32 lines
917 B
Lua
32 lines
917 B
Lua
--BRUSH Distortion: FishEye
|
|
--by Richard Fhager
|
|
--http://hem.fyristorg.com/dawnbringer/
|
|
|
|
-- Copyright 2010 Richard Fhager
|
|
--
|
|
-- This program is free software; you can redistribute it and/or
|
|
-- modify it under the terms of the GNU General Public License
|
|
-- as published by the Free Software Foundation; version 2
|
|
-- of the License. See <http://www.gnu.org/licenses/>
|
|
|
|
-- This script was adopted from Evalion, a Javascript codecrafting/imageprocessing project
|
|
--http://goto.glocalnet.net/richard_fhager/evalion/evalion.html
|
|
|
|
w, h = getbrushsize()
|
|
|
|
|
|
for y = 0, h - 1, 1 do
|
|
for x = 0, w - 1, 1 do
|
|
|
|
ox = x / w;
|
|
oy = y / h;
|
|
v = (math.cos((ox-0.5)*math.pi)*math.cos((oy-0.5)*math.pi))*0.85;
|
|
ox = (1 + ox - (ox-0.5)*v) % 1;
|
|
oy = (1 + oy - (oy-0.5)*v) % 1;
|
|
|
|
c = getbrushbackuppixel(math.floor(ox*w),math.floor(oy*h));
|
|
putbrushpixel(x, y, c);
|
|
end
|
|
end
|
|
|