CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 07/29/2014 08:56 AM, Olivier Devillers wrote:
> Le 29/07/14 04:58, chrism a écrit :
> > Hi all, my past two questions ended up being me missing documentation,
> > so I
> > apologize in advance if this is the case here. However, I don't think
> > it is.
> >
> > Suppose I have a triangulation T1, and I create a copy of it in T2 (so T1
> > and T2 are equal in every way). Then, I want to iterate over the faces
> > of T1
> > and T2 simultaneously with iterators t1 and t2. However, I want the
> > constraint that t1 and t2 point to the 'same' face in T1 and T2.
> >
> > This would be analogous to traversing two duplicated vectors, where
> > v[0] ==
> > v2[0].
> >
> >  From what I understand, finite_face_iterator makes no guarantees
> > about the
> > determinism of: a) the starting face or b) traversal order.
> yes, there is no guarantee.
>
>
> You may enrich your triangulation faces to be able to put cross pointers
> between the faces of the two triangulations.

Note that if you are not doing any vertex removal I think it should be
deterministic in 2D.

Sebastien.