[PyOpenGL-Users] VBOs and gl*Pointer offset parameter

[renaud b. <rnd...@gm...>]

hello,

i start to experiment with VBOs to prepare some code to the future of opengl :)
i try to use a single array buffer to store a bunch of vertices and
then the associated colors.
as far as i understand, i should then use the last parameter of the
usual gl[Vertex|Color]Pointer to pass the offset of the first element
inside the array.
for the vertices, it's 0, so i can pass None (the c functions expect a
void* parameter).
the problem is for non-zero offsets, e.g. for the colors in this case.
it seems that the python wrapper interprets the last parameter as an
array, and i have not found a way to pass an offset without
"dewrapping" the function, i.e.

offset = 12
glColorPointer.wrappedOperation(3, GL_FLOAT, 0, offset) # works
glColorPointer(3, GL_FLOAT, 0, any_thing_i_could_think_of(offset)) #
doesn't work

i've tried several any_thing_i_could_think_of functions (casting to
c_void_p, etc.) with no luck.
any advice ?

i've started looking into pyopengl code to see if the  wrapper could
be made more "clever" by distinguishing array-like and offset-like use
of the last parameter but i need some time to fully understand the
wrapping of the pointer functions.

thanks for any advice,

renaud