CGAL users discussion list

["Laurent Rineau (GeometryFactory)" <>]

Le jeudi 09 février 2012 14:18:14 Dominik Szczerba a écrit :
> Thank you, this is very useful.
> 
> Still one question though: what is ci->neighbor(i) supposed to return
> if a cell does not have a neighbor i? I tried testing against NULL,
> but it does not seem to be the case. I also tried
> ci->has_neighbor(ci->neighbor(i) but this seems to always return true.

In CGAL triangulations, all cells always have d+1 neighbors (d is the 
dimension).

C3t3 add a layer on top of CGAL triangulations. Given a c3t3 and a cell 
handle 
ch, you must call:

  c3t3.is_in_complex(ch)

to know if a given cell of the triangulation is part of the mesh or not.

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/