4 [four vertices] 1 3 3 -0 [path through 1 face: face 3, vertex 3, fraction along edge = 0] 1 1 3 -0 [path through 1 face: face 1, vertex 3, fraction along edge = 0] 1 0 3 -0 [path through 1 face: face 0, vertex 3, fraction along edge = 0] 1 0 3 0 [path through 1 face: (source vertex) face 0, vertex 3, fraction along edge = 0]