虚拟现实技术在露天矿生态重建仿真中的应用

介绍了用虚拟现实技术开发露开矿生态重建视景仿真系统的几项关键技术。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5重建仿真模型；采用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，对三维地质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；分析了在实时仿真系统中显示露天矿三维动态全景图、根据视点需求实时驱动虚拟场景动态变化及漫游的几种方法，用Vega软件实现了露天矿三维动态全景图的显示与实时驱动；采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；提出一种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。

Application of Virtual Reality in Ecological Reconstruction Scenery Simulation System of Open-Pit Mines

Several key techniques of using virtual reality to develop open pit mine ecological reconstruction simulation system were introduced. It was modelled by adopting hierarchical model combined with object oriented data structure. In order to construct a multilevel and multiresolution model for the terrain and architecture in the virtual environment, the LOD technique was adopted. Two methods of using Vega to realize open pit mine 3D dynamic panoramic displaying and the real time driving were especially discussed. Ecological reconstruction planning alternatives can be designed using the entity mark technique. A new algorithm to use mouse to acquire entity model information in a 3D virtual scene was proposed in order to realise 3D dynamic query and connection to external databases.