[PyOpenGL-Devel] [ pyopengl-Bugs-3081957 ] OpenGL.error.NullFunctionError: Attempt to call an undefined

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Bugs item #3081957, was opened at 2010-10-06 07:11
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Category: GLUT
Group: OpenGLContext v2.0
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Greg Hazel (ghazel)
Assigned to: Mike C. Fletcher (mcfletch)
Summary: OpenGL.error.NullFunctionError: Attempt to call an undefined

Initial Comment:
Trying to run this simple example here:
http://blog.vrplumber.com/index.php?/archives/2324-Sphere-rendering-with-numpy....html

I get:
C:\Users\Greg\Downloads>shader_sphere.py
WARNING:OpenGL.arrays.numpymodule:Unable to load numpy_formathandler accelerator from OpenGL_accelerate
WARNING:context:Python Image Library (PIL) not installed, no Image support available
http://www.pythonware.com/products/pil/index.htm
WARNING:context:Unable to load node implementation for MMImageTexture: 'module' object has no attribute 'MMImageTexture'
Traceback (most recent call last):
  File "C:\Users\Greg\Downloads\shader_sphere.py", line 116, in <module>
    TestContext.ContextMainLoop()
  File "C:\Python27\lib\site-packages\openglcontext-2.1.0a11-py2.7.egg\OpenGLContext\glutcontext.py", line 154, in ContextMainLoop
    render = cls( *args, **named)
  File "C:\Python27\lib\site-packages\openglcontext-2.1.0a11-py2.7.egg\OpenGLContext\glutcontext.py", line 30, in __init__
    glutInitDisplayMode( self.DISPLAYMODE )
  File "C:\Python27\lib\site-packages\pyopengl-3.0.1-py2.7.egg\OpenGL\platform\baseplatform.py", line 340, in __call__
    self.__name__, self.__name__,
OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInitDisplayMode, check for bool(glutInitDisplayMode) before calling


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Comment By: Nobody/Anonymous (nobody)
Date: 2011-06-19 21:17

Message:
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Comment By: Mike C. Fletcher (mcfletch)
Date: 2010-10-18 12:57

Message:
Then you will need a 64-bit build of GLUT, I'm guessing.  FreeGLUT or
GLUT32 should work.

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Comment By: Greg Hazel (ghazel)
Date: 2010-10-18 09:31

Message:
This is Windows 7 x64 with 64-bit Python. The PyOpenGL installer does not
work with 64 bit Python (no installers do. see:
http://bugs.python.org/issue6792 )

Instead I did: easy_install pyopengl


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Comment By: Mike C. Fletcher (mcfletch)
Date: 2010-10-18 09:27

Message:
You are missing GLUT, though why I can't say, as it is supposed to be
installed with PyOpenGL in the windows installer.

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Comment By: Greg Hazel (ghazel)
Date: 2010-10-06 07:13

Message:
I installed PIL, but I still get:

C:\Users\Greg\Downloads>shader_sphere.py
WARNING:OpenGL.arrays.numpymodule:Unable to load numpy_formathandler
accelerator from OpenGL_accelerate
Traceback (most recent call last):
  File "C:\Users\Greg\Downloads\shader_sphere.py", line 116, in <module>
    TestContext.ContextMainLoop()
  File
"C:\Python27\lib\site-packages\openglcontext-2.1.0a11-py2.7.egg\OpenGLContext\glutcontext.py",
line 154, in ContextMainLoop
    render = cls( *args, **named)
  File
"C:\Python27\lib\site-packages\openglcontext-2.1.0a11-py2.7.egg\OpenGLContext\glutcontext.py",
line 30, in __init__
    glutInitDisplayMode( self.DISPLAYMODE )
  File
"C:\Python27\lib\site-packages\pyopengl-3.0.1-py2.7.egg\OpenGL\platform\baseplatform.py",
line 340, in __call__
    self.__name__, self.__name__,
OpenGL.error.NullFunctionError: Attempt to call an undefined function
glutInitDisplayMode, check for bool(glutInitDisplayMode) before calling

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105988&aid=3081957&group_id=5988