetNumberOfIds(nLabels);
+
+    vtkIdType nUsed = 0;
+    for (vtkIdType idx = 0; idx < nLabels; ++idx)
     {
-      // Extremely improbable entry
-      vtkErrorMacro(<< "The length " << zonePrefix << '/' << zoneName << '=' << nLabels
-                    << " exceeds number of points " << maxLabels);
-      return false;
+      const vtkIdType elemId = GetLabelValue(&labels, idx, use64BitLabels);
+      if (elemId >= 0 && elemId < maxLabels)
+      {
+        elemIds->SetId(nUsed, elemId);
+        ++nUsed;
+      }
+    }
+    if (nLabels != nUsed)
+    {
+      elemIds->Resize(nUsed);
+      warnings << zonePrefix << '/' << zoneName << " had " << (nLabels - nUsed)
+               << " out-of-range elements\n";
+    }
+
+    // Retain ids (in cache) for supporting fields
+    if (supportFields)
+    {
+      zoneMap.zones_[zoneName] = elemIds;
     }
 
     // Allocate new grid: we do not use resize() beforehand since it
     // could lead to undefined pointer if we return by error
-    zm->AllocateEstimate(nLabels, 1);
+    zm->AllocateEstimate(nUsed, 1);
 
-    // Insert points
-    for (vtkIdType labeli = 0; labeli < nLabels; ++labeli)
+    // Insert vertex cells
+    for (vtkIdType pointi = 0; pointi < nUsed; ++pointi)
     {
-      vtkIdType pointLabel =
-        static_cast<vtkIdType>(GetLabelValue(&labels, labeli, use64BitLabels)); // must be vtkIdType
-
-      if (pointLabel < maxLabels)
-      {
-        zm->InsertNextCell(VTK_VERTEX, 1, &pointLabel);
-      }
-      else
-      {
-        zm->InsertNextCell(VTK_EMPTY_CELL, 0, &pointLabel);
-        vtkWarningMacro(<< labelsName << " id " << pointLabel << " exceeds number of points "
-                        << maxLabels);
-      }
+      const vtkIdType elemId = elemIds->GetId(pointi);
+      zm->InsertNextCell(VTK_VERTEX, 1, &elemId);
     }
 
     // Set points for zone
@@ -9393,6 +9755,11 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     ::SetBlock(zoneMesh, zonei, zm, zoneName);
   }
 
+  if (!warnings.empty())
+  {
+    vtkWarningMacro(<< warnings);
+  }
+
   return true;
 }
 
@@ -9524,12 +9891,6 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   {
     // Read polyMesh/{owner,neighbour}, create FaceOwner/FaceNeigh and meshCells vectors
     meshCells = this->ReadOwnerNeighbourFiles(meshDir);
-    if (this->FaceNeigh)
-    {
-      // Transitional code - do not yet use neighbour information
-      this->FaceNeigh->Delete();
-      this->FaceNeigh = nullptr;
-    }
     if (!meshCells)
     {
       return 0;
@@ -9580,48 +9941,40 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
       points = tmpPoints;
     }
 
-    this->PointZoneMesh = vtkMultiBlockDataSet::New();
-    if (!this->GetPointZoneMesh(this->PointZoneMesh, points))
-    {
-      this->ClearZoneMeshes();
-      return 0;
-    }
-    if (this->PointZoneMesh->GetNumberOfBlocks() == 0)
+    this->CellZoneMesh = vtkMultiBlockDataSet::New();
+    if (!this->GetCellZoneMesh(this->CellZoneMesh, *meshCells, *meshFaces, points) ||
+      this->CellZoneMesh->GetNumberOfBlocks() == 0)
     {
-      this->PointZoneMesh->Delete();
-      this->PointZoneMesh = nullptr;
+      this->cellZoneMap.clearAll();
+      this->CellZoneMesh->Delete();
+      this->CellZoneMesh = nullptr;
     }
 
     this->FaceZoneMesh = vtkMultiBlockDataSet::New();
-    if (!this->GetFaceZoneMesh(this->FaceZoneMesh, *meshFaces, points))
-    {
-      this->ClearZoneMeshes();
-      return 0;
-    }
-    if (this->FaceZoneMesh->GetNumberOfBlocks() == 0)
+    if (!this->GetFaceZoneMesh(this->FaceZoneMesh, *meshFaces, points) ||
+      this->FaceZoneMesh->GetNumberOfBlocks() == 0)
     {
+      this->faceZoneMap.clearAll();
       this->FaceZoneMesh->Delete();
       this->FaceZoneMesh = nullptr;
     }
 
-    this->CellZoneMesh = vtkMultiBlockDataSet::New();
-    if (!this->GetCellZoneMesh(this->CellZoneMesh, *meshCells, *meshFaces, points))
-    {
-      this->ClearZoneMeshes();
-      return 0;
-    }
-    if (this->CellZoneMesh->GetNumberOfBlocks() == 0)
+    this->PointZoneMesh = vtkMultiBlockDataSet::New();
+    if (!this->GetPointZoneMesh(this->PointZoneMesh, points) ||
+      this->PointZoneMesh->GetNumberOfBlocks() == 0)
     {
-      this->CellZoneMesh->Delete();
-      this->CellZoneMesh = nullptr;
+      this->pointZoneMap.clearAll();
+      this->PointZoneMesh->Delete();
+      this->PointZoneMesh = nullptr;
     }
   }
 
   // Don't need meshCells beyond here
   meshCells.reset(nullptr);
 
-  // Only need boundary face owners beyond here
-  if (createEulerians && recreateInternalMesh)
+  // Only need boundary face owners beyond here,
+  // except if we have faceZones, then we still need them
+  if (createEulerians && recreateInternalMesh && !this->FaceZoneMesh)
   {
     this->TruncateFaceOwner();
   }
@@ -9669,23 +10022,26 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
 
     if (this->PointZoneMesh != nullptr)
     {
-      for (unsigned int i = 0; i < this->PointZoneMesh->GetNumberOfBlocks(); i++)
+      auto* zoneMesh = this->PointZoneMesh;
+      for (unsigned int zonei = 0; zonei < zoneMesh->GetNumberOfBlocks(); ++zonei)
       {
-        vtkPolyData::SafeDownCast(this->PointZoneMesh->GetBlock(i))->SetPoints(points);
+        vtkPolyData::SafeDownCast(zoneMesh->GetBlock(zonei))->SetPoints(points);
       }
     }
     if (this->FaceZoneMesh != nullptr)
     {
-      for (unsigned int i = 0; i < this->FaceZoneMesh->GetNumberOfBlocks(); i++)
+      auto* zoneMesh = this->FaceZoneMesh;
+      for (unsigned int zonei = 0; zonei < zoneMesh->GetNumberOfBlocks(); ++zonei)
       {
-        vtkPolyData::SafeDownCast(this->FaceZoneMesh->GetBlock(i))->SetPoints(points);
+        vtkPolyData::SafeDownCast(zoneMesh->GetBlock(zonei))->SetPoints(points);
       }
     }
     if (this->CellZoneMesh != nullptr)
     {
-      for (unsigned int i = 0; i < this->CellZoneMesh->GetNumberOfBlocks(); i++)
+      auto* zoneMesh = this->CellZoneMesh;
+      for (unsigned int zonei = 0; zonei < zoneMesh->GetNumberOfBlocks(); ++zonei)
       {
-        vtkUnstructuredGrid::SafeDownCast(this->CellZoneMesh->GetBlock(i))->SetPoints(points);
+        vtkUnstructuredGrid::SafeDownCast(zoneMesh->GetBlock(zonei))->SetPoints(points);
       }
     }
   }
@@ -9727,6 +10083,41 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
       }
     }
 
+    // Zones. This may need some reworking...
+    if (!recreateInternalMesh)
+    {
+      if (this->CellZoneMesh != nullptr)
+      {
+        auto* zoneMesh = this->CellZoneMesh;
+        for (unsigned int zonei = 0; zonei < zoneMesh->GetNumberOfBlocks(); ++zonei)
+        {
+          auto* zm = vtkUnstructuredGrid::SafeDownCast(zoneMesh->GetBlock(zonei));
+          zm->GetCellData()->Initialize();
+          zm->GetPointData()->Initialize();
+        }
+      }
+      if (this->FaceZoneMesh != nullptr)
+      {
+        auto* zoneMesh = this->FaceZoneMesh;
+        for (unsigned int zonei = 0; zonei < zoneMesh->GetNumberOfBlocks(); ++zonei)
+        {
+          auto* zm = vtkPolyData::SafeDownCast(zoneMesh->GetBlock(zonei));
+          zm->GetCellData()->Initialize();
+          zm->GetPointData()->Initialize();
+        }
+      }
+      if (this->PointZoneMesh != nullptr)
+      {
+        auto* zoneMesh = this->PointZoneMesh;
+        for (unsigned int zonei = 0; zonei < zoneMesh->GetNumberOfBlocks(); ++zonei)
+        {
+          auto* zm = vtkPolyData::SafeDownCast(zoneMesh->GetBlock(zonei));
+          zm->GetCellData()->Initialize();
+          zm->GetPointData()->Initialize();
+        }
+      }
+    }
+
     // read field data variables into Internal/Boundary meshes
     vtkIdType nFieldsRead = 0;
     const vtkIdType nFieldsToRead = (this->VolFieldFiles->GetNumberOfValues() +
@@ -9756,30 +10147,6 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     lagrangianMesh = this->MakeLagrangianMesh();
   }
 
-  if (this->InternalMesh && this->Parent->CopyDataToCellZones && this->CellZoneMesh)
-  {
-    for (unsigned int i = 0; i < this->CellZoneMesh->GetNumberOfBlocks(); i++)
-    {
-      auto* ug = vtkUnstructuredGrid::SafeDownCast(this->CellZoneMesh->GetBlock(i));
-      auto* idArray = vtkIdTypeArray::SafeDownCast(ug->GetCellData()->GetArray("CellId"));
-
-      // allocate arrays, cellId array will be removed
-      ug->GetCellData()->CopyAllocate(this->InternalMesh->GetCellData(), ug->GetNumberOfCells());
-
-      // copy tuples
-      for (vtkIdType j = 0; j < ug->GetNumberOfCells(); j++)
-      {
-        ug->GetCellData()->CopyData(this->InternalMesh->GetCellData(), idArray->GetValue(j), j);
-      }
-
-      // we need to add the id array because it has been previously removed
-      ug->GetCellData()->AddArray(idArray);
-
-      // copy points data
-      ug->GetPointData()->ShallowCopy(this->InternalMesh->GetPointData());
-    }
-  }
-
   // Add Internal mesh to final output only if selected for display
   if (this->InternalMesh != nullptr)
   {
@@ -9819,7 +10186,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     {
       ::AppendBlock(zones, this->PointZoneMesh, "pointZones");
     }
-    if (zones->GetNumberOfBlocks() != 0)
+    if (zones->GetNumberOfBlocks())
     {
       ::AppendBlock(output, zones, "zones");
     }
@@ -9887,9 +10254,10 @@ vtkOpenFOAMReader::vtkOpenFOAMReader()
   this->PositionsIsIn13Format = 1;
   this->PositionsIsIn13FormatOld = 1;
 
-  // for reading zones
+  // Zone handling
   this->ReadZones = 0; // turned off by default
   this->ReadZonesOld = 0;
+  this->CopyDataToCellZones = true;
 
   // Ignore 0/ time directory, which is normally missing Lagrangian fields
   this->SkipZeroTime = false;
@@ -9912,7 +10280,6 @@ vtkOpenFOAMReader::vtkOpenFOAMReader()
   this->Use64BitFloats = true;
   this->Use64BitLabelsOld = false;
   this->Use64BitFloatsOld = true;
-  this->CopyDataToCellZones = false;
 }
 
 //------------------------------------------------------------------------------
-- 
GitLab


From 6d7d4a2ef0ee3861cbc145586ccd1ddfe96d48b8 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Tue, 2 Feb 2021 14:53:52 +0100
Subject: [PATCH 11/36] openfoam: refactor non-uniform list reading (code
 reduction)

- rationalize references to token types

- closes merge-request !6670
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 578 +++++++++++++++---------------
 1 file changed, 288 insertions(+), 290 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 60e1f566cb9..74d93aaacfc 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -809,30 +809,41 @@ struct vtkFoamTypes
   enum dataType
   {
     NO_TYPE = 0,
-    LABEL_TYPE = 0x11,
     SCALAR_TYPE = 1,
     VECTOR_TYPE = 3,
     SYMM_TENSOR_TYPE = 6,
     TENSOR_TYPE = 9,
-    SPH_TENSOR_TYPE = 0x21
+    // Single-component types, but disambiguate from SCALAR_TYPE
+    BOOL_TYPE = (0x10 | SCALAR_TYPE),
+    LABEL_TYPE = (0x20 | SCALAR_TYPE),
+    SPH_TENSOR_TYPE = (0x30 | SCALAR_TYPE)
   };
 
   // The number of data components
   static int GetNumberOfComponents(const dataType dtype) noexcept { return (dtype & 0xF); }
 
-  static bool IsLabel(const dataType dtype) noexcept { return dtype == LABEL_TYPE; }
-  static bool IsScalar(const dataType dtype) noexcept { return dtype == SCALAR_TYPE; }
-  static bool IsNumeric(const dataType dtype) noexcept { return IsLabel(dtype) || IsScalar(dtype); }
+  static bool IsGood(dataType dtype) noexcept { return dtype != NO_TYPE; }
+  static bool IsBool(dataType dtype) noexcept { return dtype == BOOL_TYPE; }
+  static bool IsLabel(dataType dtype) noexcept { return dtype == LABEL_TYPE; }
+  static bool IsScalar(dataType dtype) noexcept { return dtype == SCALAR_TYPE; }
+  static bool IsNumeric(dataType dtype) noexcept { return IsLabel(dtype) || IsScalar(dtype); }
 
   // Is a VectorSpace type?
-  static bool IsVectorSpace(const dataType dtype) noexcept
+  static bool IsVectorSpace(dataType dtype) noexcept
   {
     return GetNumberOfComponents(dtype) > 1 || dtype == SPH_TENSOR_TYPE;
   }
 
   // Parse things like "scalarField" or "ScalarField" -> SCALAR_TYPE etc.
-  // Ignore case on first letter, which makes it convenient for "volScalarField" too.
-  static dataType ToEnum(const std::string& fieldType, size_t pos = 0);
+  // Ignore case on first letter (at pos), which makes it convenient for "volScalarField" too.
+  static dataType FieldToEnum(const std::string& fieldTypeName, size_t pos = 0);
+
+  // Handle "List<scalar>" -> SCALAR_TYPE etc.
+  static dataType ListToEnum(const std::string& listTypeName);
+
+private:
+  // Implementation for FieldToEnum, ListToEnum
+  static dataType ToEnumImpl(const std::string& str, size_t pos, size_t len, bool ignoreCase);
 };
 
 //------------------------------------------------------------------------------
@@ -1114,79 +1125,126 @@ void AddArrayToFieldData(vtkDataSetAttributes* fieldData, vtkDataArray* array,
 //------------------------------------------------------------------------------
 // Simple handling of common OpenFOAM data types
 
-vtkFoamTypes::dataType vtkFoamTypes::ToEnum(const std::string& fieldType, size_t pos)
+// Low-level implementation
+vtkFoamTypes::dataType vtkFoamTypes::ToEnumImpl(
+  const std::string& str, size_t pos, size_t last, bool ignoreCase)
 {
   vtkFoamTypes::dataType dtype(vtkFoamTypes::NO_TYPE);
 
-  const char firstChar = fieldType[pos];
-  ++pos; // First character is handled separately (for ignoring case)
+  char firstChar = str[pos];
+  if (ignoreCase)
+  {
+    firstChar = std::tolower(firstChar);
+  }
+  ++pos; // First character handled separately (for ignoring case)
 
-  size_t len = fieldType.find("Field", pos);
-  if (len != std::string::npos)
+  size_t len = std::string::npos;
+  if (last != std::string::npos)
   {
-    len -= pos;
+    if (last > pos)
+    {
+      len = last - pos;
+    }
+    else
+    {
+      // Caught bad input
+      firstChar = '\0';
+    }
   }
 
   switch (firstChar)
   {
-    case 'L':
+    case '\0':
+    {
+      break;
+    }
+
+    case 'b':
+    {
+      if (str.compare(pos, len, "ool") == 0)
+      {
+        // (Bool | bool)
+        dtype = vtkFoamTypes::BOOL_TYPE;
+      }
+      break;
+    }
+
     case 'l':
     {
-      if (fieldType.compare(pos, len, "abel") == 0)
+      if (str.compare(pos, len, "abel") == 0)
       {
         // (Label | label)
         dtype = vtkFoamTypes::LABEL_TYPE;
       }
+      break;
     }
-    break;
 
-    case 'S':
     case 's':
     {
-      if (fieldType.compare(pos, len, "calar") == 0)
+      if (str.compare(pos, len, "calar") == 0)
       {
         // (Scalar | scalar)
         dtype = vtkFoamTypes::SCALAR_TYPE;
       }
-      else if (fieldType.compare(pos, len, "phericalTensor") == 0)
+      else if (str.compare(pos, len, "phericalTensor") == 0)
       {
         // (SphericalTensor | sphericalTensor)
         dtype = vtkFoamTypes::SPH_TENSOR_TYPE;
       }
-      else if (fieldType.compare(pos, len, "ymmTensor") == 0)
+      else if (str.compare(pos, len, "ymmTensor") == 0)
       {
         // (SymmTensor | symmTensor)
         dtype = vtkFoamTypes::SYMM_TENSOR_TYPE;
       }
+      break;
     }
-    break;
 
-    case 'T':
     case 't':
     {
-      if (fieldType.compare(pos, len, "ensor") == 0)
+      if (str.compare(pos, len, "ensor") == 0)
       {
         // (Tensor | tensor)
         dtype = vtkFoamTypes::TENSOR_TYPE;
       }
+      break;
     }
-    break;
 
-    case 'V':
     case 'v':
     {
-      if (fieldType.compare(pos, len, "ector") == 0)
+      if (str.compare(pos, len, "ector") == 0)
       {
         // (Vector | vector)
         dtype = vtkFoamTypes::VECTOR_TYPE;
       }
+      break;
     }
-    break;
   }
 
   return dtype;
 }
 
+// Fields: expects scalarField, volScalarField etc.
+vtkFoamTypes::dataType vtkFoamTypes::FieldToEnum(const std::string& fieldTypeName, size_t pos)
+{
+  // With ignoreCase
+  return vtkFoamTypes::ToEnumImpl(fieldTypeName, pos, fieldTypeName.find("Field", pos), true);
+}
+
+// Lists: expects "List<scalar>", "List<vector>" etc.
+vtkFoamTypes::dataType vtkFoamTypes::ListToEnum(const std::string& listTypeName)
+{
+  const auto endp = listTypeName.find('>');
+
+  if ((endp != std::string::npos) && (endp + 1 == listTypeName.length()) &&
+    listTypeName.compare(0, 5, "List<") == 0)
+  {
+    // Without ignoreCase
+    return vtkFoamTypes::ToEnumImpl(listTypeName, 5, endp, false);
+  }
+
+  return vtkFoamTypes::NO_TYPE;
+}
+
 //------------------------------------------------------------------------------
 // class vtkFoamStreamOption
 // Some elements from Foam::IOstreamOption and from Foam::IOstream
@@ -1289,14 +1347,14 @@ public:
     STRING,
     IDENTIFIER,
     // List types (vtkObject-derived)
-    STRINGLIST,
+    BOOLLIST,
     LABELLIST,
     SCALARLIST,
     VECTORLIST,
+    STRINGLIST,
     // List types (non-vtkObject)
     LABELLISTLIST,
     ENTRYVALUELIST,
-    BOOLLIST,
     EMPTYLIST,
     DICTIONARY,
     // error state
@@ -1314,10 +1372,11 @@ protected:
     std::string* String;
     // List types (vtkObject-derived)
     vtkObjectBase* VtkObjectPtr;
-    vtkStringArray* StringListPtr;
+    vtkTypeInt8Array* BoolListPtr;
+    vtkDataArray* LabelListPtr;
     vtkFloatArray* ScalarListPtr;
     vtkFloatArray* VectorListPtr;
-    vtkDataArray* LabelListPtr;
+    vtkStringArray* StringListPtr;
     // List types (non-vtkObject)
     vtkFoamLabelListList* LabelListListPtr;
     vtkFoamPtrList<vtkFoamEntryValue>* EntryValuePtrs;
@@ -1326,7 +1385,7 @@ protected:
 
   void Clear()
   {
-    if (this->Type == STRING || this->Type == IDENTIFIER)
+    if (this->Type == STRING || this->Type == IDENTIFIER) // IsStringType
     {
       delete this->String;
     }
@@ -1349,17 +1408,7 @@ protected:
       case IDENTIFIER:
         this->String = new std::string(*tok.String);
         break;
-      case UNDEFINED:
-      case STRINGLIST:
-      case LABELLIST:
-      case SCALARLIST:
-      case VECTORLIST:
-      case LABELLISTLIST:
-      case ENTRYVALUELIST:
-      case BOOLLIST:
-      case EMPTYLIST:
-      case DICTIONARY:
-      case TOKEN_ERROR:
+      default:
         break;
     }
   }
@@ -1402,10 +1451,13 @@ public:
   double To<double>() const;
 #endif
 
-  // True if token represents punctuation
+  // Token represents punctuation
   bool IsPunctuation() const noexcept { return this->Type == PUNCTUATION; }
 
-  // True if token represents a numerical value
+  // Token represents a numerical value
+  bool IsLabel() const noexcept { return this->Type == LABEL || this->Type == SCALAR; }
+
+  // Token represents a numerical value
   bool IsNumeric() const noexcept { return this->Type == LABEL || this->Type == SCALAR; }
 
   vtkTypeInt64 ToInt() const
@@ -1428,6 +1480,9 @@ public:
                                : this->Type == SCALAR ? this->Double : 0.0;
   }
 
+  // Token represents string content
+  bool IsStringType() const noexcept { return this->Type == STRING || this->Type == IDENTIFIER; }
+
   std::string ToString() const { return *this->String; }
   std::string ToIdentifier() const { return *this->String; }
 
@@ -3455,7 +3510,11 @@ public:
   }
 
   template <vtkFoamToken::tokenType listType, typename traitsT>
-  void ReadNonuniformList(vtkFoamIOobject& io);
+  void ReadNonUniformList(vtkFoamIOobject& io);
+
+  // Dispatch reading of uniform list based on the field data type (scalar, vector etc).
+  // Return false if could not be dispatched
+  bool ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::dataType fieldDataType);
 
   // reads a list of labelLists. requires size prefix of the listList
   // to be present. size of each sublist must also be present in the
@@ -3477,7 +3536,7 @@ public:
     {
       throw vtkFoamError() << "Unexpected EOF";
     }
-    if (currToken.GetType() == vtkFoamToken::LABEL)
+    if (currToken.IsLabel())
     {
       const vtkTypeInt64 listLen = currToken.To<vtkTypeInt64>();
       if (listLen < 0)
@@ -3504,7 +3563,7 @@ public:
         {
           throw vtkFoamError() << "Unexpected EOF";
         }
-        if (currToken.GetType() == vtkFoamToken::LABEL)
+        if (currToken.IsLabel())
         {
           const vtkTypeInt64 sublistLen = currToken.To<vtkTypeInt64>();
           if (sublistLen < 0)
@@ -3542,7 +3601,7 @@ public:
           this->Superclass::LabelListListPtr->SetOffset(idx, nTotalElems);
           while (io.Read(currToken) && currToken != ')')
           {
-            if (currToken.GetType() != vtkFoamToken::LABEL)
+            if (!currToken.IsLabel())
             {
               throw vtkFoamError() << "Expected an integer, found " << currToken;
             }
@@ -3598,7 +3657,7 @@ public:
       {
         throw vtkFoamError() << "Unexpected EOF";
       }
-      if (currToken.GetType() == vtkFoamToken::LABEL)
+      if (currToken.IsLabel())
       {
         vtkTypeInt64 listLen = currToken.To<vtkTypeInt64>();
         if (listLen < 0)
@@ -3631,86 +3690,14 @@ public:
   {
     this->SetStreamOption(io);
 
+    // Basic field types: "boolField", "labelField", "scalarField" ...
+    vtkFoamTypes::dataType listDataType(vtkFoamTypes::FieldToEnum(io.GetClassName()));
+
     try
     {
-      // lagrangian labels (cf. gnemdFoam/nanoNozzle)
-      if (io.GetClassName() == "labelField")
+      if (vtkFoamTypes::IsGood(listDataType))
       {
-        if (io.IsLabel64())
-        {
-          this->ReadNonuniformList<LABELLIST, listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
-        }
-        else
-        {
-          this->ReadNonuniformList<LABELLIST, listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
-        }
-      }
-      // lagrangian scalars
-
-      else if (io.GetClassName() == "scalarField")
-      {
-        if (io.IsFloat64())
-        {
-          this->ReadNonuniformList<SCALARLIST, listTraits<vtkFloatArray, double>>(io);
-        }
-        else
-        {
-          this->ReadNonuniformList<SCALARLIST, listTraits<vtkFloatArray, float>>(io);
-        }
-      }
-      else if (io.GetClassName() == "sphericalTensorField")
-      {
-        if (io.IsFloat64())
-        {
-          this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 1, false>>(
-            io);
-        }
-        else
-        {
-          this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 1, false>>(
-            io);
-        }
-      }
-      // polyMesh/points, lagrangian vectors
-
-      else if (io.GetClassName() == "vectorField")
-      {
-        if (io.IsFloat64())
-        {
-          this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 3, false>>(
-            io);
-        }
-        else
-        {
-          this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 3, false>>(
-            io);
-        }
-      }
-      else if (io.GetClassName() == "symmTensorField")
-      {
-        if (io.IsFloat64())
-        {
-          this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 6, false>>(
-            io);
-        }
-        else
-        {
-          this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 6, false>>(
-            io);
-        }
-      }
-      else if (io.GetClassName() == "tensorField")
-      {
-        if (io.IsFloat64())
-        {
-          this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 9, false>>(
-            io);
-        }
-        else
-        {
-          this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 9, false>>(
-            io);
-        }
+        this->ReadNonUniformList(io, listDataType);
       }
       else
       {
@@ -3729,7 +3716,7 @@ public:
 // generic reader for nonuniform lists. requires size prefix of the
 // list to be present in the stream if the format is binary.
 template <vtkFoamToken::tokenType listType, typename traitsT>
-void vtkFoamEntryValue::ReadNonuniformList(vtkFoamIOobject& io)
+void vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io)
 {
   this->SetStreamOption(io);
 
@@ -3796,6 +3783,107 @@ void vtkFoamEntryValue::ReadNonuniformList(vtkFoamIOobject& io)
   }
 }
 
+// Dispatch known field/list types for non-uniform reading
+bool vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::dataType listDataType)
+{
+  bool handled = true;
+  switch (listDataType)
+  {
+    case vtkFoamTypes::BOOL_TYPE:
+    {
+      // List<bool> is read as a list of bytes (binary) or ints (ascii)
+      // - primary location is the flipMap entry in faceZones
+      this->ReadNonUniformList<BOOLLIST, listTraits<vtkTypeInt8Array, vtkTypeInt8>>(io);
+      break;
+    }
+
+    case vtkFoamTypes::LABEL_TYPE:
+    {
+      if (io.IsLabel64())
+      {
+        this->ReadNonUniformList<LABELLIST, listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+      }
+      else
+      {
+        this->ReadNonUniformList<LABELLIST, listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+      }
+      break;
+    }
+
+    case vtkFoamTypes::SCALAR_TYPE:
+    {
+      if (io.IsFloat64())
+      {
+        this->ReadNonUniformList<SCALARLIST, listTraits<vtkFloatArray, double>>(io);
+      }
+      else
+      {
+        this->ReadNonUniformList<SCALARLIST, listTraits<vtkFloatArray, float>>(io);
+      }
+      break;
+    }
+
+    case vtkFoamTypes::SPH_TENSOR_TYPE:
+    {
+      if (io.IsFloat64())
+      {
+        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 1>>(io);
+      }
+      else
+      {
+        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 1>>(io);
+      }
+      break;
+    }
+
+    case vtkFoamTypes::VECTOR_TYPE:
+    {
+      if (io.IsFloat64())
+      {
+        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 3>>(io);
+      }
+      else
+      {
+        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 3>>(io);
+      }
+      break;
+    }
+
+    case vtkFoamTypes::SYMM_TENSOR_TYPE:
+    {
+      if (io.IsFloat64())
+      {
+        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 6>>(io);
+      }
+      else
+      {
+        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 6>>(io);
+      }
+      break;
+    }
+
+    case vtkFoamTypes::TENSOR_TYPE:
+    {
+      if (io.IsFloat64())
+      {
+        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 9>>(io);
+      }
+      else
+      {
+        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 9>>(io);
+      }
+      break;
+    }
+
+    default:
+    {
+      handled = false;
+      break;
+    }
+  }
+  return handled;
+}
+
 //------------------------------------------------------------------------------
 // class vtkFoamEntry
 // a class that represents an entry of a dictionary. note that an
@@ -4009,11 +4097,10 @@ public:
         if (isSubDictionary)
         {
           // the following if clause is for an exceptional expression
-          // of `LABEL{LABELorSCALAR}' without type prefix
+          // of `LABEL{numeric}' without type prefix
           // (e. g. `2{-0}' in mixedRhoE B.C. in
           // rhopSonicFoam/shockTube)
-          if (currToken.GetType() == vtkFoamToken::LABEL ||
-            currToken.GetType() == vtkFoamToken::SCALAR)
+          if (currToken.IsNumeric())
           {
             this->Token = currToken;
             io.ReadExpecting('}');
@@ -4030,7 +4117,7 @@ public:
         {
           // list of dictionaries is read as a usual dictionary
           // polyMesh/boundary, point/face/cell-Zones
-          if (currToken.GetType() == vtkFoamToken::LABEL)
+          if (currToken.IsLabel())
           {
             io.ReadExpecting('(');
             if (currToken.To<vtkTypeInt64>() > 0)
@@ -4087,8 +4174,7 @@ public:
         currToken = firstToken;
       }
 
-      if (currToken == ';' || currToken.GetType() == vtkFoamToken::STRING ||
-        currToken.GetType() == vtkFoamToken::IDENTIFIER)
+      if (currToken == ';' || currToken.IsStringType())
       {
         // general dictionary
         do
@@ -4172,9 +4258,7 @@ public:
             }
           }
           // skip empty entry only with ';'
-        } while (io.Read(currToken) &&
-          (currToken.GetType() == vtkFoamToken::STRING ||
-            currToken.GetType() == vtkFoamToken::IDENTIFIER || currToken == ';'));
+        } while (io.Read(currToken) && (currToken.IsStringType() || currToken == ';'));
 
         if (currToken.GetType() == vtkFoamToken::TOKEN_ERROR || currToken == '}' ||
           currToken == ')')
@@ -4297,6 +4381,7 @@ vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntr
       }
     }
     break;
+    case BOOLLIST:
     case LABELLIST:
     case SCALARLIST:
     case STRINGLIST:
@@ -4336,8 +4421,6 @@ vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntr
         this->DictPtr->SetStreamOption(value.GetStreamOption());
       }
       break;
-    case BOOLLIST:
-      break;
     case EMPTYLIST:
       break;
     case UNDEFINED:
@@ -4358,6 +4441,7 @@ void vtkFoamEntryValue::Clear()
   {
     switch (this->Superclass::Type)
     {
+      case BOOLLIST:
       case LABELLIST:
       case SCALARLIST:
       case VECTORLIST:
@@ -4380,7 +4464,6 @@ void vtkFoamEntryValue::Clear()
       case STRING:
       case IDENTIFIER:
       case TOKEN_ERROR:
-      case BOOLLIST:
       case EMPTYLIST:
       default:
         break;
@@ -4403,7 +4486,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
   io.Read(currToken);
 
   // initial guess of the list type
-  if (currToken.GetType() == this->Superclass::LABEL)
+  if (currToken.IsLabel())
   {
     // if the first token is of type LABEL it might be either an element of
     // a labelList or the size of a sublist so proceed to the next token
@@ -4413,7 +4496,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
     {
       throw vtkFoamError() << "Unexpected EOF";
     }
-    if (nextToken.GetType() == this->Superclass::LABEL)
+    if (nextToken.IsLabel())
     {
       if (this->IsLabel64())
       {
@@ -4431,7 +4514,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
       }
       this->Superclass::Type = LABELLIST;
     }
-    else if (nextToken.GetType() == this->Superclass::SCALAR)
+    else if (nextToken.GetType() == vtkFoamToken::SCALAR)
     {
       this->Superclass::ScalarListPtr = vtkFloatArray::New();
       this->Superclass::ScalarListPtr->InsertNextValue(currToken.To<float>());
@@ -4470,7 +4553,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
       throw vtkFoamError() << "Expected number, '(' or ')', found " << nextToken;
     }
   }
-  else if (currToken.GetType() == this->Superclass::SCALAR)
+  else if (currToken.GetType() == vtkFoamToken::SCALAR)
   {
     this->Superclass::ScalarListPtr = vtkFloatArray::New();
     this->Superclass::ScalarListPtr->InsertNextValue(currToken.To<float>());
@@ -4478,7 +4561,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
   }
   // if the first word is a string we have to read another token to determine
   // if the first word is a keyword for the following dictionary
-  else if (currToken.GetType() == this->Superclass::STRING)
+  else if (currToken.GetType() == vtkFoamToken::STRING)
   {
     vtkFoamToken nextToken;
     nextToken.SetStreamOption(io);
@@ -4486,7 +4569,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
     {
       throw vtkFoamError() << "Unexpected EOF";
     }
-    if (nextToken.GetType() == this->Superclass::STRING) // list of strings
+    if (nextToken.GetType() == vtkFoamToken::STRING) // list of strings
     {
       this->Superclass::StringListPtr = vtkStringArray::New();
       this->Superclass::StringListPtr->InsertNextValue(currToken.ToString());
@@ -4565,7 +4648,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
   {
     if (this->Superclass::Type == LABELLIST)
     {
-      if (currToken.GetType() == this->Superclass::SCALAR)
+      if (currToken.GetType() == vtkFoamToken::SCALAR)
       {
         // Encountered a scalar while reading a labelList - switch representation
         // Need intermediate pointer since LabelListPtr and ScalarListPtr are in a union
@@ -4588,7 +4671,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
         this->Superclass::ScalarListPtr = scalars;
         this->Superclass::Type = SCALARLIST;
       }
-      else if (currToken.GetType() == this->Superclass::LABEL)
+      else if (currToken.IsLabel())
       {
         assert("Label type not set!" && currToken.HasLabelType());
         if (currToken.IsLabel64())
@@ -4609,7 +4692,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
         throw vtkFoamError() << "Expected a number, found " << currToken;
       }
     }
-    else if (this->Superclass::Type == this->Superclass::SCALARLIST)
+    else if (this->Superclass::Type == vtkFoamToken::SCALARLIST)
     {
       if (currToken.IsNumeric())
       {
@@ -4631,9 +4714,9 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
         throw vtkFoamError() << "Expected a number, found " << currToken;
       }
     }
-    else if (this->Superclass::Type == this->Superclass::STRINGLIST)
+    else if (this->Superclass::Type == vtkFoamToken::STRINGLIST)
     {
-      if (currToken.GetType() == this->Superclass::STRING)
+      if (currToken.GetType() == vtkFoamToken::STRING)
       {
         this->Superclass::StringListPtr->InsertNextValue(currToken.ToString());
       }
@@ -4642,9 +4725,9 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
         throw vtkFoamError() << "Expected a string, found " << currToken;
       }
     }
-    else if (this->Superclass::Type == this->Superclass::ENTRYVALUELIST)
+    else if (this->Superclass::Type == vtkFoamToken::ENTRYVALUELIST)
     {
-      if (currToken.GetType() == this->Superclass::LABEL)
+      if (currToken.IsLabel())
       {
         // skip the number of elements to make things simple
         if (!io.Read(currToken))
@@ -4665,15 +4748,19 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
     }
   }
 
-  if (this->Superclass::Type == this->Superclass::LABELLIST)
+  if (this->Superclass::Type == vtkFoamToken::BOOLLIST)
+  {
+    this->Superclass::BoolListPtr->Squeeze();
+  }
+  else if (this->Superclass::Type == vtkFoamToken::LABELLIST)
   {
     this->Superclass::LabelListPtr->Squeeze();
   }
-  else if (this->Superclass::Type == this->Superclass::SCALARLIST)
+  else if (this->Superclass::Type == vtkFoamToken::SCALARLIST)
   {
     this->Superclass::ScalarListPtr->Squeeze();
   }
-  else if (this->Superclass::Type == this->Superclass::STRINGLIST)
+  else if (this->Superclass::Type == vtkFoamToken::STRINGLIST)
   {
     this->Superclass::StringListPtr->Squeeze();
   }
@@ -4684,7 +4771,7 @@ void vtkFoamEntryValue::ReadDictionary(vtkFoamIOobject& io, const vtkFoamToken&
 {
   this->Superclass::DictPtr = new vtkFoamDict(this->UpperEntryPtr->GetUpperDictPtr());
   this->DictPtr->SetStreamOption(io);
-  this->Superclass::Type = this->Superclass::DICTIONARY;
+  this->Superclass::Type = vtkFoamToken::DICTIONARY;
   this->Superclass::DictPtr->Read(io, true, firstKeyword);
 }
 
@@ -4702,6 +4789,8 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
     throw vtkFoamError() << "Unexpected EOF";
   }
 
+  vtkFoamTypes::dataType listDataType(vtkFoamTypes::NO_TYPE);
+
   if (currToken == '{')
   {
     this->ReadDictionary(io, vtkFoamToken());
@@ -4735,15 +4824,13 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
       this->Superclass::operator=("uniform");
       return 0;
     }
-    else if (currToken.GetType() == this->Superclass::LABEL ||
-      currToken.GetType() == this->Superclass::SCALAR ||
-      currToken.GetType() == this->Superclass::STRING)
+    else if (currToken.IsNumeric() || currToken.GetType() == vtkFoamToken::STRING)
     {
       this->Superclass::operator=(currToken);
     }
     else // unexpected punctuation token
     {
-      throw vtkFoamError() << "Expected number, string or (, found " << currToken;
+      throw vtkFoamError() << "Expected number, string or ( for uniform entry, found " << currToken;
     }
     this->IsUniformEntry = true;
   }
@@ -4751,81 +4838,25 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
   {
     if (!io.Read(currToken))
     {
-      throw vtkFoamError() << "Expected list type specifier, found EOF";
+      throw vtkFoamError() << "Expected list type specifier for nonuniform entry, found EOF";
     }
     this->IsUniformEntry = false;
-    if (currToken == "List<scalar>")
-    {
-      if (io.IsFloat64())
-      {
-        this->ReadNonuniformList<SCALARLIST, listTraits<vtkFloatArray, double>>(io);
-      }
-      else
-      {
-        this->ReadNonuniformList<SCALARLIST, listTraits<vtkFloatArray, float>>(io);
-      }
-    }
-    else if (currToken == "List<sphericalTensor>")
-    {
-      if (io.IsFloat64())
-      {
-        this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 1, false>>(io);
-      }
-      else
-      {
-        this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 1, false>>(io);
-      }
-    }
-    else if (currToken == "List<vector>")
-    {
-      if (io.IsFloat64())
-      {
-        this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 3, false>>(io);
-      }
-      else
-      {
-        this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 3, false>>(io);
-      }
-    }
-    else if (currToken == "List<symmTensor>")
-    {
-      if (io.IsFloat64())
-      {
-        this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 6, false>>(io);
-      }
-      else
-      {
-        this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 6, false>>(io);
-      }
-    }
-    else if (currToken == "List<tensor>")
+
+    listDataType = vtkFoamTypes::NO_TYPE;
+
+    if (currToken.GetType() == vtkFoamToken::STRING)
     {
-      if (io.IsFloat64())
-      {
-        this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 9, false>>(io);
-      }
-      else
-      {
-        this->ReadNonuniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 9, false>>(io);
-      }
+      // List types: "List<label>", "List<scalar>" ...
+      listDataType = vtkFoamTypes::ListToEnum(currToken.ToString());
     }
-    // List<bool> may or may not be read as List<label>,
-    // this needs checking but not many bool fields in use
-    else if (currToken == "List<label>" || currToken == "List<bool>")
+    if (vtkFoamTypes::IsGood(listDataType))
     {
-      if (io.IsLabel64())
-      {
-        this->ReadNonuniformList<LABELLIST, listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
-      }
-      else
-      {
-        this->ReadNonuniformList<LABELLIST, listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
-      }
+      this->ReadNonUniformList(io, listDataType);
     }
-    // an empty list doesn't have a list type specifier
-    else if (currToken.GetType() == this->Superclass::LABEL && currToken.To<vtkTypeInt64>() == 0)
+    else if (currToken.IsLabel() && currToken.To<vtkTypeInt64>() == 0)
     {
-      this->Superclass::Type = this->Superclass::EMPTYLIST;
+      // An empty list doesn't have a list type specifier
+      this->Superclass::Type = vtkFoamToken::EMPTYLIST;
       if (io.IsAsciiFormat())
       {
         io.ReadExpecting('(');
@@ -4842,45 +4873,14 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
       throw vtkFoamError() << "Unsupported nonuniform list type " << currToken;
     }
   }
-  // turbulentTemperatureCoupledBaffleMixed boundary condition
-  // uses lists without a uniform/nonuniform keyword
-  else if (currToken == "List<scalar>")
-  {
-    this->IsUniformEntry = false;
-    if (io.IsFloat64())
-    {
-      this->ReadNonuniformList<SCALARLIST, listTraits<vtkFloatArray, double>>(io);
-    }
-    else
-    {
-      this->ReadNonuniformList<SCALARLIST, listTraits<vtkFloatArray, float>>(io);
-    }
-  }
-  // zones have list without a uniform/nonuniform keyword
-  else if (currToken == "List<label>")
-  {
-    this->IsUniformEntry = false;
-    if (io.IsLabel64())
-    {
-      this->ReadNonuniformList<LABELLIST, listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
-    }
-    else
-    {
-      this->ReadNonuniformList<LABELLIST, listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
-    }
-  }
-  else if (currToken == "List<bool>")
+  else if (currToken.GetType() == vtkFoamToken::STRING &&
+    (listDataType = vtkFoamTypes::ListToEnum(currToken.ToString())) != vtkFoamTypes::NO_TYPE)
   {
-    // List<bool> is read as a list of bytes (binary) or ints (ascii)
-    // - primary location is the flipMap entry in faceZones
+    // Lists without a uniform/nonuniform keyword - eg, zones
     this->IsUniformEntry = false;
-    this->ReadNonuniformList<BOOLLIST, listTraits<vtkTypeInt8Array, vtkTypeInt8>>(io);
+    this->ReadNonUniformList(io, listDataType);
   }
-  else if (currToken.GetType() == this->Superclass::PUNCTUATION ||
-    currToken.GetType() == this->Superclass::LABEL ||
-    currToken.GetType() == this->Superclass::SCALAR ||
-    currToken.GetType() == this->Superclass::STRING ||
-    currToken.GetType() == this->Superclass::IDENTIFIER)
+  else if (currToken.IsPunctuation() || currToken.IsNumeric() || currToken.IsStringType())
   {
     this->Superclass::operator=(currToken);
   }
@@ -4903,7 +4903,7 @@ void vtkFoamEntry::Read(vtkFoamIOobject& io)
     {
       vtkFoamEntryValue& secondLastValue =
         *this->Superclass::operator[](this->Superclass::size() - 2);
-      if (secondLastValue.GetType() == vtkFoamToken::LABEL)
+      if (secondLastValue.IsLabel())
       {
         vtkFoamEntryValue& lastValue = *this->Superclass::back();
 
@@ -5262,7 +5262,7 @@ void vtkOpenFOAMReaderPrivate::AddFieldName(
   {
     // Lagrangian (point) fields: labelField, scalarField, vectorField, ...
 
-    const auto fieldDataType(vtkFoamTypes::ToEnum(fieldType));
+    const auto fieldDataType(vtkFoamTypes::FieldToEnum(fieldType));
     if (fieldDataType != vtkFoamTypes::NO_TYPE)
     {
       // NB: Cloud has labelField too
@@ -5305,7 +5305,7 @@ void vtkOpenFOAMReaderPrivate::AddFieldName(
 
   if (target != nullptr)
   {
-    const auto fieldDataType(vtkFoamTypes::ToEnum(fieldType.substr(prefix, len)));
+    const auto fieldDataType(vtkFoamTypes::FieldToEnum(fieldType.substr(prefix, len)));
     if (vtkFoamTypes::IsScalar(fieldDataType) || vtkFoamTypes::IsVectorSpace(fieldDataType))
     {
       target->InsertNextValue(fieldName);
@@ -5550,9 +5550,8 @@ bool vtkFoamBoundaries::update(const vtkFoamDict& dict)
       const auto* ownptr = patchDict.Lookup("myProcNo");
       const auto* neiptr = patchDict.Lookup("neighbProcNo");
 
-      if (ownptr != nullptr && neiptr != nullptr &&
-        (ownptr->FirstValue().GetType() == vtkFoamToken::LABEL) &&
-        (neiptr->FirstValue().GetType() == vtkFoamToken::LABEL))
+      if (ownptr != nullptr && neiptr != nullptr && // Safety
+        ownptr->FirstValue().IsLabel() && neiptr->FirstValue().IsLabel())
       {
         const vtkTypeInt64 own = ownptr->FirstValue().ToInt();
         const vtkTypeInt64 nei = neiptr->FirstValue().ToInt();
@@ -6257,13 +6256,13 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile()
 
     if (io.IsFloat64())
     {
-      dict.ReadNonuniformList<vtkFoamToken::VECTORLIST,
-        vtkFoamEntryValue::vectorListTraits<vtkFloatArray, double, 3, false>>(io);
+      dict.ReadNonUniformList<vtkFoamToken::VECTORLIST,
+        vtkFoamEntryValue::vectorListTraits<vtkFloatArray, double, 3>>(io);
     }
     else
     {
-      dict.ReadNonuniformList<vtkFoamToken::VECTORLIST,
-        vtkFoamEntryValue::vectorListTraits<vtkFloatArray, float, 3, false>>(io);
+      dict.ReadNonUniformList<vtkFoamToken::VECTORLIST,
+        vtkFoamEntryValue::vectorListTraits<vtkFloatArray, float, 3>>(io);
     }
 
     // Capture content as smart pointer
@@ -6380,12 +6379,12 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
     {
       if (use64BitLabels)
       {
-        ownerDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
+        ownerDict.ReadNonUniformList<vtkFoamToken::LABELLIST,
           vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
       }
       else
       {
-        ownerDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
+        ownerDict.ReadNonUniformList<vtkFoamToken::LABELLIST,
           vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
       }
     }
@@ -6425,12 +6424,12 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
     {
       if (use64BitLabels)
       {
-        neighDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
+        neighDict.ReadNonUniformList<vtkFoamToken::LABELLIST,
           vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
       }
       else
       {
-        neighDict.ReadNonuniformList<vtkFoamEntryValue::LABELLIST,
+        neighDict.ReadNonUniformList<vtkFoamToken::LABELLIST,
           vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
       }
     }
@@ -8236,8 +8235,7 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry&
   vtkSmartPointer<vtkFloatArray> data;
   if (entry.FirstValue().IsUniform())
   {
-    if (entry.FirstValue().GetType() == vtkFoamToken::SCALAR ||
-      entry.FirstValue().GetType() == vtkFoamToken::LABEL)
+    if (entry.FirstValue().IsNumeric())
     {
       const float num = entry.ToFloat();
       data = vtkSmartPointer<vtkFloatArray>::New();
@@ -8247,7 +8245,7 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry&
     else
     {
       float tupleBuffer[9], *tuple;
-      int nComponents;
+      int nComponents = -1;
       // have to determine the type of vector
       if (entry.FirstValue().GetType() == vtkFoamToken::LABELLIST)
       {
@@ -8523,7 +8521,7 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
   }
 
   // Eg, from "volScalarField" or "volScalarField::Internal" -> SCALAR_TYPE
-  const auto fieldDataType(vtkFoamTypes::ToEnum(io.GetClassName(), 3));
+  const auto fieldDataType(vtkFoamTypes::FieldToEnum(io.GetClassName(), 3));
 
   // -------------------------
   // Handle dictionary lookups first
@@ -9023,7 +9021,7 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
   }
 
   // Eg, from "pointScalarField" -> SCALAR_TYPE
-  const auto fieldDataType(vtkFoamTypes::ToEnum(io.GetClassName(), 5));
+  const auto fieldDataType(vtkFoamTypes::FieldToEnum(io.GetClassName(), 5));
 
   // -------------------------
   // Handle dictionary lookups first
@@ -9217,12 +9215,12 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
       {
         if (io.IsFloat64())
         {
-          dict.ReadNonuniformList<vtkFoamToken::VECTORLIST,
+          dict.ReadNonUniformList<vtkFoamToken::VECTORLIST,
             vtkFoamEntryValue::vectorListTraits<vtkFloatArray, double, 3, true>>(io);
         }
         else
         {
-          dict.ReadNonuniformList<vtkFoamToken::VECTORLIST,
+          dict.ReadNonUniformList<vtkFoamToken::VECTORLIST,
             vtkFoamEntryValue::vectorListTraits<vtkFloatArray, float, 3, true>>(io);
         }
 
@@ -9395,7 +9393,7 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
     // Some OpenFOAM versions write an empty list as zero label only (in binary)
     if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
-      (labelsEntry.GetType() == vtkFoamToken::LABEL && labelsEntry.ToInt() == 0))
+      (labelsEntry.IsLabel() && labelsEntry.ToInt() == 0))
     {
       // For empty list - store empty mesh (for proper block ordering)
       ::SetBlock(zoneMesh, zonei, zm, zoneName);
@@ -9531,7 +9529,7 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
 
     // Some OpenFOAM versions write an empty list as zero label only (in binary)
     if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
-      (labelsEntry.GetType() == vtkFoamToken::LABEL && labelsEntry.ToInt() == 0))
+      (labelsEntry.IsLabel() && labelsEntry.ToInt() == 0))
     {
       // For empty list - store empty mesh (for proper block ordering)
       ::SetBlock(zoneMesh, zonei, zm, zoneName);
@@ -9681,7 +9679,7 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
     // Some OpenFOAM versions write an empty list as zero label only (in binary)
     if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
-      (labelsEntry.GetType() == vtkFoamToken::LABEL && labelsEntry.ToInt() == 0))
+      (labelsEntry.IsLabel() && labelsEntry.ToInt() == 0))
     {
       // For empty list - store empty mesh (for proper block ordering)
       ::SetBlock(zoneMesh, zonei, zm, zoneName);
-- 
GitLab


From 9d9f1df6cd885b3c43ab21d4ebf61e2b661a6c0f Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Wed, 3 Feb 2021 11:48:02 +0100
Subject: [PATCH 12/36] openfoam: remap symmTensor on input - simplifies later
 handling

- avoid redundant size parameter when reading lists.
  The number of tuples for the list already defined prior to calling.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 202 ++++++++++++++++--------------
 1 file changed, 105 insertions(+), 97 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 74d93aaacfc..4a616e2a941 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -246,6 +246,36 @@ void AppendLabelValue(vtkDataArray* array, vtkTypeInt64 val, bool use64BitLabels
   }
 }
 
+// Tuple remapping for symmTensor ordering
+// OpenFOAM [XX XY XZ YY YZ ZZ]
+// VTK uses [XX YY ZZ XY YZ XZ]
+template <typename T>
+void remapFoamSymmTensor(T data[])
+{
+  std::swap(data[1], data[3]); // swap XY <-> YY
+  std::swap(data[2], data[5]); // swap XZ <-> ZZ
+}
+
+// Generic tuple remapping is a no-op
+template <bool symmTensor, typename T>
+void remapFoamTuple(T[])
+{
+}
+
+// Remapping for symmTensor (float)
+template <>
+void remapFoamTuple<true>(float data[])
+{
+  ::remapFoamSymmTensor(data);
+}
+
+// Remapping for symmTensor (double)
+template <>
+void remapFoamTuple<true>(double data[])
+{
+  ::remapFoamSymmTensor(data);
+}
+
 } // End anonymous namespace
 
 //------------------------------------------------------------------------------
@@ -3173,48 +3203,56 @@ public:
 
   // Helper Classes
 
-  // reads primitive int/float lists
+  // Reads primitive int/float lists
   template <typename listT, typename primitiveT>
   class listTraits
   {
     listT* Ptr;
 
   public:
+    using ValueType = typename listT::ValueType;
+
     listTraits()
       : Ptr(listT::New())
     {
     }
-    listT* GetPtr() { return this->Ptr; }
 
-    void ReadUniformValues(vtkFoamIOobject& io, const vtkIdType size)
+    // Get the contained pointer
+    listT* GetPointer() const noexcept { return this->Ptr; }
+
+    // Deference pointer for operation
+    listT* operator->() const noexcept { return this->Ptr; }
+
+    void ReadUniformValues(vtkFoamIOobject& io)
     {
       primitiveT value = vtkFoamReadValue<primitiveT>::ReadValue(io);
       this->Ptr->FillValue(value);
     }
 
-    void ReadAsciiList(vtkFoamIOobject& io, const vtkIdType size)
+    void ReadAsciiList(vtkFoamIOobject& io)
     {
-      for (vtkIdType i = 0; i < size; i++)
+      const vtkIdType nTuples = this->Ptr->GetNumberOfTuples();
+      for (vtkIdType i = 0; i < nTuples; ++i)
       {
         this->Ptr->SetValue(i, vtkFoamReadValue<primitiveT>::ReadValue(io));
       }
     }
 
-    void ReadBinaryList(vtkFoamIOobject& io, const size_t size)
+    void ReadBinaryList(vtkFoamIOobject& io)
     {
-      const size_t nbytes = (size * sizeof(primitiveT));
+      // nComponents == 1
+      const vtkIdType nTuples = this->Ptr->GetNumberOfTuples();
+      const size_t nbytes = (nTuples * sizeof(primitiveT));
 
-      typedef typename listT::ValueType ListValueType;
-      if (typeid(ListValueType) == typeid(primitiveT))
+      if (typeid(ValueType) == typeid(primitiveT))
       {
         io.Read(reinterpret_cast<unsigned char*>(this->Ptr->GetPointer(0)), nbytes);
       }
       else
       {
-        vtkDataArray* fileData =
-          vtkDataArray::CreateDataArray(vtkTypeTraits<primitiveT>::VTKTypeID());
-        fileData->SetNumberOfComponents(this->Ptr->GetNumberOfComponents());
-        fileData->SetNumberOfTuples(this->Ptr->GetNumberOfTuples());
+        auto* fileData = vtkDataArray::CreateDataArray(vtkTypeTraits<primitiveT>::VTKTypeID());
+        // nComponents == 1
+        fileData->SetNumberOfTuples(nTuples);
         io.Read(reinterpret_cast<unsigned char*>(fileData->GetVoidPointer(0)), nbytes);
         this->Ptr->DeepCopy(fileData);
         fileData->Delete();
@@ -3231,8 +3269,8 @@ public:
     }
   };
 
-  // reads rank 1 lists of types vector, sphericalTensor, symmTensor
-  // and tensor. if isPositions is true it reads Cloud type of data as
+  // Reads rank 1 lists of types vector, sphericalTensor, symmTensor and tensor.
+  // If isPositions is true it reads Cloud type of data as
   // particle positions. cf. (the positions format)
   // src/lagrangian/basic/particle/particleIO.C - writePosition()
   template <typename listT, typename primitiveT, int nComponents, bool isPositions = false>
@@ -3241,57 +3279,67 @@ public:
     listT* Ptr;
 
   public:
+    using ValueType = typename listT::ValueType;
+
     vectorListTraits()
       : Ptr(listT::New())
     {
       this->Ptr->SetNumberOfComponents(nComponents);
     }
-    listT* GetPtr() { return this->Ptr; }
 
-    void ReadUniformValues(vtkFoamIOobject& io, const vtkIdType size)
+    // Get the contained pointer
+    listT* GetPointer() const noexcept { return this->Ptr; }
+
+    // Deference pointer for operation
+    listT* operator->() const noexcept { return this->Ptr; }
+
+    void ReadUniformValues(vtkFoamIOobject& io)
     {
+      const vtkIdType nTuples = this->Ptr->GetNumberOfTuples();
+
       io.ReadExpecting('(');
-      primitiveT vectorValue[nComponents];
-      for (int j = 0; j < nComponents; j++)
+      primitiveT tuple[nComponents];
+      for (int cmpt = 0; cmpt < nComponents; ++cmpt)
       {
-        vectorValue[j] = vtkFoamReadValue<primitiveT>::ReadValue(io);
-      }
-      for (vtkIdType i = 0; i < size; i++)
-      {
-        this->Ptr->SetTuple(i, vectorValue);
+        tuple[cmpt] = vtkFoamReadValue<primitiveT>::ReadValue(io);
       }
+      ::remapFoamTuple<nComponents == 6>(tuple); // For symmTensor
       io.ReadExpecting(')');
       if (isPositions)
       {
-        // skip label celli
-        vtkFoamReadValue<int>::ReadValue(io);
+        vtkFoamReadValue<vtkTypeInt64>::ReadValue(io); // Skip label celli
+      }
+
+      for (vtkIdType i = 0; i < nTuples; ++i)
+      {
+        this->Ptr->SetTuple(i, tuple);
       }
     }
 
-    void ReadAsciiList(vtkFoamIOobject& io, const vtkIdType size)
+    void ReadAsciiList(vtkFoamIOobject& io)
     {
-      typedef typename listT::ValueType ListValueType;
-      for (vtkIdType i = 0; i < size; i++)
+      const vtkIdType nTuples = this->Ptr->GetNumberOfTuples();
+
+      for (vtkIdType i = 0; i < nTuples; ++i)
       {
         io.ReadExpecting('(');
-        ListValueType* vectorTupleI = this->Ptr->GetPointer(nComponents * i);
-        for (int j = 0; j < nComponents; j++)
+        ValueType* tuple = this->Ptr->GetPointer(nComponents * i);
+        for (int cmpt = 0; cmpt < nComponents; ++cmpt)
         {
-          vectorTupleI[j] = static_cast<ListValueType>(vtkFoamReadValue<primitiveT>::ReadValue(io));
+          tuple[cmpt] = static_cast<ValueType>(vtkFoamReadValue<primitiveT>::ReadValue(io));
         }
+        ::remapFoamTuple<nComponents == 6>(tuple); // For symmTensor
         io.ReadExpecting(')');
         if (isPositions)
         {
-          // skip label celli
-          vtkFoamReadValue<vtkTypeInt64>::ReadValue(io);
+          vtkFoamReadValue<vtkTypeInt64>::ReadValue(io); // Skip label celli
         }
       }
     }
 
-    void ReadBinaryList(vtkFoamIOobject& io, const size_t size)
+    void ReadBinaryList(vtkFoamIOobject& io)
     {
-      // Should be OK, since size came from OpenFOAM also used (signed integer)
-      const vtkTypeInt64 listLen = static_cast<vtkTypeInt64>(size);
+      const vtkTypeInt64 nTuples = this->Ptr->GetNumberOfTuples();
 
       if (isPositions) // lagrangian/positions (class Cloud)
       {
@@ -3308,7 +3356,7 @@ public:
         bufferContainer.resize(tupleLength);
         primitiveT* buffer = reinterpret_cast<primitiveT*>(bufferContainer.data());
 
-        for (vtkTypeInt64 i = 0; i < listLen; ++i)
+        for (vtkTypeInt64 i = 0; i < nTuples; ++i)
         {
           io.ReadExpecting('(');
           io.Read(reinterpret_cast<unsigned char*>(buffer), tupleLength);
@@ -3318,25 +3366,24 @@ public:
       }
       else
       {
-        typedef typename listT::ValueType ListValueType;
-
         // Compiler hint for better unrolling:
         VTK_ASSUME(this->Ptr->GetNumberOfComponents() == nComponents);
 
         const unsigned tupleLength = (sizeof(primitiveT) * nComponents);
-        primitiveT buffer[nComponents];
+        primitiveT tuple[nComponents];
 
-        for (vtkTypeInt64 i = 0; i < listLen; ++i)
+        for (vtkTypeInt64 i = 0; i < nTuples; ++i)
         {
-          const int readLength = io.Read(reinterpret_cast<unsigned char*>(buffer), tupleLength);
+          const int readLength = io.Read(reinterpret_cast<unsigned char*>(tuple), tupleLength);
           if (readLength != tupleLength)
           {
-            throw vtkFoamError() << "Failed to read tuple " << i << '/' << listLen << ": Expected "
+            throw vtkFoamError() << "Failed to read tuple " << i << '/' << nTuples << ": Expected "
                                  << tupleLength << " bytes, got " << readLength << " bytes.";
           }
-          for (int c = 0; c < nComponents; ++c)
+          ::remapFoamTuple<nComponents == 6>(tuple); // For symmTensor
+          for (int cmpt = 0; cmpt < nComponents; ++cmpt)
           {
-            this->Ptr->SetTypedComponent(i, c, static_cast<ListValueType>(buffer[c]));
+            this->Ptr->SetTypedComponent(i, cmpt, static_cast<ValueType>(tuple[cmpt]));
           }
         }
       }
@@ -3348,13 +3395,14 @@ public:
       {
         throw vtkFoamError() << "Expected '(', found " << currToken;
       }
-      primitiveT v[nComponents];
-      for (int j = 0; j < nComponents; j++)
+      primitiveT tuple[nComponents];
+      for (int cmpt = 0; cmpt < nComponents; ++cmpt)
       {
-        v[j] = vtkFoamReadValue<primitiveT>::ReadValue(io);
+        tuple[cmpt] = vtkFoamReadValue<primitiveT>::ReadValue(io);
       }
-      this->Ptr->InsertNextTuple(v);
+      ::remapFoamTuple<nComponents == 6>(tuple); // For symmTensor
       io.ReadExpecting(')');
+      this->Ptr->InsertNextTuple(tuple);
     }
   };
 
@@ -3728,7 +3776,7 @@ void vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io)
   }
   traitsT list;
   this->Superclass::Type = listType;
-  this->Superclass::VtkObjectPtr = list.GetPtr();
+  this->Superclass::VtkObjectPtr = list.GetPointer();
   if (currToken.Is<vtkTypeInt64>())
   {
     const vtkTypeInt64 size = currToken.To<vtkTypeInt64>();
@@ -3736,7 +3784,7 @@ void vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io)
     {
       throw vtkFoamError() << "List size must not be negative: size = " << size;
     }
-    list.GetPtr()->SetNumberOfTuples(size);
+    list->SetNumberOfTuples(size);
     if (io.IsAsciiFormat())
     {
       if (!io.Read(currToken))
@@ -3747,7 +3795,7 @@ void vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io)
       // e. g. simpleFoam/pitzDaily3Blocks/constant/polyMesh/faceZones
       if (currToken == '{')
       {
-        list.ReadUniformValues(io, size);
+        list.ReadUniformValues(io);
         io.ReadExpecting('}');
         return;
       }
@@ -3755,7 +3803,7 @@ void vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io)
       {
         throw vtkFoamError() << "Expected '(', found " << currToken;
       }
-      list.ReadAsciiList(io, size);
+      list.ReadAsciiList(io);
       io.ReadExpecting(')');
     }
     else
@@ -3764,7 +3812,7 @@ void vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io)
       {
         // Non-empty (binary) list - only read parentheses only when size > 0
         io.ReadExpecting('(');
-        list.ReadBinaryList(io, size);
+        list.ReadBinaryList(io);
         io.ReadExpecting(')');
       }
     }
@@ -3775,7 +3823,7 @@ void vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io)
     {
       list.ReadValue(io, currToken);
     }
-    list.GetPtr()->Squeeze();
+    list->Squeeze();
   }
   else
   {
@@ -4364,26 +4412,10 @@ vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntr
 {
   switch (this->Superclass::Type)
   {
-    case VECTORLIST:
-    {
-      auto* array = vtkFloatArray::SafeDownCast(value.ToVTKObject());
-      if (array->GetNumberOfComponents() == 6)
-      {
-        // DeepCopy for symmTensor fields to avoid duplicated manipulation
-        auto* arrayCopy = vtkFloatArray::New();
-        arrayCopy->DeepCopy(array);
-        this->Superclass::VtkObjectPtr = arrayCopy;
-      }
-      else
-      {
-        this->Superclass::VtkObjectPtr = value.ToVTKObject();
-        this->Superclass::VtkObjectPtr->Register(nullptr);
-      }
-    }
-    break;
     case BOOLLIST:
     case LABELLIST:
     case SCALARLIST:
+    case VECTORLIST:
     case STRINGLIST:
       this->Superclass::VtkObjectPtr = value.ToVTKObject();
       this->Superclass::VtkObjectPtr->Register(nullptr);
@@ -8275,15 +8307,6 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry&
         data = vtkSmartPointer<vtkFloatArray>::New();
         data->SetNumberOfComponents(nComponents);
         data->SetNumberOfTuples(nElements);
-        if (nComponents == 6)
-        {
-          // Remap symmTensor tuple
-          // OpenFOAM = (XX, XY, XZ, YY, YZ, ZZ)
-          // VTK uses = (XX, YY, ZZ, XY, YZ, XZ)
-
-          std::swap(tuple[1], tuple[3]); // swap XY <-> YY
-          std::swap(tuple[2], tuple[5]); // swap XZ <-> ZZ
-        }
         for (vtkIdType i = 0; i < nElements; i++)
         {
           data->SetTuple(i, tuple);
@@ -8315,21 +8338,6 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry&
 
       // Capture content as smart pointer
       data.TakeReference(entry.ReleasePtr<vtkFloatArray>());
-      const int nComponents = data->GetNumberOfComponents();
-      if (nComponents == 6)
-      {
-        for (vtkIdType tuplei = 0; tuplei < nTuples; ++tuplei)
-        {
-          float* tuple = data->GetPointer(nComponents * tuplei);
-
-          // Remap symmTensor tuple
-          // OpenFOAM = (XX, XY, XZ, YY, YZ, ZZ)
-          // VTK uses = (XX, YY, ZZ, XY, YZ, XZ)
-
-          std::swap(tuple[1], tuple[3]); // swap XY <-> YY
-          std::swap(tuple[2], tuple[5]); // swap XZ <-> ZZ
-        }
-      }
     }
     else if (entry.FirstValue().GetType() == vtkFoamToken::EMPTYLIST && nElements <= 0)
     {
-- 
GitLab


From 8163e5c797fa0e701da0ca35b6a944385db2fccd Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Wed, 3 Feb 2021 15:36:29 +0100
Subject: [PATCH 13/36] openfoam: avoid lagrangian and region name ambiguity

- now prefix all non-default regions as "/regionName/...".
  The default region has now prefix. This eliminates any
  possible ambiguity if we happen to have slightly odd
  region names like "patch", "lagrangian", "internalMesh", ...

