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113 lines
4.0 KiB
113 lines
4.0 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkPyramid.h,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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// .NAME vtkPyramid - a 3D cell that represents a linear pyramid
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// .SECTION Description
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// vtkPyramid is a concrete implementation of vtkCell to represent a 3D
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// pyramid. A pyramid consists of a rectangular base with four triangular
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// faces. vtkPyramid uses the standard isoparametric shape functions for
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// a linear pyramid. The pyramid is defined by the five points (0-4) where
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// (0,1,2,3) is the base of the pyramid which, using the right hand rule,
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// forms a quadrilaterial whose normal points in the direction of the
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// pyramid apex at vertex #4.
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// .SECTION See Also
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// vtkConvexPointSet vtkHexahedron vtkTetra vtkVoxel vtkWedge
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#ifndef __vtkPyramid_h
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#define __vtkPyramid_h
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#include "vtkCell3D.h"
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class vtkLine;
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class vtkQuad;
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class vtkTriangle;
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class vtkUnstructuredGrid;
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class VTK_FILTERING_EXPORT vtkPyramid : public vtkCell3D
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{
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public:
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static vtkPyramid *New();
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vtkTypeRevisionMacro(vtkPyramid,vtkCell3D);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// See vtkCell3D API for description of these methods.
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virtual void GetEdgePoints(int edgeId, int* &pts);
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virtual void GetFacePoints(int faceId, int* &pts);
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// Description:
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// See the vtkCell API for descriptions of these methods.
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int GetCellType() {return VTK_PYRAMID;}
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int GetCellDimension() {return 3;}
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int GetNumberOfEdges() {return 8;}
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int GetNumberOfFaces() {return 5;}
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vtkCell *GetEdge(int edgeId);
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vtkCell *GetFace(int faceId);
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int CellBoundary(int subId, double pcoords[3], vtkIdList *pts);
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void Contour(double value, vtkDataArray *cellScalars,
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vtkPointLocator *locator, vtkCellArray *verts,
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vtkCellArray *lines, vtkCellArray *polys,
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vtkPointData *inPd, vtkPointData *outPd,
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vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd);
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int EvaluatePosition(double x[3], double* closestPoint,
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int& subId, double pcoords[3],
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double& dist2, double *weights);
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void EvaluateLocation(int& subId, double pcoords[3], double x[3],
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double *weights);
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int IntersectWithLine(double p1[3], double p2[3], double tol, double& t,
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double x[3], double pcoords[3], int& subId);
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int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts);
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void Derivatives(int subId, double pcoords[3], double *values,
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int dim, double *derivs);
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virtual double *GetParametricCoords();
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// Description:
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// Return the center of the pyramid in parametric coordinates.
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int GetParametricCenter(double pcoords[3]);
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// Description:
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// Pyramid specific methods for computing interpolation functions and
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// derivatives.
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static void InterpolationFunctions(double pcoords[3], double weights[5]);
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static void InterpolationDerivs(double pcoords[3], double derivs[15]);
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int JacobianInverse(double pcoords[3], double **inverse, double derivs[15]);
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static int *GetEdgeArray(int edgeId);
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static int *GetFaceArray(int faceId);
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protected:
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vtkPyramid();
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~vtkPyramid();
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vtkLine *Line;
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vtkTriangle *Triangle;
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vtkQuad *Quad;
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private:
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vtkPyramid(const vtkPyramid&); // Not implemented.
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void operator=(const vtkPyramid&); // Not implemented.
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};
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//----------------------------------------------------------------------------
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inline int vtkPyramid::GetParametricCenter(double pcoords[3])
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{
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pcoords[0] = pcoords[1] = 0.4;
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pcoords[2] = 0.2;
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return 0;
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}
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#endif
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