/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkEnSightGoldReader.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 "vtkEnSightGoldReader.h"

#include "vtkCellData.h"
#include "vtkCharArray.h"
#include "vtkFloatArray.h"
#include "vtkIdList.h"
#include "vtkImageData.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPolyData.h"
#include "vtkRectilinearGrid.h"
#include "vtkStructuredGrid.h"
#include "vtkUnstructuredGrid.h"

#include <ctype.h>
#include <vtkstd/string>
#include <vtkstd/vector>

vtkCxxRevisionMacro(vtkEnSightGoldReader, "1.53");
vtkStandardNewMacro(vtkEnSightGoldReader);

//BTX
class UndefPartialInternal
{
public:
  double UndefCoordinates;
  double UndefBlock;
  double UndefElementTypes;
  vtkstd::vector<vtkIdType> PartialCoordinates;
  vtkstd::vector<vtkIdType> PartialBlock;
  vtkstd::vector<vtkIdType> PartialElementTypes;
};
//ETX

//----------------------------------------------------------------------------
vtkEnSightGoldReader::vtkEnSightGoldReader()
{
  this->UndefPartial = new UndefPartialInternal;
}
//----------------------------------------------------------------------------

vtkEnSightGoldReader::~vtkEnSightGoldReader()
{
  delete UndefPartial;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::ReadGeometryFile(const char* fileName, int timeStep)
{
  char line[256], subLine[256];
  int partId, realId, i;
  int lineRead;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("A GeometryFileName must be specified in the case file.");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to geometry file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }
  
  this->ReadNextDataLine(line);
  sscanf(line, " %*s %s", subLine);
  if (strncmp(subLine, "Binary",6) == 0)
    {
    vtkErrorMacro("This is a binary data set. Try "
                  <<"vtkEnSightGoldBinaryReader.");
    return 0;
    }
  
  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line);
      }
    
    while(strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadNextDataLine(line);
      }
    this->ReadLine(line);
    }

  // Skip description lines.  Using ReadLine instead of
  // ReadNextDataLine because the description line could be blank.
  this->ReadNextDataLine(line);
  // Skip the node id and element id lines.
  this->ReadNextDataLine(line);
  this->ReadNextDataLine(line);
  
  lineRead = this->ReadNextDataLine(line); // "extents" or "part"
  if (strncmp(line, "extents",7) == 0)
    {
    // Skipping the extent lines for now.
    this->ReadNextDataLine(line);
    this->ReadNextDataLine(line);
    this->ReadNextDataLine(line);
    lineRead = this->ReadNextDataLine(line); // "part"
    }
  
  while (lineRead && strncmp(line, "part", 4) == 0)
    {
    this->NumberOfGeometryParts++;
    this->ReadNextDataLine(line);
    partId = atoi(line) - 1; // EnSight starts #ing at 1.
    realId = this->InsertNewPartId(partId);

    this->ReadNextDataLine(line); // part description line
    char *name = strdup(line);
    if (strncmp(line, "interface", 9) == 0)
      {
      return 1; // ignore it and move on
      }

    this->ReadNextDataLine(line);
    
    if (strncmp(line, "block", 5) == 0)
      {
      if (sscanf(line, " %*s %s", subLine) == 1)
        {
        if (strncmp(subLine, "rectilinear",11) == 0)
          {
          // block rectilinear
          lineRead = this->CreateRectilinearGridOutput(realId, line, name);
          }
        else if (strncmp(subLine, "uniform",7) == 0)
          {
          // block uniform
          lineRead = this->CreateImageDataOutput(realId, line, name);
          }
        else
          {
          // block iblanked
          lineRead = this->CreateStructuredGridOutput(realId, line, name);
          }
        }
      else
        {
        // block
        lineRead = this->CreateStructuredGridOutput(realId, line, name);
        }
      }
    else
      {
      lineRead = this->CreateUnstructuredGridOutput(realId, line, name);
      if (lineRead < 0)
        {
        free(name);
        delete this->IS;
        this->IS = NULL;
        return 0;
        }
      }
    free(name);
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::ReadMeasuredGeometryFile(const char* fileName,
                                                   int timeStep)
{
  char line[256], subLine[256];
  vtkPoints *newPoints;
  int i;
  int tempId;
  vtkIdType id;
  float coords[3];
  vtkPolyData *geom;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("A MeasuredFileName must be specified in the case file.");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to measured geometry file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  // Skip the description line.  Using ReadLine instead of ReadNextDataLine
  // because the description line could be blank.
  this->ReadLine(line);

  if (sscanf(line, " %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "Binary",6) == 0)
      {
      vtkErrorMacro("This is a binary data set. Try "
                    << "vtkEnSight6BinaryReader.");
      return 0;
      }
    }

    if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      this->ReadLine(line);
      }
    
    while(strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadNextDataLine(line);
      }
    this->ReadLine(line);
    }

  this->ReadLine(line); // "particle coordinates"
  this->ReadLine(line);
  this->NumberOfMeasuredPoints = atoi(line);
  
  if (this->GetOutput(this->NumberOfGeometryParts) == NULL)
    {
    vtkDebugMacro("creating new measured geometry output");
    vtkPolyData* pd = vtkPolyData::New();
    pd->Allocate(this->NumberOfMeasuredPoints);
    this->SetNthOutput(this->NumberOfGeometryParts, pd);
    pd->Delete();
    }
  else if ( ! this->GetOutput(this->NumberOfGeometryParts)->IsA("vtkPolyData"))
    {
    vtkErrorMacro("Cannot change type of output");
    this->OutputsAreValid = 0;
    return 0;
    }

  geom = ((vtkPolyData*)this->GetOutput(this->NumberOfGeometryParts));

  newPoints = vtkPoints::New();
  newPoints->Allocate(this->NumberOfMeasuredPoints);
  
  for (i = 0; i < this->NumberOfMeasuredPoints; i++)
    {
    this->ReadLine(line);
    sscanf(line, " %8d %12e %12e %12e", &tempId, &coords[0], &coords[1],
           &coords[2]);
    id = tempId;
    newPoints->InsertNextPoint(coords);
    geom->InsertNextCell(VTK_VERTEX, 1, &id);
    }
  
  ((vtkPolyData*)this->GetOutput(this->NumberOfGeometryParts))->
    SetPoints(newPoints);
  
  newPoints->Delete();
  
