CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

 wrote:
> It's what I want.
> But it seems that by default the vertex class has no member id.
> Is there an option ?

Have a look at this item class
CGAL/Polyhedron_items_with_id_3.h

Facets, halfedges and vertices will have an id.

S.

> Le 27/04 - 11:49, Sebastien Loriot (GeometryFactory) a écrit :
> >  wrote:
> > > I have a polyhedron P.
> > > And I want to associate to each face an index : the distance from
> > > P->facets_begin() to the iterator pointing to the face (for example).
> > >
> > > Now, given a halfedge h, I would like to know the number of h.facets().
> > > I tried std::distance(P.facets_begin(), h.facets()) but it doesn't work
> > > since one is an iterator and the other a handle.
> > >
> > > Is there a simple way to do that ?
> > Is something like this a correct solution for your problem?
> >
> > unsigned i=0
> > for (Polyhedron::Facet_iterator
> > it=P.facets_begin();it!=P.facets_end();++it){
> >   it->id()=i++;
> > }
> >
> > S.