优化WebVR模型数据下载的VSPLA算法  

VSPLA algorithm for optimizing WebVR model data downloading

作　　者：赵强[1] 周圣川[1,2] 马纯永[1,2] 陈戈[1] 

机构地区：[1]中国海洋大学信息科学与工程学院,山东青岛266100 [2]化学品安全控制国家重点实验室,山东青岛266071

出　　处：《计算机工程与设计》2012年第11期4288-4293,共6页Computer Engineering and Design

基　　金：煤炭资源与安全开采国家重点实验室开放课题基金项目(SKLCRSM09KFB02);国家重点实验室开放研究基金项目(SKL-014)

摘　　要：针对用户在网络虚拟现实大场景漫游过程中整个场景的模型数据不能及时下载到本地的问题,提出了基于当前视点空间位置的VSPLA(viewpoint spatial position level of detail and area of interest)模型数据筛选算法。该算法对模型数据按其精度进行分级,根据视点空间位置对不同区域不同精度的模型数据进行索引传输,通过降低需要下载的模型数据量,减少用户在漫游网络虚拟现实场景过程中等待场景加载的时间。实验结果表明,该算法可有效提高用户漫游过程中模型加载效率。Aiming at the problem that the whole scene＇s model data can＇t be downloaded to local storage when users roaming in the large-scale virtual scene on the network, the VSPLA （Viewpoint Spatial Position Level of detail and Area of interest） model data selection algorithm based on the current spatial viewpoint is demonstrated. This algorithm levels model data due to the precision, then index and transmit model data of different regions and different precisions, according to spatial viewpoint. By usage of reducing the volume of model data need to be downloaded, it could cut down the waiting time for loading when user roaming web virtual scene. Experiments illustrate that, the algorithm can effectively improve the model loading efficiency of the user during the roaming process.

关 键 词：网络虚拟现实 模型数据 细节分级 兴趣域 网格索引 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]