CGAL users discussion list

[Andreas Fabri <>]

Nizar Khalifa Sallem wrote:
> So, if I pick any 2 adjacent facets in a Delaunay3D triangulation they 
> will be consistently oriented?

No they will not.  This is already due to the fact that a facet is a
std::pair<Cell_handle_int> which means that the facet can be seen
from different sides.

andreas


> --
> Nizar SALLEM
> Robotics and Artificial Intelligence PhD student
> LAAS-CNRS
> 7, Avenue Colonel Roche
> 31077 Toulouse CEDEX 4
> FRANCE
>
>
>
>
> On May 14, 2009, at 2:17 PM, Andreas Fabri wrote:
>
> > Nizar Khalifa Sallem wrote:
> > > Hi,
> > > Is there in CGAL a way to check if two triangular facets are 
> > > orientation compatible in either Triangulation or Polyhedra modules ?
> >
> > In a Triangulation_2 as well as in a Polyhedron faces are consistently 
> > oriented.
> > This is not the case for a Complex_2_in_triangulation_3, where facets
> > between tetrahedra can be marked as being part of the compex.
> >
> > best regards,
> >
> > andreas
> >
> > > Thanks.
> > > --
> > > Nizar SALLEM
> > > Robotics and Artificial Intelligence PhD student
> > > LAAS-CNRS
> > > 7, Avenue Colonel Roche
> > > 31077 Toulouse CEDEX 4
> > > FRANCE
> >
> > --
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