中文摘要：

本文针对网络环境下海量三维模型数据的传输与可视化要求，探讨了三维模型数据多尺度组织方法。设计了基于点索引的三维模型几何数据结构，结合多尺度纹理表达，构建三维模型多尺度数据结构。在此基础上，基于四叉树结构构建分层分块的三维模型数据多尺度存储结构，从而适应三维模型数据的多尺度分块调度与传输，并通过实验验证该方法能根据三维场景中视点的变化，动态、分块地传输多尺度三维模型数据，快速响应传输请求，保证三维场景绘制效率。

英文摘要：

For the requirements of the transmission and visualization of massive 3D model data in network environment, the organization method for network transmission of 3D model multi-scales data was presented in this paper. Firstly, the geometric data structure of 3D models based on point index was designed. Secondly, combined with multi-scale texture, the multi-scale data structure of 3D models was constructed. Then, the storage structure of muki-scale 3D models data in hierarchical was designed, in order to accommodate multi-scales 3D model data block scheduling and transmission. Finally, according to the experiments, it was proved that this method could transport the multi-scale data dynamically and by blocks with the changes of viewpoint in the scene, response transfer requests fast, to ensure the efficiency of 3D scene rendering.