CGAL users discussion list

["Jens K. Becker" <>]

Hi all,

I have a quick question: In a triangulation, eache edge of the
triangulation can obviously belong to more than 2 facets. How about a
polyhedron? Is that possible too? I frequently generate polyhedra from
triangulations that sometimes have a halfedge which belongs to 4 facets.
Constructing them works fine, but reloading them (using off-format)
produces the error message (numbers of vertices and facets of course are
always different):

CGAL::Polyhedron_incremental_builder_3<HDS>::
lookup_halfedge(): input error: facet 244 shares a halfedge from vertex
694 to vertex 695 with facet 232.
[....]

I know where it comes from, but I don't know how to test for this (and
if it happens what to do then)... Any ideas?

Thanks for any help,

Jens

-- 
Dr. J.K. Becker
University of Tuebingen - Institute for Geoscience
Wilhelmstrasse 56 - 72072 Tuebingen (Germany)
Tel.: ++49 7071 29 73147
Web: http://www.jkbecker.de