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Theses

Géométrie active pour l'animation et la modélisation

Damien Rohmer 1
1 EVASION - Virtual environments for animation and image synthesis of natural objects
Inria Grenoble - Rhône-Alpes, LJK - Laboratoire Jean Kuntzmann, Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology
Abstract : Generating visually realistic deformation of 3D objects in real-time for character body or garment is essential for the animation field, both for video games applications and movie production. Current fast deformation methods such as "skinning", or low resolution physically based simulations fail to capture some important natural behaviors. For instance constant volume deformation of a body, muscle bulging of a character, or wrinkling its garment which must be modeled by a developable surface. This thesis presents several methods making a geometrical models "active", that is to say able to maintain a certain number of intrinsic constraints of the surface linked to its bounded volume, or its developability. We develop three case studies - The addition of local volume constraints during skinning animation of a virtual creature. - The addition of wrinkles on garments to model stretch minimizing surface starting from a general low resolution animation provided as input. - The generation of folded paper looking surface based on length preservation with respect to its planar pattern. For every cases, we rely on a procedural approach based on progressive deformation, and eventually, on-the-fly refinement of the geometry just before the rendering stage.
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Damien Rohmer. Géométrie active pour l'animation et la modélisation. Mathématiques générales [math.GM]. Université de Grenoble, 2011. Français. ⟨NNT : 2011GRENM036⟩. ⟨tel-00635079⟩

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