MeshVizXLM/mesh/cell/MiVolumeCell.h

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

#ifdef _WIN32
#  pragma warning( push )
#  pragma warning(disable:4250)
#endif

#include <MeshVizXLM/mesh/cell/MiCell.h>
#include <MeshVizXLM/mesh/data/MiDataSet.h>

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

class MESHVIZXLM_EXTR_API MiVolumeCell : public MiCell
{
public:

  virtual size_t getNumFacets() const = 0; 

  virtual size_t appendNodesIndexOfFacet (size_t facet, std::vector<size_t>& facetNodes) const = 0;

  virtual size_t getSubTriangleNodesIndex(size_t SO_UNUSED_PARAM(facet), std::vector<size_t>& SO_UNUSED_PARAM(triangleNodeIds)) const 
  {
    return 0;
  }

  virtual size_t getSubTetrahedronNodesIndex (std::vector<size_t>& SO_UNUSED_PARAM(tetrahedronNodeIds)) const 
  {
    return 0;
  }

  virtual size_t appendLocalNodesIndexOfFacet (size_t SO_UNUSED_PARAM(facet), std::vector<size_t>& SO_UNUSED_PARAM(facetNodes)) const
  {
    throw MiAbstractMethodError("MiVolumeCell::appendLocalNodesIndexOfFacet(size_t facet, std::vector<size_t>& facetNodes)");
  }

  virtual void getIsosurfTopology(unsigned char caseId, std::vector< std::pair<size_t,size_t> >& edgeList ) const = 0;

  virtual unsigned char getMarchingCaseId(std::vector<bool> &nodesSign, size_t beginNodeId=0) const;

  virtual MbVec3d getFacetCenter(size_t SO_UNUSED_PARAM(facet), const MiGeometryI& SO_UNUSED_PARAM(geometry)) const;

private: protected:
  virtual std::ostream& toStream(std::ostream& s) const;

};

//-----------------------------------------------------------------------------
inline unsigned char 
MiVolumeCell::getMarchingCaseId(std::vector<bool> &nodesSign, size_t beginNodeId) const
{
  unsigned char caseId = 0;
  unsigned char maxId = 0;
  size_t i;
  for (i=0; i<getNumNodes(); ++i)
  {
    if (nodesSign[getNodeIndex(i)-beginNodeId]) caseId |= (1<<i);
    maxId |= (1<<i);
  }
  if (caseId == maxId) 
    caseId = 0;
  return caseId;
}

//-----------------------------------------------------------------------------
inline MbVec3d
MiVolumeCell::getFacetCenter(size_t facet, const MiGeometryI& geometry) const
{
  std::vector<size_t> facetNodes;
  MbVec3d facetCenter(0);
  size_t numFacetNodes = this->appendNodesIndexOfFacet(facet,facetNodes);
  for ( size_t n = 0; n < numFacetNodes; ++n) 
    facetCenter += geometry.getCoord(facetNodes[n]);
  return ( facetCenter / (double) numFacetNodes );
}

//-----------------------------------------------------------------------------
inline std::ostream& 
MiVolumeCell::toStream(std::ostream& s) const
{
  s << "# num cell's facets" << std::endl;
  s << getNumFacets() << std::endl;

  s << "# num cell's nodes" << std::endl;
  s << getNumNodes();

  std::vector<size_t> facetNodes;
  for (size_t i=0; i<getNumFacets(); ++i)
  {
    facetNodes.clear();
    s << std::endl << "[";
    appendNodesIndexOfFacet(i,facetNodes);
    for (size_t j=0; j<facetNodes.size(); ++j)
      s << facetNodes[j] << " ";
    s << "]";
  }

  return s;
}



#ifdef _WIN32
#  pragma warning( pop )
#endif

#endif

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Open Inventor Toolkit reference manual, generated on 15 Mar 2023
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