Paper/patches/server/0072-Use-a-Shared-Random-for-Entities.patch
Nassim Jahnke 71c84c8132
Updated Upstream (Bukkit/CraftBukkit/Spigot) (#10277)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
9a80d38c SPIGOT-336, SPIGOT-3366, SPIGOT-5768, SPIGOT-6409, SPIGOT-6861, PR-722: Add EntityRemoveEvent
258086d9 SPIGOT-7417, PR-967: Add Sign#getTargetSide and Sign#getAllowedEditor
ffaba051 SPIGOT-7584: Add missing Tag.ITEMS_NON_FLAMMABLE_WOOD

CraftBukkit Changes:
98b6c1ac7 SPIGOT-7589 Fix NullPointerException when bans expire
a2736ddb0 SPIGOT-336, SPIGOT-3366, SPIGOT-5768, SPIGOT-6409, SPIGOT-6861, PR-1008: Add EntityRemoveEvent
5bf12cb89 SPIGOT-7565: Throw a more descriptive error message when a developer tries to spawn an entity from a CraftBukkit class
76d95fe7e SPIGOT-7417, PR-1343: Add Sign#getTargetSide and Sign#getAllowedEditor

Spigot Changes:
e9ec5485 Rebuild patches
f1b62e0c Rebuild patches
2024-02-23 14:37:33 +01:00

114 lines
4.7 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 22 Mar 2016 00:33:47 -0400
Subject: [PATCH] Use a Shared Random for Entities
Reduces memory usage and provides ensures more randomness, Especially since a lot of garbage entity objects get created.
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 4dc659760272a13fc8c0f05c543bed634784af6c..93dc90cc4e90d9db4712efff80f811d7c9d55caa 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -166,6 +166,79 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
return tag.contains("Bukkit.updateLevel") && tag.getInt("Bukkit.updateLevel") >= level;
}
+ // Paper start - Share random for entities to make them more random
+ public static RandomSource SHARED_RANDOM = new RandomRandomSource();
+ private static final class RandomRandomSource extends java.util.Random implements net.minecraft.world.level.levelgen.BitRandomSource {
+ private boolean locked = false;
+
+ @Override
+ public synchronized void setSeed(long seed) {
+ if (locked) {
+ LOGGER.error("Ignoring setSeed on Entity.SHARED_RANDOM", new Throwable());
+ } else {
+ super.setSeed(seed);
+ locked = true;
+ }
+ }
+
+ @Override
+ public RandomSource fork() {
+ return new net.minecraft.world.level.levelgen.LegacyRandomSource(this.nextLong());
+ }
+
+ @Override
+ public net.minecraft.world.level.levelgen.PositionalRandomFactory forkPositional() {
+ return new net.minecraft.world.level.levelgen.LegacyRandomSource.LegacyPositionalRandomFactory(this.nextLong());
+ }
+
+ // these below are added to fix reobf issues that I don't wanna deal with right now
+ @Override
+ public int next(int bits) {
+ return super.next(bits);
+ }
+
+ @Override
+ public int nextInt(int origin, int bound) {
+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextInt(origin, bound);
+ }
+
+ @Override
+ public long nextLong() {
+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextLong();
+ }
+
+ @Override
+ public int nextInt() {
+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextInt();
+ }
+
+ @Override
+ public int nextInt(int bound) {
+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextInt(bound);
+ }
+
+ @Override
+ public boolean nextBoolean() {
+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextBoolean();
+ }
+
+ @Override
+ public float nextFloat() {
+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextFloat();
+ }
+
+ @Override
+ public double nextDouble() {
+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextDouble();
+ }
+
+ @Override
+ public double nextGaussian() {
+ return super.nextGaussian();
+ }
+ }
+ // Paper end - Share random for entities to make them more random
+
private CraftEntity bukkitEntity;
public CraftEntity getBukkitEntity() {
@@ -362,7 +435,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, S
this.bb = Entity.INITIAL_AABB;
this.stuckSpeedMultiplier = Vec3.ZERO;
this.nextStep = 1.0F;
- this.random = RandomSource.create();
+ this.random = SHARED_RANDOM; // Paper - Share random for entities to make them more random
this.remainingFireTicks = -this.getFireImmuneTicks();
this.fluidHeight = new Object2DoubleArrayMap(2);
this.fluidOnEyes = new HashSet();
diff --git a/src/main/java/net/minecraft/world/entity/animal/Squid.java b/src/main/java/net/minecraft/world/entity/animal/Squid.java
index 891d8b4c8cb73d5e310970066831ab3e2af14e91..4f32597c7af34d599f6658fe4962d41624e60419 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Squid.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Squid.java
@@ -44,7 +44,7 @@ public class Squid extends WaterAnimal {
public Squid(EntityType<? extends Squid> type, Level world) {
super(type, world);
- this.random.setSeed((long)this.getId());
+ //this.random.setSeed((long)this.getId()); // Paper - Share random for entities to make them more random
this.tentacleSpeed = 1.0F / (this.random.nextFloat() + 1.0F) * 0.2F;
}