I came up with some L systems for drawing hats and spectres based on the metatiles eg https://trinket.io/python/274cc18bd5 https://trinket.io/python/274cc18bd5

I came up with some L systems for drawing hats and spectres based on the metatiles eg https://trinket.io/python/274cc18bd5 https://trinket.io/python/274cc18bd5 https://trinket.io/python/108e28ab75 https://trinket.io/python/108e28ab75 (the second program has a bunch of variant versions) this cheats a little: it turns out you always want to draw the H8 metatile (which will overlap) instead of keeping track of the zoo of metatiles. And the flipped hat is never drawn; it appears as a hole in the plot. Similar things happen with the spectre. This was all done so I could make a program small enough to fit in a toot to generate patches using the bbc microbot: https://mastodon.me.uk/@bbcmicrobot/110295593252210445 https://mastodon.me.uk/@bbcmicrobot/110295593252210445 (also for hand drawing hats, use a hexagonal grid under your tracing paper, since it's just an assembly of kites)