针对这一难点，提出了一种卫星轨道快速计算的方法-提取轨道的控制点，结合透视裁剪体来判断轨道的可见性。

According to this difficulty, a kind of fast calculation method of satellite orbit-extract the orbits control points is put forward, and perspective frustum is combined to judge the orbits visibility.

youdao

提出一种高效的对凸多边形组成的多面体进行圆柱面裁剪的算法，并实现了多面体的快速钻孔。

An efficient cylindrical clipping algorithm is presented to rapidly drill holes in polyhedrons, which are made up of convex polygons.

youdao

本发明垫体结实、易于清洗，还可根据需要进行任意切割、裁剪，适应不同的安置条件。

The invention also has well-knit cushion and is prone to cleaning out. Moreover it can be cut into whatever you need, so it can adapt to different embed conditions.

youdao