vtkRectilinearGridToTetrahedra.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkRectilinearGridToTetrahedra_h
#define vtkRectilinearGridToTetrahedra_h
 
// ways to create the mesh from voxels
#define VTK_VOXEL_TO_12_TET 12
#define VTK_VOXEL_TO_5_TET 5
#define VTK_VOXEL_TO_6_TET 6
#define VTK_VOXEL_TO_5_AND_12_TET -1
 
#include "vtkFiltersGeneralModule.h" // For export macro
#include "vtkUnstructuredGridAlgorithm.h"
VTK_ABI_NAMESPACE_BEGIN
class vtkRectilinearGrid;
class vtkSignedCharArray;
class vtkIdList;
class vtkCellArray;
class vtkPoints;
 
class VTKFILTERSGENERAL_EXPORT vtkRectilinearGridToTetrahedra : public vtkUnstructuredGridAlgorithm
{
public:
  vtkTypeMacro(vtkRectilinearGridToTetrahedra, vtkUnstructuredGridAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  static vtkRectilinearGridToTetrahedra* New();
 
 
  void SetTetraPerCellTo5() { SetTetraPerCell(VTK_VOXEL_TO_5_TET); }
  void SetTetraPerCellTo6() { SetTetraPerCell(VTK_VOXEL_TO_6_TET); }
  void SetTetraPerCellTo12() { SetTetraPerCell(VTK_VOXEL_TO_12_TET); }
  void SetTetraPerCellTo5And12() { SetTetraPerCell(VTK_VOXEL_TO_5_AND_12_TET); }
  vtkSetMacro(TetraPerCell, int);
  vtkGetMacro(TetraPerCell, int);
 
 
  vtkSetMacro(RememberVoxelId, vtkTypeBool);
  vtkGetMacro(RememberVoxelId, vtkTypeBool);
  vtkBooleanMacro(RememberVoxelId, vtkTypeBool);
 
  void SetInput(const double Extent[3], const double Spacing[3], double tol = 0.001);
  void SetInput(double ExtentX, double ExtentY, double ExtentZ, double SpacingX, double SpacingY,
    double SpacingZ, double tol = 0.001);
 
protected:
  vtkRectilinearGridToTetrahedra();
  ~vtkRectilinearGridToTetrahedra() override = default;
 
  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
 
  vtkTypeBool RememberVoxelId;
  int TetraPerCell;
 
  int FillInputPortInformation(int, vtkInformation*) override;
 
private:
  vtkRectilinearGridToTetrahedra(const vtkRectilinearGridToTetrahedra&) = delete;
 
  void operator=(const vtkRectilinearGridToTetrahedra&) = delete;
 
  static void DetermineGridDivisionTypes(vtkRectilinearGrid* RectGrid,
    vtkSignedCharArray* VoxelSubdivisionType, const int& TetraPerCell);
 
  static void GridToTetMesh(vtkRectilinearGrid* RectGrid, vtkSignedCharArray* VoxelSubdivisionType,
    const int& TetraPerCell, const int& RememberVoxelId, vtkUnstructuredGrid* TetMesh,
    vtkRectilinearGridToTetrahedra* self);
 
  static int TetrahedralizeVoxel(
    vtkIdList* VoxelCorners, const int& DivisionType, vtkPoints* NodeList, vtkCellArray* TetList);
 
  static void TetrahedralizeAddCenterPoint(vtkIdList* VoxelCorners, vtkPoints* NodeList);
};
 
VTK_ABI_NAMESPACE_END
#endif /* vtkRectilinearGridToTetrahedra_h */