In article <38B3B2DA.DB38919D@pacbell.net>, lin### [at] povrayorg 
wrote:

> Actually I wasn't thinking of just any pattern type.
> 
> For example - turbulence 0.25 bozo - was not what I had in mind though
> it does present some interesting possiblities.
> 
> Instead I was thinking something more along the lines of
> 
> turbulence 0.25 ramp_wave
> 
> With this type of predefined turbulence modifier the octaves etc. should
> work as they do now. The real problem is that I am probably thinking two
> dimensionally and this may be impossible to implement in a 3D pattern.

The "waveforms" are 1 dimensional-a value goes in, gets changed a bit, 
and comes back out. When the two sets of values are graphed, they form 
different waveforms. I think of it as an equivalent to certain types of 
filters in electronics.
Maybe something I was thinking about when trying to come up with ways to 
make blurred reflections/transparence directional would be useful: a 
"tri-pattern", consisting of 3 patterns each with an optional waveform 
modifier(which is actually part of the pattern in the source) and a 
multiplier(or maybe two numbers indicating a range for the pattern), one 
for each dimension. A triangle wave turbulence would pe something like 
this: turbulence 0.25 < solid 0 0, gradient x 1, solid 0 0>(notice that 
this uses my solid pattern). I had abandoned this idea since it would 
require evaluating 3 different patterns for every point(possibly slowing 
things down) and would probably be difficult to control.

Maybe we just need a turbulence family of warps, each of them being a 
variation of turbulence.

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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