World & blocks · Step
Place if empty
Put a block at a location only when nothing is there, so it never replaces what's built.
m.world.set_block_if_empty
In a flow
“When a player uses a command → Place if empty: minecraft:torch at Player location.”
When a player uses a command → Place if empty: minecraft:torch at Player location.
What it does
Put a block at a location only when nothing is there, so it never replaces what's built. It's a step: it runs when the white wire reaches it, then the flow carries on from its Then pin. It gives 1 value later steps can use. Find it under World & blocks in the palette.
When to use it
Use it when the flow needs to: put a block at a location only when nothing is there, so it never replaces what's built.
When not to
If nothing should change in Discord, a value node or a check is lighter.
Typical wiring
Sockets: settings you can wire
- Where Location
-
Where: wire a location in, like Location from Player location, or type world x y z.
What goes there: Type it in the side panel, or wire in a location. e.g. world 10.5 64 -3.2
If it's empty: Optional. Left empty and unwired, the step runs without it.
Values it gives
- Placed Yes / no
-
True when the spot was empty and the block went in. e.g. true
If it's empty: Empty when the step didn't make one (it stopped early or was skipped); steps reading it get nothing.
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