Post #2870353
2026-04-16 12:46 UTC
I had to write a homemade finite element method (FEM, https://en.wikipedia.org/wiki/Finite_element_method) solver to simulate the Gray-Scott model on this weirdo domain.
FEM solvers tend to throw up their hands and quit when you point them at non-manifold geometry like the folded and glued square, but I hollered at mine until it started behaving.
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@matt_zucker@mastodon.social 2026-04-16 12:47
And after a few extra hacks to mitigate some unpleasant visual artifacts, it all Just Works™. Of course I wrote an academic paper with all of the gory details – look for it in the upcoming Bridges 2026 conference proceedings. Here's a figure that gives a taste of what the software does.