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::ReadScalarsPerNode(const char* fileName, const char* description,
                                             int timeStep, int measured,
                                             int numberOfComponents,
                                             int component)
{
  char line[256], formatLine[256], tempLine[256];
  int partId, realId, numPts, i, j, numLines, moreScalars;
  vtkFloatArray *scalars;
  float scalarsRead[6];
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL ScalarPerNode variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to scalar per node file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }
  
  this->ReadNextDataLine(line); // skip the description line
  
  if (measured)
    {
    output = this->GetOutput(this->NumberOfGeometryParts);
    numPts = output->GetNumberOfPoints();
    if (numPts)
      {
      numLines = numPts / 6;
      moreScalars = numPts % 6;
    
      scalars = vtkFloatArray::New();
      scalars->SetNumberOfTuples(numPts);
      scalars->SetNumberOfComponents(numberOfComponents);
      scalars->Allocate(numPts * numberOfComponents);
    
      this->ReadNextDataLine(line);
    
      for (i = 0; i < numLines; i++)
        {
        sscanf(line, " %12e %12e %12e %12e %12e %12e", &scalarsRead[0],
               &scalarsRead[1], &scalarsRead[2], &scalarsRead[3],
               &scalarsRead[4], &scalarsRead[5]);
        for (j = 0; j < 6; j++)
          {
          scalars->InsertComponent(i*6 + j, component, scalarsRead[j]);        
          }
        this->ReadNextDataLine(line);
        }
      strcpy(formatLine, "");
      strcpy(tempLine, "");
      for (j = 0; j < moreScalars; j++)
        {
        strcat(formatLine, " %12e");
        sscanf(line, formatLine, &scalarsRead[j]);
        scalars->InsertComponent(i*6 + j, component, scalarsRead[j]);
        strcat(tempLine, " %*12e");
        strcpy(formatLine, tempLine);
        }
      scalars->SetName(description);
      output->GetPointData()->AddArray(scalars);
      if (!output->GetPointData()->GetScalars())
        {
        output->GetPointData()-> SetScalars(scalars);
        }
      scalars->Delete();
      }
    delete this->IS;
    this->IS = NULL;
    return 1;
    }
  
  while (this->ReadNextDataLine(line) &&
         strncmp(line, "part",4) == 0)
    {
    this->ReadNextDataLine(line);
    partId = atoi(line) - 1; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetOutput(realId);
    numPts = output->GetNumberOfPoints();
    if (numPts)
      {
      this->ReadNextDataLine(line); // "coordinates" or "block"
      int partial = this->CheckForUndefOrPartial(line);
      if (component == 0)
        {
        scalars = vtkFloatArray::New();
        scalars->SetNumberOfTuples(numPts);
        scalars->SetNumberOfComponents(numberOfComponents);
        scalars->Allocate(numPts * numberOfComponents);
        }
      else
        {
        scalars = (vtkFloatArray*)(output->GetPointData()->
                                   GetArray(description));
        }

      // If the keyword 'partial' was found, we should replace unspecified
      // coordinate to take the value specified in the 'undef' field
      if( partial )
        {
        int l = 0;
        double val;
        for (i = 0; i < numPts; i++)
          {
          if( i == this->UndefPartial->PartialCoordinates[l] )
            {
            this->ReadNextDataLine(line);
            val = atof( line );
            }
          else
            {
            val = this->UndefPartial->UndefCoordinates;
            l++;
            }
          scalars->InsertComponent(i, component, val);
          }
        }
      else
        {
        for (i = 0; i < numPts; i++)
          {
          this->ReadNextDataLine(line);
          scalars->InsertComponent(i, component, atof(line));
          }
        }

      if (component == 0)
        {
        scalars->SetName(description);
        output->GetPointData()->AddArray(scalars);
        if (!output->GetPointData()->GetScalars())
          {
          output->GetPointData()->SetScalars(scalars);
          }
        scalars->Delete();
        }
      else
        {
        output->GetPointData()->AddArray(scalars);
        }
      }
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::ReadVectorsPerNode(const char* fileName, const char* description,
                                             int timeStep, int measured)
{
  char line[256], formatLine[256], tempLine[256]; 
  int partId, realId, numPts, i, j, numLines, moreVectors;
  vtkFloatArray *vectors;
  float vector1[3], vector2[3];
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL VectorPerNode variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to vector per node file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadNextDataLine(line); // skip the description line

  if (measured)
    {
    output = this->GetOutput(this->NumberOfGeometryParts);
    numPts = output->GetNumberOfPoints();
    if (numPts)
      {
      this->ReadNextDataLine(line);
      numLines = numPts / 2;
      moreVectors = ((numPts * 3) % 6) / 3;
      vectors = vtkFloatArray::New();
      vectors->SetNumberOfTuples(numPts);
      vectors->SetNumberOfComponents(3);
      vectors->Allocate(numPts*3);
      for (i = 0; i < numLines; i++)
        {
        sscanf(line, " %12e %12e %12e %12e %12e %12e", &vector1[0],
               &vector1[1], &vector1[2], &vector2[0], &vector2[1],
               &vector2[2]);
        vectors->InsertTuple(i*2, vector1);
        vectors->InsertTuple(i*2 + 1, vector2);
        this->ReadNextDataLine(line);
        }
      strcpy(formatLine, "");
      strcpy(tempLine, "");
      for (j = 0; j < moreVectors; j++)
        {
        strcat(formatLine, " %12e %12e %12e");
        sscanf(line, formatLine, &vector1[0], &vector1[1], &vector1[2]);
        vectors->InsertTuple(i*2 + j, vector1);
        strcat(tempLine, " %*12e %*12e %*12e");
        strcpy(formatLine, tempLine);
        }
      vectors->SetName(description);
      output->GetPointData()->AddArray(vectors);
      if (!output->GetPointData()->GetVectors())
        {
        output->GetPointData()->SetVectors(vectors);
        }
      vectors->Delete();
      }
    delete this->IS;
    this->IS = NULL;
    return 1;
    }
  
  while (this->ReadNextDataLine(line) &&
         strncmp(line, "part",4) == 0)
    {
    this->ReadNextDataLine(line);
    partId = atoi(line) - 1; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetOutput(realId);
    numPts = output->GetNumberOfPoints();
    if (numPts)
      {
      vectors = vtkFloatArray::New();
      this->ReadNextDataLine(line); // "coordinates" or "block"
      vectors->SetNumberOfTuples(numPts);
      vectors->SetNumberOfComponents(3);
      vectors->Allocate(numPts*3);
      for (i = 0; i < 3; i++)
        {
        for (j = 0; j < numPts; j++)
          {
          this->ReadNextDataLine(line);
          vectors->InsertComponent(j, i, atof(line));
          }
        }
      vectors->SetName(description);
      output->GetPointData()->AddArray(vectors);
      if (!output->GetPointData()->GetVectors())
        {
        output->GetPointData()->SetVectors(vectors);
        }
      vectors->Delete();
      }
    }

