虚拟现实场景生成仿真，用于仿真建模，根据目标和背景亮度计算公式和3维图形开发包,建立了仿真3维场景。基于仿真场景,对激光动态光束定向系统的跟踪识别过程进行了仿真研究。(This sample illustrates the use of IR Scene Generator (vpIRSceneGen).　It defines the class myApp, which is derived from vpApp, and overrides the　The town.acf loads town.flt and allows the user to fly around the database using a UFO motion model.　The tank.acf loads m1_tank.flt and allows the user to fly around the model using the spin motion model.　Both simulate a basic 3-5 micron FLIR setup.)