point A -1.0 -1.0 -1.0
point B -1.0 1.0 1.0
point C 1.0 1.0 -1.0
point D 1.0 -1.0 1.0
face ABC A
face ABC B
face ABC C
normal ABC -0.5773502691896257 0.5773502691896257 -0.5773502691896257
face DCB D
face DCB C
face DCB B
normal DCB 0.5773502691896257 0.5773502691896257 0.5773502691896257
face CDA C
face CDA D
face CDA A
normal CDA 0.5773502691896257 -0.5773502691896257 -0.5773502691896257
face BAD B
face BAD A
face BAD D
normal BAD -0.5773502691896257 -0.5773502691896257 0.5773502691896257
