特征编辑技术的研究

特征编辑已成为特征造型系统中提造型能力和造型效率的关键。为此文中提出重用ＣＳＧ和ＦＤＴ的特征线修改算法，且与模型构造的历史顺序无关。同时在特征编辑中满足面特征、体特征设计的前提假设条件下，提出特处非线性修改算法。

RESEARCH ON FEATURE EDITING TECHNOLOGY

Feature editing has become a key approach for improving ability and efficiency of modeling in feature\|based solid modeling. So, based on reusable CSG and FDT technologies, a feature linear modifying algorithm is presented, which is independent of the sequential history of modeling steps. Meanwhile, a nonlinear modifying algorithm that satisfies the assumptions of face\|based and volume\|based feature design is proposed in feature editing, which can re\|evaluate a modified part with minimum Boolean operations, thus solving the problem that a part modification's time will cost more with a more complicated structure. An algorithm of combining features linear modifying with nonlinear modifying is given to improve the stability and efficiency of feature editing.