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Table 1 Sequences associated to the seven orientations emanating from the root facet in the ideal mesh of Figure 4

From: An ordered topological representation of 3D triangular mesh facial surface: concept and applications

Orientation Sequence
12 an + 1=a n + 3, a1=3
1 an + 1 = a n + 4, a1 = 5 (dark facets), a1 = 4 (white facets)
3 an + 1=a n + 6, a1=5,a1=6 (white facets)
5 an + 1=a n + 8, a1=9,a1=8 (white facets)
6 an + 1=a n + 9, a1=9
7 an + 1=a n + 10, a1=9,a1=10 (white facets)
9 a n = 1 (dark facet), an + 1 = a n + 12, a1 = 12 (white facets)