2 - culling code adapted from Ruud van Gaal
4 Implementation of the fast polygon triangulation algorithm
5 by R.Seidel (1991), implementation by Narkhede A. and
8 - much of the code comes from glterm by <helly@gmx.net>
10 - see this file for the model artists
13 - some win32 addition come from rudi. <chru@hrz.tu-chemnitz.de>