  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::ReadTensorsPerNode(const char* fileName, const char* description,
                                             int timeStep)
{
  char line[256];
  int partId, realId, numPts, i, j;
  vtkFloatArray *tensors;
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL TensorPerNode variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to tensor per node file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadNextDataLine(line); // skip the description line

  while (this->ReadNextDataLine(line) &&
         strncmp(line, "part",4) == 0)
    {
    this->ReadNextDataLine(line);
    partId = atoi(line) - 1; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetOutput(realId);
    numPts = output->GetNumberOfPoints();
    if (numPts)
      {
      tensors = vtkFloatArray::New();
      this->ReadNextDataLine(line); // "coordinates" or "block"
      tensors->SetNumberOfTuples(numPts);
      tensors->SetNumberOfComponents(6);
      tensors->Allocate(numPts*6);
      for (i = 0; i < 6; i++)
        {
        for (j = 0; j < numPts; j++)
          {
          this->ReadNextDataLine(line);
          tensors->InsertComponent(j, i, atof(line));
          }
        }
      tensors->SetName(description);
      output->GetPointData()->AddArray(tensors);
      tensors->Delete();
      }
    }

  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::ReadScalarsPerElement(const char* fileName,
                                                const char* description,
                                                int timeStep,
                                                int numberOfComponents,
                                                int component)
{
  char line[256];
  int partId, realId, numCells, numCellsPerElement, i, idx;
  vtkFloatArray *scalars;
  int lineRead, elementType;
  float scalar;
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL ScalarPerElement variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to scalar per element file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadNextDataLine(line); // skip the description line
  lineRead = this->ReadNextDataLine(line); // "part"
  
  while (lineRead && strncmp(line, "part",4) == 0)
    {
    this->ReadNextDataLine(line);
    partId = atoi(line) - 1; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetOutput(realId);
    numCells = output->GetNumberOfCells();
    if (numCells)
      {
      this->ReadNextDataLine(line); // element type or "block"
      if (component == 0)
        {
        scalars = vtkFloatArray::New();
        scalars->SetNumberOfComponents(numberOfComponents);
        scalars->SetNumberOfTuples(numCells);
        }
      else
        {
        scalars =
          (vtkFloatArray*)(output->GetCellData()->GetArray(description));
        }
    
      // need to find out from CellIds how many cells we have of this element
      // type (and what their ids are) -- IF THIS IS NOT A BLOCK SECTION
      if (strncmp(line, "block",5) == 0)
        {
        for (i = 0; i < numCells; i++)
          {
          this->ReadNextDataLine(line);
          scalar = atof(line);
          scalars->InsertComponent(i, component, scalar);
          }
        lineRead = this->ReadNextDataLine(line);
        }
      else 
        {
        while (lineRead && strncmp(line, "part",4) != 0 &&
               strncmp(line, "END TIME STEP", 13) != 0)
          {
          elementType = this->GetElementType(line);
          // Check if line contains either 'partial' or 'undef' keyword
          int partial = this->CheckForUndefOrPartial(line);
          if (elementType == -1)
            {
            vtkErrorMacro("Unknown element type \"" << line << "\"");
            delete this->IS;
            this->IS = NULL;
            if (component == 0)
              {
              scalars->Delete();
              }
            return 0;
            }
          idx = this->UnstructuredPartIds->IsId(realId);
          numCellsPerElement =
            this->GetCellIds(idx, elementType)->GetNumberOfIds();
          // If the 'partial' keyword was found, we should replace 
          // unspecified coordinate with value specified in the 'undef' section
         if( partial )
            {
            int j = 0;
            for (i = 0; i < numCellsPerElement; i++)
              {
              if( i == this->UndefPartial->PartialElementTypes[j] )
                {
                this->ReadNextDataLine(line);
                scalar = atof(line);
                }
              else
                {
                scalar = this->UndefPartial->UndefElementTypes;
                j++; //go on to the next value in the partial list
                }
              scalars->InsertComponent( this->GetCellIds(idx, 
                elementType)->GetId(i), component, scalar);
              }
            }
          else
            {
            for (i = 0; i < numCellsPerElement; i++)
              {
              this->ReadNextDataLine(line);
              scalar = atof(line);
              scalars->InsertComponent( this->GetCellIds(idx, 
                elementType)->GetId(i), component, scalar);
              }
            }
          lineRead = this->ReadNextDataLine(line);
          } // end while
        } // end else
      if (component == 0)
        {
        scalars->SetName(description);
        output->GetCellData()->AddArray(scalars);
        if (!output->GetCellData()->GetScalars())
          {
          output->GetCellData()->SetScalars(scalars);
          }
        scalars->Delete();
        }
      else
        {
        output->GetCellData()->AddArray(scalars);
        }
      }
    else
      {
      lineRead = this->ReadNextDataLine(line);
      }
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::ReadVectorsPerElement(const char* fileName,
                                                const char* description,
                                                int timeStep)
{
  char line[256];
  int partId, realId, numCells, numCellsPerElement, i, j, idx;
  vtkFloatArray *vectors;
  int lineRead, elementType;
  float value;
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL VectorPerElement variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to vector per element file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadNextDataLine(line); // skip the description line
  lineRead = this->ReadNextDataLine(line); // "part"
  
  while (lineRead && strncmp(line, "part",4) == 0)
    {
    this->ReadNextDataLine(line);
    partId = atoi(line) - 1; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetOutput(realId);
    numCells = output->GetNumberOfCells();
    if (numCells)
      {
      vectors = vtkFloatArray::New();
      this->ReadNextDataLine(line); // element type or "block"
      vectors->SetNumberOfTuples(numCells);
      vectors->SetNumberOfComponents(3);
      vectors->Allocate(numCells*3);
    
