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["Sebastien Loriot (GeometryFactory)" <>]

 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.