Re: [PyOpenGL-Users] glGenBuffers problem

[Mike C. F. <vrp...@gm...>]

On 11-11-06 11:31 AM, Maximiliano Guerra wrote:
> Hi all, this is my first message in this list. Nice to meet you all.
>
> I just started learning Computer Graphics. I'm studying in
> the http://www.arcsynthesis.org/gltut
> It is very good for graphics concepts as well opengl, their code is in
> c++ but I'm wanting to do it with python.
>
> So I'm tring to do the first tutorial (you can find the code
> here: bitbucket.org/alfonse/gltut
> <http://bitbucket.org/alfonse/gltut>) step by step and I ran in some
> problems with glGenBuffers.
>
> In [1]: from OpenGL.GL import *
>
> In [2]: buf = glGenBuffers(1)
> NullFunctionError: Attempt to call an undefined function glGenBuffers,
> check for bool(glGenBuffers) before calling
...

Your code is attempting to call OpenGL-context requiring code without an
OpenGL context (window).  Do the glGenBuffer and similar calls within a
draw callback of your windowing system (e.g. GLUT).  You may also need
to verify that your machine has a reasonably recent video card that
supports modern OpenGL (but most do these days).

HTH,
Mike

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com