按点-线-面的层次数据结构，选取几种有代表性的曲线曲面，实现了三维复杂外形的表面描述。
Based on a point line patch hierarchical data structure, three dimensional complex geometries are described by several typical kinds of surface patches.
文中最后选取了一个比较有代表性的模型，通过对其进行建模和编程，验证本文的复杂曲面仿真算法和误差分析方法。
At last, a representative model is selected in this paper, using the program of this model, validated the simulating method of complex surface and the error analysis method.
首先将加工曲面分片，选取合适的初始点。
The machining surface is divided into some chip and a right initial point is selected at first.
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