CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

If you have a index associated to faces, then from a halfedge you can 
access the faces using

halfedge_descriptor h;
face_descriptor f1 = face(h, mesh);
halfedge_descriptor h_opp = opposite(h, mesh);
if (!CGAL::is_border(h_opp, mesh))
  face_descriptor f2 = face(h_opp, mesh);


with halfedge_descriptor and face_descriptor being nested types of
boost::graph_traits<Mesh_type>

To associate an id to a face, you can use internal property (built-in
with Surface_mesh or with a traits with ids like 
CGAL::Polyhedron_items_with_id_3 [1]). In general you can also use
dynamic properties [2]


Sebastien.

[1] 
https://doc.cgal.org/latest/BGL/classCGAL_1_1Polyhedron__items__with__id__3.html
[2] https://doc.cgal.org/latest/BGL/index.html#title25

On 06/22/2018 10:48 AM, sergio wrote:
> I have the following loop iterator:
>
> void printAdjancenFaceToEdge(Polyhedron mesh)
> {
>      std::vector<int> nBorder(mesh.size_of_vertices(), 0);
>      for (Polyhedron::Halfedge_const_iterator he = mesh.halfedges_begin(); he
> != mesh.halfedges_end(); he++) {
>          if (!he->is_border())
>              continue;
>
>          // print here ids
>      }
>
>
>      return true;
> }
> is it possible to print the adjacent faces index of every edge?
>
>
>
> --
> Sent from: http://cgal-discuss.949826.n4.nabble.com/