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7- Directional self-similar array 3D Model
Another polar zonohedron space-filling array showing a pair of 42 faced
7-directional co-ordinate cells, connected at polar vertices like beads strung
together. The original pair is partially surrounded by subcells in the
co-ordinate system that are building out to a double length 42-faced cell.
This is a self-similarity which means it becomes a space-filling pattern.