minecraft-commandsminecraft-java-edition
I've been trying to set up a command block in a mine cart, that does damage when a player is above it and 15 blocks along the Z axis, but it has to use tildes, right now I'm using:
/effect @a[x=~0,y=~4,z=~15] minecraft:instant_damage
Edit:
/effect @a[dx=0,dy=7,dz=26] minecraft:instant_damage
Works perfectly! I put the cart to the edge of the room (The rooms are about 30 blocks wide), and put activator rails below the cart to trigger the command.
You will likely just want a minecart dispenser of one of the two formats (these ones use Powered Rails for the dispenser booster) which will then have additional track to move the dispensed cart up to where you want the button placed.
Hope this helps.
It would appear that if 2 TNT minecarts run into each other on a curve with sufficient speed, it will set them off.
Step 1: Build a loop.
Step 2: See if Minecarts explode when place next to each other.
Nope, looks like this is safe.
Step 3: See if Minecarts explode when across from each other.
Nope, this seems fine too.
Step 4: Try to make minecarts explode on straight sections.
This never set it off (this picture is different because I tried many times to figure out where it was exploding).
Step 5: Make minecarts crash on a curve.
Ah ha! This resulted in an explosion.
This did not happen every time the minecarts collided in the corner, so this seems to be somewhat randomly caused.
Further Science
Does it need to be 2 TNT carts?
No! In fact, regular Minecarts seemed to set off the TNT more frequently.
Also, chickens are friends, not food fireworks.
Best Answer
Tildes cannot be used in target selector arguments. You must instead use an execute command. This command should execute it as the command block minecart.