Abstract
Current techniques for rigid body simulation run slowly on scenes with many bodies in close proximity. Each time two bodies collide or make or break a static contact, the simulator must interrupt the numerical integration of velocities and accelerations. Even for simple scenes, the number of discontinuities per frame time can rise to the millions. An efficient optimization-based animation (OBA) algorithm is presented which can simulate scenes with many convex three-dimensional bodies settling into stacks and other "crowded" arrangements. This algorithm simulates Newtonian (second order) physics and Coulomb friction, and it uses quadratic programming (QP) to calculate new positions, momenta and accelerations strictly at frame times. Contact points are synchronized at the end of each frame. The extremely small integration steps inherent to traditional simulation techniques are avoided. Non-convex bodies are simulated as unions of convex bodies. Links and joints are simulated successfully with bi-directional constraints. A hybrid of OBA and retroactive detection (RD) has been implemented as well. A review of existing work finds no other packages that can simulate similarly complex scenes in a practical amount of time.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of the ACM SIGGRAPH Conference on Computer Graphics |
| Pages | 37-46 |
| Number of pages | 10 |
| State | Published - 2001 |
| Event | Computer Graphics Annual Conference (SIGGRAPH 2001) - Los Angeles, CA, United States Duration: Aug 12 2001 → Aug 17 2001 |
Other
| Other | Computer Graphics Annual Conference (SIGGRAPH 2001) |
|---|---|
| Country | United States |
| City | Los Angeles, CA |
| Period | 8/12/01 → 8/17/01 |
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Keywords
- Animation
- Animation w/Constraints
- Physically Based Animation
- Physically Based Modeling
- Scientific Visualization
- Solid Modeling
ASJC Scopus subject areas
- Computer Science(all)
Cite this
Optimization-based animation. / Milenkovic, Victor; Schmidl, H.
Proceedings of the ACM SIGGRAPH Conference on Computer Graphics. 2001. p. 37-46.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Optimization-based animation
AU - Milenkovic, Victor
AU - Schmidl, H.
PY - 2001
Y1 - 2001
N2 - Current techniques for rigid body simulation run slowly on scenes with many bodies in close proximity. Each time two bodies collide or make or break a static contact, the simulator must interrupt the numerical integration of velocities and accelerations. Even for simple scenes, the number of discontinuities per frame time can rise to the millions. An efficient optimization-based animation (OBA) algorithm is presented which can simulate scenes with many convex three-dimensional bodies settling into stacks and other "crowded" arrangements. This algorithm simulates Newtonian (second order) physics and Coulomb friction, and it uses quadratic programming (QP) to calculate new positions, momenta and accelerations strictly at frame times. Contact points are synchronized at the end of each frame. The extremely small integration steps inherent to traditional simulation techniques are avoided. Non-convex bodies are simulated as unions of convex bodies. Links and joints are simulated successfully with bi-directional constraints. A hybrid of OBA and retroactive detection (RD) has been implemented as well. A review of existing work finds no other packages that can simulate similarly complex scenes in a practical amount of time.
AB - Current techniques for rigid body simulation run slowly on scenes with many bodies in close proximity. Each time two bodies collide or make or break a static contact, the simulator must interrupt the numerical integration of velocities and accelerations. Even for simple scenes, the number of discontinuities per frame time can rise to the millions. An efficient optimization-based animation (OBA) algorithm is presented which can simulate scenes with many convex three-dimensional bodies settling into stacks and other "crowded" arrangements. This algorithm simulates Newtonian (second order) physics and Coulomb friction, and it uses quadratic programming (QP) to calculate new positions, momenta and accelerations strictly at frame times. Contact points are synchronized at the end of each frame. The extremely small integration steps inherent to traditional simulation techniques are avoided. Non-convex bodies are simulated as unions of convex bodies. Links and joints are simulated successfully with bi-directional constraints. A hybrid of OBA and retroactive detection (RD) has been implemented as well. A review of existing work finds no other packages that can simulate similarly complex scenes in a practical amount of time.
KW - Animation
KW - Animation w/Constraints
KW - Physically Based Animation
KW - Physically Based Modeling
KW - Scientific Visualization
KW - Solid Modeling
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UR - http://www.scopus.com/inward/citedby.url?scp=0035148846&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0035148846
SP - 37
EP - 46
BT - Proceedings of the ACM SIGGRAPH Conference on Computer Graphics
ER -