forked from KolibriOS/kolibrios
32 lines
917 B
Lua
32 lines
917 B
Lua
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--BRUSH Distortion: FishEye
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--by Richard Fhager
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--http://hem.fyristorg.com/dawnbringer/
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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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w, h = getbrushsize()
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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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v = (math.cos((ox-0.5)*math.pi)*math.cos((oy-0.5)*math.pi))*0.85;
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ox = (1 + ox - (ox-0.5)*v) % 1;
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oy = (1 + oy - (oy-0.5)*v) % 1;
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c = getbrushbackuppixel(math.floor(ox*w),math.floor(oy*h));
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putbrushpixel(x, y, c);
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end
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end
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