VTK
dox/Filtering/vtkQuad.h
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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    vtkQuad.h
00005 
00006   Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
00007   All rights reserved.
00008   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
00009 
00010      This software is distributed WITHOUT ANY WARRANTY; without even
00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
00012      PURPOSE.  See the above copyright notice for more information.
00013 
00014 =========================================================================*/
00030 #ifndef __vtkQuad_h
00031 #define __vtkQuad_h
00032 
00033 #include "vtkCell.h"
00034 
00035 class vtkLine;
00036 class vtkTriangle;
00037 class vtkIncrementalPointLocator;
00038 
00039 class VTK_FILTERING_EXPORT vtkQuad : public vtkCell
00040 {
00041 public:
00042   static vtkQuad *New();
00043   vtkTypeMacro(vtkQuad,vtkCell);
00044   void PrintSelf(ostream& os, vtkIndent indent);
00045 
00047 
00048   int GetCellType() {return VTK_QUAD;};
00049   int GetCellDimension() {return 2;};
00050   int GetNumberOfEdges() {return 4;};
00051   int GetNumberOfFaces() {return 0;};
00052   vtkCell *GetEdge(int edgeId);
00053   vtkCell *GetFace(int) {return 0;};
00054   int CellBoundary(int subId, double pcoords[3], vtkIdList *pts);
00055   void Contour(double value, vtkDataArray *cellScalars,
00056                vtkIncrementalPointLocator *locator, vtkCellArray *verts,
00057                vtkCellArray *lines, vtkCellArray *polys,
00058                vtkPointData *inPd, vtkPointData *outPd,
00059                vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd);
00060   int EvaluatePosition(double x[3], double* closestPoint,
00061                        int& subId, double pcoords[3],
00062                        double& dist2, double *weights);
00063   void EvaluateLocation(int& subId, double pcoords[3], double x[3],
00064                         double *weights);
00065   int IntersectWithLine(double p1[3], double p2[3], double tol, double& t,
00066                         double x[3], double pcoords[3], int& subId);
00067   int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts);
00068   void Derivatives(int subId, double pcoords[3], double *values,
00069                    int dim, double *derivs);
00070   virtual double *GetParametricCoords();
00072 
00074   int GetParametricCenter(double pcoords[3]);
00075 
00077 
00079   void Clip(double value, vtkDataArray *cellScalars,
00080             vtkIncrementalPointLocator *locator, vtkCellArray *polys,
00081             vtkPointData *inPd, vtkPointData *outPd,
00082             vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd,
00083             int insideOut);
00085 
00087 
00088   static void InterpolationFunctions(double pcoords[3], double sf[4]);
00089   // Description:
00090   // @deprecated Replaced by vtkQuad::InterpolateDerivs as of VTK 5.2
00091   static void InterpolationDerivs(double pcoords[3], double derivs[8]);
00092   // Description:
00093   // Compute the interpolation functions/derivatives
00094   // (aka shape functions/derivatives)
00095   virtual void InterpolateFunctions(double pcoords[3], double sf[4])
00096     {
00097     vtkQuad::InterpolationFunctions(pcoords,sf);
00098     }
00099   virtual void InterpolateDerivs(double pcoords[3], double derivs[8])
00100     {
00101     vtkQuad::InterpolationDerivs(pcoords,derivs);
00102     }
00104 
00107   int *GetEdgeArray(int edgeId);
00108 
00109 protected:
00110   vtkQuad();
00111   ~vtkQuad();
00112 
00113   vtkLine     *Line;
00114   vtkTriangle *Triangle;
00115 
00116 private:
00117   vtkQuad(const vtkQuad&);  // Not implemented.
00118   void operator=(const vtkQuad&);  // Not implemented.
00119 };
00120 //----------------------------------------------------------------------------
00121 inline int vtkQuad::GetParametricCenter(double pcoords[3])
00122 {
00123   pcoords[0] = pcoords[1] = 0.5;
00124   pcoords[2] = 0.0;
00125   return 0;
00126 }
00127 
00128 
00129 #endif
00130 
00131