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barneygale/gist:3659371

Created September 6, 2012 18:45
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gistfile1.py
def steps():
a = 1
dx = 0
dy = 0
x = 0
y = 0
while True:
a += 1
dx = ((1+a) & 1) - (2 if (a % 4) == 0 else 0)
dy = (a & 1) - (2 if (a % 4) == 1 else 0)
for i in range(a >> 1):
x += dx
y += dy
yield x, y
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