Standarize drawing stickers of a twisty puzzle. From now on, there's no 'sticker drawing' code in the individual classes, only some constants.
Use a trick to avoid having to correct the center sticker of the Kilominx.
Convert the last 'special' case, the Rex edge sticker, to the generic sticker mechanism.
New sticker mechanism: improvements for concave stickers.
Convert the Rex corner sticker to the new mechanism.
Remove debugging.
Generalize FactorySticker - make it possible to draw stickers whose sides are curved.Convert the Ivy to use this new functionality.
Make the Pyraminxes a bit bigger by default - improvement.
Make the Pyraminxes a bit bigger by default.
Minor.
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