【作者】 侯文君； 段文嘉； 祖明； 杨冬；

【Author】 Houwenjun Duanwenjia Zuming Yangdong Yaofusheng (Automation school, Beijing University of Posts & Telecommunications, Beijing, 100876

【机构】 北京邮电大学自动化学院；

【摘要】 本文分析了交互式虚拟产品展示设计平台的功能、结构及关键技术,并基于VRML/X3D、Java、XML构建了虚拟产品展示平台,探讨了统一信息表示理论和算法;提出了采用集成应用现有有效三维模型压缩算法的方法,对模型进行多目标简化,并采用三维轻量化文件的数据组织方式来表示X3D模型文件,从而实现虚拟产品的数据压缩技术;给出了基于兴趣度的系统优化设计解决方案与算法;实现了行为交互处理、组件层次树生成和场景交互处理等主要模块。更多还原

【Abstract】 the exhibition of virtual product based on three-dimensional model can roundly provides a bran-new experience of understanding the actual product. It also offers a particular exhibiting mode for enterprises to show their products. The exhibition of virtual product has become the latest trend of E-business and advertisement, which has fetched remarkable economy benefit for the industry. This paper explored the basic function, framework and essential technology of the interactive virtual product exhibition platform, which was founded on VRML/X3D, Java and XML for Multi-Users. Then the framework for Multi-Users distributed three-dimensional graphics engine and the configuration of the whole platform were presented in this paper. After analyzing the characters of most CAD and CAID model format, the author proposed the theory of unified information expression, presented the reconstruction arithmetic for the geometry information of the product model based on X3D, for the sake of figuring out the problem about graphics data exchange in the procession of model data transmission. As for the bottleneck in the three-dimensional model data transmission by network, the author put forward a way for Multi-goals simplification, which integrated the existing effective three-dimensional model compression arithmetic, then described the data compression arithmetic of virtual product, whose data was organized in the way of three-dimensional lightweight file. Because of the large amount of model and scene data, the train of thought to solve this problem was to dynamically spread and compress the virtual scene, besides compressing the data itself. Namely that the platform system can set up idiographic interest model agent for every user by analyzing and summarizing the user’s behaviors after logging in the system, then automatically control and optimize the agent and even recommend it to the user. Some main modules, such as the process of behavior interaction, the building of subassembly level trees and the management of scene interaction were carried out in this paper. A virtual exhibition platform antetype of mobile phone was realized and presented at the end of the paper.更多还原