      // need to find out from CellIds how many cells we have of this element
      // type (and what their ids are) -- IF THIS IS NOT A BLOCK SECTION
      if (strncmp(line, "block",5) == 0)
        {
        for (i = 0; i < 3; i++)
          {
          for (j = 0; j < numCells; j++)
            {
            this->ReadNextDataLine(line);
            value = atof(line);
            vectors->InsertComponent(j, i, value);
            }
          }
        lineRead = this->ReadNextDataLine(line);
        }
      else 
        {
        while (lineRead && strncmp(line, "part",4) != 0 &&
               strncmp(line, "END TIME STEP", 13) != 0)
          {
          elementType = this->GetElementType(line);
          if (elementType == -1)
            {
            vtkErrorMacro("Unknown element type \"" << line << "\"");
            delete this->IS;
            this->IS = NULL;
            vectors->Delete();
            return 0;
            }
          idx = this->UnstructuredPartIds->IsId(realId);
          numCellsPerElement =
            this->GetCellIds(idx, elementType)->GetNumberOfIds();
          for (i = 0; i < 3; i++)
            {
            for (j = 0; j < numCellsPerElement; j++)
              {
              this->ReadNextDataLine(line);
              value = atof(line);
              vectors->InsertComponent(this->GetCellIds(idx, elementType)->GetId(j),
                                       i, value);
              }
            }
          lineRead = this->ReadNextDataLine(line);
          } // end while
        } // end else
      vectors->SetName(description);
      output->GetCellData()->AddArray(vectors);
      if (!output->GetCellData()->GetVectors())
        {
        output->GetCellData()->SetVectors(vectors);
        }
      vectors->Delete();
      }
    else
      {
      lineRead = this->ReadNextDataLine(line);
      }
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::ReadTensorsPerElement(const char* fileName,
                                                const char* description,
                                                int timeStep)
{
  char line[256];
  int partId, realId, numCells, numCellsPerElement, i, j, idx;
  vtkFloatArray *tensors;
  int lineRead, elementType;
  float value;
  vtkDataSet *output;
  
  // Initialize
  //
  if (!fileName)
    {
    vtkErrorMacro("NULL TensorPerElement variable file name");
    return 0;
    }
  vtkstd::string sfilename;
  if (this->FilePath)
    {
    sfilename = this->FilePath;
    if (sfilename.at(sfilename.length()-1) != '/')
      {
      sfilename += "/";
      }
    sfilename += fileName;
    vtkDebugMacro("full path to tensor per element file: " << sfilename.c_str());
    }
  else
    {
    sfilename = fileName;
    }
  
  this->IS = new ifstream(sfilename.c_str(), ios::in);
  if (this->IS->fail())
    {
    vtkErrorMacro("Unable to open file: " << sfilename.c_str());
    delete this->IS;
    this->IS = NULL;
    return 0;
    }

  if (this->UseFileSets)
    {
    for (i = 0; i < timeStep - 1; i++)
      {
      this->ReadLine(line);
      while (strncmp(line, "END TIME STEP", 13) != 0)
        {
        this->ReadLine(line);
        }
      }
  
    this->ReadLine(line);
    while (strncmp(line, "BEGIN TIME STEP", 15) != 0)
      {
      this->ReadLine(line);
      }
    }

  this->ReadNextDataLine(line); // skip the description line
  lineRead = this->ReadNextDataLine(line); // "part"
  
  while (lineRead && strncmp(line, "part",4) == 0)
    {
    this->ReadNextDataLine(line);
    partId = atoi(line) - 1; // EnSight starts #ing with 1.
    realId = this->InsertNewPartId(partId);
    output = this->GetOutput(realId);
    numCells = output->GetNumberOfCells();
    if (numCells)
      {
      tensors = vtkFloatArray::New();
      this->ReadNextDataLine(line); // element type or "block"
      tensors->SetNumberOfTuples(numCells);
      tensors->SetNumberOfComponents(6);
      tensors->Allocate(numCells*6);
    
      // need to find out from CellIds how many cells we have of this element
      // type (and what their ids are) -- IF THIS IS NOT A BLOCK SECTION
      if (strncmp(line, "block",5) == 0)
        {
        for (i = 0; i < 6; i++)
          {
          for (j = 0; j < numCells; j++)
            {
            this->ReadNextDataLine(line);
            value = atof(line);
            tensors->InsertComponent(j, i, value);
            }
          }
        lineRead = this->ReadNextDataLine(line);
        }
      else 
        {
        while (lineRead && strncmp(line, "part",4) != 0 &&
               strncmp(line, "END TIME STEP", 13) != 0)
          {
          elementType = this->GetElementType(line);
          if (elementType == -1)
            {
            vtkErrorMacro("Unknown element type \"" << line << "\"");
            delete [] this->IS;
            this->IS = NULL;
            tensors->Delete();
            return 0;
            }
          idx = this->UnstructuredPartIds->IsId(realId);
          numCellsPerElement =
            this->GetCellIds(idx, elementType)->GetNumberOfIds();
          for (i = 0; i < 6; i++)
            {
            for (j = 0; j < numCellsPerElement; j++)
              {
              this->ReadNextDataLine(line);
              value = atof(line);
              tensors->InsertComponent(this->GetCellIds(idx, elementType)->GetId(j),
                                       i, value);
              }
            }
          lineRead = this->ReadNextDataLine(line);
          } // end while
        } // end else
      tensors->SetName(description);
      output->GetCellData()->AddArray(tensors);
      tensors->Delete();
      }
    else
      {
      lineRead = this->ReadNextDataLine(line);
      }
    }
  
  delete this->IS;
  this->IS = NULL;
  return 1;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::CreateUnstructuredGridOutput(int partId,
                                                       char line[256],
                                                       const char* name)
{
  int lineRead = 1;
  char subLine[256];
  int i, j;
  vtkIdType *nodeIds;
  int *intIds;
  int numElements;
  int idx, cellType;
  vtkIdType cellId;
  
  this->NumberOfNewOutputs++;
  
  if (this->GetOutput(partId) == NULL)
    {
    vtkDebugMacro("creating new unstructured output");
    vtkUnstructuredGrid* ugrid = vtkUnstructuredGrid::New();
    this->SetNthOutput(partId, ugrid);
    ugrid->Delete();
    
    this->UnstructuredPartIds->InsertNextId(partId);
    }
  else if ( ! this->GetOutput(partId)->IsA("vtkUnstructuredGrid"))
    {
    vtkErrorMacro("Cannot change type of output");
    this->OutputsAreValid = 0;
    return 0;
    }
  
  vtkUnstructuredGrid* output = vtkUnstructuredGrid::SafeDownCast(
    this->GetOutput(partId));    

  vtkCharArray* nmArray =  vtkCharArray::New();
  nmArray->SetName("Name");
  size_t len = strlen(name);
  nmArray->SetNumberOfTuples(static_cast<vtkIdType>(len)+1);
  char* copy = nmArray->GetPointer(0);
  memcpy(copy, name, len);
  copy[len] = '\0';
  output->GetFieldData()->AddArray(nmArray);
  nmArray->Delete();

