In article <395B382C.6739148A@iname.com>, Jerome <ber### [at] inamecom> 
wrote:

> > Anyway, this looks like it would be better implemented as a pattern
> > waveform...it sounds like it will work for any values in the 0-1 range.
> 	In fact it works with anything in the minus infinity - plus
> infinity range, which is exactly the point since it's used
> to bring the values that are outside the 0-1 range inside
> it.

What is the exact math you are using? I am interested in adapting this 
as a waveform...there are a few other patterns that could use something 
like this. My blob pattern for instance.


> PS2: Does anybody know why the original noise was clipped
> rather than being scaled (like Nathan did) or any other
> continuous transform? My guess (and it *is* just a guess, I
> haven't got a scrap of evidence) would be that it was to
> ensure a reasonably even distribution (and anyway the
> clipping wasn't really a problem for the bozo pigment...)

My guess is that they didn't know how much it went out of range, and 
just used clipping as a temporary workaround. Or they didn't notice it 
went out of range until it was already released...it mostly shows up in 
fine-tuned textures, height fields, and isosurfaces. Too bad...it has 
certainly caused enough trouble since then. :-(

-- 
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://homepage.mac.com/chrishuff/
TAG Web page: http://tag.povray.org/

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