[PyOpenGL-Users] Glut close function

[Gijs <in...@bs...>]

Hello List,

I tried to bind an exit-function with Glut, but the function you 
normally use to bind your exit-function with, glutCloseFunc, does not 
exist in Mac OS X. It's called glutWMCloseFunc in Mac OS X. Now this is 
not much of a problem, but when I try to use glutCloseFunc, it gives me 
the following traceback:
Traceback (most recent call last):
   File "./runtests.py", line 107, in <module>
     glutCloseFunc(exitProgram)
   File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/OpenGL/GLUT/special.py", 
line 131, in __call__
   File 
"/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/OpenGL/GLUT/special.py", 
line 100, in failFunction
OpenGL.error.NullFunctionError: Undefined GLUT callback function Close, 
check for bool(glutCloseFunc) before calling

Kind of obvious of course, but I wanted to know if there is a normal way 
to check if this function really exists. I could check for the platform 
I'm running the program in, but to me it seems a better solution to 
check for the existence of this function. Even neater would be that 
PyOpenGL binds glutWMCloseFunc to glutCloseFunc when ran in Mac OS X. 
That would at least keep the Glut/OpenGL code platform independent.

Regards, Gijs