v 1 2 3
v 4 5 6
v 7 8 9
v 10 11 12
v 1 2 3 1 0 0
v 4 5 6 0 1 0
v 7 8 9 0 0 1
v 10 11 12 1 1 1
vt 0 0
vt 1 0
vt 0 1
vt 1 1
vt 0 2
vt 2 0
vn 1 0 0
vn 0 1 0
vn 0 0 1
vn -1 0 0
vn 0 -1 0
vn 0 0 -1

g Mesh
f              \
	1          \
	2/1        \
	3//1       \
	4/2/2      \
	5          \
	6/3        \
	7//3       \
	8/4/4      \
	0          \
	/5         \
	//5        \
	/6/6       \