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dox/Common/vtkPolygon.h

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00001 /*========================================================================= 00002 00003 Program: Visualization Toolkit 00004 Module: $RCSfile: vtkPolygon.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 =========================================================================*/ 00034 #ifndef __vtkPolygon_h 00035 #define __vtkPolygon_h 00036 00037 #include "vtkCell.h" 00038 00039 class vtkFloatArray; 00040 class vtkLine; 00041 class vtkPoints; 00042 class vtkQuad; 00043 class vtkTriangle; 00044 00045 class VTK_COMMON_EXPORT vtkPolygon : public vtkCell 00046 { 00047 public: 00048 static vtkPolygon *New(); 00049 vtkTypeRevisionMacro(vtkPolygon,vtkCell); 00050 00052 00053 int GetCellType() {return VTK_POLYGON;}; 00054 int GetCellDimension() {return 2;}; 00055 int GetNumberOfEdges() {return this->GetNumberOfPoints();}; 00056 int GetNumberOfFaces() {return 0;}; 00057 vtkCell *GetEdge(int edgeId); 00058 vtkCell *GetFace(int) {return 0;}; 00059 int CellBoundary(int subId, float pcoords[3], vtkIdList *pts); 00060 void Contour(float value, vtkDataArray *cellScalars, 00061 vtkPointLocator *locator,vtkCellArray *verts, 00062 vtkCellArray *lines, vtkCellArray *polys, 00063 vtkPointData *inPd, vtkPointData *outPd, 00064 vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd); 00065 void Clip(float value, vtkDataArray *cellScalars, 00066 vtkPointLocator *locator, vtkCellArray *tris, 00067 vtkPointData *inPd, vtkPointData *outPd, 00068 vtkCellData *inCd, vtkIdType cellId, vtkCellData *outCd, 00069 int insideOut); 00070 int EvaluatePosition(float x[3], float* closestPoint, 00071 int& subId, float pcoords[3], 00072 float& dist2, float *weights); 00073 void EvaluateLocation(int& subId, float pcoords[3], float x[3], 00074 float *weights); 00075 int IntersectWithLine(float p1[3], float p2[3], float tol, float& t, 00076 float x[3], float pcoords[3], int& subId); 00077 int Triangulate(int index, vtkIdList *ptIds, vtkPoints *pts); 00078 void Derivatives(int subId, float pcoords[3], float *values, 00079 int dim, float *derivs); 00081 00083 00084 static void ComputeNormal(vtkPoints *p, int numPts, vtkIdType *pts, 00085 float n[3]); 00086 static void ComputeNormal(vtkPoints *p, float n[3]); 00088 00092 static void ComputeNormal(int numPts, float *pts, float n[3]); 00093 00095 void ComputeWeights(float x[3], float *weights); 00096 00097 00099 00104 int ParameterizePolygon(float p0[3], float p10[3], float &l10, 00105 float p20[3], float &l20, float n[3]); 00107 00109 00113 static int PointInPolygon(float x[3], int numPts, float *pts, 00114 float bounds[6], float n[3]); 00116 00121 int Triangulate(vtkIdList *outTris); 00122 00124 00130 static int IntersectPolygonWithPolygon(int npts, float *pts, float bounds[6], 00131 int npts2, float *pts2, 00132 float bounds2[3], float tol, 00133 float x[3]); 00135 00136 protected: 00137 vtkPolygon(); 00138 ~vtkPolygon(); 00139 00140 // variables used by instances of this class 00141 float Tolerance; // Intersection tolerance 00142 int SuccessfulTriangulation; // Stops recursive tri. if necessary 00143 float Normal[3]; //polygon normal 00144 vtkIdList *Tris; 00145 vtkTriangle *Triangle; 00146 vtkQuad *Quad; 00147 vtkFloatArray *TriScalars; 00148 vtkLine *Line; 00149 00150 // Helper methods for triangulation------------------------------ 00155 int EarCutTriangulation(); 00156 00157 private: 00158 vtkPolygon(const vtkPolygon&); // Not implemented. 00159 void operator=(const vtkPolygon&); // Not implemented. 00160 }; 00161 00162 #endif 00163