The X in these function refers to the screen coordinate system.

函数中的x代表屏幕坐标系统。

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The coordinate system must therefore be mapped from logical Cartesian coordinates to physical screen coordinates.

因此，坐标系统需要从逻辑坐标系转换到物理坐标系上去。

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This paper puts forward the method of locating the 3D model in the screen coordinate in the design of the visual system of a submarine voyage training simulator.

该文主要论述了在潜艇航行训练模拟器三维视景仿真中，把三维模型投影到屏幕坐标系当中的方法。

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