Visibility culling is a fundamental problem in computer graphics as well as a key technique in virtual reality engine.
可见性裁减是计算机图形学的基本问题，也是虚拟现实引擎中的一个关键技术。
Path planning is also one key aspect in virtual reality engine. One of its application automatic navigation of virtual camera is a useful technique, and worth studying.
路径规划也是虚拟现实引擎里一个重点，其中虚拟场景中的摄像机自动导航是一个具有实用价值的研究方向。
The 3d engine plays an important role in many areas, such as virtual reality, digital city, film advantage, CAD and visual computer science.
三维图形引擎在虚拟现实、数字城市、影视广告、计算机辅助设计和科学计算可视化等各个方面起着十分重要的作用。
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