Author Bernhard Geiger
Copyright (C) 1993 by INRIA Sophia Antipolis

Permission to use, copy, modify, and distribute this software and its
documentation for educational, research, and non-profit purposes without
fee is hereby granted, provided that the above copyright notice and the
original authors name appear in all copies and that both that copyright
notice and this permission notice appear in supporting documentation.
This software is provided "as is" without express or implied warranty.