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epicycler\n\n[![CircleCI](https://img.shields.io/circleci/project/github/nschloe/epicycler/master.svg)](https://circleci.com/gh/nschloe/epicycler/tree/master)\n[![codecov](https://img.shields.io/codecov/c/github/nschloe/epicycler.svg)](https://codecov.io/gh/nschloe/epicycler)\n[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/ambv/black)\n[![PyPi Version](https://img.shields.io/pypi/v/epicycler.svg)](https://pypi.org/project/epicycler)\n[![GitHub stars](https://img.shields.io/github/stars/nschloe/epicycler.svg?logo=github\u0026label=Stars)](https://github.com/nschloe/epicycler)\n\n![circles](https://nschloe.github.io/epicycler/circles.gif)\n\n[Epicylces](https://en.wikipedia.org/wiki/Deferent_and_epicycle) have been used for\nmillenia to describe the motion of planets; even\n[Copernicus](https://en.wikipedia.org/wiki/Nicolaus_Copernicus) still used them. They\ngot out of fashion when [Kepler](https://en.wikipedia.org/wiki/Johannes_Kepler)\nthought about ellipses, but one can still fool around with epicycles a bit. See\n[mathologer's awesome video about it](https://youtu.be/qS4H6PEcCCA) (which in fact\nmotivated this little package).\n\n### Installation\n\nepicycler is [available from the Python Package\nIndex](https://pypi.org/project/epicycler/), so simply type\n```\npip install -U epicycler\n```\nto install or upgrade.\n\n### Create animations from polygons\n\nGiven a number of 2D polygonal points, epicycler creates nice animations. For example,\nthe above is created with\n```bash\nepicycler-poly \\\n  0.0 0.0 \\\n  1.0 0.0 \\\n  1.0 2.0 \\\n  -0.5 1.1 \\\n  -0.5 2.1 \\\n  --xylim -1.5 +2.0 -1.3 3.0\n```\nSee\n```bash\nepicycler-poly -h\n```\nfor more options.\n\n### Create animations from image files\n![seagull](https://nschloe.github.io/epicycler/seagull.png)\n\nGiven a (small) linedrawing image file like the above seagull,\nepicycler can create an animation from it\n```bash\nepicycler-image in.png -c 0.5\n```\nUse the `-c` option for reducing the number of circles by cutting off those smaller than\nthe given threshold radius; notice then how the polygon points are not followed exactly:\n\n![seagull-gif](https://nschloe.github.io/epicycler/seagull.gif)\n\n\n### Creating a GIF\n\n```bash\nffmpeg -i out.mp4 -r 10 'frame-%03d.png'\nconvert -delay 5 -loop 0 frame-*.png out.gif\n```\n\n### Testing\n\nTo run the epicycler unit tests, check out this repository and type\n```\npytest\n```\n\n### Distribution\n\nTo create a new release\n\n1. bump the `__version__` number,\n\n2. publish to PyPi and GitHub:\n    ```\n    make publish\n    ```\n\n### License\n\nepicycler is published under the [MIT license](https://en.wikipedia.org/wiki/MIT_License).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnschloe%2Fepicycler","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fnschloe%2Fepicycler","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnschloe%2Fepicycler/lists"}