ATI - GL_CLIP_DISTANCE0 - Bug

[kyle_]

Yeah. That would be good enough (its also what im saying, you would get undefined result when you statically use the variable but don't actually write to it).

Also note, how GL actually works that way in some cases - gl_FragDepth kinda works like that.

[l_belev]

You are right for gl_FragDepth it's an exception from the undefined "rule".
So it appears we already have exceptions anyway. Well, in that case.. i cancel my objections

[McNopper]

In the mentioned example, I still write to the clip distance. But by disabling the clipping, I would expect - as written in the specs - that no clipping is done.