[PyOpenGL-Devel] [ pyopengl-Bugs-2872257 ] glutInit fails on windows 64-bit

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Bugs item #2872257, was opened at 2009-10-03 15:29
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Category: GLUT
Group: v3.0.0
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jason G (reirrac)
Assigned to: Mike C. Fletcher (mcfletch)
Summary: glutInit fails on windows 64-bit

Initial Comment:
On a 64-bit Windows 7 machine, GLUT fails on glutInit with the following traceback:

Traceback (most recent call last):
  File "C:\Programming\NE\HyperNEAT\HyperNEAT_Visualizer\src\HyperNEATVisualizer.py", line 287, in <module>
    visualizer.main()
  File "C:\Programming\NE\HyperNEAT\HyperNEAT_Visualizer\src\HyperNEATVisualizer.py", line 233, in main
    glutInit(sys.argv)
  File "c:\Python26\Lib\site-packages\OpenGL\GLUT\special.py", line 322, in glutInit
    _base_glutInit( ctypes.byref(count), holder )
TypeError: 'NoneType' object is not callable


I tried copying the glut and gle dll's to my c:\windows\system32\ directory but that didn't change anything.

If I comment out the glutInit function, I get this:

Traceback (most recent call last):
  File "C:\Programming\NE\HyperNEAT\HyperNEAT_Visualizer\src\HyperNEATVisualizer.py", line 287, in <module>
    visualizer.main()
  File "C:\Programming\NE\HyperNEAT\HyperNEAT_Visualizer\src\HyperNEATVisualizer.py", line 240, in main
    glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_ALPHA | GLUT_DEPTH)
  File "c:\Python26\Lib\site-packages\OpenGL\platform\baseplatform.py", line 336, in __call__
    self.__name__, self.__name__,
OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInitDisplayMode, check for bool(glutInitDisplayMode) before calling

I get the same error with any of the NeHe opengl lesson code.  It works fine on my linux machine and my windows 32-bit machine, so I think it's something to do with windows 64-bit.  Are there 64-bit versions of the glut and gle DLLs?

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Comment By: Christoph Gohlke (cjgohlke)
Date: 2009-11-13 05:55

Message:
I had the same problem on Python 2.6.4 64-bit, PyOpenGL-3.0.1b1, Windows 7.
Turned out there was a 32-bit glut32.dll file in the PATH, which  was used
instead of the correct 64-bit glut32.dll in
Python26\Lib\site-packages\OpenGL\DLLS. Everything worked once I cleaned
the PATH environment variable. You can download a 64-bit version of
PyOpenGL for Windows at
<http://www.lfd.uci.edu/~gohlke/pythonlibs/#pyopengl>

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