CGAL users discussion list

[Laurent Rineau <>]

On Friday 28 November 2008 14:17:06 Sylvain Pion wrote:
> Jens K. Becker wrote:
> > The program compiles fine but does
> > not work (it always crashes when trying to remove halfedges (using
> > join_facets). If I run it in valgrind, it perfectly works.

> Valgrind does not emulate FPU rounding modes which are used to implement
> interval arithmetic.  The later being used in filtered kernels which you
> can find in many places in CGAL.  A solution is to used either inexact
> fast non-robust, risky, use-at-your-own-risk, may-or-may-not-work-for-you
> kernels e.g. Simple_cartesian<double>, or a slow exact kernel, e.g.
> Simple_cartesian<Gmpq>.  That may be enough for debugging.
>
> The ideal solution would be to ping the valgrind developers (again),
> so that they work on supporting this missing feature.

Sylvain, you missed a point: Jens program works only *IN* valgrind, and 
*that* 
is strange. What sort of CGAL can work only if rounding mode are never 
changed?

-- 
Laurent Rineau, PhD
Engineer at GeometryFactory
http://www.geometryfactory.com/