- drop old OpenFOAM 1.3 cloud naming.
  These were simply dumped into the time directory without any region
  qualifications. Defunct since about 2007.

- additional code comments explaining some of the structures
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 253 +++++++++++++++++++-----------
 1 file changed, 165 insertions(+), 88 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 4a616e2a941..26b23244841 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -46,6 +46,65 @@
 // https://discourse.paraview.org/ and/or KitWare
 //
 // ---------------------------------------------------------------------------
+// OpenFOAM mesh files (serial), located under constant/polyMesh/
+//
+// https://www.openfoam.com/documentation/user-guide/mesh-description.php
+//
+// - points (type: vectorField)
+//   * x,y,z values
+//
+// - faces (type: faceList or faceCompactList)
+//   * a list of list of nodes.
+//     Either stored as such, or as offsets and content
+//
+// - owner (type: labelList)
+//   * the 'owner' cell for each face.
+//
+// - neighbour (type: labelList)
+//   * for 'neighbour' cell for each internal face.
+//
+// - boundary (type: polyBoundaryMesh)
+//   * list of patches with startFace/nFaces for external boundary regions
+//
+// The owner cell always has a lower number than neighbour.
+// The face points outwards from owner to neighbour.
+//
+// To construct the internal (volume) mesh
+// - require points, faces, owner/neighbour.
+//   Construct cells from owner/neighbour + faces.
+//
+// To construct the boundary mesh
+// - require points, faces.
+//   The owners from the boundary faces are size (owner_list - neighbour_list).
+//
+// To construct cell zones, cell sets
+// - similar requirements as internal mesh
+//
+// To construct face zones, face sets
+// - require points, faces, owners
+//
+// To construct point zones, point sets
+// - require points only
+//
+// ---------------------------------------------------------------------------
+// Patch/mesh selection naming
+// single region:
+// - internalMesh
+// - group/...
+// - patch/...
+// - lagrangian/...
+//
+// multi-region:
+// - /regionName/internalMesh
+// - /regionName/group/...
+// - /regionName/patch/...
+// - /regionName/lagrangian/...
+//
+// Prefixed with "/regionName/" to provide unambiguous names. For example,
+// - "lagrangian/..."  (lagrangian on default region)
+// - "/lagrangian/..." (mesh region called 'lagrangian' - silly, but accept)
+//
+// ---------------------------------------------------------------------------
 
 // Hide VTK_DEPRECATED_IN_9_0_0() warnings for this class.
 #define VTK_DEPRECATION_LEVEL 0
@@ -989,14 +1048,44 @@ private:
   void ClearZoneMeshes();
   void ClearMeshes();
 
+  // The subdirectory for a region. Eg, "/solid". Empty for default region.
   std::string RegionPath() const
   {
-    return (this->RegionName.empty() ? "" : "/") + this->RegionName;
+    if (this->RegionName.empty())
+    {
+      return "";
+    }
+    return ("/" + this->RegionName);
   }
+
+  // Prefix display qualifier for a region. Eg, "/solid/". Empty for default region.
   std::string RegionPrefix() const
   {
-    return this->RegionName + (this->RegionName.empty() ? "" : "/");
+    if (this->RegionName.empty())
+    {
+      return "";
+    }
+    return ("/" + this->RegionName + "/");
+  }
+
+  // Test if display (selection) name matches the current region.
+  // See RegionPrefix() comments
+  bool IsDisplayRegion(const std::string& displayName) const
+  {
+    if (this->RegionName.empty())
+    {
+      return (displayName[0] != '/');
+    }
+    else if (displayName[0] != '/')
+    {
+      return false;
+    }
+    // Match "/regionName/..."
+    const auto slash1 = displayName.find('/', 1);
+    return (slash1 != std::string::npos) &&
+      (displayName.compare(1, slash1 - 1, this->RegionName) == 0);
   }
+
   std::string TimePath(int timeIndex) const
   {
     return this->CasePath + this->TimeNames->GetValue(timeIndex);
@@ -5393,71 +5482,53 @@ void vtkOpenFOAMReaderPrivate::GetFieldNames(const std::string& tempPath, bool i
       }
     }
 
+    // Note: for isLagrangian, could reject "positions" and "coordinates" instead of opening files
+
     vtkFoamIOobject io(this->CasePath, this->Parent);
     if (io.Open(tempPath + "/" + fieldFile)) // file exists and readable
     {
       this->AddFieldName(fieldFile, io.GetClassName(), isLagrangian);
-      io.Close();
     }
   }
   // delay Squeeze of inserted objects until SortFieldFiles()
 }
 
 //------------------------------------------------------------------------------
-// locate laglangian clouds
+// Locate lagrangian clouds
 void vtkOpenFOAMReaderPrivate::LocateLagrangianClouds(const std::string& timePath)
 {
-  vtkNew<vtkDirectory> directory;
+  const std::string lagrangianDir(timePath + this->RegionPath() + "/lagrangian");
 
-  if (directory->Open((timePath + this->RegionPath() + "/lagrangian").c_str()))
+  vtkNew<vtkDirectory> directory;
+  if (directory->Open(lagrangianDir.c_str()))
   {
-    // search for sub-clouds (OF 1.5 format)
+    // Search for clouds (OF 1.5 and later format)
     const vtkIdType nFiles = directory->GetNumberOfFiles();
-    bool isSubCloud = false;
-    for (vtkIdType fileI = 0; fileI < nFiles; fileI++)
-    {
-      const std::string fileNameI(directory->GetFile(fileI));
-      if (fileNameI != "." && fileNameI != ".." && directory->FileIsDirectory(fileNameI.c_str()))
-      {
-        vtkFoamIOobject io(this->CasePath, this->Parent);
-        const std::string subCloudName(this->RegionPrefix() + "lagrangian/" + fileNameI);
-        const std::string subCloudFullPath(timePath + "/" + subCloudName);
-        // lagrangian positions. there are many concrete class names
-        // e. g. Cloud<parcel>, basicKinematicCloud etc.
-        if (io.OpenOrGzip(subCloudFullPath + "/positions") && io.GetObjectName() == "positions" &&
-          io.GetClassName().find("Cloud") != std::string::npos)
-        {
-          isSubCloud = true;
-          // a lagrangianPath has to be in a bit different format from
-          // subCloudName to make the "lagrangian" reserved path
-          // component and a mesh region with the same name
-          // distinguishable later
-          const std::string subCloudPath(this->RegionName + "/lagrangian/" + fileNameI);
-          if (this->Parent->LagrangianPaths->LookupValue(subCloudPath) == -1)
-          {
-            this->Parent->LagrangianPaths->InsertNextValue(subCloudPath);
-          }
-          this->GetFieldNames(subCloudFullPath, true);
-          this->Parent->PatchDataArraySelection->AddArray(subCloudName.c_str());
-        }
-      }
-    }
-    // if there's no sub-cloud then OF < 1.5 format
-    if (!isSubCloud)
+
+    for (vtkIdType filei = 0; filei < nFiles; ++filei)
     {
+      const std::string cloudName(directory->GetFile(filei));
+      if (cloudName == "." || cloudName == ".." || !directory->FileIsDirectory(cloudName.c_str()))
+      {
+        continue;
+      }
+
+      const std::string cloudPath(lagrangianDir + "/" + cloudName);
+      const std::string displayName(this->RegionPrefix() + "lagrangian/" + cloudName);
+
+      // lagrangian positions. there are many concrete class names
+      // e. g. Cloud<parcel>, basicKinematicCloud etc.
+
       vtkFoamIOobject io(this->CasePath, this->Parent);
-      const std::string cloudName(this->RegionPrefix() + "lagrangian");
-      const std::string cloudFullPath(timePath + "/" + cloudName);
-      if (io.OpenOrGzip(cloudFullPath + "/positions") && io.GetObjectName() == "positions" &&
+      if (io.OpenOrGzip(cloudPath + "/positions") && io.GetObjectName() == "positions" &&
         io.GetClassName().find("Cloud") != std::string::npos)
       {
-        const std::string cloudPath(this->RegionName + "/lagrangian");
-        if (this->Parent->LagrangianPaths->LookupValue(cloudPath) == -1)
+        if (this->Parent->LagrangianPaths->LookupValue(displayName) == -1)
         {
-          this->Parent->LagrangianPaths->InsertNextValue(cloudPath);
+          this->Parent->LagrangianPaths->InsertNextValue(displayName);
         }
-        this->GetFieldNames(cloudFullPath, true);
-        this->Parent->PatchDataArraySelection->AddArray(cloudName.c_str());
+        this->GetFieldNames(cloudPath, true);
+        this->Parent->PatchDataArraySelection->AddArray(displayName.c_str());
       }
     }
     this->Parent->LagrangianPaths->Squeeze();
@@ -9175,43 +9246,48 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
 //------------------------------------------------------------------------------
 vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
 {
+  // Can have several clouds coming from different regions.
+  // Displayed in selection panel like this:
+  // - lagrangian/someCloud
+  // - /regionName/lagrangian/otherCloud
+  //
+  // Pick out active ones with matching region
+
   auto* lagrangianMesh = vtkMultiBlockDataSet::New();
 
-  for (int cloudI = 0; cloudI < this->Parent->LagrangianPaths->GetNumberOfTuples(); cloudI++)
+  const vtkIdType nClouds = this->Parent->LagrangianPaths->GetNumberOfTuples();
+
+  for (vtkIdType cloudi = 0; cloudi < nClouds; ++cloudi)
   {
-    const std::string& pathI = this->Parent->LagrangianPaths->GetValue(cloudI);
+    const std::string& displayName = this->Parent->LagrangianPaths->GetValue(cloudi);
 
-    // still can't distinguish on patch selection panel, but can
-    // distinguish the "lagrangian" reserved path component and a mesh
-    // region with the same name
-    std::string subCloudName;
-    if (pathI[0] == '/')
-    {
-      subCloudName = pathI.substr(1, std::string::npos);
-    }
-    else
-    {
-      subCloudName = pathI;
-    }
-    if (this->RegionName != pathI.substr(0, pathI.find('/')) ||
-      !this->Parent->GetPatchArrayStatus(subCloudName.c_str()))
+    if (!this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()) ||
+      !this->Parent->GetPatchArrayStatus(displayName.c_str()) ||
+      !this->IsDisplayRegion(displayName))
     {
       continue;
     }
 
-    const std::string cloudPath(this->CurrentTimePath() + "/" + subCloudName + "/");
-    const std::string positionsPath(cloudPath + "positions");
+    // Equivalent to CurrentTimeRegionPath() + "lagrangian/{cloudName}"
+    std::string cloudPath(this->CurrentTimePath());
+    if (displayName[0] != '/')
+    {
+      cloudPath += '/';
+    }
+    cloudPath += displayName;
 
     // create an empty mesh to keep node/leaf structure of the
     // multi-block consistent even if mesh doesn't exist
-    vtkNew<vtkPolyData> meshI;
+    vtkNew<vtkPolyData> cloudMesh;
 
-    // Extract the cloud name
-    ::AppendBlock(lagrangianMesh, meshI, pathI.substr(pathI.rfind('/') + 1));
+    // The cloud name is the final component of the displayName
+    ::AppendBlock(lagrangianMesh, cloudMesh, displayName.substr(displayName.rfind('/') + 1));
 
     // Get the parcel positions as vtkPoints
     vtkNew<vtkPoints> points;
     {
+      const std::string positionsPath(cloudPath + "/positions");
+
       vtkFoamIOobject io(this->CasePath, this->Parent);
       if (!io.OpenOrGzip(positionsPath))
       {
@@ -9248,12 +9324,12 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
     const vtkIdType nParticles = points->GetNumberOfPoints();
 
     // Create lagrangian mesh
-    meshI->AllocateEstimate(nParticles, 1);
+    cloudMesh->AllocateEstimate(nParticles, 1);
     for (vtkIdType i = 0; i < nParticles; i++)
     {
-      meshI->InsertNextCell(VTK_VERTEX, 1, &i);
+      cloudMesh->InsertNextCell(VTK_VERTEX, 1, &i);
     }
-    meshI->SetPoints(points);
+    cloudMesh->SetPoints(points);
 
     if (!nParticles)
     {
@@ -9261,20 +9337,21 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
     }
 
     // Read lagrangian fields
-    for (int fieldI = 0; fieldI < this->LagrangianFieldFiles->GetNumberOfValues(); fieldI++)
+    const vtkIdType nFields = this->LagrangianFieldFiles->GetNumberOfValues();
+    for (vtkIdType fieldi = 0; fieldi < nFields; ++fieldi)
     {
-      const std::string varPath(cloudPath + this->LagrangianFieldFiles->GetValue(fieldI));
+      const std::string varPath(cloudPath + "/" + this->LagrangianFieldFiles->GetValue(fieldi));
 
       vtkFoamIOobject io(this->CasePath, this->Parent);
-      if (!io.Open(varPath))
+      if (!io.OpenOrGzip(varPath))
       {
         continue; // Could be empty or missing for a particular region or processor
       }
 
-      // if the variable is disabled on selection panel then skip it
-      const std::string selectionName(io.GetObjectName());
-      if (this->Parent->LagrangianDataArraySelection->ArrayExists(selectionName.c_str()) &&
-        !this->Parent->GetLagrangianArrayStatus(selectionName.c_str()))
+      // If the variable is disabled on selection panel then skip it
+      const std::string varDisplayName(io.GetObjectName());
+      if (this->Parent->LagrangianDataArraySelection->ArrayExists(varDisplayName.c_str()) &&
+        !this->Parent->GetLagrangianArrayStatus(varDisplayName.c_str()))
       {
         continue;
       }
@@ -9301,16 +9378,16 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
       auto fldData = vtkSmartPointer<vtkDataArray>::Take(dict.ReleasePtr<vtkDataArray>());
 
       const vtkIdType nValues = fldData->GetNumberOfTuples();
-      if (nValues != meshI->GetNumberOfCells())
+      if (nValues != nParticles)
       {
-        vtkErrorMacro(<< io.GetFileName() << ": Size mismatch for lagrangian mesh ("
-                      << meshI->GetNumberOfCells() << ") and field (" << nValues << ')');
+        vtkErrorMacro(<< io.GetFileName() << ": Size mismatch for lagrangian mesh (" << nParticles
+                      << ") and field (" << nValues << ')');
         continue;
       }
 
       // Provide identical data as cell and as point data
-      ::AddArrayToFieldData(meshI->GetCellData(), fldData, selectionName);
-      ::AddArrayToFieldData(meshI->GetPointData(), fldData, selectionName);
+      ::AddArrayToFieldData(cloudMesh->GetCellData(), fldData, varDisplayName);
+      ::AddArrayToFieldData(cloudMesh->GetPointData(), fldData, varDisplayName);
     }
   }
   return lagrangianMesh;
@@ -9841,10 +9918,9 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   const bool moveInternalPoints = !recreateInternalMesh && pointsMoved;
   const bool moveBoundaryPoints = !recreateBoundaryMesh && pointsMoved;
 
-  // RegionName check is added since subregions have region name prefixes
-  const bool createEulerians =
-    this->Parent->PatchDataArraySelection->ArrayExists(NAME_INTERNALMESH) ||
-    !this->RegionName.empty();
+  // Has eulerian fields if there is an internal mesh
+  const bool createEulerians = this->Parent->PatchDataArraySelection->ArrayExists(
+    (this->RegionPrefix() + NAME_INTERNALMESH).c_str());
 
   vtkFoamDebug(<< "RequestData (" << this->RegionName << "/" << this->ProcessorName << ")\n"
                << " internal=" << recreateInternalMesh      //
@@ -9924,7 +10000,8 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   if (createEulerians && recreateInternalMesh)
   {
     const std::string displayName(this->RegionPrefix() + NAME_INTERNALMESH);
-    if (this->Parent->GetPatchArrayStatus(displayName.c_str()))
+    if (this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()) &&
+      this->Parent->GetPatchArrayStatus(displayName.c_str()))
     {
       this->InternalMesh = this->MakeInternalMesh(*meshCells, *meshFaces, pointArray);
     }
@@ -10521,7 +10598,7 @@ int vtkOpenFOAMReader::RequestData(vtkInformation* vtkNotUsed(request),
         std::string regionName(reader->GetRegionName());
         if (regionName.empty())
         {
-          regionName = "defaultRegion";
+          regionName = "defaultRegion"; // == OpenFOAM "region0"
         }
         if (reader->HasPolyMesh()) // sanity check
         {
-- 
GitLab


From c192581d1cede60ce44045b29ac295b705fa2954 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Thu, 4 Feb 2021 14:36:59 +0100
Subject: [PATCH 14/36] openfoam: improve input mesh checks and internal
 handling

- check for illegal cell ids immediately when owner/neighbour are read.
  Handle ancient format, where neighbour had same length as owner
  but padded with '-1' as per OpenFOAM.
  Truncate neighbour list immediately so that the resulting lists
  correspond exactly to nFaces and nInternalFaces.

  With this done on input, makes various later sanity checks redundant,
  simplifies looping, can determine cell-face allocations and
  reconstruct cells anytime later.

- make cell-face construction demand-driven.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 321 +++++++++++++++---------------
 1 file changed, 160 insertions(+), 161 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 26b23244841..16944b1557a 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -1121,22 +1121,21 @@ private:
   bool ListTimeDirectoriesByInstances();
 
   // Read polyMesh/points (vectorField)
-  vtkSmartPointer<vtkFloatArray> ReadPointsFile();
+  vtkSmartPointer<vtkFloatArray> ReadPointsFile(const std::string& meshDir);
 
   // Read polyMesh/faces (faceCompactList or faceList)
   std::unique_ptr<vtkFoamLabelListList> ReadFacesFile(const std::string& meshDir);
 
-  // Read polyMesh/{owner,neighbour}, check overall number of faces. Return meshCells
-  std::unique_ptr<vtkFoamLabelListList> ReadOwnerNeighbourFiles(const std::string& meshDir);
+  // Read polyMesh/{owner,neighbour}, check overall number of faces.
+  bool ReadOwnerNeighbourFiles(const std::string& meshDir);
 
   // Create meshCells from owner/neighbour information
-  std::unique_ptr<vtkFoamLabelListList> CreateCellFaces(
-    const vtkDataArray& faceOwner, const vtkDataArray& faceNeigh);
+  std::unique_ptr<vtkFoamLabelListList> CreateCellFaces();
 
   bool CheckFaceList(const vtkFoamLabelListList& faces);
 
   // Create volume mesh
-  void InsertCellsToGrid(vtkUnstructuredGrid*, const vtkFoamLabelListList& meshCells,
+  void InsertCellsToGrid(vtkUnstructuredGrid*, std::unique_ptr<vtkFoamLabelListList>& meshCellsPtr,
     const vtkFoamLabelListList& meshFaces, vtkIdList* cellLabels = nullptr
 #if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
     ,
@@ -1144,7 +1143,7 @@ private:
 #endif
   );
 
-  vtkUnstructuredGrid* MakeInternalMesh(const vtkFoamLabelListList& meshCells,
+  vtkUnstructuredGrid* MakeInternalMesh(std::unique_ptr<vtkFoamLabelListList>& meshCellsPtr,
     const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
 
   void InsertFacesToGrid(vtkPolyData*, const vtkFoamLabelListList& meshFaces, vtkIdType startFace,
@@ -1153,8 +1152,6 @@ private:
   vtkMultiBlockDataSet* MakeBoundaryMesh(
     const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
 
-  void TruncateFaceOwner();
-
   // Move additional points for decomposed cells
   bool MoveInternalMesh(vtkUnstructuredGrid*, vtkFloatArray*);
   bool MoveBoundaryMesh(vtkMultiBlockDataSet*, vtkFloatArray*);
@@ -1182,8 +1179,9 @@ private:
   std::unique_ptr<vtkFoamDict> GatherBlocks(const char* typeName, bool mandatory);
 
   // Create (cell|face|point) zones
-  bool GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList& meshCells,
-    const vtkFoamLabelListList& meshFaces, vtkPoints*);
+  bool GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
+    std::unique_ptr<vtkFoamLabelListList>& meshCellsPtr, const vtkFoamLabelListList& meshFaces,
+    vtkPoints*);
   bool GetFaceZoneMesh(
     vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList& meshFaces, vtkPoints*);
   bool GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh, vtkPoints*);
@@ -6332,7 +6330,7 @@ void vtkOpenFOAMReaderPrivate::PopulatePolyMeshDirArrays()
 //
 // - sets NumPoints
 
-vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile()
+vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile(const std::string& meshDir)
 {
   // Assume failure
   this->NumPoints = 0;
@@ -6341,10 +6339,8 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile()
 
   // Read polyMesh/points
   {
-    const std::string pointPath =
-      this->CurrentTimeRegionMeshPath(this->PolyMeshPointsDir) + "points";
-
-    if (!io.OpenOrGzip(pointPath))
+    const std::string pointsPath(meshDir + "points");
+    if (!io.OpenOrGzip(pointsPath))
     {
       vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
       return nullptr;
@@ -6450,14 +6446,10 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadFacesFile(
 }
 
 //------------------------------------------------------------------------------
-// Read owner, neighbour files and create meshCells
-//
+// Read owner, neighbour files
 // - sets NumFaces and NumInternalFaces, and NumCells
-//
-// Return meshCells
 
-std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(
-  const std::string& meshDir)
+bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& meshDir)
 {
   // Assume failure
   this->NumCells = 0;
@@ -6470,7 +6462,7 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
     if (!io.OpenOrGzip(ownPath))
     {
       vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
-      return nullptr;
+      return false;
     }
   }
   const bool use64BitLabels = io.IsLabel64();
@@ -6495,12 +6487,31 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
     {
       vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
                     << ": " << err);
-      return nullptr;
+      return false;
     }
     io.Close();
 
     // Store owner faces
     this->FaceOwner = ownerDict.ReleasePtr<vtkDataArray>();
+    const vtkIdType nFaces = this->FaceOwner->GetNumberOfTuples();
+
+    // Count cells, check validity
+    vtkTypeInt64 nCells = -1;
+    for (vtkIdType facei = 0; facei < nFaces; ++facei)
+    {
+      const vtkTypeInt64 celli = GetLabelValue(this->FaceOwner, facei, use64BitLabels);
+      if (celli < 0)
+      {
+        vtkErrorMacro(<< "Illegal cell label in owner addressing. Face " << facei);
+        return false;
+      }
+      if (nCells < celli)
+      {
+        nCells = celli; // <- max(nCells, celli)
+      }
+    }
+
+    this->NumCells = static_cast<vtkIdType>(++nCells);
   }
 
   // Read polyMesh/neighbour
@@ -6509,7 +6520,7 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
     if (!io.OpenOrGzip(neiPath))
     {
       vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
-      return nullptr;
+      return false;
     }
   }
 
@@ -6517,7 +6528,7 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
   {
     vtkErrorMacro(<< "owner/neighbour with different label-size: should not happen"
                   << io.GetCasePath());
-    return nullptr;
+    return false;
   }
 
   {
@@ -6540,26 +6551,62 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
     {
       vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
                     << ": " << err);
-      return nullptr;
+      return false;
     }
     io.Close();
 
     // Store neighbour faces
     this->FaceNeigh = neighDict.ReleasePtr<vtkDataArray>();
+    const vtkIdType nFaces = this->FaceOwner->GetNumberOfTuples();
+
+    if (nFaces == this->FaceNeigh->GetNumberOfTuples())
+    {
+      // Extremely old meshes had identical size for owner/neighbour and -1 padding
+      vtkIdType nInternalFaces = 0;
+      for (vtkIdType facei = 0; facei < nFaces; ++facei)
+      {
+        if (GetLabelValue(this->FaceNeigh, facei, use64BitLabels) < 0)
+        {
+          break;
+        }
+        else
+        {
+          ++nInternalFaces;
+        }
+      }
+      this->FaceNeigh->Resize(nInternalFaces);
+    }
+    else
+    {
+      // Check validity
+      const vtkIdType nInternalFaces = this->FaceNeigh->GetNumberOfTuples();
+
+      for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
+      {
+        const vtkTypeInt64 celli = GetLabelValue(this->FaceNeigh, facei, use64BitLabels);
+        if (celli < 0)
+        {
+          vtkErrorMacro(<< "Illegal cell label in neighbour addressing. Face " << facei);
+          return false;
+        }
+      }
+    }
   }
 
-  // Basic checks
-  const vtkDataArray& faceOwner = *this->FaceOwner;
-  const vtkDataArray& faceNeigh = *this->FaceNeigh;
+  // Size checks
+  if (this->NumCells == 0)
+  {
+    vtkWarningMacro(<< "The mesh contains no cells");
+  }
 
-  const vtkIdType nFaces = faceOwner.GetNumberOfTuples();
-  const vtkIdType nInternalFaces = faceNeigh.GetNumberOfTuples();
+  const vtkIdType nFaces = this->FaceOwner->GetNumberOfTuples();
+  const vtkIdType nInternalFaces = this->FaceNeigh->GetNumberOfTuples();
 
   if (nFaces < nInternalFaces)
   {
     vtkErrorMacro(<< "Number of owner faces " << nFaces
                   << " not equal or greater than number of neighbour faces " << nInternalFaces);
-    return nullptr;
+    return false;
   }
 
   // Set or check number of mesh faces
@@ -6571,83 +6618,65 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadOwnerNeighbo
   {
     vtkErrorMacro(<< "Expected " << this->NumFaces << " faces, but owner had " << nFaces
                   << " faces");
-    return nullptr;
+    return false;
   }
   this->NumInternalFaces = nInternalFaces;
 
-  // The cell-faces
-  return this->CreateCellFaces(faceOwner, faceNeigh);
+  return true;
 }
 
 //------------------------------------------------------------------------------
 // Create meshCells from owner/neighbour information
 //
-// - sets NumFaces and NumInternalFaces (again), and NumCells
-//
-// Return meshCells
-std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::CreateCellFaces(
-  const vtkDataArray& faceOwner, const vtkDataArray& faceNeigh)
+// - sets NumFaces and NumInternalFaces (again), optionally NumCells
+
+std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::CreateCellFaces()
 {
-  // Reset
-  this->NumCells = 0;
+  if (!this->FaceOwner)
+  {
+    vtkErrorMacro(<< "Cannot create cell faces without face owner information");
+    return nullptr;
+  }
+  if (!this->FaceNeigh)
+  {
+    vtkErrorMacro(<< "Cannot create cell faces without face neighbour information");
+    return nullptr;
+  }
+  const bool use64BitLabels = ::Is64BitArray(this->FaceOwner);
 
-  const bool use64BitLabels = ::Is64BitArray(&faceOwner);
+  const vtkDataArray& faceOwner = *this->FaceOwner;
+  const vtkDataArray& faceNeigh = *this->FaceNeigh;
 
   const vtkIdType nFaces = faceOwner.GetNumberOfTuples();
   const vtkIdType nInternalFaces = faceNeigh.GetNumberOfTuples();
 
-  // Extra safety
+  // Extra safety (consistency)
   this->NumFaces = nFaces;
   this->NumInternalFaces = nInternalFaces;
 
-  // Determine the number of cells and number of cell faces (total)
-  vtkTypeInt64 nCells = -1;
-  vtkTypeInt64 nTotalCellFaces = 0;
-
-  for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
+  // Recalculate number of cells if needed
+  if (this->NumCells == 0)
   {
-    const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-    if (own >= 0)
+    vtkTypeInt64 nCells = -1;
+    for (vtkIdType facei = 0; facei < nFaces; ++facei)
     {
-      ++nTotalCellFaces;
-      if (nCells < own)
+      const vtkTypeInt64 celli = GetLabelValue(&faceOwner, facei, use64BitLabels);
+      if (nCells < celli)
       {
-        nCells = own; // <- max(nCells, own)
+        nCells = celli; // <- max(nCells, celli)
       }
     }
 
-    const vtkTypeInt64 nei = GetLabelValue(&faceNeigh, facei, use64BitLabels);
-    if (nei >= 0)
-    {
-      ++nTotalCellFaces;
-      if (nCells < nei)
-      {
-        nCells = nei; // <- max(nCells, nei)
-      }
-    }
+    // Set the number of cells
+    this->NumCells = static_cast<vtkIdType>(++nCells);
   }
 
-  for (vtkIdType facei = nInternalFaces; facei < nFaces; ++facei)
-  {
-    const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-    if (own >= 0)
-    {
-      ++nTotalCellFaces;
-      if (nCells < own)
-      {
-        nCells = own; // <- max(nCells, own)
-      }
-    }
-  }
-  ++nCells;
-
-  if (nCells == 0)
-  {
-    vtkWarningMacro(<< "The mesh contains no cells");
-  }
+  // The number of cells
+  const vtkTypeInt64 nCells = this->NumCells;
 
-  // Set the number of cells
-  this->NumCells = static_cast<vtkIdType>(nCells);
+  // Total number of cell faces
+  const vtkTypeInt64 nTotalCellFaces =
+    static_cast<vtkTypeInt64>(nFaces) + static_cast<vtkTypeInt64>(nInternalFaces);
 
   // Create meshCells. Avoid 32bit overflow for nTotalCellFaces
   std::unique_ptr<vtkFoamLabelListList> meshCells;
@@ -6670,28 +6699,15 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::CreateCellFaces(
     // Accumulate offsets into slot *above*
     constexpr vtkIdType cellIndexOffset = 1;
 
-    for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
+    for (vtkIdType facei = 0; facei < nFaces; ++facei)
     {
-      const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-      if (own >= 0)
-      {
-        cells.IncrementOffset(cellIndexOffset + own);
-      }
-
-      const vtkTypeInt64 nei = GetLabelValue(&faceNeigh, facei, use64BitLabels);
-      if (nei >= 0)
-      {
-        cells.IncrementOffset(cellIndexOffset + nei);
-      }
+      const vtkTypeInt64 celli = GetLabelValue(&faceOwner, facei, use64BitLabels);
+      cells.IncrementOffset(cellIndexOffset + celli);
     }
-
-    for (vtkIdType facei = nInternalFaces; facei < nFaces; ++facei)
+    for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
     {
-      const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-      if (own >= 0)
-      {
-        cells.IncrementOffset(cellIndexOffset + own);
-      }
+      const vtkTypeInt64 celli = GetLabelValue(&faceNeigh, facei, use64BitLabels);
+      cells.IncrementOffset(cellIndexOffset + celli);
     }
 
     // Reduce per-cell face count -> start offsets
@@ -6719,30 +6735,29 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::CreateCellFaces(
   // Add face numbers to cell-faces list, using tmpAddr offsets to manage the locations
   for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
   {
-    const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-    if (own >= 0)
+    // owner
     {
-      const vtkTypeInt64 next = tmpAddr->GetBeginOffset(own);
-      tmpAddr->IncrementOffset(own);
+      const vtkTypeInt64 celli = GetLabelValue(&faceOwner, facei, use64BitLabels);
+      const vtkTypeInt64 next = tmpAddr->GetBeginOffset(celli);
+      tmpAddr->IncrementOffset(celli);
       cells.SetValue(next, facei);
     }
-
-    const vtkTypeInt64 nei = GetLabelValue(&faceNeigh, facei, use64BitLabels);
-    if (nei >= 0)
+    // neighbour
     {
-      const vtkTypeInt64 next = tmpAddr->GetBeginOffset(nei);
-      tmpAddr->IncrementOffset(nei);
+      const vtkTypeInt64 celli = GetLabelValue(&faceNeigh, facei, use64BitLabels);
+      const vtkTypeInt64 next = tmpAddr->GetBeginOffset(celli);
+      tmpAddr->IncrementOffset(celli);
       cells.SetValue(next, facei);
     }
   }
 
   for (vtkIdType facei = nInternalFaces; facei < nFaces; ++facei)
   {
-    const vtkTypeInt64 own = GetLabelValue(&faceOwner, facei, use64BitLabels);
-    if (own >= 0)
+    // owner
     {
-      const vtkTypeInt64 next = tmpAddr->GetBeginOffset(own);
-      tmpAddr->IncrementOffset(own);
+      const vtkTypeInt64 celli = GetLabelValue(&faceOwner, facei, use64BitLabels);
+      const vtkTypeInt64 next = tmpAddr->GetBeginOffset(celli);
+      tmpAddr->IncrementOffset(celli);
       cells.SetValue(next, facei);
     }
   }
@@ -6785,7 +6800,7 @@ bool vtkOpenFOAMReaderPrivate::CheckFaceList(const vtkFoamLabelListList& faces)
 // determine cell shape and insert the cell into the mesh
 // hexahedron, prism, pyramid, tetrahedron and decompose polyhedron
 void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
-  vtkUnstructuredGrid* internalMesh, const vtkFoamLabelListList& meshCells,
+  vtkUnstructuredGrid* internalMesh, std::unique_ptr<vtkFoamLabelListList>& meshCellsPtr,
   const vtkFoamLabelListList& meshFaces, vtkIdList* cellLabels
 #if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   ,
@@ -6821,6 +6836,15 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
     return;
   }
 #endif
+  if (!nCells)
+  {
+    return;
+  }
+  if (!meshCellsPtr)
+  {
+    meshCellsPtr = this->CreateCellFaces();
+  }
+  const auto& meshCells = *meshCellsPtr;
 
   for (vtkIdType celli = 0; celli < nCells; ++celli)
   {
@@ -7610,7 +7634,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
 //------------------------------------------------------------------------------
 // derive cell types and create the internal mesh
 vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
-  const vtkFoamLabelListList& meshCells, const vtkFoamLabelListList& meshFaces,
+  std::unique_ptr<vtkFoamLabelListList>& meshCellsPtr, const vtkFoamLabelListList& meshFaces,
   vtkFloatArray* pointArray)
 {
   // Create Mesh
@@ -7630,7 +7654,7 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
     additionalCells->SetNumberOfComponents(5); // Accommodate tetra or pyramid
 
     this->InsertCellsToGrid(
-      internalMesh, meshCells, meshFaces, nullptr, additionalCells, pointArray);
+      internalMesh, meshCellsPtr, meshFaces, nullptr, additionalCells, pointArray);
 
     // For polyhedral decomposition
     pointArray->Squeeze();
@@ -7657,7 +7681,7 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
   else
 #endif // VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
   {
-    this->InsertCellsToGrid(internalMesh, meshCells, meshFaces);
+    this->InsertCellsToGrid(internalMesh, meshCellsPtr, meshFaces);
   }
 
   // Set points for internalMesh
@@ -8057,28 +8081,6 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
   return boundaryMesh;
 }
 
-//------------------------------------------------------------------------------
-// truncate face owner to have only boundary face info
-void vtkOpenFOAMReaderPrivate::TruncateFaceOwner()
-{
-  const vtkIdType boundaryStartFace =
-    (!this->BoundaryDict.empty() ? this->BoundaryDict.startFace()
-                                 : this->FaceOwner->GetNumberOfTuples());
-
-  // All boundary faces
-  const vtkIdType nBoundaryFaces = this->FaceOwner->GetNumberOfTuples() - boundaryStartFace;
-  memmove(this->FaceOwner->GetVoidPointer(0), this->FaceOwner->GetVoidPointer(boundaryStartFace),
-    static_cast<size_t>(this->FaceOwner->GetDataTypeSize() * nBoundaryFaces));
-  this->FaceOwner->Resize(nBoundaryFaces);
-
-  // Has side effect on neighbour too
-  if (this->FaceNeigh != nullptr)
-  {
-    this->FaceNeigh->Delete();
-    this->FaceNeigh = nullptr;
-  }
-}
-
 //------------------------------------------------------------------------------
 // Move mesh points, including the cell centroids for any decomposed polyhedra
 bool vtkOpenFOAMReaderPrivate::MoveInternalMesh(
@@ -9430,7 +9432,8 @@ std::unique_ptr<vtkFoamDict> vtkOpenFOAMReaderPrivate::GatherBlocks(
 // Populate cell zone(s) mesh
 
 bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
-  const vtkFoamLabelListList& meshCells, const vtkFoamLabelListList& meshFaces, vtkPoints* points)
+  std::unique_ptr<vtkFoamLabelListList>& meshCellsPtr, const vtkFoamLabelListList& meshFaces,
+  vtkPoints* points)
 {
   const bool supportFields = this->Parent->CopyDataToCellZones;
 
@@ -9536,7 +9539,7 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     zm->Allocate(nUsed);
 
     // Insert cells
-    this->InsertCellsToGrid(zm, meshCells, meshFaces, elemIds);
+    this->InsertCellsToGrid(zm, meshCellsPtr, meshFaces, elemIds);
 
     // Set points for zone
     zm->SetPoints(points);
@@ -9951,17 +9954,16 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   }
 
   // Mesh primitives
+  vtkSmartPointer<vtkFloatArray> pointArray;
   std::unique_ptr<vtkFoamLabelListList> meshCells;
   std::unique_ptr<vtkFoamLabelListList> meshFaces;
 
-  std::string meshDir;
   if (createEulerians && (recreateInternalMesh || recreateBoundaryMesh))
   {
-    // Path to polyMesh/ files
-    meshDir = this->CurrentTimeRegionMeshPath(this->PolyMeshFacesDir);
+    const std::string facesInstance = this->CurrentTimeRegionMeshPath(this->PolyMeshFacesDir);
 
     // Read polyMesh/faces, create the list of faces, set the number of faces
-    meshFaces = this->ReadFacesFile(meshDir);
+    meshFaces = this->ReadFacesFile(facesInstance);
     if (!meshFaces)
     {
       return 0;
@@ -9971,23 +9973,25 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
 
   if (createEulerians && recreateInternalMesh)
   {
-    // Read polyMesh/{owner,neighbour}, create FaceOwner/FaceNeigh and meshCells vectors
-    meshCells = this->ReadOwnerNeighbourFiles(meshDir);
-    if (!meshCells)
+    const std::string facesInstance = this->CurrentTimeRegionMeshPath(this->PolyMeshFacesDir);
+
+    // Read polyMesh/{owner,neighbour}, create FaceOwner/FaceNeigh
+    if (!this->ReadOwnerNeighbourFiles(facesInstance))
     {
       return 0;
     }
     this->Parent->UpdateProgress(0.3);
   }
 
-  vtkSmartPointer<vtkFloatArray> pointArray;
   if (createEulerians &&
     (recreateInternalMesh ||
       (recreateBoundaryMesh && !recreateInternalMesh && this->InternalMesh == nullptr) ||
       moveInternalPoints || moveBoundaryPoints))
   {
+    const std::string pointsInstance = this->CurrentTimeRegionMeshPath(this->PolyMeshPointsDir);
+
     // Read polyMesh/points, set the number of faces
-    pointArray = this->ReadPointsFile();
+    pointArray = this->ReadPointsFile(pointsInstance);
     if ((recreateInternalMesh && pointArray.Get() == nullptr) ||
       (meshFaces && !this->CheckFaceList(*meshFaces)))
     {
@@ -10003,7 +10007,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     if (this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()) &&
       this->Parent->GetPatchArrayStatus(displayName.c_str()))
     {
-      this->InternalMesh = this->MakeInternalMesh(*meshCells, *meshFaces, pointArray);
+      this->InternalMesh = this->MakeInternalMesh(meshCells, *meshFaces, pointArray);
     }
   }
 
@@ -10025,7 +10029,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     }
 
     this->CellZoneMesh = vtkMultiBlockDataSet::New();
-    if (!this->GetCellZoneMesh(this->CellZoneMesh, *meshCells, *meshFaces, points) ||
+    if (!this->GetCellZoneMesh(this->CellZoneMesh, meshCells, *meshFaces, points) ||
       this->CellZoneMesh->GetNumberOfBlocks() == 0)
     {
       this->cellZoneMap.clearAll();
@@ -10055,12 +10059,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   // Don't need meshCells beyond here
   meshCells.reset(nullptr);
 
-  // Only need boundary face owners beyond here,
-  // except if we have faceZones, then we still need them
-  if (createEulerians && recreateInternalMesh && !this->FaceZoneMesh)
-  {
-    this->TruncateFaceOwner();
-  }
+  // Note: preserve face owner/neighbour information for reconstruction, face zones etc.
 
   // Create boundary mesh
   if (createEulerians && recreateBoundaryMesh)
-- 
GitLab


From 91b8eb62a635984edf2e3cc67f5dc4c001404458 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 5 Feb 2021 10:16:25 +0100
Subject: [PATCH 15/36] openfoam: various code cleanup

- remove unused elements
- improve code isolation for low-level file IO
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 516 ++++++++++++++++--------------
 1 file changed, 269 insertions(+), 247 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 16944b1557a..94d93d85606 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -974,14 +974,13 @@ public:
 private:
   vtkOpenFOAMReader* Parent;
 
-  // Case and region
-  std::string CasePath;
-  std::string RegionName;
-  std::string ProcessorName;
-
-  // time information
-  vtkDoubleArray* TimeValues;
-  vtkStringArray* TimeNames;
+  std::string CasePath;      // The full path to the case - includes trailing '/'
+  std::string RegionName;    // Region name. Empty for default region
+  std::string ProcessorName; // Processor subdirectory. Empty for serial case
+
+  // Time information
+  vtkDoubleArray* TimeValues; // Time values
+  vtkStringArray* TimeNames;  // Directory names
   int TimeStep;
   int TimeStepOld;
 
@@ -1086,8 +1085,13 @@ private:
       (displayName.compare(1, slash1 - 1, this->RegionName) == 0);
   }
 
+  // The timeName for the given index, with special handling for "constant" time directory
   std::string TimePath(int timeIndex) const
   {
+    if (timeIndex < 0)
+    {
+      return this->CasePath + "constant";
+    }
     return this->CasePath + this->TimeNames->GetValue(timeIndex);
   }
   std::string TimeRegionPath(int timeIndex) const
@@ -1095,6 +1099,7 @@ private:
     return this->TimePath(timeIndex) + this->RegionPath();
   }
   std::string CurrentTimePath() const { return this->TimePath(this->TimeStep); }
+
   std::string CurrentTimeRegionPath() const { return this->TimeRegionPath(this->TimeStep); }
   std::string CurrentTimeRegionMeshPath(vtkStringArray* dir) const
   {
@@ -1376,33 +1381,33 @@ public:
   // The OpenFOAM input stream format is ASCII or BINARY
   enum fileFormat : unsigned char
   {
-    ASCII = 0, // Default is ASCII unless otherwise specified
+    ASCII = 0, // ASCII unless otherwise specified
     BINARY
   };
 
-  // Bitwidth of an OpenFOAM label (integer type)
+  // Bitwidth of an OpenFOAM label (integer type).
+  // Corresponds to WM_LABEL_SIZE (32|64)
   enum labelType : unsigned char
   {
-    UNKNOWN_LABEL = 0, // For assertions
     INT32,
     INT64
   };
 
   // Bitwidth of an OpenFOAM scalar (floating-point type)
+  // Corresponds to WM_PRECISION_OPTION (SP|DP|SPDP)
   enum scalarType : unsigned char
   {
-    UNKNOWN_SCALAR = 0, // For assertions
     FLOAT32,
     FLOAT64
   };
 
 private:
   fileFormat Format = fileFormat::ASCII;
-  labelType LabelType = labelType::UNKNOWN_LABEL;
+  labelType LabelType = labelType::INT32;
   scalarType ScalarType = scalarType::FLOAT64;
 
 public:
-  // Default construct
+  // Default construct. ASCII, Int32, double precision
   vtkFoamStreamOption() = default;
 
   // Construct with specified handling for labels/floats
@@ -1412,33 +1417,27 @@ public:
     this->SetFloat64(use64BitFloats);
   }
 
-  fileFormat GetFormat() const { return this->Format; }
-  bool IsAsciiFormat() const { return this->Format != fileFormat::BINARY; }
-  void SetUseBinaryFormat(const bool on)
+  bool IsAsciiFormat() const noexcept { return this->Format == fileFormat::ASCII; }
+  bool IsLabel64() const noexcept { return this->LabelType == labelType::INT64; }
+  bool IsFloat64() const noexcept { return this->ScalarType == scalarType::FLOAT64; }
+
+  void SetBinaryFormat(const bool on)
   {
     this->Format = (on ? fileFormat::BINARY : fileFormat::ASCII);
   }
-
-  labelType GetLabelType() const { return this->LabelType; }
-  bool IsLabel64() const { return this->LabelType == labelType::INT64; }
-  bool HasLabelType() const noexcept { return this->LabelType != labelType::UNKNOWN_LABEL; }
-  void SetLabelType(labelType t) { this->LabelType = t; }
-  void SetLabel64(const bool on) { this->LabelType = (on ? labelType::INT64 : labelType::INT32); }
-
-  scalarType GetScalarType() const { return this->ScalarType; }
-  bool IsFloat64() const { return this->ScalarType == scalarType::FLOAT64; }
-
-  void SetScalarType(scalarType t) { this->ScalarType = t; }
-  void SetFloat64(const bool on)
+  void SetLabel64(const bool on) noexcept
+  {
+    this->LabelType = (on ? labelType::INT64 : labelType::INT32);
+  }
+  void SetFloat64(const bool on) noexcept
   {
     this->ScalarType = (on ? scalarType::FLOAT64 : scalarType::FLOAT32);
   }
-
-  const vtkFoamStreamOption& GetStreamOption() const
+  const vtkFoamStreamOption& GetStreamOption() const noexcept
   {
     return static_cast<const vtkFoamStreamOption&>(*this);
   }
-  void SetStreamOption(const vtkFoamStreamOption& opt)
+  void SetStreamOption(const vtkFoamStreamOption& opt) noexcept
   {
     static_cast<vtkFoamStreamOption&>(*this) = opt;
   }
@@ -1571,17 +1570,13 @@ public:
   // Token represents punctuation
   bool IsPunctuation() const noexcept { return this->Type == PUNCTUATION; }
 
-  // Token represents a numerical value
+  // Token represents an integer value
   bool IsLabel() const noexcept { return this->Type == LABEL || this->Type == SCALAR; }
 
   // Token represents a numerical value
   bool IsNumeric() const noexcept { return this->Type == LABEL || this->Type == SCALAR; }
 
-  vtkTypeInt64 ToInt() const
-  {
-    assert("Label type not set!" && this->HasLabelType());
-    return this->Int;
-  }
+  vtkTypeInt64 ToInt() const noexcept { return this->Int; }
 
   // Mostly the same as To<float>, with additional check
   float ToFloat() const
@@ -1623,27 +1618,20 @@ public:
   void operator=(const vtkTypeInt32 value)
   {
     this->Clear();
-
-    assert("Label type not set!" && this->HasLabelType());
     if (this->IsLabel64())
     {
-      vtkGenericWarningMacro("Setting a 64 bit label from a 32 bit integer.");
+      vtkGenericWarningMacro("Assigning int32 label to int64");
     }
-
     this->Type = LABEL;
     this->Int = static_cast<vtkTypeInt32>(value);
   }
   void operator=(const vtkTypeInt64 value)
   {
     this->Clear();
-
-    assert("Label type not set!" && this->HasLabelType());
     if (!this->IsLabel64())
     {
-      vtkGenericWarningMacro("Setting a 32 bit label from a 64 bit integer. "
-                             "Precision loss may occur.");
+      vtkGenericWarningMacro("Assigning int64 label to int32 - may lose precision");
     }
-
     this->Type = LABEL;
     this->Int = value;
   }
@@ -1679,12 +1667,10 @@ public:
   }
   bool operator==(const vtkTypeInt32 value) const
   {
-    assert("Label type not set!" && this->HasLabelType());
     return this->Type == LABEL && this->Int == static_cast<vtkTypeInt64>(value);
   }
   bool operator==(const vtkTypeInt64 value) const
   {
-    assert("Label type not set!" && this->HasLabelType());
     return this->Type == LABEL && this->Int == value;
   }
   bool operator==(const std::string& value) const
@@ -1697,47 +1683,37 @@ public:
   }
   bool operator!=(const char value) const { return !this->operator==(value); }
 
-  friend std::ostringstream& operator<<(std::ostringstream& str, const vtkFoamToken& tok)
+  friend std::ostringstream& operator<<(std::ostringstream& os, const vtkFoamToken& tok)
   {
     switch (tok.GetType())
     {
       case TOKEN_ERROR:
-        str << "badToken (an unexpected EOF?)";
+        os << "badToken (an unexpected EOF?)";
         break;
       case PUNCTUATION:
-        str << tok.Char;
+        os << tok.Char;
         break;
       case LABEL:
-        assert("Label type not set!" && tok.HasLabelType());
         if (tok.IsLabel64())
         {
-          str << tok.Int;
+          os << tok.Int;
         }
         else
         {
-          str << static_cast<vtkTypeInt32>(tok.Int);
+          os << static_cast<vtkTypeInt32>(tok.Int);
         }
         break;
       case SCALAR:
-        str << tok.Double;
+        os << tok.Double;
         break;
       case STRING:
       case IDENTIFIER:
-        str << *(tok.String);
+        os << *(tok.String);
         break;
-      case UNDEFINED:
-      case STRINGLIST:
-      case LABELLIST:
-      case SCALARLIST:
-      case VECTORLIST:
-      case LABELLISTLIST:
-      case ENTRYVALUELIST:
-      case BOOLLIST:
-      case EMPTYLIST:
-      case DICTIONARY:
+      default:
         break;
     }
-    return str;
+    return os;
   }
 };
 
@@ -1751,14 +1727,12 @@ inline bool vtkFoamToken::Is<vtkTypeInt8>() const
 template <>
 inline bool vtkFoamToken::Is<vtkTypeInt32>() const
 {
-  assert("Label type not set!" && this->HasLabelType());
   return this->Type == LABEL && !(this->IsLabel64());
 }
 
 template <>
 inline bool vtkFoamToken::Is<vtkTypeInt64>() const
 {
-  assert("Label type not set!" && this->HasLabelType());
   return this->Type == LABEL;
 }
 
@@ -1784,11 +1758,9 @@ inline vtkTypeInt8 vtkFoamToken::To<vtkTypeInt8>() const
 template <>
 inline vtkTypeInt32 vtkFoamToken::To<vtkTypeInt32>() const
 {
-  assert("Label type not set!" && this->HasLabelType());
   if (this->IsLabel64())
   {
-    vtkGenericWarningMacro("Casting 64 bit label to int32. Precision loss "
-                           "may occur.");
+    vtkGenericWarningMacro("Casting int64 label to int32 - may lose precision");
   }
   return static_cast<vtkTypeInt32>(this->Int);
 }
@@ -1796,7 +1768,6 @@ inline vtkTypeInt32 vtkFoamToken::To<vtkTypeInt32>() const
 template <>
 inline vtkTypeInt64 vtkFoamToken::To<vtkTypeInt64>() const
 {
-  assert("Label type not set!" && this->HasLabelType());
   return this->Int;
 }
 
@@ -1818,17 +1789,16 @@ inline double vtkFoamToken::To<double>() const
 struct vtkFoamFileStack
 {
 protected:
-  vtkOpenFOAMReader* Reader;
+  vtkOpenFOAMReader* Reader; // GUI preference
   std::string FileName;
   FILE* File;
-  bool IsCompressed;
   z_stream Z;
   int ZStatus;
   int LineNumber;
+  bool IsCompressed;
 #if VTK_FOAMFILE_RECOGNIZE_LINEHEAD
   bool WasNewline;
 #endif
-
   // buffer pointers. using raw pointers for performance reason.
   unsigned char* Inbuf;
   unsigned char* Outbuf;
@@ -1838,9 +1808,9 @@ protected:
   vtkFoamFileStack(vtkOpenFOAMReader* reader)
     : Reader(reader)
     , File(nullptr)
-    , IsCompressed(false)
     , ZStatus(Z_OK)
     , LineNumber(0)
+    , IsCompressed(false)
 #if VTK_FOAMFILE_RECOGNIZE_LINEHEAD
     , WasNewline(true)
 #endif
@@ -1858,12 +1828,12 @@ protected:
   {
     // this->FileName = "";
     this->File = nullptr;
-    this->IsCompressed = false;
     // this->ZStatus = Z_OK;
     this->Z.zalloc = Z_NULL;
     this->Z.zfree = Z_NULL;
     this->Z.opaque = Z_NULL;
     // this->LineNumber = 0;
+    this->IsCompressed = false;
 #if VTK_FOAMFILE_RECOGNIZE_LINEHEAD
     this->WasNewline = true;
 #endif
@@ -1877,7 +1847,90 @@ protected:
 public:
   const std::string& GetFileName() const noexcept { return this->FileName; }
   int GetLineNumber() const noexcept { return this->LineNumber; }
-  vtkOpenFOAMReader* GetReader() const noexcept { return this->Reader; }
+
+  // Try to open the file. Return non-empty error string on failure
+  vtkFoamError TryOpen(const std::string& fileName)
+  {
+    vtkFoamError errors;
+    do
+    {
+      // Line number 0 to indicate beginning of file when an exception is thrown
+      this->LineNumber = 0;
+      this->FileName = fileName;
+
+      if (this->File)
+      {
+        errors << "File already opened within this object";
+        break;
+      }
+      this->File = vtksys::SystemTools::Fopen(this->FileName, "rb");
+      if (this->File == nullptr)
+      {
+        errors << "Cannot open file for reading";
+        break;
+      }
+
+      unsigned char zMagic[2];
+      if (fread(zMagic, 1, 2, this->File) == 2 && zMagic[0] == 0x1f && zMagic[1] == 0x8b)
+      {
+        // gzip-compressed format
+        this->Z.avail_in = 0;
+        this->Z.next_in = Z_NULL;
+        // + 32 to automatically recognize gzip format
+        if (inflateInit2(&this->Z, 15 + 32) == Z_OK)
+        {
+          this->IsCompressed = true;
+          this->Inbuf = new unsigned char[VTK_FOAMFILE_INBUFSIZE];
+        }
+        else
+        {
+          fclose(this->File);
+          this->File = nullptr;
+
+          errors << "Cannot init zstream";
+          if (this->Z.msg)
+          {
+            errors << " " << this->Z.msg;
+          }
+          break;
+        }
+      }
+      else
+      {
+        this->IsCompressed = false;
+      }
+      rewind(this->File);
+
+      this->ZStatus = Z_OK;
+      this->Outbuf = new unsigned char[VTK_FOAMFILE_OUTBUFSIZE + 1];
+      this->BufPtr = this->Outbuf + 1;
+      this->BufEndPtr = this->BufPtr;
+      this->LineNumber = 1;
+    } while (false);
+
+    return errors;
+  }
+
+  void CloseCurrentFile()
+  {
+    if (this->IsCompressed)
+    {
+      inflateEnd(&this->Z);
+    }
+
+    delete[] this->Inbuf;
+    delete[] this->Outbuf;
+    this->Inbuf = this->Outbuf = nullptr;
+
+    if (this->File)
+    {
+      fclose(this->File);
+      this->File = nullptr;
+    }
+    // don't reset the line number so that the last line number is
+    // retained after close
+    // lineNumber_ = 0;
+  }
 };
 
 //------------------------------------------------------------------------------
@@ -1890,9 +1943,29 @@ struct vtkFoamFile
 private:
   typedef vtkFoamFileStack Superclass;
 
+  // Find last slash (os-specific)
+  static size_t rfind_slash(const std::string& str, size_t pos = std::string::npos) noexcept
+  {
+#if defined(_WIN32)
+    return str.find_last_of("/\\", pos);
+#else
+    return str.find_last_of('/', pos);
+#endif
+  }
+
+  // String equivalent cwd (os-specific)
+  static std::string cwd_string() noexcept
+  {
+#if defined(_WIN32)
+    return std::string(".\\");
+#else
+    return std::string("./");
+#endif
+  }
+
 public:
   // The dictionary #inputMode values
-  enum inputModes
+  enum inputMode
   {
     INPUT_MODE_MERGE,
     INPUT_MODE_OVERWRITE,
@@ -1901,22 +1974,14 @@ public:
     INPUT_MODE_ERROR
   };
 
-  // Check for existence of specified file
-  static bool IsFile(const std::string& file, bool checkGzip = true)
-  {
-    return (vtksys::SystemTools::FileExists(file, true) ||
-      (checkGzip && vtksys::SystemTools::FileExists(file + ".gz", true)));
-  }
-
   // Generic exception throwing with stack trace
   void ThrowStackTrace(const std::string& msg);
 
 private:
-  // The path to the case
-  std::string CasePath;
+  std::string CasePath; // The full path to the case - includes trailing '/'
 
   // The current input mode
-  inputModes InputMode;
+  inputMode InputMode;
 
   // Handling include files
   vtkFoamFileStack* Stack[VTK_FOAMFILE_INCLUDE_STACK_SIZE];
@@ -1972,54 +2037,78 @@ private:
     {
       return false;
     }
-    this->Clear();
     this->StackI--;
+    this->Superclass::CloseCurrentFile();
     // use the default bitwise assignment operator
     this->Superclass::operator=(*this->Stack[this->StackI]);
     delete this->Stack[this->StackI];
     return true;
   }
 
-  void Clear()
+public:
+  // No default construct, copy or assignment
+  vtkFoamFile() = delete;
+  vtkFoamFile(const vtkFoamFile&) = delete;
+  void operator=(const vtkFoamFile&) = delete;
+
+  vtkFoamFile(const std::string& casePath, vtkOpenFOAMReader* reader)
+    : vtkFoamStreamOption(reader->GetUse64BitLabels(), reader->GetUse64BitFloats())
+    , vtkFoamFileStack(reader)
+    , CasePath(casePath)
+    , InputMode(INPUT_MODE_MERGE)
+    , StackI(0)
   {
-    if (this->Superclass::IsCompressed)
-    {
-      inflateEnd(&this->Superclass::Z);
-    }
+  }
+  ~vtkFoamFile() { this->Close(); }
 
-    delete[] this->Superclass::Inbuf;
-    delete[] this->Superclass::Outbuf;
-    this->Superclass::Inbuf = this->Superclass::Outbuf = nullptr;
+  std::string GetCasePath() const noexcept { return this->CasePath; }
+  std::string GetFilePath() const { return vtkFoamFile::ExtractPath(this->FileName); }
+  inputMode GetInputMode() const noexcept { return this->InputMode; }
 
-    if (this->Superclass::File)
+  void Open(const std::string& fileName)
+  {
+    vtkFoamError err = this->Superclass::TryOpen(fileName);
+    if (!err.empty())
     {
-      fclose(this->Superclass::File);
-      this->Superclass::File = nullptr;
+      this->ThrowStackTrace(err);
     }
-    // don't reset the line number so that the last line number is
-    // retained after close
-    // lineNumber_ = 0;
+  }
+
+  void Close()
+  {
+    while (this->CloseIncludedFile())
+      ;
+    this->CloseCurrentFile();
+
+    // Reinstate values from reader (eg, GUI)
+    auto& streamOpt = static_cast<vtkFoamStreamOption&>(*this);
+    streamOpt.SetLabel64(this->Reader->GetUse64BitLabels());
+    streamOpt.SetFloat64(this->Reader->GetUse64BitFloats());
+  }
+
+  // Static File Functions
+
+  // Check for existence of specified file
+  static bool IsFile(const std::string& file, bool checkGzip = true)
+  {
+    return (vtksys::SystemTools::FileExists(file, true) ||
+      (checkGzip && vtksys::SystemTools::FileExists(file + ".gz", true)));
   }
 
   //! Return file name (part beyond last /)
-  std::string ExtractName(const std::string& path) const
+  static std::string ExtractName(const std::string& path)
   {
-#if defined(_WIN32)
-    const std::string pathFindSeparator = "/\\", pathSeparator = "\\";
-#else
-    const std::string pathFindSeparator = "/", pathSeparator = "/";
-#endif
-    auto pos = path.find_last_of(pathFindSeparator);
+    auto pos = vtkFoamFile::rfind_slash(path);
     if (pos == std::string::npos)
     {
       // no slash
       return path;
     }
-    else if (pos + 1 == path.size())
+    else if (pos + 1 == path.length())
     {
-      // final trailing slash
+      // trailing slash
       const auto endPos = pos;
-      pos = path.find_last_of(pathFindSeparator, pos - 1);
+      pos = vtkFoamFile::rfind_slash(path, pos - 1);
       if (pos == std::string::npos)
       {
         // no further slash
@@ -2036,38 +2125,14 @@ private:
     }
   }
 
-  //! Return directory path name (part before last /)
-  std::string ExtractPath(const std::string& path) const
-  {
-#if defined(_WIN32)
-    const std::string pathFindSeparator = "/\\", pathSeparator = "\\";
-#else
-    const std::string pathFindSeparator = "/", pathSeparator = "/";
-#endif
-    const auto pos = path.find_last_of(pathFindSeparator);
-    return pos == std::string::npos ? std::string(".") + pathSeparator : path.substr(0, pos + 1);
-  }
-
-public:
-  // No default construct, copy or assignment
-  vtkFoamFile() = delete;
-  vtkFoamFile(const vtkFoamFile&) = delete;
-  void operator=(const vtkFoamFile&) = delete;
-
-  vtkFoamFile(const std::string& casePath, vtkOpenFOAMReader* reader)
-    : vtkFoamStreamOption(reader->GetUse64BitLabels(), reader->GetUse64BitFloats())
-    , vtkFoamFileStack(reader)
-    , CasePath(casePath)
-    , InputMode(INPUT_MODE_MERGE)
-    , StackI(0)
+  //! Return directory path name (part before last /). Return includes trailing slash!
+  static std::string ExtractPath(const std::string& path)
   {
+    const auto pos = vtkFoamFile::rfind_slash(path);
+    return pos == std::string::npos ? vtkFoamFile::cwd_string() : path.substr(0, pos + 1);
   }
-  ~vtkFoamFile() { this->Close(); }
-
-  std::string GetCasePath() const noexcept { return this->CasePath; }
-  std::string GetFilePath() const { return this->ExtractPath(this->FileName); }
 
-  inputModes GetInputMode() const noexcept { return this->InputMode; }
+  // Member Functions
 
   std::string ExpandPath(const std::string& pathIn, const std::string& defaultPath)
   {
@@ -2132,7 +2197,7 @@ public:
           else if (variable == "FOAM_CASENAME")
           {
             // FOAM_CASENAME is the final directory name from CasePath
-            expandedPath += this->ExtractName(this->CasePath);
+            expandedPath += vtkFoamFile::ExtractName(this->CasePath);
             wasPathSeparator = false;
             isExpanded = true;
           }
@@ -2223,7 +2288,7 @@ public:
                 // No fallback
                 homeDir.clear();
               }
-              expandedPath = this->ExtractPath(homeDir) + userName;
+              expandedPath = vtkFoamFile::ExtractPath(homeDir) + userName;
 #else
               const struct passwd* pwentry = getpwnam(userName.c_str());
               if (pwentry == nullptr)
@@ -2463,7 +2528,7 @@ public:
           {
             this->ThrowStackTrace("Unexpected EOF reading filename");
           }
-          this->IncludeFile(fileNameToken.ToString(), this->ExtractPath(this->FileName));
+          this->IncludeFile(fileNameToken.ToString(), vtkFoamFile::ExtractPath(this->FileName));
         }
         else if (directiveToken == "sinclude" || directiveToken == "includeIfPresent")
         {
@@ -2475,14 +2540,14 @@ public:
 
           // special treatment since the file is allowed to be missing
           const std::string fullName =
-            this->ExpandPath(fileNameToken.ToString(), this->ExtractPath(this->FileName));
+            this->ExpandPath(fileNameToken.ToString(), vtkFoamFile::ExtractPath(this->FileName));
 
           FILE* fh = vtksys::SystemTools::Fopen(fullName, "rb");
           if (fh)
           {
             fclose(fh);
 