  // Clear all cell ids from the last execution, if any.
  idx = this->UnstructuredPartIds->IsId(partId);
  for (i = 0; i < 16; i++)
    {
    this->GetCellIds(idx, i)->Reset();
    }
  
  output->Allocate(1000);
  
  while(lineRead && strncmp(line, "part", 4) != 0)
    {
    if (strncmp(line, "coordinates", 11) == 0)
      {
      vtkDebugMacro("coordinates");
      int numPts;
      vtkPoints *points = vtkPoints::New();
      double point[3];
      
      this->ReadNextDataLine(line);
      numPts = atoi(line);
      vtkDebugMacro("num. points: " << numPts);
      
      points->Allocate(numPts);
      
      for (i = 0; i < numPts; i++)
        {
        this->ReadNextDataLine(line);
        points->InsertNextPoint(atof(line), 0, 0);
        }
      for (i = 0; i < numPts; i++)
        {
        this->ReadNextDataLine(line);
        points->GetPoint(i, point);
        points->SetPoint(i, point[0], atof(line), 0);
        }
      for (i = 0; i < numPts; i++)
        {
        this->ReadNextDataLine(line);
        points->GetPoint(i, point);
        points->SetPoint(i, point[0], point[1], atof(line));
        }
      
      lineRead = this->ReadNextDataLine(line);
      sscanf(line, " %s", subLine);

      char *endptr;
      strtod(subLine, &endptr); // Testing is we can convert this string to double
      if ( subLine != endptr )
        { // necessary if node ids were listed
        for (i = 0; i < numPts; i++)
          {
          points->GetPoint(i, point);
          points->SetPoint(i, point[1], point[2], atof(line));
          lineRead = this->ReadNextDataLine(line);
          }
        }
      output->SetPoints(points);
      points->Delete();
      }
    else if (strncmp(line, "point", 5) == 0)
      {
      int *elementIds;
      vtkDebugMacro("point");
      
      nodeIds = new vtkIdType[1];        
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      elementIds = new int[numElements];
      
      for (i = 0; i < numElements; i++)
        {
        this->ReadNextDataLine(line);
        elementIds[i] = atoi(line);
        }
      lineRead = this->ReadNextDataLine(line);
      sscanf(line, " %s", subLine);
      if (isdigit(subLine[0]))
        {
        for (i = 0; i < numElements; i++)
          {
          nodeIds[0] = atoi(line) - 1; // because EnSight ids start at 1
          cellId = output->InsertNextCell(VTK_VERTEX, 1, nodeIds);
          this->GetCellIds(idx, vtkEnSightReader::POINT)->InsertNextId(cellId);
          lineRead = this->ReadNextDataLine(line);
          }
        }
      else
        {
        for (i = 0; i < numElements; i++)
          {
          nodeIds[0] = elementIds[i] - 1;
          cellId = output->InsertNextCell(VTK_VERTEX, 1, nodeIds);
          this->GetCellIds(idx, vtkEnSightReader::POINT)->InsertNextId(cellId);
          }
        }
      
      delete [] nodeIds;
      delete [] elementIds;
      }
    else if (strncmp(line, "bar2", 4) == 0)
      {
      vtkDebugMacro("bar2");
      
      nodeIds = new vtkIdType[2];
      intIds = new int[2];
      
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      this->ReadNextDataLine(line);
      if (sscanf(line, " %d %d", &intIds[0], &intIds[1]) != 2)
        {
        for (i = 0; i < numElements; i++)
          {
          // Skip the element ids since they are just labels.
          this->ReadNextDataLine(line);
          }
        }
      for (i = 0; i < numElements; i++)
        {
        sscanf(line, " %d %d", &intIds[0], &intIds[1]);
        for (j = 0; j < 2; j++)
          {
          intIds[j]--;
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_LINE, 2, nodeIds);
        this->GetCellIds(idx, vtkEnSightReader::BAR2)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "bar3", 4) == 0)
      {
      vtkDebugMacro("bar3");
      vtkDebugMacro("Only vertex nodes of this element will be read.");
      nodeIds = new vtkIdType[2];
      intIds = new int[2];
      
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      this->ReadNextDataLine(line);
      if (sscanf(line, " %d %*d %d", &intIds[0], &intIds[1]) != 2)
        {
        for (i = 0; i < numElements; i++)
          {
          // Skip the element ids since they are just labels.
          this->ReadNextDataLine(line);
          }
        }
      for (i = 0; i < numElements; i++)
        {
        sscanf(line, " %d %*d %d", &intIds[0], &intIds[1]);
        for (j = 0; j < 2; j++)
          {
          intIds[j]--;
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_LINE, 2, nodeIds);
        this->GetCellIds(idx, vtkEnSightReader::BAR3)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }      
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "nsided", 6) == 0)
      {
      int numNodes;
      char ** newLines;
      char formatLine[256], tempLine[256];
      
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      newLines = new char *[numElements*2];
      for (i = 0; i < numElements*2; i++)
        {
        newLines[i] = new char[256];
        this->ReadNextDataLine(newLines[i]);
        }
      lineRead = this->ReadNextDataLine(line);
      if (lineRead)
        {
        sscanf(line, " %s", subLine);
        }
      if (lineRead && isdigit(subLine[0]))
        {
        // We still need to read in the node ids for each element.
        for (i = 0; i < numElements; i++)
          {
          numNodes = atoi(newLines[numElements+i]);
          nodeIds = new vtkIdType[numNodes];
          intIds = new int[numNodes];
          
          strcpy(formatLine, "");
          strcpy(tempLine, "");
          for (j = 0; j < numNodes; j++)
            {
            strcat(formatLine, " %d");
            sscanf(line, formatLine, &intIds[numNodes-j-1]);
            strcat(tempLine, " %*d");
            strcpy(formatLine, tempLine);
            intIds[numNodes-j-1]--;
            nodeIds[numNodes-j-1] = intIds[numNodes-j-1];
            }
          cellId = output->InsertNextCell(VTK_POLYGON, numNodes, nodeIds);
          this->GetCellIds(idx, vtkEnSightReader::NSIDED)->InsertNextId(cellId);
          lineRead = this->ReadNextDataLine(line);
          delete [] nodeIds;
          delete [] intIds;
          }
        }
      else
        {
        // We have already read in the lines with node ids into newLines.
        for (i = 0; i < numElements; i++)
          {
          numNodes = atoi(newLines[i]);
          nodeIds = new vtkIdType[numNodes];
          intIds = new int[numNodes];
          
