Script contest entries.

git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1296 416bcca6-2ee7-4201-b75f-2eb2f807beb1

scripts/Downbringer1.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(math.max(0,math.min(255,r)),math.max(0,math.min(255,g)),math.max(0,math.min(255,b)))
+ 
+   putpicturepixel(x, y, c);
+
+  end
+end

scripts/Downbringer2.lua

@@ -0,0 +1,21 @@
+-- Picture distortion: Sine
+
+w, h = getpicturesize()
+
+frq = 2
+amp = 0.3
+
+
+for y = 0, h - 1, 1 do
+  for x = 0, w - 1, 1 do
+
+    ox = x / w;
+    oy = y / h;
+    ox = (1 + ox + math.sin(oy*math.pi*frq)*amp) % 1;
+   
+    c = getbackuppixel(math.floor(ox*w),y);
+    --c = y % 16
+    putpicturepixel(x, y, c);
+
+  end
+end

scripts/nitrofurano1.lua

@@ -0,0 +1,6 @@
+-- x1palettetopicture.lua
+w,h=getpicturesize();
+for y1=0,7,1 do
+  for x1=0,31,1 do
+    putpicturepixel(x1,y1,y1+x1*8)
+    end;end

scripts/nitrofurano2.lua

@@ -0,0 +1,8 @@
+-- x8palettetopicture.lua
+w,h=getpicturesize();
+for y1=0,7,1 do
+  for x1=0,31,1 do
+    for y2=0,7,1 do
+      for x2=0,7,1 do
+        putpicturepixel(x1*8+x2,y1*8+y2,y1+x1*8)
+        end;end;end;end

scripts/nitrofurano3.lua

@@ -0,0 +1,10 @@
+-- drawgrid8x8.lua
+w,h=getpicturesize();
+for y=0,h-1,1 do
+  for x=0,w-1,8 do
+    putpicturepixel(x,y,1);
+    end;end
+for y=0,h-1,8 do
+  for x=0,w-1,1 do
+    putpicturepixel(x,y,1);
+    end;end

scripts/nitrofurano4.lua

@@ -0,0 +1,11 @@
+-- drawgrid8x8matchcolor.lua
+w,h=getpicturesize();
+c=matchcolor(0xFF,0x00,0x00)
+for y=0,h-1,1 do
+  for x=0,w-1,8 do
+    putpicturepixel(x,y,c);
+    end;end
+for y=0,h-1,8 do
+  for x=0,w-1,1 do
+    putpicturepixel(x,y,c);
+    end;end

scripts/nitrofurano5.lua

@@ -0,0 +1,10 @@
+-- drawisometricgrid.lua
+w,h=getpicturesize();
+for y=0,h-1,8 do
+  for x=0,w-1,1 do
+    putpicturepixel(x,y+(x/2)%8,1);
+    end;end
+for y=0,h-1,8 do
+  for x=0,w-1,1 do
+    putpicturepixel(x+3,y+7-((x/2)%8),1);
+    end;end

scripts/nitrofurano6.lua

@@ -0,0 +1,9 @@
+-- 12bitcolourspacefrompalette.lua
+w,h=getpicturesize();
+for y1=0,3,1 do
+  for x1=0,3,1 do
+    for y2=0,15,1 do
+      for x2=0,15,1 do
+        putpicturepixel(x1*16+x2,y1*16+y2,matchcolor((y2*255)/15,
+((y1*4+x1)*255)/15,(x2*255)/15))
+        end;end;end;end

scripts/nitrofurano7.lua

@@ -0,0 +1,9 @@
+-- 15bitcolourspacefrompalette.lua
+w,h=getpicturesize();
+for y1=0,3,1 do
+  for x1=0,7,1 do
+    for y2=0,31,1 do
+      for x2=0,31,1 do
+        putpicturepixel(x1*32+x2,y1*32+y2,matchcolor((y2*255)/31,
+((y1*8+x1)*255)/31,(x2*255)/31))
+        end;end;end;end

scripts/nitrofurano8.lua

@@ -0,0 +1,9 @@
+-- 18bitcolourspacefrompalette.lua
+w,h=getpicturesize();
+for y1=0,7,1 do
+  for x1=0,7,1 do
+    for y2=0,63,1 do
+      for x2=0,63,1 do
+        putpicturepixel(x1*64+x2,y1*64+y2,matchcolor((y2*255)/64,
+((y1*8+x1)*255)/64,(x2*255)/64))
+        end;end;end;end