你可以测试，制作一个精确地通过中心线的圆，然后用测试结果在右视图混合曲面。

You can test this by making the circle go exactly through the centerline and then examine the resulting blend surface in the right view.

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提出了用矩阵变换和混合的方法，构造多种由相关曲线依据不同的扫掠规则生成的扫掠曲面。

According to different sweeping rules, a method for constructing a sweep type surface by means of coordinate transformation and blending is described.

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本文主要研究基于三角形和四边形的混合细分曲面的尖锐、半尖锐特征的生成方法。

Generation of sharp and semi-sharp features such as crease, cone and corner over the quad and triangle hybrid mesh is investigated.

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