Posted 21 September 2001 - 11:51 AM
Anyone know of a good way to determine the area of a polygon in pixels when the camera is looking straight at the polygon? Of course, the distance from the camera would have an effect.
I''ve tried just rendering the polygon and then using glReadPixels, but I''m having problem with it because somehow, it''s not reading back the rendered polygon (instead it gives me basically a snapshot of my desktop as viewed from the window).
I''ve also looked into feedback mode, but it seems to only return vertex information (it would be helpful if it actually returned rendered pixels.)
Anyone know of a good, accurate way of determining this?