May 26, 2018
Generic Polygon Clipper
An algorithm for calculating the difference, intersection, exclusive-or or union of arbitrary polygon sets.
Copyright C 1997-2004, Advanced Interfaces Group, University of Manchester.
This software is free for non-commercial use. It may be copied, modified, and redistributed provided that this copyright notice is preserved on all copies. The intellectual property rights of the algorithms used reside with the University of Manchester Advanced Interfaces Group. You may not use this software, in whole or in part, in support of any commercial product without the express consent of the author.
Software documentation at WWW http//www.cs.man.ac.uk/~toby/alan/software/gpc.html