VTK
dox/Filtering/vtkBiQuadraticTriangle.h
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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    vtkBiQuadraticTriangle.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 =========================================================================*/
00040 #ifndef __vtkBiQuadraticTriangle_h
00041 #define __vtkBiQuadraticTriangle_h
00042 
00043 #include "vtkNonLinearCell.h"
00044 
00045 class vtkQuadraticEdge;
00046 class vtkTriangle;
00047 class vtkDoubleArray;
00048 
00049 class VTK_FILTERING_EXPORT vtkBiQuadraticTriangle : public vtkNonLinearCell
00050 {
00051 public:
00052   static vtkBiQuadraticTriangle *New();
00053   vtkTypeMacro(vtkBiQuadraticTriangle,vtkNonLinearCell);
00054   void PrintSelf(ostream& os, vtkIndent indent);
00055 
00057 
00059   int GetCellType() {return VTK_BIQUADRATIC_TRIANGLE;};
00060   int GetCellDimension() {return 2;}
00061   int GetNumberOfEdges() {return 3;}
00062   int GetNumberOfFaces() {return 0;}
00063   vtkCell *GetEdge(int edgeId);
00064   vtkCell *GetFace(int) {return 0;}
00066 
00067   int CellBoundary(int subId, double pcoords[3], vtkIdList *pts);
00068   void Contour(double value, vtkDataArray *cellScalars,
00069                vtkIncrementalPointLocator *locator, vtkCellArray *verts,
00070                vtkCellArray *lines, vtkCellArray *polys,
00071                vtkPointData *inPd, vtkPointData *outPd,
00072                vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd);
00073   int EvaluatePosition(double x[3], double* closestPoint,
00074                        int& subId, double pcoords[3],
00075                        double& dist2, double *weights);
00076   void EvaluateLocation(int& subId, double pcoords[3], double x[3],
00077                         double *weights);
00078   int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts);
00079   void Derivatives(int subId, double pcoords[3], double *values,
00080                    int dim, double *derivs);
00081   virtual double *GetParametricCoords();
00082 
00084 
00087   void Clip(double value, vtkDataArray *cellScalars,
00088             vtkIncrementalPointLocator *locator, vtkCellArray *polys,
00089             vtkPointData *inPd, vtkPointData *outPd,
00090             vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd,
00091             int insideOut);
00093 
00095 
00097   int IntersectWithLine(double p1[3], double p2[3], double tol, double& t,
00098                         double x[3], double pcoords[3], int& subId);
00100 
00101 
00104   int GetParametricCenter(double pcoords[3]);
00105 
00108   double GetParametricDistance(double pcoords[3]);
00109 
00111 
00113   static void InterpolationFunctions(double pcoords[3], double weights[7]);
00114   // Description:
00115   // @deprecated Replaced by vtkBiQuadraticTriangle::InterpolateDerivs as of VTK 5.2
00116   static void InterpolationDerivs(double pcoords[3], double derivs[14]);
00117   // Description:
00118   // Compute the interpolation functions/derivatives
00119   // (aka shape functions/derivatives)
00120   virtual void InterpolateFunctions(double pcoords[3], double weights[7])
00121     {
00122     vtkBiQuadraticTriangle::InterpolationFunctions(pcoords,weights);
00123     }
00124   virtual void InterpolateDerivs(double pcoords[3], double derivs[14])
00125     {
00126     vtkBiQuadraticTriangle::InterpolationDerivs(pcoords,derivs);
00127     }
00129 
00130 protected:
00131   vtkBiQuadraticTriangle();
00132   ~vtkBiQuadraticTriangle();
00133 
00134   vtkQuadraticEdge *Edge;
00135   vtkTriangle      *Face;
00136   vtkDoubleArray   *Scalars; //used to avoid New/Delete in contouring/clipping
00137 
00138 private:
00139   vtkBiQuadraticTriangle(const vtkBiQuadraticTriangle&);  // Not implemented.
00140   void operator=(const vtkBiQuadraticTriangle&);  // Not implemented.
00141 };
00142 //----------------------------------------------------------------------------
00143 inline int vtkBiQuadraticTriangle::GetParametricCenter(double pcoords[3])
00144 {
00145   pcoords[0] = pcoords[1] = 1./3;
00146   pcoords[2] = 0.0;
00147   return 0;
00148 }
00149 
00150 
00151 #endif
00152 
00153