Post #2870358
2026-04-16 12:58 UTC
@jannem@fosstodon.org not quite torus geometry. A torus is a manifold (https://en.wikipedia.org/wiki/Manifold) and my folded-square-thing is most definitely not.
Torus would be the same as the "Pac-Man" periodic boundary conditions I alluded to earlier. That gives two distinct edges that loosely correspond to the "equator" and "prime meridian" of the torus.
Yes for multiple patterns you need to have multiple sheets sharing the same edge.
(cont'd...)
Replies (2)
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@jannem@fosstodon.org 2026-04-16 12:59
@matt_zucker@mastodon.social Ah, you need a single edge, not two, for the one-tile case as well!
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@matt_zucker@mastodon.social 2026-04-16 13:00
@jannem@fosstodon.org Flips? Not sure how to deal with them with my folded-in-half (symmetric) edges, so I would have trouble answering this without thinking a lot harder.