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# Common/vtkTetra.h

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    00001 /*=========================================================================
    00002
    00003   Program:   Visualization Toolkit
    00004   Module:    $RCSfile: vtkTetra.h,v $
    00005   Language:  C++
    00006
    00007   Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen
    00008   All rights reserved.
    00009   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
    00010
    00011      This software is distributed WITHOUT ANY WARRANTY; without even
    00012      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    00013      PURPOSE.  See the above copyright notice for more information.
    00014
    00015 =========================================================================*/
    00047 #ifndef __vtkTetra_h
    00048 #define __vtkTetra_h
    00049
    00050 #include "vtkCell3D.h"
    00051
    00052 class vtkLine;
    00053 class vtkTriangle;
    00054 class vtkUnstructuredGrid;
    00055
    00056 class VTK_COMMON_EXPORT vtkTetra : public vtkCell3D
    00057 {
    00058 public:
    00059   static vtkTetra *New();
    00060   vtkTypeRevisionMacro(vtkTetra,vtkCell3D);
    00061
    00063
    00064   virtual void GetEdgePoints(int edgeId, int* &pts);
    00065   virtual void GetFacePoints(int faceId, int* &pts);
    00066   virtual float *GetParametricCoords();
    00068
    00070
    00071   int GetCellType() {return VTK_TETRA;}
    00072   int GetNumberOfEdges() {return 6;}
    00073   int GetNumberOfFaces() {return 4;}
    00074   vtkCell *GetEdge(int edgeId);
    00075   vtkCell *GetFace(int faceId);
    00076   void Contour(float value, vtkDataArray *cellScalars,
    00077                vtkPointLocator *locator, vtkCellArray *verts,
    00078                vtkCellArray *lines, vtkCellArray *polys,
    00079                vtkPointData *inPd, vtkPointData *outPd,
    00080                vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd);
    00081   void Clip(float value, vtkDataArray *cellScalars,
    00082             vtkPointLocator *locator, vtkCellArray *connectivity,
    00083             vtkPointData *inPd, vtkPointData *outPd,
    00084             vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd,
    00085             int insideOut);
    00086   int EvaluatePosition(float x[3], float* closestPoint,
    00087                        int& subId, float pcoords[3],
    00088                        float& dist2, float *weights);
    00089   void EvaluateLocation(int& subId, float pcoords[3], float x[3],
    00090                         float *weights);
    00091   int IntersectWithLine(float p1[3], float p2[3], float tol, float& t,
    00092                         float x[3], float pcoords[3], int& subId);
    00093   int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts);
    00094   void Derivatives(int subId, float pcoords[3], float *values,
    00095                    int dim, float *derivs);
    00097
    00101   int CellBoundary(int subId, float pcoords[3], vtkIdList *pts);
    00102
    00104   int GetParametricCenter(float pcoords[3]);
    00105
    00107
    00108   static void TetraCenter(float p1[3], float p2[3], float p3[3], float p4[3],
    00109                           float center[3]);
    00111
    00113
    00115   static double Circumsphere(double  p1[3], double p2[3], double p3[3],
    00116                              double p4[3], double center[3]);
    00118
    00120
    00123   static double Insphere(double  p1[3], double p2[3], double p3[3],
    00124                          double p4[3], double center[3]);
    00126
    00128
    00139   static int BarycentricCoords(double x[3], double  x1[3], double x2[3],
    00140                                double x3[3], double x4[3], double bcoords[4]);
    00142
    00144
    00146   static double ComputeVolume(double  p1[3], double p2[3], double p3[3],
    00147                               double p4[3]);
    00149
    00153   int JacobianInverse(double **inverse, float derivs[12]);
    00154
    00156
    00157   static void InterpolationFunctions(float pcoords[3], float weights[4]);
    00158   static void InterpolationDerivs(float derivs[12]);
    00159   static int *GetEdgeArray(int edgeId);
    00160   static int *GetFaceArray(int faceId);
    00162
    00163 protected:
    00164   vtkTetra();
    00165   ~vtkTetra();
    00166
    00167   vtkLine *Line;
    00168   vtkTriangle *Triangle;
    00169
    00170 private:
    00171   vtkTetra(const vtkTetra&);  // Not implemented.
    00172   void operator=(const vtkTetra&);  // Not implemented.
    00173 };
    00174
    00175 inline int vtkTetra::GetParametricCenter(float pcoords[3])
    00176 {
    00177   pcoords[0] = pcoords[1] = pcoords[2] = 0.25;
    00178   return 0;
    00179 }
    00180
    00181 #endif
    00182
    00183
    00184