Computer Graphics Laboratory ETH Zurich


ChaCra: An Interactive Design System for Rapid Character Crafting

V. Megaro, B. Thomaszewski, D. Gauge, E. Grinspun, S. Coros, M. Gross

Proceedings of the 2014 ACM SIGGRAPH/Eurographics Symposium on Computer Animation (Copenhagen, Denmark, July 10-14, 2014), pp. 123--130
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We propose an interactive design system for rapid crafting of planar mechanical characters. Our method combines the simplicity of sketch-based modeling with the ease of defining motion through extreme poses. In order to translate digital designs into fabrication-ready descriptions, our method automatically computes the mechanical structure that makes the characters move as desired. We achieve real-time performance by limiting the mechanical structure between pairs of components to simple building blocks that define, trim, and propagate their motion. By focusing on shape and motion, our system emphasizes the creative aspects of character design while hiding away the intricacies of the underlying mechanical structure. We demonstrate the flexibility of our approach on a set of virtual designs and physical prototypes.

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author = {Vittorio Megaro and
Bernhard Thomaszewski and
Damien Gauge and
Eitan Grinspun and
Stelian Coros and
Markus H. Gross},
title = {ChaCra: An Interactive Design System for Rapid Character Crafting},
booktitle = {The Eurographics / {ACM} {SIGGRAPH} Symposium on Computer Animation,
{SCA} '14, Copenhagen, Denmark, 2014.},
pages = {123--130},
year = {2014},
crossref = {DBLP:conf/sca/2014},
url = {},
doi = {10.2312/sca.20141130},
timestamp = {Wed, 23 Jul 2014 14:20:52 +0200},
biburl = {},
bibsource = {dblp computer science bibliography,}
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