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。
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.
在基于顶点聚类的网格简化算法中，通常对网格模型进行八叉剖分来建立一棵顶点树以表示整个网格模型的数据结构；