gpctool - a graphical user interface and development environment for the gpc generic polygon clipper library. Author: Alan Murta (email: gpc@cs.man.ac.uk) Copyright: (C) 1997-1999, 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. WWW: http://www.cs.man.ac.uk/~toby/alan/software/