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jkseppan/cube24.py

Created December 19, 2021 06:40
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cube24.py
import itertools as it
import numpy as np
def cube24(points):
points = np.asarray(points)
pp = [(0, 1, 2), (1, 2, 0), (2, 0, 1)]
sp = [(1, 1, 1), (-1, -1, 1), (-1, 1, -1), (1, -1, -1)]
pn = [(0, 2, 1), (1, 0, 2), (2, 1, 0)]
sn = [(-1, 1, 1), (1, -1, 1), (1, 1, -1), (-1, -1, -1)]
for perm, sign in it.chain(it.product(pp, sp), it.product(pn,sn)):
yield points[:,perm] * sign
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