It is not only handy for visibility detection but also for collision detection, realtime shadows and many more things.
不仅仅对于‘可见检测’来说很方便，还有实时阴影以及其它方面。
Passive shadows resulted from roadside buildings or trees and active shadows caused by moving vehicles, are one of the factors that arise errors in video based vehicle detection.
在基于视频图像的交通监视系统中，由路边建筑、树木等物体引起的静态阴影和由运动物体如车辆引起的运动阴影，是导致车辆检测错误的一大主要因素。
Support dynamic shadows, particle systems, character animation, indoor and outdoor technology, and collision detection.
支持动态的阴影，粒子系统，角色动画，室内和室外技术以及碰撞检测等。
Support dynamic shadows, particle systems, character animation, indoor and outdoor technology, and collision detection.
支持动态的阴影，粒子系统，角色动画，室内和室外技术以及碰撞检测等。
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