网上博览会虚拟场景在线拖建技术研究  

Online Drag-and-Drop Building Technology in Virtual Scene on Virtual Exhibition

作　　者：杜宝江[1] 刘佳[1] 钱诚元[2] 吴恩启[1] 李佳蓓[1] 

机构地区：[1]上海理工大学虚拟制造技术研究院,上海200093 [2]上海世博会事务协调局,上海200125

出　　处：《系统仿真学报》2010年第9期2120-2124,共5页Journal of System Simulation

基　　金：国家科技支撑计划;世博科技专项(2009BAK43B07);上海市科委世博科技专项(08dz0580209)

摘　　要：在互联网上采用Web3D技术动态构建网页上的虚拟场景,让用户参与场景的搭建,将大大提升网上虚拟展览馆的互动性。以"2010年中国上海网上世博会"专项项目为研究背景,引入用户在互联网浏览器的页面上实现拖放场景元素动态搭建三维虚拟场景的方法,重点讨论了Web页面拖放检测技术,将包围盒射线求交法与最近平面坐标系转换法进行结合并应用于Web页面,实现三维对象的拖放和定位,阐述了分布式存储模式下的虚拟元素索引和虚拟场景动态在线构建综合应用的动态生成方法。实验证明该方法简单有效,为Web客户端的三维虚拟场景快速交互构建提供了便捷的方法。The interaction of the virtual pavilion online is enlarged by means of making Internet visitors participate in the construction of virtual scene and interact with it on web pages,which has been achieved by using the Web3D technology. Under the background of ＂Expo Shanghai Online＂,a method of dragging and dropping elements on web pages which dynamically generate 3D virtual elements online was introduced. The Drag-and-Drop Building technology which was applied on web pages through the combination of Ray-Box Intersection and Coordinates Transfer method based on the nearest plane was mainly discussed as well as the comprehensive application of virtual elements indexing under the distributed storage pattern and dynamic generation of virtual scene on Internet. Tests proof that the method is simple and effective,which provides a convenient way for Web3D clients to interact with the 3D scene rapidly.

关 键 词：网上博览会 WEB3D 拖放搭建 动态生成 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]