CGAL users discussion list

[Bart Janssens <>]

On Wednesday 29 August 2007 14:00:12 Peter Hachenberger wrote:
> typedef Nef_polyhedron_3<Kernel, CGAL::SNC_indexed_items>
> Nef_polyhedron_3;
>
> Maybe that is enough to make your kernel run. I hope so, because I think
> it's an interesting approach and I'd like to see it run. Note, that most
> likely your kernel will have the downside that the representation will
> not be unique any more. Because of the inexact geometry redundant edges
> and facets cannot be identified any more. A different possibility is,
> that your kernel even simplifies items that would not be simplified by
> exact arithmetic because of rounding issues. I'm curious. Let me know
> what happens.

Thanks for the tip. I upgraded to 3.3, and with the above code I get:
CGAL error: assertion violation!
Expr: normalized(cet->circle()) == normalized(ce->circle().opposite())
File: /usr/local/include/CGAL/Nef_3/SNC_external_structure.h
Line: 1153

regards,

Bart