Different methods for freedeformation have been developed in the recent years to overcome difficulties in direct manipulation of surfaces.
近年来为了克服直接操作自由曲面的困难，提出了几种自由变形方法。
2
Different methods for freedeformation have been developed in the recent years to overcome difficulties in direct manipulation of surfaces.
提出了一种新的通过控制参数曲面来实现物体的自由变形的方法。
3
It provides an effective approach to further and systematical study of freedeformation mechanism and law in tube axial compressive precision forming process.