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dox/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 =========================================================================*/
00036 #ifndef __vtkTetra_h
00037 #define __vtkTetra_h
00038 
00039 #include "vtkCell3D.h"
00040 
00041 class vtkLine;
00042 class vtkTriangle;
00043 class vtkUnstructuredGrid;
00044 
00045 class VTK_COMMON_EXPORT vtkTetra : public vtkCell3D
00046 {
00047 public:
00048   static vtkTetra *New();
00049   vtkTypeRevisionMacro(vtkTetra,vtkCell3D);
00050 
00052 
00053   virtual void GetEdgePoints(int edgeId, int* &pts);
00054   virtual void GetFacePoints(int faceId, int* &pts);
00055   virtual float *GetParametricCoords();
00057 
00059 
00060   int GetCellType() {return VTK_TETRA;}
00061   int GetNumberOfEdges() {return 6;}
00062   int GetNumberOfFaces() {return 4;}
00063   vtkCell *GetEdge(int edgeId);
00064   vtkCell *GetFace(int faceId);
00065   void Contour(float value, vtkDataArray *cellScalars, 
00066                vtkPointLocator *locator, vtkCellArray *verts, 
00067                vtkCellArray *lines, vtkCellArray *polys,
00068                vtkPointData *inPd, vtkPointData *outPd,
00069                vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd);
00070   void Clip(float value, vtkDataArray *cellScalars, 
00071             vtkPointLocator *locator, vtkCellArray *connectivity,
00072             vtkPointData *inPd, vtkPointData *outPd,
00073             vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd, 
00074             int insideOut);
00075   int EvaluatePosition(float x[3], float* closestPoint,
00076                        int& subId, float pcoords[3],
00077                        float& dist2, float *weights);
00078   void EvaluateLocation(int& subId, float pcoords[3], float x[3],
00079                         float *weights);
00080   int IntersectWithLine(float p1[3], float p2[3], float tol, float& t,
00081                         float x[3], float pcoords[3], int& subId);
00082   int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts);
00083   void Derivatives(int subId, float pcoords[3], float *values, 
00084                    int dim, float *derivs);
00086 
00090   int CellBoundary(int subId, float pcoords[3], vtkIdList *pts);
00091   
00093   int GetParametricCenter(float pcoords[3]);
00094 
00096 
00097   static void TetraCenter(float p1[3], float p2[3], float p3[3], float p4[3], 
00098                           float center[3]);
00100 
00102 
00104   static double Circumsphere(double  p1[3], double p2[3], double p3[3], 
00105                              double p4[3], double center[3]);
00107 
00109 
00112   static double Insphere(double  p1[3], double p2[3], double p3[3], 
00113                          double p4[3], double center[3]);
00115 
00117 
00128   static int BarycentricCoords(double x[3], double  x1[3], double x2[3], 
00129                                double x3[3], double x4[3], double bcoords[4]);
00131   
00133 
00135   static double ComputeVolume(double  p1[3], double p2[3], double p3[3], 
00136                               double p4[3]);
00138 
00142   int JacobianInverse(double **inverse, float derivs[12]);
00143 
00145 
00146   static void InterpolationFunctions(float pcoords[3], float weights[4]);
00147   static void InterpolationDerivs(float derivs[12]);
00148   static int *GetEdgeArray(int edgeId);
00149   static int *GetFaceArray(int faceId);
00151 
00152 protected:
00153   vtkTetra();
00154   ~vtkTetra();
00155 
00156   vtkLine *Line;
00157   vtkTriangle *Triangle;
00158 
00159 private:
00160   vtkTetra(const vtkTetra&);  // Not implemented.
00161   void operator=(const vtkTetra&);  // Not implemented.
00162 };
00163 
00164 inline int vtkTetra::GetParametricCenter(float pcoords[3])
00165 {
00166   pcoords[0] = pcoords[1] = pcoords[2] = 0.25;
00167   return 0;
00168 }
00169 
00170 #endif
00171 
00172 
00173