PaperMC/paper-server/patches/features/0014-Check-distance-in-entity-interactions.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Mon, 2 Aug 2021 10:10:40 +0200
Subject: [PATCH] Check distance in entity interactions


diff --git a/net/minecraft/Util.java b/net/minecraft/Util.java
index ae1d53cefb9cede1c93cb8b22122a4a2d2d9a40c..80a7a85e1a03a1ca406259207e1ae3b909b3284f 100644
--- a/net/minecraft/Util.java
+++ b/net/minecraft/Util.java
@@ -130,6 +130,7 @@ public class Util {
         .findFirst()
         .orElseThrow(() -> new IllegalStateException("No jar file system provider found"));
     private static Consumer<String> thePauser = string -> {};
+    public static final double COLLISION_EPSILON = 1.0E-7; // Paper - Check distance in entity interactions
 
     public static <K, V> Collector<Entry<? extends K, ? extends V>, ?, Map<K, V>> toMap() {
         return Collectors.toMap(Entry::getKey, Entry::getValue);
diff --git a/net/minecraft/world/entity/LivingEntity.java b/net/minecraft/world/entity/LivingEntity.java
index 9bf5addb07f40cc50e80a46c0ee7944e938620fb..635e6e49483194c43b0ab47b5e1bacfe84613c3a 100644
--- a/net/minecraft/world/entity/LivingEntity.java
+++ b/net/minecraft/world/entity/LivingEntity.java
@@ -1385,7 +1385,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
                 this.hurtCurrentlyUsedShield(amount);
                 f1 = amount;
                 amount = 0.0F;
-                if (!damageSource.is(DamageTypeTags.IS_PROJECTILE) && damageSource.getDirectEntity() instanceof LivingEntity livingEntity) {
+                if (!damageSource.is(DamageTypeTags.IS_PROJECTILE) && damageSource.getDirectEntity() instanceof LivingEntity livingEntity && livingEntity.distanceToSqr(this) <= (200.0D * 200.0D)) { // Paper - Check distance in entity interactions
                     this.blockUsingShield(livingEntity);
                 }
 
@@ -1470,6 +1470,14 @@ public abstract class LivingEntity extends Entity implements Attackable {
                         d = damageSource.getSourcePosition().x() - this.getX();
                         d1 = damageSource.getSourcePosition().z() - this.getZ();
                     }
+                    // Paper start - Check distance in entity interactions; see for loop in knockback method
+                    if (Math.abs(d) > 200) {
+                        d = Math.random() - Math.random();
+                    }
+                    if (Math.abs(d1) > 200) {
+                        d1 = Math.random() - Math.random();
+                    }
+                    // Paper end - Check distance in entity interactions
 
                     this.knockback(0.4F, d, d1, damageSource.getDirectEntity(), damageSource.getDirectEntity() == null ? io.papermc.paper.event.entity.EntityKnockbackEvent.Cause.DAMAGE : io.papermc.paper.event.entity.EntityKnockbackEvent.Cause.ENTITY_ATTACK); // CraftBukkit // Paper - knockback events
                     if (!flag) {
@@ -2342,7 +2350,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
                 this.hurtCurrentlyUsedShield((float) -event.getDamage(DamageModifier.BLOCKING));
                 Entity entity = damageSource.getDirectEntity();
 
-                if (!damageSource.is(DamageTypeTags.IS_PROJECTILE) && entity instanceof LivingEntity) { // Paper - Fix shield disable inconsistency
+                if (!damageSource.is(DamageTypeTags.IS_PROJECTILE) && entity instanceof LivingEntity && entity.distanceToSqr(this) <= (200.0D * 200.0D)) { // Paper - Fix shield disable inconsistency & Check distance in entity interactions
                     this.blockUsingShield((LivingEntity) entity);
                 }
             }
diff --git a/net/minecraft/world/entity/vehicle/AbstractBoat.java b/net/minecraft/world/entity/vehicle/AbstractBoat.java
index 3bdb3b0984d0fee21b2c094e1d4c1f917ab68f92..54a4bf2f7df87b4a694187ade81ba158f83f0246 100644
--- a/net/minecraft/world/entity/vehicle/AbstractBoat.java
+++ b/net/minecraft/world/entity/vehicle/AbstractBoat.java
@@ -638,7 +638,7 @@ public abstract class AbstractBoat extends VehicleEntity implements Leashable {
             this.waterLevel = this.getY(1.0);
             double d2 = this.getWaterLevelAbove() - this.getBbHeight() + 0.101;
             if (this.level().noCollision(this, this.getBoundingBox().move(0.0, d2 - this.getY(), 0.0))) {
-                this.setPos(this.getX(), d2, this.getZ());
+                this.move(MoverType.SELF, new Vec3(0.0D, d2 - this.getY(), 0.0D)); // Paper - Check distance in entity interactions // TODO Still needed??
                 this.setDeltaMovement(this.getDeltaMovement().multiply(1.0, 0.0, 1.0));
                 this.lastYd = 0.0;
             }