Volume Preserving FFD for Programmable Graphics Hardware

Stefanie Hahmann 1, * Georges-Pierre Bonneau 2 Sébastien Barbier 3 Gershon Elber 4 Hans Hagen 5
* Auteur correspondant
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
2 MAVERICK - Models and Algorithms for Visualization and Rendering
LJK - Laboratoire Jean Kuntzmann, INPG - Institut National Polytechnique de Grenoble , Inria Grenoble - Rhône-Alpes
Abstract : Free Form Deformation (FFD) is a well established technique for deforming arbitrary object shapes in space. Although more recent deformation techniques have been introduced, amongst them skeleton-based deformation and cage based deformation, the simple and versatile nature of FFD is a strong advantage, and justifies its presence in nowadays leading commercial geometric modeling and animation software systems. Since its introduction in the late 80's, many improvements have been proposed to the FFD paradigm, including control lattices of arbitrary topology, direct shape manipulation and GPU implementation. Several authors have addressed the problem of volume preserving FFD. These previous approaches either make use of expensive non-linear optimization techniques, or resort to first order approximation suitable only for small-scale deformations. In this paper we take advantage from the multi-linear nature of the volume constraint in order to derive a simple, exact and explicit solution to the problem of volume preserving FFD. Two variants of the algorithm are given, without and with direct shape manipulation. Moreover, the linearity of our solution enables to implement it efficiently on GPU.
Type de document :
Article dans une revue
Visual Computer, Springer Verlag, 2012, 28 (3), pp.231-245. <10.1007/s00371-011-0608-5>



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Dernière modification le : mardi 15 juillet 2014 - 21:48:07
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Stefanie Hahmann, Georges-Pierre Bonneau, Sébastien Barbier, Gershon Elber, Hans Hagen. Volume Preserving FFD for Programmable Graphics Hardware. Visual Computer, Springer Verlag, 2012, 28 (3), pp.231-245. <10.1007/s00371-011-0608-5>. <hal-00599442v2>

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