Research Papers

Geometric Constraint Solving in Parametric Computer-Aided Design

[+] Author and Article Information
Bernhard Bettig

Department of Mechanical Engineering,  West Virginia University, Institute of Technology Montgomery, WV 25136 e-mail: Bernhard.Bettig@mail.wvu.edu

Christoph M. Hoffmann

Department of Computer Science,  Purdue University, West Lafayette, IN 47907 e-mail: cmh@cs.purdue.edu

We use this term in the broadest sense.

J. Comput. Inf. Sci. Eng 11(2), 021001 (Jun 14, 2011) (9 pages) doi:10.1115/1.3593408 History: Received September 27, 2010; Revised March 10, 2011; Published June 14, 2011; Online June 14, 2011

With parametric computer-aided design (CAD) software, designers can create geometric models that are easily updated (within limits) by modifying the values of controlling parameters. These numeric and non-numeric parameters control the geometry in two ways: parametric operations and geometric constraint solving. This paper examines the advances over the last decade in the representation of parametric operations and of solving geometric constraint problems. An extensive literature has grown up surrounding geometric constraint solving and there has been substantial progress in the types of objects and constraints that can be handled robustly. Yet parametric operations have remained largely within the same conceptualization and begin to limit the flexibility of CAD systems, since they still do not align well with a systematic design process.

Copyright © 2011 by American Society of Mechanical Engineers
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Grahic Jump Location
Figure 1

Blended edge (a) small radius (b) error condition (c) tangency removed



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