These demos run only on SGI machines and require the 'gl' built-in module.
The demonstrate the abilities of SGI's GL library as well as the ease of
GL programming in Python.  Most demos require the Z-buffer (aka
24-bitplane) option.  Press ESC to get out of any of them.

backface.py	Demonstrates the 'backface' GL function.

kites.py	Show 3 flying kites.  Demonstrates the rendering speed
		obtainable by Python programs.

mclock.py	A colorful clock with more options than you can
		remember.  Works on 8-bit machines, but allows more
		colors on 24-bit machines.  See mclock.doc for more
		info.

mixing.py	Demonstrates the effect of color mixing: through
		frequent color switching it gives the effect of white
		light.

nurbs.py	A simple demonstration of the 'nurbs' GL functions.
		Press left mouse button to toggle surface trimming.

zrgb.py		Displays a 3-D Gouraud-shaded figure which can be moved
		around with the mouse.

glstdwin/	This is quite different: a partial STDWIN emulation
		using GL!  Requires only small changes to Python
		programs that use STDWIN.  Some features not yet
		implemented, e.g., scroll bars.