中文摘要：

视景仿真是虚拟现实最主要的表现方式，而运动模型是视景仿真中的重要环节。首先简单介绍了Vega中提供的基本运动模型，然后介绍了应用路径和导航器定义运动的方法，阐明了如何利用LynX和路径工具创建与编辑路径和导航器，给出了利用API接口函数编程实现路径和导航器的流程，随后讨论了自定义运动模型的设计步骤及其数据结构，以鼠标控制浏览场景为例给出了自定义运动模型函数的编写方法，最后应用Vega结合MFC利用多种运动模型编写了飞行视景仿真平台，取得了理想的效果。

英文摘要：

Scene simulation is the most important form of Virtual Reality and motion model is one of the key parts of scene simulation. A brief introduction of basic motion models in Vega is given, then reali- zation of defining motion with pathing module and navigators module are presented both using LynX and API. Furthermore, the design procedure and data structure of user - defined motion model is discussed, and a mouse -controlled userdefined motion model is introduced. With the application of many motion models referred,a flight simulation platform is developed based on Vega using MFC, which shows good performance.