JoN wrote:
I'm interested in the use of buffer objects in general, from pyopengl (so this
is more an opengl users list matter for me, forgive me).
Getting access to opengl buffer objects using ctypes is something I'm struggling
to get my head around, but there may be an even higher level way of doing it in
pygame??
You cannot get random access to texture buffer objects. Use
glTexImage2D (or variant) to supply the initial data, and
glTexSubImage2D to update it. ctypes is very flexible with what you can
pass as a 'void *' to these functions, for example, a string, list,
ctypes array will all work.
You can read back pixel data from a texture or buffer using
glReadPixels, but this is not a common operation.
Vertex buffer objects can be mapped into system memory: use glMapBuffer
to retrieve a 'void *' which you can then cast to a ctypes array of the
correct size.
Pygame has no helping functions for OpenGL buffers or textures.
Alex.
