Meshless Shape and Motion Design for Multiple Deformable Objects

We present physically based algorithms for interactive deformable shape and motion modelling. We coarsely sample the objects with simulation nodes, and apply a meshless finite element method to obtain realistic deformations at interactive frame rates. This shape deformation algorithm is then used to...

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Veröffentlicht in:Computer graphics forum Jg. 29; H. 1; S. 43 - 59
Hauptverfasser: Adams, B., Wicke, M., Ovsjanikov, M., Wand, M., Seidel, H.-P., Guibas, L. J.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Oxford, UK Blackwell Publishing Ltd 01.03.2010
Schlagworte:
3-D graphics
animation design
Computer animation
deformable objects
Design
Finite element analysis
I.3.5 [Computational Geometry and Object Modeling]: Physically based modeling
I.3.7 [Three-Dimensional Graphics and Realism]: Animation
keyframe animation
meshless methods
Optimization algorithms
Simulation
Studies
ISSN:0167-7055, 1467-8659
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Zusammenfassung:We present physically based algorithms for interactive deformable shape and motion modelling. We coarsely sample the objects with simulation nodes, and apply a meshless finite element method to obtain realistic deformations at interactive frame rates. This shape deformation algorithm is then used to specify keyframe poses and a smooth interpolating motion is obtained by solving for an energy‐minimizing trajectory. We show how to handle collisions between different deformable objects as well as with static or moving scene objects. Secondary motion is added as a post‐process by running a meshless elastic solid simulation. We enforce precomputed trajectories using control forces computed using shape matching. Key to the efficiency of our method is a sparse deformation representation and an adaptive optimization algorithm that automatically introduces new degrees of freedom in problematic regions. An accurate temporal interpolation scheme that exactly recovers rigid motions keeps the number of unknowns low and achieves realistic deformations with very few keyframes. We also show how the algorithm allows combining purely physical simulation with keyframe‐based scripted animation. The presented results illustrate that our framework can handle complex shapes at interactive rates, making it a valuable tool for animators to realistically model deformable 3D shapes and their motion.
Bibliographie:istex:11D16FC2C198863E2ACED3635952F40DE51585F1
ark:/67375/WNG-SF964VJ0-M
ArticleID:CGF1536
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2009.01536.x