Simplest Canonical Polyhedron with D2v Symmetry (1 of 2)

V0 = ( 1.0,  0.0,  1.0)
V1 = (-1.0,  0.0,  1.0)
V2 = ( 0.0,  1.0, -1.0)
V3 = ( 0.0, -1.0, -1.0)
V4 = ( 1.0,  0.0, -0.5)
V5 = (-1.0,  0.0, -0.5)
V6 = ( 0.0,  1.0,  0.5)
V7 = ( 0.0, -1.0,  0.5)

Faces:
{ 0, 4, 2, 6 }
{ 6, 2, 5, 1 }
{ 1, 5, 3, 7 }
{ 7, 3, 4, 0 }
{ 0, 6, 1 }
{ 0, 1, 7 }
{ 2, 4, 3 }
{ 2, 3, 5 }
