1. A vertex tree is built to represent the data structure of the models by octonary subdivision.
以八叉剖分来建立一棵顶点树，用以表示整个网格模型的数据结构。
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2. In the algorithm of mesh simplification based on vertex clustering, a vertex tree is built to represent the data structure of the models by octonary subdivision.
3. In the algorithm of mesh simplification based on vertex clustering, a vertex tree is built to represent the data structure of the models by octonary subdivision.
