Join members of the OpenSim Team on Wednesday July 26th for an introduction to OpenSim and new tools for rapidly developing musculoskeletal simulations.

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1. Go to the OpenSim 4.4.1 release page here.
2. In the dropdown window under "Assets", select the distribution for your platform.
   
   1. Windows users: download opensim-core-4.4.1-win.zip. 
   2. Mac users: download opensim-core-4.4.1-mac.zip. 
3. Install OpenSim to a location of your choice; perhaps C:\opensim-core-4.4.1 (on Windows).
4. If you use WindowsThe next step is platform dependent:
   1. For Windows users, edit your PATH environment variable to include OpenSim’s bin directory (e.g.,
    
   1. C:\opensim-core-4.4.1\bin). See here for instructions. Make sure to remove any previous OpenSim installations from your PATH.

   2. For Mac users, authorize the OpenSim distribution by running the following command

      Code Block
      $ xattr -r -d com.apple.quarantine <opensim_install_directory>

      where <opensim_install_directory> is the directory where you unzipped the installation (e.g., /Applications/opensim-core-4.4.1/).

5. Configure OpenSim with Matlab by starting Matlab and starting Matlab and running configureOpenSim.m, located at C:\opensim-core-4.4.1\Resources\Code\Matlab.

6. After the script completes, restart Matlab and test the configuration by checking the timestamp from running 

   Code Block
   >> org.opensim.modeling.opensimCommon.GetVersionAndDate()

    in the Matlab command window; the date should be in July 2023.

7. Test that the visualizer is working by running the following:

   Code Block
   >> cd 'C:\opensim-core-4.4.1\Resources\Code\Matlab\Moco' >> exampleSlidingMass

   You should see a visualizer window appear with a sliding mass animation. Hit ESC twice to close the window.

8. Note for OpenSim 3.3 users: You cannot concurrently use OpenSim 3.3 and 4.4 in Matlab; to switch versions you must re-run configureOpenSim.m and edit your PATH environment variable.

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Visit the Moco website here.

Slides

TODO

Publications

Uhlrich SD, Falisse A, Kidzinski L, Muccini J, Ko M, Chaudhari AS, Hicks JL, Delp SL (2022) OpenCap: 3D human movement dynamics from smartphone videos. bioRxiv. https://doi.org/10.1101/2022.07.07.499061

Werling K, Bianco NA, Raitor M, Stingel J, Hicks JL, Collins SH, Delp SL, Liu CK (2023) AddBiomechanics: Automating model scaling, inverse kinematics, and inverse dynamics from human motion data through sequential optimization. bioRxiv. https://doi.org/10.1101/2023.06.15.545116

Dembia CL, Bianco NA, Falisse A, Hicks JL, Delp SL (2020) OpenSim Moco: Musculoskeletal optimal control. PLoS Comput Biol 16(12): e1008493. https://doi.org/10.1371/journal.pcbi.1008493

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