Implicit Skinning: Real-Time Skin Deformation with Contact Modeling

Rodolphe Vaillant, Loic Barthe, Gael Guennebaud, Marie-Paule Cani, Damien Rohmer, Brian Wyvill, Olivier Gourmel, Mathias Paulin
IRIT – Universite de Toulouse
hal-00819270, 2013


   title={Implicit Skinning: Real-Time Skin Deformation with Contact Modeling},

   author={Rodolphe, Vaillant and Barthe, Lo{"i}c and Guennebaud, Gael and Cani, Marie-Paule and Rohmer, Damien and Wyvill, Brian and Gourmel, Olivier and Paulin, Mathias and others},

   journal={ACM Transaction on Graphics (TOG). Proceedings of ACM SIGGRAPH},



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Geometric skinning techniques, such as smooth blending or dualquaternions, are very popular in the industry for their high performances, but fail to mimic realistic deformations. Other methods make use of physical simulation or control volume to better capture the skin behavior, yet they cannot deliver real-time feedback. In this paper, we present the first purely geometric method handling skin contact effects and muscular bulges in real-time. The insight is to exploit the advanced composition mechanism of volumetric, implicit representations for correcting the results of geometric skinning techniques. The mesh is first approximated by a set of implicit surfaces. At each animation step, these surfaces are combined in real-time and used to adjust the position of mesh vertices, starting from their smooth skinning position. This deformation step is done without any loss of detail and seamlessly handles contacts between skin parts. As it acts as a post-process, our method fits well into the standard animation pipeline. Moreover, it requires no intensive computation step such as collision detection, and therefore provides real-time performances.
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