当眼睛停留集中在某点是我们称它为固视，当在若干固视点间移动时我们把它称做扫视。

When the eyes stop to focus it is called a fixation and the movements between these fixations are called saccades . See image below

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此文给出了在任意坐标系下视点移动后生成新视图的公式，以及具体推导过程。

In this thesis, the authors have given the process that the view is synthesized after the motion of viewpoint in the arbitrary coordinate system and the process of specific speculation.

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当照相机显著地移动时，引擎也只不过重新渲染下视点替用特效，并且，你可以很好的去获得其它的帧。

When the camera does move significantly, the engine simply re-renders the impostor, and you're good to go for another couple of frames.

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