CGAL users discussion list

["Laurent Rineau (GeometryFactory)" <>]

On mardi 21 juin 2011 14:40:41 GClaeys wrote:
> Hello,
> 
> I have a problem with iterating over all edges of a 3D mesh complex. I use
> the finite_edges_iterator from the
> CGAL::Mesh_complex_3_in_triangulation_3::Triangulation class, but this
> iterator returns not only the internal edges but also edges outside the
> tetrahedron mesh.
> 
> for (Triangulation::Finite_edges_iterator it = tr.finite_edges_begin(); it
> != tr.finite_edges_end(); ++it) {
>       start = it->first->vertex(it->second)->point();
>       end = it->first->vertex(it->third)->point();
> //...
> }
> 
> Is there a way to iterate over the internal edges only (those of the
> tetrahedra)?

That is difficult.

Why do you need only the edges of the mesh? Would it be OK to iterate over 
the 
facets or the tetrahedra of the mesh instead?

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/