-            this->IncludeFile(fileNameToken.ToString(), this->ExtractPath(this->FileName));
+            this->IncludeFile(fileNameToken.ToString(), vtkFoamFile::ExtractPath(this->FileName));
           }
         }
         else if (directiveToken == "inputMode")
@@ -2588,70 +2653,6 @@ public:
     return true;
   }
 
-  void Open(const std::string& fileName)
-  {
-    // reset line number to indicate the beginning of the file when an
-    // exception is thrown
-    this->Superclass::LineNumber = 0;
-    this->Superclass::FileName = fileName;
-
-    if (this->Superclass::File)
-    {
-      this->ThrowStackTrace("File already opened within this object");
-    }
-
-    if ((this->Superclass::File = vtksys::SystemTools::Fopen(this->Superclass::FileName, "rb")) ==
-      nullptr)
-    {
-      this->ThrowStackTrace("Cannot open file for reading");
-    }
-
-    unsigned char zMagic[2];
-    if (fread(zMagic, 1, 2, this->Superclass::File) == 2 && zMagic[0] == 0x1f && zMagic[1] == 0x8b)
-    {
-      // gzip-compressed format
-      this->Superclass::Z.avail_in = 0;
-      this->Superclass::Z.next_in = Z_NULL;
-      // + 32 to automatically recognize gzip format
-      if (inflateInit2(&this->Superclass::Z, 15 + 32) == Z_OK)
-      {
-        this->Superclass::IsCompressed = true;
-        this->Superclass::Inbuf = new unsigned char[VTK_FOAMFILE_INBUFSIZE];
-      }
-      else
-      {
-        fclose(this->Superclass::File);
-        this->Superclass::File = nullptr;
-        throw this->StackString() << "Can't init zstream "
-                                  << (this->Superclass::Z.msg ? this->Superclass::Z.msg : "");
-      }
-    }
-    else
-    {
-      // uncompressed format
-      this->Superclass::IsCompressed = false;
-    }
-    rewind(this->Superclass::File);
-
-    this->Superclass::ZStatus = Z_OK;
-    this->Superclass::Outbuf = new unsigned char[VTK_FOAMFILE_OUTBUFSIZE + 1];
-    this->Superclass::BufPtr = this->Superclass::Outbuf + 1;
-    this->Superclass::BufEndPtr = this->Superclass::BufPtr;
-    this->Superclass::LineNumber = 1;
-  }
-
-  void Close()
-  {
-    while (this->CloseIncludedFile())
-      ;
-    this->Clear();
-
-    // Reinstate values from reader (eg, GUI)
-    auto& streamOpt = static_cast<vtkFoamStreamOption&>(*this);
-    streamOpt.SetLabel64(this->Reader->GetUse64BitLabels());
-    streamOpt.SetFloat64(this->Reader->GetUse64BitFloats());
-  }
-
   // fread or gzread with buffering handling
   vtkTypeInt64 Read(unsigned char* buf, const vtkTypeInt64 len)
   {
@@ -2723,16 +2724,18 @@ public:
 
   void ReadExpecting(const char* str)
   {
-    vtkFoamToken t;
-    if (!this->Read(t) || t != str)
+    vtkFoamToken tok;
+    if (!this->Read(tok) || tok != str)
     {
-      throw this->StackString() << "Expected string \"" << str << "\", found " << t;
+      throw this->StackString() << "Expected string \"" << str << "\", found " << tok;
     }
   }
 
-  vtkTypeInt64 ReadIntValue();
-  template <typename FloatType>
-  FloatType ReadFloatValue();
+  // ASCII read of longest integer
+  vtkTypeInt64 ReadIntegerValue();
+
+  // ASCII read of longest floating-point
+  double ReadDoubleValue();
 };
 
 int vtkFoamFile::ReadNext()
@@ -2746,7 +2749,7 @@ int vtkFoamFile::ReadNext()
 
 // specialized for reading an integer value.
 // not using the standard strtol() for speed reason.
-vtkTypeInt64 vtkFoamFile::ReadIntValue()
+vtkTypeInt64 vtkFoamFile::ReadIntegerValue()
 {
   // skip prepending invalid chars
   // expanded the outermost loop in nextTokenHead() for performance
@@ -2811,8 +2814,7 @@ vtkTypeInt64 vtkFoamFile::ReadIntValue()
 // extremely simplified high-performing string to floating point
 // conversion code based on
 // ParaView3/VTK/Utilities/vtksqlite/vtk_sqlite3.c
-template <typename FloatType>
-FloatType vtkFoamFile::ReadFloatValue()
+double vtkFoamFile::ReadDoubleValue()
 {
   // skip prepending invalid chars
   // expanded the outermost loop in nextTokenHead() for performance
@@ -2939,7 +2941,7 @@ FloatType vtkFoamFile::ReadFloatValue()
   }
   this->PutBack(c);
 
-  return static_cast<FloatType>(negNum ? -num : num);
+  return negNum ? -num : num;
 }
 
 void vtkFoamFile::ThrowStackTrace(const std::string& msg)
@@ -3142,6 +3144,7 @@ private:
   // Attempt to open file (or file.gz) and read header
   bool OpenFile(const std::string& file, bool checkGzip = false)
   {
+    this->ClearError(); // Discard any previous errors
     try
     {
       this->Superclass::Open(file);
@@ -3149,6 +3152,15 @@ private:
     }
     catch (const vtkFoamError& err)
     {
+      if (checkGzip)
+      {
+        // Avoid checking again if already ends_with(".gz")
+        const auto len = file.length();
+        if (len > 3 && file.compare(len - 3, std::string::npos, ".gz") == 0)
+        {
+          checkGzip = false;
+        }
+      }
       if (!checkGzip)
       {
         this->SetError(err);
@@ -3182,6 +3194,14 @@ private:
     return true;
   }
 
+  void CloseFile()
+  {
+    this->Superclass::Close();
+    this->objectName_.clear();
+    this->headerClassName_.clear();
+    this->error_.clear();
+  }
+
 public:
   // No generated methods
   vtkFoamIOobject() = delete;
@@ -3198,64 +3218,67 @@ public:
   ~vtkFoamIOobject() { this->Close(); }
 
   // Attempt to open file (without gzip fallback) and read FoamFile header
-  bool Open(const std::string& file) { return OpenFile(file); }
+  bool Open(const std::string& file) { return this->OpenFile(file, false); }
 
   // Attempt to open file (with gzip fallback) and read FoamFile header
-  bool OpenOrGzip(const std::string& file) { return OpenFile(file, true); }
+  bool OpenOrGzip(const std::string& file) { return this->OpenFile(file, true); }
 
-  void Close()
+  // Attempt to open file relative to the case, and read FoamFile header
+  bool OpenCaseFile(const std::string& file) { return this->OpenFile(this->GetCasePath() + file); }
+
+  // Attempt to open file (or file.gz) relative to the case, and read FoamFile header
+  bool OpenCaseFileOrGzip(const std::string& file)
   {
-    this->Superclass::Close();
-    this->objectName_.clear();
-    this->headerClassName_.clear();
-    this->error_.clear();
+    return this->OpenFile(this->GetCasePath() + file);
   }
 
+  void Close() { this->CloseFile(); }
+
   const std::string& GetClassName() const noexcept { return this->headerClassName_; }
   const std::string& GetObjectName() const noexcept { return this->objectName_; }
   const vtkFoamError& GetError() const noexcept { return this->error_; }
-  void SetError(const vtkFoamError& e) { this->error_ = e; }
+  void ClearError() noexcept { this->error_.clear(); }
   bool HasError() const noexcept { return !this->error_.empty(); }
+  void SetError(const vtkFoamError& err) { this->error_ = err; }
   bool GetLagrangianPositionsExtraData() const { return this->LagrangianPositionsExtraData_; }
 };
 
 //------------------------------------------------------------------------------
-// workarounding class for older compilers (gcc-3.3.x and possibly older)
+// ASCII read of primitive, with type casting
 template <typename T>
 struct vtkFoamReadValue
 {
-public:
   static T ReadValue(vtkFoamIOobject& io);
 };
 
 template <>
 inline vtkTypeInt8 vtkFoamReadValue<vtkTypeInt8>::ReadValue(vtkFoamIOobject& io)
 {
-  return static_cast<vtkTypeInt8>(io.ReadIntValue());
+  return static_cast<vtkTypeInt8>(io.ReadIntegerValue());
 }
 
 template <>
 inline vtkTypeInt32 vtkFoamReadValue<vtkTypeInt32>::ReadValue(vtkFoamIOobject& io)
 {
-  return static_cast<vtkTypeInt32>(io.ReadIntValue());
+  return static_cast<vtkTypeInt32>(io.ReadIntegerValue());
 }
 
 template <>
 inline vtkTypeInt64 vtkFoamReadValue<vtkTypeInt64>::ReadValue(vtkFoamIOobject& io)
 {
-  return io.ReadIntValue();
+  return io.ReadIntegerValue();
 }
 
 template <>
 inline float vtkFoamReadValue<float>::ReadValue(vtkFoamIOobject& io)
 {
-  return io.ReadFloatValue<float>();
+  return static_cast<float>(io.ReadDoubleValue());
 }
 
 template <>
 inline double vtkFoamReadValue<double>::ReadValue(vtkFoamIOobject& io)
 {
-  return io.ReadFloatValue<double>();
+  return io.ReadDoubleValue();
 }
 
 //------------------------------------------------------------------------------
@@ -3394,7 +3417,7 @@ public:
       io.ReadExpecting(')');
       if (isPositions)
       {
-        vtkFoamReadValue<vtkTypeInt64>::ReadValue(io); // Skip label celli
+        (void)io.ReadIntegerValue(); // Skip label celli
       }
 
       for (vtkIdType i = 0; i < nTuples; ++i)
@@ -3419,7 +3442,7 @@ public:
         io.ReadExpecting(')');
         if (isPositions)
         {
-          vtkFoamReadValue<vtkTypeInt64>::ReadValue(io); // Skip label celli
+          (void)io.ReadIntegerValue(); // Skip label celli
         }
       }
     }
@@ -3554,7 +3577,6 @@ public:
   // mixedRhoE B.C. in rhopSonicFoam/shockTube)
   void MakeLabelList(const vtkTypeInt64 labelValue, const vtkIdType size)
   {
-    assert("Label type not set!" && this->HasLabelType());
     this->Superclass::Type = LABELLIST;
     if (this->IsLabel64())
     {
@@ -4434,7 +4456,7 @@ void vtkFoamIOobject::ReadHeader()
   {
     throw vtkFoamError() << "No 'format' (ascii|binary) in FoamFile header";
   }
-  this->SetUseBinaryFormat("binary" == eptr->ToString()); // case sensitive
+  this->SetBinaryFormat("binary" == eptr->ToString()); // case sensitive
 
   // Newer files have 'arch' entry with "label=(32|64) scalar=(32|64)"
   // If this entry does not exist, or is incomplete, use the fallback values
@@ -4792,7 +4814,6 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
       }
       else if (currToken.IsLabel())
       {
-        assert("Label type not set!" && currToken.HasLabelType());
         if (currToken.IsLabel64())
         {
           assert(vtkTypeInt64Array::FastDownCast(this->LabelListPtr) != nullptr);
@@ -5123,12 +5144,13 @@ void vtkFoamEntry::Read(vtkFoamIOobject& io)
 // vtkOpenFOAMReaderPrivate constructor and destructor
 vtkOpenFOAMReaderPrivate::vtkOpenFOAMReaderPrivate()
 {
-  // DATA TIMES
-  this->TimeStep = 0;
-  this->TimeStepOld = -1;
+  // Time information
   this->TimeValues = vtkDoubleArray::New();
   this->TimeNames = vtkStringArray::New();
 
+  this->TimeStep = 0;
+  this->TimeStepOld = -1;
+
   // Selection
   this->InternalMeshSelectionStatus = 0;
   this->InternalMeshSelectionStatusOld = 0;
-- 
GitLab


From 3936653b3dcfd40dee67a13bfe0e7f760fff16c6 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 5 Feb 2021 14:53:07 +0100
Subject: [PATCH 16/36] openfoam: simplify handling of time changes and naming

- use indices into TimeNames/TimeValues to ensure full consistency
  with reduced storage.

- locate mesh-specific name "polyMesh" into the respective reading
  routine.

- when scanning time directories, do cheaper string operations before
  filestat. This eliminates unnecessary checks for items such as
  "processorNN/" which are not times anyhow.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 700 ++++++++++++++++--------------
 1 file changed, 376 insertions(+), 324 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 94d93d85606..e5e925d45aa 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -243,6 +243,12 @@ vtkStandardNewMacro(vtkOpenFOAMReader);
 // The name for finiteVolume internal mesh (unzoned)
 static constexpr const char* const NAME_INTERNALMESH = "internalMesh";
 
+// Index is "constant" time
+static constexpr int TIMEINDEX_CONSTANT = -1;
+
+// Index has not been visited
+static constexpr int TIMEINDEX_UNVISITED = -2;
+
 //------------------------------------------------------------------------------
 // Local Functions
 
@@ -765,10 +771,6 @@ struct vtkFoamBoundaries : public std::vector<vtkFoamPatch>
   // Active patch indices, selected by group
   std::unordered_set<vtkIdType> patchActiveByGroup;
 
-  // We maintain the corresponding face-instances time directory
-  // to ensure that topology or other changes are noticed
-  std::string timeName_;
-
   // Reset group and patch selections
   void clearSelections()
   {
@@ -952,10 +954,7 @@ public:
   vtkStringArray* GetTimeNames() { return this->TimeNames; }
   vtkDoubleArray* GetTimeValues() { return this->TimeValues; }
 
-  bool HasPolyMesh() const
-  {
-    return this->PolyMeshFacesDir && this->PolyMeshFacesDir->GetNumberOfValues();
-  }
+  bool HasPolyMesh() const noexcept { return !this->PolyMeshTimeIndexFaces.empty(); }
 
   const std::string& GetRegionName() const noexcept { return this->RegionName; }
 
@@ -963,11 +962,11 @@ public:
   int RequestData(vtkMultiBlockDataSet* output);
   int MakeMetaDataAtTimeStep(vtkStringArray*, vtkStringArray*, vtkStringArray*, bool);
 
-  // Gather time instances information and create mesh times
+  // Gather time instances information and create cache for mesh times
   bool MakeInformationVector(const std::string& casePath, const std::string& controlDictPath,
     const std::string& procName, vtkOpenFOAMReader* parent, bool requirePolyMesh = true);
 
-  // Copy time instances information and create mesh times
+  // Copy time instances information and create cache for mesh times
   void SetupInformation(const std::string& casePath, const std::string& regionName,
     const std::string& procName, vtkOpenFOAMReaderPrivate* master, bool requirePolyMesh = true);
 
@@ -981,9 +980,18 @@ private:
   // Time information
   vtkDoubleArray* TimeValues; // Time values
   vtkStringArray* TimeNames;  // Directory names
+
+  // Topology indices into TimeValues, TimeName
+  std::vector<vtkIdType> PolyMeshTimeIndexPoints;
+  std::vector<vtkIdType> PolyMeshTimeIndexFaces;
+
+  // Indices into TimeValues, TimeName
   int TimeStep;
   int TimeStepOld;
 
+  // Topology time index, driven by PolyMeshTimeIndexFaces
+  int TopologyTimeIndex;
+
   int InternalMeshSelectionStatus;
   int InternalMeshSelectionStatusOld;
 
@@ -993,8 +1001,6 @@ private:
   vtkStringArray* AreaFieldFiles;
   vtkStringArray* PointFieldFiles;
   vtkStringArray* LagrangianFieldFiles;
-  vtkStringArray* PolyMeshPointsDir;
-  vtkStringArray* PolyMeshFacesDir;
 
   // Mesh dimensions and construction information
   vtkIdType NumPoints;
@@ -1094,23 +1100,27 @@ private:
     }
     return this->CasePath + this->TimeNames->GetValue(timeIndex);
   }
+  std::string CurrentTimePath() const { return this->TimePath(this->TimeStep); }
+
+  // TimePath + region
   std::string TimeRegionPath(int timeIndex) const
   {
     return this->TimePath(timeIndex) + this->RegionPath();
   }
-  std::string CurrentTimePath() const { return this->TimePath(this->TimeStep); }
 
   std::string CurrentTimeRegionPath() const { return this->TimeRegionPath(this->TimeStep); }
-  std::string CurrentTimeRegionMeshPath(vtkStringArray* dir) const
+
+  std::string CurrentTimeRegionPath(const std::vector<vtkIdType>& indexer) const
   {
-    return this->CasePath + dir->GetValue(this->TimeStep) + this->RegionPath() + "/polyMesh/";
+    return this->TimeRegionPath(indexer[this->TimeStep]);
   }
 
-  // Append time directories for mesh
-  void AppendMeshDirToArray(vtkStringArray*, vtkIdType timeIndex, bool changed);
+#if VTK_FOAMFILE_DEBUG
+  void PrintMeshTimes(const char* name, const std::vector<vtkIdType>&) const; // For debugging
+#endif
 
   // Search time directories for mesh
-  void PopulatePolyMeshDirArrays();
+  void PopulateMeshTimeIndices();
 
   void AddFieldName(
     const std::string& fieldName, const std::string& fieldType, bool isLagrangian = false);
@@ -1120,19 +1130,19 @@ private:
   void LocateLagrangianClouds(const std::string& timePath);
 
   // List time directories according to system/controlDict
-  bool ListTimeDirectoriesByControlDict(const vtkFoamDict& dict);
+  vtkFoamError ListTimeDirectoriesByControlDict(const std::string& controlDictPath);
 
   // List time directories by searching in a case directory
   bool ListTimeDirectoriesByInstances();
 
   // Read polyMesh/points (vectorField)
-  vtkSmartPointer<vtkFloatArray> ReadPointsFile(const std::string& meshDir);
+  vtkSmartPointer<vtkFloatArray> ReadPointsFile(const std::string& timeRegionDir);
 
   // Read polyMesh/faces (faceCompactList or faceList)
-  std::unique_ptr<vtkFoamLabelListList> ReadFacesFile(const std::string& meshDir);
+  std::unique_ptr<vtkFoamLabelListList> ReadFacesFile(const std::string& timeRegionDir);
 
   // Read polyMesh/{owner,neighbour}, check overall number of faces.
-  bool ReadOwnerNeighbourFiles(const std::string& meshDir);
+  bool ReadOwnerNeighbourFiles(const std::string& timeRegionDir);
 
   // Create meshCells from owner/neighbour information
   std::unique_ptr<vtkFoamLabelListList> CreateCellFaces();
@@ -1180,8 +1190,8 @@ private:
   // Create lagrangian mesh/fields
   vtkMultiBlockDataSet* MakeLagrangianMesh();
 
-  // Read specified file (typeName)
-  std::unique_ptr<vtkFoamDict> GatherBlocks(const char* typeName, bool mandatory);
+  // Read specified file (typeName) from polyMesh directory, using faces instance
+  std::unique_ptr<vtkFoamDict> GetPolyMeshFile(const std::string& typeName, bool mandatory);
 
   // Create (cell|face|point) zones
   bool GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
@@ -5149,7 +5159,8 @@ vtkOpenFOAMReaderPrivate::vtkOpenFOAMReaderPrivate()
   this->TimeNames = vtkStringArray::New();
 
   this->TimeStep = 0;
-  this->TimeStepOld = -1;
+  this->TimeStepOld = TIMEINDEX_UNVISITED;
+  this->TopologyTimeIndex = TIMEINDEX_UNVISITED;
 
   // Selection
   this->InternalMeshSelectionStatus = 0;
@@ -5166,8 +5177,6 @@ vtkOpenFOAMReaderPrivate::vtkOpenFOAMReaderPrivate()
   this->AreaFieldFiles = vtkStringArray::New();
   this->PointFieldFiles = vtkStringArray::New();
   this->LagrangianFieldFiles = vtkStringArray::New();
-  this->PolyMeshPointsDir = vtkStringArray::New();
-  this->PolyMeshFacesDir = vtkStringArray::New();
 
   // For creating cell-to-point translated data
   this->BoundaryPointMap = nullptr;
@@ -5206,8 +5215,6 @@ vtkOpenFOAMReaderPrivate::~vtkOpenFOAMReaderPrivate()
   this->TimeValues->Delete();
   this->TimeNames->Delete();
 
-  this->PolyMeshPointsDir->Delete();
-  this->PolyMeshFacesDir->Delete();
   this->VolFieldFiles->Delete();
   this->DimFieldFiles->Delete();
   this->AreaFieldFiles->Delete();
@@ -5333,6 +5340,77 @@ void vtkOpenFOAMReaderPrivate::SetTimeValue(double requestedTime)
   }
 }
 
+//------------------------------------------------------------------------------
+// Gather the necessary information to create a path to the data
+bool vtkOpenFOAMReaderPrivate::MakeInformationVector(const std::string& casePath,
+  const std::string& controlDictPath, const std::string& procName, vtkOpenFOAMReader* parent,
+  bool requirePolyMesh)
+{
+  vtkFoamDebug(<< "MakeInformationVector (" << this->RegionName << "/" << procName
+               << ") polyMesh:" << requirePolyMesh << " - list times\n");
+
+  this->CasePath = casePath;
+  this->ProcessorName = procName;
+  this->Parent = parent;
+
+  bool scanTimeDirs = true;
+  bool listOk = true; // Tentative return value
+
+  // List timesteps by directory or predict from controlDict values
+
+  if (!controlDictPath.empty() && this->Parent->GetListTimeStepsByControlDict())
+  {
+    vtkFoamError errors = this->ListTimeDirectoriesByControlDict(controlDictPath);
+
+    listOk = errors.empty();
+    if (listOk)
+    {
+      scanTimeDirs = false;
+    }
+    else
+    {
+      // Fall through to list by directory
+      vtkWarningMacro(<< errors << " - listing by instance instead");
+    }
+  }
+
+  if (scanTimeDirs)
+  {
+    listOk = this->ListTimeDirectoriesByInstances();
+  }
+  if (!listOk)
+  {
+    return false;
+  }
+
+  // does not seem to be required even if number of timesteps reduced
+  // upon refresh since ParaView rewinds TimeStep to 0, but for precaution
+  const vtkIdType nTimes = this->TimeValues->GetNumberOfTuples();
+  if (nTimes)
+  {
+    if (this->TimeStep >= nTimes)
+    {
+      this->SetTimeStep(static_cast<int>(nTimes - 1));
+    }
+  }
+  else
+  {
+    this->SetTimeStep(0);
+  }
+
+  // Clear any cached knowledge
+  this->PolyMeshTimeIndexPoints.clear();
+  this->PolyMeshTimeIndexFaces.clear();
+
+  // Normally expect a (default region) polyMesh/, but not for multi-region cases
+  if (requirePolyMesh)
+  {
+    this->PopulateMeshTimeIndices();
+  }
+
+  return true;
+}
+
 //------------------------------------------------------------------------------
 // Copy time instances information and create mesh times
 void vtkOpenFOAMReaderPrivate::SetupInformation(const std::string& casePath,
@@ -5354,11 +5432,14 @@ void vtkOpenFOAMReaderPrivate::SetupInformation(const std::string& casePath,
   this->TimeNames = master->TimeNames;
   this->TimeNames->Register(nullptr);
 
-  // Normally will have already checked for a region polyMesh/ before calling this method,
-  // but provision for a missing mesh anyhow
+  // Clear any cached knowledge
+  this->PolyMeshTimeIndexPoints.clear();
+  this->PolyMeshTimeIndexFaces.clear();
+
+  // Normally expect a (default region) polyMesh/, but not for multi-region cases
   if (requirePolyMesh)
   {
-    this->PopulatePolyMeshDirArrays();
+    this->PopulateMeshTimeIndices();
   }
 }
 
@@ -5762,14 +5843,15 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
     return 1;
   }
 
+  // Track topology change
+  const bool topoChanged = (this->TopologyTimeIndex < -1 ||
+    (this->TopologyTimeIndex != this->PolyMeshTimeIndexFaces[this->TimeStep]));
+  this->TopologyTimeIndex = this->PolyMeshTimeIndexFaces[this->TimeStep];
+
   // Change in topology or selection, may need to update boundaries
   {
     auto& patches = this->BoundaryDict;
 
-    // Change in topology, need to create/recreate from file
-    const bool topoChanged = (patches.timeName_.empty() ||
-      (this->PolyMeshFacesDir->GetValue(this->TimeStep) != patches.timeName_));
-
     // User selection changed
     const bool selectChanged = topoChanged ||
       (this->Parent->PatchDataArraySelection->GetMTime() != this->Parent->PatchSelectionMTimeOld);
@@ -5780,10 +5862,8 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
     if (topoChanged)
     {
       patches.clearAll();
-      patches.timeName_ = this->PolyMeshFacesDir->GetValue(this->TimeStep);
-
       const bool isSubRegion = !this->RegionName.empty();
-      auto boundaryEntriesPtr(this->GatherBlocks("boundary", isSubRegion));
+      auto boundaryEntriesPtr(this->GetPolyMeshFile("boundary", isSubRegion));
 
       if (boundaryEntriesPtr)
       {
@@ -5888,6 +5968,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
 
   // Add scalars and vectors to metadata
   std::string timePath(this->CurrentTimePath());
+
   // do not do "RemoveAllArrays()" to accumulate array selections
   // this->CellDataArraySelection->RemoveAllArrays();
   this->VolFieldFiles->Initialize();
@@ -5930,59 +6011,103 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
 
 //------------------------------------------------------------------------------
 // List time directories according to system/controlDict
-bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDict& dict)
+
+vtkFoamError vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(
+  const std::string& controlDictPath)
 {
   // Note: use double (not float) to handle time values precisely
 
+  // Open and check if controlDict is readable
+  vtkFoamIOobject io(this->CasePath, this->Parent);
+
+  if (!io.Open(controlDictPath))
+  {
+    return vtkFoamError() << "Error opening " << io.GetFileName() << ": " << io.GetError();
+  }
+
+  vtkFoamDict dict;
+  if (!dict.Read(io))
+  {
+    return vtkFoamError() << "Error reading line " << io.GetLineNumber() << " of "
+                          << io.GetFileName() << ": " << io.GetError();
+  }
+
+  if (dict.GetType() != vtkFoamToken::DICTIONARY)
+  {
+    return vtkFoamError() << "The file " << io.GetFileName() << " is not a dictionary";
+  }
+
   const vtkFoamEntry* eptr;
 
+  // Calculate time step increment based on type of run
+  if ((eptr = dict.Lookup("writeControl")) == nullptr)
+  {
+    return vtkFoamError() << "No 'writeControl' in " << io.GetFileName();
+  }
+  const std::string writeControl(eptr->ToString());
+
+  // When (adjustTimeStep, writeControl) == (on, adjustableRunTime) or (off, timeStep)
+  // list by time instances in the case directory otherwise
+  // (different behaviour from paraFoam)
+
+  bool adjustTimeStep = false;
+  if ((eptr = dict.Lookup("adjustTimeStep")) != nullptr)
+  {
+    const std::string sw(eptr->ToString());
+
+    // Switch values for 'true' (cf. src/OpenFOAM/db/Switch/Switch.C)
+    adjustTimeStep = (sw == "on" || sw == "yes" || sw == "y" || sw == "true" || sw == "t");
+  }
+  if (adjustTimeStep)
+  {
+    if (writeControl.compare(0, 10, "adjustable") != 0)
+    {
+      // Require "adjustable" or "adjustableRunTime"
+      return vtkFoamError() << "Used adjustTimeStep, but writeControl was not adjustable: "
+                            << writeControl;
+    }
+  }
+  else if (writeControl != "timeStep")
+  {
+    return vtkFoamError() << "Use fixed time step, but writeControl was not 'timeStep': "
+                          << writeControl;
+  }
+
   if ((eptr = dict.Lookup("startTime")) == nullptr)
   {
-    vtkErrorMacro(<< "No 'startTime' in controlDict");
-    return false;
+    return vtkFoamError() << "No 'startTime' in controlDict";
   }
   const double startTime = eptr->ToDouble();
 
   if ((eptr = dict.Lookup("endTime")) == nullptr)
   {
-    vtkErrorMacro(<< "No 'endTime' in controlDict");
-    return false;
+    return vtkFoamError() << "No 'endTime' in controlDict";
   }
   const double endTime = eptr->ToDouble();
 
   if ((eptr = dict.Lookup("deltaT")) == nullptr)
   {
-    vtkErrorMacro(<< "No 'deltaT' in controlDict");
-    return false;
+    return vtkFoamError() << "No 'deltaT' in controlDict";
   }
   const double deltaT = eptr->ToDouble();
 
   if ((eptr = dict.Lookup("writeInterval")) == nullptr)
   {
-    vtkErrorMacro(<< "No 'writeInterval' in controlDict");
-    return false;
+    return vtkFoamError() << "No 'writeInterval' in controlDict";
   }
   const double writeInterval = eptr->ToDouble();
 
-  if ((eptr = dict.Lookup("timeFormat")) == nullptr)
+  // "timeFormat" is optional - default is "general"
+  std::string timeFormat("general");
+  if ((eptr = dict.Lookup("timeFormat")) != nullptr)
   {
-    vtkErrorMacro(<< "No 'timeFormat' in controlDict");
-    return false;
+    timeFormat = eptr->ToString();
   }
-  const std::string timeFormat(eptr->ToString());
 
   // Default timePrecision is 6
   const vtkTypeInt64 timePrecision =
     ((eptr = dict.Lookup("timePrecision")) != nullptr ? eptr->ToInt() : 6);
 
-  // Calculate time step increment based on type of run
-  if ((eptr = dict.Lookup("writeControl")) == nullptr)
-  {
-    vtkErrorMacro(<< "No 'writeControl' in controlDict");
-    return false;
-  }
-  const std::string writeControl(eptr->ToString());
-
   double timeStepIncrement = 1;
   if (writeControl == "timeStep")
   {
@@ -5994,20 +6119,11 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
   }
   else
   {
-    vtkErrorMacro(<< "Cannot determine time-step for writeControl: " << writeControl);
-    return false;
+    return vtkFoamError() << "Cannot determine time-step for writeControl: " << writeControl;
   }
 
-  // How many timesteps there should be
-  const double tempResult = (endTime - startTime) / timeStepIncrement;
-
-  // +0.5 to round up
-  const int tempNumTimeSteps = static_cast<int>(tempResult + 0.5) + 1;
-
-  // Make sure time step dir exists
-  vtkNew<vtkDirectory> testdir;
-  this->TimeValues->Initialize();
-  this->TimeNames->Initialize();
+  // How many timesteps there should be, rounded up
+  const int numTimeSteps = 1 + static_cast<int>((endTime - startTime) / timeStepIncrement + 0.5);
 
   // Determine time name based on Foam::Time::timeName()
   // cf. src/OpenFOAM/db/Time/Time.C
@@ -6015,7 +6131,7 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
 #ifdef _MSC_VER
   bool correctExponent = true;
 #endif
-  if (timeFormat == "general")
+  if (timeFormat == "general" || timeFormat.empty())
   {
     parser.setf(std::ios_base::fmtflags(0), std::ios_base::floatfield);
   }
@@ -6032,65 +6148,65 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
   }
   else
   {
-    vtkWarningMacro("Warning: unsupported time format. Assuming general.");
     parser.setf(std::ios_base::fmtflags(0), std::ios_base::floatfield);
   }
   parser.precision(timePrecision);
 
-  for (int i = 0; i < tempNumTimeSteps; i++)
+  this->TimeValues->Initialize();
+  this->TimeNames->Initialize();
+
+  for (int timeStepi = 0; timeStepi < numTimeSteps; ++timeStepi)
   {
     parser.str("");
-    const double tempStep = i * timeStepIncrement + startTime;
-    parser << tempStep; // stringstream doesn't require ends
+    const double timeValue = startTime + timeStepIncrement * timeStepi;
+    parser << timeValue;
+
+    std::string timeName(parser.str());
+
 #ifdef _MSC_VER
     // workaround for format difference in MSVC++:
     // remove an extra 0 from exponent
     if (correctExponent)
     {
-      std::string tempStr(parser.str());
-      const auto pos = tempStr.find('e');
-      if (pos != std::string::npos && tempStr.length() >= pos + 3 && tempStr[pos + 2] == '0')
+      const auto pos = timeName.find('e');
+      if (pos != std::string::npos && timeName.length() >= pos + 3 && timeName[pos + 2] == '0')
       {
-        tempStr.erase(pos + 2, 1);
-        parser.str(tempStr);
+        timeName.erase(pos + 2, 1);
       }
     }
 #endif
+
     // Add the time steps that actually exist to steps
     // allows the run to be stopped short of controlDict spec
     // allows for removal of timesteps
-    if (testdir->Open((this->CasePath + parser.str()).c_str()))
+    if (vtksys::SystemTools::FileIsDirectory(this->CasePath + timeName))
     {
-      this->TimeValues->InsertNextValue(tempStep);
-      this->TimeNames->InsertNextValue(parser.str());
+      this->TimeNames->InsertNextValue(timeName);
+      this->TimeValues->InsertNextValue(timeValue);
     }
     // necessary for reading the case/0 directory whatever the timeFormat is
     // based on Foam::Time::operator++() cf. src/OpenFOAM/db/Time/Time.C
-    else if ((fabs(tempStep) < 1.0e-14L) // 10*SMALL
-      && testdir->Open((this->CasePath + std::string("0")).c_str()))
+    else if ((fabs(timeValue) < 1.0e-14L) // 10*SMALL
+      && vtksys::SystemTools::FileIsDirectory(this->CasePath + "0"))
     {
-      this->TimeValues->InsertNextValue(tempStep);
-      this->TimeNames->InsertNextValue(std::string("0"));
+      this->TimeNames->InsertNextValue("0");
+      this->TimeValues->InsertNextValue(0);
     }
   }
 
-  this->TimeValues->Squeeze();
-  this->TimeNames->Squeeze();
-
-  if (this->TimeValues->GetNumberOfTuples() == 0)
+  // If there are no other times and "constant/" directory exists - treat as startTime
+  if (this->TimeValues->GetNumberOfTuples() == 0 &&
+    vtksys::SystemTools::FileIsDirectory(this->CasePath + "constant"))
   {
-    // set the number of timesteps to 1 if the constant subdirectory exists
-    if (testdir->Open((this->CasePath + "constant").c_str()))
-    {
-      parser.str("");
-      parser << startTime;
-      this->TimeValues->InsertNextValue(startTime);
-      this->TimeValues->Squeeze();
-      this->TimeNames->InsertNextValue(parser.str());
-      this->TimeNames->Squeeze();
-    }
+    parser.str("");
+    parser << startTime;
+    this->TimeNames->InsertNextValue(parser.str());
+    this->TimeValues->InsertNextValue(startTime);
   }
-  return true;
+
+  this->TimeValues->Squeeze();
+  this->TimeNames->Squeeze();
+  return vtkFoamError();
 }
 
 //------------------------------------------------------------------------------
@@ -6099,8 +6215,8 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByControlDict(const vtkFoamDic
 bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByInstances()
 {
   // Open the case directory
-  vtkNew<vtkDirectory> testdir;
-  if (!testdir->Open(this->CasePath.c_str()))
+  vtkNew<vtkDirectory> dir;
+  if (!dir->Open(this->CasePath.c_str()))
   {
     vtkErrorMacro(<< "Can't open directory " << this->CasePath);
     return false;
@@ -6108,58 +6224,66 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByInstances()
 
   const bool ignore0Dir = this->Parent->GetSkipZeroTime();
 
-  // search all the directories in the case directory and detect
-  // directories with names convertible to numbers
-  this->TimeValues->Initialize();
+  // Detect all directories in the case directory with names convertible to numbers
   this->TimeNames->Initialize();
-  const vtkIdType nFiles = testdir->GetNumberOfFiles();
+  this->TimeValues->Initialize();
+
+  const vtkIdType nFiles = dir->GetNumberOfFiles();
   for (vtkIdType filei = 0; filei < nFiles; ++filei)
   {
-    const std::string timeName = testdir->GetFile(filei);
-    bool isTimeDir = testdir->FileIsDirectory(timeName.c_str());
+    const char* timeName = dir->GetFile(filei);
+
+    // Perform string checks first (quick) before any filestat
+    // - expect numbers starting with a digit or [-+]
+    // - no numbers starting with '.', since they would be hidden files!
 
-    if (!isTimeDir || timeName == "." || timeName == ".." || (ignore0Dir && timeName == "0"))
+    // Optionally ignore "0/" directory
+    if (ignore0Dir && timeName[0] == '0' && timeName[1] == '\0')
     {
-      // Skip files, optionally ignore 0/ directory
       continue;
     }
 
-    // Check if the name is convertible to a number
-    for (size_t j = 0; j < timeName.length() && isTimeDir; ++j)
+    bool isNumber = (std::isdigit(timeName[0]) || timeName[0] == '+' || timeName[0] == '-');
+    for (const char* p = (timeName + 1); *p && isNumber; ++p)
     {
-      const char c = timeName[j];
-      isTimeDir = (isdigit(c) || c == '+' || c == '-' || c == '.' || c == 'e' || c == 'E');
-    }
-    if (!isTimeDir)
-    {
-      continue;
+      const char c = *p;
+      isNumber = (std::isdigit(c) || c == '+' || c == '-' || c == '.' || c == 'E' || c == 'e');
     }
 
-    // convert to a number
-    char* endptr;
-    double timeValue = strtod(timeName.c_str(), &endptr);
-    // check if the value really was converted to a number
-    if (timeValue == 0.0 && endptr == timeName.c_str())
+    if (isNumber)
     {
-      continue;
+      // Convert to a number
+      char* endptr = nullptr;
+      const double timeValue = std::strtod(timeName, &endptr);
+
+      // Check for good parse of entire string, and filestat that it is a directory
+      if (timeName != endptr && *endptr == '\0' && dir->FileIsDirectory(timeName))
+      {
+        this->TimeNames->InsertNextValue(timeName);
+        this->TimeValues->InsertNextValue(timeValue);
+      }
     }
+  }
 
-    // add to the instance list
-    this->TimeValues->InsertNextValue(timeValue);
-    this->TimeNames->InsertNextValue(timeName);
+  // If there are no other times, use "constant/" directory
+  if (this->TimeValues->GetNumberOfTuples() == 0 && dir->FileIsDirectory("constant"))
+  {
+    this->TimeNames->InsertNextValue("constant");
+    this->TimeValues->InsertNextValue(0);
   }
 
   this->TimeValues->Squeeze();
   this->TimeNames->Squeeze();
 
-  if (this->TimeValues->GetNumberOfTuples() > 1)
+  vtkIdType nTimes = this->TimeValues->GetNumberOfTuples();
+
+  if (nTimes > 1)
   {
-    // sort the detected time directories
+    // Sort the detected time directories
     vtkSortDataArray::Sort(this->TimeValues, this->TimeNames);
 
-    // if there are duplicated timeValues found, remove duplicates
-    // (e.g. "0" and "0.000")
-    for (vtkIdType timeI = 1; timeI < this->TimeValues->GetNumberOfTuples(); timeI++)
+    // Remove duplicate time values (e.g. "0" and "0.000")
+    for (vtkIdType timeI = 1; timeI < nTimes; ++timeI)
     {
       // compare by exact match
       if (this->TimeValues->GetValue(timeI - 1) == this->TimeValues->GetValue(timeI))
@@ -6170,181 +6294,103 @@ bool vtkOpenFOAMReaderPrivate::ListTimeDirectoriesByInstances()
                         << this->TimeNames->GetValue(timeI) << " will be ignored.");
         this->TimeValues->RemoveTuple(timeI);
         // vtkStringArray does not have RemoveTuple()
-        for (vtkIdType timeJ = timeI + 1; timeJ < this->TimeNames->GetNumberOfTuples(); timeJ++)
+        for (vtkIdType oldTimei = timeI + 1; oldTimei < nTimes; ++oldTimei)
         {
-          this->TimeNames->SetValue(timeJ - 1, this->TimeNames->GetValue(timeJ));
+          this->TimeNames->SetValue(oldTimei - 1, this->TimeNames->GetValue(oldTimei));
         }
-        this->TimeNames->Resize(this->TimeNames->GetNumberOfTuples() - 1);
+        --nTimes;
+        this->TimeNames->Resize(nTimes);
       }
     }
   }
 
-  if (this->TimeValues->GetNumberOfTuples() == 0)
-  {
-    // set the number of timesteps to 1 if the constant subdirectory exists
-    if (testdir->Open((this->CasePath + "constant").c_str()))
-    {
-      this->TimeValues->InsertNextValue(0.0);
-      this->TimeValues->Squeeze();
-      this->TimeNames->InsertNextValue("constant");
-      this->TimeNames->Squeeze();
-    }
-  }
-
   return true;
 }
 
 //------------------------------------------------------------------------------
-// Gather the necessary information to create a path to the data
-bool vtkOpenFOAMReaderPrivate::MakeInformationVector(const std::string& casePath,
-  const std::string& controlDictPath, const std::string& procName, vtkOpenFOAMReader* parent,
-  bool requirePolyMesh)
+// Print changes in mesh times (debugging only)
+#if VTK_FOAMFILE_DEBUG
+void vtkOpenFOAMReaderPrivate::PrintMeshTimes(
+  const char* name, const std::vector<vtkIdType>& indexer) const
 {
-  vtkFoamDebug(<< "MakeInformationVector (" << this->RegionName << "/" << procName
-               << ") polyMesh:" << requirePolyMesh << " - list times\n");
+  // Yes this is really needed, VTK constness is a bit odd
+  auto& timeNames = const_cast<vtkStringArray&>(*this->TimeNames);
 
-  this->CasePath = casePath;
-  this->ProcessorName = procName;
-  this->Parent = parent;
+  std::cerr << name << " times (";
 
-  bool ret = false; // Tentative return value
-
-  // List timesteps by directory or predict from controlDict values
-
-  int listByControlDict = this->Parent->GetListTimeStepsByControlDict();
-  if (listByControlDict)
+  vtkIdType prev = TIMEINDEX_UNVISITED;
+  for (const auto idx : indexer)
   {
-    vtkFoamIOobject io(this->CasePath, this->Parent);
-
-    // Open and check if controlDict is readable
-    if (!io.Open(controlDictPath))
-    {
-      vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
-      return false;
-    }
-
-    vtkFoamDict dict;
-    if (!dict.Read(io))
+    if (idx == TIMEINDEX_UNVISITED)
     {
-      vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
-                    << ": " << io.GetError());
-      return false;
-    }
-    if (dict.GetType() != vtkFoamToken::DICTIONARY)
-    {
-      vtkErrorMacro(<< "The file " << io.GetFileName() << " is not a dictionary");
-      return false;
-    }
-
-    const vtkFoamEntry* eptr;
-    if ((eptr = dict.Lookup("writeControl")) == nullptr)
-    {
-      vtkErrorMacro(<< "No 'writeControl' in " << io.GetFileName());
-      return false;
+      std::cerr << " .";
     }
-    const std::string writeControl(eptr->ToString());
-
-    // list time directories according to controlDict.
-    // When (adjustTimeStep, writeControl) == (on, adjustableRunTime) or (off, timeStep)
-    // list by time instances in the case directory otherwise
-    // (different behaviour from paraFoam)
-
-    bool adjustTimeStep = false;
-    if ((eptr = dict.Lookup("adjustTimeStep")) != nullptr)
-    {
-      const std::string sw(eptr->ToString());
-
-      // Switch values for 'true' (cf. src/OpenFOAM/db/Switch/Switch.C)
-      adjustTimeStep = (sw == "on" || sw == "yes" || sw == "y" || sw == "true" || sw == "t");
-    }
-
-    if (adjustTimeStep ? (writeControl == "adjustableRunTime") : (writeControl == "timeStep"))
-    {
-      ret = this->ListTimeDirectoriesByControlDict(dict);
-    }
-    else
+    else if (prev != idx)
     {
-      // Cannot list by controlDict, fall through to below
-      listByControlDict = false;
-    }
-  }
-
-  if (!listByControlDict)
-  {
-    ret = this->ListTimeDirectoriesByInstances();
-  }
-
-  if (!ret)
-  {
-    return ret;
-  }
-
-  // does not seem to be required even if number of timesteps reduced
-  // upon refresh since ParaView rewinds TimeStep to 0, but for precaution
-  if (this->TimeValues->GetNumberOfTuples() > 0)
-  {
-    if (this->TimeStep >= this->TimeValues->GetNumberOfTuples())
-    {
-      this->SetTimeStep(static_cast<int>(this->TimeValues->GetNumberOfTuples() - 1));
+      std::cerr << ' ';
+      if (idx < 0)
+      {
+        std::cerr << "constant";
+      }
+      else
+      {
+        std::cerr << timeNames.GetValue(idx);
+      }
     }
+    prev = idx;
   }
-  else
-  {
-    this->SetTimeStep(0);
-  }
-
-  // Normally expect a (default region) polyMesh/, but not for multi-region cases
-  if (requirePolyMesh)
-  {
-    this->PopulatePolyMeshDirArrays();
-  }
-  return ret;
+  std::cerr << " )\n";
 }
+#endif
 
 //------------------------------------------------------------------------------
-// Append time value for a mesh points/faces change
-void vtkOpenFOAMReaderPrivate::AppendMeshDirToArray(
-  vtkStringArray* instances, vtkIdType timeIndex, bool changed)
+// Local Function
+
+namespace
 {
-  if (changed)
-  {
-    // Changed, set to current time instance name
-    instances->SetValue(timeIndex, this->TimeNames->GetValue(timeIndex));
-  }
-  else if (timeIndex > 0)
-  {
-    // No change, set to previous time instance name
-    instances->SetValue(timeIndex, instances->GetValue(timeIndex - 1));
-  }
-  else
-  {
-    // No change for the first instance, set to "constant" time instance
-    instances->SetValue(timeIndex, "constant");
-  }
+
+// Update mesh instance for change
+// - Changed: set to current time index
+// - No change: set to previous time instance
+// - No change and first instance: it is "constant" time instance
+inline static void UpdateTimeInstance(std::vector<vtkIdType>& list, vtkIdType i, bool changed)
+{
+  list[i] = changed ? i : (i == 0) ? TIMEINDEX_CONSTANT : list[i - 1];
 }
 
+} // End anonymous namespace
+
 //------------------------------------------------------------------------------
 // create a Lookup Table containing the location of the points
 // and faces files for each time steps mesh
-void vtkOpenFOAMReaderPrivate::PopulatePolyMeshDirArrays()
+void vtkOpenFOAMReaderPrivate::PopulateMeshTimeIndices()
 {
-  // initialize size to number of timesteps
+  auto& faces = this->PolyMeshTimeIndexFaces;
+  auto& points = this->PolyMeshTimeIndexPoints;
+
+  // Ensure consistent sizing
   const vtkIdType nTimes = this->TimeValues->GetNumberOfTuples();
-  this->PolyMeshPointsDir->SetNumberOfValues(nTimes);
-  this->PolyMeshFacesDir->SetNumberOfValues(nTimes);
 
-  for (vtkIdType timei = 0; timei < nTimes; ++timei)
+  faces.resize(nTimes, TIMEINDEX_UNVISITED);
+  points.resize(nTimes, TIMEINDEX_UNVISITED);
+
+  for (vtkIdType timeIter = 0; timeIter < nTimes; ++timeIter)
   {
     // The mesh directory for this timestep
-    const std::string meshDir(this->TimeRegionPath(timei) + "/polyMesh/");
+    const std::string meshDir(this->TimeRegionPath(timeIter) + "/polyMesh/");
 
     const bool hasMeshDir = vtksys::SystemTools::FileIsDirectory(meshDir);
     const bool topoChanged = hasMeshDir && vtkFoamFile::IsFile(meshDir + "faces", true);
     const bool pointsMoved = hasMeshDir && vtkFoamFile::IsFile(meshDir + "points", true);
 
-    AppendMeshDirToArray(this->PolyMeshFacesDir, timei, topoChanged);
-    AppendMeshDirToArray(this->PolyMeshPointsDir, timei, pointsMoved);
+    UpdateTimeInstance(faces, timeIter, topoChanged);
+    UpdateTimeInstance(points, timeIter, pointsMoved);
   }
+
+#if VTK_FOAMFILE_DEBUG
+  PrintMeshTimes("faces", faces);
+  PrintMeshTimes("points", points);
+#endif
 }
 
 //------------------------------------------------------------------------------
@@ -6352,7 +6398,8 @@ void vtkOpenFOAMReaderPrivate::PopulatePolyMeshDirArrays()
 //
 // - sets NumPoints
 
-vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile(const std::string& meshDir)
+vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile(
+  const std::string& timeRegionDir)
 {
   // Assume failure
   this->NumPoints = 0;
@@ -6360,13 +6407,10 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile(const st
   vtkFoamIOobject io(this->CasePath, this->Parent);
 
   // Read polyMesh/points
+  if (!io.OpenOrGzip(timeRegionDir + "/polyMesh/points"))
   {
-    const std::string pointsPath(meshDir + "points");
-    if (!io.OpenOrGzip(pointsPath))
-    {
-      vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
-      return nullptr;
-    }
+    vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
+    return nullptr;
   }
 
   vtkSmartPointer<vtkFloatArray> pointArray;
@@ -6413,7 +6457,7 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile(const st
 // Return meshFaces
 
 std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadFacesFile(
-  const std::string& meshDir)
+  const std::string& timeRegionDir)
 {
   // Assume failure
   this->NumFaces = 0;
@@ -6422,15 +6466,12 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadFacesFile(
   vtkFoamIOobject io(this->CasePath, this->Parent);
 
   // Read polyMesh/faces
+  if (!io.OpenOrGzip(timeRegionDir + "/polyMesh/faces"))
   {
-    const std::string facePath(meshDir + "faces");
-    if (!io.OpenOrGzip(facePath))
-    {
-      vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError()
-                    << ". If you are trying to read a parallel decomposed case, "
-                       "set Case Type to Decomposed Case.");
-      return nullptr;
-    }
+    vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError()
+                  << ". If you are trying to read a parallel decomposed case, "
+                     "set Case Type to Decomposed Case.");
+    return nullptr;
   }
 
   std::unique_ptr<vtkFoamLabelListList> meshFaces;
@@ -6471,7 +6512,7 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::ReadFacesFile(
 // Read owner, neighbour files
 // - sets NumFaces and NumInternalFaces, and NumCells
 
-bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& meshDir)
+bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& timeRegionDir)
 {
   // Assume failure
   this->NumCells = 0;
@@ -6479,13 +6520,10 @@ bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& meshDi
   vtkFoamIOobject io(this->CasePath, this->Parent);
 
   // Read polyMesh/owner
+  if (!io.OpenOrGzip(timeRegionDir + "/polyMesh/owner"))
   {
-    const std::string ownPath(meshDir + "owner");
-    if (!io.OpenOrGzip(ownPath))
-    {
-      vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
-      return false;
-    }
+    vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
+    return false;
   }
   const bool use64BitLabels = io.IsLabel64();
 
@@ -6537,13 +6575,10 @@ bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& meshDi
   }
 
   // Read polyMesh/neighbour
+  if (!io.OpenOrGzip(timeRegionDir + "/polyMesh/neighbour"))
   {
-    const std::string neiPath(meshDir + "neighbour");
-    if (!io.OpenOrGzip(neiPath))
-    {
-      vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
-      return false;
-    }
+    vtkErrorMacro(<< "Error opening " << io.GetFileName() << ": " << io.GetError());
+    return false;
   }
 
   if (use64BitLabels != io.IsLabel64())
@@ -9418,14 +9453,15 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
 }
 
 //------------------------------------------------------------------------------
-// Returns a dictionary of block names for a specified domain
-std::unique_ptr<vtkFoamDict> vtkOpenFOAMReaderPrivate::GatherBlocks(
-  const char* typeName, bool mandatory)
+// Read specified file (typeName) from polyMesh directory as dictionary
+
+std::unique_ptr<vtkFoamDict> vtkOpenFOAMReaderPrivate::GetPolyMeshFile(
+  const std::string& typeName, bool mandatory)
 {
-  std::string blockPath(this->CurrentTimeRegionMeshPath(this->PolyMeshFacesDir) + typeName);
+  const std::string timeRegionDir(this->CurrentTimeRegionPath(this->PolyMeshTimeIndexFaces));
 
   vtkFoamIOobject io(this->CasePath, this->Parent);
-  if (!io.OpenOrGzip(blockPath))
+  if (!io.OpenOrGzip(timeRegionDir + "/polyMesh/" + typeName))
   {
     if (mandatory)
     {
@@ -9468,7 +9504,7 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
   zoneMap.clearAll(); // Remove all old ids and errors
 
-  auto zonesDictPtr(this->GatherBlocks(zoneFileName, false));
+  auto zonesDictPtr(this->GetPolyMeshFile(zoneFileName, false));
   if (zonesDictPtr == nullptr)
   {
     // Not an error if mesh zones are missing
@@ -9594,7 +9630,7 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
 
   zoneMap.clearAll(); // Remove all old ids and errors
 
-  auto zonesDictPtr(this->GatherBlocks(zoneFileName, false));
+  auto zonesDictPtr(this->GetPolyMeshFile(zoneFileName, false));
   if (zonesDictPtr == nullptr)
   {
     // Not an error if mesh zones are missing
@@ -9754,7 +9790,7 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
 
   zoneMap.clearAll(); // Remove all old ids and errors
 
-  auto zonesDictPtr(this->GatherBlocks(zoneFileName, false));
+  auto zonesDictPtr(this->GetPolyMeshFile(zoneFileName, false));
   if (zonesDictPtr == nullptr)
   {
     // Not an error if mesh zones are missing
@@ -9891,13 +9927,13 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     (this->Parent->Use64BitFloats != this->Parent->Use64BitFloatsOld);
 
   // Mesh changes
-  const bool topoChanged = (this->TimeStepOld == -1) || (this->FaceOwner == nullptr) ||
-    (this->PolyMeshFacesDir->GetValue(this->TimeStep) !=
-      this->PolyMeshFacesDir->GetValue(this->TimeStepOld));
+  const bool topoChanged = (this->TimeStepOld < 0) || (this->FaceOwner == nullptr) ||
+    (this->PolyMeshTimeIndexFaces[this->TimeStep] !=
+      this->PolyMeshTimeIndexFaces[this->TimeStepOld]);
 
-  const bool pointsMoved = (this->TimeStepOld == -1) ||
-    (this->PolyMeshPointsDir->GetValue(this->TimeStep) !=
-      this->PolyMeshPointsDir->GetValue(this->TimeStepOld));
+  const bool pointsMoved = (this->TimeStepOld < 0) ||
+    (this->PolyMeshTimeIndexPoints[this->TimeStep] !=
+      this->PolyMeshTimeIndexPoints[this->TimeStepOld]);
 
   // Internal mesh
   bool recreateInternalMesh = (changedStorageType) || (topoChanged) || (!this->Parent->CacheMesh) ||
@@ -9982,8 +10018,9 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
 
   if (createEulerians && (recreateInternalMesh || recreateBoundaryMesh))
   {
-    const std::string facesInstance = this->CurrentTimeRegionMeshPath(this->PolyMeshFacesDir);
+    const std::string facesInstance = this->CurrentTimeRegionPath(this->PolyMeshTimeIndexFaces);
 
+    vtkFoamDebug(<< "Read faces: " << facesInstance << "\n");
     // Read polyMesh/faces, create the list of faces, set the number of faces
     meshFaces = this->ReadFacesFile(facesInstance);
     if (!meshFaces)
@@ -9995,7 +10032,9 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
 
   if (createEulerians && recreateInternalMesh)
   {
-    const std::string facesInstance = this->CurrentTimeRegionMeshPath(this->PolyMeshFacesDir);
+    const std::string facesInstance = this->CurrentTimeRegionPath(this->PolyMeshTimeIndexFaces);
+
+    vtkFoamDebug(<< "Read owner/neighbour: " << facesInstance << "\n");
 
     // Read polyMesh/{owner,neighbour}, create FaceOwner/FaceNeigh
     if (!this->ReadOwnerNeighbourFiles(facesInstance))
@@ -10010,7 +10049,9 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
       (recreateBoundaryMesh && !recreateInternalMesh && this->InternalMesh == nullptr) ||
       moveInternalPoints || moveBoundaryPoints))
   {
-    const std::string pointsInstance = this->CurrentTimeRegionMeshPath(this->PolyMeshPointsDir);
+    const std::string pointsInstance = this->CurrentTimeRegionPath(this->PolyMeshTimeIndexPoints);
+
+    vtkFoamDebug(<< "Read points: " << pointsInstance << "\n");
 
     // Read polyMesh/points, set the number of faces
     pointArray = this->ReadPointsFile(pointsInstance);
@@ -10103,18 +10144,28 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   meshFaces.reset(nullptr);
 
   // Update the points in each mesh, if the point coordinates changed
+
+  // Update internal mesh first - decomposed polyhedra will modify pointArray
   if (createEulerians && moveInternalPoints)
   {
-    vtkSmartPointer<vtkPoints> tmpPoints; // Localized vtkPoints storage
-    vtkWeakPointer<vtkPoints> points;
-
-    // Update internal mesh first, since decomposed polyhedra will modify pointArray
     if (this->InternalMesh != nullptr)
     {
+      vtkFoamDebug("Move internal points\n");
       if (!this->MoveInternalMesh(this->InternalMesh, pointArray))
       {
-        return 0;
+        return 0; // Failed!
       }
+    }
+  }
+
+  // Update zones
+  if (createEulerians && moveInternalPoints)
+  {
+    vtkSmartPointer<vtkPoints> tmpPoints; // Localized vtkPoints storage
+    vtkWeakPointer<vtkPoints> points;
+
+    if (this->InternalMesh != nullptr)
+    {
       points = this->InternalMesh->GetPoints();
     }
     else
@@ -10155,6 +10206,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   {
     if (this->BoundaryMesh != nullptr)
     {
+      vtkFoamDebug("Move boundary points\n");
       this->MoveBoundaryMesh(this->BoundaryMesh, pointArray);
     }
   }
@@ -10303,7 +10355,7 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
   else
   {
     this->ClearMeshes();
-    this->TimeStepOld = -1;
+    this->TimeStepOld = TIMEINDEX_UNVISITED;
   }
   this->InternalMeshSelectionStatusOld = this->InternalMeshSelectionStatus;
 
-- 
GitLab


From eef280136e188e0615654f55752108fe312e7468 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 5 Feb 2021 16:37:51 +0100
Subject: [PATCH 17/36] openfoam: added support for finiteArea results

- this adds initial support for finite-area.
  Can be enabled as a compile-time option.

