真实场景的生成与实时绘制技术

真实场景的实时绘制是飞行模拟器视景系统开发的一个难点。本文介绍了采用大幅遥感卫星照片和DEM数据生成真实场景和使用IRIS Performer开发工具，实时绘制真实场景的技术，提出了采用区域分割，多精度模型等方法，将大片区域场景分成若干了子块，每块有几层模型的设计思想，提出了基于视步的场景数据动态分块调入与释放策略，应用该方法实时绘制的真实场景已投入飞行模拟训练，获得了满意效果。

Real-Time Generating and Rendering Technology of Reality Scene

Real-time rendering of reality scene is one of the difficulties for visual system of flight simulator. This paper introduces a technology that large remote sensing satellite image as texture and DEM data are used in generating reality scene and IRIS Performer develop tool is used in real-time rendering reality scene. Scene is divided into cells with the methods of partition range and multi-resolution model. The concept of many layer models in a cell is brought. The dynamic data partition and schedule strategy based on view point is presented. The reality scene of real-time rendering has been used with this method in our flight simulator .The experiment results show that the visual effect is perfect.