| 0,0 → 1,57 |
|---|
| --BRUSH Scene: Amigaball 1.0 |
| -- |
| --Draws the famous 'Amiga ball' in the brush. |
| -- |
| --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() |
| if (w<64 or h<64) then |
| setbrushsize(64,64) |
| w=64 |
| h=64 |
| end |
| |
| for y = 0, h - 1, 1 do |
| for x = 0, w - 1, 1 do |
| |
| -- Fractionalize image dimensions |
| ox = x / w; |
| oy = y / h; |
| |
| -- Ball |
| Xr = ox-0.5; Yr = oy-0.5; |
| W = (1 - 2*math.sqrt(Xr*Xr + Yr*Yr)); |
| |
| -- 'FishEye' distortion / Fake 3D |
| F = (math.cos((ox-0.5)*math.pi)*math.cos((oy-0.5)*math.pi))*0.65; |
| ox = ox - (ox-0.5)*F; |
| oy = oy - (oy-0.5)*F; |
| |
| -- Checkers |
| V = ((math.floor(0.25+ox*10)+math.floor(1+oy*10)) % 2) * 255 * W; |
| |
| -- Specularities |
| SPEC1 = math.max(0,(1-5*math.sqrt((ox-0.45)*(ox-0.45)+(oy-0.45)*(oy-0.45)))*112); |
| SPEC2 = math.max(0,(1-15*math.sqrt((ox-0.49)*(ox-0.49)+(oy-0.48)*(oy-0.48)))*255); |
| |
| r = W * 255 + SPEC1 + SPEC2 |
| g = V + SPEC1 + SPEC2 |
| b = V + SPEC1 + SPEC2 |
| |
| putbrushpixel(x, y, matchcolor(r,g,b)); |
| |
| end |
| end |