Feature Model Reconstruction for Freeform Surface Design

In the conceptual design phase,designers not only require an easy way to construct a freeform surface,but also need to modify it intuitively.According to taxonomy of freeform feature,this paper proposed freeform surface feature model design system to meet this need.This paper introduced a freeform feature library as the basis of the system,with basis surface and freeform features in the library,freeform design being constructed by Boolean-like operations,and designers can modify features with changing high level parameters.