Physical Human Movement Sketches

Fast Muscles, Rutgers.
- some focus on biological accuracy.
- Previous:
- Lines of Force; fail with large muscles with largg contacts.
- FEM/FVM. Difficult to *acquire*
- Approach: "Strand" - fiber-like
- "Unconditionally stable"
- Speed vs. visual accuracy vs. kinematic accuracy
- Cosserat theory of elastic rods. Rubin 200, Pai 2002
- Fibers are Segments divided by nodes. Nodes drive free-form controls that model the muscle volume.
- Separate models for tendons and muscles
- Hill-type muscle model -- Zajac 89., Teran 2003
- first-order numerical method
- "SVD" collisions become contact become equality constraints
- KKT

Interactive and Reactive Dynamic Control; Ari Shapiro
"Fah lout sauce"

"reactive skills"
control methods: kinematic(modifying mocap) vs. dyanmic control
"Fully interactive character"
- "mocap is probably necessary" "needed to do the complicated things that we want (the character) to do"
- "exploration" sytaste of physical control
- Mandel 04, Master's Thesis: Reactive Behaviors

ban De Panne - 2003, ski simulated; 2005, Zhao ***
"virtual humanoid"

RI: training wheels for learning

"i'd love to incorporate massive-like approaches"


Fast Volume Preseveration for Realistic Muscle Deformation.
RI: maybe a variation on the verlet tertrahedron would work for volume preservation in simulated muscles?