          strcpy(formatLine, "");
          strcpy(tempLine, "");
          for (j = 0; j < numNodes; j++)
            {
            strcat(formatLine, " %d");
            sscanf(newLines[numElements+i], formatLine,
                   &intIds[numNodes-j-1]);
            intIds[numNodes-j-1]--;
            nodeIds[numNodes-j-1] = intIds[numNodes-j-1];
            strcat(tempLine, " %*d");
            strcpy(formatLine, tempLine);
            }
          cellId = output->InsertNextCell(VTK_POLYGON, numNodes, nodeIds);
          this->GetCellIds(idx, vtkEnSightReader::NSIDED)->InsertNextId(cellId);
          delete [] nodeIds;
          delete [] intIds;
          }
        }
      for (i = 0; i < numElements*2; i++)
        {
        delete [] newLines[i];
        newLines[i] = NULL;
        }
      delete [] newLines;
      }
    else if (strncmp(line, "tria3", 5) == 0 ||
             strncmp(line, "tria6", 5) == 0)
      {
      if (strncmp(line, "tria6", 5) == 0)
        {
        vtkDebugMacro("tria6");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::TRIA6;
        }
      else
        {
        vtkDebugMacro("tria3");
        cellType = vtkEnSightReader::TRIA3;
        }
      
      nodeIds = new vtkIdType[3];
      intIds = new int[3];
      
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      this->ReadNextDataLine(line);
      if (sscanf(line, " %d %d %d", &intIds[0], &intIds[1],
                 &intIds[2]) != 3)
        {
        for (i = 0; i < numElements; i++)
          {
          // Skip the element ids since they are just labels.
          this->ReadNextDataLine(line);
          }
        }
      for (i = 0; i < numElements; i++)
        {
        sscanf(line, " %d %d %d", &intIds[0], &intIds[1], &intIds[2]);
        for (j = 0; j < 3; j++)
          {
          intIds[j]--;
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_TRIANGLE, 3, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }      
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "quad4", 5) == 0 ||
             strncmp(line, "quad8", 5) == 0)
      {
      if (strncmp(line, "quad8", 5) == 0)
        {
        vtkDebugMacro("quad8");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::QUAD8;
        }
      else
        {
        vtkDebugMacro("quad4");
        cellType = vtkEnSightReader::QUAD4;
        }
      
      nodeIds = new vtkIdType[4];
      intIds = new int[4];
      
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      this->ReadNextDataLine(line);
      if (sscanf(line, " %d %d %d %d", &intIds[0], &intIds[1], &intIds[2],
                 &intIds[3]) != 4)
        {
        for (i = 0; i < numElements; i++)
          {
          // Skip the element ids since they are just labels.
          this->ReadNextDataLine(line);
          }
        }
      for (i = 0; i < numElements; i++)
        {
        sscanf(line, " %d %d %d %d", &intIds[0], &intIds[1], &intIds[2],
               &intIds[3]);
        for (j = 0; j < 4; j++)
          {
          intIds[j]--;
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_QUAD, 4, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }      
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "tetra4", 6) == 0 ||
             strncmp(line, "tetra10", 7) == 0)
      {
      if (strncmp(line, "tetra10", 7) == 0)
        {
        vtkDebugMacro("tetra10");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::TETRA10;
        }
      else
        {
        vtkDebugMacro("tetra4");
        cellType = vtkEnSightReader::TETRA4;
        }
      
      nodeIds = new vtkIdType[4];
      intIds = new int[4];
      
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      this->ReadNextDataLine(line);
      if (sscanf(line, " %d %d %d %d", &intIds[0], &intIds[1],
                 &intIds[2], &intIds[3]) != 4)
        {
        for (i = 0; i < numElements; i++)
          {
          // Skip the element ids since they are just labels.
          this->ReadNextDataLine(line);
          }
        }
      for (i = 0; i < numElements; i++)
        {
        sscanf(line, " %d %d %d %d", &intIds[0], &intIds[1], &intIds[2],
               &intIds[3]);
        for (j = 0; j < 4; j++)
          {
          intIds[j]--;
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_TETRA, 4, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "pyramid5", 8) == 0 ||
             strncmp(line, "pyramid13", 9) == 0)
      {
      if (strncmp(line, "pyramid13", 9) == 0)
        {
        vtkDebugMacro("pyramid13");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::PYRAMID13;
        }
      else
        {
        vtkDebugMacro("pyramid5");
        cellType = vtkEnSightReader::PYRAMID5;
        }
      
      nodeIds = new vtkIdType[5];
      intIds = new int[5];
      
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      this->ReadNextDataLine(line);
      if (sscanf(line, " %d %d %d %d %d", &intIds[0], &intIds[1], &intIds[2],
                 &intIds[3], &intIds[4]) != 5)
        {
        for (i = 0; i < numElements; i++)
          {
          // Skip the element ids since they are just labels.
          this->ReadNextDataLine(line);
          }
        }
      for (i = 0; i < numElements; i++)
        {
        sscanf(line, " %d %d %d %d %d", &intIds[0], &intIds[1], &intIds[2],
               &intIds[3], &intIds[4]);
        for (j = 0; j < 5; j++)
          {
          intIds[j]--;
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_PYRAMID, 5, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }          
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "hexa8", 5) == 0 ||
             strncmp(line, "hexa20", 6) == 0)
      {
      if (strncmp(line, "hexa20", 6) == 0)
        {
        vtkDebugMacro("hexa20");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::HEXA20;
        }
      else
        {
        vtkDebugMacro("hexa8");
        cellType = vtkEnSightReader::HEXA8;
        }
      
      nodeIds = new vtkIdType[8];
      intIds = new int[8];
      
