Position-based Elastic Rods

Umetani, Nobuyuki; Schmidt, Ryan; Stam, Jos

Position-based Elastic Rods

Files

021-030.pdf (17.32 MB)

appendix.pdf (2.19 MB)

sca2014_720p_hires.mov (88.34 MB)

Date

2014

Authors

Umetani, Nobuyuki
Schmidt, Ryan
Stam, Jos

Publisher

The Eurographics Association

Abstract

We present a novel method to simulate complex bending and twisting of elastic rods. Elastic rods are commonly simulated using force based methods, such as the finite element method. These methods are accurate, but do not directly fit into the more efficient position-based dynamics framework, since the definition of material frames are not entirely based on positions. We introduce ghost points, which are additional points defined on edges, to naturally endow continuous material frames on discretized rods. We achieve robustness by a novel discretization of the Cosserat theory. The method supports coupling with a frame, a triangle, and a rigid body at the rod's end point. Our formulation is highly efficient, capable of simulating hundreds of strands in real-time.

        @inproceedings{:10.2312/sca.20141119
https::/diglib.eg.org/handle/10.2312/sca.20141119.021-030
,
booktitle = {Eurographics/ ACM SIGGRAPH Symposium on Computer Animation
},
editor = {Vladlen Koltun and Eftychios Sifakis
},
title = {{Position-based Elastic Rods
}},
author = {Umetani, Nobuyuki and 
Schmidt, Ryan and 
Stam, Jos
},
year = {2014
},
publisher = {The Eurographics Association
},
ISSN = {1727-5288
},
ISBN = {978-3-905674-61-3
},
DOI = {/10.2312/sca.20141119
https://diglib.eg.org/handle/10.2312/sca.20141119.021-030
}
}