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# Common/vtkQuadraticTriangle.h

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    00001 /*=========================================================================
    00002
    00003   Program:   Visualization Toolkit
    00004   Module:    $RCSfile: vtkQuadraticTriangle.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 =========================================================================*/
    00049 #ifndef __vtkQuadraticTriangle_h
    00050 #define __vtkQuadraticTriangle_h
    00051
    00052 #include "vtkNonLinearCell.h"
    00053
    00054 class vtkPolyData;
    00055 class vtkQuadraticEdge;
    00056 class vtkTriangle;
    00057
    00058 class VTK_COMMON_EXPORT vtkQuadraticTriangle : public vtkNonLinearCell
    00059 {
    00060 public:
    00061   static vtkQuadraticTriangle *New();
    00062   vtkTypeRevisionMacro(vtkQuadraticTriangle,vtkNonLinearCell);
    00063
    00065
    00067   int GetCellType() {return VTK_QUADRATIC_TRIANGLE;};
    00068   int GetCellDimension() {return 2;}
    00069   int GetNumberOfEdges() {return 3;}
    00070   int GetNumberOfFaces() {return 0;}
    00071   vtkCell *GetEdge(int edgeId);
    00072   vtkCell *GetFace(int) {return 0;}
    00074
    00075   int CellBoundary(int subId, float pcoords[3], vtkIdList *pts);
    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   int EvaluatePosition(float x[3], float* closestPoint,
    00082                        int& subId, float pcoords[3],
    00083                        float& dist2, float *weights);
    00084   void EvaluateLocation(int& subId, float pcoords[3], float x[3],
    00085                         float *weights);
    00086   int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts);
    00087   void Derivatives(int subId, float pcoords[3], float *values,
    00088                    int dim, float *derivs);
    00089
    00091
    00094   void Clip(float value, vtkDataArray *cellScalars,
    00095             vtkPointLocator *locator, vtkCellArray *polys,
    00096             vtkPointData *inPd, vtkPointData *outPd,
    00097             vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd,
    00098             int insideOut);
    00100
    00102
    00104   int IntersectWithLine(float p1[3], float p2[3], float tol, float& t,
    00105                         float x[3], float pcoords[3], int& subId);
    00107
    00108
    00111   int GetParametricCenter(float pcoords[3]);
    00112
    00114
    00115   static void InterpolationFunctions(float pcoords[3], float weights[3]);
    00116   static void InterpolationDerivs(float pcoords[3], float derivs[3]);
    00118
    00119 protected:
    00120   vtkQuadraticTriangle();
    00121   ~vtkQuadraticTriangle();
    00122
    00123   vtkQuadraticEdge *Edge;
    00124   vtkTriangle      *Face;
    00125   vtkFloatArray    *Scalars; //used to avoid New/Delete in contouring/clipping
    00126
    00127 private:
    00128   vtkQuadraticTriangle(const vtkQuadraticTriangle&);  // Not implemented.
    00129   void operator=(const vtkQuadraticTriangle&);  // Not implemented.
    00130 };
    00131
    00132 #endif
    00133
    00134