gl_FragDepth problem

[Little Atuin]

I've run into problems when trying to set the depth of a fragment using gl_FragDepth.
My aim is to offset the object to the front a bit while using a depthtest, as to achieve a 'band' similar as one would use polygon_offset.

However, gl_FragDepth behaves very strangely.
It renders ok when we would write:

gl_FragDepth = gl_FragCoord.z;

and it EVEN COMPILES AND RUNS when I say:

gl_FragDepth = gl_FragCoord.z + 1; // SHOULD GENERATE TYPE CAST ERROR

When I use:

gl_FragDepth = a;

with a between (0.0, 1.0) :-) gives always the _same_ erroneous depthmap.

I got this strange behaviour under linux (driver 61.11) using a GeForce FX 5200.

thnx

[-NiCo-]

I'm having the same problem on a gf6800 GT / winXP combination.

It appears that setting gl_FragDepth has no effect at all.

Nico

[Tom Nuydens]

I'm on version 61.77 (win2k), same problem. I experienced it on GeForce FX as well as on 6800. Maybe it only happens in Belgium, though? :)

I'll contact NVidia and see if/when we can expect a fix.

-- Tom

[Tom Nuydens]

I've just installed 66.00, and the problem no longer seems to occur.

-- Tom

[-NiCo-]

Yep, everything seems to work fine now.
Thanks for the tip Tom :)

Nico

[Little Atuin]

That indeed is excellent news!
Is there any timeframe on when this fix would be available in the linux drivers?