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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkReebGraphVolumeSkeletonFilter
* @brief compute a skeletal embedding of the
* Reeb graph of a scalar field defined on a tetrahedral mesh
* (vtkUnstructuredGrid).
*
* The filter takes a vtkUnstructuredGrid as an input (port 0), along with a
* vtkReebGraph (port 1).
* The filter samples each arc of the Reeb graph and embeds the samples on the
* barycenter of the corresponding field contour.
* The number of (evenly distributed) arc samples can be defined with
* SetNumberOfSamples() (default value: 10).
* The skeleton can be optionally smoothed with SetNumberOfSmoothingIterations()
* (default value: 10).
* 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 of points (double[3]). Each column contains the
* samples (sorted by function value) of the corresponding arc. The first and
* the last entry of the column corresponds to the critical nodes at the
* extremity of the arc (each column has NumberOfSamples + 2 entries).
*
* The skeleton can be rendered by linking the samples with geometrical
* primitives (for instance, spheres at critical nodes and cylinders between
* intermediary samples, see Graphics/Testing/Cxx/TestReebGraph.cxx).
*
*/
#ifndef vtkReebGraphVolumeSkeletonFilter_h
#define vtkReebGraphVolumeSkeletonFilter_h
#include "vtkDataObjectAlgorithm.h"
#include "vtkFiltersReebGraphModule.h" // For export macro
VTK_ABI_NAMESPACE_BEGIN
class vtkReebGraph;
class vtkTable;
class VTKFILTERSREEBGRAPH_EXPORT vtkReebGraphVolumeSkeletonFilter : public vtkDataObjectAlgorithm
{
public:
static vtkReebGraphVolumeSkeletonFilter* New();
vtkTypeMacro(vtkReebGraphVolumeSkeletonFilter, vtkDataObjectAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* Set the number of samples along each arc of the Reeb graph
* Default value: 5
*/
vtkSetMacro(NumberOfSamples, int);
vtkGetMacro(NumberOfSamples, int);
///@}
///@{
/**
* Set the number of optional smoothing iterations
* Default value: 30
*/
vtkSetMacro(NumberOfSmoothingIterations, int);
vtkGetMacro(NumberOfSmoothingIterations, int);
///@}
///@{
/**
* Set the scalar field Id
* Default value: 0
*/
vtkSetMacro(FieldId, vtkIdType);
vtkGetMacro(FieldId, vtkIdType);
///@}
vtkTable* GetOutput();
protected:
vtkReebGraphVolumeSkeletonFilter();
~vtkReebGraphVolumeSkeletonFilter() override;
vtkIdType FieldId;
int NumberOfSamples, NumberOfSmoothingIterations;
int FillInputPortInformation(int portNumber, vtkInformation*) override;
int FillOutputPortInformation(int portNumber, vtkInformation* info) override;
int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
vtkInformationVector* outputVector) override;
private:
vtkReebGraphVolumeSkeletonFilter(const vtkReebGraphVolumeSkeletonFilter&) = delete;
void operator=(const vtkReebGraphVolumeSkeletonFilter&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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