Am 15.06.2013 um 10:40 schrieb Henri Verbeet <hverb...@gmail.com>:
> Why is this needed? When end == start I'd expect (end - c) / (end -
> start) to evaluate to +/-INF, and then get clamped to [0, 1], which is
> pretty much what you'd want. In my (very limited) testing, that's also
> what actually happens with at least the GLSL backend.
When I looked at the same problem back in 2007, the GL fixed function pipeline
disabled fog when start == end. Admittedly I did not re-test that assumption.
I'll have a look at it later today.
