Re: [PyOpenGL-Users] glGenBuffers on Windows XP and Intel 82855

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

Ontje Lünsdorf wrote:
> Hi,
>
> I'm trying to use vertex buffer object on a laptop with an intel 82855 graphic 
> chipset. GL_EXTENSIONS contains GL_ARB_vertex_buffer_object and GLView reports 
> that the glGenBuffers function should be available.
> If I try to call the function PyOpenGL will raise the a NullFunctionError. 
> However if I don't specify the buffer count PyOpenGL will complain about a 
> missing argument for that function.
> The same code runs without any problems on a machine with a nvidia card.
>
> Is this a PyOpenGL, driver bug or am I missing something?
>   
Are you calling glGenBuffersARB, or glGenBuffers ?  Your driver likely 
only provides the extension-based entry point (the one with the ARB 
suffix).  See the OpenGL/arrays/vbo.py module for some code showing use 
of the "alternate" function to make using promoted extensions easier.  
Oh, it also provides a basic VBO wrapper as an array data-type.

HTH,
Mike

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