4 -5 2  0 0 0  0
2.5 .5 2  1
triangle 0 0 0  1 0 0  1 0 1
triangle 0 0 0  1 0 1  0 0 1

triangle 0 0 1  1 0 1  1 1 1
triangle 0 0 1  1 1 1  0 1 1

triangle 1 0 0  1 1 0  1 1 1
triangle 1 0 0  1 1 1  1 0 1

triangle 0 1 0  1 1 0  1 1 1
triangle 0 1 0  1 1 1  0 1 1

triangle 0 0 0  1 0 0  1 1 0
triangle 0 0 0  1 1 0  0 1 0

triangle 0 0 0  0 1 0  0 1 1
triangle 0 0 0  0 1 1  0 0 1

plane 0 0 -1  0 0 1