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Proceedings of CAD'16, 2016, 242-245
Automatic Synchronization of a Feature Model with Direct Editing
Abstract. In the last two decades, parametric and feature-based modeling  played a great role in computer-aided design and brought huge economic benefits to manufacturing industries. Rather than low-level editing, the technology enables a designer to create or edit high-level design elements, i.e. “feature”, which possesses rich engineering/manufacturing semantics. However, feature-based modeling has its own drawbacks, e.g. high complexity, order dependency and predefinition of changeable parameters, which can hamper the modeling flexibility. Recently, direct modeling technology is rapidly developing and getting used in commercial CAD systems like SpaceClaim, NX and Creo. Direct modeling is friendly to normal users, as one can easily manipulate geometric elements to edit a native model, without understanding the complex or even tricky design semantics in the feature model. Compared with feature-based modeling, direct modeling is a lightweight editing tool, being more efficient and flexible. Early/conceptual design or personal customization/fabrication can all benefit from it. While the above two technologies have their own merits, they can be complementary to each other. They are often used in different design phases or preferred by experts from different domains.
Keywords. Direct Modeling, Feature-based Modeling, Automatic Synchronization, Cellular Model, Design Semantics