CGAL users discussion list

[Philipp Moeller <>]

sgdimitris 
<>
 writes:

> Thank you for the quick and helpful answer.
> Yes I meant iterate by "take".
> I would like to ask you one more question. How can I refer to vertices of
> each facet.
> for example i want to print the vertices of each facet
> So I have to do something like
> "
> for(Facet_iterator f = polyhedron.facets_begin();
>     f != polyhedron.facets_end();
>     ++f) {
>     // Print the vertices
>   } 
> "
> as I did with edges in the following code
> "
> for ( Edge_iterator w = poly.edges_begin(); w != poly.edges_end(); ++w)
>         std::cout << "First Vertex of the edge" <<
> w->opposite()->vertex()->point() << " Second Vertex of the edge" <<
> w->vertex()->point() << std::endl;
> "
> Best regards,
> Dimitris
>

If you have a look at the documentation [1] you will see that each facet
gives you Halfedge_around_facet_circulator through the facet_begin and
facet_end member functions.

You then can use this circulator to walk all halfedges and get their
vertices through the vertex member function [2].

Is the documentation that confusing?

-- 
Philipp Moeller
GeometryFactory

[1] : 
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Polyhedron_ref/Class_Polyhedron_3-Traits---Facet.html
[2] : 
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Polyhedron_ref/Class_Polyhedron_3-Traits---Halfedge.html