Harmonograph
Generates patterns like a real harmonograph.
This was just a fun project to work on. It generates a complex parametric equation from input JSON files, and animates the resulting function. It can also save the final image to a file. There are some pre-made JSON files with interesting results in Harmonograph/Presets.
sparse2.json
sparse.json
It is also possible to set the lines to be transparent, which can have interesting results when the friction is set very low:
