From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Jake Potrebic <jake.m.potrebic@gmail.com> Date: Sat, 19 Feb 2022 19:05:59 -0800 Subject: [PATCH] Fix cancelling ProjectileHitEvent for piercing arrows Piercing arrows search for multiple entities inside a while loop that is checking the projectile entity's removed state. If the hit event is cancelled on the first entity, the event will be called over and over again inside that while loop until the event is not cancelled. The solution here, is to make use of an already-existing field on AbstractArrow for tracking entities hit by piercing arrows to avoid duplicate damage being applied. == AT == protected net.minecraft.world.entity.projectile.Projectile hitCancelled diff --git a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java index 320ace815df1a76232df53d5ddeb3aef9b358d8e..758fa49f9b420fdbb583ca3443b81ca151478ea8 100644 --- a/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java +++ b/src/main/java/net/minecraft/world/entity/projectile/AbstractArrow.java @@ -345,6 +345,19 @@ public abstract class AbstractArrow extends Projectile { } + // Paper start - Fix cancelling ProjectileHitEvent for piercing arrows + @Override + public ProjectileDeflection preHitTargetOrDeflectSelf(HitResult hitResult) { + if (hitResult instanceof EntityHitResult entityHitResult && this.hitCancelled && this.getPierceLevel() > 0) { + if (this.piercingIgnoreEntityIds == null) { + this.piercingIgnoreEntityIds = new IntOpenHashSet(5); + } + this.piercingIgnoreEntityIds.add(entityHitResult.getEntity().getId()); + } + return super.preHitTargetOrDeflectSelf(hitResult); + } + // Paper end - Fix cancelling ProjectileHitEvent for piercing arrows + @Override protected double getDefaultGravity() { return 0.05D;