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Don't use level random in entity constructors (#8122)

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Jake Potrebic 2022-07-22 16:42:13 -07:00
parent edab698dbe
commit 656d32e99f
1 changed files with 63 additions and 0 deletions
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patches/server/Don-t-use-level-random-in-entity-constructors.patch Normal file
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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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Bee.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Bee.java
@@ -0,0 +0,0 @@ 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));
}
@@ -0,0 +0,0 @@ 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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
+++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
@@ -0,0 +0,0 @@ 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 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
+++ b/src/main/java/net/minecraft/world/entity/item/PrimedTnt.java
@@ -0,0 +0,0 @@ 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);