topology.h

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// -*- C++ -*-

#if !defined(__geom_mesh_simplex_topology_h__)
#define __geom_mesh_simplex_topology_h__

#include "Simplex.h"

BEGIN_NAMESPACE_GEOM

//---------------------------------------------------------------------------
// Simplex indices.
//---------------------------------------------------------------------------



void
computeOtherIndices(int i, int j, int* a, int* b);



int
computeOtherIndex(int i, int j, int k);



template<int N, typename V, typename T>
inline
bool
hasFace(const Simplex<N,V,T>& simplex, 
        const typename Simplex<N,V,T>::Face& face,
        int* faceIndex) {
  for (int n = 0; n != face.size(); ++n) {
    if (! simplex.hasVertex(face[n])) {
      *faceIndex = n;
      return false;
    }
  }
  return true;
}



template<int N, typename V, typename T>
inline
bool
hasFace(const Simplex<N,V,T>& simplex, 
        const typename Simplex<N,V,T>::Face& face) {
  int faceIndex;
  return hasFace(simplex, face, &faceIndex);
}



template<typename V, typename T>
inline
bool
hasFace(const Simplex<3,V,T>& simplex, const V& x, const V& y, const V& z) {
  return simplex.hasVertex(x) && simplex.hasVertex(y) && simplex.hasVertex(z);
}



template<typename V, typename T>
inline
bool
hasFace(const Simplex<3,V,T>& simplex, const V& x, const V& y, const V& z,
        int* faceIndex) {
  if (hasFace(simplex, x, y, z)) {
    *faceIndex = computeOtherIndex(simplex.getVertexIndex(x),
                                   simplex.getVertexIndex(y),
                                   simplex.getVertexIndex(z));
    return true;
  }
  return false;
}

END_NAMESPACE_GEOM

#define __geom_mesh_simplex_topology_ipp__
#include "topology.ipp"
#undef __geom_mesh_simplex_topology_ipp__

#endif

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