从多边形窗口线裁剪的本质特征出发，首次提出窗口顶点编码的新概念。

A new concept of the window's vertex encoding is proposed for the first time based on the essential characteristic of the line clipping against polygonal window.

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本文首先研究了以窗口变换为基础的编码技术以及球面窗口线裁剪的快速求交技术。

First, encoding technology based on window transformation and a new quick calculating of the intersections between the lines and the spherical surface are discussed.

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