Files
Purpur/patches/server/0273-Add-toggle-for-RNG-manipulation.patch
Encode42 dad13788ad Updated Upstream (Paper)
Upstream has released updates that appear to apply and compile correctly

Paper Changes:
PaperMC/Paper@2040c1e Player Flying Fall Damage API (#5357)
PaperMC/Paper@fa42c68 Expose pre-collision moving velocity to VehicleBlockCollisionEvent (#8457)
PaperMC/Paper@90750a6 Rework filtering spawn egg and tile entity nbt config (#6613)
2022-12-29 00:19:27 -05:00

51 lines
3.0 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Encode42 <me@encode42.dev>
Date: Tue, 12 Jul 2022 14:16:10 -0400
Subject: [PATCH] Add toggle for RNG manipulation
Paper patches RNG maniplulation by using a shared (and locked) random source.
This comes with a performance gain, but technical players may prefer the ability to manipulate RNG.
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 59e97ef441aa51686f73769a073fccd7d263d246..6409e72cf4c6b8fbd21d1a97610160f604b8dc95 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -577,7 +577,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
this.bb = Entity.INITIAL_AABB;
this.stuckSpeedMultiplier = Vec3.ZERO;
this.nextStep = 1.0F;
- this.random = SHARED_RANDOM; // Paper
+ this.random = world == null || world.purpurConfig.entitySharedRandom ? SHARED_RANDOM : RandomSource.create(); // Paper // Purpur
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 21f5304e01e0844f1bbf3e1b2f9d50c01f8bf8fd..8afdb5d4fecbb45bad2ed801fc0e526d15ef07c5 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Squid.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Squid.java
@@ -46,7 +46,7 @@ public class Squid extends WaterAnimal {
public Squid(EntityType<? extends Squid> type, Level world) {
super(type, world);
- //this.random.setSeed((long) this.getId()); // Paper - we set the random to shared, do not clobber the seed
+ if (!world.purpurConfig.entitySharedRandom) this.random.setSeed((long) this.getId()); // Paper - we set the random to shared, do not clobber the seed // Purpur
this.tentacleSpeed = 1.0F / (this.random.nextFloat() + 1.0F) * 0.2F;
}
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index d03d3ee880c7907bd7f1223ab104bcdcb3f73d56..62bad1a35bae5fea6878e6734381cbbfe19e5673 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -207,9 +207,11 @@ public class PurpurWorldConfig {
public int entityLifeSpan = 0;
public float entityLeftHandedChance = 0.05f;
+ public boolean entitySharedRandom = true;
private void entitySettings() {
entityLifeSpan = getInt("gameplay-mechanics.entity-lifespan", entityLifeSpan);
entityLeftHandedChance = (float) getDouble("gameplay-mechanics.entity-left-handed-chance", entityLeftHandedChance);
+ entitySharedRandom = getBoolean("settings.entity.shared-random", entitySharedRandom);
}
public boolean infinityWorksWithoutArrows = false;