Large-scale dynamic simulation of highly constrained strands

Shinjiro Sueda, Garrett L. Jones, David I.W. Levin, Dinesh K. Pai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A significant challenge in applications of computer animation is the simulation of ropes, cables, and other highly constrained strandlike physical curves. Such scenarios occur frequently, for instance, when a strand wraps around rigid bodies or passes through narrow sheaths. Purely Lagrangian methods designed for less constrained applications such as hair simulation suffer from difficulties in these important cases. To overcome this, we introduce a new framework that combines Lagrangian and Eulerian approaches. The two key contributions are the reduced node, whose degrees of freedom precisely match the constraint, and the Eulerian node, which allows constraint handling that is independent of the initial discretization of the strand. The resulting system generates robust, efficient, and accurate simulations of massively constrained systems of rigid bodies and strands.

Original languageEnglish
Title of host publicationProceedings of ACM SIGGRAPH 2011, SIGGRAPH 2011
StatePublished - Jul 2011
Externally publishedYes
EventACM SIGGRAPH 2011, SIGGRAPH 2011 - Vancouver, BC, Canada
Duration: 7 Aug 201111 Aug 2011


ConferenceACM SIGGRAPH 2011, SIGGRAPH 2011
CityVancouver, BC


  • Constrained strands
  • Elastic rods
  • Lagrangian mechanics
  • Physically-based simulation
  • Thin solids


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