StatusNodeMods.hh

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\*===========================================================================*/

#ifndef STATUSNODEMODS_HH
#define STATUSNODEMODS_HH

//=============================================================================
//
//  Mesh Attribute bits for the Status Nodes
//
//=============================================================================

enum StatusBits {
  AREA      = OpenMesh::Attributes::UNUSED << 1,
  HANDLEAREA = OpenMesh::Attributes::UNUSED << 2
};

//=============================================================================
//
//  Mods for the Status Nodes
//
//=============================================================================

template< class MeshT >
struct AreaNodeMod
{
  static inline bool is_area(const MeshT& _m, typename MeshT::VertexHandle _vh)
  { return _m.status(_vh).is_bit_set(AREA); }

  static inline bool is_area(const MeshT& _m, typename MeshT::FaceHandle _fh)
  {
    for (typename MeshT::ConstFaceVertexIter cfv_it = _m.cfv_iter(_fh); cfv_it.is_valid(); ++cfv_it)
      if (_m.status(*cfv_it).is_bit_set(AREA))
        return true;

    return false;
  }

  static bool is_vertex_selected(const MeshT& _mesh, typename MeshT::VertexHandle _vh)
  {
    if (_mesh.is_isolated(_vh))
      return is_area(_mesh, _vh);
    else
      return false;
  }


  static bool is_edge_selected(const MeshT& /*_mesh */, typename MeshT::EdgeHandle /* _eh */ )
  {
    return false;
  }


  static bool is_halfedge_selected(const MeshT& /*_mesh */, typename MeshT::HalfedgeHandle /* _eh */ )
  {
    return false;
  }

  static bool is_face_selected(const MeshT& _mesh, typename MeshT::FaceHandle _fh)
  {
    return is_area(_mesh, _fh);
  }
};

template< class MeshT >
    struct HandleNodeMod
{

  static inline bool is_handle(const MeshT& _m, typename MeshT::VertexHandle _vh)
  { return _m.status(_vh).is_bit_set(HANDLEAREA); }

  static inline bool is_handle(const MeshT& _m, typename MeshT::FaceHandle _fh)
  {
      bool isArea = true;
      for(typename MeshT::ConstFaceVertexIter cfv_it = _m.cfv_iter(_fh); cfv_it.is_valid(); ++cfv_it) {
          if(!_m.status(*cfv_it).is_bit_set(HANDLEAREA)) {
              isArea = false;
              break;
          }
      }
      return isArea;
  }


  static bool is_vertex_selected(const MeshT& _mesh, typename MeshT::VertexHandle _vh)
  {
    if (!is_handle(_mesh, _vh))
      return false;

    for (typename MeshT::CVFIter vf_it(_mesh.cvf_iter(_vh)); vf_it.is_valid(); ++vf_it)
      if (is_handle(_mesh, *vf_it))
        return false;

    return true;
  }

  static bool is_edge_selected(const MeshT& _mesh, typename MeshT::EdgeHandle _eh)
  {
    typename MeshT::HalfedgeHandle hh;
    typename MeshT::FaceHandle     fh;

    hh = _mesh.halfedge_handle(_eh, 0);
    if (!is_handle(_mesh, _mesh.to_vertex_handle(hh))) return false;

    fh = _mesh.face_handle(hh);
    if (fh.is_valid() && is_handle(_mesh, fh)) return false;

    hh = _mesh.halfedge_handle(_eh, 1);
    if (!is_handle(_mesh, _mesh.to_vertex_handle(hh))) return false;

    fh = _mesh.face_handle(hh);
    if (fh.is_valid() && is_handle(_mesh, fh)) return false;

    return true;
  }


  static bool is_halfedge_selected(const MeshT& /*_mesh */, typename MeshT::HalfedgeHandle /* _eh */ )
  {
    return false;
  }


  static bool is_face_selected(const MeshT& _mesh, typename MeshT::FaceHandle _fh)
  {
    return is_handle(_mesh, _fh);
  }
};

template< class MeshT >
    struct FeatureNodeMod
{

  static bool is_vertex_selected(const MeshT& _mesh, typename MeshT::VertexHandle _vh)
  {
    return _mesh.status(_vh).feature();
  }

  static bool is_edge_selected(const MeshT& _mesh, typename MeshT::EdgeHandle _eh)
  {
    return _mesh.status(_eh).feature();
  }


  static bool is_halfedge_selected(const MeshT& _mesh, typename MeshT::HalfedgeHandle _heh)
  {
    return _mesh.status(_heh).feature();
  }

  static bool is_face_selected(const MeshT& _mesh, typename MeshT::FaceHandle _fh)
  {
    return _mesh.status(_fh).feature();
  }

};

#endif