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2D Humanoid Walker js

This project is a reinforcement learning environment for node. You can train a model offline using tensorflow.js then deploy the result to the browser. And example is http://thinkcds.com/2d_walker/.

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Installation & Usage

  • git clone https://github.com/wassname/rl_2d_walker.js.git
  • npm install
  • npm i -g webpack-dev-server webpack
  • npm train: this will train in node
    • you ideally need a CUDA capable GPU with 8GB+ of memory.
    • will take 8 hours to see results, 44 hours for good results
  • npm start (in another terminal): this will start a server to view the results. Result will refresh every few hours when a model checkpoint in saved.

Modifying

  • The walker contains the physics of the ragdoll: see src/js/walker.js
  • The agent contains the reinforcement learning settings: search for new DDPGAgent in src/js/game.js, and also see src/js/ddpg/ddpg_agent.js

Contributing

  1. Fork it!
  2. Create your feature branch: git checkout -b my-new-feature
  3. Commit your changes: git commit -am 'Add some feature'
  4. Push to the branch: git push origin my-new-feature
  5. Submit a pull request :D

Credits

Future work

  • I would like to tweak the strength, stiffness (in box2d this seems to be max torque), friction, etc to allow a more elegant walking behaviour
  • Clean up the html UI

About

Teaching a humanoid to walk(ish), then displaying in your browser (using tensorflow.js and reinforcement learning)

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