TriConnectivity.hh

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#ifndef OPENMESH_TRICONNECTIVITY_HH
#define OPENMESH_TRICONNECTIVITY_HH

#include <OpenMesh/Core/Mesh/PolyConnectivity.hh>

namespace OpenMesh {

class OPENMESHDLLEXPORT TriConnectivity : public PolyConnectivity
{
public:

  TriConnectivity() {}
  virtual ~TriConnectivity() {}

  inline static bool is_triangles()
  { return true; }

  inline void assign_connectivity(const TriConnectivity& _other)
  { PolyConnectivity::assign_connectivity(_other); }
  
  inline void assign_connectivity(const PolyConnectivity& _other)
  { 
    PolyConnectivity::assign_connectivity(_other); 
    triangulate();
  }
  

  FaceHandle add_face(const VertexHandle* _vhandles, size_t _vhs_size);
  
  FaceHandle add_face(const std::vector<VertexHandle>& _vhandles);

  FaceHandle add_face(VertexHandle _vh0, VertexHandle _vh1, VertexHandle _vh2);
  

  inline VertexHandle opposite_vh(HalfedgeHandle _heh) const
  {
    return is_boundary(_heh) ? InvalidVertexHandle :
                               to_vertex_handle(next_halfedge_handle(_heh));
  }

  VertexHandle opposite_he_opposite_vh(HalfedgeHandle _heh) const
  { return opposite_vh(opposite_halfedge_handle(_heh)); }



  bool is_collapse_ok(HalfedgeHandle _heh);

  HalfedgeHandle vertex_split(VertexHandle v0, VertexHandle v1,
                              VertexHandle vl, VertexHandle vr);

  bool is_flip_ok(EdgeHandle _eh) const;

  void flip(EdgeHandle _eh);


  void split(EdgeHandle _eh, VertexHandle _vh);

  void split_copy(EdgeHandle _eh, VertexHandle _vh);

  inline void split(FaceHandle _fh, VertexHandle _vh)
  { PolyConnectivity::split(_fh, _vh); }

  inline void split_copy(FaceHandle _fh, VertexHandle _vh)
  { PolyConnectivity::split_copy(_fh, _vh); }


private:
  HalfedgeHandle insert_loop(HalfedgeHandle _hh);
  HalfedgeHandle insert_edge(VertexHandle _vh,
                             HalfedgeHandle _h0, HalfedgeHandle _h1);
};

}

#endif//OPENMESH_TRICONNECTIVITY_HH