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Tristam MacDonald  
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 More options Nov 30 2008, 9:20 pm
From: "Tristam MacDonald" <swiftco...@gmail.com>
Date: Sun, 30 Nov 2008 21:20:20 -0500
Local: Sun, Nov 30 2008 9:20 pm
Subject: Re: pyglet + pyopengl

On Sun, Nov 30, 2008 at 8:29 PM, Carl Banks <pavlovevide...@gmail.com>wrote:

> A good library affects its caller's state as little as possible.  I
> definitely dropped the ball in this respect.  I'll make a note to
> preserve the enable flags in the next Dice3DS release.

> I'm not the biggest fan of pyglet (sorry) but maybe I'll also try to
> update the example code to accommodate Pyglet's OpenGL interface.
> Pyglet's built-in OpenGL calls are not as robust to all the different
> array types as PyOpenGL is, so the code would need to be careful to
> make sure arrays are contiguous and alignments correct.

I could be wrong, but my impression is that the arrays must be contiguous
and alignment must be correct to achieve any sort of performance - otherwise
PyOpenGL has to manually convert the array before sending it to OpenGL.

- Tristam

> Carl Banks

> On Nov 22, 5:33 am, Noyan Tokgozoglu <cladinapa...@gmail.com> wrote:
> > I solved it.

> > Turns out his code turned off GL_TEXTURE_2D. I enabled it within my
> > code after drawing the model, and everything got solved. Simple, eh?

> > On Nov 21, 9:56 pm, Noyan Tokgozoglu <cladinapa...@gmail.com> wrote:

> > > Actually, now that I look closely, the textures aren't gone, they are
> > > barely visible on distant objects... The loaded model looks fine
> > > though...
> > > Here is now it looks:

> > >http://i32.photobucket.com/albums/d7/thepicturesofnayon/bug.png

> > > On Nov 21, 9:44 pm, Noyan Tokgozoglu <cladinapa...@gmail.com> wrote:

> > > > First of all, I love pyglet, and I would never want to use pyopengl.

> > > > However, I need to load 3ds files. And this person wrote some code to
> > > > load 3ds files (
> http://www.aerojockey.com/software/dice3ds/index.html
> > > > ), which requries pyopengl to put it into a display list easily.

> > > > I tried to modify his code to work with pyglet, and after lots of
> > > > ctypes pain and dozens of segfaults, I gave up.

> > > > Now I just run pyglet and pyopengl together. However, if I import
> > > > pyglet first, pyopengl gives an error while importing, saying:

> > > > Traceback (most recent call last):
> > > >   File "interpolator.py", line 30, in <module>
> > > >     from Dice3DS.example import glmodel, gltexture
> > > >   File "C:\Python25\lib\site-packages\Dice3DS\example\glmodel.py",
> > > > line 11, in <
> > > > module>
> > > >     from Dice3DS.example import basicmodel, gltexture
> > > >   File "C:\Python25\lib\site-packages\Dice3DS\example\gltexture.py",
> > > > line 14, in
> > > >  <module>
> > > >     from OpenGL.GLU import *
> > > >   File
> "c:\python25\lib\site-packages\PyOpenGL-3.0.0b6-py2.5.egg\OpenGL
> > > > \GLU\__in
> > > > it__.py", line 10, in <module>
> > > >     from OpenGL.GLU.glunurbs import *
> > > >   File
> "c:\python25\lib\site-packages\PyOpenGL-3.0.0b6-py2.5.egg\OpenGL
> > > > \GLU\glun
> > > > urbs.py", line 147, in <module>
> > > >     cb = _callbackWithType( funcType )
> > > >   File
> "c:\python25\lib\site-packages\PyOpenGL-3.0.0b6-py2.5.egg\OpenGL
> > > > \GLU\glun
> > > > urbs.py", line 140, in _callbackWithType
> > > >     simple.gluNurbsCallback
> > > >   File
> "c:\python25\lib\site-packages\PyOpenGL-3.0.0b6-py2.5.egg\OpenGL
> > > > \platform
> > > > \baseplatform.py", line 192, in copyBaseFunction
> > > >     extension = original.argNames,
> > > >   File
> "c:\python25\lib\site-packages\PyOpenGL-3.0.0b6-py2.5.egg\OpenGL
> > > > \platform
> > > > \baseplatform.py", line 134, in createBaseFunction
> > > >     extension = extension,
> > > >   File
> "c:\python25\lib\site-packages\PyOpenGL-3.0.0b6-py2.5.egg\OpenGL
> > > > \platform
> > > > \baseplatform.py", line 80, in constructFunction
> > > >     if extension and not self.checkExtension( extension ):
> > > >   File
> "c:\python25\lib\site-packages\PyOpenGL-3.0.0b6-py2.5.egg\OpenGL
> > > > \platform
> > > > \baseplatform.py", line 158, in checkExtension
> > > >     current = set.get( name )
> > > > TypeError: list objects are unhashable

> > > > And if I try to import pyopengl first, it works, however all my
> > > > textures are gone, and only the textures of the imported model are
> > > > displayed.

> > > > So help me pelase! How can I make the two opengl libraries work
> > > > together? Or should I really try to modify his code harder? The
> > > > problem I've had with his code is basically related to (I think)
> > > > glVertexPointer, numpy ndarrays and the fact that pyglet expects
> > > > glfloats. However, I searched a lot on this and kept getting crashes
> > > > that looked like segfaults. So I'd appreciate it if you could please
> > > > focus on making pyopengl and pyglet working together instead of
> > > > solving this issue.

> > > > Thanks!


 
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