2019/06/20 by Qiang Zou, Zou, Qiang, Hsi-Yung Feng +1 · 1 citation
Computer Science · Engineering · #Advanced Numerical Analysis Techniques #Computational Geometry (cs.CG) #FOS: Computer and information sciences #I.3.5 #Manufacturing Process and Optimization #Robotic Mechanisms and Dynamics #cs.CG
paper · pdf · doi:10.48550/arxiv.1906.08455
20 pages
openalex publication_date 2019/06/20 · openalex created_date 2019/06/27 · arxiv created 2020/04/01 · arxiv updated 2020/04/02 · openalex updated_date 2026/07/28
Boundary representation (B-rep) model editing plays an essential role in computer-aided design and motivates the very recent direct modeling paradigm, which features intuitive push-pull manipulation of the model geometry. In mechanical design, a substantial part of B-rep models being used are quadric models (composed of linear and quadric surfaces). However, push-pulling such models is not trivial due to the possible smooth face-face connections in the models. The major issue is that, during push-pull moves, it is often desirable to preserve these connections for functional, manufacturing, or aesthetic reasons, but this could cause complex inconsistencies between the geometry and topology in the model and lead to robustness issues in updating the model. The challenge lies in effectiveness towards detecting the instants when geometry-topology inconsistencies occur during push-pull moves. This paper proposes a novel reverse detection method to solve the challenge and then, based on it, presents a robust method for push-pull direct modeling while preserving smooth connections. Case studies and comparisons have been conducted to demonstrate the effectiveness of the method.