Specification of freeform features

Authors:
Eelco van den Berg;Hilderick A. van der Meiden;Willem F. Bronsvoort
Affiliations:
Delft University of Technology, The Netherlands;Delft University of Technology, The Netherlands;Delft University of Technology, The Netherlands
Venue:
SM '03 Proceedings of the eighth ACM symposium on Solid modeling and applications
Year:
2003

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Abstract

Freeform feature modeling is an extension to feature modeling in which, in addition to regular-shaped features, also freeform features are possible. Due to the large variety of freeform features, a generic approach to specify such features is required. This paper describes such an approach. A freeform feature class is specified by using a prototype and constraints. The latter are used to define intuitive parameters and validity conditions for the class. A new, prototype-driven constraint solving method is used to unambiguously determine a freeform feature during the specification both of a class and of an instance to be added to a model. The specification of freeform features and the prototype-driven constraint solving method are discussed. Several examples are given.