  Will be fully integrated after the selection mechanism has been
  reworked.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 258 +++++++++++++++++++++++++++++-
 1 file changed, 254 insertions(+), 4 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index e5e925d45aa..67adf239fc1 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -137,6 +137,9 @@
 // This could also be made part of the GUI properties
 #define VTK_FOAMFILE_IGNORE_FIELD_RESTART 0
 
+// Support for finiteArea
+#define VTK_FOAMFILE_FINITE_AREA 0
+
 // Support extra decomposition of polyhedral cells
 #define VTK_FOAMFILE_DECOMPOSE_POLYHEDRA 1
 
@@ -237,8 +240,10 @@ uLong ZEXPORT crc32(uLong, const Bytef*, uInt)
 
 vtkStandardNewMacro(vtkOpenFOAMReader);
 
+#if VTK_FOAMFILE_FINITE_AREA
 // The name for finiteArea mesh
-// pending: static constexpr const char* const NAME_AREAMESH = "areaMesh";
+static constexpr const char* const NAME_AREAMESH = "areaMesh";
+#endif
 
 // The name for finiteVolume internal mesh (unzoned)
 static constexpr const char* const NAME_INTERNALMESH = "internalMesh";
@@ -1040,6 +1045,11 @@ private:
   vtkFoamLabelArrayVector* AdditionalCellPoints;
 #endif
 
+#if VTK_FOAMFILE_FINITE_AREA
+  vtkFoamZones areaMeshMap;
+  vtkPolyData* AreaMesh;
+#endif
+
   // Constructor and destructor are kept private
   vtkOpenFOAMReaderPrivate();
   ~vtkOpenFOAMReaderPrivate() override;
@@ -1051,6 +1061,7 @@ private:
   void ClearInternalMeshes();
   void ClearBoundaryMeshes();
   void ClearZoneMeshes();
+  void ClearAreaMeshes();
   void ClearMeshes();
 
   // The subdirectory for a region. Eg, "/solid". Empty for default region.
@@ -1184,9 +1195,12 @@ private:
   vtkSmartPointer<vtkFloatArray> FillField(vtkFoamEntry& entry, vtkIdType nElements,
     const vtkFoamIOobject& io, vtkFoamTypes::dataType fieldDataType);
   void GetVolFieldAtTimeStep(const std::string& varName, bool isInternalField = false);
-  // void GetAreaFieldAtTimeStep(const std::string& varName);
   void GetPointFieldAtTimeStep(const std::string& varName);
 
+#if VTK_FOAMFILE_FINITE_AREA
+  void GetAreaFieldAtTimeStep(const std::string& varName);
+#endif
+
   // Create lagrangian mesh/fields
   vtkMultiBlockDataSet* MakeLagrangianMesh();
 
@@ -1200,6 +1214,11 @@ private:
   bool GetFaceZoneMesh(
     vtkMultiBlockDataSet* zoneMesh, const vtkFoamLabelListList& meshFaces, vtkPoints*);
   bool GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh, vtkPoints*);
+
+#if VTK_FOAMFILE_FINITE_AREA
+  // Mechanism for finiteArea mesh is similar to faceZone
+  bool GetAreaMesh(vtkPolyData* areaMesh, const vtkFoamLabelListList& meshFaces, vtkPoints*);
+#endif
 };
 
 vtkStandardNewMacro(vtkOpenFOAMReaderPrivate);
@@ -5207,6 +5226,11 @@ vtkOpenFOAMReaderPrivate::vtkOpenFOAMReaderPrivate()
   this->AdditionalCellPoints = nullptr;
 #endif
 
+#if VTK_FOAMFILE_FINITE_AREA
+  this->areaMeshMap.reset(vtkFoamZones::FACE);
+  this->AreaMesh = nullptr;
+#endif
+
   this->Parent = nullptr;
 }
 
@@ -5284,6 +5308,18 @@ void vtkOpenFOAMReaderPrivate::ClearZoneMeshes()
   }
 }
 
+void vtkOpenFOAMReaderPrivate::ClearAreaMeshes()
+{
+#if VTK_FOAMFILE_FINITE_AREA
+  this->areaMeshMap.clearAll();
+  if (this->AreaMesh != nullptr)
+  {
+    this->AreaMesh->Delete();
+    this->AreaMesh = nullptr;
+  }
+#endif
+}
+
 void vtkOpenFOAMReaderPrivate::ClearBoundaryMeshes()
 {
   if (this->BoundaryMesh != nullptr)
@@ -5317,6 +5353,7 @@ void vtkOpenFOAMReaderPrivate::ClearMeshes()
   this->ClearInternalMeshes();
   this->ClearBoundaryMeshes();
   this->ClearZoneMeshes();
+  this->ClearAreaMeshes();
 }
 
 void vtkOpenFOAMReaderPrivate::SetTimeValue(double requestedTime)
@@ -6002,7 +6039,9 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
   // sort array names. volFields first, followed by internal fields
   this->SortFieldFiles(cellSelectionNames, this->VolFieldFiles);
   this->SortFieldFiles(cellSelectionNames, this->DimFieldFiles);
-  // pending: this->SortFieldFiles(cellSelectionNames, this->AreaFieldFiles);
+#if VTK_FOAMFILE_FINITE_AREA
+  this->SortFieldFiles(cellSelectionNames, this->AreaFieldFiles);
+#endif
   this->SortFieldFiles(pointSelectionNames, this->PointFieldFiles);
   this->SortFieldFiles(lagrangianSelectionNames, this->LagrangianFieldFiles);
 
@@ -9302,6 +9341,85 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
   // ...
 }
 
+//------------------------------------------------------------------------------
+// Read area field at a timestep
+#if VTK_FOAMFILE_FINITE_AREA
+void vtkOpenFOAMReaderPrivate::GetAreaFieldAtTimeStep(const std::string& varName)
+{
+  // Where to map data
+  vtkPolyData* areaMesh = this->AreaMesh;
+
+  // Really simple, skip if not selected, or no areaMesh
+  const vtkIdType nFaces = (areaMesh ? areaMesh->GetNumberOfCells() : 0);
+
+  if (!nFaces)
+  {
+    return;
+  }
+
+  vtkFoamIOobject io(this->CasePath, this->Parent);
+  vtkFoamDict dict;
+  if (!this->ReadFieldFile(io, dict, varName, this->Parent->CellDataArraySelection))
+  {
+    return;
+  }
+
+  if (io.GetClassName().compare(0, 4, "area") != 0)
+  {
+    vtkErrorMacro(<< io.GetFileName() << " is not a areaField");
+    return;
+  }
+
+  // Eg, from "areaScalarField" -> SCALAR_TYPE
+  const auto fieldDataType(vtkFoamTypes::FieldToEnum(io.GetClassName(), 4));
+
+  // -------------------------
+  // Handle dictionary lookups first
+
+  // The "dimensions" entry - stringify
+  const std::string dimString(this->ConstructDimensions(dict));
+
+  // The "internalField" entry
+  vtkFoamEntry* ifieldEntry = nullptr;
+  {
+    ifieldEntry = dict.Lookup("internalField");
+    if (ifieldEntry == nullptr)
+    {
+      vtkErrorMacro(<< "internalField not found in " << io.GetFileName());
+      return;
+    }
+    else if (ifieldEntry->FirstValue().GetType() == vtkFoamToken::EMPTYLIST)
+    {
+      if (this->NumFaces)
+      {
+        vtkErrorMacro(<< "internalField of " << io.GetFileName() << " is empty");
+      }
+      return;
+    }
+  }
+
+  // Forget "boundaryField" entry
+  // - don't really handle edge constraints,
+
+  // -------------------------
+
+  // Generate internal field data
+  vtkSmartPointer<vtkFloatArray> iData = this->FillField(*ifieldEntry, nFaces, io, fieldDataType);
+  if (iData == nullptr)
+  {
+    return;
+  }
+  else if (iData->GetSize() == 0)
+  {
+    // Determined that there are no faces. Ignore the field
+    return;
+  }
+
+  // Set data to area mesh
+  ::AddArrayToFieldData(areaMesh->GetCellData(), iData, io.GetObjectName(), dimString);
+}
+#endif
+
 //------------------------------------------------------------------------------
 vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
 {
@@ -9907,6 +10025,108 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
   return true;
 }
 
+//------------------------------------------------------------------------------
+// Populate face zone(s) mesh
+
+#if VTK_FOAMFILE_FINITE_AREA
+bool vtkOpenFOAMReaderPrivate::GetAreaMesh(
+  vtkPolyData* areaMesh, const vtkFoamLabelListList& meshFaces, vtkPoints* points)
+{
+  // Tie to faces instance (like zones etc)
+  const std::string timeRegionDir(this->CurrentTimeRegionPath(*this->PolyMeshTimeIndexFaces));
+
+  auto& zoneMap = this->areaMeshMap;
+  zoneMap.clearAll(); // Remove all old ids and errors
+
+  vtkFoamIOobject io(this->CasePath, this->Parent);
+
+  // Read faMesh/faceLabels
+  if (!io.OpenOrGzip(timeRegionDir + "/faMesh/faceLabels"))
+  {
+    // Not an error if missing
+    return true;
+  }
+  const bool use64BitLabels = io.IsLabel64();
+
+  vtkSmartPointer<vtkDataArray> labelArray;
+
+  {
+    vtkFoamEntryValue dict(nullptr);
+    dict.SetStreamOption(io);
+    try
+    {
+      if (use64BitLabels)
+      {
+        dict.ReadNonUniformList<vtkFoamToken::LABELLIST,
+          vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+      }
+      else
+      {
+        dict.ReadNonUniformList<vtkFoamToken::LABELLIST,
+          vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+      }
+
+      // Capture content as smart pointer
+      labelArray.TakeReference(dict.ReleasePtr<vtkDataArray>());
+    }
+    catch (const vtkFoamError& err)
+    {
+      vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
+                    << ": " << err);
+      return false;
+    }
+    io.Close();
+  }
+
+  if (labelArray)
+  {
+    vtkDataArray& labels = *labelArray;
+    const vtkIdType nLabels = labels.GetNumberOfTuples();
+
+    // Transcribe into vtkIdList. Don't check for questionable entries just yet
+    auto elemIds = vtkSmartPointer<vtkIdList>::New();
+    elemIds->SetNumberOfIds(nLabels);
+
+    // Size for per-face scratch array
+    vtkIdType maxNFacePoints = 16;
+
+    for (vtkIdType idx = 0; idx < nLabels; ++idx)
+    {
+      const vtkTypeInt64 elemId = GetLabelValue(labelArray, idx, use64BitLabels);
+
+      const vtkIdType nFacePoints = meshFaces.GetSize(elemId);
+      if (maxNFacePoints < nFacePoints)
+      {
+        maxNFacePoints = nFacePoints;
+      }
+
+      elemIds->SetId(idx, elemId);
+    }
+
+    zoneMap.zones_[NAME_AREAMESH] = elemIds;
+
+    // Per-face scratch array
+    auto facePointsVtkId = vtkSmartPointer<vtkIdList>::New();
+    facePointsVtkId->SetNumberOfIds(maxNFacePoints);
+
+    // Allocate new grid: we do not use resize() beforehand since it
+    // could lead to undefined pointer if we return by error
+
+    areaMesh->AllocateEstimate(nLabels, 1);
+
+    // Insert faces
+    this->InsertFacesToGrid(
+      areaMesh, meshFaces, 0, nLabels, nullptr, facePointsVtkId, elemIds, false);
+
+    // Set points for zone
+    areaMesh->SetPoints(points);
+
+    return true;
+  }
+  return false;
+}
+#endif
+
 //------------------------------------------------------------------------------
 // return 0 if there's any error, 1 if success
 int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
@@ -10117,6 +10337,17 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
       this->PointZoneMesh->Delete();
       this->PointZoneMesh = nullptr;
     }
+
+#if VTK_FOAMFILE_FINITE_AREA
+    // Needs a proper selection mechanism
+    this->AreaMesh = vtkPolyData::New();
+    if (!this->GetAreaMesh(this->AreaMesh, *meshFaces, points))
+    {
+      this->areaMeshMap.clearAll();
+      this->AreaMesh->Delete();
+      this->AreaMesh = nullptr;
+    }
+#endif
   }
 
   // Don't need meshCells beyond here
@@ -10276,9 +10507,13 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
 
     // read field data variables into Internal/Boundary meshes
     vtkIdType nFieldsRead = 0;
-    const vtkIdType nFieldsToRead = (this->VolFieldFiles->GetNumberOfValues() +
+    vtkIdType nFieldsToRead = (this->VolFieldFiles->GetNumberOfValues() +
       this->DimFieldFiles->GetNumberOfValues() + this->PointFieldFiles->GetNumberOfValues());
 
+#if VTK_FOAMFILE_FINITE_AREA
+    nFieldsToRead += this->AreaFieldFiles->GetNumberOfValues();
+#endif
+
     for (vtkIdType i = 0; i < this->VolFieldFiles->GetNumberOfValues(); ++i)
     {
       this->GetVolFieldAtTimeStep(this->VolFieldFiles->GetValue(i));
@@ -10294,6 +10529,13 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
       this->GetPointFieldAtTimeStep(this->PointFieldFiles->GetValue(i));
       this->Parent->UpdateProgress(0.5 + (0.5 * ++nFieldsRead) / nFieldsToRead);
     }
+#if VTK_FOAMFILE_FINITE_AREA
+    for (vtkIdType i = 0; i < this->AreaFieldFiles->GetNumberOfValues(); ++i)
+    {
+      this->GetAreaFieldAtTimeStep(this->AreaFieldFiles->GetValue(i));
+      this->Parent->UpdateProgress(0.5 + (0.5 * ++nFieldsRead) / nFieldsToRead);
+    }
+#endif
   }
 
   // Read lagrangian mesh and fields
@@ -10315,6 +10557,14 @@ int vtkOpenFOAMReaderPrivate::RequestData(vtkMultiBlockDataSet* output)
     ::AppendBlock(output, this->BoundaryMesh, "boundary");
   }
 
+#if VTK_FOAMFILE_FINITE_AREA
+  // Set finiteArea mesh/data as output
+  if (this->AreaMesh != nullptr)
+  {
+    ::AppendBlock(output, this->AreaMesh, NAME_AREAMESH);
+  }
+#endif
+
   // Set lagrangian mesh as output
   if (lagrangianMesh != nullptr)
   {
-- 
GitLab


From 40e899d995cd9f23f1ffeddddd5a8bd39e6225e5 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 19 Feb 2021 14:35:28 +0100
Subject: [PATCH 18/36] BUG: openfoam reader ignores point patch value fields
 (fixes #18125)

- pointPatches may or may not have a "value" type.
  Use the patch value field where possible and the internal field
  otherwise. Previously always used the internal field.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 61 ++++++++++++++++++++++++++++---
 1 file changed, 56 insertions(+), 5 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 67adf239fc1..fb2138c944d 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -9318,16 +9318,67 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
   {
     if (patches.isActive(patch.index_))
     {
-      vtkNew<vtkFloatArray> vData;
       vtkDataArray* bpMap = this->BoundaryPointMap->operator[](activeBoundaryIndex);
       const vtkIdType nPoints = bpMap->GetNumberOfTuples();
       const bool meshPoints64Bit = ::Is64BitArray(bpMap);
 
-      vData->SetNumberOfComponents(nComponents);
-      vData->SetNumberOfTuples(nPoints);
-      for (vtkIdType pointi = 0; pointi < nPoints; ++pointi)
+      vtkSmartPointer<vtkFloatArray> vData;
+      std::string bcType;
+
+      if (bfieldEntries != nullptr)
       {
-        vData->SetTuple(pointi, GetLabelValue(bpMap, pointi, meshPoints64Bit), iData);
+        const vtkFoamEntry* bfieldEntry = bfieldEntries->Dictionary().Lookup(patch.name_, true);
+        if (bfieldEntry == nullptr)
+        {
+          // badEntry - but be silent about it
+        }
+        else if (bfieldEntry->FirstValue().GetType() != vtkFoamToken::DICTIONARY)
+        {
+          // badEntry - but be silent about it
+        }
+        else
+        {
+          const vtkFoamDict& patchDict = bfieldEntry->Dictionary();
+
+          // Look for "value" entry
+          vtkFoamEntry* vEntry = patchDict.Lookup("value");
+          if (vEntry == nullptr)
+          {
+            // For alternative fallback
+            const vtkFoamEntry* eptr = patchDict.Lookup("type");
+            if (eptr != nullptr)
+            {
+              bcType = eptr->ToString();
+            }
+          }
+          else
+          {
+            vData = this->FillField(*vEntry, nPoints, io, fieldDataType);
+            // silent about bad entry
+          }
+        }
+      }
+
+      if (vData == nullptr)
+      {
+        // No "value" entry
+        // Default to patch-internal values as boundary values
+        vData = vtkSmartPointer<vtkFloatArray>::New();
+        vData->SetNumberOfComponents(nComponents);
+        vData->SetNumberOfTuples(nPoints);
+
+        // Ad hoc handling of some known bcs without a "value"
+        if (bcType == "noSlip")
+        {
+          vData->FillValue(0);
+        }
+        else
+        {
+          for (vtkIdType pointi = 0; pointi < nPoints; ++pointi)
+          {
+            vData->SetTuple(pointi, GetLabelValue(bpMap, pointi, meshPoints64Bit), iData);
+          }
+        }
       }
 
       auto* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
-- 
GitLab


From c5381bf905b11b5930f3d3acd4972bdc6355d5f7 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Mon, 1 Mar 2021 18:40:43 +0100
Subject: [PATCH 19/36] DOC: update release notes for OpenFOAM reader

---
 .../release/dev/OpenFOAMReader-updates.md     | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/Documentation/release/dev/OpenFOAMReader-updates.md b/Documentation/release/dev/OpenFOAMReader-updates.md
index 86f56eecb0b..4a4bd676697 100644
--- a/Documentation/release/dev/OpenFOAMReader-updates.md
+++ b/Documentation/release/dev/OpenFOAMReader-updates.md
@@ -29,3 +29,32 @@
 
 - respect the boundary "inGroups" entry for selection of multiple
   boundary patches by group.
+
+
+2021-03-01
+
+# OpenFOAM bugfixes / improvements
+
+- support floating-point dimensions entries (fixes #18103)
+
+- respect point patch value fields (fixes #18125)
+
+- properly handle empty zones
+
+- improve zone addressing and handling. Basic support for face zones
+
+- reduced disk IO when setting up cases,
+  when scanning time directories, do cheaper string operations before
+  filestat.
+  This eliminates unnecessary checks for items that cannot be times anyhow.
+
+- avoid lagrangian and region name ambiguity.
+
+  Now prefix all non-default regions as "/regionName/...".
+  The default region has now prefix. This eliminates any
+  possible ambiguity if we happen to have slightly odd
+  region names like "patch", "lagrangian", "internalMesh", ...
+
+  - Drop old OpenFOAM 1.3 cloud naming.
+    These were simply dumped into the time directory without any region
+    qualifications. Defunct since about 2007.
-- 
GitLab


From 8843654f5f839fa420f09c0eecd1d3c68034dc44 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 12 Mar 2021 11:19:22 +0100
Subject: [PATCH 20/36] openfoam: use localized scratch array for face point
 ids

- reduces clutter and simplifies code
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 118 +++++++++---------------------
 1 file changed, 33 insertions(+), 85 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index fb2138c944d..646e30cba2a 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -1173,7 +1173,8 @@ private:
     const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
 
   void InsertFacesToGrid(vtkPolyData*, const vtkFoamLabelListList& meshFaces, vtkIdType startFace,
-    vtkIdType endFace, vtkDataArray*, vtkIdList*, vtkIdList* faceLabels, bool isLookupValue);
+    vtkIdType endFace, vtkIdList* faceLabels = nullptr, vtkDataArray* pointMap = nullptr,
+    bool isLookupValue = false);
 
   vtkMultiBlockDataSet* MakeBoundaryMesh(
     const vtkFoamLabelListList& meshFaces, vtkFloatArray* pointArray);
@@ -7789,17 +7790,19 @@ vtkUnstructuredGrid* vtkOpenFOAMReaderPrivate::MakeInternalMesh(
 }
 
 //------------------------------------------------------------------------------
-// insert faces to grid
+// Insert faces to grid
 void vtkOpenFOAMReaderPrivate::InsertFacesToGrid(vtkPolyData* boundaryMesh,
   const vtkFoamLabelListList& meshFaces, vtkIdType startFace, vtkIdType endFace,
-  vtkDataArray* boundaryPointMap, vtkIdList* facePointsVtkId, vtkIdList* faceLabels,
-  bool isLookupValue)
+  vtkIdList* faceLabels, vtkDataArray* pointMap, bool isLookupValue)
 {
   vtkPolyData& bm = *boundaryMesh;
 
   // Limits
   const vtkIdType maxLabels = this->FaceOwner->GetNumberOfTuples(); // NumFaces
 
+  // A per-face scratch array for vtkIdType ids.
+  vtkFoamStackVector<vtkIdType, 64> facePointIds;
+
   for (vtkIdType facei = startFace; facei < endFace; ++facei)
   {
     vtkIdType faceId = facei;
@@ -7814,52 +7817,38 @@ void vtkOpenFOAMReaderPrivate::InsertFacesToGrid(vtkPolyData* boundaryMesh,
       }
     }
 
-    const vtkIdType nFacePoints = meshFaces.GetSize(faceId);
+    const int nFacePoints = static_cast<int>(meshFaces.GetSize(faceId));
+    facePointIds.resize(nFacePoints);
 
     if (isLookupValue)
     {
-      for (vtkIdType fp = 0; fp < nFacePoints; ++fp)
+      for (int fp = 0; fp < nFacePoints; ++fp)
       {
-        const auto pointId = static_cast<vtkIdType>(meshFaces.GetValue(faceId, fp));
-        facePointsVtkId->SetId(fp, boundaryPointMap->LookupValue(pointId));
+        const auto meshPointi = static_cast<vtkIdType>(meshFaces.GetValue(faceId, fp));
+        facePointIds[fp] = pointMap->LookupValue(meshPointi);
       }
     }
-    else
+    else if (pointMap)
     {
-      if (boundaryPointMap)
-      {
-        const bool bpMap64Bit = ::Is64BitArray(boundaryPointMap); // null-safe
-        for (vtkIdType fp = 0; fp < nFacePoints; ++fp)
-        {
-          const auto pointId = static_cast<vtkIdType>(meshFaces.GetValue(faceId, fp));
-          facePointsVtkId->SetId(fp, GetLabelValue(boundaryPointMap, pointId, bpMap64Bit));
-        }
-      }
-      else
+      const bool pointMap64Bit = ::Is64BitArray(pointMap); // null-safe
+      for (int fp = 0; fp < nFacePoints; ++fp)
       {
-        for (vtkIdType fp = 0; fp < nFacePoints; ++fp)
-        {
-          const auto pointId = static_cast<vtkIdType>(meshFaces.GetValue(faceId, fp));
-          facePointsVtkId->SetId(fp, pointId);
-        }
+        const auto meshPointi = static_cast<vtkIdType>(meshFaces.GetValue(faceId, fp));
+        facePointIds[fp] = GetLabelValue(pointMap, meshPointi, pointMap64Bit);
       }
     }
-
-    if (nFacePoints == 3)
-    {
-      // Triangle
-      bm.InsertNextCell(VTK_TRIANGLE, 3, facePointsVtkId->GetPointer(0));
-    }
-    else if (nFacePoints == 4)
-    {
-      // Quad
-      bm.InsertNextCell(VTK_QUAD, 4, facePointsVtkId->GetPointer(0));
-    }
     else
     {
-      // Polygon
-      bm.InsertNextCell(VTK_POLYGON, static_cast<int>(nFacePoints), facePointsVtkId->GetPointer(0));
+      for (int fp = 0; fp < nFacePoints; ++fp)
+      {
+        const auto meshPointi = static_cast<vtkIdType>(meshFaces.GetValue(faceId, fp));
+        facePointIds[fp] = meshPointi;
+      }
     }
+
+    const int vtkFaceType =
+      (nFacePoints == 3 ? VTK_TRIANGLE : nFacePoints == 4 ? VTK_QUAD : VTK_POLYGON);
+    bm.InsertNextCell(vtkFaceType, nFacePoints, facePointIds.data());
   }
 }
 
@@ -7894,9 +7883,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
   vtkNew<vtkIdTypeArray> nBoundaryPointsList;
   nBoundaryPointsList->SetNumberOfValues(nBoundaries);
 
-  // count the max number of points per face and the number of points
-  // (with duplicates) in mesh
-  vtkIdType maxNFacePoints = 0;
+  // Count the number of points (with duplicates) on boundary patch
   for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
   {
     const vtkFoamPatch& patch = patches[patchi];
@@ -7908,10 +7895,6 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     {
       vtkIdType nFacePoints = meshFaces.GetSize(facei);
       nPoints += nFacePoints;
-      if (maxNFacePoints < nFacePoints)
-      {
-        maxNFacePoints = nFacePoints;
-      }
     }
     nBoundaryPointsList->SetValue(patchi, nPoints);
   }
@@ -7980,10 +7963,6 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     }
   }
 
-  // A per-face scratch array
-  vtkNew<vtkIdList> facePointsVtkId;
-  facePointsVtkId->SetNumberOfIds(maxNFacePoints);
-
   for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
   {
     const vtkFoamPatch& patch = patches[patchi];
@@ -7995,8 +7974,8 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
       (patch.type_ == vtkFoamPatch::PHYSICAL || patch.type_ == vtkFoamPatch::PROCESSOR))
     {
       // Add faces to AllBoundaries
-      this->InsertFacesToGrid(this->AllBoundaries, meshFaces, startFace, endFace,
-        this->InternalPoints, facePointsVtkId, nullptr, false);
+      this->InsertFacesToGrid(
+        this->AllBoundaries, meshFaces, startFace, endFace, nullptr, this->InternalPoints, false);
 
       if (!this->ProcessorName.empty())
       {
@@ -8098,9 +8077,8 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     // Set points for boundary
     bm->SetPoints(boundaryPoints);
 
-    // insert faces to boundary mesh
-    this->InsertFacesToGrid(
-      bm, meshFaces, startFace, endFace, bpMap, facePointsVtkId, nullptr, true);
+    // Insert faces to boundary mesh
+    this->InsertFacesToGrid(bm, meshFaces, startFace, endFace, nullptr, bpMap, true);
     bpMap->ClearLookup();
   }
 
@@ -9822,9 +9800,6 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
   const bool ignoreProcNeighbour = !this->ProcessorName.empty();
   const vtkIdType nInternalFaces = this->NumInternalFaces;
 
-  // Size for per-face scratch array
-  vtkIdType maxNFacePoints = 16;
-
   for (unsigned zonei = 0; zonei < nZones; ++zonei)
   {
     const std::string& zoneName = zones[zonei]->GetKeyword();
@@ -9892,13 +9867,6 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
         {
           elemIds->SetId(nUsed, elemId);
           ++nUsed;
-
-          // For scratch array
-          const vtkIdType nFacePoints = meshFaces.GetSize(elemId);
-          if (maxNFacePoints < nFacePoints)
-          {
-            maxNFacePoints = nFacePoints;
-          }
         }
       }
     }
@@ -9918,16 +9886,12 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
       zoneMap.zones_[zoneName] = elemIds;
     }
 
-    // Per-face scratch array
-    vtkNew<vtkIdList> facePointsVtkId;
-    facePointsVtkId->SetNumberOfIds(maxNFacePoints);
-
     // Allocate new grid: we do not use resize() beforehand since it
     // could lead to undefined pointer if we return by error
     zm->AllocateEstimate(nUsed, 1);
 
     // Insert faces
-    this->InsertFacesToGrid(zm, meshFaces, 0, nUsed, nullptr, facePointsVtkId, elemIds, false);
+    this->InsertFacesToGrid(zm, meshFaces, 0, nUsed, elemIds);
 
     // Set points for zone
     zm->SetPoints(points);
@@ -10138,36 +10102,20 @@ bool vtkOpenFOAMReaderPrivate::GetAreaMesh(
     auto elemIds = vtkSmartPointer<vtkIdList>::New();
     elemIds->SetNumberOfIds(nLabels);
 
-    // Size for per-face scratch array
-    vtkIdType maxNFacePoints = 16;
-
     for (vtkIdType idx = 0; idx < nLabels; ++idx)
     {
       const vtkTypeInt64 elemId = GetLabelValue(labelArray, idx, use64BitLabels);
-
-      const vtkIdType nFacePoints = meshFaces.GetSize(elemId);
-      if (maxNFacePoints < nFacePoints)
-      {
-        maxNFacePoints = nFacePoints;
-      }
-
       elemIds->SetId(idx, elemId);
     }
 
     zoneMap.zones_[NAME_AREAMESH] = elemIds;
 
-    // Per-face scratch array
-    auto facePointsVtkId = vtkSmartPointer<vtkIdList>::New();
-    facePointsVtkId->SetNumberOfIds(maxNFacePoints);
-
     // Allocate new grid: we do not use resize() beforehand since it
     // could lead to undefined pointer if we return by error
-
     areaMesh->AllocateEstimate(nLabels, 1);
 
     // Insert faces
-    this->InsertFacesToGrid(
-      areaMesh, meshFaces, 0, nLabels, nullptr, facePointsVtkId, elemIds, false);
+    this->InsertFacesToGrid(areaMesh, meshFaces, 0, nLabels, elemIds);
 
     // Set points for zone
     areaMesh->SetPoints(points);
-- 
GitLab


From 20132c09b2462ccf4821637a8a512b1a5fad6fb1 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 12 Mar 2021 14:02:09 +0100
Subject: [PATCH 21/36] openfoam: consistent boundary point order

- in OpenFOAM-1.5 and earlier, the patch meshPoints were in increasing
  order but this gave problems in processor point synchronisation and
  was changed to use the order in which faces are visited.
  The VTK reader continued to use older convention (sorted order).

  This was not a bug per se, since the discrepancy in the local patch
  point ordering did not actually affect any of the handled field
  types, which invariably used the mesh point indices to retrieve
  values from the internal field.

  The recently added support for point patch "value" fields exposed
  this inconsistency and prompted this change.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 103 ++++++++++++------------------
 1 file changed, 40 insertions(+), 63 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 646e30cba2a..e00bc165798 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -7880,25 +7880,6 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
   }
   this->BoundaryPointMap = new vtkFoamLabelArrayVector;
 
-  vtkNew<vtkIdTypeArray> nBoundaryPointsList;
-  nBoundaryPointsList->SetNumberOfValues(nBoundaries);
-
-  // Count the number of points (with duplicates) on boundary patch
-  for (vtkIdType patchi = 0; patchi < nBoundaries; ++patchi)
-  {
-    const vtkFoamPatch& patch = patches[patchi];
-    const vtkIdType startFace = patch.startFace();
-    const vtkIdType endFace = patch.endFace();
-
-    vtkIdType nPoints = 0;
-    for (vtkIdType facei = startFace; facei < endFace; ++facei)
-    {
-      vtkIdType nFacePoints = meshFaces.GetSize(facei);
-      nPoints += nFacePoints;
-    }
-    nBoundaryPointsList->SetValue(patchi, nPoints);
-  }
-
   // Use same integer width as per faces
   const bool meshPoints64Bit = meshFaces.IsLabel64();
 
@@ -7943,7 +7924,7 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
 
   if (this->Parent->GetCreateCellToPoint())
   {
-    // Create global to AllBounaries point map
+    // Create global to AllBoundaries point map
     for (vtkIdType pointi = 0; pointi < this->NumPoints; ++pointi)
     {
       if (GetLabelValue(this->InternalPoints, pointi, meshPoints64Bit) == 0)
@@ -8017,34 +7998,9 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
     // Create the boundary patch mesh
     vtkNew<vtkPolyData> bm;
     ::AppendBlock(boundaryMesh, bm, patch.name_);
-
     bm->AllocateEstimate(nFaces, 1);
-    const vtkIdType nBoundaryPoints = nBoundaryPointsList->GetValue(patchi);
-
-    // create global to boundary-local point map and boundary points
-
-    vtkDataArray* boundaryPointList;
-    if (meshPoints64Bit)
-    {
-      boundaryPointList = vtkTypeInt64Array::New();
-    }
-    else
-    {
-      boundaryPointList = vtkTypeInt32Array::New();
-    }
-    boundaryPointList->SetNumberOfValues(nBoundaryPoints);
-    vtkIdType pointi = 0;
-    for (vtkIdType facei = startFace; facei < endFace; ++facei)
-    {
-      const vtkIdType nFacePoints = meshFaces.GetSize(facei);
-      for (int fp = 0; fp < nFacePoints; ++fp)
-      {
-        SetLabelValue(boundaryPointList, pointi, meshFaces.GetValue(facei, fp), meshPoints64Bit);
-        ++pointi;
-      }
-    }
-    vtkSortDataArray::Sort(boundaryPointList);
 
+    // Local to global point index mapping
     vtkDataArray* bpMap;
     if (meshPoints64Bit)
     {
@@ -8055,22 +8011,43 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeBoundaryMesh(
       bpMap = vtkTypeInt32Array::New();
     }
     this->BoundaryPointMap->push_back(bpMap);
+
+    // The point locations for the boundary
     vtkNew<vtkFloatArray> boundaryPointArray;
     boundaryPointArray->SetNumberOfComponents(3);
-    vtkIdType oldPointJ = -1;
-    for (int j = 0; j < nBoundaryPoints; j++)
+
+    // In OpenFOAM-1.5 and earlier, meshPoints were in increasing order
+    // but this gave problems in processor point synchronisation.
+    // - now uses the order in which faces are visited
+
+    // Visit order
+    // - normally with unordered_map to create a global to local map.
+    //   However, we later use LookupValue() method on a regular list,
+    //   so unordered_set is sufficient
     {
-      vtkTypeInt64 pointJ = GetLabelValue(boundaryPointList, j, meshPoints64Bit);
-      if (pointJ != oldPointJ)
+      // A global to local map for marking points
+      std::unordered_set<vtkTypeInt64> markedPoints;
+
+      vtkFoamLabelListList::CellType face;
+      for (vtkIdType facei = startFace; facei < endFace; ++facei)
       {
-        oldPointJ = pointJ;
-        boundaryPointArray->InsertNextTuple(pointArray->GetPointer(3 * pointJ));
-        AppendLabelValue(bpMap, pointJ, meshPoints64Bit);
+        meshFaces.GetCell(facei, face);
+
+        for (const auto meshPointi : face)
+        {
+          auto insertion = markedPoints.emplace(meshPointi);
+          if (insertion.second)
+          {
+            // A previously unvisited point
+            boundaryPointArray->InsertNextTuple(pointArray->GetPointer(3 * meshPointi));
+            AppendLabelValue(bpMap, meshPointi, meshPoints64Bit);
+          }
+        }
       }
     }
-    boundaryPointArray->Squeeze();
     bpMap->Squeeze();
-    boundaryPointList->Delete();
+    boundaryPointArray->Squeeze();
+
     vtkNew<vtkPoints> boundaryPoints;
     boundaryPoints->SetData(boundaryPointArray);
 
@@ -8226,7 +8203,10 @@ bool vtkOpenFOAMReaderPrivate::MoveBoundaryMesh(
   {
     if (patches.isActive(patch.index_))
     {
+      auto* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
       vtkDataArray* bpMap = this->BoundaryPointMap->operator[](activeBoundaryIndex);
+      ++activeBoundaryIndex;
+
       const vtkIdType nBoundaryPoints = bpMap->GetNumberOfTuples();
       const bool meshPoints64Bit = ::Is64BitArray(bpMap);
 
@@ -8241,10 +8221,7 @@ bool vtkOpenFOAMReaderPrivate::MoveBoundaryMesh(
       vtkNew<vtkPoints> boundaryPoints;
       boundaryPoints->SetData(boundaryPointArray);
 
-      auto* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
       bm->SetPoints(boundaryPoints);
-
-      ++activeBoundaryIndex;
     }
   }
 
@@ -9013,6 +8990,8 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
       if (patches.isActive(patch.index_))
       {
         auto* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
+        ++activeBoundaryIndex;
+
         ::AddArrayToFieldData(bm->GetCellData(), vData, io.GetObjectName(), dimString);
 
         if (this->Parent->GetCreateCellToPoint())
@@ -9029,8 +9008,6 @@ void vtkOpenFOAMReaderPrivate::GetVolFieldAtTimeStep(
           this->InterpolateCellToPoint(pData, vData, bm, nullptr, nPoints);
           ::AddArrayToFieldData(bm->GetPointData(), pData, io.GetObjectName(), dimString);
         }
-
-        ++activeBoundaryIndex;
       }
     }
 
@@ -9296,7 +9273,10 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
   {
     if (patches.isActive(patch.index_))
     {
+      auto* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
       vtkDataArray* bpMap = this->BoundaryPointMap->operator[](activeBoundaryIndex);
+      ++activeBoundaryIndex;
+
       const vtkIdType nPoints = bpMap->GetNumberOfTuples();
       const bool meshPoints64Bit = ::Is64BitArray(bpMap);
 
@@ -9359,10 +9339,7 @@ void vtkOpenFOAMReaderPrivate::GetPointFieldAtTimeStep(const std::string& varNam
         }
       }
 
-      auto* bm = vtkPolyData::SafeDownCast(boundaryMesh->GetBlock(activeBoundaryIndex));
       ::AddArrayToFieldData(bm->GetPointData(), vData, io.GetObjectName(), dimString);
-
-      ++activeBoundaryIndex;
     }
   }
 
-- 
GitLab


From c285d3f7acc1c2f2eaba8f8bc98f6dcf78ad9171 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Thu, 18 Mar 2021 23:07:42 +0100
Subject: [PATCH 22/36] openfoam: remove hard-coded limits on polyhedral size

- for some systems, can have a so-called "single-cell" OpenFOAM mesh
  with a single polyhedral cell that has LOTS of faces.

  This can be used for mapping surface noise data to retain most of
  the geometry but entirely discarding the internal field. It can also
  potentially arise from finiteArea situations.

- code cleanup on cell matching to improve readability.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 842 +++++++++++++++---------------
 1 file changed, 433 insertions(+), 409 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index e00bc165798..6d281dc589a 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -490,20 +490,24 @@ typedef vtkFoamDataArrayVector<vtkDataArray> vtkFoamLabelArrayVector;
 //
 // Unlike std::vector, the array is not default initialized
 // and behaves more like std::array in that manner.
+//
+// Since this simple structure is largely used for scratch space,
+// it allocates on growth, but not on shrinking.
+// It has both copying and non-copying reserve/resize methods.
 template <typename T, size_t N = 2 * 64 / sizeof(T)>
 struct vtkFoamStackVector
 {
   typedef T value_type;
 
   /**
-   * Default construct, zero-sized
+   * Default construct, zero length and default capacity
    */
   vtkFoamStackVector() = default;
 
   /**
    * Construct with specified length
    */
-  explicit vtkFoamStackVector(std::size_t len) { this->resize(len); }
+  explicit vtkFoamStackVector(std::size_t len) { this->fast_resize(len); }
 
   ~vtkFoamStackVector()
   {
@@ -525,33 +529,68 @@ struct vtkFoamStackVector
   const T* begin() const noexcept { return ptr; }
   const T* end() const noexcept { return (ptr + size_); }
 
-  void reserve(std::size_t len)
+  T& operator[](std::size_t pos) { return ptr[pos]; }
+  const T& operator[](std::size_t pos) const { return ptr[pos]; }
+
+  // Reserve space, retaining old values on growth. Uses doubling strategy.
+  void copy_reserve(std::size_t len) { _reserve(len, false); }
+
+  // Resize, retaining old values on growth. Uses doubling strategy.
+  void copy_resize(std::size_t len)
   {
-    if (capacity_ < len)
-    {
-      capacity_ = len;
-      if (ptr != stck)
-      {
-        delete[] ptr;
-      }
-      ptr = new T[capacity_];
-    }
+    _reserve(len, false);
+    size_ = len;
   }
 
-  void resize(std::size_t len)
+  // Faster reserve space, may discard old values on growth. Uses doubling strategy.
+  void fast_reserve(std::size_t len) { _reserve(len, true); }
+
+  // Faster resize, may discard old values on growth. Uses doubling strategy.
+  void fast_resize(std::size_t len)
   {
-    reserve(len);
+    _reserve(len, true);
     size_ = len;
   }
 
-  T& operator[](std::size_t pos) { return ptr[pos]; }
-  const T& operator[](std::size_t pos) const { return ptr[pos]; }
-
 private:
   T stck[N];
   T* ptr = stck;
   std::size_t capacity_ = N;
   std::size_t size_ = 0;
+
+  // Reserve space, using doubling strategy.
+  // Fast (non-copying) or copy/move old values on growth.
+  void _reserve(std::size_t len, bool fast)
+  {
+    if (capacity_ < len)
+    {
+      while (capacity_ < len)
+      {
+        capacity_ *= 2;
+      }
+      if (fast)
+      {
+        if (ptr != stck)
+        {
+          delete[] ptr;
+        }
+        ptr = new T[capacity_];
+      }
+      else
+      {
+        T* old = ptr;
+        ptr = new T[capacity_];
+        for (size_t i = 0; i < size_; ++i)
+        {
+          ptr[i] = std::move(old[i]);
+        }
+        if (old != stck)
+        {
+          delete[] old;
+        }
+      }
+    }
+  }
 };
 
 //------------------------------------------------------------------------------
@@ -708,7 +747,7 @@ public:
   {
     auto idx = this->Offsets->GetValue(i);
     const auto last = this->Offsets->GetValue(i + 1);
-    cell.resize(last - idx);
+    cell.fast_resize(last - idx);
 
     auto outIter = cell.begin();
     while (idx != last)
@@ -3486,22 +3525,21 @@ public:
         // xyz (3*scalar) + celli (label)
         // in OpenFOAM 1.4 -> 2.4 also had facei (label) and stepFraction (scalar)
 
-        const unsigned labelSize = (io.IsLabel64() ? 8 : 4);
-        const unsigned tupleLength = (sizeof(primitiveT) * nComponents + labelSize +
-          (io.GetLagrangianPositionsExtraData() ? (labelSize + sizeof(primitiveT)) : 0));
+        const unsigned labelWidth = (io.IsLabel64() ? 8 : 4);
+        const unsigned tupleLength = (sizeof(primitiveT) * nComponents + labelWidth +
+          (io.GetLagrangianPositionsExtraData() ? (labelWidth + sizeof(primitiveT)) : 0));
 
-        // MSVC doesn't support variable-sized stack arrays (JAN-2017)
-        // memory management via std::vector
-        std::vector<unsigned char> bufferContainer;
-        bufferContainer.resize(tupleLength);
-        primitiveT* buffer = reinterpret_cast<primitiveT*>(bufferContainer.data());
+        // Variable-sized stack arrays are non-standard, so use our own version
+        // Have a max of 6 double/int64 elements = 48 bytes. Allocate 64 bytes for good measure
+        vtkFoamStackVector<unsigned char, 64> buffer(tupleLength);
+        primitiveT* tuple = reinterpret_cast<primitiveT*>(buffer.data());
 
         for (vtkTypeInt64 i = 0; i < nTuples; ++i)
         {
           io.ReadExpecting('(');
-          io.Read(reinterpret_cast<unsigned char*>(buffer), tupleLength);
+          io.Read(reinterpret_cast<unsigned char*>(tuple), tupleLength);
           io.ReadExpecting(')');
-          this->Ptr->SetTuple(i, buffer);
+          this->Ptr->SetTuple(i, tuple);
         }
       }
       else
@@ -6905,22 +6943,15 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
 #endif
 )
 {
+  // Scratch arrays
+  vtkFoamStackVector<vtkIdType, 256> cellPoints;  // For inserting primitive cell points
+  vtkFoamStackVector<vtkIdType, 1024> polyPoints; // For inserting polyhedral faces and sizes
+  vtkFoamLabelListList::CellType cellFaces;       // For analyzing cell types (shapes)
+  vtkFoamLabelListList::CellType facePoints;      // For processing individual cell faces
+
   const bool faceOwner64Bit = ::Is64BitArray(this->FaceOwner);
   const bool cellLabels64Bit = faceOwner64Bit; // reasonable assumption
 
-  // Scratch array for inserting primitive cell points
-  constexpr vtkIdType maxNPoints = 256; // max num of points per cell
-  vtkNew<vtkIdList> cellPoints;
-  cellPoints->SetNumberOfIds(maxNPoints);
-
-  // Scratch array for inserting polyhedral faces and sizes
-  constexpr vtkIdType maxNPolyPoints = 1024; // max num of nPoints per face + points per cell
-  vtkNew<vtkIdList> polyPoints;
-  polyPoints->SetNumberOfIds(maxNPolyPoints);
-
-  // Scratch array for analyzing cell types (cell shape)
-  vtkFoamLabelListList::CellType cellFaces;
-
   const vtkIdType nCells = (cellLabels == nullptr ? this->NumCells : cellLabels->GetNumberOfIds());
 
 #if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
@@ -6962,9 +6993,11 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
     // determine type of the cell
     // cf. src/OpenFOAM/meshes/meshShapes/cellMatcher/{hex|prism|pyr|tet}-
     // Matcher.C
+
     int cellType = VTK_POLYHEDRON; // Fallback value
     if (cellFaces.size() == 6)
     {
+      // Check for HEXAHEDRON
       bool allQuads = false;
       for (size_t facei = 0; facei < cellFaces.size(); ++facei)
       {
@@ -6981,6 +7014,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
     }
     else if (cellFaces.size() == 5)
     {
+      // Check for WEDGE or PYRAMID
       int nTris = 0, nQuads = 0;
       for (size_t facei = 0; facei < cellFaces.size(); ++facei)
       {
@@ -7009,6 +7043,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
     }
     else if (cellFaces.size() == 4)
     {
+      // Check for TETRA
       bool allTris = false;
       for (size_t facei = 0; facei < cellFaces.size(); ++facei)
       {
@@ -7024,116 +7059,97 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
       }
     }
 
-    // Not a known (standard) primitive mesh-shape
-    if (cellType == VTK_POLYHEDRON)
-    {
-      bool allEmpty = true;
-      for (size_t facei = 0; facei < cellFaces.size(); ++facei)
-      {
-        allEmpty = (meshFaces.GetSize(cellFaces[facei]) == 0);
-        if (!allEmpty)
-        {
-          break;
-        }
-      }
-      if (allEmpty)
-      {
-        cellType = VTK_EMPTY_CELL;
-      }
-    }
-
     // Cell shape constructor based on the one implementd by Terry
     // Jordan, with lots of improvements. Not as elegant as the one in
     // OpenFOAM but it's simple and works reasonably fast.
 
-    // OFhex | vtkHexahedron
+    // OpenFOAM "hex" | vtkHexahedron
     if (cellType == VTK_HEXAHEDRON)
     {
-      // get first face in correct order
-      vtkTypeInt64 cellBaseFaceId = cellFaces[0];
-      vtkFoamLabelListList::CellType face0Points;
-      meshFaces.GetCell(cellBaseFaceId, face0Points);
+      int nCellPoints = 0;
 
-      if (GetLabelValue(this->FaceOwner, cellBaseFaceId, faceOwner64Bit) == cellId)
+      // Get first face in correct order
       {
-        // if it is an owner face flip the points
-        for (int j = 0; j < 4; j++)
+        const vtkTypeInt64 cellFacei = cellFaces[0];
+        const bool isOwner = (cellId == GetLabelValue(this->FaceOwner, cellFacei, faceOwner64Bit));
+        meshFaces.GetCell(cellFacei, facePoints);
+
+        // Add face0 to cell points - flip owner to point inwards
+        if (isOwner)
         {
-          cellPoints->SetId(j, face0Points[3 - j]);
+          for (int fp = 3; fp >= 0; --fp)
+          {
+            cellPoints[nCellPoints++] = facePoints[fp];
+          }
         }
-      }
-      else
-      {
-        // add base face to cell points
-        for (int j = 0; j < 4; j++)
+        else
         {
-          cellPoints->SetId(j, face0Points[j]);
+          for (int fp = 0; fp < 4; ++fp)
+          {
+            cellPoints[nCellPoints++] = facePoints[fp];
+          }
         }
       }
-      vtkIdType baseFacePoint0 = cellPoints->GetId(0);
-      vtkIdType baseFacePoint2 = cellPoints->GetId(2);
-      vtkTypeInt64 cellOppositeFaceI = -1, pivotPoint = -1;
-      vtkTypeInt64 dupPoint = -1;
-      vtkFoamLabelListList::CellType faceIPoints;
-      for (int faceI = 1; faceI < 5; faceI++) // skip face 0 and 5
+      const vtkIdType baseFacePoint0 = cellPoints[0];
+      const vtkIdType baseFacePoint2 = cellPoints[2];
+      vtkTypeInt64 cellOppositeFaceI = -1;
+      vtkTypeInt64 pivotMeshPoint = -1;
+      int dupPoint = -1;
+      for (int facei = 1; facei < 5; ++facei) // Skip face 0 (already done) and 5 (fallback)
       {
-        vtkTypeInt64 cellFaceI = cellFaces[faceI];
-        meshFaces.GetCell(cellFaceI, faceIPoints);
-        int foundDup = -1, pointI = 0;
-        for (; pointI < 4; pointI++) // each point
+        const vtkTypeInt64 cellFacei = cellFaces[facei];
+        const bool isOwner = (cellId == GetLabelValue(this->FaceOwner, cellFacei, faceOwner64Bit));
+        meshFaces.GetCell(cellFacei, facePoints);
+
+        int foundDup = -1;
+        int pointI = 0;
+        for (; pointI < 4; ++pointI) // each face point
         {
-          vtkTypeInt64 faceIPointI = faceIPoints[pointI];
           // matching two points in base face is enough to find a
           // duplicated point since neighboring faces share two
           // neighboring points (i. e. an edge)
-          if (baseFacePoint0 == faceIPointI)
+          if (baseFacePoint0 == facePoints[pointI])
           {
             foundDup = 0;
             break;
           }
-          else if (baseFacePoint2 == faceIPointI)
+          else if (baseFacePoint2 == facePoints[pointI])
           {
             foundDup = 2;
             break;
           }
         }
-        if (foundDup >= 0)
+        if (foundDup == -1)
         {
-          // find the pivot point if still haven't
-          if (pivotPoint == -1)
+          // No duplicate points found, this is the opposite face
+          cellOppositeFaceI = cellFacei;
+          if (pivotMeshPoint >= 0)
           {
-            dupPoint = foundDup;
-
-            vtkTypeInt64 faceINextPoint = faceIPoints[(pointI + 1) % 4];
-
-            // if the next point of the faceI-th face matches the
-            // previous point of the base face use the previous point
-            // of the faceI-th face as the pivot point; or use the
-            // next point otherwise
-            if (faceINextPoint ==
-              (GetLabelValue(this->FaceOwner, cellFaceI, faceOwner64Bit) == cellId
-                  ? cellPoints->GetId(1 + foundDup)
-                  : cellPoints->GetId(3 - foundDup)))
-            {
-              pivotPoint = faceIPoints[(3 + pointI) % 4];
-            }
-            else
-            {
-              pivotPoint = faceINextPoint;
-            }
-
-            if (cellOppositeFaceI >= 0)
-            {
-              break;
-            }
+            break;
           }
         }
-        else
+        else if (pivotMeshPoint == -1)
         {
-          // if no duplicated point found, faceI is the opposite face
-          cellOppositeFaceI = cellFaceI;
+          // Has duplicate point(s) - find the pivot point if still unknown
+          dupPoint = foundDup;
+
+          const vtkTypeInt64 faceNextPoint = facePoints[(pointI + 1) % 4];
+          const vtkTypeInt64 facePrevPoint = facePoints[(3 + pointI) % 4];
+
+          // if the next point of the faceI-th face matches the
+          // previous point of the base face use the previous point
+          // of the faceI-th face as the pivot point; or use the
+          // next point otherwise
+          if (faceNextPoint == (isOwner ? cellPoints[1 + foundDup] : cellPoints[3 - foundDup]))
+          {
+            pivotMeshPoint = facePrevPoint;
+          }
+          else
+          {
+            pivotMeshPoint = faceNextPoint;
+          }
 
-          if (pivotPoint >= 0)
+          if (cellOppositeFaceI >= 0)
           {
             break;
           }
@@ -7147,13 +7163,12 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
         cellOppositeFaceI = cellFaces[5];
       }
 
-      // find the pivot point in opposite face
-      vtkFoamLabelListList::CellType oppositeFacePoints;
-      meshFaces.GetCell(cellOppositeFaceI, oppositeFacePoints);
+      // Find the pivot point in opposite face
+      meshFaces.GetCell(cellOppositeFaceI, facePoints);
       int pivotPointI = 0;
-      for (; pivotPointI < 4; pivotPointI++)
+      for (; pivotPointI < 4; ++pivotPointI)
       {
-        if (oppositeFacePoints[pivotPointI] == pivotPoint)
+        if (pivotMeshPoint == facePoints[pivotPointI])
         {
           break;
         }
@@ -7165,178 +7180,200 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
       {
         pivotPointI = (pivotPointI + 2) % 4;
       }
-      // copy the face-point list of the opposite face to cell-point list
-      int basePointI = 4;
-      if (GetLabelValue(this->FaceOwner, cellOppositeFaceI, faceOwner64Bit) == cellId)
-      {
-        for (int pointI = pivotPointI; pointI < 4; pointI++)
-        {
-          cellPoints->SetId(basePointI++, oppositeFacePoints[pointI]);
-        }
-        for (int pointI = 0; pointI < pivotPointI; pointI++)
-        {
-          cellPoints->SetId(basePointI++, oppositeFacePoints[pointI]);
-        }
-      }
-      else
+
+      // Copy last (opposite) face in correct order. Copy into cellPoints list
       {
-        for (int pointI = pivotPointI; pointI >= 0; pointI--)
+        const bool isOwner =
+          (cellId == GetLabelValue(this->FaceOwner, cellOppositeFaceI, faceOwner64Bit));
+
+        if (isOwner)
         {
-          cellPoints->SetId(basePointI++, oppositeFacePoints[pointI]);
+          for (int fp = pivotPointI; fp < 4; ++fp)
+          {
+            cellPoints[nCellPoints++] = facePoints[fp];
+          }
+          for (int fp = 0; fp < pivotPointI; ++fp)
+          {
+            cellPoints[nCellPoints++] = facePoints[fp];
+          }
         }
-        for (int pointI = 3; pointI > pivotPointI; pointI--)
+        else
         {
-          cellPoints->SetId(basePointI++, oppositeFacePoints[pointI]);
+          for (int fp = pivotPointI; fp >= 0; --fp)
+          {
+            cellPoints[nCellPoints++] = facePoints[fp];
+          }
+          for (int fp = 3; fp > pivotPointI; --fp)
+          {
+            cellPoints[nCellPoints++] = facePoints[fp];
+          }
         }
       }
 
-      // create the hex cell and insert it into the mesh
-      internalMesh->InsertNextCell(cellType, 8, cellPoints->GetPointer(0));
+      // Add HEXAHEDRON (hex) cell to the mesh
+      internalMesh->InsertNextCell(VTK_HEXAHEDRON, 8, cellPoints.data());
     }
 
-    // the cell construction is about the same as that of a hex, but
-    // the point ordering have to be reversed!!
+    // OpenFOAM "prism" | vtkWedge
+    // - cell construction similar to "hex",
+    // but the OpenFOAM face0 points inwards (like hex) and VTK face0 points outwards
+    // so point ordering is reversed
     else if (cellType == VTK_WEDGE)
     {
-      // find the base face number
+      int nCellPoints = 0;
+
+      // Find the base face number and get it in correct order
       int baseFaceId = 0;
-      for (int j = 0; j < 5; j++)
       {
-        if (meshFaces.GetSize(cellFaces[j]) == 3)
+        for (int facei = 0; facei < 5; ++facei)
         {
-          baseFaceId = j;
-          break;
+          if (meshFaces.GetSize(cellFaces[facei]) == 3)
+          {
+            baseFaceId = facei;
+            break;
+          }
         }
-      }
 
-      // get first face in correct order
-      vtkTypeInt64 cellBaseFaceId = cellFaces[baseFaceId];
-      vtkFoamLabelListList::CellType face0Points;
-      meshFaces.GetCell(cellBaseFaceId, face0Points);
+        const vtkTypeInt64 cellFacei = cellFaces[baseFaceId];
+        const bool isOwner = (cellId == GetLabelValue(this->FaceOwner, cellFacei, faceOwner64Bit));
+        meshFaces.GetCell(cellFacei, facePoints);
 
-      if (GetLabelValue(this->FaceOwner, cellBaseFaceId, faceOwner64Bit) == cellId)
-      {
-        for (int j = 0; j < 3; j++)
+        // Add face0 to cell points - flip neighbour to point outwards
+        // - OpenFOAM face0 points inwards
+        // - VTK face0 points outwards
+        if (isOwner)
         {
-          cellPoints->SetId(j, face0Points[j]);
+          for (int fp = 0; fp < 3; ++fp)
+          {
+            cellPoints[nCellPoints++] = facePoints[fp];
+          }
         }
-      }
-      else
-      {
-        // if it is a neighbor face flip the points
-        for (int j = 0; j < 3; j++)
+        else
         {
-          // add base face to cell points
-          cellPoints->SetId(j, face0Points[2 - j]);
+          for (int fp = 2; fp >= 0; --fp)
+          {
+            cellPoints[nCellPoints++] = facePoints[fp];
+          }
         }
       }
-      vtkIdType baseFacePoint0 = cellPoints->GetId(0);
-      vtkIdType baseFacePoint2 = cellPoints->GetId(2);
-      vtkTypeInt64 cellOppositeFaceI = -1, pivotPoint = -1;
+      const vtkIdType baseFacePoint0 = cellPoints[0];
+      const vtkIdType baseFacePoint2 = cellPoints[2];
+
+      vtkTypeInt64 cellOppositeFaceI = -1;
+      vtkTypeInt64 pivotMeshPoint = -1;
       bool dupPoint2 = false;
-      vtkFoamLabelListList::CellType faceIPoints;
-      for (int faceI = 0; faceI < 5; faceI++)
+      // Search for opposite face and pivot point
+      for (int facei = 0; facei < 5; ++facei)
       {
-        if (faceI == baseFaceId)
+        if (facei == baseFaceId)
         {
           continue;
         }
-        vtkTypeInt64 cellFaceI = cellFaces[faceI];
-        if (meshFaces.GetSize(cellFaceI) == 3)
+        const vtkTypeInt64 cellFacei = cellFaces[facei];
+        if (meshFaces.GetSize(cellFacei) == 3)
         {
-          cellOppositeFaceI = cellFaceI;
+          cellOppositeFaceI = cellFacei;
         }
-        // find the pivot point if still haven't
-        else if (pivotPoint == -1)
+        else if (pivotMeshPoint == -1)
         {
-          meshFaces.GetCell(cellFaceI, faceIPoints);
+          // Find the pivot point if still unknown
+          const bool isOwner =
+            (cellId == GetLabelValue(this->FaceOwner, cellFacei, faceOwner64Bit));
+          meshFaces.GetCell(cellFacei, facePoints);
+
           bool found0Dup = false;
           int pointI = 0;
-          for (; pointI < 4; pointI++) // each point
+          for (; pointI < 4; ++pointI) // each face point
           {
-            vtkTypeInt64 faceIPointI = faceIPoints[pointI];
             // matching two points in base face is enough to find a
             // duplicated point since neighboring faces share two
             // neighboring points (i. e. an edge)
-            if (baseFacePoint0 == faceIPointI)
+            if (baseFacePoint0 == facePoints[pointI])
             {
               found0Dup = true;
               break;
             }
-            else if (baseFacePoint2 == faceIPointI)
+            else if (baseFacePoint2 == facePoints[pointI])
             {
               break;
             }
           }
           // the matching point must always be found so omit the check
-          vtkIdType baseFacePrevPoint, baseFaceNextPoint;
+          vtkIdType baseFacePrevPoint;
+          vtkIdType baseFaceNextPoint;
           if (found0Dup)
           {
-            baseFacePrevPoint = cellPoints->GetId(2);
-            baseFaceNextPoint = cellPoints->GetId(1);
+            baseFacePrevPoint = cellPoints[2];
+            baseFaceNextPoint = cellPoints[1];
           }
           else
           {
-            baseFacePrevPoint = cellPoints->GetId(1);
-            baseFaceNextPoint = cellPoints->GetId(0);
+            baseFacePrevPoint = cellPoints[1];
+            baseFaceNextPoint = cellPoints[0];
             dupPoint2 = true;
           }
 
-          vtkTypeInt64 faceINextPoint = faceIPoints[(pointI + 1) % 4];
-          vtkTypeInt64 faceIPrevPoint = faceIPoints[(3 + pointI) % 4];
+          const vtkTypeInt64 faceNextPoint = facePoints[(pointI + 1) % 4];
+          const vtkTypeInt64 facePrevPoint = facePoints[(3 + pointI) % 4];
 
           // if the next point of the faceI-th face matches the
           // previous point of the base face use the previous point of
           // the faceI-th face as the pivot point; or use the next
           // point otherwise
-          vtkTypeInt64 faceOwnerVal = GetLabelValue(this->FaceOwner, cellFaceI, faceOwner64Bit);
-          if (faceINextPoint == (faceOwnerVal == cellId ? baseFacePrevPoint : baseFaceNextPoint))
+
+          if (faceNextPoint == (isOwner ? baseFacePrevPoint : baseFaceNextPoint))
           {
-            pivotPoint = faceIPrevPoint;
+            pivotMeshPoint = facePrevPoint;
           }
           else
           {
-            pivotPoint = faceINextPoint;
+            pivotMeshPoint = faceNextPoint;
           }
         }
 
         // break when both of opposite face and pivot point are found
-        if (cellOppositeFaceI >= 0 && pivotPoint >= 0)
+        if (cellOppositeFaceI >= 0 && pivotMeshPoint >= 0)
         {
           break;
         }
       }
 
-      // find the pivot point in opposite face
-      vtkFoamLabelListList::CellType oppositeFacePoints;
-      meshFaces.GetCell(cellOppositeFaceI, oppositeFacePoints);
-      int pivotPointI = 0;
-      for (; pivotPointI < 3; pivotPointI++)
+      // Find the pivot point in opposite face
+      meshFaces.GetCell(cellOppositeFaceI, facePoints);
+      int pivotPointI = -1;
+      for (int fp = 0; fp < 3; ++fp)
       {
-        if (oppositeFacePoints[pivotPointI] == pivotPoint)
+        if (pivotMeshPoint == facePoints[fp])
         {
+          pivotPointI = fp;
           break;
         }
       }
-      if (pivotPointI != 3)
+
+      if (pivotPointI == -1)
+      {
+        // No pivot found - does not look like a wedge, process as polyhedron instead.
+        cellType = VTK_POLYHEDRON;
+      }
+      else
       {
-        // We have found a pivot. We can process cell as a wedge
-        vtkTypeInt64 faceOwnerVal =
-          GetLabelValue(this->FaceOwner, static_cast<vtkIdType>(cellOppositeFaceI), faceOwner64Bit);
-        if (faceOwnerVal == cellId)
+        // Found a pivot - can process cell as a wedge
+        const bool isOwner =
+          (cellId == GetLabelValue(this->FaceOwner, cellOppositeFaceI, faceOwner64Bit));
+
+        if (isOwner)
         {
           if (dupPoint2)
           {
             pivotPointI = (pivotPointI + 2) % 3;
           }
-          int basePointI = 3;
-          for (int pointI = pivotPointI; pointI >= 0; pointI--)
+          for (int fp = pivotPointI; fp >= 0; --fp)
           {
-            cellPoints->SetId(basePointI++, oppositeFacePoints[pointI]);
+            cellPoints[nCellPoints++] = facePoints[fp];
           }
-          for (int pointI = 2; pointI > pivotPointI; pointI--)
+          for (int fp = 2; fp > pivotPointI; --fp)
           {
-            cellPoints->SetId(basePointI++, oppositeFacePoints[pointI]);
+            cellPoints[nCellPoints++] = facePoints[fp];
           }
         }
         else
@@ -7347,120 +7384,124 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
           {
             pivotPointI = (1 + pivotPointI) % 3;
           }
-          // copy the face-point list of the opposite face to cell-point list
-          int basePointI = 3;
-          for (int pointI = pivotPointI; pointI < 3; pointI++)
+          // copy the face-point list of the opposite face to cellPoints list
+          for (int fp = pivotPointI; fp < 3; ++fp)
           {
-            cellPoints->SetId(basePointI++, oppositeFacePoints[pointI]);
+            cellPoints[nCellPoints++] = facePoints[fp];
           }
-          for (int pointI = 0; pointI < pivotPointI; pointI++)
+          for (int fp = 0; fp < pivotPointI; ++fp)
           {
-            cellPoints->SetId(basePointI++, oppositeFacePoints[pointI]);
+            cellPoints[nCellPoints++] = facePoints[fp];
           }
         }
 
-        // create the wedge cell and insert it into the mesh
-        internalMesh->InsertNextCell(cellType, 6, cellPoints->GetPointer(0));
-      }
-      else
-      {
-        // We did not find a pivot: this cell was suspected to be a wedge but it
-        // is not. Let's process it like a polyhedron instead.
-        cellType = VTK_POLYHEDRON;
+        // Add WEDGE (prism) cell to the mesh
+        internalMesh->InsertNextCell(VTK_WEDGE, 6, cellPoints.data());
       }
     }
 
-    // OFpyramid | vtkPyramid || OFtet | vtkTetrahedron
+    // OpenFOAM "pyr" | vtkPyramid || OpenFOAM "tet" | vtkTetrahedron
     else if (cellType == VTK_PYRAMID || cellType == VTK_TETRA)
     {
-      const vtkIdType nPoints = (cellType == VTK_PYRAMID ? 5 : 4);
-      size_t baseFaceId = 0;
+      const vtkIdType nCellPoints = (cellType == VTK_PYRAMID ? 5 : 4);
+
+      int baseFaceId = 0;
       if (cellType == VTK_PYRAMID)
       {
         // Find the pyramid base
-        for (size_t j = 0; j < cellFaces.size(); j++)
+        for (size_t facei = 0; facei < cellFaces.size(); ++facei)
         {
-          if (meshFaces.GetSize(cellFaces[j]) == 4)
+          if (meshFaces.GetSize(cellFaces[facei]) == 4)
           {
-            baseFaceId = j;
+            baseFaceId = static_cast<int>(facei);
             break;
           }
         }
       }
 
-      const vtkTypeInt64 cellBaseFaceId = cellFaces[baseFaceId];
-      vtkFoamLabelListList::CellType baseFacePoints;
-      meshFaces.GetCell(cellBaseFaceId, baseFacePoints);
-
-      // Take any adjacent (non-base) face
-      const size_t adjacentFaceId = (baseFaceId ? 0 : 1);
-      const vtkTypeInt64 cellAdjacentFaceId = cellFaces[adjacentFaceId];
-
-      vtkFoamLabelListList::CellType adjacentFacePoints;
-      meshFaces.GetCell(cellAdjacentFaceId, adjacentFacePoints);
-
-      // Find the apex point (non-common to the base)
-      // initialize with anything
-      // - if the search really fails, we have much bigger problems anyhow
-      vtkIdType apexPointI = adjacentFacePoints[0];
-      for (size_t ptI = 0; ptI < adjacentFacePoints.size(); ++ptI)
+      // Add base-face points to cell points - flip for owner (to point inwards)
       {
-        apexPointI = adjacentFacePoints[ptI];
-        bool foundDup = false;
-        for (size_t baseI = 0; baseI < baseFacePoints.size(); ++baseI)
+        const vtkTypeInt64 cellFacei = cellFaces[baseFaceId];
+        const bool isOwner = (cellId == GetLabelValue(this->FaceOwner, cellFacei, faceOwner64Bit));
+        meshFaces.GetCell(cellFacei, facePoints);
+        const size_t nFacePoints = facePoints.size();
+
+        if (isOwner)
         {
-          foundDup = (apexPointI == baseFacePoints[baseI]);
-          if (foundDup)
+          for (size_t fp = 0, endp = nFacePoints - 1; fp < nFacePoints; ++fp, --endp)
           {
-            break;
+            cellPoints[fp] = facePoints[endp];
           }
         }
-        if (!foundDup)
+        else
         {
-          break;
+          for (size_t fp = 0; fp < nFacePoints; ++fp)
+          {
+            cellPoints[fp] = facePoints[fp];
+          }
         }
       }
 
-      // Add base-face points (in order) to cell points
-      if (GetLabelValue(this->FaceOwner, cellBaseFaceId, faceOwner64Bit) == cellId)
+      // Take any other face to find the apex point
+      vtkFoamLabelListList::CellType otherFacePoints;
+      meshFaces.GetCell(cellFaces[(baseFaceId ? 0 : 1)], otherFacePoints);
+
+      // Find the apex point (non-common to the base)
+      // initialize with anything
+      // - if the search really fails, we have much bigger problems anyhow
+      vtkIdType apexMeshPointi = 0;
+      for (size_t otheri = 0; otheri < otherFacePoints.size(); ++otheri)
       {
-        // if it is an owner face, flip the points (to point inwards)
-        for (vtkIdType j = 0; j < static_cast<vtkIdType>(baseFacePoints.size()); ++j)
+        apexMeshPointi = otherFacePoints[otheri];
+        bool isUnique = true;
+        for (size_t fp = 0; isUnique && fp < facePoints.size(); ++fp)
         {
-          cellPoints->SetId(j, baseFacePoints[baseFacePoints.size() - 1 - j]);
+          isUnique = (apexMeshPointi != facePoints[fp]);
         }
-      }
-      else
-      {
-        for (vtkIdType j = 0; j < static_cast<vtkIdType>(baseFacePoints.size()); ++j)
+        if (isUnique)
         {
-          cellPoints->SetId(j, baseFacePoints[j]);
+          break;
         }
       }
 
       // ... and add the apex-point
-      cellPoints->SetId(nPoints - 1, apexPointI);
-
-      // create the tetra or pyramid cell and insert it into the mesh
-      internalMesh->InsertNextCell(cellType, nPoints, cellPoints->GetPointer(0));
-    }
+      cellPoints[nCellPoints - 1] = apexMeshPointi;
 
-    // erroneous cells
-    else if (cellType == VTK_EMPTY_CELL)
-    {
-      vtkWarningMacro("Warning: No points in cellId " << cellId);
-      internalMesh->InsertNextCell(VTK_EMPTY_CELL, 0, cellPoints->GetPointer(0));
+      // Add tetra or pyramid to the mesh
+      internalMesh->InsertNextCell(cellType, nCellPoints, cellPoints.data());
     }
 
-    // OFpolyhedron || vtkPolyhedron
+    // Polyhedron cell (vtkPolyhedron)
     if (cellType == VTK_POLYHEDRON)
     {
+      // Preliminary checks for sizes and sanity check
+
+      size_t nPolyPoints = 0;
+      {
+        bool allEmpty = true;
+        for (size_t facei = 0; facei < cellFaces.size(); ++facei)
+        {
+          const size_t nFacePoints = meshFaces.GetSize(cellFaces[facei]);
+          nPolyPoints += nFacePoints;
+          if (nFacePoints)
+          {
+            allEmpty = false;
+          }
+        }
+        if (allEmpty)
+        {
+          vtkWarningMacro("Warning: No points in cellId " << cellId);
+          internalMesh->InsertNextCell(VTK_EMPTY_CELL, 0, cellPoints.data());
+          continue;
+        }
+      }
+
 #if VTK_FOAMFILE_DECOMPOSE_POLYHEDRA
       if (additionalCells != nullptr)
       {
         // Decompose into tets and pyramids
 
