Bag-of-Particles as a Deformable Model

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Date
2002
Journal Title
Journal ISSN
Volume Title
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.
Description

        
@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
} }
Citation