This repo contains the code for creating an animation of a Double Pendulum using Manim Community Edition

This guide assumes you have a resonably new version of python3 and pip installed.

To get started, we have to first install the necessary dependencies.

But before that we have to create and activate a virtual environment. See this for more information.

Once the virtualenv has been created, we can now proceed to install everything.

The requirements.txt contains all the dependencies. So install it using the following commands in the terminal:

1. cd path/to/folder/

2. pip install -r requirements.txt

Now check if manim is installed:

• manim --version

If the command throws no errors then manim has been installed successfully.

Now to compile the code use these commands:

• manim -pqh doublePend.py DoublePendulum

Here -pqh tells manim to render it in high quality (-ql flag) and to preview (-p flag) it after compilation.

Click here to see what CLI flags can be used to change render quality.

The following quantities can be configured in the __init__ function of the DoublePendulum class:

• masses of the balls,
• lengths of the rigid massless rods
• acceleration due to gravity
• initial angles
• factor that determines energy dissipation
• frame rate of the video
• how long the animation should run
• seconds history of the trail