Bag-of-Particles as a Deformable Model

Stahl, D.; Ezquerra, N.; Turk, G.

Bag-of-Particles as a Deformable Model

Files

141-150.pdf (6.04 MB)

Date

2002

Authors

Stahl, D.
Ezquerra, N.
Turk, G.

Publisher

The Eurographics Association

Abstract

We present an interactive, physically-based, elastically deformable model using a particle system to model surfaces with interior volumes that can be haptically felt. Oriented particles used in existing surface-only models, and unoriented particles used in volume-only simulations are combined to form a bag-of-particles. Multiple species of surface and volume particles, coupled with prede£ned interspecies parameters, determine the elastic properties of a bag. Starting with an object represented as a 3D voxel bitmap of connected components, the gradient of its distance map gives a vector £eld, or gradient map, that captures the static shape of an object and provides shape-maintaining forces. The gradient map enables the user to de£ne the geometry of the simulated objects, and provides feedback reaction forces allowing a user to feel the model. A bag-of-particles model can simulate several objects in the same scene, as well as objects composed of different materials, such as organs with multiple tissue types. We demonstrate the bag-of-particles approach using a number of different data sources, and apply it to modeling myocardium dynamics.

        @inproceedings{:10.2312/VisSym/VisSym02/141-150
,
booktitle = {Eurographics / IEEE VGTC Symposium on Visualization
},
editor = {D. Ebert and P. Brunet and I. Navazo
},
title = {{Bag-of-Particles as a Deformable Model
}},
author = {Stahl, D. and 
Ezquerra, N. and 
Turk, G.
},
year = {2002
},
publisher = {The Eurographics Association
},
ISSN = {1727-5296
},
ISBN = {1-58113-536-X
},
DOI = {/10.2312/VisSym/VisSym02/141-150
}
}