Journal ArticleDOI
Spacetime constraints
Andrew Witkin,Michael Kass +1 more
- pp 159-168
TLDR
This work presents as examples a Luxo lamp performing a variety of coordinated motions that conform to such principles of traditional animation as anticipation, squash-and-stretch, follow-through, and timing.Abstract:
Spacetime constraints are a new method for creating character animation. The animator specifies what the character has to do, for instance, "jump from here to there, clearing a hurdle in between;" how the motion should be performed, for instance "don't waste energy," or "come down hard enough to splatter whatever you land on;" the character's physical structure---the geometry, mass, connectivity, etc. of the parts; and the physical resources' available to the character to accomplish the motion, for instance the character's muscles, a floor to push off from, etc. The requirements contained in this description, together with Newton's laws, comprise a problem of constrained optimization. The solution to this problem is a physically valid motion satisfying the "what" constraints and optimizing the "how" criteria. We present as examples a Luxo lamp performing a variety of coordinated motions. These realistic motions conform to such principles of traditional animation as anticipation, squash-and-stretch, follow-through, and timing.read more
Citations
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Proceedings ArticleDOI
Iterative cage-based registration from multi-view silhouettes
TL;DR: This paper proposes a cage-based technique to register non-rigid observed shapes using a meaningful, reduced and animator-friendly embedding using an elastoplastic coarse cage, and performs scalable handle-aware biharmonic shape registration, relying on the high-level of shape abstraction offered by this space-based paradigm.
Journal Article
Learning the Stylistic Similarity Between Human Motions
Yu-Ren Chien,Jing-Sin Liu +1 more
TL;DR: A computational model of stylistic similarity between human motions that is statistically derived from a comprehensive collection of captured, stylistically similar motion pairs and is applied to a system for adapting an existing clip of human motion to a new environment.
Dissertation
Système d'animation d'objets virtuels : De la modélisation à la normalisation MPEG-4
TL;DR: Dans le cadre de la nouvelle societe de l'information multimedia and communicante, cette these propose des contributions methodologiques and techniques relatives a la representation, l'animation and the transmission des objets virtuels.
Proceedings ArticleDOI
A flexible representation of controllers for physically-based animation of virtual humans
TL;DR: A representation of controllers that uses high-level sensors and possesses a general and intuitive structure that offers several types of parameters, which can be modified by the animator or automatically, is proposed.
Journal ArticleDOI
Computational Design of Skinned Quad-Robots
TL;DR: In this paper, the authors present a computational design system that assists users to model, optimize, and fabricate quad-robots with soft skin, and the system addresses the task of predicting their physical behavior by fully integrating the multibody dynamics of the mechanical skeleton and the elastic behavior of the soft skin.
References
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Proceedings ArticleDOI
Elastically deformable models
TL;DR: The description of shape and the description of motion are unified and differential equations that model the behavior of non-rigid curves, surfaces, and solids as a function of time are constructed.
Journal ArticleDOI
Review of pseudoinverse control for use with kinematically redundant manipulators
Charles A. Klein,C.-H. Huang +1 more
TL;DR: Kinematically redundant manipulators have a number of potential advantages over current manipulator designs and velocity control through pseudoinverses is suggested for this type of arm.
Proceedings ArticleDOI
Principles of traditional animation applied to 3D computer animation
TL;DR: The basic principles of traditional 2D hand drawn animation and their application to 3D computer animation are described and how these principles evolved is described.