Re: [PyOpenGL-Users] How to use shaders in pyopengl

[Mike C. F. <mcf...@vr...>]

Nicolas Brown wrote:
> Are there any examples on how to use shaders in pyopengl that actually 
> work, the test in pyopenglcontext doesnt work.
> I get an error;
> NullFunctionError: Attempt to call an undefined function 
> glShaderSourceARB, check for bool(glShaderSourceARB) before calling
> glShaderSource doesnt work either, i get the same error.I need an 
> example cuz i am tired of trying to find answers and not getting any.
Are you certain that your current context supports shaders?  You can see 
by running the following from the OpenGLContext/tests directory:

python glget.py | grep program

There are basically two possibilities, either your context doesn't 
support glShaderSource, or there's something wrong with PyOpenGL's 
handling of extensions on your platform (possibly Windows?)  I don't use 
Windows or OSX, so I rely on other people to report errors over there.  
As for a context that doesn't support the extensions, you'll see that if 
e.g. you have older hardware, or your drivers are very old (e.g. a stock 
install of Win2K) or for some reason your machine is running in 
software-mode rendering.

The shaderobject.py test just ran on my (Linux) workstation here, so the 
code should be reasonably close to working.

Good luck,
Mike

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