It's basically the idea of, you wear a leotard, and they put some reflective markers on your body, and instead of using cameras, there're infrared sensors around a volume, and those infrared sensors track the three-dimensional position of those markers in real time.
想法基本上就是，你穿一个连衣裤， 然后安放一些反光标志 用来替换摄像机的， 是围绕在一个空间内的红外感应传感器 那些红外传感器实时地跟踪 那些标记的空间位置