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Paper/patches/server/0464-Improve-EntityTargetLivingEntityEvent-for-1.16-mobs.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Fri, 3 Jul 2020 15:03:33 -0700
Subject: [PATCH] Improve EntityTargetLivingEntityEvent for 1.16 mobs
CraftBukkit has a bug in their implementation and is incorrectly handling forget
Also adds more target reasons for why it forgot target.
diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/StopAttackingIfTargetInvalid.java b/src/main/java/net/minecraft/world/entity/ai/behavior/StopAttackingIfTargetInvalid.java
index 3210f8de59b8760fc48809bd451744b46119c0b0..85f8634edddd3b8a05cb3f89262032fb8c49b560 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/behavior/StopAttackingIfTargetInvalid.java
+++ b/src/main/java/net/minecraft/world/entity/ai/behavior/StopAttackingIfTargetInvalid.java
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@@ -50,15 +50,15 @@ public class StopAttackingIfTargetInvalid<E extends Mob> extends Behavior<E> {
LivingEntity entityliving = this.getAttackTarget(entity);
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if (!entity.canAttack(entityliving)) {
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- this.clearAttackTarget(entity);
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+ this.clearAttackTarget(entity, org.bukkit.event.entity.EntityTargetEvent.TargetReason.TARGET_INVALID); // Paper
} else if (StopAttackingIfTargetInvalid.isTiredOfTryingToReachTarget(entity)) {
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- this.clearAttackTarget(entity);
+ this.clearAttackTarget(entity, org.bukkit.event.entity.EntityTargetEvent.TargetReason.FORGOT_TARGET); // Paper
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} else if (this.isCurrentTargetDeadOrRemoved(entity)) {
- this.clearAttackTarget(entity);
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+ this.clearAttackTarget(entity, org.bukkit.event.entity.EntityTargetEvent.TargetReason.TARGET_DIED); // Paper
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} else if (this.isCurrentTargetInDifferentLevel(entity)) {
- this.clearAttackTarget(entity);
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+ this.clearAttackTarget(entity, org.bukkit.event.entity.EntityTargetEvent.TargetReason.TARGET_OTHER_LEVEL); // Paper
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} else if (this.stopAttackingWhen.test(this.getAttackTarget(entity))) {
- this.clearAttackTarget(entity);
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+ this.clearAttackTarget(entity, org.bukkit.event.entity.EntityTargetEvent.TargetReason.TARGET_INVALID); // Paper
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}
}
@@ -82,17 +82,20 @@ public class StopAttackingIfTargetInvalid<E extends Mob> extends Behavior<E> {
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return optional.isPresent() && !((LivingEntity) optional.get()).isAlive();
}
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- protected void clearAttackTarget(E entity) {
+ protected void clearAttackTarget(E entity, EntityTargetEvent.TargetReason reason) {
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// CraftBukkit start
- LivingEntity old = entity.getBrain().getMemory(MemoryModuleType.ATTACK_TARGET).orElse(null);
- EntityTargetEvent event = CraftEventFactory.callEntityTargetLivingEvent(entity, null, (old != null && !old.isAlive()) ? EntityTargetEvent.TargetReason.TARGET_DIED : EntityTargetEvent.TargetReason.FORGOT_TARGET);
+ // Paper start - fix this event
+ //EntityLiving old = e0.getBehaviorController().getMemory(MemoryModuleType.ATTACK_TARGET).orElse(null);
+ EntityTargetEvent event = CraftEventFactory.callEntityTargetLivingEvent(entity, null, reason);
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if (event.isCancelled()) {
return;
}
- if (event.getTarget() != null) {
- entity.getBrain().setMemory(MemoryModuleType.ATTACK_TARGET, ((CraftLivingEntity) event.getTarget()).getHandle());
+ // comment out, bad logic - bad
+ /*if (event.getTarget() != null) {
+ e0.getBehaviorController().setMemory(MemoryModuleType.ATTACK_TARGET, ((CraftLivingEntity) event.getTarget()).getHandle());
return;
- }
+ }*/
+ // Paper end
// CraftBukkit end
this.onTargetErased.accept(entity);
entity.getBrain().eraseMemory(MemoryModuleType.ATTACK_TARGET);