Developer Documentation
MeshNavigationT_impl.hh
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45 
46 
47 //=============================================================================
48 //
49 // IMPLEMENTATION
50 //
51 //=============================================================================
52 
53 #define MESHNAVIGATIONT_C
54 
55 //== INCLUDES =================================================================
56 
57 #include "MeshNavigationT.hh"
58 
59 #include <OpenMesh/Core/Mesh/TriMesh_ArrayKernelT.hh>
60 #include <OpenMesh/Core/Geometry/MathDefs.hh>
61 
62 #include <queue>
63 //== NAMESPACES ===============================================================
64 
65 namespace MeshNavigation {
66 
67 //== IMPLEMENTATION ==========================================================
68 
69 template < typename MeshT >
70 inline
71 typename MeshT::HalfedgeHandle
72 opposite_halfedge(MeshT& _mesh , typename MeshT::HalfedgeHandle _he) {
73  typename MeshT::VertexOHalfedgeIter opp_he( _mesh , _he);
74  ++opp_he;
75  ++opp_he;
76  ++opp_he;
77  return (*opp_he);
78 }
79 
80 template < typename MeshT >
81 inline
82 typename MeshT::VertexHandle
83 findClosestBoundary(MeshT* _mesh , typename MeshT::VertexHandle _vh){
84 
85  //add visited property
87  _mesh->add_property(visited,"Visited Property" );
88 
89  //init visited property
90  typename MeshT::VertexIter v_it, v_end = _mesh->vertices_end();
91  for( v_it = _mesh->vertices_begin(); v_it != v_end; ++v_it )
92  _mesh->property( visited, *v_it ) = false;
93 
94  std::queue< typename MeshT::VertexHandle > queue;
95  queue.push( _vh );
96 
97  while(!queue.empty()){
98  typename MeshT::VertexHandle vh = queue.front();
99  queue.pop();
100  if (_mesh->property(visited, vh)) continue;
101 
102  for (typename MeshT::VertexOHalfedgeIter voh_it(*_mesh,vh); voh_it.is_valid(); ++voh_it){
103 
104  if ( _mesh->is_boundary(*voh_it) ){
105  _mesh->remove_property(visited);
106  return _mesh->to_vertex_handle(*voh_it);
107  }else{
108  queue.push( _mesh->to_vertex_handle(*voh_it) );
109  }
110  }
111  _mesh->property(visited, vh) = true;
112  }
113 
114  _mesh->remove_property(visited);
115  return typename MeshT::VertexHandle(-1);
116 }
117 
118 
119 //=============================================================================
120 } // MeshNavigation Namespace
121 //=============================================================================
MeshT::VertexHandle findClosestBoundary(MeshT *_mesh, typename MeshT::VertexHandle _vh)
Find the closest boundary vertex to another vertex.
MeshT::HalfedgeHandle opposite_halfedge(MeshT &_mesh, typename MeshT::HalfedgeHandle _he)
Functions for getting information about a mesh.