形状模型在混合建模环境中的映射研究

A DETAIL ON FORM MODELS MAPPING IN HYBRID MODELING ENVIRONMENT LIU De Zhi DONG Jin Xiang

混合建模技术是ＣＡＤ研究继参数化特征建模技术之后的又一研究热点．线框、曲面和实体模型３种模型间的转换是混合建模技术的核心．本文介绍了：１）实体模型到线框和曲面模型的映射；２）线框模型到实体模型的映射；３）曲面模型到实体模型的映射，为混合建模技术做了一些有益的探讨，并将模型映射算法成功地应用于ＩＧＥＳ和ＳＴＥＰ的前后置处理器的设计中，取得了满意的结果．

Hybrid modeling is another research direction after parametric feature modeling in CAD systems. The conversion among wireframe model, surface model and solid model is the key technique of hybrid modeling. This paper introduces 1) Mapping from solid model to wireframe model and surface model respectively, 2) Mapping from wireframe model to solid model and 3) Mapping from surface model to solid model. We also adopt the mapping algorithm into the design of IGES and STEP data interface.