Need some help on glfeedbackbuffer

How could I use (if I can) the glfeedbackbuffer to calculate the screen pixel coverage ?

Hi !

I think it would be faster to copy the frame buffer to ram and calculate it from their.

But it would be slow either way, what do you need it for ?


I’ve readed a suggestion by Luke H. about this on flipcode site. I’ve realizede an octree structure. The point now is how to reduce the number of the polygons of the visible nodes. He suggested to use glfeedbackbuffer to support the c-buffer (any suggestion or link about this last are welcome) …