-        // calculate cell centroid and insert it to point list
+        // Calculate cell centroid and insert it to point list
         vtkDataArray* polyCellPoints;
         if (cellLabels64Bit)
         {
@@ -7474,29 +7515,23 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
 
         double centroid[3];
         centroid[0] = centroid[1] = centroid[2] = 0; // zero the contents
-        for (size_t j = 0; j < cellFaces.size(); j++)
+        for (size_t facei = 0; facei < cellFaces.size(); ++facei)
         {
-          // remove duplicate points from faces
-          vtkTypeInt64 cellFacesJ = cellFaces[j];
-          vtkFoamLabelListList::CellType faceJPoints;
-          meshFaces.GetCell(cellFacesJ, faceJPoints);
-          for (size_t k = 0; k < faceJPoints.size(); k++)
+          // Eliminate duplicate points from faces
+          const vtkTypeInt64 cellFacei = cellFaces[facei];
+          meshFaces.GetCell(cellFacei, facePoints);
+          for (size_t fp = 0; fp < facePoints.size(); ++fp)
           {
-            const vtkTypeInt64 faceJPointK = faceJPoints[k];
-            bool foundDup = false;
-            for (vtkIdType l = 0; l < polyCellPoints->GetDataSize(); l++)
+            const vtkTypeInt64 meshPointi = facePoints[fp];
+            bool isUnique = true;
+            for (vtkIdType cp = 0; isUnique && cp < polyCellPoints->GetDataSize(); ++cp)
             {
-              const vtkTypeInt64 polyCellPointi = GetLabelValue(polyCellPoints, l, cellLabels64Bit);
-              if (polyCellPointi == faceJPointK)
-              {
-                foundDup = true;
-                break; // look no more
-              }
+              isUnique = (meshPointi != GetLabelValue(polyCellPoints, cp, cellLabels64Bit));
             }
-            if (!foundDup)
+            if (isUnique)
             {
-              AppendLabelValue(polyCellPoints, faceJPointK, cellLabels64Bit);
-              const float* tuple = pointArray->GetPointer(3 * faceJPointK);
+              AppendLabelValue(polyCellPoints, meshPointi, cellLabels64Bit);
+              const float* tuple = pointArray->GetPointer(3 * meshPointi);
               centroid[0] += static_cast<double>(tuple[0]);
               centroid[1] += static_cast<double>(tuple[1]);
               centroid[2] += static_cast<double>(tuple[2]);
@@ -7517,14 +7552,16 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
         // graphics/PVFoamReader/vtkFoam/vtkFoamAddInternalMesh.C
         bool insertDecomposedCell = true;
         int nAdditionalCells = 0;
-        for (size_t j = 0; j < cellFaces.size(); j++)
+        for (size_t facei = 0; facei < cellFaces.size(); ++facei)
         {
-          vtkTypeInt64 cellFacesJ = cellFaces[j];
-          vtkFoamLabelListList::CellType faceJPoints;
-          meshFaces.GetCell(cellFacesJ, faceJPoints);
-          vtkTypeInt64 faceOwnerValue = GetLabelValue(this->FaceOwner, cellFacesJ, faceOwner64Bit);
-          int flipNeighbor = (faceOwnerValue == cellId ? -1 : 1);
-          size_t nTris = faceJPoints.size() % 2;
+          const vtkTypeInt64 cellFacei = cellFaces[facei];
+          const bool isOwner =
+            (cellId == GetLabelValue(this->FaceOwner, cellFacei, faceOwner64Bit));
+          meshFaces.GetCell(cellFacei, facePoints);
+          const size_t nFacePoints = facePoints.size();
+
+          const int flipNeighbor = (isOwner ? -1 : 1);
+          const size_t nTris = (nFacePoints % 2);
 
           size_t vertI = 2;
 
@@ -7534,11 +7571,11 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
           // which stops time integration of Stream Tracer especially
           // for split-hex unstructured meshes created by
           // e. g. autoRefineMesh
-          if (faceJPoints.size() >= 5 && nTris)
+          if (nFacePoints >= 5 && nTris)
           {
-            const float* point0 = pointArray->GetPointer(3 * faceJPoints[faceJPoints.size() - 1]);
-            const float* point1 = pointArray->GetPointer(3 * faceJPoints[0]);
-            const float* point2 = pointArray->GetPointer(3 * faceJPoints[faceJPoints.size() - 2]);
+            const float* point0 = pointArray->GetPointer(3 * facePoints[nFacePoints - 1]);
+            const float* point1 = pointArray->GetPointer(3 * facePoints[0]);
+            const float* point2 = pointArray->GetPointer(3 * facePoints[nFacePoints - 2]);
             float vsizeSqr1 = 0.0F, vsizeSqr2 = 0.0F, dotProduct = 0.0F;
             for (int i = 0; i < 3; i++)
             {
@@ -7555,32 +7592,31 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
             }
           }
 
-          cellPoints->SetId(0,
-            faceJPoints[(vertI == 2) ? static_cast<vtkIdType>(0)
-                                     : static_cast<vtkIdType>(faceJPoints.size() - 1)]);
-          cellPoints->SetId(4, static_cast<vtkIdType>(this->NumPoints + nAdditionalPoints));
+          cellPoints[0] = facePoints[(vertI == 2) ? static_cast<vtkIdType>(0)
+                                                  : static_cast<vtkIdType>(nFacePoints - 1)];
+          cellPoints[4] = static_cast<vtkIdType>(this->NumPoints + nAdditionalPoints);
 
           // decompose a face into quads in order (flipping the
           // decomposed face if owner)
-          size_t nQuadVerts = faceJPoints.size() - 1 - nTris;
+          const size_t nQuadVerts = nFacePoints - 1 - nTris;
           for (; vertI < nQuadVerts; vertI += 2)
           {
-            cellPoints->SetId(1, faceJPoints[vertI - flipNeighbor]);
-            cellPoints->SetId(2, faceJPoints[vertI]);
-            cellPoints->SetId(3, faceJPoints[vertI + flipNeighbor]);
+            cellPoints[1] = facePoints[vertI - flipNeighbor];
+            cellPoints[2] = facePoints[vertI];
+            cellPoints[3] = facePoints[vertI + flipNeighbor];
 
             // if the decomposed cell is the first one insert it to
             // the original position; or append to the decomposed cell
             // list otherwise
             if (insertDecomposedCell)
             {
-              internalMesh->InsertNextCell(VTK_PYRAMID, 5, cellPoints->GetPointer(0));
+              internalMesh->InsertNextCell(VTK_PYRAMID, 5, cellPoints.data());
               insertDecomposedCell = false;
             }
             else
             {
-              nAdditionalCells++;
-              additionalCells->InsertNextTypedTuple(cellPoints->GetPointer(0));
+              ++nAdditionalCells;
+              additionalCells->InsertNextTypedTuple(cellPoints.data());
             }
           }
 
@@ -7589,32 +7625,32 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
           {
             if (flipNeighbor == -1)
             {
-              cellPoints->SetId(1, faceJPoints[vertI]);
-              cellPoints->SetId(2, faceJPoints[vertI - 1]);
+              cellPoints[1] = facePoints[vertI];
+              cellPoints[2] = facePoints[vertI - 1];
             }
             else
             {
-              cellPoints->SetId(1, faceJPoints[vertI - 1]);
-              cellPoints->SetId(2, faceJPoints[vertI]);
+              cellPoints[1] = facePoints[vertI - 1];
+              cellPoints[2] = facePoints[vertI];
             }
-            cellPoints->SetId(3, static_cast<vtkIdType>(this->NumPoints + nAdditionalPoints));
+            cellPoints[3] = static_cast<vtkIdType>(this->NumPoints + nAdditionalPoints);
 
             if (insertDecomposedCell)
             {
-              internalMesh->InsertNextCell(VTK_TETRA, 4, cellPoints->GetPointer(0));
+              internalMesh->InsertNextCell(VTK_TETRA, 4, cellPoints.data());
               insertDecomposedCell = false;
             }
             else
             {
               // set the 5th vertex number to -1 to distinguish a tetra cell
-              cellPoints->SetId(4, -1);
-              nAdditionalCells++;
-              additionalCells->InsertNextTypedTuple(cellPoints->GetPointer(0));
+              cellPoints[4] = -1;
+              ++nAdditionalCells;
+              additionalCells->InsertNextTypedTuple(cellPoints.data());
             }
           }
         }
 
-        nAdditionalPoints++;
+        ++nAdditionalPoints;
         this->AdditionalCellIds->InsertNextValue(cellId);
         this->NumAdditionalCells->InsertNextValue(nAdditionalCells);
         this->NumTotalAdditionalCells += nAdditionalCells;
@@ -7624,105 +7660,93 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
       {
         // Not decomposed - using VTK_POLYHEDRON
 
-        // get first face
-        vtkTypeInt64 cellFaces0 = cellFaces[0];
-        vtkFoamLabelListList::CellType baseFacePoints;
-        meshFaces.GetCell(cellFaces0, baseFacePoints);
-        size_t nPoints = baseFacePoints.size();
-        size_t nPolyPoints = baseFacePoints.size() + 1;
-        if (nPoints > static_cast<size_t>(maxNPoints) ||
-          nPolyPoints > static_cast<size_t>(maxNPolyPoints))
-        {
-          vtkErrorMacro(<< "Too large polyhedron at cellId = " << cellId);
-          return;
-        }
-        polyPoints->SetId(0, static_cast<vtkIdType>(baseFacePoints.size()));
-        vtkTypeInt64 faceOwnerValue = GetLabelValue(this->FaceOwner, cellFaces0, faceOwner64Bit);
-        if (faceOwnerValue == cellId)
-        {
-          // add first face to cell points
-          for (size_t j = 0; j < baseFacePoints.size(); j++)
-          {
-            vtkTypeInt64 pointJ = baseFacePoints[j];
-            cellPoints->SetId(static_cast<vtkIdType>(j), static_cast<vtkIdType>(pointJ));
-            polyPoints->SetId(static_cast<vtkIdType>(j + 1), static_cast<vtkIdType>(pointJ));
-          }
-        }
-        else
-        {
-          // if it is a _neighbor_ face flip the points
-          for (size_t j = 0; j < baseFacePoints.size(); j++)
-          {
-            vtkTypeInt64 pointJ = baseFacePoints[baseFacePoints.size() - 1 - j];
-            cellPoints->SetId(static_cast<vtkIdType>(j), static_cast<vtkIdType>(pointJ));
-            polyPoints->SetId(static_cast<vtkIdType>(j + 1), static_cast<vtkIdType>(pointJ));
-          }
-        }
+        // Precalculated 'nPolyPoints' has all face points, including duplicates
+        // - need nPolyPoints + nPolyFaces for the face loops
+        // - use nPolyPoints to estimate unique cell points
+        //   (assume a point connects at least three faces)
+
+        cellPoints.fast_reserve(nPolyPoints / 3);
+        polyPoints.fast_reserve(nPolyPoints + cellFaces.size());
 
-        // loop through faces and create a list of all points
-        // j = 1 skip baseFace
-        for (size_t j = 1; j < cellFaces.size(); j++)
+        size_t nCellPoints = 0;
+        nPolyPoints = 0; // Reset
+
+        for (size_t facei = 0; facei < cellFaces.size(); ++facei)
         {
-          // remove duplicate points from faces
-          vtkTypeInt64 cellFacesJ = cellFaces[j];
-          vtkFoamLabelListList::CellType faceJPoints;
-          meshFaces.GetCell(cellFacesJ, faceJPoints);
-          if (nPolyPoints >= static_cast<size_t>(maxNPolyPoints))
-          {
-            vtkErrorMacro(<< "Too large polyhedron at cellId = " << cellId);
-            return;
-          }
-          polyPoints->SetId(
-            static_cast<vtkIdType>(nPolyPoints++), static_cast<vtkIdType>(faceJPoints.size()));
-          int pointI, delta; // must be signed
-          faceOwnerValue = GetLabelValue(this->FaceOwner, cellFacesJ, faceOwner64Bit);
-          if (faceOwnerValue == cellId)
+          const vtkTypeInt64 cellFacei = cellFaces[facei];
+          const bool isOwner =
+            (cellId == GetLabelValue(this->FaceOwner, cellFacei, faceOwner64Bit));
+          meshFaces.GetCell(cellFacei, facePoints);
+          const size_t nFacePoints = facePoints.size();
+
+          // Local face point indexing - must be signed
+          // Flip direction for neighbour face
+          int facePointi = (isOwner ? 0 : static_cast<int>(nFacePoints) - 1);
+          const int faceDirn = (isOwner ? 1 : -1);
+
+          if (!nCellPoints && !nPolyPoints)
           {
-            pointI = 0;
-            delta = 1;
+            // First face - add directly (no duplicate points)
+            cellPoints.copy_resize(nCellPoints + nFacePoints);
+            polyPoints.copy_resize(nPolyPoints + nFacePoints + 1);
+
+            // Add face to cell points, and to polyPoints
+            polyPoints[nPolyPoints++] = static_cast<vtkIdType>(nFacePoints);
+            for (size_t fp = 0; fp < nFacePoints; ++fp, facePointi += faceDirn)
+            {
+              const auto meshPointi = static_cast<vtkIdType>(facePoints[facePointi]);
+              cellPoints[nCellPoints++] = meshPointi;
+              polyPoints[nPolyPoints++] = meshPointi;
+            }
           }
           else
           {
-            // if it is a _neighbor_ face flip the points
-            pointI = static_cast<int>(faceJPoints.size()) - 1;
-            delta = -1;
-          }
-          for (size_t k = 0; k < faceJPoints.size(); k++, pointI += delta)
-          {
-            vtkTypeInt64 faceJPointK = faceJPoints[pointI];
-            bool foundDup = false;
-            for (vtkIdType l = 0; l < static_cast<vtkIdType>(nPoints); l++)
+            // Subsequent faces - avoid duplicate points
+
+            // Pass 1: add face points, and mark up any duplicates too
+            // Grow if needed, preserve content
+            polyPoints.copy_resize(nPolyPoints + nFacePoints + 1);
+
+            // Add face to poly (face) points
+            polyPoints[nPolyPoints++] = static_cast<vtkIdType>(nFacePoints);
+            size_t nUnique = 0;
+            for (size_t fp = 0; fp < nFacePoints; ++fp, facePointi += faceDirn)
             {
-              if (cellPoints->GetId(l) == faceJPointK)
+              const auto meshPointi = static_cast<vtkIdType>(facePoints[facePointi]);
+              polyPoints[nPolyPoints++] = meshPointi;
+              bool isUnique = true;
+              for (size_t cp = 0; isUnique && cp < nCellPoints; ++cp)
               {
-                foundDup = true;
-                break; // look no more
+                isUnique = (cellPoints[cp] != meshPointi);
               }
-            }
-            if (!foundDup)
-            {
-              if (nPoints >= static_cast<size_t>(maxNPoints))
+              if (isUnique)
+              {
+                ++nUnique;
+              }
+              else
               {
-                vtkErrorMacro(<< "Too large polyhedron at cellId = " << cellId);
-                return;
+                facePoints[facePointi] = -1; // Duplicate
               }
-              cellPoints->SetId(
-                static_cast<vtkIdType>(nPoints++), static_cast<vtkIdType>(faceJPointK));
             }
-            if (nPolyPoints >= static_cast<size_t>(maxNPolyPoints))
+
+            // Grow if needed, preserve content
+            cellPoints.copy_resize(nCellPoints + nUnique);
+
+            // Pass 2: add unique cell points - order is arbitrary
+            for (size_t fp = 0; fp < nFacePoints; ++fp)
             {
-              vtkErrorMacro(<< "Too large polyhedron at cellId = " << cellId);
-              return;
+              const auto meshPointi = static_cast<vtkIdType>(facePoints[fp]);
+              if (meshPointi != -1) // isUnique
+              {
+                cellPoints[nCellPoints++] = meshPointi;
+              }
             }
-            polyPoints->SetId(
-              static_cast<vtkIdType>(nPolyPoints++), static_cast<vtkIdType>(faceJPointK));
           }
         }
 
-        // create the poly cell and insert it into the mesh
-        internalMesh->InsertNextCell(VTK_POLYHEDRON, static_cast<vtkIdType>(nPoints),
-          cellPoints->GetPointer(0), static_cast<vtkIdType>(cellFaces.size()),
-          polyPoints->GetPointer(0));
+        // Create the poly cell and insert it into the mesh
+        internalMesh->InsertNextCell(VTK_POLYHEDRON, static_cast<vtkIdType>(nCellPoints),
+          cellPoints.data(), static_cast<vtkIdType>(cellFaces.size()), polyPoints.data());
       }
     }
   }
@@ -7818,7 +7842,7 @@ void vtkOpenFOAMReaderPrivate::InsertFacesToGrid(vtkPolyData* boundaryMesh,
     }
 
     const int nFacePoints = static_cast<int>(meshFaces.GetSize(faceId));
-    facePointIds.resize(nFacePoints);
+    facePointIds.fast_resize(nFacePoints);
 
     if (isLookupValue)
     {
-- 
GitLab


From 45ceee9acb504ba70066cac385617f2e75356752 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 19 Mar 2021 01:54:47 +0100
Subject: [PATCH 23/36] openfoam: tune parser handling of string lists in
 dictionaries

- While any particular OpenFOAM class using dictionary input
  knows what to expect, our parser does not or cannot.

  For an entry with a list of words, it could have two equivalent
  forms:

      1.  keyword  (abc def);
      2.  keyword  2(abc def);

  The parser tokenizes these as

      1.  STRINGLIST
      2.  LABEL STRINGLIST

  Instead of making the parser itself more aggressive, settle for
  fixing up the parse result. When a dictionary entry matches that
  pattern (ie, has label + stringlist and the sizes match), drop
  the redundant size token.

  To be a bit more conservative, limit the fixup to entries that
  contains no other tokens.

BUG: the token IsLabel() condition was incorrect/overly aggressive

- align some token methods with OpenFOAM equivalents.
  Eg, IsPunctuation(char), IsLabel(int) tests.

STYLE: token qualifiers, consistent infinite loop

- move dictionary read implementation out of line,
  in preparation for using dictionary to support
  meta information for an IOobject.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 901 ++++++++++++++++--------------
 1 file changed, 473 insertions(+), 428 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 6d281dc589a..5fcb7cdd28c 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -1554,7 +1554,7 @@ protected:
     double Double;
     // Any/all pointer types
     void* AnyPointer;
-    std::string* String;
+    std::string* StringPtr;
     // List types (vtkObject-derived)
     vtkObjectBase* VtkObjectPtr;
     vtkTypeInt8Array* BoolListPtr;
@@ -1572,7 +1572,7 @@ protected:
   {
     if (this->Type == STRING || this->Type == IDENTIFIER) // IsStringType
     {
-      delete this->String;
+      delete this->StringPtr;
     }
   }
 
@@ -1591,7 +1591,7 @@ protected:
         break;
       case STRING:
       case IDENTIFIER:
-        this->String = new std::string(*tok.String);
+        this->StringPtr = new std::string(*tok.StringPtr);
         break;
       default:
         break;
@@ -1636,37 +1636,63 @@ public:
   double To<double>() const;
 #endif
 
-  // Token represents punctuation
+  // Token represents PUNCTUATION
   bool IsPunctuation() const noexcept { return this->Type == PUNCTUATION; }
 
-  // Token represents an integer value
-  bool IsLabel() const noexcept { return this->Type == LABEL || this->Type == SCALAR; }
+  // Token is PUNCTUATION and equal to parameter
+  bool IsPunctuation(const char c) const noexcept
+  {
+    return this->Type == PUNCTUATION && c == this->Char;
+  }
+
+  // Token represents an LABEL (integer) value
+  bool IsLabel() const noexcept { return this->Type == LABEL; }
+
+  // Token is LABEL (integer) value and equal to parameter
+  bool IsLabel(const vtkTypeInt64 val) const noexcept
+  {
+    return this->Type == LABEL && val == this->Int;
+  }
+
+  // Token represents a SCALAR (floating-point) value
+  bool IsScalar() const noexcept { return this->Type == SCALAR; }
 
   // Token represents a numerical value
   bool IsNumeric() const noexcept { return this->Type == LABEL || this->Type == SCALAR; }
 
+  // Token is STRING
+  bool IsString() const noexcept { return this->Type == STRING; }
+
+  // Token is STRING and equal to parameter
+  bool IsString(const std::string& str) const
+  {
+    return this->Type == STRING && str == *this->StringPtr;
+  }
+
+  // Token represents string content
+  bool IsStringType() const noexcept { return this->Type == STRING || this->Type == IDENTIFIER; }
+
+  // Integer value from LABEL token without checks
   vtkTypeInt64 ToInt() const noexcept { return this->Int; }
 
   // Mostly the same as To<float>, with additional check
-  float ToFloat() const
+  float ToFloat() const noexcept
   {
     return this->Type == LABEL ? static_cast<float>(this->Int)
                                : this->Type == SCALAR ? static_cast<float>(this->Double) : 0.0F;
   }
 
   // Mostly the same as To<double>, with additional check
-  double ToDouble() const
+  double ToDouble() const noexcept
   {
     return this->Type == LABEL ? static_cast<double>(this->Int)
                                : this->Type == SCALAR ? this->Double : 0.0;
   }
 
-  // Token represents string content
-  bool IsStringType() const noexcept { return this->Type == STRING || this->Type == IDENTIFIER; }
-
-  std::string ToString() const { return *this->String; }
-  std::string ToIdentifier() const { return *this->String; }
+  std::string ToString() const { return *this->StringPtr; }
+  std::string ToIdentifier() const { return *this->StringPtr; }
 
+  // Clear token and set to be ERROR.
   void SetBad()
   {
     this->Clear();
@@ -1678,49 +1704,49 @@ public:
     this->Type = IDENTIFIER;
   }
 
-  void operator=(const char value)
+  void operator=(const char c)
   {
     this->Clear();
     this->Type = PUNCTUATION;
-    this->Char = value;
+    this->Char = c;
   }
-  void operator=(const vtkTypeInt32 value)
+  void operator=(const vtkTypeInt32 val)
   {
     this->Clear();
+    this->Type = LABEL;
+    this->Int = static_cast<vtkTypeInt32>(val);
     if (this->IsLabel64())
     {
-      vtkGenericWarningMacro("Assigning int32 label to int64");
+      vtkGenericWarningMacro("Assigned int32 to int64 label");
     }
-    this->Type = LABEL;
-    this->Int = static_cast<vtkTypeInt32>(value);
   }
-  void operator=(const vtkTypeInt64 value)
+  void operator=(const vtkTypeInt64 val)
   {
     this->Clear();
+    this->Type = LABEL;
+    this->Int = val;
     if (!this->IsLabel64())
     {
-      vtkGenericWarningMacro("Assigning int64 label to int32 - may lose precision");
+      vtkGenericWarningMacro("Assigned int64 to int32 label - may lose precision");
     }
-    this->Type = LABEL;
-    this->Int = value;
   }
-  void operator=(const double value)
+  void operator=(const double val)
   {
     this->Clear();
     this->Type = SCALAR;
-    this->Double = value;
+    this->Double = val;
   }
-  void operator=(const char* value)
+  void operator=(const char* str)
   {
     this->Clear();
     this->Type = STRING;
-    this->String = new std::string(value);
+    this->StringPtr = new std::string(str);
   }
-  void operator=(const std::string& value)
+  void operator=(const std::string& str)
   {
     this->Clear();
     this->Type = STRING;
-    this->String = new std::string(value);
+    this->StringPtr = new std::string(str);
   }
   vtkFoamToken& operator=(const vtkFoamToken& tok)
   {
@@ -1730,27 +1756,12 @@ public:
     this->AssignData(tok);
     return *this;
   }
-  bool operator==(const char value) const
-  {
-    return this->Type == PUNCTUATION && this->Char == value;
-  }
-  bool operator==(const vtkTypeInt32 value) const
-  {
-    return this->Type == LABEL && this->Int == static_cast<vtkTypeInt64>(value);
-  }
-  bool operator==(const vtkTypeInt64 value) const
-  {
-    return this->Type == LABEL && this->Int == value;
-  }
-  bool operator==(const std::string& value) const
-  {
-    return this->Type == STRING && *this->String == value;
-  }
-  bool operator!=(const std::string& value) const
-  {
-    return this->Type != STRING || *this->String != value;
-  }
-  bool operator!=(const char value) const { return !this->operator==(value); }
+  bool operator==(const char c) const noexcept { return this->IsPunctuation(c); }
+  bool operator!=(const char c) const noexcept { return !this->IsPunctuation(c); }
+  bool operator==(const vtkTypeInt32 val) const { return this->IsLabel(val); }
+  bool operator==(const vtkTypeInt64 val) const { return this->IsLabel(val); }
+  bool operator==(const std::string& str) const { return this->IsString(str); }
+  bool operator!=(const std::string& str) const { return !this->IsString(str); }
 
   friend std::ostringstream& operator<<(std::ostringstream& os, const vtkFoamToken& tok)
   {
@@ -1777,7 +1788,7 @@ public:
         break;
       case STRING:
       case IDENTIFIER:
-        os << *(tok.String);
+        os << *(tok.StringPtr);
         break;
       default:
         break;
@@ -2689,6 +2700,7 @@ public:
         return this->Read(token);
       }
       default:
+      {
         // parses as a word token, but gives the STRING type for simplicity
         int inBrace = 0;
         do
@@ -2709,6 +2721,7 @@ public:
         buf[charI] = '\0';
         token = buf;
         this->PutBack(c);
+      }
     }
 
     if (c == EOF)
@@ -2807,6 +2820,9 @@ public:
   double ReadDoubleValue();
 };
 
+//------------------------------------------------------------------------------
+// Code: vtkFoamFile
+
 int vtkFoamFile::ReadNext()
 {
   if (!this->InflateNext(this->Superclass::Outbuf + 1, VTK_FOAMFILE_OUTBUFSIZE))
@@ -3126,7 +3142,7 @@ bool vtkFoamFile::InflateNext(unsigned char* buf, size_t requestSize, vtkTypeInt
 // get next semantically valid character
 int vtkFoamFile::NextTokenHead()
 {
-  for (;;)
+  while (true)
   {
     int c;
     while (isspace(c = this->Getc())) // isspace() accepts -1 as EOF
@@ -3156,7 +3172,7 @@ int vtkFoamFile::NextTokenHead()
       }
       else if (c == '*')
       {
-        for (;;)
+        while (true)
         {
           while ((c = this->Getc()) != EOF && c != '*')
           {
@@ -3192,6 +3208,59 @@ int vtkFoamFile::NextTokenHead()
 #endif
 }
 
+//------------------------------------------------------------------------------
+// class vtkFoamDict
+// A class to holds a FoamFile data structure
+struct vtkFoamDict : public std::vector<vtkFoamEntry*>
+{
+private:
+  typedef std::vector<vtkFoamEntry*> Superclass;
+
+  vtkFoamToken Token;
+  const vtkFoamDict* UpperDictPtr;
+
+  vtkFoamDict(const vtkFoamDict&) = delete;
+
+public:
+  // Default construct with given parent directory
+  explicit vtkFoamDict(const vtkFoamDict* upperDictPtr = nullptr)
+    : UpperDictPtr(upperDictPtr)
+  {
+  }
+  // Copy construct with given parent directory
+  vtkFoamDict(const vtkFoamDict& dict, const vtkFoamDict* upperDictPtr);
+
+  // Destructor - delete list elements if held by the dictionary
+  ~vtkFoamDict();
+
+  // Remove top element, deleting its pointer
+  void remove_back();
+
+  void SetStreamOption(const vtkFoamStreamOption& opt) { this->Token.SetStreamOption(opt); }
+  bool IsLabel64() const { return this->Token.IsLabel64(); } // convenience
+
+  const vtkFoamToken& GetToken() const { return this->Token; }
+  const vtkFoamDict* GetUpperDictPtr() const { return this->UpperDictPtr; }
+
+  vtkFoamToken::tokenType GetType() const
+  {
+    return (this->Token.GetType() == vtkFoamToken::UNDEFINED ? vtkFoamToken::DICTIONARY
+                                                             : this->Token.GetType());
+  }
+
+  // Return list of keywords - table of contents
+  std::vector<std::string> Toc() const;
+
+  // Search dictionary for specified keyword. Return nullptr on failure.
+  vtkFoamEntry* Lookup(const std::string& keyword, bool isPattern = false) const;
+
+  // Reads a FoamFile or a subdictionary.
+  // If the stream to be read is a subdictionary,
+  // the preceding '{' is assumed to have already been discarded.
+  bool Read(
+    vtkFoamIOobject& io, bool isSubDict = false, const vtkFoamToken& firstKeyword = vtkFoamToken());
+};
+
 //------------------------------------------------------------------------------
 // class vtkFoamIOobject
 // Extends vtkFoamFile with OpenFOAM class/object information
@@ -3590,10 +3659,10 @@ public:
   {
     this->Clear();
     this->IsUniformEntry = false;
-    this->Superclass::Type = EMPTYLIST;
+    this->Superclass::Type = vtkFoamToken::EMPTYLIST;
   }
   bool IsUniform() const noexcept { return this->IsUniformEntry; }
-  int Read(vtkFoamIOobject& io);
+  bool Read(vtkFoamIOobject& io);
   void ReadDictionary(vtkFoamIOobject& io, const vtkFoamToken& firstKeyword);
 
   const vtkDataArray& LabelList() const { return *this->Superclass::LabelListPtr; }
@@ -3640,34 +3709,31 @@ public:
     return this->Superclass::Type == LABEL ? this->Superclass::To<vtkTypeInt64>() : 0;
   }
 
-  // the following two are for an exceptional expression of
-  // `LABEL{LABELorSCALAR}' without type prefix (e. g. `2{-0}' in
-  // mixedRhoE B.C. in rhopSonicFoam/shockTube)
-  void MakeLabelList(const vtkTypeInt64 labelValue, const vtkIdType size)
+  void MakeLabelList(const vtkIdType len, const vtkTypeInt64 val = 0)
   {
-    this->Superclass::Type = LABELLIST;
+    this->Superclass::Type = vtkFoamToken::LABELLIST;
     if (this->IsLabel64())
     {
       auto* array = vtkTypeInt64Array::New();
-      array->SetNumberOfValues(size);
-      array->FillValue(labelValue);
+      array->SetNumberOfValues(len);
+      array->FillValue(val);
       this->Superclass::LabelListPtr = array;
     }
     else
     {
       auto* array = vtkTypeInt32Array::New();
-      array->SetNumberOfValues(size);
-      array->FillValue(static_cast<vtkTypeInt32>(labelValue));
+      array->SetNumberOfValues(len);
+      array->FillValue(static_cast<vtkTypeInt32>(val));
       this->Superclass::LabelListPtr = array;
     }
   }
 
-  void MakeScalarList(const float scalarValue, const vtkIdType size)
+  void MakeScalarList(const vtkIdType len, const float val = 0.0f)
   {
-    this->Superclass::Type = SCALARLIST;
+    this->Superclass::Type = vtkFoamToken::SCALARLIST;
     this->Superclass::ScalarListPtr = vtkFloatArray::New();
-    this->Superclass::ScalarListPtr->SetNumberOfValues(size);
-    this->Superclass::ScalarListPtr->FillValue(scalarValue);
+    this->Superclass::ScalarListPtr->SetNumberOfValues(len);
+    this->Superclass::ScalarListPtr->FillValue(val);
   }
 
   // Read dimensions set (always ASCII). The leading '[' has already been removed before calling.
@@ -3679,7 +3745,7 @@ public:
   void ReadDimensionSet(vtkFoamIOobject& io)
   {
     const int nDimensions = 7; // There are 7 base dimensions
-    this->MakeScalarList(0.0, nDimensions);
+    this->MakeScalarList(nDimensions, 0.0);
     vtkFloatArray& dims = *(this->Superclass::ScalarListPtr);
 
     // Read using tokenizer to handle scalar/label, variable lengths, and ignore human-readable
@@ -3779,7 +3845,7 @@ public:
       // Initial guess for list length
       this->LabelListListPtr->ResizeExact(listLen, 4 * listLen);
 
-      this->Superclass::Type = LABELLISTLIST;
+      this->Superclass::Type = vtkFoamToken::LABELLISTLIST;
       io.ReadExpecting('(');
       vtkIdType nTotalElems = 0;
       for (vtkTypeInt64 idx = 0; idx < listLen; ++idx)
@@ -3873,7 +3939,7 @@ public:
     {
       this->LabelListListPtr = new vtkFoamLabelListList32;
     }
-    this->Superclass::Type = LABELLISTLIST;
+    this->Superclass::Type = vtkFoamToken::LABELLISTLIST;
     for (int arrayI = 0; arrayI < 2; arrayI++)
     {
       vtkFoamToken currToken;
@@ -3938,6 +4004,9 @@ public:
   }
 };
 
+//------------------------------------------------------------------------------
+// Code: vtkFoamEntryValue
+
 // generic reader for nonuniform lists. requires size prefix of the
 // list to be present in the stream if the format is binary.
 template <vtkFoamToken::tokenType listType, typename traitsT>
@@ -4188,326 +4257,298 @@ public:
 };
 
 //------------------------------------------------------------------------------
-// class vtkFoamDict
-// a class that holds a FoamFile data structure
-struct vtkFoamDict : public std::vector<vtkFoamEntry*>
-{
-private:
-  typedef std::vector<vtkFoamEntry*> Superclass;
+// Code: vtkFoamDict
 
-  vtkFoamToken Token;
-  const vtkFoamDict* UpperDictPtr;
-
-  vtkFoamDict(const vtkFoamDict&) = delete;
-
-public:
-  explicit vtkFoamDict(const vtkFoamDict* upperDictPtr = nullptr)
-    : UpperDictPtr(upperDictPtr)
-  {
-  }
-  vtkFoamDict(const vtkFoamDict& dict, const vtkFoamDict* upperDictPtr)
-    : Superclass(dict.size())
-    , UpperDictPtr(upperDictPtr)
+// Copy construct
+vtkFoamDict::vtkFoamDict(const vtkFoamDict& dict, const vtkFoamDict* upperDictPtr)
+  : Superclass(dict.size())
+  , UpperDictPtr(upperDictPtr)
+{
+  if (dict.GetType() == vtkFoamToken::DICTIONARY)
   {
-    if (dict.GetType() == vtkFoamToken::DICTIONARY)
-    {
-      for (size_t i = 0; i < dict.size(); ++i)
-      {
-        (*this)[i] = new vtkFoamEntry(*dict[i], this);
-      }
-    }
-    else
+    for (size_t i = 0; i < dict.size(); ++i)
     {
-      Superclass::assign(dict.size(), nullptr);
+      (*this)[i] = new vtkFoamEntry(*dict[i], this);
     }
   }
-
-  ~vtkFoamDict()
+  else
   {
-    if (this->Token.GetType() == vtkFoamToken::UNDEFINED)
-    {
-      for (auto* ptr : *this)
-      {
-        delete ptr;
-      }
-    }
+    Superclass::assign(dict.size(), nullptr);
   }
+}
 
-  // Remove top element, deleting its pointer
-  void remove_back()
+// Destructor
+vtkFoamDict::~vtkFoamDict()
+{
+  if (this->Token.GetType() == vtkFoamToken::UNDEFINED)
   {
-    if (!Superclass::empty())
+    for (auto* ptr : *this)
     {
-      delete Superclass::back();
-      Superclass::pop_back();
+      delete ptr;
     }
   }
+}
 
-  void SetStreamOption(const vtkFoamStreamOption& opt) { this->Token.SetStreamOption(opt); }
-  bool IsLabel64() const { return this->Token.IsLabel64(); } // convenience
-
-  vtkFoamToken::tokenType GetType() const
+// Remove top element, deleting its pointer
+void vtkFoamDict::remove_back()
+{
+  if (!Superclass::empty())
   {
-    return (this->Token.GetType() == vtkFoamToken::UNDEFINED ? vtkFoamToken::DICTIONARY
-                                                             : this->Token.GetType());
+    delete Superclass::back();
+    Superclass::pop_back();
   }
+}
 
-  const vtkFoamToken& GetToken() const { return this->Token; }
-  const vtkFoamDict* GetUpperDictPtr() const { return this->UpperDictPtr; }
-
-  // Return list of keywords - table of contents
-  std::vector<std::string> Toc() const
+// Return list of keywords - table of contents
+std::vector<std::string> vtkFoamDict::Toc() const
+{
+  std::vector<std::string> list;
+  list.reserve(this->size());
+  for (const vtkFoamEntry* eptr : *this)
   {
-    std::vector<std::string> list;
-    list.reserve(this->size());
-    for (const vtkFoamEntry* eptr : *this)
+    const std::string& key = eptr->GetKeyword();
+    if (!key.empty()) // should not really happen anyhow
     {
-      const std::string& key = eptr->GetKeyword();
-      if (!key.empty()) // should not really happen anyhow
-      {
-        list.push_back(key);
-      }
+      list.push_back(key);
     }
-    return list;
   }
+  return list;
+}
 
-  vtkFoamEntry* Lookup(const std::string& keyword, bool regex = false) const
+// Search dictionary for specified keyword. Return nullptr on failure.
+vtkFoamEntry* vtkFoamDict::Lookup(const std::string& keyword, const bool isPattern) const
+{
+  if (this->Token.GetType() == vtkFoamToken::UNDEFINED)
   {
-    if (this->Token.GetType() == vtkFoamToken::UNDEFINED)
+    int lastMatch = -1;
+    for (size_t i = 0; i < this->Superclass::size(); i++)
     {
-      int lastMatch = -1;
-      for (size_t i = 0; i < this->Superclass::size(); i++)
+      const std::string& key = this->operator[](i)->GetKeyword();
+      vtksys::RegularExpression rex;
+      if (key == keyword) // found
       {
-        const std::string& key = this->operator[](i)->GetKeyword();
-        vtksys::RegularExpression rex;
-        if (key == keyword) // found
-        {
-          return this->operator[](i);
-        }
-        else if (regex && rex.compile(key) && rex.find(keyword) && rex.start(0) == 0 &&
-          rex.end(0) == keyword.size())
-        {
-          // regular expression matches full keyword
-          lastMatch = static_cast<int>(i);
-        }
+        return this->operator[](i);
       }
-      if (lastMatch >= 0)
+      else if (isPattern && rex.compile(key) && rex.find(keyword) && rex.start(0) == 0 &&
+        rex.end(0) == keyword.size())
       {
-        return this->operator[](lastMatch);
+        // regular expression matches full keyword
+        lastMatch = static_cast<int>(i);
       }
     }
-
-    // Not found
-    return nullptr;
+    if (lastMatch >= 0)
+    {
+      return this->operator[](lastMatch);
+    }
   }
 
-  // reads a FoamFile or a subdictionary. if the stream to be read is
-  // a subdictionary the preceding '{' is assumed to have already been
-  // thrown away.
-  bool Read(vtkFoamIOobject& io, const bool isSubDictionary = false,
-    const vtkFoamToken& firstToken = vtkFoamToken())
+  // Not found
+  return nullptr;
+}
+
+// Reads a FoamFile or a subdictionary.
+// If the stream to be read is a subdictionary,
+// the preceding '{' is assumed to have already been discarded.
+bool vtkFoamDict::Read(vtkFoamIOobject& io, const bool isSubDict, const vtkFoamToken& firstKeyword)
+{
+  try
   {
     vtkFoamToken currToken;
     currToken.SetStreamOption(io);
-    try
+
+    if (firstKeyword.GetType() == vtkFoamToken::UNDEFINED)
     {
-      if (firstToken.GetType() == vtkFoamToken::UNDEFINED)
+      // read the first token
+      if (!io.Read(currToken))
       {
-        // read the first token
-        if (!io.Read(currToken))
+        throw vtkFoamError() << "Unexpected EOF";
+      }
+
+      if (isSubDict)
+      {
+        // the following if clause is for an exceptional expression
+        // of `LABEL{numeric}' without type prefix
+        // (e. g. `2{-0}' in mixedRhoE B.C. in
+        // rhopSonicFoam/shockTube)
+        if (currToken.IsNumeric())
         {
-          throw vtkFoamError() << "Unexpected EOF";
+          this->Token = currToken;
+          io.ReadExpecting('}');
+          return true;
         }
 
-        if (isSubDictionary)
+        // return as empty dictionary
+        else if (currToken == '}')
         {
-          // the following if clause is for an exceptional expression
-          // of `LABEL{numeric}' without type prefix
-          // (e. g. `2{-0}' in mixedRhoE B.C. in
-          // rhopSonicFoam/shockTube)
-          if (currToken.IsNumeric())
+          return true;
+        }
+      }
+      else
+      {
+        // list of dictionaries is read as a usual dictionary
+        // polyMesh/boundary, point/face/cell-Zones
+        if (currToken.IsLabel())
+        {
+          io.ReadExpecting('(');
+          if (currToken.To<vtkTypeInt64>() > 0)
           {
-            this->Token = currToken;
-            io.ReadExpecting('}');
-            return true;
+            if (!io.Read(currToken))
+            {
+              throw vtkFoamError() << "Unexpected EOF";
+            }
+            // continue to read as a usual dictionary
           }
-          // return as empty dictionary
-
-          else if (currToken == '}')
+          else // return as empty dictionary
           {
+            io.ReadExpecting(')');
             return true;
           }
         }
-        else
+        // some boundary files does not have the number of boundary
+        // patches (e.g. settlingFoam/tank3D). in this case we need to
+        // explicitly read the file as a dictionary.
+
+        else if (currToken == '(' && io.GetClassName() == "polyBoundaryMesh") // polyMesh/boundary
         {
-          // list of dictionaries is read as a usual dictionary
-          // polyMesh/boundary, point/face/cell-Zones
-          if (currToken.IsLabel())
+          if (!io.Read(currToken)) // read the first keyword
           {
-            io.ReadExpecting('(');
-            if (currToken.To<vtkTypeInt64>() > 0)
-            {
-              if (!io.Read(currToken))
-              {
-                throw vtkFoamError() << "Unexpected EOF";
-              }
-              // continue to read as a usual dictionary
-            }
-            else // return as empty dictionary
-
-            {
-              io.ReadExpecting(')');
-              return true;
-            }
+            throw vtkFoamError() << "Unexpected EOF";
           }
-          // some boundary files does not have the number of boundary
-          // patches (e.g. settlingFoam/tank3D). in this case we need to
-          // explicitly read the file as a dictionary.
-
-          else if (currToken == '(' && io.GetClassName() == "polyBoundaryMesh") // polyMesh/boundary
 
+          if (currToken == ')') // return as empty dictionary
           {
-            if (!io.Read(currToken)) // read the first keyword
-
-            {
-              throw vtkFoamError() << "Unexpected EOF";
-            }
-            if (currToken == ')') // return as empty dictionary
-
-            {
-              return true;
-            }
+            return true;
           }
         }
       }
-      // if firstToken is given as string read the following stream as
-      // subdictionary
-
-      else if (firstToken.GetType() == vtkFoamToken::STRING)
-      {
-        this->Superclass::push_back(new vtkFoamEntry(this));
-        this->Superclass::back()->SetKeyword(firstToken.ToString());
-        this->Superclass::back()->ReadDictionary(io);
-        if (!io.Read(currToken) || currToken == '}' || currToken == ')')
-        {
-          return true;
-        }
-      }
-      else // quite likely an identifier
+    }
+    // if firstKeyword is given as string read the following stream as
+    // subdictionary
 
+    else if (firstKeyword.GetType() == vtkFoamToken::STRING)
+    {
+      this->Superclass::push_back(new vtkFoamEntry(this));
+      this->Superclass::back()->SetKeyword(firstKeyword.ToString());
+      this->Superclass::back()->ReadDictionary(io);
+      if (!io.Read(currToken) || currToken == '}' || currToken == ')')
       {
-        currToken = firstToken;
+        return true;
       }
+    }
+    else // quite likely an identifier
+    {
+      currToken = firstKeyword;
+    }
 
-      if (currToken == ';' || currToken.IsStringType())
+    if (currToken == ';' || currToken.IsStringType())
+    {
+      // general dictionary
+      do
       {
-        // general dictionary
-        do
+        if (currToken.GetType() == vtkFoamToken::STRING)
         {
-          if (currToken.GetType() == vtkFoamToken::STRING)
+          vtkFoamEntry* previousEntry = this->Lookup(currToken.ToString());
+          if (previousEntry != nullptr)
           {
-            vtkFoamEntry* previousEntry = this->Lookup(currToken.ToString());
-            if (previousEntry != nullptr)
+            if (io.GetInputMode() == vtkFoamFile::INPUT_MODE_MERGE)
             {
-              if (io.GetInputMode() == vtkFoamFile::INPUT_MODE_MERGE)
+              if (previousEntry->FirstValue().GetType() == vtkFoamToken::DICTIONARY)
               {
-                if (previousEntry->FirstValue().GetType() == vtkFoamToken::DICTIONARY)
-                {
-                  io.ReadExpecting('{');
-                  previousEntry->FirstValue().Dictionary().Read(io, true);
-                }
-                else
-                {
-                  previousEntry->Clear();
-                  previousEntry->Read(io);
-                }
+                io.ReadExpecting('{');
+                previousEntry->FirstValue().Dictionary().Read(io, true); // Read as sub-dict
               }
-              else if (io.GetInputMode() == vtkFoamFile::INPUT_MODE_OVERWRITE)
+              else
               {
                 previousEntry->Clear();
                 previousEntry->Read(io);
               }
-              else // INPUT_MODE_ERROR
-              {
-                throw vtkFoamError()
-                  << "Found duplicated entries with keyword " << currToken.ToString();
-              }
             }
-            else
+            else if (io.GetInputMode() == vtkFoamFile::INPUT_MODE_OVERWRITE)
             {
-              this->Superclass::push_back(new vtkFoamEntry(this));
-              this->Superclass::back()->SetKeyword(currToken.ToString());
-              this->Superclass::back()->Read(io);
+              previousEntry->Clear();
+              previousEntry->Read(io);
             }
-
-            if (currToken == "FoamFile")
+            else // INPUT_MODE_ERROR
             {
-              // Drop the FoamFile header subdictionary entry
-              this->remove_back();
+              throw vtkFoamError()
+                << "Found duplicated entries with keyword " << currToken.ToString();
             }
           }
-          else if (currToken.GetType() == vtkFoamToken::IDENTIFIER)
+          else
           {
-            // substitute identifier
-            const std::string identifier(currToken.ToIdentifier());
+            this->Superclass::push_back(new vtkFoamEntry(this));
+            this->Superclass::back()->SetKeyword(currToken.ToString());
+            this->Superclass::back()->Read(io);
+          }
 
-            for (const vtkFoamDict* uDictPtr = this;;)
-            {
-              const vtkFoamEntry* identifiedEntry = uDictPtr->Lookup(identifier);
+          if (currToken == "FoamFile")
+          {
+            // Drop the FoamFile header subdictionary entry
+            this->remove_back();
+          }
+        }
+        else if (currToken.GetType() == vtkFoamToken::IDENTIFIER)
+        {
+          // substitute identifier
+          const std::string identifier(currToken.ToIdentifier());
 
-              if (identifiedEntry != nullptr)
+          for (const vtkFoamDict* uDictPtr = this;;)
+          {
+            const vtkFoamEntry* identifiedEntry = uDictPtr->Lookup(identifier);
+
+            if (identifiedEntry != nullptr)
+            {
+              if (identifiedEntry->FirstValue().GetType() != vtkFoamToken::DICTIONARY)
               {
-                if (identifiedEntry->FirstValue().GetType() != vtkFoamToken::DICTIONARY)
-                {
-                  throw vtkFoamError()
-                    << "Expected dictionary for substituting entry " << identifier;
-                }
-                const vtkFoamDict& identifiedDict = identifiedEntry->FirstValue().Dictionary();
-                for (size_t entryI = 0; entryI < identifiedDict.size(); entryI++)
-                {
-                  // I think #inputMode handling should be done here
-                  // as well, but the genuine FoamFile parser for OF
-                  // 1.5 does not seem to be doing it.
-                  this->Superclass::push_back(new vtkFoamEntry(*identifiedDict[entryI], this));
-                }
-                break;
+                throw vtkFoamError() << "Expected dictionary for substituting entry " << identifier;
               }
-              else
+              const vtkFoamDict& identifiedDict = identifiedEntry->FirstValue().Dictionary();
+              for (size_t entryI = 0; entryI < identifiedDict.size(); entryI++)
               {
-                uDictPtr = uDictPtr->GetUpperDictPtr();
-                if (uDictPtr == nullptr)
-                {
-                  throw vtkFoamError() << "Substituting entry " << identifier << " not found";
-                }
+                // I think #inputMode handling should be done here
+                // as well, but the genuine FoamFile parser for OF
+                // 1.5 does not seem to be doing it.
+                this->Superclass::push_back(new vtkFoamEntry(*identifiedDict[entryI], this));
+              }
+              break;
+            }
+            else
+            {
+              uDictPtr = uDictPtr->GetUpperDictPtr();
+              if (uDictPtr == nullptr)
+              {
+                throw vtkFoamError() << "Substituting entry " << identifier << " not found";
               }
             }
           }
-          // skip empty entry only with ';'
-        } while (io.Read(currToken) && (currToken.IsStringType() || currToken == ';'));
-
-        if (currToken.GetType() == vtkFoamToken::TOKEN_ERROR || currToken == '}' ||
-          currToken == ')')
-        {
-          return true;
         }
-        throw vtkFoamError() << "Expected keyword, closing brace, ';' or EOF, found " << currToken;
+        // skip empty entry only with ';'
+      } while (io.Read(currToken) && (currToken.IsStringType() || currToken == ';'));
+
+      if (currToken.GetType() == vtkFoamToken::TOKEN_ERROR || currToken == '}' || currToken == ')')
+      {
+        return true;
       }
-      throw vtkFoamError() << "Expected keyword or identifier, found " << currToken;
+      throw vtkFoamError() << "Expected keyword, closing brace, ';' or EOF, found " << currToken;
     }
-    catch (const vtkFoamError& err)
+    throw vtkFoamError() << "Expected keyword or identifier, found " << currToken;
+  }
+  catch (const vtkFoamError& err)
+  {
+    if (isSubDict)
     {
-      if (isSubDictionary)
-      {
-        throw;
-      }
-      else
-      {
-        io.SetError(err);
-        return false;
-      }
+      throw;
+    }
+    else
+    {
+      io.SetError(err);
+      return false;
     }
   }
-};
+}
+
+//------------------------------------------------------------------------------
+// Code: vtkFoamIOobject
 
 void vtkFoamIOobject::ReadHeader()
 {
@@ -4516,19 +4557,32 @@ void vtkFoamIOobject::ReadHeader()
 
   vtkFoamDict headerDict;
   headerDict.SetStreamOption(this->GetStreamOption());
-  headerDict.Read(*this, true, vtkFoamToken()); // Throw exception in case of error
+  headerDict.Read(*this, true); // Read as sub-dict. Throw exception in case of error
 
   const vtkFoamEntry* eptr;
 
+  // Essentials
+  if ((eptr = headerDict.Lookup("class")) == nullptr)
+  {
+    throw vtkFoamError() << "No 'class' in FoamFile header";
+  }
+  this->headerClassName_ = eptr->ToString();
+
+  if ((eptr = headerDict.Lookup("object")) == nullptr)
+  {
+    throw vtkFoamError() << "No 'object' in FoamFile header";
+  }
+  this->objectName_ = eptr->ToString();
+
   if ((eptr = headerDict.Lookup("format")) == nullptr)
   {
+    // Note (2021-03-19): may make this optional in the future, defaulting to ascii
     throw vtkFoamError() << "No 'format' (ascii|binary) in FoamFile header";
   }
   this->SetBinaryFormat("binary" == eptr->ToString()); // case sensitive
 
-  // Newer files have 'arch' entry with "label=(32|64) scalar=(32|64)"
-  // If this entry does not exist, or is incomplete, use the fallback values
-  // that come from the reader (defined in constructor and Close)
+  // The arch entry has "label=(32|64) scalar=(32|64)"
+  // If missing/incomplete, use fallback values from reader (defined in constructor and Close)
   if ((eptr = headerDict.Lookup("arch")) != nullptr)
   {
     const std::string archValue(eptr->ToString());
@@ -4567,20 +4621,11 @@ void vtkFoamIOobject::ReadHeader()
       }
     }
   }
-
-  if ((eptr = headerDict.Lookup("class")) == nullptr)
-  {
-    throw vtkFoamError() << "No 'class' in FoamFile header";
-  }
-  this->headerClassName_ = eptr->ToString();
-
-  if ((eptr = headerDict.Lookup("object")) == nullptr)
-  {
-    throw vtkFoamError() << "No 'object' in FoamFile header";
-  }
-  this->objectName_ = eptr->ToString();
 }
 
+//------------------------------------------------------------------------------
+// Code: vtkFoamEntryValue
+
 vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntry* parent)
   : vtkFoamToken(value)
   , IsUniformEntry(value.IsUniform())
@@ -4594,10 +4639,13 @@ vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntr
     case SCALARLIST:
     case VECTORLIST:
     case STRINGLIST:
+    {
       this->Superclass::VtkObjectPtr = value.ToVTKObject();
       this->Superclass::VtkObjectPtr->Register(nullptr);
       break;
+    }
     case LABELLISTLIST:
+    {
       if (value.LabelListListPtr->IsLabel64())
       {
         this->LabelListListPtr = new vtkFoamLabelListList64(*value.LabelListListPtr);
@@ -4607,6 +4655,7 @@ vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntr
         this->LabelListListPtr = new vtkFoamLabelListList32(*value.LabelListListPtr);
       }
       break;
+    }
     case ENTRYVALUELIST:
     {
       const size_t nValues = value.EntryValuePtrs->size();
@@ -4616,9 +4665,10 @@ vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntr
         this->EntryValuePtrs->operator[](valueI) =
           new vtkFoamEntryValue(*value.EntryValuePtrs->operator[](valueI), this->UpperEntryPtr);
       }
+      break;
     }
-    break;
     case DICTIONARY:
+    {
       // UpperEntryPtr is null when called from vtkFoamDict constructor
       if (this->UpperEntryPtr == nullptr)
       {
@@ -4630,15 +4680,7 @@ vtkFoamEntryValue::vtkFoamEntryValue(vtkFoamEntryValue& value, const vtkFoamEntr
         this->DictPtr->SetStreamOption(value.GetStreamOption());
       }
       break;
-    case EMPTYLIST:
-      break;
-    case UNDEFINED:
-    case PUNCTUATION:
-    case LABEL:
-    case SCALAR:
-    case STRING:
-    case IDENTIFIER:
-    case TOKEN_ERROR:
+    }
     default:
       break;
   }
@@ -4666,14 +4708,6 @@ void vtkFoamEntryValue::Clear()
       case DICTIONARY:
         delete this->DictPtr;
         break;
-      case UNDEFINED:
-      case PUNCTUATION:
-      case LABEL:
-      case SCALAR:
-      case STRING:
-      case IDENTIFIER:
-      case TOKEN_ERROR:
-      case EMPTYLIST:
       default:
         break;
     }
@@ -4694,9 +4728,9 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
   currToken.SetStreamOption(io);
   io.Read(currToken);
 
-  // initial guess of the list type
   if (currToken.IsLabel())
   {
+    // Use lookahead to guess the list type.
     // if the first token is of type LABEL it might be either an element of
     // a labelList or the size of a sublist so proceed to the next token
     vtkFoamToken nextToken;
@@ -4705,8 +4739,25 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
     {
       throw vtkFoamError() << "Unexpected EOF";
     }
-    if (nextToken.IsLabel())
+
+    if (nextToken.IsPunctuation('('))
+    {
+      // A List of List: read recursively
+      this->Superclass::EntryValuePtrs = new vtkFoamPtrList<vtkFoamEntryValue>;
+      this->Superclass::EntryValuePtrs->push_back(new vtkFoamEntryValue(this->UpperEntryPtr));
+      this->Superclass::EntryValuePtrs->back()->SetStreamOption(*this);
+      this->Superclass::EntryValuePtrs->back()->ReadList(io);
+      this->Superclass::Type = vtkFoamToken::ENTRYVALUELIST;
+    }
+    else if (nextToken.IsPunctuation(')'))
     {
+      // List with only one label element. Eg "(5)"
+      this->MakeLabelList(1, currToken.To<vtkTypeInt64>());
+      return; // DONE
+    }
+    else if (nextToken.IsLabel())
+    {
+      // Start of a list of labels
       if (this->IsLabel64())
       {
         auto* array = vtkTypeInt64Array::New();
@@ -4721,73 +4772,43 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
         array->InsertNextValue(nextToken.To<vtkTypeInt32>());
         this->Superclass::LabelListPtr = array;
       }
-      this->Superclass::Type = LABELLIST;
+      this->Superclass::Type = vtkFoamToken::LABELLIST;
     }
-    else if (nextToken.GetType() == vtkFoamToken::SCALAR)
+    else if (nextToken.IsScalar())
     {
+      // Start of a list of scalars
       this->Superclass::ScalarListPtr = vtkFloatArray::New();
       this->Superclass::ScalarListPtr->InsertNextValue(currToken.To<float>());
       this->Superclass::ScalarListPtr->InsertNextValue(nextToken.To<float>());
-      this->Superclass::Type = SCALARLIST;
-    }
-    else if (nextToken == '(') // list of list: read recursively
-    {
-      this->Superclass::EntryValuePtrs = new vtkFoamPtrList<vtkFoamEntryValue>;
-      this->Superclass::EntryValuePtrs->push_back(new vtkFoamEntryValue(this->UpperEntryPtr));
-      this->Superclass::EntryValuePtrs->back()->SetStreamOption(*this);
-      this->Superclass::EntryValuePtrs->back()->ReadList(io);
-      this->Superclass::Type = ENTRYVALUELIST;
-    }
-    else if (nextToken == ')') // list with only one label element
-    {
-      if (this->IsLabel64())
-      {
-        auto* array = vtkTypeInt64Array::New();
-        array->SetNumberOfValues(1);
-        array->SetValue(0, currToken.To<vtkTypeInt64>());
-        this->Superclass::LabelListPtr = array;
-      }
-      else
-      {
-        auto* array = vtkTypeInt32Array::New();
-        array->SetNumberOfValues(1);
-        array->SetValue(0, currToken.To<vtkTypeInt32>());
-        this->Superclass::LabelListPtr = array;
-      }
-      this->Superclass::Type = LABELLIST;
-      return;
+      this->Superclass::Type = vtkFoamToken::SCALARLIST;
     }
     else
     {
       throw vtkFoamError() << "Expected number, '(' or ')', found " << nextToken;
     }
   }
-  else if (currToken.GetType() == vtkFoamToken::SCALAR)
+  else if (currToken.IsScalar())
   {
+    // The first element of a scalar list
     this->Superclass::ScalarListPtr = vtkFloatArray::New();
     this->Superclass::ScalarListPtr->InsertNextValue(currToken.To<float>());
-    this->Superclass::Type = SCALARLIST;
+    this->Superclass::Type = vtkFoamToken::SCALARLIST;
   }
-  // if the first word is a string we have to read another token to determine
-  // if the first word is a keyword for the following dictionary
   else if (currToken.GetType() == vtkFoamToken::STRING)
   {
+    // if the first word is a string we have to read another token to determine
+    // if it is a keyword for the following dictionary
+
     vtkFoamToken nextToken;
     nextToken.SetStreamOption(io);
     if (!io.Read(nextToken))
     {
       throw vtkFoamError() << "Unexpected EOF";
     }
-    if (nextToken.GetType() == vtkFoamToken::STRING) // list of strings
-    {
-      this->Superclass::StringListPtr = vtkStringArray::New();
-      this->Superclass::StringListPtr->InsertNextValue(currToken.ToString());
-      this->Superclass::StringListPtr->InsertNextValue(nextToken.ToString());
-      this->Superclass::Type = STRINGLIST;
-    }
-    // dictionary with the already read stringToken as the first keyword
-    else if (nextToken == '{')
+
+    if (nextToken.IsPunctuation('{'))
     {
+      // Dictionary. Use previously read stringToken as the first keyword
       if (currToken.ToString().empty())
       {
         throw "Empty string is invalid as a keyword for dictionary entry";
@@ -4795,24 +4816,32 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
       this->ReadDictionary(io, currToken);
       // the dictionary read as list has the entry terminator ';' so
       // we have to skip it
-      return;
+      return; // DONE
     }
-    else if (nextToken == ')') // list with only one string element
+    else if (nextToken.IsPunctuation(')'))
     {
+      // List with only one string element. Eg "(wall)"
       this->Superclass::StringListPtr = vtkStringArray::New();
       this->Superclass::StringListPtr->SetNumberOfValues(1);
       this->Superclass::StringListPtr->SetValue(0, currToken.ToString());
-      this->Superclass::Type = STRINGLIST;
-      return;
+      this->Superclass::Type = vtkFoamToken::STRINGLIST;
+      return; // DONE
+    }
+    else if (nextToken.GetType() == vtkFoamToken::STRING) // list of strings
+    {
+      this->Superclass::StringListPtr = vtkStringArray::New();
+      this->Superclass::StringListPtr->InsertNextValue(currToken.ToString());
+      this->Superclass::StringListPtr->InsertNextValue(nextToken.ToString());
+      this->Superclass::Type = vtkFoamToken::STRINGLIST;
     }
     else
     {
       throw vtkFoamError() << "Expected string, '{' or ')', found " << nextToken;
     }
   }
-  // list of lists or dictionaries: read recursively
   else if (currToken == '(' || currToken == '{')
   {
+    // List of lists or dictionaries: read recursively
     this->Superclass::EntryValuePtrs = new vtkFoamPtrList<vtkFoamEntryValue>;
     this->Superclass::EntryValuePtrs->push_back(new vtkFoamEntryValue(this->UpperEntryPtr));
     this->Superclass::EntryValuePtrs->back()->SetStreamOption(io);
@@ -4843,19 +4872,20 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
 
     // Drop ')'
     this->Superclass::EntryValuePtrs->remove_back();
-    this->Superclass::Type = ENTRYVALUELIST;
-    return;
+    this->Superclass::Type = vtkFoamToken::ENTRYVALUELIST;
+    return; // DONE
   }
-  else if (currToken == ')') // empty list
+  else if (currToken.IsPunctuation(')'))
   {
-    this->Superclass::Type = EMPTYLIST;
-    return;
+    // Empty list
+    this->Superclass::Type = vtkFoamToken::EMPTYLIST;
+    return; // DONE
   }
   // FIXME: may (or may not) need identifier handling
 
-  while (io.Read(currToken) && currToken != ')')
+  while (io.Read(currToken) && !currToken.IsPunctuation(')'))
   {
-    if (this->Superclass::Type == LABELLIST)
+    if (this->Superclass::Type == vtkFoamToken::LABELLIST)
     {
       if (currToken.GetType() == vtkFoamToken::SCALAR)
       {
@@ -4878,7 +4908,7 @@ void vtkFoamEntryValue::ReadList(vtkFoamIOobject& io)
         // Replace
         labels->Delete();
         this->Superclass::ScalarListPtr = scalars;
-        this->Superclass::Type = SCALARLIST;
+        this->Superclass::Type = vtkFoamToken::SCALARLIST;
       }
       else if (currToken.IsLabel())
       {
@@ -4983,10 +5013,11 @@ void vtkFoamEntryValue::ReadDictionary(vtkFoamIOobject& io, const vtkFoamToken&
   this->Superclass::DictPtr->Read(io, true, firstKeyword);
 }
 
-// guess the type of the given entry value and read it
-// return value: 0 if encountered end of entry (';') during parsing
-// composite entry value, 1 otherwise
-int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
+// Guess the type of the given entry value and read it
+// Return:
+// - true on success
+// - false if end of entry (';') encountered during parsing composite entry value
+bool vtkFoamEntryValue::Read(vtkFoamIOobject& io)
 {
   this->SetStreamOption(io);
 
@@ -4997,27 +5028,26 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
     throw vtkFoamError() << "Unexpected EOF";
   }
 
-  vtkFoamTypes::dataType listDataType(vtkFoamTypes::NO_TYPE);
-
+  // List types
   if (currToken == '{')
   {
     this->ReadDictionary(io, vtkFoamToken());
-    return 1;
+    return true;
   }
-  // for reading sublist from vtkFoamEntryValue::readList() or there
-  // are cases where lists without the (non)uniform keyword appear
-  // (e.g. coodles/pitsDaily/0/U)
   else if (currToken == '(')
   {
     this->ReadList(io);
-    return 1;
+    return true;
   }
   else if (currToken == '[')
   {
     this->ReadDimensionSet(io);
-    return 1;
+    return true;
   }
-  else if (currToken == "uniform")
+
+  vtkFoamTypes::dataType listDataType(vtkFoamTypes::NO_TYPE);
+
+  if (currToken == "uniform")
   {
     if (!io.Read(currToken))
     {
@@ -5030,7 +5060,7 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
     else if (currToken == ';')
     {
       this->Superclass::operator=("uniform");
-      return 0;
+      return false;
     }
     else if (currToken.IsNumeric() || currToken.GetType() == vtkFoamToken::STRING)
     {
@@ -5050,8 +5080,6 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
     }
     this->IsUniformEntry = false;
 
-    listDataType = vtkFoamTypes::NO_TYPE;
-
     if (currToken.GetType() == vtkFoamToken::STRING)
     {
       // List types: "List<label>", "List<scalar>" ...
@@ -5061,7 +5089,7 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
     {
       this->ReadNonUniformList(io, listDataType);
     }
-    else if (currToken.IsLabel() && currToken.To<vtkTypeInt64>() == 0)
+    else if (currToken.IsLabel(0))
     {
       // An empty list doesn't have a list type specifier
       this->Superclass::Type = vtkFoamToken::EMPTYLIST;
@@ -5074,7 +5102,7 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
     else if (currToken == ';')
     {
       this->Superclass::operator=("nonuniform");
-      return 0;
+      return false;
     }
     else
     {
@@ -5092,13 +5120,14 @@ int vtkFoamEntryValue::Read(vtkFoamIOobject& io)
   {
     this->Superclass::operator=(currToken);
   }
-  return 1;
+
+  return true;
 }
 
 // read values of an entry
 void vtkFoamEntry::Read(vtkFoamIOobject& io)
 {
-  for (;;)
+  while (true)
   {
     this->Superclass::push_back(new vtkFoamEntryValue(this));
     this->Superclass::back()->SetStreamOption(io);
@@ -5113,6 +5142,7 @@ void vtkFoamEntry::Read(vtkFoamIOobject& io)
         *this->Superclass::operator[](this->Superclass::size() - 2);
       if (secondLastValue.IsLabel())
       {
+        const vtkTypeInt64 listLen = secondLastValue.To<vtkTypeInt64>();
         vtkFoamEntryValue& lastValue = *this->Superclass::back();
 
         // a zero-sized nonuniform list without prefixing "nonuniform"
@@ -5122,12 +5152,13 @@ void vtkFoamEntry::Read(vtkFoamIOobject& io)
         // vtkFoamEntryValue::read()). still this causes erroneous
         // behavior for `0 nonuniform 0()' but this should be extremely
         // rare
-        if (lastValue.GetType() == vtkFoamToken::EMPTYLIST && secondLastValue == 0)
+        if (lastValue.GetType() == vtkFoamToken::EMPTYLIST && listLen == 0)
         {
           // Remove last value, and mark new last value as EMPTYLIST
           this->remove_back();
           this->Superclass::back()->SetEmptyList();
         }
+
         // for an exceptional expression of `LABEL{LABELorSCALAR}' without
         // type prefix (e. g. `2{-0}' in mixedRhoE B.C. in
         // rhopSonicFoam/shockTube)
@@ -5135,27 +5166,43 @@ void vtkFoamEntry::Read(vtkFoamIOobject& io)
         {
           if (lastValue.Dictionary().GetType() == vtkFoamToken::LABEL)
           {
-            const vtkTypeInt64 asize = secondLastValue.To<vtkTypeInt64>();
-            const vtkTypeInt64 value = lastValue.Dictionary().GetToken().ToInt();
+            const vtkTypeInt64 val = lastValue.Dictionary().GetToken().ToInt();
             // Remove the last two values
             this->remove_back();
             this->remove_back();
             // Make new labelList
             this->Superclass::push_back(new vtkFoamEntryValue(this));
             this->Superclass::back()->SetStreamOption(io);
-            this->Superclass::back()->MakeLabelList(value, asize);
+            this->Superclass::back()->MakeLabelList(listLen, val);
           }
           else if (lastValue.Dictionary().GetType() == vtkFoamToken::SCALAR)
           {
-            const vtkTypeInt64 asize = secondLastValue.To<vtkTypeInt64>();
-            const float value = lastValue.Dictionary().GetToken().ToFloat();
+            const float val = lastValue.Dictionary().GetToken().ToFloat();
             // Remove the last two values
             this->remove_back();
             this->remove_back();
             // Make new scalarList
             this->Superclass::push_back(new vtkFoamEntryValue(this));
             this->Superclass::back()->SetStreamOption(io);
-            this->Superclass::back()->MakeScalarList(value, asize);
+            this->Superclass::back()->MakeScalarList(listLen, val);
+          }
+        }
+
+        // Cleanup for tokenized string lists, the parser will handle something like
+        //
+        //     keyword  2(abc def);
+        //
+        // as  LABEL + STRINGLIST : so drop the label when the sizes are identical
+        // limit the fixup to entries that contains no other tokens (2021-03-19)
+        else if (lastValue.GetType() == vtkFoamToken::STRINGLIST)
+        {
+          if (listLen == lastValue.StringList().GetNumberOfValues() &&
+            this->Superclass::size() == 2)
+          {
+            // The label (list size parsing remnant) can be removed.
+            std::swap(this->Superclass::operator[](this->Superclass::size() - 1),
+              this->Superclass::operator[](this->Superclass::size() - 2));
+            this->remove_back();
           }
         }
       }
@@ -5193,6 +5240,7 @@ void vtkFoamEntry::Read(vtkFoamIOobject& io)
     }
     else if (*this->Superclass::back() == ';')
     {
+      // Drop entry terminator
       this->remove_back();
       break;
     }
@@ -9686,8 +9734,7 @@ bool vtkOpenFOAMReaderPrivate::GetCellZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     vtkNew<zoneVtkType> zm;
 
     // Some OpenFOAM versions write an empty list as zero label only (in binary)
-    if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
-      (labelsEntry.IsLabel() && labelsEntry.ToInt() == 0))
+    if (labelsEntry.GetType() == vtkFoamToken::EMPTYLIST || labelsEntry.IsLabel(0))
     {
       // For empty list - store empty mesh (for proper block ordering)
       ::SetBlock(zoneMesh, zonei, zm, zoneName);
@@ -9819,8 +9866,7 @@ bool vtkOpenFOAMReaderPrivate::GetFaceZoneMesh(
     vtkNew<zoneVtkType> zm;
 
     // Some OpenFOAM versions write an empty list as zero label only (in binary)
-    if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
-      (labelsEntry.IsLabel() && labelsEntry.ToInt() == 0))
+    if (labelsEntry.GetType() == vtkFoamToken::EMPTYLIST || labelsEntry.IsLabel(0))
     {
       // For empty list - store empty mesh (for proper block ordering)
       ::SetBlock(zoneMesh, zonei, zm, zoneName);
@@ -9958,8 +10004,7 @@ bool vtkOpenFOAMReaderPrivate::GetPointZoneMesh(vtkMultiBlockDataSet* zoneMesh,
     vtkNew<zoneVtkType> zm;
 
     // Some OpenFOAM versions write an empty list as zero label only (in binary)
-    if ((labelsEntry.GetType() == vtkFoamToken::EMPTYLIST) ||
-      (labelsEntry.IsLabel() && labelsEntry.ToInt() == 0))
+    if (labelsEntry.GetType() == vtkFoamToken::EMPTYLIST || labelsEntry.IsLabel(0))
     {
       // For empty list - store empty mesh (for proper block ordering)
       ::SetBlock(zoneMesh, zonei, zm, zoneName);
-- 
GitLab


From 017f7c128e977bc60c54558d01d3ce1382a729fb Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 19 Mar 2021 18:12:08 +0100
Subject: [PATCH 24/36] openfoam: restructure read-helpers

- move heavier parts from vtkFoamEntryValue into vtkFoamRead struct.
  Move list readers out of line for easier maintenance.

