基于Vega的虚拟城市仿真系统设计研究

虚拟城市仿真系统是当今虚拟现实技术研究的一个重要热点，它既具备场景表达的直观友好，也具备空间分析的抽象特征．即综合三维场景漫游与二维抽象分析的优势。该文阐述了在VC环境，对Vega所提供的API进行二次开发．实现虚拟城市三维场景的漫游，多种场景的渲染，并提供GIS基本查询的系统设计方案。设计思路包括三个过程：三维场景部分、二维分析部分、数据库管理部分，文章分别对它们的关键技术加以论述。

The Design for the Simulation System of Virtual City Scene Based on Vega

The virtual city is an important hot spot of research in virtual reality technology. It both has a intuitionistic and friendly expression of city scene, and has abstract character for space analysis, which means that it combines the advantages of 3D scene＇s cruise and 2D abstract analysis. Then, we will explain the course of the design for the Simulation System of Virtual City Scene Based on Vega in details with pro- totype of developing-method, which is composed with three parts-part of 3D scene, of 2D analyze, and of the database management. And then we will dissertate them one by one. At last, we take an example to discuss the problem about the development of this system.