CGAL users discussion list

["Laurent Rineau (CGAL/GeometryFactory)" <>]

Le Wednesday 14 May 2014 11:50:07 Per Zetterlund a écrit :
> Thank you for clearing that up.
> 
> So I have a Delaunay_triangulation_3 from which
> I'd like to extract a triangular mesh. I have a
> "FacetSelector" functor to indicate what facets
> to extract. My plan was to use the missing constructor
> and then use CGAL::output_surface_facets_to_polyhedron
> to get a polyhedron object representing my mesh.
> How should I do it instead? Build the complex manually
> by adding facets? Or can I plug in my functor into
> make_surface_mesh() somehow?

You can also implement the missing constructor! :-)

- construct the c2t3 object from the Delaunay_triangulation_3 reference,
- loop on all facets of the triangulation, and if the fonctor result is 
positive, call:
    add_to_complex (Facet f);

That would be something like:

  C2t3 c3t3(tr);
  for (Finite_facets_iterator fit = tr.finite_facets_begin();
       fit != tr.finite_facets_end(); ++fit)
  {
     if(functor(*fit)) {
        c2t3.add_to_complex(*fit);
     }
  }

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