CGAL users discussion list

["Fred Dorosh" <>]

> Yeah, a little bit of a rash statement on my part.  Definitely possible
> to come up with counter-examples.  However, the whole point of
> Nef_polyhedra is to get around these ugly cases (ie: where the
> intersection are or contain surfaces, etc).  Is it possible for two
> nef_polyhedron_3 without holes to produce an intersection with holes?

I can think of an example of that, yes (both 3D holes and 2D holes). But I
seem to recall that the wider issue is that Polyhedron_3 can only
represent manifold objects, and there are plenty of ways to wind up with
non-manifold Nef3's.

Try computing the closure() of the interior() of your Nef. This should
eliminate any hanging geometry.

Fred