[PyOpenGL-Users] Using framebuffers

[Uğur G. <ugu...@gm...>]

Dear Pyopengl users,

I am a beginner who studies OpenGL using PyOpenGL. I want to learn
post-processing effects and as the first step I want to be able to render a
scene into a FBO and then render that FBO on a quad that cover the whole
screen.

The python code I am running is this:
https://gist.github.com/vug/2c7953d5fdf750c727af249ded3e9018 I combined
parts from several tutorials I found on the internet.

I suspect that nothing is written to the texture of FBO. Sometimes I have a
solid black window, and sometimes there are random noise at some parts of
the window (probably this happens when texture buffer is not filled with
zeros).

I am using Python 3.5.0
numpy==1.11.0
PyOpenGL==3.1.0
PyOpenGL-accelerate==3.1.0

I appreciate if anyone can direct me on how to render on an offscreen
framebuffer via PyOpenGL.

Regards,
ugur