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from itertools import product, combinations
from operator import eq
from pyx import *
projector = graph.graphxyz.central(10, 20, -30).point
a = 2
cube = list(product([-a, a], repeat=3))
edges = list(filter(lambda edge: sum(map(eq, edge[0], edge[1])) == 2,
combinations(cube, 2)))
c = canvas.canvas()
for begin, end in edges:
x1, y1 = projector(*begin)
x2, y2 = projector(*end)
if begin[0] != end[0]:
col = color.rgb.blue
elif begin[0] == a:
col = color.rgb.red
else:
col = color.rgb.green
c.stroke(path.line(x1, y1, x2, y2), [style.linewidth.Thick, col])
for vertex in cube:
x, y = projector(*vertex)
c.fill(path.circle(x, y, 0.2))
c.writeEPSfile()
c.writePDFfile()
c.writeSVGfile()
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