I was wondering how to execute a command relative to an entity in Minecraft using commands for a map I was working on. I am somewhat familiar with the use of the /execute command, but wanted to use the /summon to make a grenade using item drops or arrows, then have TNT summoned to the area that the item is in.
Minecraft – How to execute a command relative to an entity
minecraft-commandsminecraft-java-edition
Related Solutions
You can create a lightning stick using these commands in a command block:
/testfor @e[type=Player] {SelectedItemSlot:0}
/execute @e[type=*InsertMobNameHere*] ~ ~ ~ summon LightningBolt ~ ~ ~
You can also create lightning arrows:
/execute @e[type=Arrow,c11] ~ ~ ~ summon LightningBolt
/kill @e[type=Arrow]
To receive a command block, you can type in the command chat:
/give @p minecraft:command_block 64
Assuming you have the "sentry gun" shooting arrows, you would use the command:
/summon Arrow x y z {damage:1,Motion:[x.0,y.0,z.0]}
You would have to plug into the first set of coordinates where you want the arrows to be shooting from, and the direction the arrows are shooting in the second. TIP: The higher the number you set for your direction (second set of coordinates, the faster the arrow will travel! You can set anything for the damage (except dont get too crazy :P)
As for your "Tool Box" Idea, you can do the test for command on a redstone ticker:
testfor @e[x,y,z,r,type=Item] {Item:{id:minecraft:iron_block}}
(Unfortunately, you cant test for a custom named block/entity - at least to my knowledge) Run a comparator out of this command block, to another command block (does not NEED to be a command block). This will start a fast ticking redstone clock on another command block. This command block will have the command:
testfor @e[x,y+1,z,r,type=Item] {Item:{id:minecraft: ... }}
Make sure that the coordinates you plug into the last testfor command have y+1 the y coordinate of the testfor command before that. This means it will test for the item on top of your "tool box". Run a comparator out of that command block to start the /summon Arrow command, or in other words, start up your sentry!
(The arrows are seen only as little black dots in this photo, but thats because I have the speed ramped up :)
Basically, its a system of Testing positive for an iron block at x y z - starting ticker to test for ... entity at x y+1 z - testing positive for ... entity at x y+1 z - starting ticker to shoot "sentry gun"
Hope this helps
Best Answer
The
/executecommand is used to execute another command relative to something, the syntax you'll need is:You should use target selectors with selector arguments to select to entity you want to execute from.
To summon TNT from an item drop, you could do:
(Be careful with this command, as all item drops will act as a grenade)