Author here. I wrote this many years ago (2017?) while exploring techniques to create art that I could put up on my walls :-) If you enjoyed this article there are more similar ones linked on the main page: https://sighack.com/
Great write up! I also dove in to this topic a while ago over at https://damoonrashidi.me/articles/flow-field-methods, but putting the live processing sketches in was a very nice touch! Good job, and nice outputs!
Does anyone know how some of these would relate to plotting random Polya vector fields ?
EDIT: so many lovely pages pointed to in the comments ! Mentioning a collective thanks to all rather than clutter this page with individual thanks.
@ttctciyf you are marked dead. Not sure why.