Reorganized scripts, fixed 'memory' not working with subdirectories

git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1765 416bcca6-2ee7-4201-b75f-2eb2f807beb1

share/grafx2/scripts/samples_2.3/demo/brush/Amigaball.lua

@@ -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