样条方法是当前自由曲线曲面造型最为常用的方法，动态规划为解决离散最优化问题的有效手段。
B-spline is the most popular method to present free-form curve and surface, and DP algorithm is the effective approach for solving discrete optimization problems.
本文具体讨论了基于特征造型的自由曲面特征设计与约束求解问题。
This paper mainly discusses the freeform feature design based on the feature modeling and its constraint solving.
并以轮胎模具的花纹造型为例，阐述了平面曲线向自由曲面映射在工程中的实际应用。
The method of the least distortion mapping of planar curve to free surface is also discussed.
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