Table 2: Edge and cell IDs.

(a)
Direction	Edge ID
(−1, 1, 1)	0
(1, −1, 1)	1
(1, 1, −1)	2
(1, 1, 1)	3
(0, 0, 2)	4
(0, 2, 0)	5
(2, 0, 0)	6

(b)
Cell Type	Cell ID
(0,1,2)	0
(0,2,1)	1
(1,0,2)	2
(1,2,0)	3
(2,0,1)	4
(2,1,0)	5