Models at multiple level of detail are widely used in real time rendering of complex 3d scene, flight simulator, 3d animation, interactive visualization, and virtual reality.
它可用在复杂3d场景快速绘制、飞行模拟器、3d动画、交互式可视化和虚拟现实等应用系统中。
In distributed simulation system, one node connects with the others through message. In many simulation systems, 3d terrain virtual scene takes part in the whole process as a very important part.
分布式仿真系统中，各节点之间通过消息互相交流信息，3维地形虚拟场景通常在大量的仿真系统中作为重要的对象参与仿真。
It utilizes 3d virtual scene made by computers as background and combines it with the foreground images of actors in studio in real time.
这项技术把计算机制作的虚拟三维场景作为背景，并与电视摄像机拍摄的演员图象复合起来作图象输出。
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