Re: [PyOpenGL-Users] error using GL_MAX_TEXTURE_BUFFER_SIZE_ARB

[Alejandro S. <as...@gm...>]

Hello Mab,

I am currently using PyOpenGL on a Windows 7 x64 machine and I haven't run
into these issues. I am not using GLUT though, I create my OpenGL context
using Qt.

Those "NoneType is not callable" errors lead me to believe that for some
reason the OpenGL functions are not being linked into your program. This
should happen automagically when you create an OpenGL context (at least this
is the case for me using Qt on a NVIDIA driver).

Have you tried using a different mechanism to create your window? pygame is
really simple, just call pygame.display.set_mode((w,h), pygame.OPENGL |
pygame.DOUBLEBUF).

Alejandro.-

On Tue, Jul 5, 2011 at 10:49 PM, Belzile Marc-André <ma...@ho...>wrote:

>  Hi,
>
> anyone knows what's going on ? I supsect my pyopengl installation is not
> adequate. So here are the instructions I used to install pyopengl 3.0.1:
>
> python.exe setup.py build
> python.exe setup.py install
>
> However this doesn't seem to do the job:
>
> C:\Users\mab\Downloads\PyOpenGL-3.0.1 (1)\PyOpenGL-3.0.1\tests>python
> test_glutinit.py
> Traceback (most recent call last):
>   File "test_glutinit.py", line 18, in <module>
>     glutInit([])
>   File "c:\Python27\lib\site-packages\OpenGL\GLUT\special.py", line 323, in
> glutInit
>     _base_glutInit( ctypes.byref(count), holder )
> TypeError: 'NoneType' object is not callable
>
> I'm sure I'm missing something obvious. Is there any more magic involved
> for installing pyopengl on win64 ?
>
> I was able to install the win64 package available here
> http://www.lfd.uci.edu/~gohlke/pythonlibs/ but I still get the error for GL_MAX_TEXTURE_BUFFER_SIZE_ARB
> .
>
> thanks for your help
>
> -mab
>
>
> ------------------------------
> From: ma...@ho...
> To: as...@gm...
> Date: Tue, 5 Jul 2011 09:55:04 -0400
>
> CC: pyo...@li...
> Subject: Re: [PyOpenGL-Users] error using GL_MAX_TEXTURE_BUFFER_SIZE_ARB
>
>  Hi,
>
> yes I did. Here's the full code I'm using:
>
> """Log opengl info for this machine"""
>
> from OpenGL.GL import *
> from OpenGL.GLUT import *
> from OpenGL.GL.ARB.texture_buffer_object import *
>
>
> def InitGL(Width, Height):
> glClearColor(0.0, 0.0, 0.0, 0.0)
>  glMatrixMode(GL_PROJECTION)
>  glLoadIdentity()
> glMatrixMode(GL_MODELVIEW)
>
>
> def log_opengl_info():
>   ver = glGetString( GL_VERSION )
>   ven = glGetString( GL_VENDOR )
>   ren = glGetString( GL_RENDERER )
>
>   print 'vendor: %s\nopenl version: %s\nrenderer: %s\nsupported
> extensions:' % (ven,ver,ren)
>   #print '\n'.join( glGetString( GL_EXTENSIONS ).split(' ') )
>
> print 'OpenGL.GL.ARB.texture_buffer_object %d\n' %
> glInitTextureBufferObjectARB()
>  print glGetIntegerv( GL_MAX_TEXTURE_BUFFER_SIZE_ARB )
>
> def render():
>  glClear(GL_COLOR_BUFFER_BIT)
>  glLoadIdentity()
> log_opengl_info()
>
> window = None
> def main():
> global window
>  glutInit(sys.argv)
>  glutInitDisplayMode(GLUT_RGBA)
>
>  glutInitWindowSize(10, 10)
>
> glutInitWindowPosition(0, 0)
>
> window = glutCreateWindow('log opengl info')
>
> glutDisplayFunc(render)
>
> # Initialize our window.
>  InitGL(10, 10)
>
> # Start Event Processing Engine
>  glutMainLoop()
>
>
> if __name__ == "__main__":
>     main()
>
>
> ------------------------------
> From: as...@gm...
> Date: Tue, 5 Jul 2011 10:14:14 -0300
> Subject: Re: [PyOpenGL-Users] error using GL_MAX_TEXTURE_BUFFER_SIZE_ARB
> To: ma...@ho...
> CC: pyo...@li...
>
> Hi Mab,
>
>  Hi,
>
> using GL_MAX_TEXTURE_BUFFER_SIZE_ARB ends up with an error
>
>
>
> Have you tried creating a window with an OpenGL context before trying to
> call glGetIntegerv?
>
> Alejandro.-
>
> --
> http://alejandrosegovia.net
>
>
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