MuJoCo: Difference between revisions

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'''MuJoCo''' "''stands for Multi-Joint dynamics with Contact. It is a physics engine aiming to facilitate research and development in robotics, biomechanics, graphics and animation, and other areas where fast and accurate simulation is needed.''"
''MuJoCo stands for Multi-Joint dynamics with Contact. It is a physics engine aiming to facilitate research and development in robotics, biomechanics, graphics and animation, and other areas where fast and accurate simulation is needed.<ref>http://www.mujoco.org/</ref>''


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It is frequently used with the associated Python module <code>mujoco_py</code> as an environment for Reinforcement Learning research.
It is frequently used with the associated Python module <code>mujoco_py</code> as an environment for reinforcement learning (RL) research.


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==Installation== <!--T:6-->
==Installation== <!--T:6-->


=== Base Files === <!--T:2-->
=== Base files === <!--T:2-->


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First, the .mujoco folder in your home directory must be set up. MuJoCo '''requires a licence key''' to be placed in
First, the .mujoco folder in your home directory must be set up. MuJoCo '''requires a licence key''' to be placed in
~/.mujoco/mjkey.txt. This key obtained by e-mail after registration.
~/.mujoco/mjkey.txt. This key is obtained by e-mail after registration.


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The appropriate (linux) MuJoCo distribution must also be downloaded and unzipped into the ~/.mujoco directory from the Download section of the [https://www.roboti.us/index.html MuJoCo website].
The appropriate (Linux) MuJoCo distribution must also be downloaded and unzipped into the ~/.mujoco directory from the ''Download'' section of the [https://www.roboti.us/index.html MuJoCo website].


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The python interface to MuJoCo is the <code>mujoco_py</code> module. Getting it to work requires some special steps because library paths need to be patched.
The Python interface to MuJoCo is the <code>mujoco_py</code> module. Getting it to work requires some special steps because library paths need to be patched.


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After using <code>module</code> to load the desired python version, you should set up a clean virtualenv:
After using <code>module</code> to load the desired Python version, you should set up a clean virtual environment:


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|source mujoco_env/bin/activate
|source mujoco_env/bin/activate
}}
}}
Now, install the <code>mujoco_py</code> module:
1. Install the <code>mujoco_py</code> module.
{{Command
{{Command
|prompt=(mujoco_env) [name@server $]
|prompt=(mujoco_env) [name@server $]
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Now the paths need to be patched with setrpaths.sh. Use the appropriate python version in the commands below if it is not 3.5:
2. Patch the paths with setrpaths.sh. Use the appropriate python version in the commands below if it is not 3.5:


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Now run the following command:
3. Run the following command:


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It should have crashed. However, it created the necessary paths to run:
It should have crashed, but the necessary paths will have been reated to run:


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After that last command, mujoco_py should be ready to use in the virtual environment. If everything installed correctly, the command below should run without any errors:
After that last command, mujoco_py should be ready to use in the virtual environment. If everything is installed correctly, the command below should run without any errors:
{{Command
{{Command
|prompt=(mujoco_env) [name@server $]
|prompt=(mujoco_env) [name@server $]
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