CGAL users discussion list

[Andre Massing <>]

Hi, thanks for the fast reply.

Stephane Tayeb wrote:
> Andre Massing wrote:
> > Dear all,
> >
> > since we started to use CGAL in our mesh library part of our DOLFIN fem
> > library, I came across with another missing intersection detection, this
> > time in case of a Triangle_3 Tetrahedron_3 intersection, concerning the
> > Triangle_3_Tetrahedron_3_do_intersect.h file.
> >
> >
> > Greetings,
> > Andre Massing
>
> Hi Andre,
>
> I didn't get a close look on your problem, but i see you are using a 
> non-filtered kernel (Simple_cartesian<double>). If you switch to a 
> filtered kernel (e.g. 
> CGAL::Exact_predicates_inexact_constructions_kernel), you should avoid 
> such failures (your attached file runs ok with epic kernel).

Yes, that's right, but I started to narrow down the problem from the 
AABB tree and according to their performance tests runs the 
Simple_cartesian<double> 2.5 times faster then the 
CGAL::Exact_predicates_inexact_constructions_kernel.

So I was wondering, whether one could circumvent this problem for former 
kernel typ by a slight change in the implementation.