Using sketches and retrieval to create LEGO models

Authors:
Tiago Santos;Alfredo Ferreira;Filipe Dias;Manuel J. Fonseca
Affiliations:
Department of Computer Science and Engineering, INESC-ID, IST, Technical University of Lisbon, Lisboa, Portugal;Department of Computer Science and Engineering, INESC-ID, IST, Technical University of Lisbon, Lisboa, Portugal;Department of Computer Science and Engineering, INESC-ID, IST, Technical University of Lisbon, Lisboa, Portugal;Department of Computer Science and Engineering, INESC-ID, IST, Technical University of Lisbon, Lisboa, Portugal
Venue:
SBM'08 Proceedings of the Fifth Eurographics conference on Sketch-Based Interfaces and Modeling
Year:
2008

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Abstract

In this paper we describe a system to create LEGO models using sketches. Although there are a few applications to create LEGO models, they are difficult to use, mainly due to the searching and manipulation mechanisms that they (do not) offer. Here, we propose a sketch based approach, where users can easily insert parts, by specifying their dimensions through sketches and the system suggests a list of possible parts. To help with the modeling and the manipulation we also developed a constraint based mechanism, which keeps parts connected, performs snapto- grid and detects collisions. Experimental tests with users revealed that our approach is easier and faster to use than a conventional application, such as LeoCAD.