CGAL users discussion list

[Martin Baeker <>]

Dear all,

I'm trying to develop an application where I have to cut a polyhedron
along a plane, shift one part of it in the plane and glue the two
together again. 

I succeeded doing this for a simple cube using
polyhedron_cut_plane_3.h. However, after re-joining the two parts of
the polyhedron, each rectangular facet in the new polyhedron consists now
of two triangles.

Thus it is not possible to re-do the same thing with a different plane
because the algorithm in polyhedron_cut_plane_3.h seems to rely on the
facets being non-coplanar.

Is there any simple way of getting around this problem by, for example,

a) rejoining the triangles to rectangles on the polyhedron 
or
b) re-writing the polyhedron_cut_plane_3-routine, so that it looks
directly at the edges instead of intersections of facets?

I'm grateful for any help,

Martin.


                   Priv.-Doz. Dr. Martin Bäker
                   Institut für Werkstoffe
                   Technische Universität Braunschweig
                   Langer Kamp 8
                   38106 Braunschweig
                   Germany
                   Tel.: 00-49-531-391-3073
                   Fax   00-49-531-391-3058
                   e-mail 
<>