A simple OpenGL and Tk interface used for the OpenGL tutorial in
http://www.eecs.tulane.edu/www/Terry/OpenGL/Introduction.html
Other than changing "-lMesatk" to "-lgltk" and "#include <gltk.h>" to
"#include <GL/gltk.h>", everything should work as described on that page.
- Satoshi
asami@FreeBSD.org