中文摘要：

以分布式虚拟森林灭火环境为例，基于HLA／RTI协议，设计和初步实现了地形、树木、林火、灭火工具联邦成员组成的分布式森林灭火仿真系统虚拟场景的三维动态生成与显示。系统将仿真的底层通讯和上层的模型控制框架、三维图形绘制分离开来，形成各个独立的模块，具有扩展性和重用性。

英文摘要：

Constructing virtual natural environment is a key technology to virtual geographic envi- ronment. We analyze forest environment components, and discuss the methods of modeling and vi- sualization of forest environment element. We assure that the virtual forest fire fighting environment is made of terrain, tree, forest fire and fight tools. Based on HLA/RTI protocol, a distributed vir- tual forest fire fighting environment prototype is designed and implemented. The 3D virtual forest fire fighting environment is generated by the prototype system. The bottom communication layer, the framework of model control layer and 3D graphics rendering are separated to form an independ- ent module in the system, which made the system scalable and reusable.