CGAL users discussion list

[Thomas Holzmann <>]

On 02/15/2017 03:28 PM, Sebastien Loriot (GeometryFactory) wrote:
> On 02/15/2017 03:15 PM, Thomas Holzmann wrote:
> > Hi,
> >
> > I have a CGAL::Triangulation_3, which I manually created (just converted
> > a given triangulation to a CGAL data structure) and which is valid (
> > checked with triangulation.is_valid()). I'm currently using
> > Exact_predicates_inexact_constructions_kernel, but I'm having problems
> > when making various geometric operation afterwards. Therefore, I want to
> > change to Exact_predicates_exact_constructions_kernel.
> >
> > However, after changing the kernel, the conversion back to a double
> > representation doesn't work anymore, ie.
> >
> > double x = CGAL::to_double(vertex->point().x());
> > ...
> >
> > results in a segmentation fault sometimes. It doesn't happen for all
> > vertices, just for some.
> >
> > The same part of the code with inexact constructions kernel works
> > without problems.
> >
> > Does someone have an idea what the problem could be?
> >
> > Thomas
> Check that the vertex is not the infinite vertex

infinity is checked with triangulation.is_infinite(). So no infinite 
vertices should be touched.

--
====================================================
Dipl.-Ing. Thomas Holzmann
TU Graz - Institut fuer Maschinelles Sehen und Darstellen
Graz University of Technology - Institute for Computer Graphics & Vision
Inffeldgasse 16/II, 8010 Graz, Austria

http://www.icg.tugraz.at/
phone: +43 316 873 5091
====================================================