1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
# top v 0.0 1.0 0.0 # base v 0.0 0.0 -1.0 v -1.0 0.0 1.0 v 1.0 0.0 1.0 # base f 2 3 4 # front f 1 3 4 f 1 2 3 f 1 3 4