关键词: Loop细分曲面, 自适细分应曲面, 模型切片, 快速成型制造

Abstract: In order to improve the smoothness of slice contours of a STL model in Rapid Prototyping Manufacturing (RPM), an algorithm of selfadaptive surface subdivision was proposed based on the Loop mode. Firstly, a mesh model was segmented into planar part and surface part, and new subdivision schemes were designed for the facets on the surface part connecting to the sharp edges. During this procedure, the flatness and tolerance flatness of a vertex were employed to determine whether this facet should be further subdivided to achieve selfadaptive subdivision. Finally, smoothness of the surface part was enhanced, while the sharp features were maintained. Thus, the smooth slice contours could be obtained from global information.

Key words: Loop subdivision surface, selfadaptive subdivision surface, model slice, rapid prototyping manufacturing