CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 02/17/2015 10:40 PM, kintel wrote:
> Bump.
>
> The issue is that CGAL throws exceptions from destructors. These exceptions
> are not catchable and causes programs to terminate. Read e.g.
> http://www.kolpackov.net/projects/c++/eh/dtor-1.xhtml
>
> See e.g. ~Polyhedron_incremental_builder_3()
>
> We work around this by forking parts of CGAL into our own sources and patch
> it to submission, which is far from ideal.
>
>   -Marius

Your input is self-intersecting which is why you have this error.
If you import the model using OFF_to_nef_3 and then try to export
to polyhedron, you'll get the following assertion:

terminate called after throwing an instance of 
'CGAL::Precondition_exception'
  what():  CGAL ERROR: precondition violation!
Expr: is_simple()
File: /home/sloriot/CGAL/git/cgal/Nef_3/include/CGAL/Nef_polyhedron_3.h
Line: 1041
Aborted

because of the self-intersection that was fixed during the import to Nef_3.

Is it an option to test for self-intersections before trying to do this?

(using CGAL::self_intersect(P) from 
include/CGAL/Self_intersection_polyhedron_3.h for example)

Sebastien.


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