A mechanism for persistently naming topological entities in history-based parametric solid models
SMA '95 Proceedings of the third ACM symposium on Solid modeling and applications
What is a parametric family of solids?
SMA '95 Proceedings of the third ACM symposium on Solid modeling and applications
Necessary conditions for boundary representation variance
SCG '97 Proceedings of the thirteenth annual symposium on Computational geometry
Topological framework for part families
Proceedings of the seventh ACM symposium on Solid modeling and applications
A survey of the persistent naming problem
Proceedings of the seventh ACM symposium on Solid modeling and applications
Ontology-based feature mapping and verification between CAD systems
Advanced Engineering Informatics
Explicit reference modeling methodology in parametric CAD system
Computers in Industry
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In current feature-based parametric design systems, the reusability principle is not fully supported as it was expected. Unpredictability and ambiguity of models often happen during design modification within one system as well as among different systems. This reference deficiency significantly reduces the power of feature-based parametric modeling, where geometry re-evaluation generates unexpected shapes. In this paper, a sufficient condition of B-Rep variance based on geometry continuity in parametric complex Euclidean (P^pC^3) space is proposed. Shape and relation parameters are differentiated in P^pC^3, thus parametric family can be defined. A semantic id scheme based on continuity of geometry is developed to solve the problem of naming persistency and to improve interoperability of CAD feature modeling. Hierarchical namespaces localize entity creation and identification. All geometric and topological entities are referred uniformly based on surface ids, and topology semantics is retained in id itself.