On 7/30/07, Martin Lütke <[EMAIL PROTECTED]> wrote: > It uses a chaotic function (ergodic?) that works on integers. In the case of > Terrain it uses 2. One for the x and one for y coordinate. It should be > infinite > for Zooming out. When zooming in one uses interpolation. The drawback(?) is > when > zooming out is that it becomes more "noisy".
Typically you'd sum different 'octaves' of noise to get a function that's approximately self-similar under scaling, that way it'd be qualitatively similar when zooming in or out. There are many descriptions on the web. Here's one I found: http://local.wasp.uwa.edu.au/~pbourke/texture_colour/perlin/ -- Dan _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
