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Real-time reduced large-deformation ...

Barbic, Jernej.

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Real-time reduced large-deformation models and distributed contact for computer graphics and haptics.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Real-time reduced large-deformation models and distributed contact for computer graphics and haptics./
Author:	Barbic, Jernej.
Description:	184 p.
Notes:	Adviser: Doug L. James.
Contained By:	Dissertation Abstracts International68-08B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3279452
ISBN:	9780549203131

Real-time reduced large-deformation models and distributed contact for computer graphics and haptics.
Barbic, Jernej.

Real-time reduced large-deformation models and distributed contact for computer graphics and haptics. - 184 p.

Adviser: Doug L. James.

Thesis (Ph.D.)--Carnegie Mellon University, 2007.

This thesis presents novel algorithms for deformable dynamics, collision detection and contact resolution between reduced nonlinear 3D deformable objects, for use in interactive computer graphics and haptics. The deformable models investigated are elastic, volumetric, and capable of undergoing large deformations. Each mesh vertex of a general 3D deformable object has three degrees of freedom. Non-interactive computation times result when simulating large-deformation dynamics of such unreduced systems (assuming non-trivial geometry). Reduced deformable objects are obtained by substituting these general degrees of freedom for a much smaller appropriately defined set of reduced degrees of freedom. This dimensionality reduction can enable much faster simulation times, with some loss of simulation accuracy. Many interesting objects can be well approximated by reduced deformations: swaying bridges, plants, tall buildings, mechanical components (hoses, wires), and human tissue (thigh passively deforming after a jump). The reduced deformable degrees of freedom need to be defined carefully so that they support "typical" large deformations. We present an automatic degree-of-freedom selection algorithm, and an algorithm for fast runtime simulation of the resulting reduced nonlinear dynamics for geometrically nonlinear deformable models.

ISBN: 9780549203131Subjects--Topical Terms:

1018410
Applied Mechanics.

Real-time reduced large-deformation models and distributed contact for computer graphics and haptics.
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020 $a 9780549203131
035 $a (UMI)AAI3279452
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040 $a UMI $c UMI
100 1 $a Barbic, Jernej. $3 1278472
245 1 0 $a Real-time reduced large-deformation models and distributed contact for computer graphics and haptics.
300 $a 184 p.
500 $a Adviser: Doug L. James.
500 $a Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5339.
502 $a Thesis (Ph.D.)--Carnegie Mellon University, 2007.
520 $a This thesis presents novel algorithms for deformable dynamics, collision detection and contact resolution between reduced nonlinear 3D deformable objects, for use in interactive computer graphics and haptics. The deformable models investigated are elastic, volumetric, and capable of undergoing large deformations. Each mesh vertex of a general 3D deformable object has three degrees of freedom. Non-interactive computation times result when simulating large-deformation dynamics of such unreduced systems (assuming non-trivial geometry). Reduced deformable objects are obtained by substituting these general degrees of freedom for a much smaller appropriately defined set of reduced degrees of freedom. This dimensionality reduction can enable much faster simulation times, with some loss of simulation accuracy. Many interesting objects can be well approximated by reduced deformations: swaying bridges, plants, tall buildings, mechanical components (hoses, wires), and human tissue (thigh passively deforming after a jump). The reduced deformable degrees of freedom need to be defined carefully so that they support "typical" large deformations. We present an automatic degree-of-freedom selection algorithm, and an algorithm for fast runtime simulation of the resulting reduced nonlinear dynamics for geometrically nonlinear deformable models.
520 $a Real-time deformable objects can be used to provide multi-sensory feedback in emerging real-time applications, such as 6-DOF (force and torque) haptic rendering. It is challenging to perform collision detection and compute contact forces and torques between geometrically complex objects at haptic rates. This thesis presents a CPU-based approach to simulate distributed contact between two (rigid or reduced-deformable) objects with complex geometry. Penalty-based contact forces are resolved using a multi-resolution point-based representation for one object, and a signed-distance field for the other. Our algorithm can adapt the contact force accuracy to both the difficulty of the current contact configuration and the speed of the particular computer. Reduced-deformed distance fields are proposed to support contact between reduced deformable objects. We also expose several important algorithmic details essential for stable and robust 6-DOF haptic rendering. Applications of our work include computer animation and games (including game haptics), CAD/CAM (virtual prototyping), and interactive virtual medicine.
590 $a School code: 0041.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Computer Science. $3 626642
650 4 $a Engineering, Robotics. $3 1018454
690 $a 0346
690 $a 0771
690 $a 0984
710 2 $a Carnegie Mellon University. $3 1018096
773 0 $t Dissertation Abstracts International $g 68-08B.
790 $a 0041
790 1 0 $a James, Doug L., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3279452