Minecraft Bedrock Edition – How to Detect When an Arrow Faces a Player

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I'm trying to make it so that when I fire a bow it instantly kills the person I'm looking at, I know to do that I need to know where the arrow is facing and I have no clue how to do that.

Best Answer

If you need the arrow's direction to see if it will hit an entity to then kill it (as though you were looking at it), it would be the same as if it was you or any player, but it's with the arrow: in a repeating command block put /execute @e[type=arrow] ^ ^ ^1 execute @e[r=1] ~ ~ ~ kill @s. The ^ is taking where the entity is looking, so the ^ ^ ^1 is asking for the location where the arrow is facing. If you want the detection to last longer, you would need to duplicate the command, either into another command block or into a repeating function if you're making a behavior pack, and increase ^ ^ ^1 to ^ ^ ^2, etc.

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minecraft-java-edition – How to Make a Lightning Bow in Vanilla Minecraft

Since Arrows don't contain the data of what bow shot it from, we must mark the arrow as its being shot.

Setup:

/scoreboard objectives add Shot stat.useItem.minecraft.bow
/scoreboard objectives add Holding dummy
/scoreboard objectives add LightingArrow dummy
/scoreboard objectives add InGround dummy

Clock(20tps)

/scoreboard players set @a Holding 0
/scoreboard players set @a Holding 1 {SelectedItem:{tag:{display:{Name:"Lightning Bow"}}}}
/execute @a[score_Shot_min=1,score_Holding_min=1] ~ ~ ~ scoreboard players set @e[type=Arrow,r=2] LightingArrow 1
/scoreboard players set @e[type=Arrow] InGround 1 {inGround:1b}
/execute @e[type=Arrow,score_LightingArrow_min=1,score_InGround_min=1] ~ ~ ~ summon LightningBolt ~ ~ ~
/kill @e[type=Arrow,score_LightingArrow_min=1,score_InGround_min=1]
/scoreboard players set @a Shot 0

Minecraft – Is it possible to detect in which way the player is facing at exactly and store it

Assuming 1.13.

To store player's rotation, use execute store:

execute store result score rot0 store run data get entity @p Rotation[0] 1000000
execute store result score rot1 store run data get entity @p Rotation[1] 1000000

which stores his rotation in multidegree

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Related Solutions

minecraft-java-edition – How to Make a Lightning Bow in Vanilla Minecraft

Minecraft – Is it possible to detect in which way the player is facing at exactly and store it

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