Abstract
Physics-based animation has become a standard feature in modern
games. Typically, the bones in a character’s animation rig are
each associated with a simulated rigid body, leading to a jointed assembly
commonly called a ragdoll. The high density of animation
bones in the spine area can cause instability and performance issues,
so we are motivated to find a simplified physical representation for
this region.
We approximate the spine region of a ragdoll as an inextensible
elastic curve, building a circular arc constraint based on the Kirchhoff
rod model. Our simplified spine shows improved performance
and stability over the standard group of socket joints, and proves
to be more controllable. To model general elastic rods we use soft
position constraints in place of forces, leading to a stable maximal
coordinate formulation of inextensible Kirchhoff rods.
games. Typically, the bones in a character’s animation rig are
each associated with a simulated rigid body, leading to a jointed assembly
commonly called a ragdoll. The high density of animation
bones in the spine area can cause instability and performance issues,
so we are motivated to find a simplified physical representation for
this region.
We approximate the spine region of a ragdoll as an inextensible
elastic curve, building a circular arc constraint based on the Kirchhoff
rod model. Our simplified spine shows improved performance
and stability over the standard group of socket joints, and proves
to be more controllable. To model general elastic rods we use soft
position constraints in place of forces, leading to a stable maximal
coordinate formulation of inextensible Kirchhoff rods.
Original language | English |
---|---|
Title of host publication | SCA '13 Proceedings of the 12th ACM SIGGRAPH/Eurographics Symposium on Computer Animation |
Place of Publication | New York |
Publisher | Association for Computing Machinery |
Pages | 79-84 |
Number of pages | 6 |
ISBN (Print) | 9781450321327 |
DOIs | |
Publication status | Published - 2013 |
Event | Symposium on Computer Animation 2013 - Anaheim, California, USA United States Duration: 19 Jul 2013 → … |
Conference
Conference | Symposium on Computer Animation 2013 |
---|---|
Country/Territory | USA United States |
City | Anaheim, California |
Period | 19/07/13 → … |
Keywords
- rods
- ragdolls
- games
- rigid bodies