According to mechanism of orthographic projection, this paper has set up the converted relation between screen coordinate and space coordinate.

根据正投影的机理，建立了点线面屏幕坐标与空间关系的转换关系。

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This small space can accommodate a few people to sit and view the screen, thus functioning much like a small family projection room.

这小小的空间可以供几个人坐下观看，因此它实际上有点像一个家庭放映厅。

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