面向大型产品虚拟展示的数据管理方法研究  

Research on Data Management for the Large-scale Virtual Products Exhibition

作　　者：肖元秀 刘景[1] 黄淑荣[1] 

机构地区：[1]河海大学物联网工程学院,常州213022

出　　处：《微处理机》2013年第6期53-57,共5页Microprocessors

摘　　要：合理有效的模型数据管理是在桌面虚拟环境中实现大型产品虚拟展示的关键问题。针对大型产品模型数据量大、结构复杂的特点,采用关系型数据库管理模型数据。设计了场景图管理方法,并基于NUR算法实现内存动态调度,充分利用系统内存空间。综合利用视锥体裁减、隐藏面删除和几何体数据合并等模型简化与显示优化技术,提高场景渲染效率。基于以上方案设计实现了机车虚拟装配与展示系统,验证了所采用方法的有效性。Reasonable and effective model data management is the key point for the large -scale virtual products exhibition in the desktop virtual environment. Because of the complex structure and a large amount of data, the database, designed by the Relational Database Management System, is used to manage the data of large - scale product model. A data structure, Scene Graph, is used to organize the whole scene, and the NUR algorithm is implemented for memory dynamic scheduling and to make full use of memory space. Some techniques, such as visual cone reduction, the hidden surface removal and geometry data merge, are used to optimize the efficiency of scene rendering. The above methods are implemented and validated in the locomotive virtual assembly and display system.

关 键 词：虚拟展示 模型数据管理 NUR算法 显示优化 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]