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edge type
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parent tree id
e1
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raw
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v5
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raw
0
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v1
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v1
v2
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(x,y,z)
(x,y)
v3
F0
(x,y,z)
(x,y)
F0
(x,y,z)
(x,y)
F2
(x,y,z)
(x,y)
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(x,y,z)
(x,y)
v5
v5
F1
(x,y,z)
(x,y)
F2 F1
(x,y,z)
(x,y)
F1 F2
(x,y,z)
(x,y)
F2
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(x,y)
v2
v5
v1
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v4
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v4
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v6
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face list
3d position
2d position
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