Data commit

Task/Elementary-cellular-automaton/Python/elementary-cellular-automaton-1.py

@@ -0,0 +1,21 @@
+def eca(cells, rule):
+    lencells = len(cells)
+    c = "0" + cells + "0"    # Zero pad the ends
+    rulebits = '{0:08b}'.format(rule)
+    neighbours2next = {'{0:03b}'.format(n):rulebits[::-1][n] for n in range(8)}
+    yield c[1:-1]
+    while True:
+        c = ''.join(['0',
+                     ''.join(neighbours2next[c[i-1:i+2]]
+                             for i in range(1,lencells+1)),
+                     '0'])
+        yield c[1:-1]
+
+if __name__ == '__main__':
+    lines, start, rules = 50, '0000000001000000000', (90, 30, 122)
+    zipped = [range(lines)] + [eca(start, rule) for rule in rules]
+    print('\n   Rules: %r' % (rules,))
+    for data in zip(*zipped):
+        i = data[0]
+        cells = data[1:]
+        print('%2i: %s' % (i, '    '.join(cells).replace('0', '.').replace('1', '#')))

Task/Elementary-cellular-automaton/Python/elementary-cellular-automaton-2.py

@@ -0,0 +1,17 @@
+def eca_wrap(cells, rule):
+    lencells = len(cells)
+    rulebits = '{0:08b}'.format(rule)
+    neighbours2next = {tuple('{0:03b}'.format(n)):rulebits[::-1][n] for n in range(8)}
+    c = cells
+    while True:
+        yield c
+        c = ''.join(neighbours2next[(c[i-1], c[i], c[(i+1) % lencells])] for i in range(lencells))
+
+if __name__ == '__main__':
+    lines, start, rules = 50, '0000000001000000000', (90, 30, 122)
+    zipped = [range(lines)] + [eca_wrap(start, rule) for rule in rules]
+    print('\n   Rules: %r' % (rules,))
+    for data in zip(*zipped):
+        i = data[0]
+        cells = data[1:]
+        print('%2i: %s' % (i, '    '.join(cells).replace('0', '.').replace('1', '#')))

Task/Elementary-cellular-automaton/Python/elementary-cellular-automaton-3.py

@@ -0,0 +1,23 @@
+def _notcell(c):
+    return '0' if c == '1' else '1'
+
+def eca_infinite(cells, rule):
+    lencells = len(cells)
+    rulebits = '{0:08b}'.format(rule)
+    neighbours2next = {'{0:03b}'.format(n):rulebits[::-1][n] for n in range(8)}
+    c = cells
+    while True:
+        yield c
+        c = _notcell(c[0])*2 + c + _notcell(c[-1])*2    # Extend and pad the ends
+
+        c = ''.join(neighbours2next[c[i-1:i+2]] for i in range(1,len(c) - 1))
+        #yield c[1:-1]
+
+if __name__ == '__main__':
+    lines, start, rules = 20, '1', (90, 30, 122)
+    zipped = [range(lines)] + [eca_infinite(start, rule) for rule in rules]
+    print('\n   Rules: %r' % (rules,))
+    for data in zip(*zipped):
+        i = data[0]
+        cells = ['%s%s%s' % (' '*(lines - i), c, ' '*(lines - i)) for c in data[1:]]
+        print('%2i: %s' % (i, '    '.join(cells).replace('0', '.').replace('1', '#')))