Meanwhile, it is required that the free-form surface modeling must be able to change the freedom of local and meet all kinds of design requirements.

同时，要求自由曲面的造型必需能够局部地自由加以变更，使其符合各式设计需求。

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Physics based modeling is one of the keen free form surface modeling method at present, and it should be a practical surface modeling method in the future.

基于物理的造型方法是当今曲面造型研究的热点之一，并可望成为今后曲面造型的实用工具。

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The aim of this dissertation is to perform complex free form surface modeling by choosing appropriate methods, then it can satisfy the requirements of numerical control machining.

本文的出发点是通过选用适合方法对复杂自由曲面进行造型，满足曲面数控加工的需要。

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