Bezier Triangles and N-Patches
FROM: http://www.cnblogs.com/len3d/archive/2008/08/10/1264807.html
http://www.gamasutra.com/features/20020715/mollerhaines_01.htm
http://www.gamasutra.com/features/20020715/mollerhaines_02.htm
FROM: http://www.cnblogs.com/len3d/archive/2008/08/10/1264807.html
http://www.gamasutra.com/features/20020715/mollerhaines_01.htm
http://www.gamasutra.com/features/20020715/mollerhaines_02.htm