Oh no... don't tell me I've inadvertantly started a "what is a fractal" holy
war... *wink*

Andrew.

(Let's just accept that there is no accepted definition ;-)

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Andrew Coppin <orp### [at] btinternetcom> wrote:
> (Let's just accept that there is no accepted definition ;-)

  I think that's a wrong statement.

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

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On Mon, 12 May 2003 12:20:45 -0400, Christopher James Huff
<cja### [at] earthlinknet> wrote:

>Perlin noise is not self-similar at different scales, though. It is 
>self-similar at one scale only.
>Now, things like sum 1/F-noise are fractal. (wrinkles, granite)

You're right, of course. Perhaps I should have specified that some of
the patterns in POV that implement Perlin noise use it in 1/F fractal
noise implementations. Nitpick :)


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

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