Area contour spectrum (vtkPolyData)

Graphics/CMakeLists.txt

@@ -16,6 +16,7 @@ vtkAppendPolyData.cxx
 vtkAppendSelection.cxx
 vtkApproximatingSubdivisionFilter.cxx
 vtkArcSource.cxx
+vtkAreaContourSignatureFilter.cxx
 vtkArrayCalculator.cxx
 vtkArrowSource.cxx
 vtkAssignAttribute.cxx

Graphics/vtkAreaContourSignatureFilter.h

+/*=========================================================================
+
+  Program:   Visualization Toolkit
+  Module:    $RCSfile$
+
+  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.
+
+=========================================================================*/
+// .NAME vtkAreaContourSignatureFilter - compute an approximation of the area
+// contour signature (evolution of the area of the input surface along an arc of
+// the Reeb graph).
+// .SECTION Description
+// The filter takes a vtkPolyData as an input (port 0), along with a
+// vtkReebGraph (port 1).
+// The Reeb graph arc to consider can be specified with SetArcId() (default: 0).
+// The number of (evenly distributed) samples of the signature can be defined
+// with SetNumberOfSamples() (default value: 100).
+// The filter will first try to pull as a scalar field the vtkDataArray with Id
+// 'FieldId' of the vtkPolyData, see SetFieldId (default: 0). The filter will
+// abort if this field does not exist.
+//
+// The filter outputs a vtkTable with the area contour signature
+// approximation, each sample being evenly distributed in the function span of
+// the arc.
+//
+// This filter is a typical example for designing your own contour signature
+// filter (with customized metrics). It also shows typical vtkReebGraph
+// traversals.
+
+#ifndef __vtkAreaContourSignatureFilter_h
+#define __vtkAreaContourSignatureFilter_h
+
+#include  "vtkDataObjectAlgorithm.h"
+#include  "vtkDoubleArray.h"
+#include  "vtkTable.h"
+#include  "vtkTriangle.h"
+#include  "vtkReebGraph.h"
+
+class VTK_GRAPHICS_EXPORT vtkAreaContourSignatureFilter :
+  public vtkDataObjectAlgorithm
+{
+public:
+  static vtkAreaContourSignatureFilter* New();
+  vtkTypeRevisionMacro(vtkAreaContourSignatureFilter, vtkDataObjectAlgorithm);
+  void PrintSelf(ostream& os, vtkIndent indent);
+
+  // Description:
+  // Set the arc Id for which the contour signature has to be computed.
+  // Default value: 0
+  vtkSetMacro(ArcId, vtkIdType);
+  vtkGetMacro(ArcId, vtkIdType);
+
+  // Description:
+  // Set the number of samples in the output signature
+  // Default value: 100
+  vtkSetMacro(NumberOfSamples, int);
+  vtkGetMacro(NumberOfSamples, int);
+
+  // Description:
+  // Set the scalar field Id
+  // Default value: 0
+  vtkSetMacro(FieldId, vtkIdType);
+  vtkGetMacro(FieldId, vtkIdType);
+
+  vtkTable* GetOutput();
+
+protected:
+  vtkAreaContourSignatureFilter();
+  ~vtkAreaContourSignatureFilter();
+
+  vtkIdType ArcId, FieldId;
+  int NumberOfSamples;
+
+  int FillInputPortInformation(int portNumber, vtkInformation *);
+  int FillOutputPortInformation(int portNumber, vtkInformation *info);
+
+  int RequestData(vtkInformation *request,
+    vtkInformationVector **inputVector, vtkInformationVector *outputVector);
+
+private:
+  vtkAreaContourSignatureFilter(
+    const vtkAreaContourSignatureFilter&);
+  // Not implemented.
+  void operator=(const vtkAreaContourSignatureFilter&);
+  // Not implemented.
+};
+
+#endif