54 lines
1.2 KiB
Lua
54 lines
1.2 KiB
Lua
--PICTURE: Pattern - Sierpinsky triangle v1.0
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--by Richard Fhager
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--http://hem.fyristorg.com/dawnbringer/
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-- Email: dawnbringer@hem.utfors.se
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-- MSN: annassar@hotmail.com
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--
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-- Copyright 2010 Richard Fhager
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--
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-- This program is free software; you can redistribute it and/or
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-- modify it under the terms of the GNU General Public License
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-- as published by the Free Software Foundation; version 2
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-- of the License. See <http://www.gnu.org/licenses/>
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-- This script was adopted from Evalion, a Javascript codecrafting/imageprocessing project
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-- http://goto.glocalnet.net/richard_fhager/evalion/evalion.html
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--
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frac = {{1,1},{1,0}}
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iter = 15
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--
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function pattern(x,y,p,n,i) -- Fractal Pattern V1.0 by Richard Fhager (mod allows for wrapping)
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py = #p
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px = #p[1]
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while ((p[1+math.abs(math.floor(y*py))%py][1+math.abs(math.floor(x*px))%px]) == 1 and n<i) do
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x=x*px-math.floor(x*px);
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y=y*py-math.floor(y*py);
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n = n+1
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end
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return 1 - n/i;
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end
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--
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w, h = getpicturesize()
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rp,gp,bp = getcolor(getforecolor())
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for y = 0, h - 1, 1 do
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for x = 0, w - 1, 1 do
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ox = x / w;
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oy = y / h;
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f = pattern(ox,oy,frac,0,iter);
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c = matchcolor(rp*f,gp*f,bp*f)
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putpicturepixel(x, y, c);
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end
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end
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