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SUMMARY:Real-time Deformable Objects: Graphics\, Haptics\, Sound\, Control
DTSTART:20090330T161500
DTSTAMP:20260406T172853Z
UID:f1f2708cb51d0b8e044a5074aa77c622f2d646e9db6fbd4ca2055ac4
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Jernej Barbic\, MIT\, USA\nReal-time deformable objects ar
 e an exciting research area in computer graphics\, with applications to co
 mputer games\, movie industry\, CAD/CAM\, and virtual medicine.  Deformabl
 e objects are well-understood in solid mechanics\, however the standard si
 mulation algorithms are too slow for interactive simulation with detailed 
 geometry.  How can we support real-time simulation on commodity workstatio
 ns\, while compromising physical correctness as little as possible?\n\nI w
 ill present reduced nonlinear deformable objects\, a novel class of deform
 able objects obtained by applying statistical model reduction to finite el
 ement models of nonlinear elasticity.  The idea is to replace the general 
 degrees of freedom of a deformable object for a much smaller set of reduce
 d degrees of freedom\, thereby trading accuracy for speed.  The reduced de
 grees of freedom incorporate geometric and material information\, and can 
 be chosen automatically from the first principles of continuum mechanics.\
 n\nI will also present a time-critical algorithm for deformable collision 
 detection\, and contact force computation between two reduced deformable (
 or rigid) objects with detailed geometry. The algorithm exploits reduction
  to achieve haptic update rates (1\,000 Hz)\, and can be applied to deform
 able object path planning\, virtual CAD/CAM\, or other high update rate si
 mulations in robotics.\n\nReduction can also provide fast deformable model
 s to drive real-time sound simulations. I will outline an algorithm where 
 both the mechanical vibrations (deformations) that cause sound\, and the s
 ound propagation (wave equation) into the surrounding air for detailed geo
 metries\, are simulated at audio rates (44\,100 Hz).\n\nFinally\, I will d
 iscuss ongoing research on how model reduction can be used not only for fa
 st forward simulation\, but also for fast control.\nSuch control enables f
 aster design of animations\, and can provide directable real-time interact
 ion in computer games.\n\nJ. Barbic's homepage
LOCATION:INM202
STATUS:CONFIRMED
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