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      this->ReadNextDataLine(line);
      if (sscanf(line, " %d %d %d %d %d %d %d %d", &intIds[0], &intIds[1],
                 &intIds[2], &intIds[3], &intIds[4], &intIds[5], &intIds[6],
                 &intIds[7]) != 8)
        {
        for (i = 0; i < numElements; i++)
          {
          // Skip the element ids since they are just labels.
          this->ReadNextDataLine(line);
          }
        }
      for (i = 0; i < numElements; i++)
        {
        sscanf(line, " %d %d %d %d %d %d %d %d", &intIds[0], &intIds[1],
               &intIds[2], &intIds[3], &intIds[4], &intIds[5], &intIds[6],
               &intIds[7]);
        for (j = 0; j < 8; j++)
          {
          intIds[j]--;
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_HEXAHEDRON, 8, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }      
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "penta6", 6) == 0 ||
             strncmp(line, "penta15", 7) == 0)
      {
      if (strncmp(line, "penta15", 7) == 0)
        {
        vtkDebugMacro("penta15");
        vtkDebugMacro("Only vertex nodes of this element will be read.");
        cellType = vtkEnSightReader::PENTA15;
        }
      else
        {
        vtkDebugMacro("penta6");
        cellType = vtkEnSightReader::PENTA6;
        }
      
      nodeIds = new vtkIdType[6];
      intIds = new int[6];
      
      this->ReadNextDataLine(line);
      numElements = atoi(line);
      this->ReadNextDataLine(line);
      if (sscanf(line, " %d %d %d %d %d %d", &intIds[0], &intIds[1],
                 &intIds[2], &intIds[3], &intIds[4], &intIds[5]) != 6)
        {
        for (i = 0; i < numElements; i++)
          {
          // Skip the element ids since they are just labels.
          this->ReadNextDataLine(line);
          }
        }
      for (i = 0; i < numElements; i++)
        {
        sscanf(line, " %d %d %d %d %d %d", &intIds[0], &intIds[1], &intIds[2],
               &intIds[3], &intIds[4], &intIds[5]);
        for (j = 0; j < 6; j++)
          {
          intIds[j]--;
          nodeIds[j] = intIds[j];
          }
        cellId = output->InsertNextCell(VTK_WEDGE, 6, nodeIds);
        this->GetCellIds(idx, cellType)->InsertNextId(cellId);
        lineRead = this->ReadNextDataLine(line);
        }      
      delete [] nodeIds;
      delete [] intIds;
      }
    else if (strncmp(line, "END TIME STEP", 13) == 0)
      {
      return 1;
      }
    else if (this->IS->fail())
      {
      //May want consistency check here?
      //vtkWarningMacro("EOF on geometry file");
      return 1;
      }
    else
      {
      vtkErrorMacro("undefined geometry file line");
      return -1;
      }
    }
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::CreateStructuredGridOutput(int partId,
                                                     char line[256],
                                                     const char* name)
{
  char subLine[256];
  int lineRead;
  int iblanked = 0;
  int dimensions[3];
  int i;
  vtkPoints *points = vtkPoints::New();
  double point[3];
  int numPts;
  
  this->NumberOfNewOutputs++;
  
  if (this->GetOutput(partId) == NULL)
    {
    vtkDebugMacro("creating new structured grid output");
    vtkStructuredGrid* sgrid = vtkStructuredGrid::New();
    this->SetNthOutput(partId, sgrid);
    sgrid->Delete();
    }
  else if ( ! this->GetOutput(partId)->IsA("vtkStructuredGrid"))
    {
    vtkErrorMacro("Cannot change type of output");
    this->OutputsAreValid = 0;
    return 0;
    }
  
  vtkStructuredGrid* output = vtkStructuredGrid::SafeDownCast(
    this->GetOutput(partId));    

  vtkCharArray* nmArray =  vtkCharArray::New();
  nmArray->SetName("Name");
  size_t len = strlen(name);
  nmArray->SetNumberOfTuples(static_cast<vtkIdType>(len)+1);
  char* copy = nmArray->GetPointer(0);
  memcpy(copy, name, len);
  copy[len] = '\0';
  output->GetFieldData()->AddArray(nmArray);
  nmArray->Delete();

  if (sscanf(line, " %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "iblanked",8) == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadNextDataLine(line);
  sscanf(line, " %d %d %d", &dimensions[0], &dimensions[1], &dimensions[2]);
  output->SetDimensions(dimensions);
  output->SetWholeExtent(
    0, dimensions[0]-1, 0, dimensions[1]-1, 0, dimensions[2]-1);
  numPts = dimensions[0] * dimensions[1] * dimensions[2];
  points->Allocate(numPts);
  
  for (i = 0; i < numPts; i++)
    {
    this->ReadNextDataLine(line);
    points->InsertNextPoint(atof(line), 0.0, 0.0);
    }
  for (i = 0; i < numPts; i++)
    {
    this->ReadNextDataLine(line);
    points->GetPoint(i, point);
    points->SetPoint(i, point[0], atof(line), point[2]);
    }
  for (i = 0; i < numPts; i++)
    {
    this->ReadNextDataLine(line);
    points->GetPoint(i, point);
    points->SetPoint(i, point[0], point[1], atof(line));
    }
  output->SetPoints(points);
  if (iblanked)
    {
    for (i = 0; i < numPts; i++)
      {
      this->ReadNextDataLine(line);
      if (!atoi(line))
        {
        output->BlankPoint(i);
        }
      }
    }
  
  points->Delete();
  // reading next line to check for EOF
  lineRead = this->ReadNextDataLine(line);
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::CreateRectilinearGridOutput(int partId,
                                                      char line[256],
                                                      const char* name)
{
  char subLine[256];
  int lineRead;
  int iblanked = 0;
  int dimensions[3];
  int i;
  vtkFloatArray *xCoords = vtkFloatArray::New();
  vtkFloatArray *yCoords = vtkFloatArray::New();
  vtkFloatArray *zCoords = vtkFloatArray::New();
  int numPts;
  
  this->NumberOfNewOutputs++;
  
  if (this->GetOutput(partId) == NULL)
    {
    vtkDebugMacro("creating new structured grid output");
    vtkRectilinearGrid* rgrid = vtkRectilinearGrid::New();
    this->SetNthOutput(partId, rgrid);
    rgrid->Delete();
    }
  else if ( ! this->GetOutput(partId)->IsA("vtkRectilinearGrid"))
    {
    vtkErrorMacro("Cannot change type of output");
    this->OutputsAreValid = 0;
    return 0;
    }

  vtkRectilinearGrid* output = vtkRectilinearGrid::SafeDownCast(
    this->GetOutput(partId));    

  vtkCharArray* nmArray =  vtkCharArray::New();
  nmArray->SetName("Name");
  size_t len = strlen(name);
  nmArray->SetNumberOfTuples(static_cast<vtkIdType>(len)+1);
  char* copy = nmArray->GetPointer(0);
  memcpy(copy, name, len);
  copy[len] = '\0';
  output->GetFieldData()->AddArray(nmArray);
  nmArray->Delete();

