CGAL users discussion list

[sergio campo <>]

What happen if the structure has non-manifold edges, it will work?

On Fri, Jun 22, 2018 at 11:35 AM, Sebastien Loriot (GeometryFactory) <> wrote:

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?



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