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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sun, 10 Jul 2022 14:13:22 -0700
Subject: [PATCH] Don't use level random in entity constructors
Paper makes the entity random thread-safe
and constructing an entity off the main thread
should be supported. Some entities (for whatever
reason) use the level's random in some places.
diff --git a/src/main/java/net/minecraft/world/entity/animal/Bee.java b/src/main/java/net/minecraft/world/entity/animal/Bee.java
index e5de2c1d11e5de88420caba35bf75c8bbd799db5..a9cdf9034ad269f7a71358443acc053288cfbe6d 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Bee.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Bee.java
@@ -1028,7 +1028,7 @@ public class Bee extends Animal implements NeutralMob, FlyingAnimal {
BeeGoToHiveGoal() {
super();
- this.travellingTicks = Bee.this.level.random.nextInt(10);
+ this.travellingTicks = Bee.this./* level. */random.nextInt(10); // Paper - use entity random
this.blacklistedTargets = Lists.newArrayList();
this.setFlags(EnumSet.of(Goal.Flag.MOVE));
}
@@ -1145,7 +1145,7 @@ public class Bee extends Animal implements NeutralMob, FlyingAnimal {
BeeGoToKnownFlowerGoal() {
super();
- this.travellingTicks = Bee.this.level.random.nextInt(10);
+ this.travellingTicks = Bee.this./* level. */random.nextInt(10); // Paper - use entity random
this.setFlags(EnumSet.of(Goal.Flag.MOVE));
}
diff --git a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
index 4c78c04ed031ec2e04642ebe5d79527e848d95f6..fcc5444a1268931a0fd2df1e6bbbc17cfd5a61e0 100644
--- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
+++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
@@ -64,7 +64,12 @@ public class ItemEntity extends Entity {
}
public ItemEntity(Level world, double x, double y, double z, ItemStack stack) {
- this(world, x, y, z, stack, world.random.nextDouble() * 0.2D - 0.1D, 0.2D, world.random.nextDouble() * 0.2D - 0.1D);
+ // Paper start - don't use world random in entity constructor
+ this(EntityType.ITEM, world);
+ this.setPos(x, y, z);
+ this.setDeltaMovement(this.random.nextDouble() * 0.2D - 0.1D, 0.2D, this.random.nextDouble() * 0.2D - 0.1D);
+ this.setItem(stack);
+ // Paper end
}
public ItemEntity(Level world, double x, double y, double z, ItemStack stack, double velocityX, double velocityY, double velocityZ) {
diff --git a/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java b/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
index 8101f358975b35b5a2dafbade3d14a910e408fa2..e09271450cae84f6206a20d6622918fe37380d59 100644
--- a/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
+++ b/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
@@ -35,7 +35,7 @@ public class PrimedTnt extends Entity {
public PrimedTnt(Level world, double x, double y, double z, @Nullable LivingEntity igniter) {
this(EntityType.TNT, world);
this.setPos(x, y, z);
- double d3 = world.random.nextDouble() * 6.2831854820251465D;
+ double d3 = this.random.nextDouble() * 6.2831854820251465D; // Paper - don't use world random in entity constructor
this.setDeltaMovement(-Math.sin(d3) * 0.02D, 0.20000000298023224D, -Math.cos(d3) * 0.02D);
this.setFuse(80);
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