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Dynamic Real-Time Deformations using Space Time Adaptive Sampling (2001)
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BibTeX
@MISC{Debunne01dynamicreal-time,
author = {Gilles Debunne and Mathieu Desbrun and Marie-Paule Cani and Alan H. Barr},
title = {Dynamic Real-Time Deformations using Space Time Adaptive Sampling },
year = {2001}
}
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Abstract
This paper presents a robust, adaptive method for animating dynamic visco-elastic deformable objects that provides a guaranteed frame rate. Our approach uses a novel automatic space and time adaptive level of detail technique, in combination with a largedisplacement (Green) strain tensor formulation. The body is partitioned in a non-nested multiresolution hierarchy of tetrahedral meshes. The local resolution is determined by a quality condition that indicates where and when the resolution is too coarse. As the object moves and deforms, the sampling is refined to concentrate the computational load into the regions that deform the most. Our model consists of a continuous differential equation that is solved using a local explicit finite element method. We demonstrate that our adaptive Green strain tensor formulation suppresses unwanted artifacts in the dynamic behavior, compared to adaptive mass-spring and other adaptive approaches. In particular, damped elastic vibration modes are shown to be nearly unchanged for several levels of refinement. Results are presented in the context of a virtual reality system. The user interacts in real-time with the dynamic object through the control of a rigid tool, attached to a haptic device driven with forces derived from the method.
Keyphrases
space time adaptive dynamic real-time deformation haptic device time adaptive level object move guaranteed frame rate quality condition dynamic object tetrahedral mesh detail technique virtual reality system adaptive method non-nested multiresolution hierarchy dynamic behavior novel automatic space strain tensor formulation rigid tool continuous differential equation adaptive approach several level dynamic visco-elastic deformable object computational load elastic vibration mode local resolution local explicit finite element method
