In computer graphics and CAD, the clipping Windows researched up to now are all rectangular or polygonal. But in practice circular or elliptic clipping Windows are often used.

在计算机图形学及CAD中，到目前为止所研究的裁剪窗口都是矩形或多边形的，而在实际应用中经常要用到圆形或椭圆形裁剪窗口。

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Graphics clipping and covering is one of the key points in computer graphics field. After more study and practice, a new algorithm is give, which is for clipping and covering in circular window.

图形的裁剪与覆盖是计算机图形学中较为热点研究的问题，作者对此进行了深入的研究与实践，提出了较为理想的圆形窗口“裁剪与覆盖”的计算机辅助设计新算法。

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Graphics clipping and covering is one of the key points in computer graphics field. Alter more study and practice. a new algorithm is give. which is for clipping and covering in circular window.

图形的裁剪与覆盖是计算机图形学中较为热点研究的问题，作者对此进行了深入的研究与实践，提出了较为理想的圆形窗口“裁剪与覆盖”的计算机辅助设计新算法。

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