mirror of https://github.com/PaperMC/Paper.git
114 lines
4.7 KiB
Diff
114 lines
4.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Tue, 22 Mar 2016 00:33:47 -0400
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Subject: [PATCH] Use a Shared Random for Entities
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Reduces memory usage and provides ensures more randomness, Especially since a lot of garbage entity objects get created.
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diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index 1cd40266418a3805f05b09c554d561e2e83822e5..bc098b6a9c0e3b19b9154ab3727949232bddb20a 100644
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--- a/src/main/java/net/minecraft/world/entity/Entity.java
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+++ b/src/main/java/net/minecraft/world/entity/Entity.java
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@@ -169,6 +169,79 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
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return tag.contains("Bukkit.updateLevel") && tag.getInt("Bukkit.updateLevel") >= level;
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}
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+ // Paper start - Share random for entities to make them more random
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+ public static RandomSource SHARED_RANDOM = new RandomRandomSource();
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+ private static final class RandomRandomSource extends java.util.Random implements net.minecraft.world.level.levelgen.BitRandomSource {
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+ private boolean locked = false;
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+
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+ @Override
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+ public synchronized void setSeed(long seed) {
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+ if (locked) {
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+ LOGGER.error("Ignoring setSeed on Entity.SHARED_RANDOM", new Throwable());
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+ } else {
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+ super.setSeed(seed);
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+ locked = true;
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+ }
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+ }
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+
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+ @Override
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+ public RandomSource fork() {
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+ return new net.minecraft.world.level.levelgen.LegacyRandomSource(this.nextLong());
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+ }
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+
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+ @Override
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+ public net.minecraft.world.level.levelgen.PositionalRandomFactory forkPositional() {
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+ return new net.minecraft.world.level.levelgen.LegacyRandomSource.LegacyPositionalRandomFactory(this.nextLong());
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+ }
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+
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+ // these below are added to fix reobf issues that I don't wanna deal with right now
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+ @Override
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+ public int next(int bits) {
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+ return super.next(bits);
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+ }
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+
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+ @Override
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+ public int nextInt(int origin, int bound) {
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+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextInt(origin, bound);
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+ }
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+
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+ @Override
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+ public long nextLong() {
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+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextLong();
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+ }
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+
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+ @Override
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+ public int nextInt() {
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+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextInt();
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+ }
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+
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+ @Override
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+ public int nextInt(int bound) {
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+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextInt(bound);
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+ }
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+
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+ @Override
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+ public boolean nextBoolean() {
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+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextBoolean();
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+ }
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+
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+ @Override
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+ public float nextFloat() {
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+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextFloat();
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+ }
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+
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+ @Override
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+ public double nextDouble() {
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+ return net.minecraft.world.level.levelgen.BitRandomSource.super.nextDouble();
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+ }
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+
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+ @Override
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+ public double nextGaussian() {
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+ return super.nextGaussian();
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+ }
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+ }
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+ // Paper end - Share random for entities to make them more random
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+
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private CraftEntity bukkitEntity;
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public CraftEntity getBukkitEntity() {
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@@ -364,7 +437,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
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this.bb = Entity.INITIAL_AABB;
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this.stuckSpeedMultiplier = Vec3.ZERO;
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this.nextStep = 1.0F;
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- this.random = RandomSource.create();
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+ this.random = SHARED_RANDOM; // Paper - Share random for entities to make them more random
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this.remainingFireTicks = -this.getFireImmuneTicks();
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this.fluidHeight = new Object2DoubleArrayMap(2);
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this.fluidOnEyes = new HashSet();
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diff --git a/src/main/java/net/minecraft/world/entity/animal/Squid.java b/src/main/java/net/minecraft/world/entity/animal/Squid.java
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index a98c7d9bf8dbaf9df51551fe66f7927798e9670f..43b4ea96c5c4a6234e5b83d41db9b85c1fe27b8f 100644
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--- a/src/main/java/net/minecraft/world/entity/animal/Squid.java
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+++ b/src/main/java/net/minecraft/world/entity/animal/Squid.java
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@@ -42,7 +42,7 @@ public class Squid extends WaterAnimal {
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public Squid(EntityType<? extends Squid> type, Level world) {
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super(type, world);
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- this.random.setSeed((long)this.getId());
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+ //this.random.setSeed((long)this.getId()); // Paper - Share random for entities to make them more random
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this.tentacleSpeed = 1.0F / (this.random.nextFloat() + 1.0F) * 0.2F;
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}
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