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ROADMAP (SHORT-TERM)
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- crack_anylength texture, maybe something abstract like a hexagonal
  pie graph or something.
- Library functions for handling nodecore interactions.
	- Define node callbacks for extended actions, like
	  multipunch and sneak-multipunch.
	- Check-for-recipe util.
	- Wallmounted pop-off-as-item and item_entity overrides
	  to transform into falling node.
	- Flat-item node for tools and such: like sz_stuff_pile
	- Need punch-groups for controlling tool capabilities
	  necessary to multipunch; are damage groups usable here?
- Wood tech.
	- By hand, only dirt/sand can be dug, not trees/leaves.
		- Logs are level-2 choppy
		- Dirt converts to loose dirt, falling node.
	- Multi-punching leaves reveals branches.
	- Multi-punching branches breaks them into sticks.
		- Sticks are wallmounted, so they probably fall.
	- Combine a stick onto another stick to form a staff.
	- Craft an adze, combine a branch onto a stick.
		- Level 1 choppy
	- Adze can split logs on end into planks.
		- Level 1 choppy
	- Using planks on a staff forms tools as each plank is added:
		- Shovel, axe, pick.
		- Each is level 2, axe can dig logs
	- Leaves without a nearby log decay into either dead leaves or saplings
		- Both are falling nodes.
		- Dead leaves left on dirt/grass decay to nothing and convert
		  grass below to podzol
- Stone tech.
	- Dig up stone, ore using pick.
		- Converts to loose cobble / loose ore (hand-diggable, falling)
		- Tin, copper, iron.
	- Combine loose cobble onto staffs to form stone tools
		- Level 3
- Fire tech.
	- Create fire.
		- Place a stick atop a pile of dead leaves.
		- Multi-punch stick with staff, probabilistic success.
		- Convert leaves to cinder.
	- Cinder node:
		- Keeps track of fuel quantity and quality.
			- Quality in levels.
			- Natural wood (and leaf/stick) sources are level 1.
			- Duration/quantity in seconds, logs last longest.
		- Produces fire nodes above and on all sides where eligible.
		- Cannot be dug by hand, hurts.
		- May randomly convert to loose cinder (falling).
		- Converts to ash when exhausted (falling).
	- Fire node:
		- Requires at least one nearby air node or goes out.
		- Cannot be put out by hand, hurts.
		- Consume fuel quantity from burning cinder nodes below/beside, distribute
		  consumption semi-randomly.
		- Apply heat to all nodes above/beside.
			- Fuel nodes may convert to cinders if heated and air is present.
			- Heat quality combined from sum of fuel sources.
	- Smelting/cooking.
		- Create and try to contain a fire, place node above fire to cook.
		- Logs can be cooked (if smothered to prevent igniting) into charcoal (loose, falling).
		- Ores can be cooked, converting into slag and molten metal.
		- Different ores require different heat intensity.
			- Tin and copper easily accessible, may only require wood.
			- Iron requires an investment in charcoal.
	- Molten metal:
		- Flowing liquid, burns, ignition source.
		- Automatically quenched after some time.
		- If flows next to water, quench immediately at that location.
			- Ingot will replace water; be sure to use infinite spring.
		- Quenching:
			- Trace out network, find all sources.
				- Apply alloying recipes.
			- Remove source nodes.
			- Determine endpoint (in water, or random bottom node)
			- Invisible "waiting" entity waits until all molten nodes gone.
				- Places ingot at destination.
		- Ingots placed near molten metals will sometimes melt (for alloying).
		- Ingots can be re-melted above sufficiently-hot fire.
	- Metal tools from ingots:
		- Copper and tin, level 4
		- Bronze, level 5
		- Iron, level 6


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