- Ensure old (extra data) lagrangian/positions properly skips
  unneed elements in ASCII as well.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 751 ++++++++++++++++--------------
 1 file changed, 404 insertions(+), 347 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index 5fcb7cdd28c..b73fe246522 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -1797,6 +1797,9 @@ public:
   }
 };
 
+//------------------------------------------------------------------------------
+// Specializations for vtkFoamToken
+
 template <>
 inline bool vtkFoamToken::Is<vtkTypeInt8>() const
 {
@@ -3420,38 +3423,13 @@ inline double vtkFoamReadValue<double>::ReadValue(vtkFoamIOobject& io)
 }
 
 //------------------------------------------------------------------------------
-// class vtkFoamEntryValue
-// a class that represents a value of a dictionary entry that corresponds to
-// its keyword. note that an entry can have more than one value.
-struct vtkFoamEntryValue : public vtkFoamToken
-{
-private:
-  typedef vtkFoamToken Superclass;
-
-  bool IsUniformEntry;
-  bool Managed;
-  const vtkFoamEntry* UpperEntryPtr;
-
-  vtkFoamEntryValue() = delete;
-  vtkObjectBase* ToVTKObject() { return this->Superclass::VtkObjectPtr; }
-  void Clear();
-  void ReadList(vtkFoamIOobject& io);
-
-public:
-  // Construct empty value with given parent
-  explicit vtkFoamEntryValue(const vtkFoamEntry* parent)
-    : IsUniformEntry(false)
-    , Managed(true)
-    , UpperEntryPtr(parent)
-  {
-  }
-  // Copy construct
-  vtkFoamEntryValue(vtkFoamEntryValue& val, const vtkFoamEntry* parent);
-  ~vtkFoamEntryValue() { this->Clear(); }
+// struct vtkFoamRead for reading primitives, lists etc.
 
-  // Helper Classes
+struct vtkFoamRead
+{
+  // --------------------------------------------------------------------------
+  // Reading lists of primitives (int/float/...)
 
-  // Reads primitive int/float lists
   template <typename listT, typename primitiveT>
   class listTraits
   {
@@ -3468,9 +3446,18 @@ public:
     // Get the contained pointer
     listT* GetPointer() const noexcept { return this->Ptr; }
 
-    // Deference pointer for operation
+    // De-reference pointer for operation
     listT* operator->() const noexcept { return this->Ptr; }
 
+    void ReadValue(vtkFoamIOobject&, const vtkFoamToken& currToken)
+    {
+      if (!currToken.Is<primitiveT>())
+      {
+        throw vtkFoamError() << "Expected an integer or a (, found " << currToken;
+      }
+      this->Ptr->InsertNextValue(currToken.To<primitiveT>());
+    }
+
     void ReadUniformValues(vtkFoamIOobject& io)
     {
       primitiveT value = vtkFoamReadValue<primitiveT>::ReadValue(io);
@@ -3506,17 +3493,9 @@ public:
         fileData->Delete();
       }
     }
-
-    void ReadValue(vtkFoamIOobject&, vtkFoamToken& currToken)
-    {
-      if (!currToken.Is<primitiveT>())
-      {
-        throw vtkFoamError() << "Expected an integer or a (, found " << currToken;
-      }
-      this->Ptr->InsertNextValue(currToken.To<primitiveT>());
-    }
   };
 
+  // --------------------------------------------------------------------------
   // Reads rank 1 lists of types vector, sphericalTensor, symmTensor and tensor.
   // If isPositions is true it reads Cloud type of data as
   // particle positions. cf. (the positions format)
@@ -3526,6 +3505,20 @@ public:
   {
     listT* Ptr;
 
+    // Items to skip for lagrangian/positions (class Cloud) after the x/y/z values.
+    // xyz (3*scalar) + celli (label)
+    // in OpenFOAM 1.4 -> 2.4 also had facei (label) and stepFraction (scalar)
+    // ASCII only
+    static void LagrangianPositionsSkip(vtkFoamIOobject& io)
+    {
+      (void)io.ReadIntegerValue(); // Skip celli (label)
+      if (io.GetLagrangianPositionsExtraData())
+      {
+        (void)io.ReadIntegerValue(); // Skip facei (label)
+        (void)io.ReadDoubleValue();  // Skip stepFraction (scalar)
+      }
+    }
+
   public:
     using ValueType = typename listT::ValueType;
 
@@ -3538,9 +3531,25 @@ public:
     // Get the contained pointer
     listT* GetPointer() const noexcept { return this->Ptr; }
 
-    // Deference pointer for operation
+    // De-reference pointer for operation
     listT* operator->() const noexcept { return this->Ptr; }
 
+    void ReadValue(vtkFoamIOobject& io, const vtkFoamToken& currToken)
+    {
+      if (currToken != '(')
+      {
+        throw vtkFoamError() << "Expected '(', found " << currToken;
+      }
+      primitiveT tuple[nComponents];
+      for (int cmpt = 0; cmpt < nComponents; ++cmpt)
+      {
+        tuple[cmpt] = vtkFoamReadValue<primitiveT>::ReadValue(io);
+      }
+      ::remapFoamTuple<nComponents == 6>(tuple); // For symmTensor
+      io.ReadExpecting(')');
+      this->Ptr->InsertNextTuple(tuple);
+    }
+
     void ReadUniformValues(vtkFoamIOobject& io)
     {
       const vtkIdType nTuples = this->Ptr->GetNumberOfTuples();
@@ -3555,9 +3564,8 @@ public:
       io.ReadExpecting(')');
       if (isPositions)
       {
-        (void)io.ReadIntegerValue(); // Skip label celli
+        this->LagrangianPositionsSkip(io);
       }
-
       for (vtkIdType i = 0; i < nTuples; ++i)
       {
         this->Ptr->SetTuple(i, tuple);
@@ -3580,7 +3588,7 @@ public:
         io.ReadExpecting(')');
         if (isPositions)
         {
-          (void)io.ReadIntegerValue(); // Skip label celli
+          this->LagrangianPositionsSkip(io);
         }
       }
     }
@@ -3635,23 +3643,40 @@ public:
         }
       }
     }
-
-    void ReadValue(vtkFoamIOobject& io, vtkFoamToken& currToken)
-    {
-      if (currToken != '(')
-      {
-        throw vtkFoamError() << "Expected '(', found " << currToken;
-      }
-      primitiveT tuple[nComponents];
-      for (int cmpt = 0; cmpt < nComponents; ++cmpt)
-      {
-        tuple[cmpt] = vtkFoamReadValue<primitiveT>::ReadValue(io);
-      }
-      ::remapFoamTuple<nComponents == 6>(tuple); // For symmTensor
-      io.ReadExpecting(')');
-      this->Ptr->InsertNextTuple(tuple);
-    }
   };
+};
+
+//------------------------------------------------------------------------------
+// class vtkFoamEntryValue
+// a class that represents a value of a dictionary entry that corresponds to
+// its keyword. note that an entry can have more than one value.
+struct vtkFoamEntryValue : public vtkFoamToken
+{
+private:
+  typedef vtkFoamToken Superclass;
+
+  bool IsUniformEntry;
+  bool Managed;
+  const vtkFoamEntry* UpperEntryPtr;
+
+  vtkFoamEntryValue() = delete;
+  vtkObjectBase* ToVTKObject() { return this->Superclass::VtkObjectPtr; }
+
+  // Delete if managed
+  void Clear();
+  void ReadList(vtkFoamIOobject& io);
+
+public:
+  // Construct empty value with given parent
+  explicit vtkFoamEntryValue(const vtkFoamEntry* parent)
+    : IsUniformEntry(false)
+    , Managed(true)
+    , UpperEntryPtr(parent)
+  {
+  }
+  // Copy construct
+  vtkFoamEntryValue(vtkFoamEntryValue& val, const vtkFoamEntry* parent);
+  ~vtkFoamEntryValue() { this->Clear(); }
 
   // Member Functions
 
@@ -3736,70 +3761,6 @@ public:
     this->Superclass::ScalarListPtr->FillValue(val);
   }
 
-  // Read dimensions set (always ASCII). The leading '[' has already been removed before calling.
-  // - can be integer or floating point
-  // - user-generated files may have only the first five dimensions.
-  // Note
-  // - may even have "human-readable" values such as [kg m^-1 s^-2] but they are very rare
-  //   and we silently skip these
-  void ReadDimensionSet(vtkFoamIOobject& io)
-  {
-    const int nDimensions = 7; // There are 7 base dimensions
-    this->MakeScalarList(nDimensions, 0.0);
-    vtkFloatArray& dims = *(this->Superclass::ScalarListPtr);
-
-    // Read using tokenizer to handle scalar/label, variable lengths, and ignore human-readable
-    vtkFoamToken tok;
-    char expectEnding = ']';
-    bool goodInput = true;
-
-    for (int ndims = 0; ndims < nDimensions && goodInput && expectEnding; ++ndims)
-    {
-      if (!io.Read(tok))
-      {
-        goodInput = false;
-      }
-      else if (tok.IsNumeric())
-      {
-        dims.SetValue(ndims, tok.ToFloat());
-      }
-      else if (tok.IsPunctuation())
-      {
-        if (tok == expectEnding)
-        {
-          expectEnding = '\0'; // Already got the closing ']'
-        }
-        else
-        {
-          goodInput = false;
-        }
-      }
-      else
-      {
-        // Some unknown token type (eg, encountered human-readable units)
-        // - skip until ']'
-        while ((goodInput = io.Read(tok)) == true)
-        {
-          if (tok.IsPunctuation() && (tok == expectEnding))
-          {
-            expectEnding = '\0'; // Already got the closing ']'
-            break;
-          }
-        }
-        break;
-      }
-    }
-
-    if (!goodInput)
-    {
-      io.ThrowStackTrace("Unexpected input while parsing dimensions array");
-    }
-    else if (expectEnding)
-    {
-      io.ReadExpecting(expectEnding);
-    }
-  }
-
   template <vtkFoamToken::tokenType listType, typename traitsT>
   void ReadNonUniformList(vtkFoamIOobject& io);
 
@@ -3807,201 +3768,23 @@ public:
   // Return false if could not be dispatched
   bool ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::dataType fieldDataType);
 
-  // reads a list of labelLists. requires size prefix of the listList
+  bool ReadField(vtkFoamIOobject& io);
+
+  // Read a list of labelLists. requires size prefix of the listList
   // to be present. size of each sublist must also be present in the
   // stream if the format is binary.
-  void ReadLabelListList(vtkFoamIOobject& io)
-  {
-    // NOTE:
-    // when OpenFOAM writes a "faceCompactList" it automatically switches to ASCII
-    // if it detects that the offsets will overflow 32bits.
-    //
-    // We risk the same overflow potential when constructing a compact labelListList.
-    // Thus assume the worst and use 64bit sizing when reading ASCII.
-
-    const bool use64BitLabels = (io.IsLabel64() || io.IsAsciiFormat());
-
-    vtkFoamToken currToken;
-    currToken.SetStreamOption(io);
-    if (!io.Read(currToken))
-    {
-      throw vtkFoamError() << "Unexpected EOF";
-    }
-    if (currToken.IsLabel())
-    {
-      const vtkTypeInt64 listLen = currToken.To<vtkTypeInt64>();
-      if (listLen < 0)
-      {
-        throw vtkFoamError() << "Illegal negative list length: " << listLen;
-      }
-      if (use64BitLabels)
-      {
-        this->LabelListListPtr = new vtkFoamLabelListList64;
-      }
-      else
-      {
-        this->LabelListListPtr = new vtkFoamLabelListList32;
-      }
-      // Initial guess for list length
-      this->LabelListListPtr->ResizeExact(listLen, 4 * listLen);
-
-      this->Superclass::Type = vtkFoamToken::LABELLISTLIST;
-      io.ReadExpecting('(');
-      vtkIdType nTotalElems = 0;
-      for (vtkTypeInt64 idx = 0; idx < listLen; ++idx)
-      {
-        if (!io.Read(currToken))
-        {
-          throw vtkFoamError() << "Unexpected EOF";
-        }
-        if (currToken.IsLabel())
-        {
-          const vtkTypeInt64 sublistLen = currToken.To<vtkTypeInt64>();
-          if (sublistLen < 0)
-          {
-            throw vtkFoamError() << "Illegal negative list length: " << sublistLen;
-          }
-
-          // LabelListListPtr->SetOffset(idx, nTotalElems);
-          void* sublist = this->LabelListListPtr->WritePointer(idx, nTotalElems, sublistLen);
-
-          if (io.IsAsciiFormat())
-          {
-            io.ReadExpecting('(');
-            for (vtkTypeInt64 subIdx = 0; subIdx < sublistLen; ++subIdx)
-            {
-              vtkTypeInt64 value(vtkFoamReadValue<vtkTypeInt64>::ReadValue(io));
-              this->LabelListListPtr->SetValue(idx, subIdx, value);
-            }
-            io.ReadExpecting(')');
-          }
-          else if (sublistLen > 0)
-          {
-            // Non-empty (binary) list - only read parentheses only when size > 0
-            const size_t nbytes =
-              static_cast<size_t>(sublistLen * this->LabelListListPtr->GetLabelSize());
-
-            io.ReadExpecting('(');
-            io.Read(reinterpret_cast<unsigned char*>(sublist), nbytes);
-            io.ReadExpecting(')');
-          }
-          nTotalElems += sublistLen;
-        }
-        else if (currToken == '(')
-        {
-          this->Superclass::LabelListListPtr->SetOffset(idx, nTotalElems);
-          while (io.Read(currToken) && currToken != ')')
-          {
-            if (!currToken.IsLabel())
-            {
-              throw vtkFoamError() << "Expected an integer, found " << currToken;
-            }
-            this->Superclass::LabelListListPtr->InsertValue(nTotalElems++, currToken.To<int>());
-            ++nTotalElems;
-          }
-        }
-        else
-        {
-          throw vtkFoamError() << "Expected integer or '(', found " << currToken;
-        }
-      }
-
-      // Set the final offset
-      this->Superclass::LabelListListPtr->SetOffset(listLen, nTotalElems);
-
-      // Shrink to the actually used size
-      this->Superclass::LabelListListPtr->ResizeData(nTotalElems);
-      io.ReadExpecting(')');
-    }
-    else
-    {
-      throw vtkFoamError() << "Expected integer, found " << currToken;
-    }
-  }
+  void ReadLabelListList(vtkFoamIOobject& io);
 
   // Read compact labelListList which has offsets and data
-  void ReadCompactLabelListList(vtkFoamIOobject& io)
-  {
-    if (io.IsAsciiFormat())
-    {
-      this->ReadLabelListList(io);
-      return;
-    }
-
-    this->SetStreamOption(io);
-    const bool use64BitLabels = io.IsLabel64();
-
-    if (use64BitLabels)
-    {
-      this->LabelListListPtr = new vtkFoamLabelListList64;
-    }
-    else
-    {
-      this->LabelListListPtr = new vtkFoamLabelListList32;
-    }
-    this->Superclass::Type = vtkFoamToken::LABELLISTLIST;
-    for (int arrayI = 0; arrayI < 2; arrayI++)
-    {
-      vtkFoamToken currToken;
-      currToken.SetStreamOption(io);
-      if (!io.Read(currToken))
-      {
-        throw vtkFoamError() << "Unexpected EOF";
-      }
-      if (currToken.IsLabel())
-      {
-        vtkTypeInt64 listLen = currToken.To<vtkTypeInt64>();
-        if (listLen < 0)
-        {
-          throw vtkFoamError() << "Illegal negative list length: " << listLen;
-        }
-
-        vtkDataArray* array = (arrayI == 0 ? this->Superclass::LabelListListPtr->GetOffsetsArray()
-                                           : this->Superclass::LabelListListPtr->GetDataArray());
-        array->SetNumberOfValues(static_cast<vtkIdType>(listLen));
-
-        if (listLen > 0)
-        {
-          // Non-empty (binary) list - only read parentheses only when size > 0
-
-          io.ReadExpecting('('); // Begin list
-          io.Read(reinterpret_cast<unsigned char*>(array->GetVoidPointer(0)),
-            static_cast<vtkTypeInt64>(listLen * array->GetDataTypeSize()));
-          io.ReadExpecting(')'); // End list
-        }
-      }
-      else
-      {
-        throw vtkFoamError() << "Expected integer, found " << currToken;
-      }
-    }
-  }
-
-  bool ReadField(vtkFoamIOobject& io)
-  {
-    this->SetStreamOption(io);
-
-    // Basic field types: "boolField", "labelField", "scalarField" ...
-    vtkFoamTypes::dataType listDataType(vtkFoamTypes::FieldToEnum(io.GetClassName()));
+  void ReadCompactLabelListList(vtkFoamIOobject& io);
 
-    try
-    {
-      if (vtkFoamTypes::IsGood(listDataType))
-      {
-        this->ReadNonUniformList(io, listDataType);
-      }
-      else
-      {
-        throw vtkFoamError() << "Unsupported field type " << io.GetClassName();
-      }
-    }
-    catch (const vtkFoamError& err)
-    {
-      io.SetError(err);
-      return false;
-    }
-    return true;
-  }
+  // Read dimensions set (always ASCII). The leading '[' has already been removed before calling.
+  // - can be integer or floating point
+  // - user-generated files may have only the first five dimensions.
+  // Note
+  // - may even have "human-readable" values such as [kg m^-1 s^-2] but they are very rare
+  //   and we silently skip these
+  void ReadDimensionSet(vtkFoamIOobject& io);
 };
 
 //------------------------------------------------------------------------------
@@ -4087,7 +3870,9 @@ bool vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::da
     {
       // List<bool> is read as a list of bytes (binary) or ints (ascii)
       // - primary location is the flipMap entry in faceZones
-      this->ReadNonUniformList<BOOLLIST, listTraits<vtkTypeInt8Array, vtkTypeInt8>>(io);
+
+      this->ReadNonUniformList<BOOLLIST, //
+        vtkFoamRead::listTraits<vtkTypeInt8Array, vtkTypeInt8>>(io);
       break;
     }
 
@@ -4095,11 +3880,13 @@ bool vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::da
     {
       if (io.IsLabel64())
       {
-        this->ReadNonUniformList<LABELLIST, listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+        this->ReadNonUniformList<LABELLIST, //
+          vtkFoamRead::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
       }
       else
       {
-        this->ReadNonUniformList<LABELLIST, listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+        this->ReadNonUniformList<LABELLIST, //
+          vtkFoamRead::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
       }
       break;
     }
@@ -4108,11 +3895,13 @@ bool vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::da
     {
       if (io.IsFloat64())
       {
-        this->ReadNonUniformList<SCALARLIST, listTraits<vtkFloatArray, double>>(io);
+        this->ReadNonUniformList<SCALARLIST, //
+          vtkFoamRead::listTraits<vtkFloatArray, double>>(io);
       }
       else
       {
-        this->ReadNonUniformList<SCALARLIST, listTraits<vtkFloatArray, float>>(io);
+        this->ReadNonUniformList<SCALARLIST, //
+          vtkFoamRead::listTraits<vtkFloatArray, float>>(io);
       }
       break;
     }
@@ -4121,11 +3910,13 @@ bool vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::da
     {
       if (io.IsFloat64())
       {
-        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 1>>(io);
+        this->ReadNonUniformList<VECTORLIST, //
+          vtkFoamRead::vectorListTraits<vtkFloatArray, double, 1>>(io);
       }
       else
       {
-        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 1>>(io);
+        this->ReadNonUniformList<VECTORLIST, //
+          vtkFoamRead::vectorListTraits<vtkFloatArray, float, 1>>(io);
       }
       break;
     }
@@ -4134,11 +3925,13 @@ bool vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::da
     {
       if (io.IsFloat64())
       {
-        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 3>>(io);
+        this->ReadNonUniformList<VECTORLIST, //
+          vtkFoamRead::vectorListTraits<vtkFloatArray, double, 3>>(io);
       }
       else
       {
-        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 3>>(io);
+        this->ReadNonUniformList<VECTORLIST, //
+          vtkFoamRead::vectorListTraits<vtkFloatArray, float, 3>>(io);
       }
       break;
     }
@@ -4147,11 +3940,13 @@ bool vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::da
     {
       if (io.IsFloat64())
       {
-        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 6>>(io);
+        this->ReadNonUniformList<VECTORLIST, //
+          vtkFoamRead::vectorListTraits<vtkFloatArray, double, 6>>(io);
       }
       else
       {
-        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 6>>(io);
+        this->ReadNonUniformList<VECTORLIST, //
+          vtkFoamRead::vectorListTraits<vtkFloatArray, float, 6>>(io);
       }
       break;
     }
@@ -4160,11 +3955,13 @@ bool vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::da
     {
       if (io.IsFloat64())
       {
-        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, double, 9>>(io);
+        this->ReadNonUniformList<VECTORLIST, //
+          vtkFoamRead::vectorListTraits<vtkFloatArray, double, 9>>(io);
       }
       else
       {
-        this->ReadNonUniformList<VECTORLIST, vectorListTraits<vtkFloatArray, float, 9>>(io);
+        this->ReadNonUniformList<VECTORLIST, //
+          vtkFoamRead::vectorListTraits<vtkFloatArray, float, 9>>(io);
       }
       break;
     }
@@ -4178,6 +3975,266 @@ bool vtkFoamEntryValue::ReadNonUniformList(vtkFoamIOobject& io, vtkFoamTypes::da
   return handled;
 }
 
+bool vtkFoamEntryValue::ReadField(vtkFoamIOobject& io)
+{
+  this->SetStreamOption(io);
+
+  // Basic field types: "boolField", "labelField", "scalarField" ...
+  vtkFoamTypes::dataType listDataType(vtkFoamTypes::FieldToEnum(io.GetClassName()));
+
+  try
+  {
+    if (vtkFoamTypes::IsGood(listDataType))
+    {
+      this->ReadNonUniformList(io, listDataType);
+    }
+    else
+    {
+      throw vtkFoamError() << "Unsupported field type " << io.GetClassName();
+    }
+  }
+  catch (const vtkFoamError& err)
+  {
+    io.SetError(err);
+    return false;
+  }
+  return true;
+}
+
+// Read a list of labelLists. requires size prefix of the listList
+// to be present. size of each sublist must also be present in the
+// stream if the format is binary.
+void vtkFoamEntryValue::ReadLabelListList(vtkFoamIOobject& io)
+{
+  // NOTE:
+  // when OpenFOAM writes a "faceCompactList" it automatically switches to ASCII
+  // if it detects that the offsets will overflow 32bits.
+  //
+  // We risk the same overflow potential when constructing a compact labelListList.
+  // Thus assume the worst and use 64bit sizing when reading ASCII.
+
+  const bool use64BitLabels = (io.IsLabel64() || io.IsAsciiFormat());
+
+  vtkFoamToken currToken;
+  currToken.SetStreamOption(io);
+  if (!io.Read(currToken))
+  {
+    throw vtkFoamError() << "Unexpected EOF";
+  }
+  if (currToken.IsLabel())
+  {
+    const vtkTypeInt64 listLen = currToken.To<vtkTypeInt64>();
+    if (listLen < 0)
+    {
+      throw vtkFoamError() << "Illegal negative list length: " << listLen;
+    }
+    if (use64BitLabels)
+    {
+      this->LabelListListPtr = new vtkFoamLabelListList64;
+    }
+    else
+    {
+      this->LabelListListPtr = new vtkFoamLabelListList32;
+    }
+    // Initial guess for list length
+    this->LabelListListPtr->ResizeExact(listLen, 4 * listLen);
+
+    this->Superclass::Type = vtkFoamToken::LABELLISTLIST;
+    io.ReadExpecting('(');
+    vtkIdType nTotalElems = 0;
+    for (vtkTypeInt64 idx = 0; idx < listLen; ++idx)
+    {
+      if (!io.Read(currToken))
+      {
+        throw vtkFoamError() << "Unexpected EOF";
+      }
+      if (currToken.IsLabel())
+      {
+        const vtkTypeInt64 sublistLen = currToken.To<vtkTypeInt64>();
+        if (sublistLen < 0)
+        {
+          throw vtkFoamError() << "Illegal negative list length: " << sublistLen;
+        }
+
+        // LabelListListPtr->SetOffset(idx, nTotalElems);
+        void* sublist = this->LabelListListPtr->WritePointer(idx, nTotalElems, sublistLen);
+
+        if (io.IsAsciiFormat())
+        {
+          io.ReadExpecting('(');
+          for (vtkTypeInt64 subIdx = 0; subIdx < sublistLen; ++subIdx)
+          {
+            vtkTypeInt64 value(vtkFoamReadValue<vtkTypeInt64>::ReadValue(io));
+            this->LabelListListPtr->SetValue(idx, subIdx, value);
+          }
+          io.ReadExpecting(')');
+        }
+        else if (sublistLen > 0)
+        {
+          // Non-empty (binary) list - only read parentheses only when size > 0
+          const size_t nbytes =
+            static_cast<size_t>(sublistLen * this->LabelListListPtr->GetLabelSize());
+
+          io.ReadExpecting('(');
+          io.Read(reinterpret_cast<unsigned char*>(sublist), nbytes);
+          io.ReadExpecting(')');
+        }
+        nTotalElems += sublistLen;
+      }
+      else if (currToken == '(')
+      {
+        this->Superclass::LabelListListPtr->SetOffset(idx, nTotalElems);
+        while (io.Read(currToken) && currToken != ')')
+        {
+          if (!currToken.IsLabel())
+          {
+            throw vtkFoamError() << "Expected an integer, found " << currToken;
+          }
+          this->Superclass::LabelListListPtr->InsertValue(nTotalElems++, currToken.To<int>());
+          ++nTotalElems;
+        }
+      }
+      else
+      {
+        throw vtkFoamError() << "Expected integer or '(', found " << currToken;
+      }
+    }
+
+    // Set the final offset
+    this->Superclass::LabelListListPtr->SetOffset(listLen, nTotalElems);
+
+    // Shrink to the actually used size
+    this->Superclass::LabelListListPtr->ResizeData(nTotalElems);
+    io.ReadExpecting(')');
+  }
+  else
+  {
+    throw vtkFoamError() << "Expected integer, found " << currToken;
+  }
+}
+
+// Read compact labelListList which has offsets and data
+void vtkFoamEntryValue::ReadCompactLabelListList(vtkFoamIOobject& io)
+{
+  if (io.IsAsciiFormat())
+  {
+    this->ReadLabelListList(io);
+    return;
+  }
+
+  this->SetStreamOption(io);
+  const bool use64BitLabels = io.IsLabel64();
+
+  if (use64BitLabels)
+  {
+    this->LabelListListPtr = new vtkFoamLabelListList64;
+  }
+  else
+  {
+    this->LabelListListPtr = new vtkFoamLabelListList32;
+  }
+  this->Superclass::Type = vtkFoamToken::LABELLISTLIST;
+  for (int arrayI = 0; arrayI < 2; arrayI++)
+  {
+    vtkFoamToken currToken;
+    currToken.SetStreamOption(io);
+    if (!io.Read(currToken))
+    {
+      throw vtkFoamError() << "Unexpected EOF";
+    }
+    if (currToken.IsLabel())
+    {
+      vtkTypeInt64 listLen = currToken.To<vtkTypeInt64>();
+      if (listLen < 0)
+      {
+        throw vtkFoamError() << "Illegal negative list length: " << listLen;
+      }
+
+      vtkDataArray* array = (arrayI == 0 ? this->Superclass::LabelListListPtr->GetOffsetsArray()
+                                         : this->Superclass::LabelListListPtr->GetDataArray());
+      array->SetNumberOfValues(static_cast<vtkIdType>(listLen));
+
+      if (listLen > 0)
+      {
+        // Non-empty (binary) list - only read parentheses only when size > 0
+
+        io.ReadExpecting('('); // Begin list
+        io.Read(reinterpret_cast<unsigned char*>(array->GetVoidPointer(0)),
+          static_cast<vtkTypeInt64>(listLen * array->GetDataTypeSize()));
+        io.ReadExpecting(')'); // End list
+      }
+    }
+    else
+    {
+      throw vtkFoamError() << "Expected integer, found " << currToken;
+    }
+  }
+}
+
+// Read dimensions set (always ASCII). The leading '[' has already been removed before calling.
+// - can be integer or floating point
+// - user-generated files may have only the first five dimensions.
+// Note
+// - may even have "human-readable" values such as [kg m^-1 s^-2] but they are very rare
+//   and we silently skip these
+void vtkFoamEntryValue::ReadDimensionSet(vtkFoamIOobject& io)
+{
+  const int nDimensions = 7; // There are 7 base dimensions
+  this->MakeScalarList(nDimensions, 0.0);
+  vtkFloatArray& dims = *(this->Superclass::ScalarListPtr);
+
+  // Read using tokenizer to handle scalar/label, variable lengths, and ignore human-readable
+  vtkFoamToken tok;
+  char expectEnding = ']';
+  bool goodInput = true;
+
+  for (int ndims = 0; ndims < nDimensions && goodInput && expectEnding; ++ndims)
+  {
+    if (!io.Read(tok))
+    {
+      goodInput = false;
+    }
+    else if (tok.IsNumeric())
+    {
+      dims.SetValue(ndims, tok.ToFloat());
+    }
+    else if (tok.IsPunctuation())
+    {
+      if (tok == expectEnding)
+      {
+        expectEnding = '\0'; // Already got the closing ']'
+      }
+      else
+      {
+        goodInput = false;
+      }
+    }
+    else
+    {
+      // Some unknown token type (eg, encountered human-readable units)
+      // - skip until ']'
+      while ((goodInput = io.Read(tok)) == true)
+      {
+        if (tok.IsPunctuation() && (tok == expectEnding))
+        {
+          expectEnding = '\0'; // Already got the closing ']'
+          break;
+        }
+      }
+      break;
+    }
+  }
+
+  if (!goodInput)
+  {
+    io.ThrowStackTrace("Unexpected input while parsing dimensions array");
+  }
+  else if (expectEnding)
+  {
+    io.ReadExpecting(expectEnding);
+  }
+}
+
 //------------------------------------------------------------------------------
 // class vtkFoamEntry
 // a class that represents an entry of a dictionary. note that an
@@ -6547,13 +6604,13 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::ReadPointsFile(
 
     if (io.IsFloat64())
     {
-      dict.ReadNonUniformList<vtkFoamToken::VECTORLIST,
-        vtkFoamEntryValue::vectorListTraits<vtkFloatArray, double, 3>>(io);
+      dict.ReadNonUniformList<vtkFoamToken::VECTORLIST, //
+        vtkFoamRead::vectorListTraits<vtkFloatArray, double, 3>>(io);
     }
     else
     {
-      dict.ReadNonUniformList<vtkFoamToken::VECTORLIST,
-        vtkFoamEntryValue::vectorListTraits<vtkFloatArray, float, 3>>(io);
+      dict.ReadNonUniformList<vtkFoamToken::VECTORLIST, //
+        vtkFoamRead::vectorListTraits<vtkFloatArray, float, 3>>(io);
     }
 
     // Capture content as smart pointer
@@ -6660,13 +6717,13 @@ bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& timeRe
     {
       if (use64BitLabels)
       {
-        ownerDict.ReadNonUniformList<vtkFoamToken::LABELLIST,
-          vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+        ownerDict.ReadNonUniformList<vtkFoamToken::LABELLIST, //
+          vtkFoamRead::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
       }
       else
       {
-        ownerDict.ReadNonUniformList<vtkFoamToken::LABELLIST,
-          vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+        ownerDict.ReadNonUniformList<vtkFoamToken::LABELLIST, //
+          vtkFoamRead::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
       }
     }
     catch (const vtkFoamError& err)
@@ -6721,13 +6778,13 @@ bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& timeRe
     {
       if (use64BitLabels)
       {
-        neighDict.ReadNonUniformList<vtkFoamToken::LABELLIST,
-          vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+        neighDict.ReadNonUniformList<vtkFoamToken::LABELLIST, //
+          vtkFoamRead::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
       }
       else
       {
-        neighDict.ReadNonUniformList<vtkFoamToken::LABELLIST,
-          vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+        neighDict.ReadNonUniformList<vtkFoamToken::LABELLIST, //
+          vtkFoamRead::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
       }
     }
     catch (const vtkFoamError& err)
@@ -9554,13 +9611,13 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
       {
         if (io.IsFloat64())
         {
-          dict.ReadNonUniformList<vtkFoamToken::VECTORLIST,
-            vtkFoamEntryValue::vectorListTraits<vtkFloatArray, double, 3, true>>(io);
+          dict.ReadNonUniformList<vtkFoamToken::VECTORLIST, //
+            vtkFoamRead::vectorListTraits<vtkFloatArray, double, 3, true>>(io);
         }
         else
         {
-          dict.ReadNonUniformList<vtkFoamToken::VECTORLIST,
-            vtkFoamEntryValue::vectorListTraits<vtkFloatArray, float, 3, true>>(io);
+          dict.ReadNonUniformList<vtkFoamToken::VECTORLIST, //
+            vtkFoamRead::vectorListTraits<vtkFloatArray, float, 3, true>>(io);
         }
 
         // Transfer float tuples to points
@@ -10118,13 +10175,13 @@ bool vtkOpenFOAMReaderPrivate::GetAreaMesh(
     {
       if (use64BitLabels)
       {
-        dict.ReadNonUniformList<vtkFoamToken::LABELLIST,
-          vtkFoamEntryValue::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
+        dict.ReadNonUniformList<vtkFoamToken::LABELLIST, //
+          vtkFoamRead::listTraits<vtkTypeInt64Array, vtkTypeInt64>>(io);
       }
       else
       {
-        dict.ReadNonUniformList<vtkFoamToken::LABELLIST,
-          vtkFoamEntryValue::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
+        dict.ReadNonUniformList<vtkFoamToken::LABELLIST, //
+          vtkFoamRead::listTraits<vtkTypeInt32Array, vtkTypeInt32>>(io);
       }
 
       // Capture content as smart pointer
-- 
GitLab


From 3b94d445ef1b9972a15e04a7beda719715a823fc Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Fri, 19 Mar 2021 18:45:59 +0100
Subject: [PATCH 25/36] DOC: update release notes for OpenFOAM reader

---
 .../release/dev/OpenFOAMReader-updates.md      | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/Documentation/release/dev/OpenFOAMReader-updates.md b/Documentation/release/dev/OpenFOAMReader-updates.md
index 4a4bd676697..9fabb4bd394 100644
--- a/Documentation/release/dev/OpenFOAMReader-updates.md
+++ b/Documentation/release/dev/OpenFOAMReader-updates.md
@@ -37,8 +37,6 @@
 
 - support floating-point dimensions entries (fixes #18103)
 
-- respect point patch value fields (fixes #18125)
-
 - properly handle empty zones
 
 - improve zone addressing and handling. Basic support for face zones
@@ -58,3 +56,19 @@
   - Drop old OpenFOAM 1.3 cloud naming.
     These were simply dumped into the time directory without any region
     qualifications. Defunct since about 2007.
+
+2021-03-19
+
+# OpenFOAM bugfixes / improvements
+
+- respect point patch value fields (fixes #18125),
+  use the correct "visit" order for the points
+
+- remove hard-coded limits on polyhedral size
+
+  For some systems, can have a so-called "single-cell" OpenFOAM mesh
+  with a single polyhedral cell that has LOTS of faces.
+
+  This can be used for mapping surface noise data to retain most of
+  the geometry but entirely discarding the internal field. It can also
+  potentially arise from finiteArea situations.
-- 
GitLab


From 48147c6acfbb5bb793161daaea5206e40c282b02 Mon Sep 17 00:00:00 2001
From: Mathieu Westphal <mathieu.westphal@kitware.com>
Date: Mon, 22 Mar 2021 14:24:33 +0100
Subject: [PATCH 26/36] Adding openfoam test(s)

---
 IO/Geometry/Testing/CMakeLists.txt            |  12 ++
 IO/Geometry/Testing/Cxx/CMakeLists.txt        |   1 +
 .../TestOpenFOAMReaderLagrangianSerial.cxx    | 112 ++++++++++++++++++
 .../simplifiedSiwek-serial/0.005/CH4.sha512   |   1 +
 .../simplifiedSiwek-serial/0.005/CO2.sha512   |   1 +
 .../simplifiedSiwek-serial/0.005/H2.sha512    |   1 +
 .../simplifiedSiwek-serial/0.005/H2O.sha512   |   1 +
 .../simplifiedSiwek-serial/0.005/N2.sha512    |   1 +
 .../simplifiedSiwek-serial/0.005/O2.sha512    |   1 +
 .../simplifiedSiwek-serial/0.005/T.sha512     |   1 +
 .../simplifiedSiwek-serial/0.005/U.sha512     |   1 +
 .../0.005/lagrangian/coalCloud1/Cp.sha512     |   1 +
 .../0.005/lagrangian/coalCloud1/T.sha512      |   1 +
 .../0.005/lagrangian/coalCloud1/U.sha512      |   1 +
 .../lagrangian/coalCloud1/UCorrect.sha512     |   1 +
 .../0.005/lagrangian/coalCloud1/UTurb.sha512  |   1 +
 .../0.005/lagrangian/coalCloud1/Ygas.sha512   |   1 +
 .../lagrangian/coalCloud1/Yliquid.sha512      |   1 +
 .../0.005/lagrangian/coalCloud1/Ysolid.sha512 |   1 +
 .../0.005/lagrangian/coalCloud1/active.sha512 |   1 +
 .../0.005/lagrangian/coalCloud1/age.sha512    |   1 +
 .../lagrangian/coalCloud1/coordinates.sha512  |   1 +
 .../0.005/lagrangian/coalCloud1/d.sha512      |   1 +
 .../lagrangian/coalCloud1/dTarget.sha512      |   1 +
 .../0.005/lagrangian/coalCloud1/mass0.sha512  |   1 +
 .../lagrangian/coalCloud1/nParticle.sha512    |   1 +
 .../0.005/lagrangian/coalCloud1/origId.sha512 |   1 +
 .../lagrangian/coalCloud1/origProcId.sha512   |   1 +
 .../lagrangian/coalCloud1/positions.sha512    |   1 +
 .../0.005/lagrangian/coalCloud1/rho.sha512    |   1 +
 .../0.005/lagrangian/coalCloud1/tTurb.sha512  |   1 +
 .../0.005/lagrangian/coalCloud1/typeId.sha512 |   1 +
 .../lagrangian/limestoneCloud1/Cp.sha512      |   1 +
 .../0.005/lagrangian/limestoneCloud1/T.sha512 |   1 +
 .../0.005/lagrangian/limestoneCloud1/U.sha512 |   1 +
 .../limestoneCloud1/UCorrect.sha512           |   1 +
 .../lagrangian/limestoneCloud1/UTurb.sha512   |   1 +
 .../lagrangian/limestoneCloud1/active.sha512  |   1 +
 .../lagrangian/limestoneCloud1/age.sha512     |   1 +
 .../limestoneCloud1/coordinates.sha512        |   1 +
 .../0.005/lagrangian/limestoneCloud1/d.sha512 |   1 +
 .../lagrangian/limestoneCloud1/dTarget.sha512 |   1 +
 .../limestoneCloud1/nParticle.sha512          |   1 +
 .../lagrangian/limestoneCloud1/origId.sha512  |   1 +
 .../limestoneCloud1/origProcId.sha512         |   1 +
 .../limestoneCloud1/positions.sha512          |   1 +
 .../lagrangian/limestoneCloud1/rho.sha512     |   1 +
 .../lagrangian/limestoneCloud1/tTurb.sha512   |   1 +
 .../lagrangian/limestoneCloud1/typeId.sha512  |   1 +
 .../simplifiedSiwek-serial/0.005/p.sha512     |   1 +
 .../simplifiedSiwek-serial/0.005/qr.sha512    |   1 +
 .../simplifiedSiwek-serial/0.005/rho.sha512   |   1 +
 .../simplifiedSiwek-serial/0.01/CH4.sha512    |   1 +
 .../simplifiedSiwek-serial/0.01/CO2.sha512    |   1 +
 .../simplifiedSiwek-serial/0.01/H2.sha512     |   1 +
 .../simplifiedSiwek-serial/0.01/H2O.sha512    |   1 +
 .../simplifiedSiwek-serial/0.01/N2.sha512     |   1 +
 .../simplifiedSiwek-serial/0.01/O2.sha512     |   1 +
 .../simplifiedSiwek-serial/0.01/T.sha512      |   1 +
 .../simplifiedSiwek-serial/0.01/U.sha512      |   1 +
 .../0.01/lagrangian/coalCloud1/Cp.sha512      |   1 +
 .../0.01/lagrangian/coalCloud1/T.sha512       |   1 +
 .../0.01/lagrangian/coalCloud1/U.sha512       |   1 +
 .../lagrangian/coalCloud1/UCorrect.sha512     |   1 +
 .../0.01/lagrangian/coalCloud1/UTurb.sha512   |   1 +
 .../0.01/lagrangian/coalCloud1/Ygas.sha512    |   1 +
 .../0.01/lagrangian/coalCloud1/Yliquid.sha512 |   1 +
 .../0.01/lagrangian/coalCloud1/Ysolid.sha512  |   1 +
 .../0.01/lagrangian/coalCloud1/active.sha512  |   1 +
 .../0.01/lagrangian/coalCloud1/age.sha512     |   1 +
 .../lagrangian/coalCloud1/coordinates.sha512  |   1 +
 .../0.01/lagrangian/coalCloud1/d.sha512       |   1 +
 .../0.01/lagrangian/coalCloud1/dTarget.sha512 |   1 +
 .../0.01/lagrangian/coalCloud1/mass0.sha512   |   1 +
 .../lagrangian/coalCloud1/nParticle.sha512    |   1 +
 .../0.01/lagrangian/coalCloud1/origId.sha512  |   1 +
 .../lagrangian/coalCloud1/origProcId.sha512   |   1 +
 .../lagrangian/coalCloud1/positions.sha512    |   1 +
 .../0.01/lagrangian/coalCloud1/rho.sha512     |   1 +
 .../0.01/lagrangian/coalCloud1/tTurb.sha512   |   1 +
 .../0.01/lagrangian/coalCloud1/typeId.sha512  |   1 +
 .../0.01/lagrangian/limestoneCloud1/Cp.sha512 |   1 +
 .../0.01/lagrangian/limestoneCloud1/T.sha512  |   1 +
 .../0.01/lagrangian/limestoneCloud1/U.sha512  |   1 +
 .../limestoneCloud1/UCorrect.sha512           |   1 +
 .../lagrangian/limestoneCloud1/UTurb.sha512   |   1 +
 .../lagrangian/limestoneCloud1/active.sha512  |   1 +
 .../lagrangian/limestoneCloud1/age.sha512     |   1 +
 .../limestoneCloud1/coordinates.sha512        |   1 +
 .../0.01/lagrangian/limestoneCloud1/d.sha512  |   1 +
 .../lagrangian/limestoneCloud1/dTarget.sha512 |   1 +
 .../limestoneCloud1/nParticle.sha512          |   1 +
 .../lagrangian/limestoneCloud1/origId.sha512  |   1 +
 .../limestoneCloud1/origProcId.sha512         |   1 +
 .../limestoneCloud1/positions.sha512          |   1 +
 .../lagrangian/limestoneCloud1/rho.sha512     |   1 +
 .../lagrangian/limestoneCloud1/tTurb.sha512   |   1 +
 .../lagrangian/limestoneCloud1/typeId.sha512  |   1 +
 .../simplifiedSiwek-serial/0.01/p.sha512      |   1 +
 .../simplifiedSiwek-serial/0.01/rho.sha512    |   1 +
 .../simplifiedSiwek-serial/0/CH4.sha512       |   1 +
 .../simplifiedSiwek-serial/0/CO.sha512        |   1 +
 .../simplifiedSiwek-serial/0/CO2.sha512       |   1 +
 .../simplifiedSiwek-serial/0/G.sha512         |   1 +
 .../simplifiedSiwek-serial/0/H2.sha512        |   1 +
 .../simplifiedSiwek-serial/0/H2O.sha512       |   1 +
 .../simplifiedSiwek-serial/0/N2.sha512        |   1 +
 .../simplifiedSiwek-serial/0/O2.sha512        |   1 +
 .../simplifiedSiwek-serial/0/T.sha512         |   1 +
 .../simplifiedSiwek-serial/0/U.sha512         |   1 +
 .../simplifiedSiwek-serial/0/alphat.sha512    |   1 +
 .../simplifiedSiwek-serial/0/epsilon.sha512   |   1 +
 .../simplifiedSiwek-serial/0/k.sha512         |   1 +
 .../simplifiedSiwek-serial/0/nut.sha512       |   1 +
 .../simplifiedSiwek-serial/0/p.sha512         |   1 +
 .../constant/polyMesh/boundary.sha512         |   1 +
 .../constant/polyMesh/faces.sha512            |   1 +
 .../constant/polyMesh/neighbour.sha512        |   1 +
 .../constant/polyMesh/owner.sha512            |   1 +
 .../constant/polyMesh/points.sha512           |   1 +
 .../simplifiedSiwek-serial.foam               |   0
 .../system/controlDict.sha512                 |   1 +
 122 files changed, 243 insertions(+)
 create mode 100644 IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Cp.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/UCorrect.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/UTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Ygas.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Yliquid.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Ysolid.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/active.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/age.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/coordinates.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/d.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/dTarget.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/mass0.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/nParticle.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/origId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/origProcId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/positions.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/tTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/typeId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/Cp.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/UCorrect.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/UTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/active.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/age.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/coordinates.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/d.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/dTarget.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/nParticle.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/origId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/origProcId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/positions.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/tTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/typeId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/qr.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/Cp.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/UCorrect.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/UTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/Ygas.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/Yliquid.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/Ysolid.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/active.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/age.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/coordinates.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/d.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/dTarget.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/mass0.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/nParticle.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/origId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/origProcId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/positions.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/tTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/typeId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/Cp.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/UCorrect.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/UTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/active.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/age.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/coordinates.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/d.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/dTarget.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/nParticle.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/origId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/origProcId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/positions.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/tTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/typeId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.01/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/CO.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/G.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/alphat.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/epsilon.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/k.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/nut.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/boundary.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/faces.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/neighbour.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/owner.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/points.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/system/controlDict.sha512

diff --git a/IO/Geometry/Testing/CMakeLists.txt b/IO/Geometry/Testing/CMakeLists.txt
index fe41df5d182..1ee0a7501e5 100644
--- a/IO/Geometry/Testing/CMakeLists.txt
+++ b/IO/Geometry/Testing/CMakeLists.txt
@@ -33,6 +33,18 @@ vtk_module_test_data(
   Data/OpenFOAM/regex/constant/,REGEX:.*
   Data/OpenFOAM/regex/constant/polyMesh/,REGEX:.*
   Data/OpenFOAM/regex/system/,REGEX:.*
+  Data/OpenFOAM/simplifiedSiwek-serial/constant/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.01/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/system/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.005/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0/,REGEX:.*$
   Data/TecPlot/,REGEX:.*
   Data/Viewpoint/cow.obj
   Data/absolute_indices.obj
diff --git a/IO/Geometry/Testing/Cxx/CMakeLists.txt b/IO/Geometry/Testing/Cxx/CMakeLists.txt
index 3a84b04795c..3f430fb17fa 100644
--- a/IO/Geometry/Testing/Cxx/CMakeLists.txt
+++ b/IO/Geometry/Testing/Cxx/CMakeLists.txt
@@ -14,6 +14,7 @@ vtk_add_test_cxx(vtkIOGeometryCxxTests tests
   TestOBJReaderSingleTexture.cxx,NO_VALID
   TestOpenFOAMReader.cxx
   TestOpenFOAMReaderDimensionedFields.cxx,NO_VALID
+  TestOpenFOAMReaderLagrangianSerial.cxx,NO_VALID
   TestOpenFOAMReaderPrecision.cxx
   TestOpenFOAMReaderRegEx.cxx,NO_VALID
   TestProStarReader.cxx
diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
new file mode 100644
index 00000000000..981b35dca17
--- /dev/null
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
@@ -0,0 +1,112 @@
+/*=========================================================================
+
+  Program:   Visualization Toolkit
+  Module:    TestSimplePointsReaderWriter.cxx
+
+  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+  All rights reserved.
+  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notice for more information.
+
+=========================================================================*/
+
+#include <vtkCellData.h>
+#include <vtkCompositeDataSet.h>
+#include <vtkDataSetMapper.h>
+#include <vtkInformation.h>
+#include <vtkMultiBlockDataSet.h>
+#include <vtkOpenFOAMReader.h>
+#include <vtkPointData.h>
+#include <vtkPolyData.h>
+#include <vtkSmartPointer.h>
+#include <vtkTestUtilities.h>
+#include <vtkUnstructuredGrid.h>
+
+namespace
+{
+
+// Get named block
+template <class Type>
+static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
+{
+  const unsigned int nblocks = mb->GetNumberOfBlocks();
+  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  {
+    if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
+    {
+      return Type::SafeDownCast(mb->GetBlock(blocki));
+    }
+  }
+  return nullptr;
+}
+} // End anonymous namespace
+
+int TestOpenFOAMReaderLagrangianSerial(int argc, char* argv[])
+{
+  // Read file name.
+  char* filename = vtkTestUtilities::ExpandDataFileName(
+    argc, argv, "Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam");
+
+  // Read the file
+  vtkNew<vtkOpenFOAMReader> reader;
+  reader->SetFileName(filename);
+  delete[] filename;
+  reader->Update();
+
+  reader->SetTimeValue(0.01);
+  // reader->CreateCellToPointOn();
+  // reader->ReadZonesOn();
+
+  // Re-read with everything selected
+  reader->EnableAllPatchArrays();
+  reader->Update();
+
+  reader->Print(std::cout);
+  reader->GetOutput()->Print(std::cout);
+  // reader->GetOutput()->GetBlock(0)->Print(std::cout);
+
+  auto* allBlocks = vtkMultiBlockDataSet::SafeDownCast(reader->GetOutput());
+  auto* lagrangianBlocks = findBlock<vtkMultiBlockDataSet>(allBlocks, "lagrangian");
+
+  if (!lagrangianBlocks)
+  {
+    std::cout << "No lagrangian blocks!\n";
+    return 1;
+  }
+
+  vtkIdType nClouds = 0;
+  vtkIdType nParticles = 0;
+
+  const int nLagrangianFields = reader->GetNumberOfLagrangianArrays();
+  std::cout << "----- Have " << nLagrangianFields << " Lagrangian fields" << std::endl;
+
+  // Bad name, but it is what we have
+  for (int i = 0; i < reader->GetNumberOfPatchArrays(); ++i)
+  {
+    std::string displayName(reader->GetPatchArrayName(i));
+    auto slash = displayName.rfind('/');
+
+    if (displayName.compare(0, slash, "lagrangian") == 0 && slash != std::string::npos)
+    {
+      ++slash;
+      std::string cloudName(displayName.substr(slash));
+      std::cout << "  Display " << displayName << " = Cloud <" << cloudName << ">" << std::endl;
+
+      auto* cloudData = findBlock<vtkPolyData>(lagrangianBlocks, cloudName.c_str());
+
+      if (cloudData)
+      {
+        ++nClouds;
+        nParticles += cloudData->GetNumberOfPoints();
+      }
+    }
+  }
+  std::cout << "  Read " << nParticles << " particles from " << nClouds << " clouds" << std::endl;
+
+  int retVal = (nParticles != 0);
+
+  return !retVal;
+}
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/CH4.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/CH4.sha512
new file mode 100644
index 00000000000..e37be36d100
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/CH4.sha512
@@ -0,0 +1 @@
+98386a7ee606e9a04184131f1530b353f832c4b167bc599456cb90f4ad9dcdf97478cf2192731fe8871f5dc68210710e84fe39f05064babd2c367bd610db3529
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/CO2.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/CO2.sha512
new file mode 100644
index 00000000000..45c4138ea92
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/CO2.sha512
@@ -0,0 +1 @@
+efb914d852fef74290806d1fadca64ca6cee4253bf469e5baeef70c1a006ba762625a08b88d2143c55568d4f927b6d83cf9bdd246cb80991f1c3925dc79b174c
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/H2.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/H2.sha512
new file mode 100644
index 00000000000..f91f1bc5678
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/H2.sha512
@@ -0,0 +1 @@
+2ac111ea8e217f8f180a54714df459664ee89acb07d9f7e0df5887bfe6c2d9f2a22c915973b94c6109ba44d4d7774b109a6ed5e7198d7b94404446ec9b41483a
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/H2O.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/H2O.sha512
new file mode 100644
index 00000000000..f6f53bc7923
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/H2O.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/N2.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/N2.sha512
new file mode 100644
index 00000000000..c70d7bd1b28
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/N2.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/O2.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/O2.sha512
new file mode 100644
index 00000000000..b1c79d0b410
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/O2.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/T.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/T.sha512
new file mode 100644
index 00000000000..42870d9e29f
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/T.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/U.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/U.sha512
new file mode 100644
index 00000000000..49c40058031
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/U.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Cp.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Cp.sha512
new file mode 100644
index 00000000000..b3a05fdee69
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Cp.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/T.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/T.sha512
new file mode 100644
index 00000000000..151ee70070a
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/T.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/U.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/U.sha512
new file mode 100644
index 00000000000..221be39b71a
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/U.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/UCorrect.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/UCorrect.sha512
new file mode 100644
index 00000000000..afbef4aa869
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/UCorrect.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/UTurb.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/UTurb.sha512
new file mode 100644
index 00000000000..7f1f4fcb244
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/UTurb.sha512
@@ -0,0 +1 @@
+cae1d6207a83bb0a6caac99c921de88a8f0e089b6f86ed45dd930d25b4023e8657f19ec7d4b895a9e438a331b22457b38be25ccd4b6697ce54c0da2f3e76588d
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Ygas.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Ygas.sha512
new file mode 100644
index 00000000000..ec24eb60b9b
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Ygas.sha512
@@ -0,0 +1 @@
+97bbd490cffa78081737af2cc4d4c9e66f743589915149e5b88bb98fe1967c58638a06a68d47fa5d9fff3bf6ecbccfc4dff361935e9fe6377aeb4269ec20580c
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Yliquid.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Yliquid.sha512
new file mode 100644
index 00000000000..c04e57efcb4
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Yliquid.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Ysolid.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Ysolid.sha512
new file mode 100644
index 00000000000..6e945aa6cb8
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/Ysolid.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/active.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/active.sha512
new file mode 100644
index 00000000000..99949f658f7
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/active.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/age.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/age.sha512
new file mode 100644
index 00000000000..a9e477b5574
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/age.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/coordinates.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/coordinates.sha512
new file mode 100644
index 00000000000..072c4fa0ea0
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/coordinates.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/d.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/d.sha512
new file mode 100644
index 00000000000..24e70485793
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/d.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/dTarget.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/dTarget.sha512
new file mode 100644
index 00000000000..dfc810216fb
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/dTarget.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/mass0.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/mass0.sha512
new file mode 100644
index 00000000000..67b8eab800a
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/mass0.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/nParticle.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/nParticle.sha512
new file mode 100644
index 00000000000..66dfb399431
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/nParticle.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/origId.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/origId.sha512
new file mode 100644
index 00000000000..0bbb100bf55
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/origId.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/origProcId.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/origProcId.sha512
new file mode 100644
index 00000000000..9c31a349411
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/origProcId.sha512
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/positions.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/positions.sha512
new file mode 100644
index 00000000000..e3ee6ba7447
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+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/positions.sha512
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/rho.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/rho.sha512
new file mode 100644
index 00000000000..aec975a0422
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/rho.sha512
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/tTurb.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/tTurb.sha512
new file mode 100644
index 00000000000..31605d94048
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/tTurb.sha512
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/typeId.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/typeId.sha512
new file mode 100644
index 00000000000..63176dda79d
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/typeId.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/Cp.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/Cp.sha512
new file mode 100644
index 00000000000..36439bd1c29
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/Cp.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/T.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/T.sha512
new file mode 100644
index 00000000000..f902d87210d
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/T.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/U.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/U.sha512
new file mode 100644
index 00000000000..e6785194ec0
--- /dev/null
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/T.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/T.sha512
new file mode 100644
index 00000000000..52f4506d4b9
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/T.sha512
@@ -0,0 +1 @@
+5d0ba19d119e8c646e53382a193e497b00d7ff1b7717394a78c37ef10c9e31e6dd7a4252a0716999c3b132b397463a22d4683ad216b4bb9bead1358ff5bc1ded
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/U.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/U.sha512
new file mode 100644
index 00000000000..2843de33872
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/U.sha512
@@ -0,0 +1 @@
+ad876b32e2494d945337c0ee9a1f4a12573d170314fd4ff454f45943f9b20e16f60bae71e4ea17d53853292e7b83e59bee6ca9cee48e9ef246ab3446bd058f38
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/alphat.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/alphat.sha512
new file mode 100644
index 00000000000..98425a910e4
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/alphat.sha512
@@ -0,0 +1 @@
+64531d859a8c158c3d5fdcd168527b23e3b23da5e7656386cc485e19d5f188acc77a52c3d17029d4976c736cdb0413c648023a71c124b2b0fa62d6260334604f
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/epsilon.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/epsilon.sha512
new file mode 100644
index 00000000000..3b30ba65bdd
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/epsilon.sha512
@@ -0,0 +1 @@
+3d85cde338d4ee663d6373d9c74d3aefdba94a7a5606f1956d586bfd9665e5d97c02bba488e4a0feadc40d207978828a26897452d56d891c549c386d75fa4f53
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/k.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/k.sha512
new file mode 100644
index 00000000000..6ec5a33fe7b
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/k.sha512
@@ -0,0 +1 @@
+32cd9cb747088decfd6255e49119cc1e4113880c129762108613eeca6f25103b4759bf5c279c3512cdbb7ec94978fba9e6a0f02149cf65d5966b7ee6feda4865
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/nut.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/nut.sha512
new file mode 100644
index 00000000000..c35f16ad962
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/nut.sha512
@@ -0,0 +1 @@
+de93c33ae81926a6c1761e46aec71f47fac10d4aeb463549ee687d5044241999d6943cbd3b5d82d8f1ad7ee07eab11ac80cd4cb4414d41f85462e46d8f357288
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/p.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/p.sha512
new file mode 100644
index 00000000000..12c1c1b0a9a
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/0/p.sha512
@@ -0,0 +1 @@
+04de895ccdd1efb126a73328997d1180150a1e57c1bcb81b463317801eb5539d83a503c7eb63e3d257aeac260d5724a0766169e691fd4d45fa902fe86798f030
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/boundary.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/boundary.sha512
new file mode 100644
index 00000000000..6a1341e83b3
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/boundary.sha512
@@ -0,0 +1 @@
+ae10a22e8f891178b93fad6c1914a948845c9d1b2aa9f45ea33179a3c68dd9d216fa812db4fd662ce0427b15a8d7025a9a498b20d38a3ee9d5f27e5be02b32b1
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/faces.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/faces.sha512
new file mode 100644
index 00000000000..c289a05cdab
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/faces.sha512
@@ -0,0 +1 @@
+fc1baef4ebcedae780176330d607824372aaeed9a26e396ff56e64830f2377869edb46e992e8c30bd19dcd495a1d79f84300cf0d3ba821d5edf5bb15065db5f7
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/neighbour.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/neighbour.sha512
new file mode 100644
index 00000000000..8b6df9531bb
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/neighbour.sha512
@@ -0,0 +1 @@
+d597149a6f468d0de2cedee321cbbfbaa39c08dfa39eb30573da4942a47ca3927ff1d455ff8a54bd9e9aa807ade5b625b16ecabf344d00421499f4d5ac1a9211
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/owner.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/owner.sha512
new file mode 100644
index 00000000000..8ac2c87a8b8
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/owner.sha512
@@ -0,0 +1 @@
+ce4a00f8896da76b072cf1d403115569b087f71f7b245bee69ed06abf5ae3ee4e16ed944ea164276b9fbb8573591735790a493808637312fb00b522631d4e9c7
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/points.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/points.sha512
new file mode 100644
index 00000000000..7443f0bbe79
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/points.sha512
@@ -0,0 +1 @@
+f9462176941ccd588a11a3de936b693229639bd220070a69da5f2bbff781b03b4d872243418dd65f9aa8bbc9363167251c8dde1e419c4fcd631184d9fcb7be13
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/system/controlDict.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/system/controlDict.sha512
new file mode 100644
index 00000000000..f7f6aa8eb97
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/system/controlDict.sha512
@@ -0,0 +1 @@
+6f6c4d8b83674d1eec7e5b7ef54ab530bf3d3050b7f9e031d6eaefaeaca07e12f946430afa383ad12b62644f51b71bdaad36afd49e55570b8c09ec88de946d36
-- 
GitLab


From 13fa2cb014824b75e953fb56f2f385537f113327 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Thu, 25 Mar 2021 14:04:39 +0100
Subject: [PATCH 27/36] openfoam: adjust face/owner reading

- handling of really old-format caused inadvertent short-circuit.
  Also check neighbour for max cell id.

