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93 lines
2.8 KiB
Python
93 lines
2.8 KiB
Python
#!/usr/bin/python
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"""
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An elementary 2D celluar automata implementation for the ledbar in brmlab.
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For some fun rules, try:
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30: near-random behavior
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22: gives a symmetric triangle pattern. It just looks like splitting cells and gets
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empty quickly, though.
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142: neat waves
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73: provides a downwards pattern with some fixed columns.
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51: likes to blink.
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The color mode encodes individual bits into, well, colors. Not too exciting,
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but sure more colorful.
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You can choose between a single pixel or a random starting row.
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By setting TOTALISTIC to True and adding proper rules, you get continuous
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totalistic 1D celluar automata. The basic rule mostly just fades out and
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in again: it looks like triangles on a plane. But tell me if you find some
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more interesting rule!
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The RULE format for totalistic automta is a dictionaries of functions which get
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passed the sum of the above three pixels. The keys are conditions, if one
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returns true, the value is executed. (Thus they shouldn't overlap.)
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Possible fun stuff: Automatically pick new rules, detect patterns and restart.
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"""
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import sys
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import random
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from ledbar import Ledbar
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PIXELS = 20
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PIXEL_MODE = ('bw', 'color')[0]
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START = ('single', 'random')[1]
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TOTALISTIC = True
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#RULE = 30
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RULE = {(lambda t: True): (lambda t: (t+0.9) % 1)}
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SLEEP = 25
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WIDTH = PIXELS
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if PIXEL_MODE == 'color': WIDTH *= 3
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def bits(num, align=8):
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for i in range(align)[::-1]:
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yield bool(num & (1 << i))
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if not TOTALISTIC:
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rules = dict(zip(((1,1,1), (1,1,0), (1,0,1), (1,0,0), (0,1,1), (0,1,0), (0,0,1), (0,0,0)), bits(RULE)))
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iteration = [0]*WIDTH
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if START == 'single':
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iteration[WIDTH//2] = 1
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elif START == 'random':
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iteration = list((random.randint(0, 1) if not TOTALISTIC else random.random()) for i in iteration)
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def iterate(iteration):
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new = []
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iteration.insert(0, 0)
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iteration.append(0)
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for i in xrange(len(iteration)):
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if 0 < i < len(iteration)-1:
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top = (iteration[i-1], iteration[i], iteration[i+1])
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if not TOTALISTIC:
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new.append(rules[top])
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else:
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for rule, func in RULE.items():
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if rule(sum(top)/3):
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new.append(func(sum(top)/3))
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else:
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new.append(0)
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return new
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def update(i):
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visible = iteration[(len(iteration)//2)-(WIDTH//2):(len(iteration)//2)+(WIDTH//2)]
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if PIXEL_MODE == 'bw':
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return (visible[i], visible[i], visible[i])
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elif PIXEL_MODE == 'color':
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return (visible[3*i], visible[3*i+1], visible[3*i+2])
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l = Ledbar(PIXELS)
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work = True
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t = 0
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while work:
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for i in xrange(PIXELS):
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c = update(i)
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l.set_pixel(i, c[0], c[1], c[2])
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work = l.update()
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t += 1
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if not (t % SLEEP):
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iteration = iterate(iteration)
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