POV-Ray: Newsgroups: povray.advanced-users: how does the "one over f" fractal noise function work?: Re: how does the "one over f" fractal noise function work?

POV-Ray : Newsgroups : povray.advanced-users : how does the "one over f" fractal noise function work? : Re: how does the "one over f" fractal noise function work?		Server Time 30 Jul 2024 06:18:53 EDT (-0400)

From: Ken
Date: 7 Feb 2000 02:04:08
Message: <389E6E4C.87C8ACD9@pacbell.net>

Jeff Daniels wrote:
> 
> I want to put objects in 3-D space according to the same "1/f fractal
> noise" pattern that's used in granite textures. But I don't know the
> math behind 1/f fractal noise, and I can't find anywhere on the net that
> discusses it without assuming that I already understand it completely.
> Can someone explain to me how, given an x,y,z point, I would use a 1/f
> fractal noise function to compute the [ size | color | orientation ] of
> the object at that point?

You will find a very comprehensive discussion on noise patterns at
Hugo Elias' site and he uses POV-Ray as an example of how it is
implemented -

http://freespace.virgin.net/hugo.elias/models/m_perlin.htm

-- 
Ken Tyler -  1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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