It's barely usable/playable.
I'm not happy with how disjoint it is from the existing crafting
system, for little gain; there's a lot of on_nodepunch logic that
was added for this.
It also doesn't play very well. Major issues:
- Awkward collision with existing logic, e.g. taking things from
shelves, then drawing on side of shelf. Probably need a group
specifically for writable sufaces.
- Single action to rotate through all glyphs is bad. Probably
want one to change through the 8 shapes, and another to change
rotation/reflection.
- Erasure is awkward, inconsistent, and not necessarily reliable.
Should make it possible to recover charcoal in most cases, and
use a unified set of hooks for it...
Should glyphs be pointable and run logic directly on node, or
should we keep it point-through...?
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