box.t3d

# This is a comment
vertex 1 xyz 0.0 0.0 0.0
vertex 2 xyz 1.0 0.0 0.0
vertex 3 xyz 1.0 1.0 0.0
vertex 4 xyz 0.0 1.0 0.0

vertex 5 xyz 0.0 0.0 1.0
vertex 6 xyz 1.0 0.0 1.0
vertex 7 xyz 1.0 1.0 1.0
vertex 8 xyz 0.0 1.0 1.0

# curves
curve 1 vertex 1 2
curve 2 vertex 2 3
curve 3 vertex 3 4
curve 4 vertex 4 1

curve 5 vertex 5 6
curve 6 vertex 6 7
curve 7 vertex 7 8
curve 8 vertex 8 5

curve 9 vertex 1 5
curve 10 vertex 2 6
curve 11 vertex 3 7
curve 12 vertex 4 8

patch 1 normal 0 0 1 boundary curve 1 2 3 4
patch 2 normal 0 0 1 boundary curve 5 6 7 8
patch 3 normal 1 0 0 boundary curve 12 8 -9 -4
patch 4 normal 1 0 0 boundary curve 11 -6 -10 2
patch 5 normal 0 1 0 boundary curve 9 5 -10 -1
patch 6 normal 0 1 0 boundary curve 12 -7 -11 3

region 1 boundary patch -1 2 -3 4 -5 6 size def