在将元数据看成多维签名这种思路中，签名的每位消费者只使用与其关注点相关的投射。

In the concept of metadata as a multidimensional signature, each consumer of the signature USES only the projection that is relevant to its concern.

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一个关注点的实现只要考虑投射到相关维中的接口。

The implementation of a concern then considers only the interface projected into the relevant dimension.

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通过投射在房间中的网格状红外光点，追踪光点如何反弹并与两个摄像头获得的信息相关联来计算物体移动轨迹。

The movements are calculated by projecting a grid of infrared light spots into a room, tracking how light bounces back, and correlating this with information from the stereo cameras.

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