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Update half-edge.md
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lmj01 committed Nov 4, 2023
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Expand Up @@ -8,7 +8,16 @@ geometric interpretations,称为embeddings,与半边结构的关系是

半边结构的重点在于它能够有效地回应邻接查询

-
- 那些edges与vertex相连
- 那些polygons与vertex相连
- 那些vertices与polygon相连

半边结构达到这些目的仅仅使用常量数据对每个要求。它能描述polygon meshes和所有graphs(包含带循环的多图),它能描述mixes of a polygon mesh and a wireframe mesh.

但也存在两个很重要的限制于关系的描述
- no non-orientalbe sureface(Moebius strip)莫比乌斯带




## 参考
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