Hide button: inverted right and left clicks. Fixed credits. Lua: arguments of MatchColor and SetColor are now automatically clamped on 0 and 255 when they are too small or too big, instead of wrapping.

git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1321 416bcca6-2ee7-4201-b75f-2eb2f807beb1

scripts/dawnbringer1.lua

@@ -0,0 +1,64 @@
+-- Picture scene: Amigaball (by Richard Fhager, code adopted from Evalion)
+
+w = 256
+h = 256
+
+setpicturesize(w,h)
+
+
+-- Set Amiga Palette
+
+colors = {}
+
+for c = 0, 63, 1 do
+ colors[c+1] = {c*4,0,0}
+end
+
+for c = 0, 63, 1 do
+ colors[c+65] = {255,c*4,c*4}
+end
+
+for c = 0, 63, 1 do
+ colors[c+129] = {255-c*4,255-c*4,255-c*4}
+end
+
+for c = 1, #colors, 1 do
+ setcolor(c-1,colors[c][1],colors[c][2],colors[c][3]) 
+end
+
+
+-- Make Amiga ball
+
+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
+
+   c = matchcolor(r,g,b)
+ 
+   putpicturepixel(x, y, c);
+
+  end
+end