- preserve face point order when flipping.

  When faces are flipped (reversed) in OpenFOAM, the face point 0 is
  preserved to ensure a consistent and predictable walk order.
  Probably less important to preserve for VTK, but may help in future
  and doesn't add any overhead to so.

- some code simplication for inserting polyhedral cells.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 187 +++++++++++++++++-------------
 1 file changed, 107 insertions(+), 80 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index b73fe246522..a78e1be0e1b 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -6710,6 +6710,9 @@ bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& timeRe
   }
   const bool use64BitLabels = io.IsLabel64();
 
+  // Count cells by tracking the max cell id seen
+  vtkTypeInt64 nCells = -1;
+
   {
     vtkFoamEntryValue ownerDict(nullptr);
     ownerDict.SetStreamOption(io);
@@ -6738,8 +6741,7 @@ bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& timeRe
     this->FaceOwner = ownerDict.ReleasePtr<vtkDataArray>();
     const vtkIdType nFaces = this->FaceOwner->GetNumberOfTuples();
 
-    // Count cells, check validity
-    vtkTypeInt64 nCells = -1;
+    // Check for max cell, check validity
     for (vtkIdType facei = 0; facei < nFaces; ++facei)
     {
       const vtkTypeInt64 celli = GetLabelValue(this->FaceOwner, facei, use64BitLabels);
@@ -6753,8 +6755,6 @@ bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& timeRe
         nCells = celli; // <- max(nCells, celli)
       }
     }
-
-    this->NumCells = static_cast<vtkIdType>(++nCells);
   }
 
   // Read polyMesh/neighbour
@@ -6816,23 +6816,27 @@ bool vtkOpenFOAMReaderPrivate::ReadOwnerNeighbourFiles(const std::string& timeRe
       }
       this->FaceNeigh->Resize(nInternalFaces);
     }
-    else
-    {
-      // Check validity
-      const vtkIdType nInternalFaces = this->FaceNeigh->GetNumberOfTuples();
 
-      for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
+    const vtkIdType nInternalFaces = this->FaceNeigh->GetNumberOfTuples();
+
+    // Check for max cell, check validity
+    for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
+    {
+      const vtkTypeInt64 celli = GetLabelValue(this->FaceNeigh, facei, use64BitLabels);
+      if (celli < 0)
       {
-        const vtkTypeInt64 celli = GetLabelValue(this->FaceNeigh, facei, use64BitLabels);
-        if (celli < 0)
-        {
-          vtkErrorMacro(<< "Illegal cell label in neighbour addressing. Face " << facei);
-          return false;
-        }
+        vtkErrorMacro(<< "Illegal cell label in neighbour addressing. Face " << facei);
+        return false;
+      }
+      if (nCells < celli)
+      {
+        nCells = celli; // <- max(nCells, celli)
       }
     }
   }
 
+  this->NumCells = static_cast<vtkIdType>(++nCells);
+
   // Size checks
   if (this->NumCells == 0)
   {
@@ -6906,6 +6910,14 @@ std::unique_ptr<vtkFoamLabelListList> vtkOpenFOAMReaderPrivate::CreateCellFaces(
         nCells = celli; // <- max(nCells, celli)
       }
     }
+    for (vtkIdType facei = 0; facei < nInternalFaces; ++facei)
+    {
+      const vtkTypeInt64 celli = GetLabelValue(&faceNeigh, facei, use64BitLabels);
+      if (nCells < celli)
+      {
+        nCells = celli; // <- max(nCells, celli)
+      }
+    }
 
     // Set the number of cells
     this->NumCells = static_cast<vtkIdType>(++nCells);
@@ -7168,6 +7180,9 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
     // Jordan, with lots of improvements. Not as elegant as the one in
     // OpenFOAM but it's simple and works reasonably fast.
 
+    // Note: faces are flipped around their 0 point (as per OpenFOAM)
+    // to keep predicable face point ordering
+
     // OpenFOAM "hex" | vtkHexahedron
     if (cellType == VTK_HEXAHEDRON)
     {
@@ -7180,16 +7195,17 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
         meshFaces.GetCell(cellFacei, facePoints);
 
         // Add face0 to cell points - flip owner to point inwards
+        cellPoints[nCellPoints++] = facePoints[0];
         if (isOwner)
         {
-          for (int fp = 3; fp >= 0; --fp)
+          for (int fp = 3; fp > 0; --fp)
           {
             cellPoints[nCellPoints++] = facePoints[fp];
           }
         }
         else
         {
-          for (int fp = 0; fp < 4; ++fp)
+          for (int fp = 1; fp < 4; ++fp)
           {
             cellPoints[nCellPoints++] = facePoints[fp];
           }
@@ -7346,16 +7362,17 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
         // Add face0 to cell points - flip neighbour to point outwards
         // - OpenFOAM face0 points inwards
         // - VTK face0 points outwards
+        cellPoints[nCellPoints++] = facePoints[0];
         if (isOwner)
         {
-          for (int fp = 0; fp < 3; ++fp)
+          for (int fp = 1; fp < 3; ++fp)
           {
             cellPoints[nCellPoints++] = facePoints[fp];
           }
         }
         else
         {
-          for (int fp = 2; fp >= 0; --fp)
+          for (int fp = 2; fp > 0; --fp)
           {
             cellPoints[nCellPoints++] = facePoints[fp];
           }
@@ -7508,8 +7525,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
     // OpenFOAM "pyr" | vtkPyramid || OpenFOAM "tet" | vtkTetrahedron
     else if (cellType == VTK_PYRAMID || cellType == VTK_TETRA)
     {
-      const vtkIdType nCellPoints = (cellType == VTK_PYRAMID ? 5 : 4);
-
+      int nCellPoints = 0;
       int baseFaceId = 0;
       if (cellType == VTK_PYRAMID)
       {
@@ -7531,18 +7547,19 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
         meshFaces.GetCell(cellFacei, facePoints);
         const size_t nFacePoints = facePoints.size();
 
+        cellPoints[nCellPoints++] = facePoints[0];
         if (isOwner)
         {
-          for (size_t fp = 0, endp = nFacePoints - 1; fp < nFacePoints; ++fp, --endp)
+          for (size_t fp = nFacePoints - 1; fp > 0; --fp)
           {
-            cellPoints[fp] = facePoints[endp];
+            cellPoints[nCellPoints++] = facePoints[fp];
           }
         }
         else
         {
-          for (size_t fp = 0; fp < nFacePoints; ++fp)
+          for (size_t fp = 1; fp < nFacePoints; ++fp)
           {
-            cellPoints[fp] = facePoints[fp];
+            cellPoints[nCellPoints++] = facePoints[fp];
           }
         }
       }
@@ -7570,7 +7587,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
       }
 
       // ... and add the apex-point
-      cellPoints[nCellPoints - 1] = apexMeshPointi;
+      cellPoints[nCellPoints++] = apexMeshPointi;
 
       // Add tetra or pyramid to the mesh
       internalMesh->InsertNextCell(cellType, nCellPoints, cellPoints.data());
@@ -7653,9 +7670,12 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
         pointArray->InsertNextTuple(centroid);
 
         // polyhedron decomposition.
-        // a tweaked algorithm based on applications/utilities/postProcessing/
-        // graphics/PVFoamReader/vtkFoam/vtkFoamAddInternalMesh.C
-        bool insertDecomposedCell = true;
+        // a tweaked algorithm based on OpenFOAM
+        // src/fileFormats/vtk/part/foamVtuSizingTemplates.C
+
+        // TODO: improve consistency of face point ordering.
+        // - currently just flips the faces without preserving the face point 0 order.
+        bool firstCell = true;
         int nAdditionalCells = 0;
         for (size_t facei = 0; facei < cellFaces.size(); ++facei)
         {
@@ -7699,10 +7719,9 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
 
           cellPoints[0] = facePoints[(vertI == 2) ? static_cast<vtkIdType>(0)
                                                   : static_cast<vtkIdType>(nFacePoints - 1)];
-          cellPoints[4] = static_cast<vtkIdType>(this->NumPoints + nAdditionalPoints);
+          cellPoints[4] = static_cast<vtkIdType>(this->NumPoints + nAdditionalPoints); // apex
 
-          // decompose a face into quads in order (flipping the
-          // decomposed face if owner)
+          // Decompose a face into quads in order (flipping decomposed face if owner)
           const size_t nQuadVerts = nFacePoints - 1 - nTris;
           for (; vertI < nQuadVerts; vertI += 2)
           {
@@ -7710,13 +7729,12 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
             cellPoints[2] = facePoints[vertI];
             cellPoints[3] = facePoints[vertI + flipNeighbor];
 
-            // if the decomposed cell is the first one insert it to
-            // the original position; or append to the decomposed cell
-            // list otherwise
-            if (insertDecomposedCell)
+            // Insert first decomposed cell into the original position,
+            // subsequent ones are appended to the decomposed cell list
+            if (firstCell)
             {
+              firstCell = false;
               internalMesh->InsertNextCell(VTK_PYRAMID, 5, cellPoints.data());
-              insertDecomposedCell = false;
             }
             else
             {
@@ -7728,7 +7746,7 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
           // if the number of vertices is odd there's a triangle
           if (nTris)
           {
-            if (flipNeighbor == -1)
+            if (flipNeighbor == -1) // isOwner
             {
               cellPoints[1] = facePoints[vertI];
               cellPoints[2] = facePoints[vertI - 1];
@@ -7740,10 +7758,12 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
             }
             cellPoints[3] = static_cast<vtkIdType>(this->NumPoints + nAdditionalPoints);
 
-            if (insertDecomposedCell)
+            // Insert first decomposed cell into the original position,
+            // subsequent ones are appended to the decomposed cell list
+            if (firstCell)
             {
+              firstCell = false;
               internalMesh->InsertNextCell(VTK_TETRA, 4, cellPoints.data());
-              insertDecomposedCell = false;
             }
             else
             {
@@ -7770,8 +7790,10 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
         // - use nPolyPoints to estimate unique cell points
         //   (assume a point connects at least three faces)
 
-        cellPoints.fast_reserve(nPolyPoints / 3);
-        polyPoints.fast_reserve(nPolyPoints + cellFaces.size());
+        cellPoints.copy_resize(0);
+        polyPoints.copy_resize(0);
+        cellPoints.copy_reserve(nPolyPoints / 3);
+        polyPoints.copy_reserve(nPolyPoints + cellFaces.size());
 
         size_t nCellPoints = 0;
         nPolyPoints = 0; // Reset
@@ -7783,46 +7805,51 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
             (cellId == GetLabelValue(this->FaceOwner, cellFacei, faceOwner64Bit));
           meshFaces.GetCell(cellFacei, facePoints);
           const size_t nFacePoints = facePoints.size();
+          size_t nUnique = 0;
+
+          // Pass 1: add face points, and mark up duplicates on the way
 
-          // Local face point indexing - must be signed
-          // Flip direction for neighbour face
-          int facePointi = (isOwner ? 0 : static_cast<int>(nFacePoints) - 1);
-          const int faceDirn = (isOwner ? 1 : -1);
+          polyPoints.copy_resize(nPolyPoints + nFacePoints + 1);
+          polyPoints[nPolyPoints++] = static_cast<vtkIdType>(nFacePoints);
 
-          if (!nCellPoints && !nPolyPoints)
+          if (!nFacePoints)
           {
-            // First face - add directly (no duplicate points)
-            cellPoints.copy_resize(nCellPoints + nFacePoints);
-            polyPoints.copy_resize(nPolyPoints + nFacePoints + 1);
+            continue;
+          }
 
-            // Add face to cell points, and to polyPoints
-            polyPoints[nPolyPoints++] = static_cast<vtkIdType>(nFacePoints);
-            for (size_t fp = 0; fp < nFacePoints; ++fp, facePointi += faceDirn)
+          // Add face point 0
+          {
+            const auto meshPointi = static_cast<vtkIdType>(facePoints[0]);
+            polyPoints[nPolyPoints++] = meshPointi;
+            bool isUnique = true;
+            for (size_t cp = 0; isUnique && cp < nCellPoints; ++cp)
             {
-              const auto meshPointi = static_cast<vtkIdType>(facePoints[facePointi]);
-              cellPoints[nCellPoints++] = meshPointi;
-              polyPoints[nPolyPoints++] = meshPointi;
+              isUnique = (meshPointi != cellPoints[cp]);
+            }
+            if (isUnique)
+            {
+              ++nUnique;
+            }
+            else
+            {
+              facePoints[0] = -1; // Duplicate
             }
           }
-          else
-          {
-            // Subsequent faces - avoid duplicate points
 
-            // Pass 1: add face points, and mark up any duplicates too
-            // Grow if needed, preserve content
-            polyPoints.copy_resize(nPolyPoints + nFacePoints + 1);
+          // Add other face points
+          {
+            // Local face point indexing - must be signed
+            const int faceDirn = (isOwner ? 1 : -1); // Flip direction for neighbour face
+            int facePointi = (isOwner ? 1 : static_cast<int>(nFacePoints) - 1);
 
-            // Add face to poly (face) points
-            polyPoints[nPolyPoints++] = static_cast<vtkIdType>(nFacePoints);
-            size_t nUnique = 0;
-            for (size_t fp = 0; fp < nFacePoints; ++fp, facePointi += faceDirn)
+            for (size_t fp = 1; fp < nFacePoints; ++fp, facePointi += faceDirn)
             {
               const auto meshPointi = static_cast<vtkIdType>(facePoints[facePointi]);
               polyPoints[nPolyPoints++] = meshPointi;
               bool isUnique = true;
               for (size_t cp = 0; isUnique && cp < nCellPoints; ++cp)
               {
-                isUnique = (cellPoints[cp] != meshPointi);
+                isUnique = (meshPointi != cellPoints[cp]);
               }
               if (isUnique)
               {
@@ -7833,18 +7860,17 @@ void vtkOpenFOAMReaderPrivate::InsertCellsToGrid(
                 facePoints[facePointi] = -1; // Duplicate
               }
             }
+          }
 
-            // Grow if needed, preserve content
-            cellPoints.copy_resize(nCellPoints + nUnique);
+          cellPoints.copy_resize(nCellPoints + nUnique);
 
-            // Pass 2: add unique cell points - order is arbitrary
-            for (size_t fp = 0; fp < nFacePoints; ++fp)
+          // Pass 2: add unique cell points - order is arbitrary
+          for (size_t fp = 0; fp < nFacePoints; ++fp)
+          {
+            const auto meshPointi = static_cast<vtkIdType>(facePoints[fp]);
+            if (meshPointi != -1) // isUnique
             {
-              const auto meshPointi = static_cast<vtkIdType>(facePoints[fp]);
-              if (meshPointi != -1) // isUnique
-              {
-                cellPoints[nCellPoints++] = meshPointi;
-              }
+              cellPoints[nCellPoints++] = meshPointi;
             }
           }
         }
@@ -8550,7 +8576,7 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry&
       }
       else
       {
-        vtkErrorMacro(<< "Wrong list type for uniform field");
+        vtkErrorMacro(<< "Wrong list type for uniform field: " << io.GetObjectName());
         return nullptr;
       }
 
@@ -8567,7 +8593,7 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry&
       }
       else
       {
-        vtkErrorMacro(<< "Number of components and field class doesn't match "
+        vtkErrorMacro(<< "Number of components and field class do not match "
                       << "for " << io.GetFileName() << ". class = " << className
                       << ", nComponents = " << nComponents);
         return nullptr;
@@ -8584,8 +8610,9 @@ vtkSmartPointer<vtkFloatArray> vtkOpenFOAMReaderPrivate::FillField(vtkFoamEntry&
       const vtkIdType nTuples = entry.ScalarList().GetNumberOfTuples();
       if (nTuples != nElements)
       {
-        vtkErrorMacro(<< "Number of cells/points in mesh and field don't match: "
-                      << "mesh = " << nElements << ", field = " << nTuples);
+        vtkErrorMacro(<< "Number of cells/points in mesh and field do not match: "
+                      << "mesh = " << nElements << ", field = " << nTuples << " in "
+                      << io.GetObjectName());
         return nullptr;
       }
 
-- 
GitLab


From bd052f0e5eac7713e9fa09c03d6097e8e14b1b68 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Tue, 23 Mar 2021 17:03:15 +0100
Subject: [PATCH 28/36] Additional openfoam tests. Mostly working

---
 IO/Geometry/Testing/CMakeLists.txt            |  76 +++++----
 IO/Geometry/Testing/Cxx/CMakeLists.txt        |   3 +
 .../Cxx/TestOpenFOAMReaderFaceZone.cxx        | 160 ++++++++++++++++++
 .../TestOpenFOAMReaderLagrangianSerial.cxx    |  20 ++-
 .../Cxx/TestOpenFOAMReaderLargePolyhedral.cxx | 102 +++++++++++
 .../Cxx/TestOpenFOAMReaderValuePointPatch.cxx | 130 ++++++++++++++
 IO/Parallel/Testing/Cxx/CMakeLists.txt        |   2 +
 ...estPOpenFOAMReaderLagrangianUncollated.cxx | 157 +++++++++++++++++
 .../2002/pointLocations.sha512                |   1 +
 .../largePolyhedral/2002/uniform/time.sha512  |   1 +
 .../constant/polyMesh/boundary.sha512         |   1 +
 .../constant/polyMesh/faces.sha512            |   1 +
 .../constant/polyMesh/neighbour.sha512        |   1 +
 .../constant/polyMesh/owner.sha512            |   1 +
 .../constant/polyMesh/points.sha512           |   1 +
 .../largePolyhedral.foam.sha512               |   1 +
 .../largePolyhedral/system/controlDict.sha512 |   1 +
 .../largePolyhedral/system/fvSchemes.sha512   |   1 +
 .../largePolyhedral/system/fvSolution.sha512  |   1 +
 .../processor0/0.005/CH4.sha512               |   1 +
 .../processor0/0.005/CO2.sha512               |   1 +
 .../processor0/0.005/H2.sha512                |   1 +
 .../processor0/0.005/H2O.sha512               |   1 +
 .../processor0/0.005/N2.sha512                |   1 +
 .../processor0/0.005/O2.sha512                |   1 +
 .../processor0/0.005/T.sha512                 |   1 +
 .../processor0/0.005/U.sha512                 |   1 +
 .../0.005/lagrangian/coalCloud1/Cp.sha512     |   1 +
 .../0.005/lagrangian/coalCloud1/T.sha512      |   1 +
 .../0.005/lagrangian/coalCloud1/U.sha512      |   1 +
 .../lagrangian/coalCloud1/UCorrect.sha512     |   1 +
 .../0.005/lagrangian/coalCloud1/UTurb.sha512  |   1 +
 .../0.005/lagrangian/coalCloud1/Ygas.sha512   |   1 +
 .../lagrangian/coalCloud1/Yliquid.sha512      |   1 +
 .../0.005/lagrangian/coalCloud1/Ysolid.sha512 |   1 +
 .../0.005/lagrangian/coalCloud1/active.sha512 |   1 +
 .../0.005/lagrangian/coalCloud1/age.sha512    |   1 +
 .../lagrangian/coalCloud1/coordinates.sha512  |   1 +
 .../0.005/lagrangian/coalCloud1/d.sha512      |   1 +
 .../lagrangian/coalCloud1/dTarget.sha512      |   1 +
 .../0.005/lagrangian/coalCloud1/mass0.sha512  |   1 +
 .../lagrangian/coalCloud1/nParticle.sha512    |   1 +
 .../0.005/lagrangian/coalCloud1/origId.sha512 |   1 +
 .../lagrangian/coalCloud1/origProcId.sha512   |   1 +
 .../lagrangian/coalCloud1/positions.sha512    |   1 +
 .../0.005/lagrangian/coalCloud1/rho.sha512    |   1 +
 .../0.005/lagrangian/coalCloud1/tTurb.sha512  |   1 +
 .../0.005/lagrangian/coalCloud1/typeId.sha512 |   1 +
 .../lagrangian/limestoneCloud1/Cp.sha512      |   1 +
 .../0.005/lagrangian/limestoneCloud1/T.sha512 |   1 +
 .../0.005/lagrangian/limestoneCloud1/U.sha512 |   1 +
 .../limestoneCloud1/UCorrect.sha512           |   1 +
 .../lagrangian/limestoneCloud1/UTurb.sha512   |   1 +
 .../lagrangian/limestoneCloud1/active.sha512  |   1 +
 .../lagrangian/limestoneCloud1/age.sha512     |   1 +
 .../limestoneCloud1/coordinates.sha512        |   1 +
 .../0.005/lagrangian/limestoneCloud1/d.sha512 |   1 +
 .../lagrangian/limestoneCloud1/dTarget.sha512 |   1 +
 .../limestoneCloud1/nParticle.sha512          |   1 +
 .../lagrangian/limestoneCloud1/origId.sha512  |   1 +
 .../limestoneCloud1/origProcId.sha512         |   1 +
 .../limestoneCloud1/positions.sha512          |   1 +
 .../lagrangian/limestoneCloud1/rho.sha512     |   1 +
 .../lagrangian/limestoneCloud1/tTurb.sha512   |   1 +
 .../lagrangian/limestoneCloud1/typeId.sha512  |   1 +
 .../processor0/0.005/p.sha512                 |   1 +
 .../processor0/0.005/rho.sha512               |   1 +
 .../processor0/0.01/CH4.sha512                |   1 +
 .../processor0/0.01/CO2.sha512                |   1 +
 .../processor0/0.01/H2.sha512                 |   1 +
 .../processor0/0.01/H2O.sha512                |   1 +
 .../processor0/0.01/N2.sha512                 |   1 +
 .../processor0/0.01/O2.sha512                 |   1 +
 .../processor0/0.01/T.sha512                  |   1 +
 .../processor0/0.01/U.sha512                  |   1 +
 .../0.01/lagrangian/coalCloud1/Cp.sha512      |   1 +
 .../0.01/lagrangian/coalCloud1/T.sha512       |   1 +
 .../0.01/lagrangian/coalCloud1/U.sha512       |   1 +
 .../lagrangian/coalCloud1/UCorrect.sha512     |   1 +
 .../0.01/lagrangian/coalCloud1/UTurb.sha512   |   1 +
 .../0.01/lagrangian/coalCloud1/Ygas.sha512    |   1 +
 .../0.01/lagrangian/coalCloud1/Yliquid.sha512 |   1 +
 .../0.01/lagrangian/coalCloud1/Ysolid.sha512  |   1 +
 .../0.01/lagrangian/coalCloud1/active.sha512  |   1 +
 .../0.01/lagrangian/coalCloud1/age.sha512     |   1 +
 .../lagrangian/coalCloud1/coordinates.sha512  |   1 +
 .../0.01/lagrangian/coalCloud1/d.sha512       |   1 +
 .../0.01/lagrangian/coalCloud1/dTarget.sha512 |   1 +
 .../0.01/lagrangian/coalCloud1/mass0.sha512   |   1 +
 .../lagrangian/coalCloud1/nParticle.sha512    |   1 +
 .../0.01/lagrangian/coalCloud1/origId.sha512  |   1 +
 .../lagrangian/coalCloud1/origProcId.sha512   |   1 +
 .../lagrangian/coalCloud1/positions.sha512    |   1 +
 .../0.01/lagrangian/coalCloud1/rho.sha512     |   1 +
 .../0.01/lagrangian/coalCloud1/tTurb.sha512   |   1 +
 .../0.01/lagrangian/coalCloud1/typeId.sha512  |   1 +
 .../0.01/lagrangian/limestoneCloud1/Cp.sha512 |   1 +
 .../0.01/lagrangian/limestoneCloud1/T.sha512  |   1 +
 .../0.01/lagrangian/limestoneCloud1/U.sha512  |   1 +
 .../limestoneCloud1/UCorrect.sha512           |   1 +
 .../lagrangian/limestoneCloud1/UTurb.sha512   |   1 +
 .../lagrangian/limestoneCloud1/active.sha512  |   1 +
 .../lagrangian/limestoneCloud1/age.sha512     |   1 +
 .../limestoneCloud1/coordinates.sha512        |   1 +
 .../0.01/lagrangian/limestoneCloud1/d.sha512  |   1 +
 .../lagrangian/limestoneCloud1/dTarget.sha512 |   1 +
 .../limestoneCloud1/nParticle.sha512          |   1 +
 .../lagrangian/limestoneCloud1/origId.sha512  |   1 +
 .../limestoneCloud1/origProcId.sha512         |   1 +
 .../limestoneCloud1/positions.sha512          |   1 +
 .../lagrangian/limestoneCloud1/rho.sha512     |   1 +
 .../lagrangian/limestoneCloud1/tTurb.sha512   |   1 +
 .../lagrangian/limestoneCloud1/typeId.sha512  |   1 +
 .../processor0/0.01/p.sha512                  |   1 +
 .../processor0/0.01/rho.sha512                |   1 +
 .../processor0/0/CH4.sha512                   |   1 +
 .../processor0/0/CO.sha512                    |   1 +
 .../processor0/0/CO2.sha512                   |   1 +
 .../processor0/0/H2.sha512                    |   1 +
 .../processor0/0/H2O.sha512                   |   1 +
 .../processor0/0/N2.sha512                    |   1 +
 .../processor0/0/O2.sha512                    |   1 +
 .../processor0/0/T.sha512                     |   1 +
 .../processor0/0/U.sha512                     |   1 +
 .../processor0/0/p.sha512                     |   1 +
 .../constant/polyMesh/boundary.sha512         |   1 +
 .../processor0/constant/polyMesh/faces.sha512 |   1 +
 .../constant/polyMesh/neighbour.sha512        |   1 +
 .../processor0/constant/polyMesh/owner.sha512 |   1 +
 .../constant/polyMesh/points.sha512           |   1 +
 .../processor1/0.005/CH4.sha512               |   1 +
 .../processor1/0.005/CO2.sha512               |   1 +
 .../processor1/0.005/H2.sha512                |   1 +
 .../processor1/0.005/H2O.sha512               |   1 +
 .../processor1/0.005/N2.sha512                |   1 +
 .../processor1/0.005/O2.sha512                |   1 +
 .../processor1/0.005/T.sha512                 |   1 +
 .../processor1/0.005/U.sha512                 |   1 +
 .../processor1/0.005/p.sha512                 |   1 +
 .../processor1/0.005/rho.sha512               |   1 +
 .../processor1/0.01/CH4.sha512                |   1 +
 .../processor1/0.01/CO2.sha512                |   1 +
 .../processor1/0.01/H2.sha512                 |   1 +
 .../processor1/0.01/H2O.sha512                |   1 +
 .../processor1/0.01/N2.sha512                 |   1 +
 .../processor1/0.01/O2.sha512                 |   1 +
 .../processor1/0.01/T.sha512                  |   1 +
 .../processor1/0.01/U.sha512                  |   1 +
 .../processor1/0.01/p.sha512                  |   1 +
 .../processor1/0.01/rho.sha512                |   1 +
 .../processor1/0/CH4.sha512                   |   1 +
 .../processor1/0/CO.sha512                    |   1 +
 .../processor1/0/CO2.sha512                   |   1 +
 .../processor1/0/H2.sha512                    |   1 +
 .../processor1/0/H2O.sha512                   |   1 +
 .../processor1/0/N2.sha512                    |   1 +
 .../processor1/0/O2.sha512                    |   1 +
 .../processor1/0/T.sha512                     |   1 +
 .../processor1/0/U.sha512                     |   1 +
 .../processor1/0/p.sha512                     |   1 +
 .../constant/polyMesh/boundary.sha512         |   1 +
 .../processor1/constant/polyMesh/faces.sha512 |   1 +
 .../constant/polyMesh/neighbour.sha512        |   1 +
 .../processor1/constant/polyMesh/owner.sha512 |   1 +
 .../constant/polyMesh/points.sha512           |   1 +
 .../processor2/0.005/CH4.sha512               |   1 +
 .../processor2/0.005/CO2.sha512               |   1 +
 .../processor2/0.005/H2.sha512                |   1 +
 .../processor2/0.005/H2O.sha512               |   1 +
 .../processor2/0.005/N2.sha512                |   1 +
 .../processor2/0.005/O2.sha512                |   1 +
 .../processor2/0.005/T.sha512                 |   1 +
 .../processor2/0.005/U.sha512                 |   1 +
 .../processor2/0.005/p.sha512                 |   1 +
 .../processor2/0.005/rho.sha512               |   1 +
 .../processor2/0.01/CH4.sha512                |   1 +
 .../processor2/0.01/CO2.sha512                |   1 +
 .../processor2/0.01/H2.sha512                 |   1 +
 .../processor2/0.01/H2O.sha512                |   1 +
 .../processor2/0.01/N2.sha512                 |   1 +
 .../processor2/0.01/O2.sha512                 |   1 +
 .../processor2/0.01/T.sha512                  |   1 +
 .../processor2/0.01/U.sha512                  |   1 +
 .../processor2/0.01/p.sha512                  |   1 +
 .../processor2/0.01/rho.sha512                |   1 +
 .../processor2/0/CH4.sha512                   |   1 +
 .../processor2/0/CO.sha512                    |   1 +
 .../processor2/0/CO2.sha512                   |   1 +
 .../processor2/0/H2.sha512                    |   1 +
 .../processor2/0/H2O.sha512                   |   1 +
 .../processor2/0/N2.sha512                    |   1 +
 .../processor2/0/O2.sha512                    |   1 +
 .../processor2/0/T.sha512                     |   1 +
 .../processor2/0/U.sha512                     |   1 +
 .../processor2/0/p.sha512                     |   1 +
 .../constant/polyMesh/boundary.sha512         |   1 +
 .../processor2/constant/polyMesh/faces.sha512 |   1 +
 .../constant/polyMesh/neighbour.sha512        |   1 +
 .../processor2/constant/polyMesh/owner.sha512 |   1 +
 .../constant/polyMesh/points.sha512           |   1 +
 .../processor3/0.005/CH4.sha512               |   1 +
 .../processor3/0.005/CO2.sha512               |   1 +
 .../processor3/0.005/H2.sha512                |   1 +
 .../processor3/0.005/H2O.sha512               |   1 +
 .../processor3/0.005/N2.sha512                |   1 +
 .../processor3/0.005/O2.sha512                |   1 +
 .../processor3/0.005/T.sha512                 |   1 +
 .../processor3/0.005/U.sha512                 |   1 +
 .../processor3/0.005/p.sha512                 |   1 +
 .../processor3/0.005/rho.sha512               |   1 +
 .../processor3/0.01/CH4.sha512                |   1 +
 .../processor3/0.01/CO2.sha512                |   1 +
 .../processor3/0.01/H2.sha512                 |   1 +
 .../processor3/0.01/H2O.sha512                |   1 +
 .../processor3/0.01/N2.sha512                 |   1 +
 .../processor3/0.01/O2.sha512                 |   1 +
 .../processor3/0.01/T.sha512                  |   1 +
 .../processor3/0.01/U.sha512                  |   1 +
 .../processor3/0.01/p.sha512                  |   1 +
 .../processor3/0.01/rho.sha512                |   1 +
 .../processor3/0/CH4.sha512                   |   1 +
 .../processor3/0/CO.sha512                    |   1 +
 .../processor3/0/CO2.sha512                   |   1 +
 .../processor3/0/H2.sha512                    |   1 +
 .../processor3/0/H2O.sha512                   |   1 +
 .../processor3/0/N2.sha512                    |   1 +
 .../processor3/0/O2.sha512                    |   1 +
 .../processor3/0/T.sha512                     |   1 +
 .../processor3/0/U.sha512                     |   1 +
 .../processor3/0/p.sha512                     |   1 +
 .../constant/polyMesh/boundary.sha512         |   1 +
 .../processor3/constant/polyMesh/faces.sha512 |   1 +
 .../constant/polyMesh/neighbour.sha512        |   1 +
 .../processor3/constant/polyMesh/owner.sha512 |   1 +
 .../constant/polyMesh/points.sha512           |   1 +
 .../simplifiedSiwek-uncollated.foam           |   0
 .../system/controlDict.sha512                 |   1 +
 Testing/Data/OpenFOAM/squareBend/100/T.sha512 |   1 +
 Testing/Data/OpenFOAM/squareBend/100/U.sha512 |   1 +
 Testing/Data/OpenFOAM/squareBend/100/p.sha512 |   1 +
 .../Data/OpenFOAM/squareBend/100/phi.sha512   |   1 +
 .../Data/OpenFOAM/squareBend/100/rho.sha512   |   1 +
 Testing/Data/OpenFOAM/squareBend/50/T.sha512  |   1 +
 Testing/Data/OpenFOAM/squareBend/50/U.sha512  |   1 +
 Testing/Data/OpenFOAM/squareBend/50/p.sha512  |   1 +
 .../Data/OpenFOAM/squareBend/50/phi.sha512    |   1 +
 .../Data/OpenFOAM/squareBend/50/rho.sha512    |   1 +
 .../constant/polyMesh/boundary.sha512         |   1 +
 .../constant/polyMesh/cellZones.sha512        |   1 +
 .../constant/polyMesh/faceZones.sha512        |   1 +
 .../squareBend/constant/polyMesh/faces.sha512 |   1 +
 .../constant/polyMesh/neighbour.sha512        |   1 +
 .../squareBend/constant/polyMesh/owner.sha512 |   1 +
 .../constant/polyMesh/points.sha512           |   1 +
 .../squareBend/squareBend.foam.sha512         |   1 +
 .../squareBend/system/controlDict.sha512      |   1 +
 .../2002/pointLocations.sha512                |   1 +
 .../valuePointPatch/2002/uniform/time.sha512  |   1 +
 .../constant/polyMesh/boundary.sha512         |   1 +
 .../constant/polyMesh/faces.sha512            |   1 +
 .../constant/polyMesh/neighbour.sha512        |   1 +
 .../constant/polyMesh/owner.sha512            |   1 +
 .../constant/polyMesh/points.sha512           |   1 +
 .../valuePointPatch/system/controlDict.sha512 |   1 +
 .../valuePointPatch/system/fvSchemes.sha512   |   1 +
 .../valuePointPatch/system/fvSolution.sha512  |   1 +
 .../valuePointPatch.foam.sha512               |   1 +
 267 files changed, 873 insertions(+), 35 deletions(-)
 create mode 100644 IO/Geometry/Testing/Cxx/TestOpenFOAMReaderFaceZone.cxx
 create mode 100644 IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLargePolyhedral.cxx
 create mode 100644 IO/Geometry/Testing/Cxx/TestOpenFOAMReaderValuePointPatch.cxx
 create mode 100644 IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/2002/pointLocations.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/2002/uniform/time.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/boundary.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/faces.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/neighbour.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/owner.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/points.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/largePolyhedral.foam.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/system/controlDict.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/system/fvSchemes.sha512
 create mode 100644 Testing/Data/OpenFOAM/largePolyhedral/system/fvSolution.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Cp.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/UCorrect.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/UTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Ygas.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Yliquid.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Ysolid.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/active.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/age.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/coordinates.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/d.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/dTarget.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/mass0.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/nParticle.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/origId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/origProcId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/positions.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/tTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/typeId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/Cp.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/UCorrect.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/UTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/active.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/age.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/coordinates.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/d.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/dTarget.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/nParticle.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/origId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/origProcId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/positions.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/tTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/limestoneCloud1/typeId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/Cp.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/UCorrect.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/UTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/Ygas.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/Yliquid.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/Ysolid.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/active.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/age.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/coordinates.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/d.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/dTarget.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/mass0.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/nParticle.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/origId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/origProcId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/positions.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/tTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/coalCloud1/typeId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/Cp.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/UCorrect.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/UTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/active.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/age.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/coordinates.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/d.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/dTarget.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/nParticle.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/origId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/origProcId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/positions.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/tTurb.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/lagrangian/limestoneCloud1/typeId.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.01/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/CO.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/constant/polyMesh/boundary.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/constant/polyMesh/faces.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/constant/polyMesh/neighbour.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/constant/polyMesh/owner.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/constant/polyMesh/points.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.005/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0.01/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/CO.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/0/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/constant/polyMesh/boundary.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/constant/polyMesh/faces.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/constant/polyMesh/neighbour.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/constant/polyMesh/owner.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/constant/polyMesh/points.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.005/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0.01/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/CO.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/0/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/constant/polyMesh/boundary.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/constant/polyMesh/faces.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/constant/polyMesh/neighbour.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/constant/polyMesh/owner.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/constant/polyMesh/points.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.005/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0.01/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/CH4.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/CO.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/CO2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/H2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/H2O.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/N2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/O2.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/0/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/constant/polyMesh/boundary.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/constant/polyMesh/faces.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/constant/polyMesh/neighbour.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/constant/polyMesh/owner.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/constant/polyMesh/points.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/simplifiedSiwek-uncollated.foam
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/system/controlDict.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/100/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/100/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/100/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/100/phi.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/100/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/50/T.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/50/U.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/50/p.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/50/phi.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/50/rho.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/constant/polyMesh/boundary.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/constant/polyMesh/cellZones.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/constant/polyMesh/faceZones.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/constant/polyMesh/faces.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/constant/polyMesh/neighbour.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/constant/polyMesh/owner.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/constant/polyMesh/points.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/squareBend.foam.sha512
 create mode 100644 Testing/Data/OpenFOAM/squareBend/system/controlDict.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/2002/pointLocations.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/2002/uniform/time.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/constant/polyMesh/boundary.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/constant/polyMesh/faces.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/constant/polyMesh/neighbour.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/constant/polyMesh/owner.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/constant/polyMesh/points.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/system/controlDict.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/system/fvSchemes.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/system/fvSolution.sha512
 create mode 100644 Testing/Data/OpenFOAM/valuePointPatch/valuePointPatch.foam.sha512

diff --git a/IO/Geometry/Testing/CMakeLists.txt b/IO/Geometry/Testing/CMakeLists.txt
index 1ee0a7501e5..721a03333a4 100644
--- a/IO/Geometry/Testing/CMakeLists.txt
+++ b/IO/Geometry/Testing/CMakeLists.txt
@@ -3,48 +3,60 @@ vtk_module_test_data(
   Data/AMR/Enzo/DD0010/,REGEX:.*
   Data/IncOctPntLocData.dat
   Data/IncOctPntLocResult.dat
+
   Data/OpenFOAM/DimFields/cavity/,REGEX:.*
-  Data/OpenFOAM/DimFields/cavity/0/,REGEX:.*
-  Data/OpenFOAM/DimFields/cavity/constant/,REGEX:.*
-  Data/OpenFOAM/DimFields/cavity/constant/polyMesh/,REGEX:.*
   Data/OpenFOAM/DimFields/cavity/system/,REGEX:.*
+  Data/OpenFOAM/DimFields/cavity/constant/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/DimFields/cavity/0/,REGEX:.*
+
   Data/OpenFOAM/cavity/,REGEX:.*
-  Data/OpenFOAM/cavity/0/,REGEX:.*
-  Data/OpenFOAM/cavity/0.5/,REGEX:.*
-  Data/OpenFOAM/cavity/0.5/uniform/,REGEX:.*
-  Data/OpenFOAM/cavity/1/,REGEX:.*
-  Data/OpenFOAM/cavity/1/uniform/,REGEX:.*
-  Data/OpenFOAM/cavity/1.5/,REGEX:.*
-  Data/OpenFOAM/cavity/1.5/uniform/,REGEX:.*
-  Data/OpenFOAM/cavity/2.5/,REGEX:.*
-  Data/OpenFOAM/cavity/2.5/uniform/,REGEX:.*
-  Data/OpenFOAM/cavity/2/,REGEX:.*
-  Data/OpenFOAM/cavity/2/uniform/,REGEX:.*
-  Data/OpenFOAM/cavity/constant/,REGEX:.*
-  Data/OpenFOAM/cavity/constant/polyMesh/,REGEX:.*
   Data/OpenFOAM/cavity/system/,REGEX:.*
+  Data/OpenFOAM/cavity/constant/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/cavity/0/,REGEX:.*
+  Data/OpenFOAM/cavity/0.5/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/cavity/1/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/cavity/1.5/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/cavity/2/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/cavity/2.5/,RECURSE:,REGEX:.*$
+
   Data/OpenFOAM/precision/case01/,REGEX:.*
-  Data/OpenFOAM/precision/case01/0/,REGEX:.*
-  Data/OpenFOAM/precision/case01/constant/,REGEX:.*
-  Data/OpenFOAM/precision/case01/constant/polyMesh/,REGEX:.*
   Data/OpenFOAM/precision/case01/system/,REGEX:.*
+  Data/OpenFOAM/precision/case01/constant/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/precision/case01/0/,RECURSE:,REGEX:.*$
+
+  Data/OpenFOAM/largePolyhedral/,REGEX:.*
+  Data/OpenFOAM/largePolyhedral/system/,REGEX:.*
+  Data/OpenFOAM/largePolyhedral/constant/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/largePolyhedral/2002/,RECURSE:,REGEX:.*$
+
   Data/OpenFOAM/regex/,REGEX:.*
-  Data/OpenFOAM/regex/0/,REGEX:.*
-  Data/OpenFOAM/regex/constant/,REGEX:.*
-  Data/OpenFOAM/regex/constant/polyMesh/,REGEX:.*
   Data/OpenFOAM/regex/system/,REGEX:.*
-  Data/OpenFOAM/simplifiedSiwek-serial/constant/,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/constant/polyMesh/,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/0.01/,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/coalCloud1/,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/0.01/lagrangian/limestoneCloud1/,REGEX:.*$
+  Data/OpenFOAM/regex/constant/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/regex/0/,REGEX:.*
+
   Data/OpenFOAM/simplifiedSiwek-serial/system/,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/0.005/,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/coalCloud1/,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/0.005/lagrangian/limestoneCloud1/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/constant/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/simplifiedSiwek-serial/0/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.005/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0.01/,RECURSE:,REGEX:.*$
+
+  Data/OpenFOAM/simplifiedSiwek-uncollated/system/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/,RECURSE:,REGEX:.*$
+
+  Data/OpenFOAM/squareBend/,REGEX:.*
+  Data/OpenFOAM/squareBend/system/,REGEX:.*
+  Data/OpenFOAM/squareBend/constant/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/squareBend/50/,REGEX:.*
+  Data/OpenFOAM/squareBend/100/,REGEX:.*
+
+  Data/OpenFOAM/valuePointPatch/,REGEX:.*
+  Data/OpenFOAM/valuePointPatch/system/,REGEX:.*
+  Data/OpenFOAM/valuePointPatch/constant/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/valuePointPatch/2002/,RECURSE:,REGEX:.*$
+
   Data/TecPlot/,REGEX:.*
   Data/Viewpoint/cow.obj
   Data/absolute_indices.obj
diff --git a/IO/Geometry/Testing/Cxx/CMakeLists.txt b/IO/Geometry/Testing/Cxx/CMakeLists.txt
index 3f430fb17fa..47f62533c9b 100644
--- a/IO/Geometry/Testing/Cxx/CMakeLists.txt
+++ b/IO/Geometry/Testing/Cxx/CMakeLists.txt
@@ -14,9 +14,12 @@ vtk_add_test_cxx(vtkIOGeometryCxxTests tests
   TestOBJReaderSingleTexture.cxx,NO_VALID
   TestOpenFOAMReader.cxx
   TestOpenFOAMReaderDimensionedFields.cxx,NO_VALID
+  TestOpenFOAMReaderFaceZone.cxx
   TestOpenFOAMReaderLagrangianSerial.cxx,NO_VALID
+  TestOpenFOAMReaderLargePolyhedral.cxx,NO_VALID
   TestOpenFOAMReaderPrecision.cxx
   TestOpenFOAMReaderRegEx.cxx,NO_VALID
+  TestOpenFOAMReaderValuePointPatch.cxx
   TestProStarReader.cxx
   TestTecplotReader.cxx
   TestAMRReadWrite.cxx,NO_VALID
diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderFaceZone.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderFaceZone.cxx
new file mode 100644
index 00000000000..3504304c8ef
--- /dev/null
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderFaceZone.cxx
@@ -0,0 +1,160 @@
+/*=========================================================================
+
+  Program:   Visualization Toolkit
+  Module:    TestSimplePointsReaderWriter.cxx
+
+  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+  All rights reserved.
+  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notice for more information.
+
+=========================================================================*/
+
+#include "vtkOpenFOAMReader.h"
+
+#include "vtkCellData.h"
+#include "vtkInformation.h"
+#include "vtkMultiBlockDataSet.h"
+#include "vtkNew.h"
+#include "vtkPointData.h"
+#include "vtkPolyData.h"
+#include "vtkPolyDataMapper.h"
+#include "vtkProperty.h"
+#include "vtkRenderWindow.h"
+#include "vtkRenderWindowInteractor.h"
+#include "vtkRenderer.h"
+#include "vtkUnstructuredGrid.h"
+
+#include "vtkRegressionTestImage.h"
+#include "vtkTestUtilities.h"
+
+namespace
+{
+
+// Get any block of specified type
+template <class Type>
+static Type* findBlock(vtkMultiBlockDataSet* mb)
+{
+  const unsigned int nblocks = mb->GetNumberOfBlocks();
+  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  {
+    vtkDataObject* obj = mb->GetBlock(blocki);
+    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
+
+    Type* dataset;
+    if (subblock)
+    {
+      dataset = findBlock<Type>(subblock);
+    }
+    else
+    {
+      dataset = Type::SafeDownCast(obj);
+    }
+    if (dataset)
+    {
+      return dataset;
+    }
+  }
+  return nullptr;
+}
+
+// Get named block of specified type
+template <class Type>
+static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
+{
+  const unsigned int nblocks = mb->GetNumberOfBlocks();
+  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  {
+    vtkDataObject* obj = mb->GetBlock(blocki);
+    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
+
+    Type* dataset;
+    if (subblock)
+    {
+      dataset = findBlock<Type>(subblock, blockName);
+    }
+    else if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
+    {
+      dataset = Type::SafeDownCast(obj);
+    }
+    if (dataset)
+    {
+      return dataset;
+    }
+  }
+  return nullptr;
+}
+
+} // End anonymous namespace
+
+int TestOpenFOAMReaderFaceZone(int argc, char* argv[])
+{
+  // Read file name.
+  char* filename =
+    vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/OpenFOAM/squareBend/squareBend.foam");
+
+  // Read the file
+  vtkNew<vtkOpenFOAMReader> reader;
+  reader->SetFileName(filename);
+  delete[] filename;
+
+  reader->SetTimeValue(100);
+  // These method names will be revised in the future
+  reader->ReadZonesOn();
+  reader->CopyDataToCellZonesOn();
+
+  // Dont currently need anything selected (controlled above)
+  reader->DisableAllPatchArrays();
+  reader->Update();
+
+  auto* allBlocks = vtkMultiBlockDataSet::SafeDownCast(reader->GetOutput());
+  auto* zoneBlocks = findBlock<vtkMultiBlockDataSet>(allBlocks, "zones");
+
+  if (!zoneBlocks)
+  {
+    std::cout << "No zone blocks!\n";
+    return 1;
+  }
+
+  // Get the first polyData set (faces)
+  auto* fzone = findBlock<vtkPolyData>(zoneBlocks);
+  if (!fzone)
+  {
+    std::cout << "No faceZone!\n";
+    return 1;
+  }
+
+  fzone->GetCellData()->SetScalars(fzone->GetCellData()->GetArray("p"));
+
+  // Visualize
+  vtkNew<vtkPolyDataMapper> mapper;
+  mapper->SetInputData(fzone);
+  mapper->ScalarVisibilityOn();
+  mapper->SetColorModeToMapScalars();
+  mapper->SetScalarRange(-40, 80);
+
+  vtkNew<vtkActor> actor;
+  actor->SetMapper(mapper);
+
+  vtkNew<vtkRenderer> renderer;
+  vtkNew<vtkRenderWindow> renderWindow;
+  renderWindow->AddRenderer(renderer);
+  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
+  renderWindowInteractor->SetRenderWindow(renderWindow);
+
+  renderer->AddActor(actor);
+  renderer->SetBackground(0, 0, 0);
+
+  renderWindow->Render();
+
+  int retVal = vtkRegressionTestImage(renderWindow);
+  if (retVal == vtkRegressionTester::DO_INTERACTOR)
+  {
+    renderWindowInteractor->Start();
+  }
+
+  return EXIT_SUCCESS;
+}
diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
index 981b35dca17..223517d1d8e 100644
--- a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
@@ -28,20 +28,34 @@
 namespace
 {
 
-// Get named block
+// Get named block of specified type
 template <class Type>
 static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
 {
   const unsigned int nblocks = mb->GetNumberOfBlocks();
   for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
   {
-    if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
+    vtkDataObject* obj = mb->GetBlock(blocki);
+    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
+
+    Type* dataset;
+    if (subblock)
+    {
+      dataset = findBlock<Type>(subblock, blockName);
+    }
+    else if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
     {
-      return Type::SafeDownCast(mb->GetBlock(blocki));
+      dataset = Type::SafeDownCast(obj);
+    }
+    if (dataset)
+    {
+      return dataset;
     }
   }
+
   return nullptr;
 }
+
 } // End anonymous namespace
 
 int TestOpenFOAMReaderLagrangianSerial(int argc, char* argv[])
diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLargePolyhedral.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLargePolyhedral.cxx
new file mode 100644
index 00000000000..a5ca9d09d69
--- /dev/null
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLargePolyhedral.cxx
@@ -0,0 +1,102 @@
+/*=========================================================================
+
+  Program:   Visualization Toolkit
+  Module:    TestOpenFOAMReaderDimensionedFields.cxx
+
+  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+  All rights reserved.
+  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notice for more information.
+
+=========================================================================*/
+
+#include "vtkOpenFOAMReader.h"
+
+#include "vtkCellData.h"
+#include "vtkCompositeDataGeometryFilter.h"
+#include "vtkCompositePolyDataMapper.h"
+#include "vtkMultiBlockDataSet.h"
+#include "vtkNew.h"
+#include "vtkPointData.h"
+#include "vtkProperty.h"
+#include "vtkRenderWindow.h"
+#include "vtkRenderWindowInteractor.h"
+#include "vtkRenderer.h"
+#include "vtkUnstructuredGrid.h"
+
+#include "vtkRegressionTestImage.h"
+#include "vtkTestUtilities.h"
+
+namespace
+{
+
+// Get any block of specified type
+template <class Type>
+static Type* findBlock(vtkMultiBlockDataSet* mb)
+{
+  const unsigned int nblocks = mb->GetNumberOfBlocks();
+  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  {
+    vtkDataObject* obj = mb->GetBlock(blocki);
+    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
+
+    Type* dataset;
+    if (subblock)
+    {
+      dataset = findBlock<Type>(subblock);
+    }
+    else
+    {
+      dataset = Type::SafeDownCast(obj);
+    }
+    if (dataset)
+    {
+      return dataset;
+    }
+  }
+  return nullptr;
+}
+
+} // End anonymous namespace
+
+int TestOpenFOAMReaderLargePolyhedral(int argc, char* argv[])
+{
+  // Read file name.
+  char* filename = vtkTestUtilities::ExpandDataFileName(
+    argc, argv, "Data/OpenFOAM/largePolyhedral/largePolyhedral.foam");
+
+  // Read the file
+  vtkNew<vtkOpenFOAMReader> reader;
+  reader->SetFileName(filename);
+  delete[] filename;
+  reader->Update();
+
+  // Read everything
+  reader->EnableAllPatchArrays();
+  reader->Update();
+
+  reader->Print(std::cout);
+  reader->GetOutput()->Print(std::cout);
+
+  auto* allBlocks = vtkMultiBlockDataSet::SafeDownCast(reader->GetOutput());
+  if (!allBlocks)
+  {
+    std::cout << "No blocks!\n";
+    return 1;
+  }
+
+  vtkIdType nCells = 0;
+
+  auto* ug = findBlock<vtkUnstructuredGrid>(allBlocks);
+  if (ug)
+  {
+    nCells = ug->GetNumberOfCells();
+  }
+
+  int retVal = (nCells != 1);
+
+  return retVal;
+}
diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderValuePointPatch.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderValuePointPatch.cxx
new file mode 100644
index 00000000000..b216613c88d
--- /dev/null
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderValuePointPatch.cxx
@@ -0,0 +1,130 @@
+/*=========================================================================
+
+  Program:   Visualization Toolkit
+  Module:    TestSimplePointsReaderWriter.cxx
+
+  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+  All rights reserved.
+  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notice for more information.
+
+=========================================================================*/
+
+#include "vtkOpenFOAMReader.h"
+
+#include "vtkCellData.h"
+#include "vtkInformation.h"
+#include "vtkMultiBlockDataSet.h"
+#include "vtkNew.h"
+#include "vtkPointData.h"
+#include "vtkPolyData.h"
+#include "vtkPolyDataMapper.h"
+#include "vtkProperty.h"
+#include "vtkRenderWindow.h"
+#include "vtkRenderWindowInteractor.h"
+#include "vtkRenderer.h"
+#include "vtkUnstructuredGrid.h"
+
+#include "vtkRegressionTestImage.h"
+#include "vtkTestUtilities.h"
+
+namespace
+{
+
+// Get named block of specified type
+template <class Type>
+static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
+{
+  const unsigned int nblocks = mb->GetNumberOfBlocks();
+  std::cerr << "has " << nblocks << " blocks\n";
+  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  {
+    vtkDataObject* obj = mb->GetBlock(blocki);
+    std::cerr << "check block: " << mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME())
+              << std::endl;
+
+    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
+
+    Type* dataset;
+    if (subblock)
+    {
+      dataset = findBlock<Type>(subblock, blockName);
+    }
+    else if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
+    {
+      dataset = Type::SafeDownCast(obj);
+    }
+    if (dataset)
+    {
+      return dataset;
+    }
+  }
+  return nullptr;
+}
+
+} // End anonymous namespace
+
+int TestOpenFOAMReaderValuePointPatch(int argc, char* argv[])
+{
+  // Read file name.
+  char* filename = vtkTestUtilities::ExpandDataFileName(
+    argc, argv, "Data/OpenFOAM/valuePointPatch/valuePointPatch.foam");
+
+  // Read the file
+  vtkNew<vtkOpenFOAMReader> reader;
+  reader->SetFileName(filename);
+  delete[] filename;
+  reader->Update();
+
+  reader->SetTimeValue(2002);
+  reader->EnableAllPatchArrays();
+  reader->Update();
+
+  auto* allBlocks = vtkMultiBlockDataSet::SafeDownCast(reader->GetOutput());
+  if (!allBlocks)
+  {
+    std::cout << "No blocks!\n";
+    return 1;
+  }
+
+  auto* pointPatch = findBlock<vtkPolyData>(allBlocks, "visor");
+  if (!pointPatch)
+  {
+    std::cout << "No point patch!\n";
+    return 1;
+  }
+
+  pointPatch->GetPointData()->SetScalars(pointPatch->GetPointData()->GetArray("pointLocations"));
+
+  // Visualize
+  vtkNew<vtkPolyDataMapper> mapper;
+  mapper->SetInputData(pointPatch);
+  mapper->ScalarVisibilityOn();
+  mapper->SetColorModeToMapScalars();
+  mapper->SetScalarRange(1.1, 1.3);
+
+  vtkNew<vtkActor> actor;
+  actor->SetMapper(mapper);
+
+  vtkNew<vtkRenderer> renderer;
+  vtkNew<vtkRenderWindow> renderWindow;
+  renderWindow->AddRenderer(renderer);
+  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
+  renderWindowInteractor->SetRenderWindow(renderWindow);
+
+  renderer->AddActor(actor);
+  renderer->SetBackground(0, 0, 0);
+
+  renderWindow->Render();
+
+  int retVal = vtkRegressionTestImage(renderWindow);
+  if (retVal == vtkRegressionTester::DO_INTERACTOR)
+  {
+    renderWindowInteractor->Start();
+  }
+
+  return EXIT_SUCCESS;
+}
diff --git a/IO/Parallel/Testing/Cxx/CMakeLists.txt b/IO/Parallel/Testing/Cxx/CMakeLists.txt
index 4554ae8142b..9fabed257cd 100644
--- a/IO/Parallel/Testing/Cxx/CMakeLists.txt
+++ b/IO/Parallel/Testing/Cxx/CMakeLists.txt
@@ -2,12 +2,14 @@ if (TARGET VTK::ParallelMPI)
   vtk_add_test_mpi(vtkIOParallelCxxTests-MPI tests
     TESTING_DATA
     TestPOpenFOAMReader.cxx
+    TestPOpenFOAMReaderLagrangianUncollated.cxx,NO_VALID
     )
   vtk_test_cxx_executable(vtkIOParallelCxxTests-MPI tests)
 endif()
 
 vtk_add_test_cxx(vtkIOParallelCxxTests tests
   TestPOpenFOAMReader.cxx
+  TestPOpenFOAMReaderLagrangianUncollated.cxx,NO_VALID
   TestBigEndianPlot3D.cxx,NO_VALID
   )
 vtk_test_cxx_executable(vtkIOParallelCxxTests tests)
diff --git a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx
new file mode 100644
index 00000000000..b1e277a159c
--- /dev/null
+++ b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx
@@ -0,0 +1,157 @@
+/*=========================================================================
+
+  Program:   Visualization Toolkit
+  Module:    TestSimplePointsReaderWriter.cxx
+
+  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+  All rights reserved.
+  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notice for more information.
+
+=========================================================================*/
+
+#if VTK_MODULE_ENABLE_VTK_ParallelMPI
+#include "vtkMPIController.h"
+#else
+#include "vtkDummyController.h"
+#endif
+
+#include <vtkCellData.h>
+#include <vtkCompositeDataSet.h>
+#include <vtkDataSetMapper.h>
+#include <vtkInformation.h>
+#include <vtkLogger.h>
+#include <vtkMultiBlockDataSet.h>
+#include <vtkPOpenFOAMReader.h>
+#include <vtkPointData.h>
+#include <vtkPolyData.h>
+#include <vtkSmartPointer.h>
+#include <vtkTestUtilities.h>
+#include <vtkUnstructuredGrid.h>
+
+namespace
+{
+
+// Get named block
+template <class Type>
+static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
+{
+  const unsigned int nblocks = mb->GetNumberOfBlocks();
+  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  {
+    if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
+    {
+      return Type::SafeDownCast(mb->GetBlock(blocki));
+    }
+  }
+  return nullptr;
+}
+} // End anonymous namespace
+
+int TestPOpenFOAMReaderLagrangianUncollated(int argc, char* argv[])
+{
+#if VTK_MODULE_ENABLE_VTK_ParallelMPI
+  vtkNew<vtkMPIController> controller;
+#else
+  vtkNew<vtkDummyController> controller;
+#endif
+  controller->Initialize(&argc, &argv);
+  int rank = controller->GetLocalProcessId();
+  vtkLogger::SetThreadName("rank=" + std::to_string(rank));
+  vtkMultiProcessController::SetGlobalController(controller);
+
+  // Read file name.
+  char* filename = vtkTestUtilities::ExpandDataFileName(
+    argc, argv, "Data/OpenFOAM/simplifiedSiwek-uncollated/simplifiedSiwek-uncollated.foam");
+
+  // Read the file
+  vtkNew<vtkPOpenFOAMReader> reader;
+  reader->SetFileName(filename);
+  delete[] filename;
+  reader->Update();
+
+  reader->SetCaseType(vtkPOpenFOAMReader::DECOMPOSED_CASE);
+  reader->SetTimeValue(0.01);
+  // Re-read with everything selected
+  reader->EnableAllPatchArrays();
+  reader->Update();
+
+  reader->Print(std::cout);
+  reader->GetOutput()->Print(std::cout);
+  // reader->GetOutput()->GetBlock(0)->Print(std::cout);
+
+  std::cout << "CaseType: " << int(reader->GetCaseType()) << std::endl;
+
+  int hasLagrangian = 0;
+  long nClouds = 0;
+  long nParticles = 0;
+
+  do
+  {
+    auto* allBlocks = vtkMultiBlockDataSet::SafeDownCast(reader->GetOutput());
+    if (!allBlocks)
+    {
+      std::cout << "No blocks!\n";
+      break;
+    }
+    std::cout << "Read " << allBlocks->GetNumberOfBlocks() << " blocks" << std::endl;
+
+    auto* lagrangianBlocks = findBlock<vtkMultiBlockDataSet>(allBlocks, "lagrangian");
+    if (!lagrangianBlocks)
+    {
+      std::cout << "No lagrangian blocks!\n";
+      break;
+    }
+
+    // Bad name, but it is what we have
+    for (int i = 0; i < reader->GetNumberOfPatchArrays(); ++i)
+    {
+      std::string displayName(reader->GetPatchArrayName(i));
+      auto slash = displayName.rfind('/');
+
+      if (displayName.compare(0, slash, "lagrangian") == 0 && slash != std::string::npos)
+      {
+        hasLagrangian = 1;
+        ++slash;
+        std::string cloudName(displayName.substr(slash));
+        std::cout << "  Display " << displayName << " = Cloud <" << cloudName << ">" << std::endl;
+
+        auto* cloudData = findBlock<vtkPolyData>(lagrangianBlocks, cloudName.c_str());
+
+        if (cloudData)
+        {
+          ++nClouds;
+          nParticles += static_cast<long>(cloudData->GetNumberOfPoints());
+        }
+      }
+    }
+  } while (false);
+
+  int globalHasLagrangian = hasLagrangian;
+  long nGlobalClouds = nClouds;
+  long nGlobalParticles = nParticles;
+
+  // maxOp for clouds may be misleading, but good enough for test
+  controller->AllReduce(&hasLagrangian, &globalHasLagrangian, 1, vtkCommunicator::LOGICAL_OR_OP);
+  controller->AllReduce(&nClouds, &nGlobalClouds, 1, vtkCommunicator::MAX_OP);
+  controller->AllReduce(&nParticles, &nGlobalParticles, 1, vtkCommunicator::SUM_OP);
+
+  // No need for Barrier after AllReduce
+  controller->Finalize();
+
+  int retVal = 0;
+  if (rank == 0)
+  {
+    std::cout << "  Read " << nParticles << " particles from " << nClouds << " clouds" << std::endl;
+    retVal = (nParticles != 0);
+  }
+  controller->Barrier();
+  controller->Broadcast(&retVal, 1, 0);
+
+  controller->Finalize();
+
+  return !retVal;
+}
diff --git a/Testing/Data/OpenFOAM/largePolyhedral/2002/pointLocations.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/2002/pointLocations.sha512
new file mode 100644
index 00000000000..22a7b209400
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/2002/pointLocations.sha512
@@ -0,0 +1 @@
+74a7536954895e893dea993ce8997c2318cf7d776167769ed4e247bcaeba52733b812717a5d006df75fb56b30a4f92351cd378049706457e6b552af66e89e385
diff --git a/Testing/Data/OpenFOAM/largePolyhedral/2002/uniform/time.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/2002/uniform/time.sha512
new file mode 100644
index 00000000000..c3214bf523c
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/2002/uniform/time.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/boundary.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/boundary.sha512
new file mode 100644
index 00000000000..1be4756165b
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/boundary.sha512
@@ -0,0 +1 @@
+3e0d910d6a5ea28074ee0adb0f0ee7b40c5a78306ca812af440a445e7aaa0cd472b9ac6aeddf04d3a83ffbb872c30d1ca5dbfc4982687e164816c970b52ac6ab
diff --git a/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/faces.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/faces.sha512
new file mode 100644
index 00000000000..f299e61ddd6
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/faces.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/neighbour.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/neighbour.sha512
new file mode 100644
index 00000000000..c2f544a5862
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/neighbour.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/owner.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/owner.sha512
new file mode 100644
index 00000000000..43ac1e858d2
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/owner.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/points.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/points.sha512
new file mode 100644
index 00000000000..74f80217537
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/constant/polyMesh/points.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/largePolyhedral/largePolyhedral.foam.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/largePolyhedral.foam.sha512
new file mode 100644
index 00000000000..c2f1924ca31
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/largePolyhedral.foam.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/largePolyhedral/system/controlDict.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/system/controlDict.sha512
new file mode 100644
index 00000000000..26eae4e4d9b
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/system/controlDict.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/largePolyhedral/system/fvSchemes.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/system/fvSchemes.sha512
new file mode 100644
index 00000000000..0da596eecd1
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/system/fvSchemes.sha512
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diff --git a/Testing/Data/OpenFOAM/largePolyhedral/system/fvSolution.sha512 b/Testing/Data/OpenFOAM/largePolyhedral/system/fvSolution.sha512
new file mode 100644
index 00000000000..7483cadb81f
--- /dev/null
+++ b/Testing/Data/OpenFOAM/largePolyhedral/system/fvSolution.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/CH4.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/CH4.sha512
new file mode 100644
index 00000000000..2bbcb4619ff
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/CH4.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/CO2.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/CO2.sha512
new file mode 100644
index 00000000000..aae59769fba
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/CO2.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/H2.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/H2.sha512
new file mode 100644
index 00000000000..62a70699627
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/H2.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/H2O.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/H2O.sha512
new file mode 100644
index 00000000000..aa6b99acbb7
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/H2O.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/N2.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/N2.sha512
new file mode 100644
index 00000000000..96a766eedb6
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/N2.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/O2.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/O2.sha512
new file mode 100644
index 00000000000..1377bc11971
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/O2.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/T.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/T.sha512
new file mode 100644
index 00000000000..c24f90b87f1
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/T.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/U.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/U.sha512
new file mode 100644
index 00000000000..72536d6af8a
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/U.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Cp.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Cp.sha512
new file mode 100644
index 00000000000..c0bd2f25269
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Cp.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/T.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/T.sha512
new file mode 100644
index 00000000000..1e7eecdebe1
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/T.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/U.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/U.sha512
new file mode 100644
index 00000000000..0a9fab6461f
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/U.sha512
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/UCorrect.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/UCorrect.sha512
new file mode 100644
index 00000000000..afbef4aa869
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/UCorrect.sha512
@@ -0,0 +1 @@
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/UTurb.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/UTurb.sha512
new file mode 100644
index 00000000000..d1d3768bf1c
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+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/UTurb.sha512
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Ygas.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Ygas.sha512
new file mode 100644
index 00000000000..44a59d75e03
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Yliquid.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Yliquid.sha512
new file mode 100644
index 00000000000..8ccf799ccc6
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+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Yliquid.sha512
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new file mode 100644
index 00000000000..5967f6609cb
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+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/Ysolid.sha512
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new file mode 100644
index 00000000000..99949f658f7
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+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/active.sha512
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new file mode 100644
index 00000000000..84aa167ef1c
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+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/age.sha512
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/coordinates.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/coordinates.sha512
new file mode 100644
index 00000000000..f27f1bd0ecd
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new file mode 100644
index 00000000000..24e70485793
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/dTarget.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/dTarget.sha512
new file mode 100644
index 00000000000..dfc810216fb
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/mass0.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/mass0.sha512
new file mode 100644
index 00000000000..67b8eab800a
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/nParticle.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/nParticle.sha512
new file mode 100644
index 00000000000..66dfb399431
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diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/origId.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/0.005/lagrangian/coalCloud1/origId.sha512
new file mode 100644
index 00000000000..0bbb100bf55
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new file mode 100644
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+++ b/Testing/Data/OpenFOAM/valuePointPatch/constant/polyMesh/owner.sha512
@@ -0,0 +1 @@
+528a27558bb467a10c1b2c220b9e9181abb04e106211506da1ad1cb8e17acf6c5710b5facee1868d1051d1011225a6ce65102e9a49ab2d4b3a8d97e5394e39de
diff --git a/Testing/Data/OpenFOAM/valuePointPatch/constant/polyMesh/points.sha512 b/Testing/Data/OpenFOAM/valuePointPatch/constant/polyMesh/points.sha512
new file mode 100644
index 00000000000..74f80217537
--- /dev/null
+++ b/Testing/Data/OpenFOAM/valuePointPatch/constant/polyMesh/points.sha512
@@ -0,0 +1 @@
+938ac32f69b38fd4270ce2df382d58252770831662ae09e7de43df6eb81625e95c95a49144bdb67b885d9a0237c35783526e8212afd212d98e1563c0561e0b25
diff --git a/Testing/Data/OpenFOAM/valuePointPatch/system/controlDict.sha512 b/Testing/Data/OpenFOAM/valuePointPatch/system/controlDict.sha512
new file mode 100644
index 00000000000..26eae4e4d9b
--- /dev/null
+++ b/Testing/Data/OpenFOAM/valuePointPatch/system/controlDict.sha512
@@ -0,0 +1 @@
+fe7dfbd46a10e51e2147cf63ce2cce04ec162059dea89ea62e6e53e611c2aace289c56e2e534bcc5218807582548d6b3e653e67ca0cb868ca4e9ab3df09c2af6
diff --git a/Testing/Data/OpenFOAM/valuePointPatch/system/fvSchemes.sha512 b/Testing/Data/OpenFOAM/valuePointPatch/system/fvSchemes.sha512
new file mode 100644
index 00000000000..0da596eecd1
--- /dev/null
+++ b/Testing/Data/OpenFOAM/valuePointPatch/system/fvSchemes.sha512
@@ -0,0 +1 @@
+985e993feb4de991903f770c7b8f807cf5011745a3699e0499c488edb25577fc0cfedf3808c6ce937bc55ce6340740b868471eeee034e19ecc6e50ac5b03fe63
diff --git a/Testing/Data/OpenFOAM/valuePointPatch/system/fvSolution.sha512 b/Testing/Data/OpenFOAM/valuePointPatch/system/fvSolution.sha512
new file mode 100644
index 00000000000..7483cadb81f
--- /dev/null
+++ b/Testing/Data/OpenFOAM/valuePointPatch/system/fvSolution.sha512
@@ -0,0 +1 @@
+3448e1c22faef0e0a2370f7efe6d8191956ed4693532bf40372f2deaf2f03ea4b7aa71a105e8582975600fdb5a3116f0faa39dc0403c6148720bed19509719f2
diff --git a/Testing/Data/OpenFOAM/valuePointPatch/valuePointPatch.foam.sha512 b/Testing/Data/OpenFOAM/valuePointPatch/valuePointPatch.foam.sha512
new file mode 100644
index 00000000000..c2f1924ca31
--- /dev/null
+++ b/Testing/Data/OpenFOAM/valuePointPatch/valuePointPatch.foam.sha512
@@ -0,0 +1 @@
+cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e
-- 
GitLab


From c49f7de602bf2204c734c92b203a787a9125d059 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Thu, 15 Apr 2021 13:52:37 +0200
Subject: [PATCH 29/36] openfoam: update failing tests

- local routines for data set search was wrong, which meant either
  failure to find blocks or segfault.

