摘要
介绍了用虚拟现实技术开发露天矿生态重建视景仿真系统的几项关键技术。针对露天矿生态重建应用特点,采用层次型与面向对象相结合的三维数据结构,构造露天矿生态重建视景仿真模型;用LOD技术为露天矿虚拟环境中的地形和建筑物构造多层次、多分辨率的细节模型,提出了基于视点的连续LOD算法,对三维地形模型按数据块进行简化,以适应不同硬件平台和视觉特性的分辨率需求;采用Vega软件实现露天矿三维动态全景图显示与实时驱动的基本方法;用实物标图技术在虚拟场景中进行生态重建规划方案的设计方法;提出一种新的用鼠标获取三维虚拟场景中实体模型信息的算法,实现三维动态查询和与外部数据库的链接。
Several Key techniques using Virtual Reality to develop open-pit mine ecological reconstruction scenery sim-ulation system are introduced in this paper.According to the character of open-pit mine ecological reconstruction,open-pit mine ecological reconstruction scenery simulation system is modelled by adopting hierarchical combined with object-oriented data structure.In order to construct the multilevel and multiresolution model for the terrain and architecture in the virtual environment ,the LOD technique is adopted.Basic methods,using vega to realise open-pit mine3D dynamic panoramic displaying and the real-time driving,are especially discussed.Ecological reconstruction planning alternatives can be designed by use of the entity mark technique.A new algorithm,which uses mouse to acquire entity model infor-mation in3D virtual scene,is proposed in order to realise3D dynamic query and connection to external database.
出处
《计算机工程与应用》
CSCD
北大核心
2001年第22期41-44,共4页
Computer Engineering and Applications
基金
211工程项目(编号:B91010)资助
