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| HAL : inria-00518204, version 1 |
| DOI : 10.1145/1866158.1866159 |
| Voir la fiche détaillée |  BibTeX,EndNote,... |
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| ACM Transactions on Graphics 29, 6 (2010) 137-137:9 |
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| Stable Inverse Dynamic Curves |
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Alexandre Derouet-Jourdan 1, 2Florence Bertails-Descoubes 1 |
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| (12/2010) |
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| 2d animation is a traditional but fascinating domain that has recently regained popularity both in animated movies and video games. This paper introduces a method for automatically converting a smooth sketched curve into a 2d dynamic curve at stable equilibrium under gravity. The curve can then be physically animated to produce secondary motions in 2d animations or simple video games. Our approach proceeds in two steps. We first present a new technique to fit a smooth piecewise circular arcs curve to a sketched curve. Then we show how to compute the physical parameters of a dynamic rod model (super-circle) so that its stable rest shape under gravity exactly matches the fitted circular arcs curve. We demonstrate the interactivity and controllability of our approach on various examples where a user can intuitively setup efficient and precise 2d animations by specifying the input geometry. |
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| 1 : | BIPOP (INRIA Grenoble Rhône-Alpes / LJK Laboratoire Jean Kuntzmann) |
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INRIA – Laboratoire Jean Kuntzmann |
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| 2 : | ARTIS (INRIA Grenoble Rhône-Alpes / LJK Laboratoire Jean Kuntzmann) |
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CNRS : UMR5224 – INRIA – Laboratoire Jean Kuntzmann – Université Joseph Fourier - Grenoble I – Institut National Polytechnique de Grenoble (INPG) |
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| Domaine | : | Informatique/Synthèse d'image et réalité virtuelle Informatique/Modélisation et simulation |
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| 2d curve – inverse statics – elastica – stable equilibrium |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| inria-00518204, version 1 | |
| http://hal.inria.fr/inria-00518204 | |
| oai:hal.inria.fr:inria-00518204 | |
| Contributeur : Florence Bertails-Descoubes | |
| Soumis le : Jeudi 16 Septembre 2010, 17:20:08 | |
| Dernière modification le : Vendredi 22 Février 2013, 15:05:43 | |