- add baseline images
---
 IO/Geometry/Testing/CMakeLists.txt            | 33 +++++++------
 .../Cxx/TestOpenFOAMReaderFaceZone.cxx        | 43 ++++++-----------
 .../TestOpenFOAMReaderLagrangianSerial.cxx    | 44 ++++++++---------
 .../Cxx/TestOpenFOAMReaderLargePolyhedral.cxx | 24 ++++------
 .../Cxx/TestOpenFOAMReaderValuePointPatch.cxx | 24 +++-------
 .../TestOpenFOAMReaderFaceZone.png.sha512     |  1 +
 ...stOpenFOAMReaderValuePointPatch.png.sha512 |  1 +
 .../Testing/Cxx/TestPOpenFOAMReader.cxx       | 46 ++++++++++--------
 ...estPOpenFOAMReaderLagrangianUncollated.cxx | 48 ++++++++++++-------
 .../simplifiedSiwek-serial.foam               |  0
 .../simplifiedSiwek-serial.foam.sha512        |  1 +
 .../constant/README.txt.sha512                |  1 +
 .../simplifiedSiwek-uncollated.foam           |  0
 .../simplifiedSiwek-uncollated.foam.sha512    |  1 +
 14 files changed, 127 insertions(+), 140 deletions(-)
 create mode 100644 IO/Geometry/Testing/Data/Baseline/TestOpenFOAMReaderFaceZone.png.sha512
 create mode 100644 IO/Geometry/Testing/Data/Baseline/TestOpenFOAMReaderValuePointPatch.png.sha512
 delete mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam.sha512
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/constant/README.txt.sha512
 delete mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/simplifiedSiwek-uncollated.foam
 create mode 100644 Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/simplifiedSiwek-uncollated.foam.sha512

diff --git a/IO/Geometry/Testing/CMakeLists.txt b/IO/Geometry/Testing/CMakeLists.txt
index 721a03333a4..44ef3115c26 100644
--- a/IO/Geometry/Testing/CMakeLists.txt
+++ b/IO/Geometry/Testing/CMakeLists.txt
@@ -5,14 +5,14 @@ vtk_module_test_data(
   Data/IncOctPntLocResult.dat
 
   Data/OpenFOAM/DimFields/cavity/,REGEX:.*
-  Data/OpenFOAM/DimFields/cavity/system/,REGEX:.*
+  Data/OpenFOAM/DimFields/cavity/system/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/DimFields/cavity/constant/,RECURSE:,REGEX:.*$
-  Data/OpenFOAM/DimFields/cavity/0/,REGEX:.*
+  Data/OpenFOAM/DimFields/cavity/0/,RECURSE:,REGEX:.*$
 
   Data/OpenFOAM/cavity/,REGEX:.*
-  Data/OpenFOAM/cavity/system/,REGEX:.*
+  Data/OpenFOAM/cavity/system/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/cavity/constant/,RECURSE:,REGEX:.*$
-  Data/OpenFOAM/cavity/0/,REGEX:.*
+  Data/OpenFOAM/cavity/0/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/cavity/0.5/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/cavity/1/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/cavity/1.5/,RECURSE:,REGEX:.*$
@@ -20,40 +20,43 @@ vtk_module_test_data(
   Data/OpenFOAM/cavity/2.5/,RECURSE:,REGEX:.*$
 
   Data/OpenFOAM/precision/case01/,REGEX:.*
-  Data/OpenFOAM/precision/case01/system/,REGEX:.*
+  Data/OpenFOAM/precision/case01/system/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/precision/case01/constant/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/precision/case01/0/,RECURSE:,REGEX:.*$
 
   Data/OpenFOAM/largePolyhedral/,REGEX:.*
-  Data/OpenFOAM/largePolyhedral/system/,REGEX:.*
+  Data/OpenFOAM/largePolyhedral/system/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/largePolyhedral/constant/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/largePolyhedral/2002/,RECURSE:,REGEX:.*$
 
   Data/OpenFOAM/regex/,REGEX:.*
-  Data/OpenFOAM/regex/system/,REGEX:.*
+  Data/OpenFOAM/regex/system/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/regex/constant/,RECURSE:,REGEX:.*$
-  Data/OpenFOAM/regex/0/,REGEX:.*
+  Data/OpenFOAM/regex/0/,RECURSE:,REGEX:.*$
 
-  Data/OpenFOAM/simplifiedSiwek-serial/system/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/system/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/simplifiedSiwek-serial/constant/,RECURSE:,REGEX:.*$
-  Data/OpenFOAM/simplifiedSiwek-serial/0/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-serial/0/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/simplifiedSiwek-serial/0.005/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/simplifiedSiwek-serial/0.01/,RECURSE:,REGEX:.*$
 
-  Data/OpenFOAM/simplifiedSiwek-uncollated/system/,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-uncollated/,REGEX:.*
+  Data/OpenFOAM/simplifiedSiwek-uncollated/system/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/simplifiedSiwek-uncollated/constant/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/simplifiedSiwek-uncollated/processor0/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/simplifiedSiwek-uncollated/processor1/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/simplifiedSiwek-uncollated/processor2/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/simplifiedSiwek-uncollated/processor3/,RECURSE:,REGEX:.*$
 
   Data/OpenFOAM/squareBend/,REGEX:.*
-  Data/OpenFOAM/squareBend/system/,REGEX:.*
+  Data/OpenFOAM/squareBend/system/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/squareBend/constant/,RECURSE:,REGEX:.*$
-  Data/OpenFOAM/squareBend/50/,REGEX:.*
-  Data/OpenFOAM/squareBend/100/,REGEX:.*
+  Data/OpenFOAM/squareBend/50/,RECURSE:,REGEX:.*$
+  Data/OpenFOAM/squareBend/100/,RECURSE:,REGEX:.*$
 
   Data/OpenFOAM/valuePointPatch/,REGEX:.*
-  Data/OpenFOAM/valuePointPatch/system/,REGEX:.*
+  Data/OpenFOAM/valuePointPatch/system/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/valuePointPatch/constant/,RECURSE:,REGEX:.*$
   Data/OpenFOAM/valuePointPatch/2002/,RECURSE:,REGEX:.*$
 
diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderFaceZone.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderFaceZone.cxx
index 3504304c8ef..f485439fca4 100644
--- a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderFaceZone.cxx
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderFaceZone.cxx
@@ -38,54 +38,39 @@ namespace
 template <class Type>
 static Type* findBlock(vtkMultiBlockDataSet* mb)
 {
-  const unsigned int nblocks = mb->GetNumberOfBlocks();
-  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  Type* dataset = nullptr;
+  const unsigned int nblocks = (mb ? mb->GetNumberOfBlocks() : 0u);
+  for (unsigned int blocki = 0; !dataset && blocki < nblocks; ++blocki)
   {
     vtkDataObject* obj = mb->GetBlock(blocki);
-    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
-
-    Type* dataset;
-    if (subblock)
+    dataset = Type::SafeDownCast(obj);
+    if (!dataset)
     {
-      dataset = findBlock<Type>(subblock);
-    }
-    else
-    {
-      dataset = Type::SafeDownCast(obj);
-    }
-    if (dataset)
-    {
-      return dataset;
+      dataset = findBlock<Type>(vtkMultiBlockDataSet::SafeDownCast(obj));
     }
   }
-  return nullptr;
+  return dataset;
 }
 
 // Get named block of specified type
 template <class Type>
 static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
 {
-  const unsigned int nblocks = mb->GetNumberOfBlocks();
-  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  Type* dataset = nullptr;
+  const unsigned int nblocks = (mb ? mb->GetNumberOfBlocks() : 0u);
+  for (unsigned int blocki = 0; !dataset && blocki < nblocks; ++blocki)
   {
     vtkDataObject* obj = mb->GetBlock(blocki);
-    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
-
-    Type* dataset;
-    if (subblock)
-    {
-      dataset = findBlock<Type>(subblock, blockName);
-    }
-    else if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
+    if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
     {
       dataset = Type::SafeDownCast(obj);
     }
-    if (dataset)
+    if (!dataset)
     {
-      return dataset;
+      dataset = findBlock<Type>(vtkMultiBlockDataSet::SafeDownCast(obj), blockName);
     }
   }
-  return nullptr;
+  return dataset;
 }
 
 } // End anonymous namespace
diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
index 223517d1d8e..b6e503ed4c4 100644
--- a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
@@ -13,17 +13,18 @@
 
 =========================================================================*/
 
-#include <vtkCellData.h>
-#include <vtkCompositeDataSet.h>
-#include <vtkDataSetMapper.h>
-#include <vtkInformation.h>
-#include <vtkMultiBlockDataSet.h>
-#include <vtkOpenFOAMReader.h>
-#include <vtkPointData.h>
-#include <vtkPolyData.h>
-#include <vtkSmartPointer.h>
-#include <vtkTestUtilities.h>
-#include <vtkUnstructuredGrid.h>
+#include "vtkOpenFOAMReader.h"
+
+#include "vtkCellData.h"
+#include "vtkCompositeDataSet.h"
+#include "vtkDataSetMapper.h"
+#include "vtkInformation.h"
+#include "vtkMultiBlockDataSet.h"
+#include "vtkPointData.h"
+#include "vtkPolyData.h"
+#include "vtkSmartPointer.h"
+#include "vtkTestUtilities.h"
+#include "vtkUnstructuredGrid.h"
 
 namespace
 {
@@ -32,28 +33,21 @@ namespace
 template <class Type>
 static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
 {
-  const unsigned int nblocks = mb->GetNumberOfBlocks();
-  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  Type* dataset = nullptr;
+  const unsigned int nblocks = (mb ? mb->GetNumberOfBlocks() : 0u);
+  for (unsigned int blocki = 0; !dataset && blocki < nblocks; ++blocki)
   {
     vtkDataObject* obj = mb->GetBlock(blocki);
-    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
-
-    Type* dataset;
-    if (subblock)
-    {
-      dataset = findBlock<Type>(subblock, blockName);
-    }
-    else if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
+    if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
     {
       dataset = Type::SafeDownCast(obj);
     }
-    if (dataset)
+    if (!dataset)
     {
-      return dataset;
+      dataset = findBlock<Type>(vtkMultiBlockDataSet::SafeDownCast(obj), blockName);
     }
   }
-
-  return nullptr;
+  return dataset;
 }
 
 } // End anonymous namespace
diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLargePolyhedral.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLargePolyhedral.cxx
index a5ca9d09d69..9e024d21404 100644
--- a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLargePolyhedral.cxx
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLargePolyhedral.cxx
@@ -18,6 +18,7 @@
 #include "vtkCellData.h"
 #include "vtkCompositeDataGeometryFilter.h"
 #include "vtkCompositePolyDataMapper.h"
+#include "vtkInformation.h"
 #include "vtkMultiBlockDataSet.h"
 #include "vtkNew.h"
 #include "vtkPointData.h"
@@ -37,27 +38,18 @@ namespace
 template <class Type>
 static Type* findBlock(vtkMultiBlockDataSet* mb)
 {
-  const unsigned int nblocks = mb->GetNumberOfBlocks();
-  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  Type* dataset = nullptr;
+  const unsigned int nblocks = (mb ? mb->GetNumberOfBlocks() : 0u);
+  for (unsigned int blocki = 0; !dataset && blocki < nblocks; ++blocki)
   {
     vtkDataObject* obj = mb->GetBlock(blocki);
-    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
-
-    Type* dataset;
-    if (subblock)
-    {
-      dataset = findBlock<Type>(subblock);
-    }
-    else
-    {
-      dataset = Type::SafeDownCast(obj);
-    }
-    if (dataset)
+    dataset = Type::SafeDownCast(obj);
+    if (!dataset)
     {
-      return dataset;
+      dataset = findBlock<Type>(vtkMultiBlockDataSet::SafeDownCast(obj));
     }
   }
-  return nullptr;
+  return dataset;
 }
 
 } // End anonymous namespace
diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderValuePointPatch.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderValuePointPatch.cxx
index b216613c88d..10e5f69874b 100644
--- a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderValuePointPatch.cxx
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderValuePointPatch.cxx
@@ -38,31 +38,21 @@ namespace
 template <class Type>
 static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
 {
-  const unsigned int nblocks = mb->GetNumberOfBlocks();
-  std::cerr << "has " << nblocks << " blocks\n";
-  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  Type* dataset = nullptr;
+  const unsigned int nblocks = (mb ? mb->GetNumberOfBlocks() : 0u);
+  for (unsigned int blocki = 0; !dataset && blocki < nblocks; ++blocki)
   {
     vtkDataObject* obj = mb->GetBlock(blocki);
-    std::cerr << "check block: " << mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME())
-              << std::endl;
-
-    auto* subblock = vtkMultiBlockDataSet::SafeDownCast(obj);
-
-    Type* dataset;
-    if (subblock)
-    {
-      dataset = findBlock<Type>(subblock, blockName);
-    }
-    else if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
+    if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
     {
       dataset = Type::SafeDownCast(obj);
     }
-    if (dataset)
+    if (!dataset)
     {
-      return dataset;
+      dataset = findBlock<Type>(vtkMultiBlockDataSet::SafeDownCast(obj), blockName);
     }
   }
-  return nullptr;
+  return dataset;
 }
 
 } // End anonymous namespace
diff --git a/IO/Geometry/Testing/Data/Baseline/TestOpenFOAMReaderFaceZone.png.sha512 b/IO/Geometry/Testing/Data/Baseline/TestOpenFOAMReaderFaceZone.png.sha512
new file mode 100644
index 00000000000..d7c7dd2f025
--- /dev/null
+++ b/IO/Geometry/Testing/Data/Baseline/TestOpenFOAMReaderFaceZone.png.sha512
@@ -0,0 +1 @@
+a10a8e82b3927d061fbf18d1e7a450c8ad71ccab94948743d5b74dc595f3f20fa94b7850f90a02ab74f2d43f7d21aa575166cf725edd9588892cd8336314aaf2
diff --git a/IO/Geometry/Testing/Data/Baseline/TestOpenFOAMReaderValuePointPatch.png.sha512 b/IO/Geometry/Testing/Data/Baseline/TestOpenFOAMReaderValuePointPatch.png.sha512
new file mode 100644
index 00000000000..1cba5a53c79
--- /dev/null
+++ b/IO/Geometry/Testing/Data/Baseline/TestOpenFOAMReaderValuePointPatch.png.sha512
@@ -0,0 +1 @@
+7410596da2a225c1d27e10c9f193be4f4a146d0d47020f3d4695463e4b155d354c8cb2a74bdf9df6fbfd6730a79e138229dd175d6f575810bc6c62db1651f040
diff --git a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReader.cxx b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReader.cxx
index 7efd681a04d..8a2f1014a8e 100644
--- a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReader.cxx
+++ b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReader.cxx
@@ -19,24 +19,25 @@
 #include "vtkDummyController.h"
 #endif
 
-#include <vtkCellData.h>
-#include <vtkCompositeDataGeometryFilter.h>
-#include <vtkCompositeRenderManager.h>
-#include <vtkLogger.h>
-#include <vtkMultiBlockDataSet.h>
-#include <vtkMultiProcessController.h>
-#include <vtkNew.h>
-#include <vtkPOpenFOAMReader.h>
-#include <vtkPointData.h>
-#include <vtkPolyDataMapper.h>
-#include <vtkProperty.h>
-#include <vtkRenderWindow.h>
-#include <vtkRenderWindowInteractor.h>
-#include <vtkRenderer.h>
-#include <vtkUnstructuredGrid.h>
-
-#include <vtkRegressionTestImage.h>
-#include <vtkTestUtilities.h>
+#include "vtkPOpenFOAMReader.h"
+
+#include "vtkCellData.h"
+#include "vtkCompositeDataGeometryFilter.h"
+#include "vtkCompositeRenderManager.h"
+#include "vtkLogger.h"
+#include "vtkMultiBlockDataSet.h"
+#include "vtkMultiProcessController.h"
+#include "vtkNew.h"
+#include "vtkPointData.h"
+#include "vtkPolyDataMapper.h"
+#include "vtkProperty.h"
+#include "vtkRenderWindow.h"
+#include "vtkRenderWindowInteractor.h"
+#include "vtkRenderer.h"
+#include "vtkUnstructuredGrid.h"
+
+#include "vtkRegressionTestImage.h"
+#include "vtkTestUtilities.h"
 
 int TestPOpenFOAMReader(int argc, char* argv[])
 {
@@ -51,14 +52,17 @@ int TestPOpenFOAMReader(int argc, char* argv[])
   vtkMultiProcessController::SetGlobalController(controller);
 
   // Read file name.
-  const std::string filename =
+  char* filename =
     vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/OpenFOAM/cavity/cavity.foam");
-  std::cerr << filename.c_str() << std::endl;
+  std::cerr << filename << std::endl;
 
   // Read the file
   vtkNew<vtkPOpenFOAMReader> reader;
-  reader->SetFileName(filename.c_str());
+  reader->SetFileName(filename);
+  delete[] filename;
+  reader->SetCaseType(vtkPOpenFOAMReader::RECONSTRUCTED_CASE);
   reader->Update();
+
   reader->SetTimeValue(.5);
   //  reader->CreateCellToPointOn();
   reader->ReadZonesOn();
diff --git a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx
index b1e277a159c..9bd53a6ce94 100644
--- a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx
+++ b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx
@@ -19,18 +19,19 @@
 #include "vtkDummyController.h"
 #endif
 
-#include <vtkCellData.h>
-#include <vtkCompositeDataSet.h>
-#include <vtkDataSetMapper.h>
-#include <vtkInformation.h>
-#include <vtkLogger.h>
-#include <vtkMultiBlockDataSet.h>
-#include <vtkPOpenFOAMReader.h>
-#include <vtkPointData.h>
-#include <vtkPolyData.h>
-#include <vtkSmartPointer.h>
-#include <vtkTestUtilities.h>
-#include <vtkUnstructuredGrid.h>
+#include "vtkPOpenFOAMReader.h"
+
+#include "vtkCellData.h"
+#include "vtkCompositeDataSet.h"
+#include "vtkDataSetMapper.h"
+#include "vtkInformation.h"
+#include "vtkLogger.h"
+#include "vtkMultiBlockDataSet.h"
+#include "vtkPointData.h"
+#include "vtkPolyData.h"
+#include "vtkSmartPointer.h"
+#include "vtkTestUtilities.h"
+#include "vtkUnstructuredGrid.h"
 
 namespace
 {
@@ -39,15 +40,21 @@ namespace
 template <class Type>
 static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
 {
-  const unsigned int nblocks = mb->GetNumberOfBlocks();
-  for (unsigned int blocki = 0; blocki < nblocks; ++blocki)
+  Type* dataset = nullptr;
+  const unsigned int nblocks = (mb ? mb->GetNumberOfBlocks() : 0u);
+  for (unsigned int blocki = 0; !dataset && blocki < nblocks; ++blocki)
   {
+    vtkDataObject* obj = mb->GetBlock(blocki);
     if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
     {
-      return Type::SafeDownCast(mb->GetBlock(blocki));
+      dataset = Type::SafeDownCast(obj);
+    }
+    if (!dataset)
+    {
+      dataset = findBlock<Type>(vtkMultiBlockDataSet::SafeDownCast(obj), blockName);
     }
   }
-  return nullptr;
+  return dataset;
 }
 } // End anonymous namespace
 
@@ -71,12 +78,13 @@ int TestPOpenFOAMReaderLagrangianUncollated(int argc, char* argv[])
   vtkNew<vtkPOpenFOAMReader> reader;
   reader->SetFileName(filename);
   delete[] filename;
+  reader->SetCaseType(vtkPOpenFOAMReader::DECOMPOSED_CASE);
   reader->Update();
 
-  reader->SetCaseType(vtkPOpenFOAMReader::DECOMPOSED_CASE);
   reader->SetTimeValue(0.01);
   // Re-read with everything selected
   reader->EnableAllPatchArrays();
+  reader->SetCaseType(vtkPOpenFOAMReader::DECOMPOSED_CASE);
   reader->Update();
 
   reader->Print(std::cout);
@@ -153,5 +161,11 @@ int TestPOpenFOAMReaderLagrangianUncollated(int argc, char* argv[])
 
   controller->Finalize();
 
+  if (!retVal)
+  {
+    std::cout << "WARNING: test needs revising" << std::endl;
+    return 0;
+  }
+
   return !retVal;
 }
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam.sha512
new file mode 100644
index 00000000000..c2f1924ca31
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam.sha512
@@ -0,0 +1 @@
+cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/constant/README.txt.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/constant/README.txt.sha512
new file mode 100644
index 00000000000..1de07d3507c
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/constant/README.txt.sha512
@@ -0,0 +1 @@
+7fe6bbd068ceac7d0d5a19e6ec0423cfe3cd5c8be733de16840c8ade0dd5b24192b11f0d6475b8a54212ad4c6d1f9643f1192d92fe214f81e5530fdb9ebd5e15
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/simplifiedSiwek-uncollated.foam b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/simplifiedSiwek-uncollated.foam
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/simplifiedSiwek-uncollated.foam.sha512 b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/simplifiedSiwek-uncollated.foam.sha512
new file mode 100644
index 00000000000..c2f1924ca31
--- /dev/null
+++ b/Testing/Data/OpenFOAM/simplifiedSiwek-uncollated/simplifiedSiwek-uncollated.foam.sha512
@@ -0,0 +1 @@
+cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e
-- 
GitLab


From f43d49d4cc3d15137ad3b116ba2e42f34a360a07 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Thu, 22 Apr 2021 12:07:14 +0200
Subject: [PATCH 30/36] openfoam: update lagrangian tests

---
 .../TestOpenFOAMReaderLagrangianSerial.cxx    |  19 +-
 IO/Parallel/Testing/Cxx/CMakeLists.txt        |   2 +
 .../Testing/Cxx/TestPOpenFOAMReader.cxx       |   2 +-
 .../TestPOpenFOAMReaderLagrangianSerial.cxx   | 164 ++++++++++++++++++
 ...estPOpenFOAMReaderLagrangianUncollated.cxx |  27 +--
 5 files changed, 178 insertions(+), 36 deletions(-)
 create mode 100644 IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianSerial.cxx

diff --git a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
index b6e503ed4c4..1602c43ad53 100644
--- a/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
+++ b/IO/Geometry/Testing/Cxx/TestOpenFOAMReaderLagrangianSerial.cxx
@@ -1,7 +1,7 @@
 /*=========================================================================
 
   Program:   Visualization Toolkit
-  Module:    TestSimplePointsReaderWriter.cxx
+  Module:    TestOpenFOAMReaderLagrangianSerial
 
   Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
   All rights reserved.
@@ -63,18 +63,13 @@ int TestOpenFOAMReaderLagrangianSerial(int argc, char* argv[])
   reader->SetFileName(filename);
   delete[] filename;
   reader->Update();
-
-  reader->SetTimeValue(0.01);
-  // reader->CreateCellToPointOn();
-  // reader->ReadZonesOn();
+  reader->SetTimeValue(0.005);
 
   // Re-read with everything selected
   reader->EnableAllPatchArrays();
   reader->Update();
-
   reader->Print(std::cout);
-  reader->GetOutput()->Print(std::cout);
-  // reader->GetOutput()->GetBlock(0)->Print(std::cout);
+  // reader->GetOutput()->Print(std::cout);
 
   auto* allBlocks = vtkMultiBlockDataSet::SafeDownCast(reader->GetOutput());
   auto* lagrangianBlocks = findBlock<vtkMultiBlockDataSet>(allBlocks, "lagrangian");
@@ -85,8 +80,8 @@ int TestOpenFOAMReaderLagrangianSerial(int argc, char* argv[])
     return 1;
   }
 
-  vtkIdType nClouds = 0;
-  vtkIdType nParticles = 0;
+  long nClouds = 0;
+  long nParticles = 0;
 
   const int nLagrangianFields = reader->GetNumberOfLagrangianArrays();
   std::cout << "----- Have " << nLagrangianFields << " Lagrangian fields" << std::endl;
@@ -97,14 +92,12 @@ int TestOpenFOAMReaderLagrangianSerial(int argc, char* argv[])
     std::string displayName(reader->GetPatchArrayName(i));
     auto slash = displayName.rfind('/');
 
-    if (displayName.compare(0, slash, "lagrangian") == 0 && slash != std::string::npos)
+    if (slash != std::string::npos && displayName.compare(0, ++slash, "lagrangian/") == 0)
     {
-      ++slash;
       std::string cloudName(displayName.substr(slash));
       std::cout << "  Display " << displayName << " = Cloud <" << cloudName << ">" << std::endl;
 
       auto* cloudData = findBlock<vtkPolyData>(lagrangianBlocks, cloudName.c_str());
-
       if (cloudData)
       {
         ++nClouds;
diff --git a/IO/Parallel/Testing/Cxx/CMakeLists.txt b/IO/Parallel/Testing/Cxx/CMakeLists.txt
index 9fabed257cd..ee54239a1ea 100644
--- a/IO/Parallel/Testing/Cxx/CMakeLists.txt
+++ b/IO/Parallel/Testing/Cxx/CMakeLists.txt
@@ -2,6 +2,7 @@ if (TARGET VTK::ParallelMPI)
   vtk_add_test_mpi(vtkIOParallelCxxTests-MPI tests
     TESTING_DATA
     TestPOpenFOAMReader.cxx
+    TestPOpenFOAMReaderLagrangianSerial.cxx,NO_VALID
     TestPOpenFOAMReaderLagrangianUncollated.cxx,NO_VALID
     )
   vtk_test_cxx_executable(vtkIOParallelCxxTests-MPI tests)
@@ -9,6 +10,7 @@ endif()
 
 vtk_add_test_cxx(vtkIOParallelCxxTests tests
   TestPOpenFOAMReader.cxx
+  TestPOpenFOAMReaderLagrangianSerial.cxx,NO_VALID
   TestPOpenFOAMReaderLagrangianUncollated.cxx,NO_VALID
   TestBigEndianPlot3D.cxx,NO_VALID
   )
diff --git a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReader.cxx b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReader.cxx
index 8a2f1014a8e..1d8cb090cbc 100644
--- a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReader.cxx
+++ b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReader.cxx
@@ -1,7 +1,7 @@
 /*=========================================================================
 
   Program:   Visualization Toolkit
-  Module:    TestSimplePointsReaderWriter.cxx
+  Module:    TestPOpenFOAMReader
 
   Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
   All rights reserved.
diff --git a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianSerial.cxx b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianSerial.cxx
new file mode 100644
index 00000000000..22ecd6f3742
--- /dev/null
+++ b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianSerial.cxx
@@ -0,0 +1,164 @@
+/*=========================================================================
+
+  Program:   Visualization Toolkit
+  Module:    TestPOpenFOAMReaderLagrangianSerial
+
+  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+  All rights reserved.
+  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
+
+     This software is distributed WITHOUT ANY WARRANTY; without even
+     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+     PURPOSE.  See the above copyright notice for more information.
+
+=========================================================================*/
+
+#if VTK_MODULE_ENABLE_VTK_ParallelMPI
+#include "vtkMPIController.h"
+#else
+#include "vtkDummyController.h"
+#endif
+
+#include "vtkPOpenFOAMReader.h"
+
+#include "vtkCellData.h"
+#include "vtkCompositeDataSet.h"
+#include "vtkDataSetMapper.h"
+#include "vtkInformation.h"
+#include "vtkLogger.h"
+#include "vtkMultiBlockDataSet.h"
+#include "vtkPointData.h"
+#include "vtkPolyData.h"
+#include "vtkSmartPointer.h"
+#include "vtkTestUtilities.h"
+#include "vtkUnstructuredGrid.h"
+
+namespace
+{
+
+// Get named block of specified type
+template <class Type>
+static Type* findBlock(vtkMultiBlockDataSet* mb, const char* blockName)
+{
+  Type* dataset = nullptr;
+  const unsigned int nblocks = (mb ? mb->GetNumberOfBlocks() : 0u);
+  for (unsigned int blocki = 0; !dataset && blocki < nblocks; ++blocki)
+  {
+    vtkDataObject* obj = mb->GetBlock(blocki);
+    if (strcmp(mb->GetMetaData(blocki)->Get(vtkCompositeDataSet::NAME()), blockName) == 0)
+    {
+      dataset = Type::SafeDownCast(obj);
+    }
+    if (!dataset)
+    {
+      dataset = findBlock<Type>(vtkMultiBlockDataSet::SafeDownCast(obj), blockName);
+    }
+  }
+  return dataset;
+}
+
+} // End anonymous namespace
+
+int TestPOpenFOAMReaderLagrangianSerial(int argc, char* argv[])
+{
+#if VTK_MODULE_ENABLE_VTK_ParallelMPI
+  vtkNew<vtkMPIController> controller;
+#else
+  vtkNew<vtkDummyController> controller;
+#endif
+  controller->Initialize(&argc, &argv);
+  int rank = controller->GetLocalProcessId();
+  vtkLogger::SetThreadName("rank=" + std::to_string(rank));
+  vtkMultiProcessController::SetGlobalController(controller);
+
+  // Read file name.
+  char* filename = vtkTestUtilities::ExpandDataFileName(
+    argc, argv, "Data/OpenFOAM/simplifiedSiwek-serial/simplifiedSiwek-serial.foam");
+
+  // Read the file
+  vtkNew<vtkPOpenFOAMReader> reader;
+  reader->SetFileName(filename);
+  delete[] filename;
+  reader->SetCaseType(vtkPOpenFOAMReader::RECONSTRUCTED_CASE);
+  reader->Update();
+
+  reader->SetTimeValue(0.005);
+
+  // Re-read with everything selected
+  reader->EnableAllPatchArrays();
+  reader->Update();
+  reader->Print(std::cout);
+  // reader->GetOutput()->Print(std::cout);
+
+  auto* allBlocks = vtkMultiBlockDataSet::SafeDownCast(reader->GetOutput());
+  auto* lagrangianBlocks = findBlock<vtkMultiBlockDataSet>(allBlocks, "lagrangian");
+
+  if (!lagrangianBlocks)
+  {
+    std::cout << "No lagrangian blocks!\n";
+    return 1;
+  }
+
+  long nClouds = 0;
+  long nParticles = 0;
+  int hasLagrangian = 0;
+
+  do
+  {
+    auto* allBlocks = vtkMultiBlockDataSet::SafeDownCast(reader->GetOutput());
+    if (!allBlocks)
+    {
+      std::cout << "No blocks!\n";
+      break;
+    }
+    std::cout << "Read " << allBlocks->GetNumberOfBlocks() << " blocks" << std::endl;
+
+    auto* lagrangianBlocks = findBlock<vtkMultiBlockDataSet>(allBlocks, "lagrangian");
+    if (!lagrangianBlocks)
+    {
+      std::cout << "No lagrangian blocks!\n";
+      break;
+    }
+
+    // Bad name, but it is what we have
+    for (int i = 0; i < reader->GetNumberOfPatchArrays(); ++i)
+    {
+      std::string displayName(reader->GetPatchArrayName(i));
+      auto slash = displayName.rfind('/');
+
+      if (slash != std::string::npos && displayName.compare(0, ++slash, "lagrangian/") == 0)
+      {
+        hasLagrangian = 1;
+        std::string cloudName(displayName.substr(slash));
+        std::cout << "  Display " << displayName << " = Cloud <" << cloudName << ">" << std::endl;
+
+        auto* cloudData = findBlock<vtkPolyData>(lagrangianBlocks, cloudName.c_str());
+        if (cloudData)
+        {
+          ++nClouds;
+          nParticles += static_cast<long>(cloudData->GetNumberOfPoints());
+        }
+      }
+    }
+  } while (false);
+
+  int globalHasLagrangian = hasLagrangian;
+  long nGlobalClouds = nClouds;
+  long nGlobalParticles = nParticles;
+
+  // maxOp for clouds may be misleading, but good enough for test
+  controller->AllReduce(&hasLagrangian, &globalHasLagrangian, 1, vtkCommunicator::LOGICAL_OR_OP);
+  controller->AllReduce(&nClouds, &nGlobalClouds, 1, vtkCommunicator::MAX_OP);
+  controller->AllReduce(&nParticles, &nGlobalParticles, 1, vtkCommunicator::SUM_OP);
+
+  int retVal = 0;
+  if (rank == 0)
+  {
+    std::cout << "  Read " << nParticles << " particles from " << nClouds << " clouds" << std::endl;
+    retVal = (nParticles != 0);
+  }
+  controller->Barrier();
+  controller->Broadcast(&retVal, 1, 0);
+
+  return !retVal;
+}
diff --git a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx
index 9bd53a6ce94..e57b9828851 100644
--- a/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx
+++ b/IO/Parallel/Testing/Cxx/TestPOpenFOAMReaderLagrangianUncollated.cxx
@@ -1,7 +1,7 @@
 /*=========================================================================
 
   Program:   Visualization Toolkit
-  Module:    TestSimplePointsReaderWriter.cxx
+  Module:    TestPOpenFOAMReaderLagrangianUncollated
 
   Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
   All rights reserved.
@@ -81,21 +81,17 @@ int TestPOpenFOAMReaderLagrangianUncollated(int argc, char* argv[])
   reader->SetCaseType(vtkPOpenFOAMReader::DECOMPOSED_CASE);
   reader->Update();
 
-  reader->SetTimeValue(0.01);
+  reader->SetTimeValue(0.005);
+
   // Re-read with everything selected
   reader->EnableAllPatchArrays();
-  reader->SetCaseType(vtkPOpenFOAMReader::DECOMPOSED_CASE);
   reader->Update();
-
   reader->Print(std::cout);
   reader->GetOutput()->Print(std::cout);
-  // reader->GetOutput()->GetBlock(0)->Print(std::cout);
 
-  std::cout << "CaseType: " << int(reader->GetCaseType()) << std::endl;
-
-  int hasLagrangian = 0;
   long nClouds = 0;
   long nParticles = 0;
+  int hasLagrangian = 0;
 
   do
   {
@@ -120,15 +116,13 @@ int TestPOpenFOAMReaderLagrangianUncollated(int argc, char* argv[])
       std::string displayName(reader->GetPatchArrayName(i));
       auto slash = displayName.rfind('/');
 
-      if (displayName.compare(0, slash, "lagrangian") == 0 && slash != std::string::npos)
+      if (slash != std::string::npos && displayName.compare(0, ++slash, "lagrangian/") == 0)
       {
         hasLagrangian = 1;
-        ++slash;
         std::string cloudName(displayName.substr(slash));
         std::cout << "  Display " << displayName << " = Cloud <" << cloudName << ">" << std::endl;
 
         auto* cloudData = findBlock<vtkPolyData>(lagrangianBlocks, cloudName.c_str());
-
         if (cloudData)
         {
           ++nClouds;
@@ -147,9 +141,6 @@ int TestPOpenFOAMReaderLagrangianUncollated(int argc, char* argv[])
   controller->AllReduce(&nClouds, &nGlobalClouds, 1, vtkCommunicator::MAX_OP);
   controller->AllReduce(&nParticles, &nGlobalParticles, 1, vtkCommunicator::SUM_OP);
 
-  // No need for Barrier after AllReduce
-  controller->Finalize();
-
   int retVal = 0;
   if (rank == 0)
   {
@@ -159,13 +150,5 @@ int TestPOpenFOAMReaderLagrangianUncollated(int argc, char* argv[])
   controller->Barrier();
   controller->Broadcast(&retVal, 1, 0);
 
-  controller->Finalize();
-
-  if (!retVal)
-  {
-    std::cout << "WARNING: test needs revising" << std::endl;
-    return 0;
-  }
-
   return !retVal;
 }
-- 
GitLab


From 01b61ad4e286fd33725dcd174d7299ba70910c3e Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Wed, 21 Apr 2021 17:00:58 +0200
Subject: [PATCH 31/36] openfoam: preserve uncollated lagrangian information
 (fixes #18179)

- old version assumed lagrangian data are available on all processor
  sub-directories and used a central naming mechanism accordingly.

  This meant that missing clouds on higher processors would
  effectively block out clouds. Likely didn't work properly with
  clouds in multiple regions.
---
 IO/Geometry/vtkOpenFOAMReader.cxx | 145 ++++++++++++++++++++----------
 1 file changed, 100 insertions(+), 45 deletions(-)

diff --git a/IO/Geometry/vtkOpenFOAMReader.cxx b/IO/Geometry/vtkOpenFOAMReader.cxx
index a78e1be0e1b..978c6b17255 100644
--- a/IO/Geometry/vtkOpenFOAMReader.cxx
+++ b/IO/Geometry/vtkOpenFOAMReader.cxx
@@ -316,6 +316,19 @@ void AppendLabelValue(vtkDataArray* array, vtkTypeInt64 val, bool use64BitLabels
   }
 }
 
+// Append unique string to list
+static void appendUniq(vtkStringArray* list, vtkStringArray* items)
+{
+  for (int i = 0; i < items->GetNumberOfTuples(); ++i)
+  {
+    vtkStdString& str = items->GetValue(i);
+    if (list->LookupValue(str) == -1)
+    {
+      list->InsertNextValue(str);
+    }
+  }
+}
+
 // Tuple remapping for symmTensor ordering
 // OpenFOAM [XX XY XZ YY YZ ZZ]
 // VTK uses [XX YY ZZ XY YZ XZ]
@@ -1002,6 +1015,8 @@ public:
 
   const std::string& GetRegionName() const noexcept { return this->RegionName; }
 
+  vtkStringArray* GetLagrangianPaths() { return this->LagrangianPaths; }
+
   // Read mesh/fields and create dataset
   int RequestData(vtkMultiBlockDataSet* output);
   int MakeMetaDataAtTimeStep(vtkStringArray*, vtkStringArray*, vtkStringArray*, bool);
@@ -1046,6 +1061,9 @@ private:
   vtkStringArray* PointFieldFiles;
   vtkStringArray* LagrangianFieldFiles;
 
+  // The cloud paths (region-local)
+  vtkNew<vtkStringArray> LagrangianPaths;
+
   // Mesh dimensions and construction information
   vtkIdType NumPoints;
   vtkIdType NumInternalFaces;
@@ -5805,15 +5823,16 @@ void vtkOpenFOAMReaderPrivate::LocateLagrangianClouds(const std::string& timePat
       if (io.OpenOrGzip(cloudPath + "/positions") && io.GetObjectName() == "positions" &&
         io.GetClassName().find("Cloud") != std::string::npos)
       {
-        if (this->Parent->LagrangianPaths->LookupValue(displayName) == -1)
+        // Append unique
+        if (this->LagrangianPaths->LookupValue(displayName) == -1)
         {
-          this->Parent->LagrangianPaths->InsertNextValue(displayName);
+          this->LagrangianPaths->InsertNextValue(displayName);
         }
         this->GetFieldNames(cloudPath, true);
         this->Parent->PatchDataArraySelection->AddArray(displayName.c_str());
       }
     }
-    this->Parent->LagrangianPaths->Squeeze();
+    this->LagrangianPaths->Squeeze();
   }
 }
 
@@ -6161,7 +6180,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
   this->LagrangianFieldFiles->Initialize();
   if (listNextTimeStep)
   {
-    this->Parent->LagrangianPaths->Initialize();
+    this->LagrangianPaths->Initialize();
   }
   this->LocateLagrangianClouds(timePath);
 
@@ -6174,7 +6193,7 @@ int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelecti
     const std::string timePath2(this->TimePath(1));
     this->GetFieldNames(timePath2 + this->RegionPath());
     // if lagrangian clouds were not found at timestep 0
-    if (this->Parent->LagrangianPaths->GetNumberOfTuples() == 0)
+    if (!this->LagrangianPaths->GetNumberOfTuples())
     {
       this->LocateLagrangianClouds(timePath2);
     }
@@ -9594,18 +9613,26 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
 
   auto* lagrangianMesh = vtkMultiBlockDataSet::New();
 
-  const vtkIdType nClouds = this->Parent->LagrangianPaths->GetNumberOfTuples();
+  const std::string regionCloudPrefix(this->RegionPrefix() + "lagrangian/");
+
+  vtkDataArraySelection* selection = this->Parent->PatchDataArraySelection;
 
-  for (vtkIdType cloudi = 0; cloudi < nClouds; ++cloudi)
+  const vtkIdType nItems = selection->GetNumberOfArrays();
+  for (vtkIdType itemi = 0; itemi < nItems; ++itemi)
   {
-    const std::string& displayName = this->Parent->LagrangianPaths->GetValue(cloudi);
+    if (!selection->GetArraySetting(itemi))
+    {
+      continue;
+    }
+    const std::string displayName(selection->GetArrayName(itemi));
 
-    if (!this->Parent->PatchDataArraySelection->ArrayExists(displayName.c_str()) ||
-      !this->Parent->GetPatchArrayStatus(displayName.c_str()) ||
-      !this->IsDisplayRegion(displayName))
+    auto slash = displayName.rfind('/');
+    if (slash == std::string::npos || displayName.compare(0, ++slash, regionCloudPrefix) != 0)
     {
       continue;
     }
+    // The cloud name is the final component of the displayName
+    const std::string cloudName(displayName.substr(slash));
 
     // Equivalent to CurrentTimeRegionPath() + "lagrangian/{cloudName}"
     std::string cloudPath(this->CurrentTimePath());
@@ -9615,64 +9642,74 @@ vtkMultiBlockDataSet* vtkOpenFOAMReaderPrivate::MakeLagrangianMesh()
     }
     cloudPath += displayName;
 
-    // create an empty mesh to keep node/leaf structure of the
-    // multi-block consistent even if mesh doesn't exist
+    // Keep node/leaf structure consistent even if mesh doesn't exist
     vtkNew<vtkPolyData> cloudMesh;
-
-    // The cloud name is the final component of the displayName
-    ::AppendBlock(lagrangianMesh, cloudMesh, displayName.substr(displayName.rfind('/') + 1));
+    ::AppendBlock(lagrangianMesh, cloudMesh, cloudName);
 
     // Get the parcel positions as vtkPoints
     vtkNew<vtkPoints> points;
     {
+      bool missingCloud = true;
       const std::string positionsPath(cloudPath + "/positions");
 
       vtkFoamIOobject io(this->CasePath, this->Parent);
-      if (!io.OpenOrGzip(positionsPath))
+      if (io.OpenOrGzip(positionsPath))
       {
-        continue;
-      }
+        vtkFoamEntryValue dict(nullptr);
 
-      vtkFoamEntryValue dict(nullptr);
-      try
-      {
-        if (io.IsFloat64())
+        try
         {
-          dict.ReadNonUniformList<vtkFoamToken::VECTORLIST, //
-            vtkFoamRead::vectorListTraits<vtkFloatArray, double, 3, true>>(io);
+          if (io.IsFloat64())
+          {
+            dict.ReadNonUniformList<vtkFoamToken::VECTORLIST, //
+              vtkFoamRead::vectorListTraits<vtkFloatArray, double, 3, true>>(io);
+          }
+          else
+          {
+            dict.ReadNonUniformList<vtkFoamToken::VECTORLIST, //
+              vtkFoamRead::vectorListTraits<vtkFloatArray, float, 3, true>>(io);
+          }
+
+          // Transfer float tuples to points
+          auto* pointArray = dict.ReleasePtr<vtkFloatArray>();
+
+          points->SetData(pointArray);
+          pointArray->Delete();
+          missingCloud = false;
         }
-        else
+        catch (const vtkFoamError& err)
         {
-          dict.ReadNonUniformList<vtkFoamToken::VECTORLIST, //
-            vtkFoamRead::vectorListTraits<vtkFloatArray, float, 3, true>>(io);
+          vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
+                        << ": " << err);
         }
+      }
 
-        // Transfer float tuples to points
-        auto* pointArray = dict.ReleasePtr<vtkFloatArray>();
+      if (missingCloud)
+      {
+        vtkNew<vtkFloatArray> pointArray;
+        pointArray->SetNumberOfComponents(3);
         points->SetData(pointArray);
-        pointArray->Delete();
       }
-      catch (const vtkFoamError& err)
+      const vtkIdType nParticles = points->GetNumberOfPoints();
+
+      cloudMesh->SetPoints(points);
+
+      // Cells (verts) for lagrangian mesh
+      vtkNew<vtkCellArray> verts;
+      verts->AllocateExact(nParticles, nParticles);
+      for (vtkIdType i = 0; i < nParticles; ++i)
       {
-        vtkErrorMacro(<< "Error reading line " << io.GetLineNumber() << " of " << io.GetFileName()
-                      << ": " << err);
-        continue;
+        verts->InsertNextCell(1, &i);
       }
+      cloudMesh->SetVerts(verts);
     }
 
-    const vtkIdType nParticles = points->GetNumberOfPoints();
-
-    // Create lagrangian mesh
-    cloudMesh->AllocateEstimate(nParticles, 1);
-    for (vtkIdType i = 0; i < nParticles; i++)
-    {
-      cloudMesh->InsertNextCell(VTK_VERTEX, 1, &i);
-    }
-    cloudMesh->SetPoints(points);
+    const vtkIdType nParticles = cloudMesh->GetPoints()->GetNumberOfPoints();
 
+    // Can be empty or missing for a particular region or processor
     if (!nParticles)
     {
-      continue; // Could be empty or missing for a particular region or processor
+      continue;
     }
 
     // Read lagrangian fields
@@ -11291,6 +11328,16 @@ int vtkOpenFOAMReader::MakeMetaDataAtTimeStep(const bool listNextTimeStep)
   vtkNew<vtkStringArray> cellDataNames;
   vtkNew<vtkStringArray> pointDataNames;
   vtkNew<vtkStringArray> lagrangianDataNames;
+  vtkNew<vtkStringArray> lagrangianPaths;
+
+  if (listNextTimeStep)
+  {
+    this->LagrangianPaths->Initialize();
+  }
+  else
+  {
+    lagrangianPaths->DeepCopy(this->LagrangianPaths);
+  }
 
   int ret = 1;
   vtkOpenFOAMReaderPrivate* reader;
@@ -11300,11 +11347,19 @@ int vtkOpenFOAMReader::MakeMetaDataAtTimeStep(const bool listNextTimeStep)
   {
     ret *= reader->MakeMetaDataAtTimeStep(
       cellDataNames, pointDataNames, lagrangianDataNames, listNextTimeStep);
+
+    appendUniq(lagrangianPaths, reader->GetLagrangianPaths());
   }
   this->AddSelectionNames(this->Parent->CellDataArraySelection, cellDataNames);
   this->AddSelectionNames(this->Parent->PointDataArraySelection, pointDataNames);
   this->AddSelectionNames(this->Parent->LagrangianDataArraySelection, lagrangianDataNames);
 
+  lagrangianPaths->Squeeze();
+  vtkSortDataArray::Sort(lagrangianPaths);
+
+  // Combine for all regions
+  this->LagrangianPaths->DeepCopy(lagrangianPaths);
+
   return ret;
 }
 
-- 
GitLab


From 19f0343950b28256bfc7d8a6941cc8336f296975 Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Mon, 8 Feb 2021 13:59:06 +0100
Subject: [PATCH 32/36] openfoam: preparatory work for collated format

- cleanup processor directory detection
---
 IO/Parallel/vtkPOpenFOAMReader.cxx | 412 ++++++++++++++++++++++++-----
 1 file changed, 346 insertions(+), 66 deletions(-)

diff --git a/IO/Parallel/vtkPOpenFOAMReader.cxx b/IO/Parallel/vtkPOpenFOAMReader.cxx
index 5cb139cc6a3..5b19002102b 100644
--- a/IO/Parallel/vtkPOpenFOAMReader.cxx
+++ b/IO/Parallel/vtkPOpenFOAMReader.cxx
@@ -14,6 +14,49 @@
 =========================================================================*/
 // This class was developed by Takuya Oshima at Niigata University,
 // Japan (oshima@eng.niigata-u.ac.jp).
+//
+// ---------------------------------------------------------------------------
+//
+// Bugs or support questions should be addressed to the discourse forum
+// https://discourse.paraview.org/ and/or KitWare
+//
+// ---------------------------------------------------------------------------
+// OpenFOAM decomposed cases have different formats (JAN 2021)
+//
+// - "Uncollated" with separate directories for each rank
+//   processor0 ... processorN
+//
+// - "Collated" with a single directory for all NN ranks
+//   processorsNN
+//
+// - "Collated" with directories for (inclusive) ranges of ranks
+//   processorsNN_first-last, ...
+//
+// The collated format is not yet supported by the underlying readers
+//------------------------------------------------------------------------------
+
+// Support for reading collated format
+#define VTK_FOAMFILE_COLLATED_FORMAT 0
+
+//------------------------------------------------------------------------------
+// Developer option to debug the reader states
+#define VTK_FOAMFILE_DEBUG 0
+
+// Similar to vtkErrorMacro etc.
+#if VTK_FOAMFILE_DEBUG
+#define vtkFoamDebug(x)                                                                            \
+  do                                                                                               \
+  {                                                                                                \
+    std::cerr << "" x;                                                                             \
+  } while (false)
+#else
+#define vtkFoamDebug(x)                                                                            \
+  do                                                                                               \
+  {                                                                                                \
+  } while (false)
+#endif // VTK_FOAMFILE_DEBUG
+
+//------------------------------------------------------------------------------
 
 #include "vtkPOpenFOAMReader.h"
 
@@ -35,9 +78,271 @@
 #include "vtkStreamingDemandDrivenPipeline.h"
 #include "vtkStringArray.h"
 
+#include <cctype>
+#include <cstring>
+
+//------------------------------------------------------------------------------
+
 vtkStandardNewMacro(vtkPOpenFOAMReader);
 vtkCxxSetObjectMacro(vtkPOpenFOAMReader, Controller, vtkMultiProcessController);
 
+//------------------------------------------------------------------------------
+
+// Local Functions
+
+namespace
+{
+
+// Create a sub-reader with the current characteristics
+vtkSmartPointer<vtkOpenFOAMReader> NewFoamReader(vtkOpenFOAMReader* parent)
+{
+  auto reader = vtkSmartPointer<vtkOpenFOAMReader>::New();
+  reader->SetFileName(parent->GetFileName());
+  reader->SetParent(parent);
+  reader->SetSkipZeroTime(parent->GetSkipZeroTime());
+  reader->SetUse64BitLabels(parent->GetUse64BitLabels());
+  reader->SetUse64BitFloats(parent->GetUse64BitFloats());
+
+  return reader;
+}
+
+// Generate a processor dirname from number or tuple.
+// For 1 component:
+//   procNum -> 'processor<procNum>'
+//
+// For 3 component tuple (nprocs, first, size)
+//
+// - processors<nprocs>, when first == size == 0
+// - processors<nprocs>_<first>-<last>, where last is inclusive
+static std::string ProcessorDirName(const vtkIntArray* dirs, int index)
+{
+  if (index < 0 || index >= dirs->GetNumberOfTuples())
+  {
+    return std::string();
+  }
+  else if (3 == dirs->GetNumberOfComponents())
+  {
+    // Collated name
+    const auto nprocs = dirs->GetTypedComponent(index, 0);
+    const auto first = dirs->GetTypedComponent(index, 1);
+    const auto size = dirs->GetTypedComponent(index, 2);
+
+    std::string stem("processors" + std::to_string(nprocs));
+    if (size)
+    {
+      const auto last = (first + size - 1); // inclusive range
+      return (stem + "_" + std::to_string(first) + "-" + std::to_string(last));
+    }
+    return stem;
+  }
+
+  // Uncollated name
+  return std::string("processor" + std::to_string(dirs->GetValue(index)));
+}
+
+#if VTK_FOAMFILE_COLLATED_FORMAT
+// Number of processor pieces represented by the tuple
+static inline int ProcessorsNumPieces(const int procTuple[])
+{
+  const auto nprocs = procTuple[0];
+  // const auto first = procTuple[1];
+  const auto size = procTuple[2];
+
+  return (size ? size : nprocs);
+}
+#endif
+
+// Search and list processor subdirectories
+// Detect collated and uncollated processor directories
+// - "processor(\d+)"
+// - "processors(\d+)"
+// - "processors(\d+)_(\d+)-(\d+)"
+//
+// string parsing logic as per fileOperation / parseProcsNumRange from OpenFOAM-v2012
+//
+// Return either collated or uncollated directories, never a mix.
+// Use the number of components to distinguish
+vtkSmartPointer<vtkIntArray> ScanForProcessorDirs(vtkDirectory* dir)
+{
+  // Uncollated: save processor id
+  auto uncollated = vtkSmartPointer<vtkIntArray>::New();
+  uncollated->SetNumberOfComponents(1);
+
+  // Collated: save (processor count, first, size) tuple
+  auto collated = vtkSmartPointer<vtkIntArray>::New();
+  collated->SetNumberOfComponents(3);
+
+  // Sort keys for collated
+  vtkNew<vtkIntArray> collatedNums;
+  int procTuple[3] = { 0, 0, 0 };
+
+  const vtkIdType nFiles = dir->GetNumberOfFiles();
+  for (vtkIdType filei = 0; filei < nFiles; ++filei)
+  {
+    const char* subdir = dir->GetFile(filei);
+
+    if (strncmp(subdir, "processor", 9) != 0 || !dir->FileIsDirectory(subdir))
+    {
+      continue;
+    }
+
+    if (isdigit(subdir[9]))
+    {
+      // processor<digits>
+      const char* nptr = (subdir + 9);
+      char* endptr = nullptr;
+
+      errno = 0;
+      long parsed = std::strtol(nptr, &endptr, 10);
+      if (errno || nptr == endptr)
+      {
+        continue; // bad parse
+      }
+      const auto procId = static_cast<int>(parsed);
+
+      // Require end of string
+      if (*endptr == '\0')
+      {
+        uncollated->InsertNextValue(procId);
+      }
+    }
+    else if (subdir[9] == 's' && isdigit(subdir[10]))
+    {
+      // processors<digits> or processors<digits>_<digits>-<digits>
+      const char* nptr = (subdir + 10);
+      char* endptr = nullptr;
+
+      // 1. numProcs
+      errno = 0;
+      long parsed = std::strtol(nptr, &endptr, 10);
+      if (errno || nptr == endptr)
+      {
+        continue; // bad parse
+      }
+      const auto nProcs = static_cast<int>(parsed);
+
+      // End of string? Then no range and we are done.
+      if (*endptr == '\0')
+      {
+        procTuple[0] = nProcs;
+        procTuple[1] = 0;
+        procTuple[2] = 0;
+
+        collated->InsertNextTypedTuple(procTuple);
+        collatedNums->InsertNextValue(nProcs);
+        continue;
+      }
+
+      // Parse point at start of range ('_' character)?
+      if (*endptr != '_')
+      {
+        continue;
+      }
+      nptr = ++endptr;
+
+      // 2. firstProc
+      errno = 0;
+      parsed = std::strtol(nptr, &endptr, 10);
+      if (errno || nptr == endptr)
+      {
+        continue; // bad parse
+      }
+      const auto firstProc = static_cast<int>(parsed);
+
+      // Parse point at range separator ('-' character)?
+      if (*endptr != '-')
+      {
+        continue;
+      }
+      nptr = ++endptr;
+
+      // 3. lastProc
+      errno = 0;
+      parsed = std::strtol(nptr, &endptr, 10);
+      if (errno || nptr == endptr)
+      {
+        continue; // bad parse
+      }
+      const auto lastProc = static_cast<int>(parsed);
+
+      if (
+        // Parse point at end of string
+        (*endptr == '\0')
+        // Input plausibility - accept nProcs == 0 in case that becomes useful in the future
+        && (nProcs >= 0 && firstProc >= 0 && firstProc <= lastProc))
+      {
+        // Convert first/last to start/size
+        procTuple[0] = nProcs;
+        procTuple[1] = firstProc;
+        procTuple[2] = (lastProc - firstProc + 1);
+
+        collated->InsertNextTypedTuple(procTuple);
+        collatedNums->InsertNextValue(nProcs);
+      }
+    }
+  }
+
+  collatedNums->Squeeze();
+  collated->Squeeze();
+  uncollated->Squeeze();
+
+  vtkSortDataArray::Sort(uncollated);
+  vtkSortDataArray::Sort(collatedNums, collated);
+
+#if VTK_FOAMFILE_DEBUG
+  std::cerr << "processor (";
+  for (vtkIdType proci = 0; proci < uncollated->GetNumberOfTuples(); ++proci)
+  {
+    std::cerr << ' ' << uncollated->GetValue(proci);
+  }
+  std::cerr << " )\n";
+
+  std::cerr << "processors (";
+  for (vtkIdType proci = 0; proci < collated->GetNumberOfTuples(); ++proci)
+  {
+    collated->GetTypedTuple(proci, procTuple);
+    std::cerr << ' ' << procTuple[0];
+    if (procTuple[2])
+    {
+      std::cerr << '_' << procTuple[1] << '-' << (procTuple[1] + procTuple[2] - 1);
+    }
+  }
+  std::cerr << " )\n";
+#endif // VTK_FOAMFILE_DEBUG
+
+#if VTK_FOAMFILE_COLLATED_FORMAT
+  const int nCollated = static_cast<int>(collated->GetNumberOfTuples());
+  if (nCollated)
+  {
+    // Sanity checks.
+    // Same number of processors, check that total number of pieces add up, etc.
+    if (collatedNums->GetValue(0) != collatedNums->GetValue(nCollated - 1))
+    {
+      // Failed
+      return uncollated;
+    }
+    else if (nCollated > 1)
+    {
+      // Identical nProcs. Now re-sort based on first-last range
+      for (int i = 0; i < nCollated; ++i)
+      {
+        const int firstProc = collated->GetTypedComponent(i, 1);
+        collatedNums->SetTValue(i, firstProc);
+      }
+
+      vtkSortDataArray::Sort(collatedNums, collated);
+    }
+
+    // Done
+    return collated;
+  }
+#endif
+
+  return uncollated;
+}
+
+} // End anonymous namespace
+
 //------------------------------------------------------------------------------
 vtkPOpenFOAMReader::vtkPOpenFOAMReader()
 {
@@ -134,6 +439,8 @@ int vtkPOpenFOAMReader::RequestInformation(
     return 0;
   }
 
+  // Handle the decomposed