CGAL users discussion list

[Sylvain Pion <>]

Matthijs Sypkens Smit a écrit :
> Hi all,
>
> It seems that the CGAL Triangulation_3 does not support holes. When I build 
> such a triangulation by manipulation the data_structure "by hand", then 
> the validity check on the data structure fails with "Euler relation 
> unsatisfied". I guess that could be expected since the manual mentions how 
> the triangulation is actually a covering of the 4D sphere.
>
> Can anyone comment on the problems of using the CGAL Triangulation for 
> genus > 0 objects? It is at least possible to traverse the object. Could I 
> disable the check for conformity to the Euler relation and have something 
> workable, or would I be bound to run into troubles along the road?

Try it :-)

> If so, are there plans to support such triangulations in the future?

Maybe.  That said, if the only problem is the Euler check in is_valid(),
this could be easily workable (just pass the genus to is_valid).

--
Sylvain Pion
INRIA Sophia-Antipolis
Geometrica Project-Team
CGAL, http://cgal.org/

Attachment: smime.p7s
Description: S/MIME Cryptographic Signature