Technical Briefs

A Dual Environment for 3D Modeling With User-Defined Freeform Features

[+] Author and Article Information
Thomas R. Langerak

Image Sciences Institute, University Medical Center Utrecht, P.O. Box 85500, 3508 GA Utrecht, The Netherlands

Joris S. M. Vergeest

 Delft University of Technology, Landbergstraat 15, 2628 CE Delft, The Netherlands

J. Comput. Inf. Sci. Eng 9(2), 024503 (May 20, 2009) (3 pages) doi:10.1115/1.3130781 History: Received November 12, 2007; Revised September 22, 2008; Published May 20, 2009

Modeling with freeform features has become the standard in computer-aided design. Features offer a high-level approach to modeling shapes. However, in most commercial modeling packages, only a static set of freeform features is available. A new method for user-driven feature definition is presented, as well as a method to instantiate these user-defined features on a target surface. We propose the concept of a dual environment, in which the definition of a feature is maintained parallel to its instance on a target surface. This dual environment enables dynamic feature modeling, in which the user is able to change the definition of instantiated features on-the-fly.

Copyright © 2009 by American Society of Mechanical Engineers
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Grahic Jump Location
Figure 1

Different steps in the instantiation of a bump feature on a surface

Grahic Jump Location
Figure 2

Basic model (left) and predefined features (right)

Grahic Jump Location
Figure 3

(a) The model with instantiated features and (b) the model with modified feature definitions



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