In article <3da4655f@news.povray.org>, "Slime" <slm### [at] slimelandcom> 
wrote:

> After thinking about this a bit, I realize that there are occasional
> instances where it's useful to have 4D noise in a still image. Mainly, you
> might be creating a function which relies on the random noise function
> twice. It needs two similar random noise functions, but they can't be
> identical. (Perhaps you're creating a 3D vector with 3 functions, one for x,
> one for y, one for z, which you normalize. Perhaps you're simulating
> turbulence somehow. Maybe you just want to see what noise1() + noise2()
> turns out to be.) By taking different slices of the 4D noise function, you
> can get these two similar noise functions that aren't identical.

4D noise will be slower to compute than 3D noise. I think a better 
solution for this case would be to allow a seed to be specified for the 
individual noise generators.
With my "dream syntax", random number generators and noise generators 
would have a syntax closer to a pigment/pattern function, and you could 
specify any number of customized ones with different parameters.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

Post a reply to this message