Iron ore is distributed in sheets. The ore itself will not be
exposed to the air (or any other material other than stone) but
can be detected by the rusty tint it gives nearby rocks.
Iron ore is a stone that yields cobble infused with iron.
Smelting processes to produce steels are TBD.
There are 4 different states for things in the world:
- Regular node in world
- Item stack on ground
- Item entity (falling)
- Falling node entity
The entity states are not interactable at all, and regular node
doesn't rotate. We can help differentiate node-in-air vs
node-stack-on-ground with a shadow visual.
Sometimes a node will get stuck as an entity inside another node's
negative space (e.g. a nodebox) and having a way to tell that it's
not a real one should maybe help.
Right-clicking with an item now by default places one as a stack
node. When placing this way, crafting detection applies.
Had to copy in a bit of code from builtin.
Presumably this will change in the future, but it's also not
a given that we should have a falling or rotating version of the
tree (or that it should also split to planks).
