Re: [PyOpenGL-Users] glVertexAttribPointer(); loading platform-specific functions

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

Ian Mallett wrote:
> On Thu, Aug 13, 2009 at 7:38 AM, Paulo Silva <nit...@gm...
> <mailto:nit...@gm...>> wrote:
>
>     > vertexBufferObject = vbo.VBO(...)
>     > gl.glVertexAttribPointer(positionLocation, 3, GL_FLOAT, False, 24,
>     > vertexBufferObject)
>     >
>     > The second line generates this error:
>     >
>     > ctypes.ArgumentError: argument 6: <type 'exceptions.TypeError'>:
>     > Don't know how to convert parameter 6
>
> You might try this code, adapted from my code, which makes use of
> vertex attributes for normal mapping:
>
> vertex_attrib_vbo.bind()
> glVertexAttribPointer(location,4,GL_FLOAT,GL_FALSE,0,None)
Yup, that should work, even with the raw ctypes APIs.

> The last argument could probably also be 0. 
0 would be interpreted as a 1-element array of integers.  You can (with
a bug-fix introduced for 3.0.1) do ctypes.c_void_p( 0 ) if you want to,
though.

HTH,
Mike

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