CGAL users discussion list

[Peter Hachenberger <>]

Hi David,

> If you compile this code and rotate the volume, you'll see these 2 facets in
> the back.
> Am I doing wrong operations, or is it another thing?

I guess you refer to the two triangular facets filling the corners.
These result from your operations. The polyhedron b3 has 9 facets. 2 of
them are shaped like and L. So, they are not convex. This means that
performing a convex hull operation on the location of the vertices
changes the form of the facets. That's were you got your additional
features from. It looks like the same problem as before, since the
drawing artifacts from Geomview also result from problems with
non-convexity.

Peter