用四个数值来表示这个相机的视图将绘制在屏幕的什么地方，使用屏幕坐标系(值0 - 1)。

Four values that indicate where on the screen this camera view will be drawn, in screen Coordinates (values 0-1).

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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。

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.

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现在我们已经有了照相机，但是还要将3D空间影射到把三维空间坐标系转换到二维屏幕坐标系的“视口”上。

Now that we have the camera, we must map 3D space to a 'viewport' which handles the translation of coordinates from 3D space to the 2D screen.

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