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vtkVoxel.h
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vtkVoxel.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkVoxel.h
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.
=========================================================================*/
/**
* @class vtkVoxel
* @brief a cell that represents a 3D orthogonal parallelepiped
*
* vtkVoxel is a concrete implementation of vtkCell to represent a 3D
* orthogonal parallelepiped. Unlike vtkHexahedron, vtkVoxel has interior
* angles of 90 degrees, and sides are parallel to coordinate axes. This
* results in large increases in computational performance.
*
* @sa
* vtkConvexPointSet vtkHexahedron vtkPyramid vtkTetra vtkWedge
*/
#ifndef vtkVoxel_h
#define vtkVoxel_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkCell3D.h"
class vtkLine;
class vtkPixel;
class vtkIncrementalPointLocator;
class VTKCOMMONDATAMODEL_EXPORT vtkVoxel : public vtkCell3D
{
public:
static vtkVoxel *New();
vtkTypeMacro(vtkVoxel,vtkCell3D);
void PrintSelf(ostream& os, vtkIndent indent) override;
//@{
/**
* See vtkCell3D API for description of these methods.
*/
void GetEdgePoints(int edgeId, int* &pts) override;
void GetFacePoints(int faceId, int* &pts) override;
double *GetParametricCoords() override;
//@}
//@{
/**
* See the vtkCell API for descriptions of these methods.
*/
int GetCellType() override {return VTK_VOXEL;}
int GetCellDimension() override {return 3;}
int GetNumberOfEdges() override {return 12;}
int GetNumberOfFaces() override {return 6;}
vtkCell *GetEdge(int edgeId) override;
vtkCell *GetFace(int faceId) override;
int CellBoundary(int subId, const double pcoords[3], vtkIdList *pts) override;
void Contour(double value, vtkDataArray *cellScalars,
vtkIncrementalPointLocator *locator, vtkCellArray *verts,
vtkCellArray *lines, vtkCellArray *polys,
vtkPointData *inPd, vtkPointData *outPd,
vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd) override;
int EvaluatePosition(const double x[3], double closestPoint[3],
int& subId, double pcoords[3],
double& dist2, double weights[]) override;
void EvaluateLocation(int& subId, const double pcoords[3], double x[3],
double *weights) override;
int IntersectWithLine(const double p1[3], const double p2[3], double tol, double& t,
double x[3], double pcoords[3], int& subId) override;
int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts) override;
void Derivatives(int subId, const double pcoords[3], const double *values,
int dim, double *derivs) override;
//@}
/**
* @deprecated Replaced by vtkVoxel::InterpolateDerivs as of VTK 5.2
*/
static void InterpolationDerivs(const double pcoords[3], double derivs[24]);
//@{
/**
* Compute the interpolation functions/derivatives
* (aka shape functions/derivatives)
*/
void InterpolateFunctions(const double pcoords[3], double weights[8]) override
{
vtkVoxel::InterpolationFunctions(pcoords,weights);
}
void InterpolateDerivs(const double pcoords[3], double derivs[24]) override
{
vtkVoxel::InterpolationDerivs(pcoords,derivs);
}
//@}
/**
* Compute the interpolation functions.
* This static method is for convenience. Use the member function
* if you already have an instance of a voxel.
*/
static void InterpolationFunctions(const double pcoords[3], double weights[8]);
/**
* Return the case table for table-based isocontouring (aka marching cubes
* style implementations). A linear 3D cell with N vertices will have 2**N
* cases. The returned case array lists three edges in order to produce one
* output triangle which may be repeated to generate multiple triangles. The
* list of cases terminates with a -1 entry.
*/
static int* GetTriangleCases(int caseId);
//@{
/**
* Return the ids of the vertices defining edge/face (`edgeId`/`faceId').
* Ids are related to the cell, not to the dataset.
*/
static int *GetEdgeArray(int edgeId) VTK_SIZEHINT(2);
static int *GetFaceArray(int faceId) VTK_SIZEHINT(4);
//@}
protected:
vtkVoxel();
~vtkVoxel() override;
private:
vtkVoxel(const vtkVoxel&) = delete;
void operator=(const vtkVoxel&) = delete;
vtkLine *Line;
vtkPixel *Pixel;
};
#endif