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。
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.
出处
《测绘科学》
CSCD
北大核心
2011年第6期182-183,154,共3页
Science of Surveying and Mapping
基金
国家自然科学基金青年基金资助计划(40801163)
国家863计划资助项目(2009AA12Z229)
关键词
三维模型
点索引数据结构
多尺度
网络传输
3D model
point index structure
muhi-scales
network transportation
作者简介
作者简介：陈静（1975-），男，江西樟树人，博士，副教授，主要从事基于网络环境下的地球空间信息服务研究。E—mail：jchen@whu．edu．cn
