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V0
face-vertex : V4
V1
V3
V2
V4
V5
V6
V7
V8
V9
V10
V11
V12
edge-vertices : V5, V6, V7, V8
vertex-vertices : V9, V10, V11, V12
Level 1
OrderVerticesFromFaceFirst = true
Level 2
Level 1
OrderVerticesFromFaceFirst = false
Level 2
...
...
...
...
Face verts
Edge verts
Vertex verts
Face verts
Edge verts
Vertex verts
Vertex verts
Edge verts
Face verts
Vertex verts
Edge verts
Face verts