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[Joe C <>]

I also tried this using latest CGAL 3.5. This time I got error when converting Polyhedron_1 to Nef_polyhedron_3:

Error !!!!!!!!!!!!!!!!!!!!!!!
Error !!!!!!!!!!!!!!!!!!!!!!!
Error !!!!!!!!!!!!!!!!!!!!!!!
CGAL error: assertion violation!
_expression_ : pe_prev->is_border() || !pe_prev->facet()->plane().is_degenerate()
File       : E:\CGAL-3.5\Include\CGAL/Nef_3/polyhedron
_3_to_nef_3.h
Line       : 217
Explanation:
Refer to the bug-reporting instructions at http://www.cgal.org/bug_report.html

Before converting, I checked Polyhedron_1 which was valid and closed.

On Mon, Dec 21, 2009 at 11:14 AM, Joe C <> wrote:

Hi Laure,

Thanks for your reply. But it did not work for me... The polyhedra are already triangulated, i. e. they are both pure triangles. Maybe it is a bug in Nef_polyhedron_3?

Joe

On Mon, Dec 21, 2009 at 8:42 AM, Laure Guicherd <> wrote:

Hi Joe,

I had the same problem a few months ago, did you try triangulating your polyhedrons before converting them to nef ? This solved it for me :)

Good luck,
Laure

Joe C wrote:

I still could not find solution. Any other requirements on polyhedron besides "closed" and "valid" to make sure the intersection go through?

Joe

On Fri, Dec 18, 2009 at 2:24 PM, Joe C < <mailto:>> wrote:

   Hi All,

   Intersection of Nef_polyhedron_3 failed When I tried to compute
   the intersection of two polyhedra (see attached files). I am using
   Exact_predicates_exact_constructions_kernel. Both of the polyhedra
   are closed and valid and have been converted to Nef_polyhedron_3
   successfully. It failed when executing the intersection of
   converted Nef_polyhedron_3. The version of CGAL is 3.4 with Visual
   Studio 2008 (SP1) and Win XP Professional.

   Anyone can help with this?

   Thanks.
   Joe

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