Mutable elastic models for sculpting structured shapes

Antoine Milliez 1, 2, * Michael Wand 2, 3 Marie-Paule Cani 1 Hans-Peter Seidel 2
* Corresponding author
1 IMAGINE - Intuitive Modeling and Animation for Interactive Graphics & Narrative Environments
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble
Abstract : In this paper, we propose a new paradigm for free-form shape deformation. Standard deformable models minimize an energy measuring the distance to a single target shape. We propose a new, "mutable" elastic model. It represents complex geometry by a collection of parts and measures the distance of each part measures to a larger set of alternative rest configurations. By detecting and reacting to local switches between best-matching rest states, we build a 3D sculpting system: It takes a structured shape consisting of parts and replacement rules as input. The shape can subsequently be elongated, compressed, bent, cut, and merged within a constraints-based free-form editing interface, where alternative rest-states model to such changes. In practical experiments, we show that the approach yields a surprisingly intuitive and easy to implement interface for interactively designing objects described by such discrete shape grammars, for which direct shape control mechanisms were typically lacking.
Keywords : Shape Interaction
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Journal articles
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Submitted on : Thursday, April 18, 2013 - 2:17:08 PM
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Antoine Milliez, Michael Wand, Marie-Paule Cani, Hans-Peter Seidel. Mutable elastic models for sculpting structured shapes. Computer Graphics Forum, Wiley, 2013, 32 (2pt1), pp.21-30. ⟨10.1111/cgf.12022⟩. ⟨hal-00797189v2⟩

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