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vtkPyramid.h
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vtkPyramid.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPyramid.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 vtkPyramid
* @brief a 3D cell that represents a linear pyramid
*
* vtkPyramid is a concrete implementation of vtkCell to represent a 3D
* pyramid. A pyramid consists of a rectangular base with four triangular
* faces. vtkPyramid uses the standard isoparametric shape functions for
* a linear pyramid. The pyramid is defined by the five points (0-4) where
* (0,1,2,3) is the base of the pyramid which, using the right hand rule,
* forms a quadrilaterial whose normal points in the direction of the
* pyramid apex at vertex #4. The parametric location of vertex #4 is [0, 0, 1].
*
* @sa
* vtkConvexPointSet vtkHexahedron vtkTetra vtkVoxel vtkWedge
*/
#ifndef vtkPyramid_h
#define vtkPyramid_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkCell3D.h"
class vtkLine;
class vtkQuad;
class vtkTriangle;
class vtkUnstructuredGrid;
class vtkIncrementalPointLocator;
class VTKCOMMONDATAMODEL_EXPORT vtkPyramid : public vtkCell3D
{
public:
static vtkPyramid *New();
vtkTypeMacro(vtkPyramid,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;
//@}
//@{
/**
* See the vtkCell API for descriptions of these methods.
*/
int GetCellType() override {return VTK_PYRAMID;}
int GetCellDimension() override {return 3;}
int GetNumberOfEdges() override {return 8;}
int GetNumberOfFaces() override {return 5;}
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;
double *GetParametricCoords() override;
//@}
/**
* 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 center of the pyramid in parametric coordinates.
*/
int GetParametricCenter(double pcoords[3]) override;
/**
* @deprecated Replaced by vtkPyramid::InterpolateFunctions as of VTK 5.2
*/
static void InterpolationFunctions(const double pcoords[3], double weights[5]);
/**
* @deprecated Replaced by vtkPyramid::InterpolateDerivs as of VTK 5.2
*/
static void InterpolationDerivs(const double pcoords[3], double derivs[15]);
//@{
/**
* Compute the interpolation functions/derivatives
* (aka shape functions/derivatives)
*/
void InterpolateFunctions(const double pcoords[3], double weights[5]) override
{
vtkPyramid::InterpolationFunctions(pcoords,weights);
}
void InterpolateDerivs(const double pcoords[3], double derivs[15]) override
{
vtkPyramid::InterpolationDerivs(pcoords,derivs);
}
//@}
int JacobianInverse(const double pcoords[3], double **inverse, double derivs[15]);
//@{
/**
* 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:
vtkPyramid();
~vtkPyramid() override;
vtkLine *Line;
vtkTriangle *Triangle;
vtkQuad *Quad;
private:
vtkPyramid(const vtkPyramid&) = delete;
void operator=(const vtkPyramid&) = delete;
};
//----------------------------------------------------------------------------
inline int vtkPyramid::GetParametricCenter(double pcoords[3])
{
pcoords[0] = pcoords[1] = 0.4;
pcoords[2] = 0.2;
return 0;
}
#endif