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Like literally 3 hours ago I was searching for software that can simulate skeletons and joints to investigate the exact effects of jiu jitsu joint locks, optima

by roel_v 8y ago

Like literally 3 hours ago I was searching for software that can simulate skeletons and joints to investigate the exact effects of jiu jitsu joint locks, optimal fulcrum points etc. Could this be used or adapted for that? Anyone here ever used it?

mr_overalls 8y ago
Haven't used the software, but how about pitting intelligent agents against each other (incorporating reasonable models for vision, motor control, etc.) and evolving the optimal martial art? :-)
chatmasta 8y ago
I’ve also been searching for something like this, wondering if it could be applied to horse racing simulation.
- kidzik 8y ago
  Absolutely, however, you will need to construct a muscle model for horses. The human model is a result of decades of research, MRIs etc.
altvali 8y ago
I've participated in the NIPS "Learning to run" competition last year. It only computes motion in one direction (forward-backward, the model can't go left or right). What turned me off was the fact that object collision was handled poorly. You can't see a model that actually makes effort to avoid obstacles, instead all top solutions go through objects.
- roel_v 8y ago
  So all 'joints' only move in 2d, am I getting that right?
  - kidzik 8y ago
    In the 2017 challenge yes. This year we are using a 3d model.
- kidzik 8y ago
  That's only one-side of the story. It is actually a very accurate contact model. The problem is that it's also computationally expensive and therefore we reduce the stiffness of objects to make it faster. It's basically a trade-off between the accuracy and speed. In gaming engines you have speed and it looks good, but then it's impossible to generalize for real-life applications (because the contact is inaccurate).
  - electricslpnsld 8y ago
    > The problem is that it's also computationally expensive and therefore we reduce the stiffness of objects to make it faster. Are y'all using penalty methods for the collisions? Which model does it use?
nurettin 8y ago
I know a guy who is interested in that, take a look at this: https://github.com/Eelis/GrappleMap/blob/master/README.md https://github.com/Eelis/GrappleMap/blob/master/README.md
- roel_v 8y ago
  That's really cool, thanks for mentioning.
jcims 8y ago
Might find this interesting for extracting info from recorded bouts: https://github.com/CMU-Perceptual-Computing-Lab/openpose https://github.com/CMU-Perceptual-Computing-Lab/openpose

by roel_v 8y ago

mr_overalls 8y ago

Haven't used the software, but how about pitting intelligent agents against each other (incorporating reasonable models for vision, motor control, etc.) and evolving the optimal martial art? :-)

chatmasta 8y ago

I’ve also been searching for something like this, wondering if it could be applied to horse racing simulation.

kidzik 8y ago
Absolutely, however, you will need to construct a muscle model for horses. The human model is a result of decades of research, MRIs etc.

altvali 8y ago

I've participated in the NIPS "Learning to run" competition last year. It only computes motion in one direction (forward-backward, the model can't go left or right). What turned me off was the fact that object collision was handled poorly. You can't see a model that actually makes effort to avoid obstacles, instead all top solutions go through objects.

roel_v 8y ago
So all 'joints' only move in 2d, am I getting that right?
- kidzik 8y ago
  In the 2017 challenge yes. This year we are using a 3d model.
kidzik 8y ago
That's only one-side of the story. It is actually a very accurate contact model. The problem is that it's also computationally expensive and therefore we reduce the stiffness of objects to make it faster. It's basically a trade-off between the accuracy and speed. In gaming engines you have speed and it looks good, but then it's impossible to generalize for real-life applications (because the contact is inaccurate).
- electricslpnsld 8y ago
  > The problem is that it's also computationally expensive and therefore we reduce the stiffness of objects to make it faster. Are y'all using penalty methods for the collisions? Which model does it use?

nurettin 8y ago

I know a guy who is interested in that, take a look at this: https://github.com/Eelis/GrappleMap/blob/master/README.md https://github.com/Eelis/GrappleMap/blob/master/README.md

roel_v 8y ago
That's really cool, thanks for mentioning.

jcims 8y ago

Might find this interesting for extracting info from recorded bouts: https://github.com/CMU-Perceptual-Computing-Lab/openpose https://github.com/CMU-Perceptual-Computing-Lab/openpose