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| #!/usr/bin/python | |
| __author__ = "Nicolas Seriot" | |
| __date__ = "2017-05-24" | |
| # http://mathworld.wolfram.com/ElementaryCellularAutomaton.html | |
| # https://en.wikipedia.org/wiki/Rule_110 | |
| import png | |
| def next_row(row, rule_bits): | |
| r = row[-1:] + row + row[:1] | |
| return [rule_bits[r[i]*4 + b*2 + r[i+2]] for (i, b) in enumerate(row)] | |
| def save_png_data(rows, filename): | |
| ll = [[255 - b * 255 for b in row] for row in rows] | |
| png.from_array(ll, 'L').save(filename) | |
| print filename | |
| def run(): | |
| rule = 110 # or 0b01101110 | |
| rule_bits = [int(x) for x in '{0:08b}'.format(rule)[::-1]] | |
| (WIDTH, HEIGHT) = (1000, 1000) | |
| row = [0] * WIDTH | |
| row[500] = 1 | |
| png_data = [row] | |
| for i in range(HEIGHT-1): | |
| row = next_row(row, rule_bits) | |
| png_data.append(row) | |
| save_png_data(png_data, "rule_%d_%d_%s.png" % (rule, WIDTH, HEIGHT)) | |
| if __name__ == "__main__": | |
| run() |
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