  
  if (sscanf(line, " %*s %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "iblanked",8) == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadNextDataLine(line);
  sscanf(line, " %d %d %d", &dimensions[0], &dimensions[1], &dimensions[2]);
  output->SetDimensions(dimensions);
  output->SetWholeExtent(
    0, dimensions[0]-1, 0, dimensions[1]-1, 0, dimensions[2]-1);
  xCoords->Allocate(dimensions[0]);
  yCoords->Allocate(dimensions[1]);
  zCoords->Allocate(dimensions[2]);
  numPts = dimensions[0] * dimensions[1] * dimensions[2];

  float val;

  for (i = 0; i < dimensions[0]; i++)
    {
    this->ReadNextDataLine(line);
    val = atof(line);
    xCoords->InsertNextTuple(&val);
    }
  for (i = 0; i < dimensions[1]; i++)
    {
    this->ReadNextDataLine(line);
    val = atof(line);
    yCoords->InsertNextTuple(&val);
    }
  for (i = 0; i < dimensions[2]; i++)
    {
    this->ReadNextDataLine(line);
    val = atof(line);
    zCoords->InsertNextTuple(&val);
    }
  if (iblanked)
    {
    vtkDebugMacro("VTK does not handle blanking for rectilinear grids.");
    for (i = 0; i < numPts; i++)
      {
      this->ReadNextDataLine(line);
      }
    }
  
  output->SetXCoordinates(xCoords);  
  output->SetYCoordinates(yCoords);
  output->SetZCoordinates(zCoords);

  xCoords->Delete();
  yCoords->Delete();
  zCoords->Delete();
  
  // reading next line to check for EOF
  lineRead = this->ReadNextDataLine(line);
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::CreateImageDataOutput(int partId, 
                                                char line[256],
                                                const char* name)
{
  char subLine[256];
  int lineRead;
  int iblanked = 0;
  int dimensions[3];
  int i;
  float origin[3], delta[3];
  int numPts;
  
  this->NumberOfNewOutputs++;
  
  if (this->GetOutput(partId) == NULL)
    {
    vtkDebugMacro("creating new image data output");
    vtkImageData* idata = vtkImageData::New();
    this->SetNthOutput(partId, idata);
    idata->Delete();
    }
  else if ( ! this->GetOutput(partId)->IsA("vtkImageData"))
    {
    vtkErrorMacro("Cannot change type of output");
    this->OutputsAreValid = 0;
    return 0;
    }

  vtkImageData* output = vtkImageData::SafeDownCast(
    this->GetOutput(partId));    

  vtkCharArray* nmArray =  vtkCharArray::New();
  nmArray->SetName("Name");
  size_t len = strlen(name);
  nmArray->SetNumberOfTuples(static_cast<vtkIdType>(len)+1);
  char* copy = nmArray->GetPointer(0);
  memcpy(copy, name, len);
  copy[len] = '\0';
  output->GetFieldData()->AddArray(nmArray);
  nmArray->Delete();
  
  if (sscanf(line, " %*s %*s %s", subLine) == 1)
    {
    if (strncmp(subLine, "iblanked",8) == 0)
      {
      iblanked = 1;
      }
    }

  this->ReadNextDataLine(line);
  sscanf(line, " %d %d %d", &dimensions[0], &dimensions[1], &dimensions[2]);
  output->SetDimensions(dimensions);
  output->SetWholeExtent(
    0, dimensions[0]-1, 0, dimensions[1]-1, 0, dimensions[2]-1);
  
  for (i = 0; i < 3; i++)
    {
    this->ReadNextDataLine(line);
    sscanf(line, " %f", &origin[i]);
    }
  output->SetOrigin(origin[0], origin[1], origin[2]);
  
  for (i = 0; i < 3; i++)
    {
    this->ReadNextDataLine(line);
    sscanf(line, " %f", &delta[i]);
    }
  
  output->SetSpacing(delta[0], delta[1], delta[2]);
  
  if (iblanked)
    {
    vtkDebugMacro("VTK does not handle blanking for image data.");
    numPts = dimensions[0] * dimensions[1] * dimensions[2];
    for (i = 0; i < numPts; i++)
      {
      this->ReadNextDataLine(line);
      }
    }
  
  // reading next line to check for EOF
  lineRead = this->ReadNextDataLine(line);
  return lineRead;
}

//----------------------------------------------------------------------------
int vtkEnSightGoldReader::CheckForUndefOrPartial(const char *line)
{
  char undefvar[16];
  // Look for keyword 'partial' or 'undef':
  int r = sscanf(line, "%*s %s", undefvar);
  if( r == 1)
    {
    char subline[80];
    if( strcmp(undefvar, "undef") == 0 )
      {
      vtkDebugMacro( "undef: " << line );
      this->ReadNextDataLine(subline);
      double val = atof( subline );
      switch( this->GetSectionType(line) )
        {
        case vtkEnSightReader::COORDINATES:
          this->UndefPartial->UndefCoordinates = val;
          break;
        case vtkEnSightReader::BLOCK:
          this->UndefPartial->UndefBlock = val;
          break;
        case vtkEnSightReader::ELEMENT:
          this->UndefPartial->UndefElementTypes = val;
          break;
        default:
          vtkErrorMacro( << "Unknow section type: " << subline );
        }
      return 0; //meaning 'undef', so no other steps is necesserary
      }
    else if ( strcmp(undefvar, "partial") == 0 )
      {
      vtkDebugMacro( "partial: " << line );
      this->ReadNextDataLine( subline );
      int nLines = atoi(subline);
      vtkIdType val;
      int i;
      switch( this->GetSectionType(line) )
        {
        case vtkEnSightReader::COORDINATES:
          for(i=0; i<nLines; ++i)
            {
            this->ReadNextDataLine(subline);
            val = atoi(subline) - 1; //EnSight start at 1
            this->UndefPartial->PartialCoordinates.push_back(val);
            }
          break;
        case vtkEnSightReader::BLOCK:
          for(i=0; i<nLines; ++i)
            {
            this->ReadNextDataLine(subline);
            val = atoi(subline) - 1; //EnSight start at 1
            this->UndefPartial->PartialBlock.push_back(val);
            }
          break;
        case vtkEnSightReader::ELEMENT:
          for(i=0; i<nLines; ++i)
            {
            this->ReadNextDataLine(subline);
            val = atoi(subline) - 1; //EnSight start at 1
            this->UndefPartial->PartialElementTypes.push_back(val);
            }
          break;
        default:
          vtkErrorMacro( << "Unknow section type: " << subline );
        }
      return 1; //meaning 'partial', so other steps are necesserary
      }
    }
  return 0;
}

//----------------------------------------------------------------------------
void vtkEnSightGoldReader::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);
}
