MeshVizXLM/extractors/MxTriangleCellExtract.h

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/*=======================================================================
** Author      : VSG (MMM YYYY)
**=======================================================================*/
#ifndef  _MxTriangleCellExtract_h
#define  _MxTriangleCellExtract_h

#include <MeshVizXLM/mesh/geometry/MiGeometryI.h>

#include <Inventor/STL/vector>
#include <Inventor/STL/utility>

class MiSurfaceCell;

class MESHIVIZ_API MxTriangleCellExtract 
{
public:

  static MbVec3d getIsoParametricCoord(const MiGeometryI& meshGeometry, const MiSurfaceCell* triangleCell, const MbVec3d &point);
  
  static MbVec3d getIsoParametricCoord(size_t nodeIndex);

  static void getWeight(const MiGeometryI& meshGeometry, const MiSurfaceCell* triangleCell, const MbVec3d &point, std::vector<double>& weights)
  {
    getWeight(getIsoParametricCoord(meshGeometry,triangleCell,point),weights);
  }

  static void getWeight(const MbVec3d &ipcoord, std::vector<double>& weights)
  {
    weights[1] = ipcoord[0];
    weights[2] = ipcoord[1];
    weights[0] = 1.0 - weights[1] - weights[2];
  }

  static bool isPointInsideCell(const MiGeometryI& meshGeometry, const MiSurfaceCell* triangleCell, const MbVec3d &point, std::vector<double>& weights)
  {
    getWeight(getIsoParametricCoord(meshGeometry,triangleCell,point),weights);
    return ( -1.E-5 < weights[0] &&  weights[0] < 1 + 1.E-5 &&
             -1.E-5 < weights[1] &&  weights[1] < 1 + 1.E-5 &&
             -1.E-5 < weights[2] &&  weights[2] < 1 + 1.E-5);
  }

  static double getLongestEdgeLength(const MiGeometryI& meshGeometry, const MiSurfaceCell* cell);

  static double getShortestEdgeLength(const MiGeometryI& meshGeometry, const MiSurfaceCell* cell);

private:

  static double s_nodesIsoParametricCoords[3][3];
};

#endif 

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