Thank you Ian ! I just tried it and glReadPixels does the job ! However it clearly slows down the rendering loop...
Probably because it is a copy operation, is there not a direct access method to the pixels data ? Sorry for my ignorance of OpenGL, I guess I would find a good book on it ! Nicolas On 12 nov, 16:11, Ian Mallett <geometr...@gmail.com> wrote: > Hi, > > What you want to do, you can't do the same way. What you'll need to do is > copy the rendered pixels back from the graphics card with glReadPixels(...), > or a similar method. > > Ian
