Random number in GLSL?

[Rens]

Hi all,

Is there a function or another method in GLSL that will give me a different random number every time it is called?

Thanks!
Rens

[Rens]

.. with a uniform distribution? : )

[vlado]

I'm not sure, I have to check. What do you want to do with it?

Best regards,
Vlado

[Rens]

I want to query a gradient texture (u only) n times, but it has to work for both a high and low amount of samples, and that after a large amount of samples it would not be biased in any direction.
However I think I can use some kind of evenly spaced recursive subdivision so the sampling distances get smaller the more samples there are, that might actually be a better option! Or what would be a better way to get a good representation of a gradient with both a low and high number of samples?