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authors SQin, S.F., Wright, D.K. and Jordanov, I.N.
year 2000
title From on-line sketching to 2D and 3D geometry: a system based on fuzzy knowledge
source Computer-Aided Design, Vol. 32 (14) (2000) pp. 851-866
summary The paper describes the development of a fuzzy knowledge-based prototype system for conceptual design. This real time system is designed to infer user's sketchingintentions, to segment sketched input and generate corresponding geometric primitives: straight lines, circles; arcs, ellipses, elliptical arcs, and B-spline curves. Topologyinformation (connectivity, unitary constraints and pairwise constraints) is received dynamically from 2D sketched input and primitives. From the 2D topology information, amore accurate 2D geometry can be built up by applying a 2D geometric constraint solver. Subsequently, 3D geometry can be received feature by feature incrementally. Eachfeature can be recognised by inference knowledge in terms of matching its 2D primitive configurations and connection relationships. The system accepts not only sketchedinput, working as an automatic design tool, but also accepts user interactive input of both 2D primitives and special positional 3D primitives. This makes it easy and friendlyto use. The system has been tested with a number of sketched inputs of 2D and 3D geometry.
keywords Conceptual Design, Geometric Modelling, Fuzzy Knowledge
series journal paper
references Content-type: text/plain
last changed 2003/05/15 19:33
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