XOR RGB Sliding

xor-rgb-play.py

power = 9
size = 2**power

scenario = [
  # scene 0
  (size, lambda i, x, y: ((x+i)%size, x,          (x-i)%size), 
         lambda i, x, y: (y,          (y+i)%size, (y-i)%size)),
  # scene 1
  (size, lambda i, x, y: ((x-i)%size, (x-i)%size, x), 
         lambda i, x, y: (y,          (y+i)%size, (y+i)%size)),
  # scene 2
  (size, lambda i, x, y: ((x+i)%size, (x+i)%size, x), 
         lambda i, x, y: ((y-i)%size, y,          (y-i)%size)),
  # scene 3
  (size, lambda i, x, y: ((x+i)%size, x,          (x+i)%size), 
         lambda i, x, y: (y,          (y+i)%size, (y-i)%size)),
  # scene 4
  (size, lambda i, x, y: ((x-i)%size, (x+i)%size, x), 
         lambda i, x, y: (y,          (y+i)%size, (y-i)%size)),
  # scene 5
  (size, lambda i, x, y: ((x+i)%size, (x-i)%size, x), 
         lambda i, x, y: ((y+i)%size, y,          (y-i)%size)),
]

colors = 256

if power <= 7:
  norm_coef = colors // size
  norm = lambda x: (x[0]*norm_coef, x[1]*norm_coef, x[2]*norm_coef)
elif power == 8:
  norm = lambda x: x
elif power >= 9:
  norm_coef = size // colors
  norm = lambda x: (x[0]/norm_coef, x[1]/norm_coef, x[2]/norm_coef)

def xor3(x, y):
  return (x[0]^y[0], x[1]^y[1], x[2]^y[2])

from PIL import Image
image = Image.new("RGB", (size, size), 0)
pix = image.load()
frameno = 0
for sceneno, scene in enumerate(scenario):
  frames, getx, gety = scene
  for i in xrange(frames):
    print "scene #", sceneno, "frame #", i
    for x in xrange(size):
      for y in xrange(size):
        pix[x, y] = norm(xor3(getx(i, x, y), gety(i, x, y)))
    image.save("xor-play-%d-%04d.png"%(power, frameno), "png")
    frameno += 1