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

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.