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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    vtkQuadraticPolygon.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 =========================================================================*/
00035 #ifndef vtkQuadraticPolygon_h
00036 #define vtkQuadraticPolygon_h
00037 
00038 #include "vtkCommonDataModelModule.h" // For export macro
00039 #include "vtkNonLinearCell.h"
00040 
00041 class vtkQuadraticEdge;
00042 class vtkPolygon;
00043 class vtkIdTypeArray;
00044 
00045 class VTKCOMMONDATAMODEL_EXPORT vtkQuadraticPolygon : public vtkNonLinearCell
00046 {
00047 public:
00048   static vtkQuadraticPolygon *New();
00049   vtkTypeMacro(vtkQuadraticPolygon, vtkNonLinearCell);
00050   void PrintSelf(ostream& os, vtkIndent indent);
00051 
00053 
00055   int GetCellType() { return VTK_QUADRATIC_POLYGON; }
00056   int GetCellDimension() { return 2;}
00057   int GetNumberOfEdges() { return this->GetNumberOfPoints() / 2; }
00058   int GetNumberOfFaces() { return 0; }
00059   vtkCell *GetEdge(int);
00060   vtkCell *GetFace(int) { return 0; }
00061   int IsPrimaryCell() { return 0; }
00063 
00065 
00069   int CellBoundary(int subId, double pcoords[3], vtkIdList *pts);
00070   void Contour(double value, vtkDataArray *cellScalars,
00071                vtkIncrementalPointLocator *locator, vtkCellArray *verts,
00072                vtkCellArray *lines, vtkCellArray *polys,
00073                vtkPointData *inPd, vtkPointData *outPd,
00074                vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd);
00075   void Clip(double value, vtkDataArray *cellScalars,
00076             vtkIncrementalPointLocator *locator, vtkCellArray *polys,
00077             vtkPointData *inPd, vtkPointData *outPd,
00078             vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd,
00079             int insideOut);
00080   int EvaluatePosition(double x[3], double* closestPoint,
00081                        int& subId, double pcoords[3],
00082                        double& dist2, double *weights);
00083   void EvaluateLocation(int& subId, double pcoords[3], double x[3],
00084                         double *weights);
00085   int IntersectWithLine(double p1[3], double p2[3], double tol, double& t,
00086                         double x[3], double pcoords[3], int& subId);
00087   virtual void InterpolateFunctions(double x[3], double *weights);
00088   static void ComputeCentroid(vtkIdTypeArray *ids, vtkPoints *pts,
00089                               double centroid[3]);
00090   int ParameterizePolygon(double p0[3], double p10[3], double &l10,
00091                           double p20[3], double &l20, double n[3]);
00092   static int PointInPolygon(double x[3], int numPts, double *pts,
00093                             double bounds[6], double n[3]);
00094   int Triangulate(vtkIdList *outTris);
00095   int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts);
00096   int NonDegenerateTriangulate(vtkIdList *outTris);
00097   static double DistanceToPolygon(double x[3], int numPts, double *pts,
00098                                   double bounds[6], double closest[3]);
00099   static int IntersectPolygonWithPolygon(int npts, double *pts, double bounds[6],
00100                                          int npts2, double *pts2,
00101                                          double bounds2[3], double tol,
00102                                          double x[3]);
00103   static int IntersectConvex2DCells(vtkCell *cell1, vtkCell *cell2,
00104                                     double tol, double p0[3], double p1[3]);
00106 
00107   // Not implemented
00108   void Derivatives(int subId, double pcoords[3], double *values,
00109                    int dim, double *derivs);
00110 
00112 
00117   vtkGetMacro(UseMVCInterpolation, bool);
00118   vtkSetMacro(UseMVCInterpolation, bool);
00120 
00121 protected:
00122   vtkQuadraticPolygon();
00123   ~vtkQuadraticPolygon();
00124 
00125   // variables used by instances of this class
00126   vtkPolygon       *Polygon;
00127   vtkQuadraticEdge *Edge;
00128 
00129   // Parameter indicating whether to use Mean Value Coordinate algorithm
00130   // for interpolation. The parameter is true by default.
00131   bool UseMVCInterpolation;
00132 
00134 
00136   static void GetPermutationFromPolygon(vtkIdType nb, vtkIdList *permutation);
00137   static void PermuteToPolygon(vtkIdType nbPoints, double *inPoints, double *outPoints);
00138   static void PermuteToPolygon(vtkCell *inCell, vtkCell *outCell);
00139   static void PermuteToPolygon(vtkPoints *inPoints, vtkPoints *outPoints);
00140   static void PermuteToPolygon(vtkIdTypeArray *inIds, vtkIdTypeArray *outIds);
00141   static void PermuteToPolygon(vtkDataArray *inDataArray, vtkDataArray *outDataArray);
00142   void InitializePolygon();
00144 
00146 
00148   static void GetPermutationToPolygon(vtkIdType nb, vtkIdList *permutation);
00149   static void PermuteFromPolygon(vtkIdType nb, double *values);
00150   static void ConvertFromPolygon(vtkIdList *ids);
00152 
00153 private:
00154   vtkQuadraticPolygon(const vtkQuadraticPolygon&);  // Not implemented.
00155   void operator=(const vtkQuadraticPolygon&);  // Not implemented.
00156 };
00157 
00158 #endif