Hi Erik,
Erik Podetti wrote:
> Hi everybody. I'm experiencing a strange behaviour. If I render my FBO, the
> shader (SHL_CHUNK) associated to objects in the scene seems not to be able
> to extract the gl_FragCoord.z component.
> E.G. let's suppose I'm inside the fragment shader of an object inside the
> scene view from the FBO, if I want as gl_FragData[n] (output) the
> gl_FragCoord.z I get a saturated value of 1.0 or something similar. The
> strange thing is tha gl_FragCoord.x and gl_FragCoord.y are correct.
> If I "visualize" gl_FragCoord.w I get something like a " 1.0 -
> Zbuffer"....similar to a z-buffer but inverted (near objects are white and
> far ar black).
> But I think the "w" component is not just "1 - z".
> Can anybody please help me understanding how to extract the z value because
> I simply need to create a zbuffer to a texture
>
Check out
http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=234519
for some interesting info on gl_FragCoord.
Hope it helps
Dirk
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