From 4059288ed7348a695c83f2bf1b16d0f8200d3def Mon Sep 17 00:00:00 2001
From: Mystiflow <mystiflow@gmail.com>
Date: Fri, 6 Jul 2018 13:21:30 +0100
Subject: [PATCH] Send nearby packets from world player list not server list


diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
index e940b4b273..0db1e83340 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -922,8 +922,25 @@ public abstract class PlayerList {
     }
 
     public void sendPacketNearby(@Nullable EntityHuman entityhuman, double d0, double d1, double d2, double d3, DimensionManager dimensionmanager, Packet<?> packet) {
-        for (int i = 0; i < this.players.size(); ++i) {
-            EntityPlayer entityplayer = (EntityPlayer) this.players.get(i);
+        // Paper start - Use world list instead of server list where preferable
+        sendPacketNearby(entityhuman, d0, d1, d2, d3, dimensionmanager, null, packet); // Retained for compatibility
+    }
+
+    public void sendPacketNearby(@Nullable EntityHuman entityhuman, double d0, double d1, double d2, double d3, WorldServer world, Packet<?> packet) {
+        sendPacketNearby(entityhuman, d0, d1, d2, d3, world.worldProvider.getDimensionManager(), world, packet);
+    }
+
+    public void sendPacketNearby(@Nullable EntityHuman entityhuman, double d0, double d1, double d2, double d3, DimensionManager dimensionmanager, @Nullable WorldServer world, Packet<?> packet) {
+        if (world == null && entityhuman != null && entityhuman.world instanceof WorldServer) {
+            world = (WorldServer) entityhuman.world;
+        }
+
+        List<? extends EntityHuman> players1 = world == null ? players : world.players;
+        for (int j = 0; j < players1.size(); ++j) {
+            EntityHuman entity = players1.get(j);
+            if (!(entity instanceof EntityPlayer)) continue;
+            EntityPlayer entityplayer = (EntityPlayer) entity;
+            // Paper end
 
             // CraftBukkit start - Test if player receiving packet can see the source of the packet
             if (entityhuman != null && entityhuman instanceof EntityPlayer && !entityplayer.getBukkitEntity().canSee(((EntityPlayer) entityhuman).getBukkitEntity())) {
@@ -931,7 +948,7 @@ public abstract class PlayerList {
             }
             // CraftBukkit end
 
-            if (entityplayer != entityhuman && entityplayer.dimension == dimensionmanager) {
+            if (entityplayer != entityhuman && (world != null || entityplayer.dimension == dimensionmanager)) { // Paper
                 double d4 = d0 - entityplayer.locX;
                 double d5 = d1 - entityplayer.locY;
                 double d6 = d2 - entityplayer.locZ;
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 168e19b206..d11d01d739 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -1179,7 +1179,7 @@ public class WorldServer extends World {
         }
         // CraftBukkit end
         this.globalEntityList.add(entitylightning);
-        this.server.getPlayerList().sendPacketNearby((EntityHuman) null, entitylightning.locX, entitylightning.locY, entitylightning.locZ, 512.0D, this.worldProvider.getDimensionManager(), new PacketPlayOutSpawnEntityWeather(entitylightning));
+        this.server.getPlayerList().sendPacketNearby((EntityHuman) null, entitylightning.locX, entitylightning.locY, entitylightning.locZ, 512.0D, this, new PacketPlayOutSpawnEntityWeather(entitylightning)); // Paper - use world instead of dimension
     }
 
     @Override
@@ -1311,7 +1311,7 @@ public class WorldServer extends World {
             BlockActionData blockactiondata = (BlockActionData) this.J.removeFirst();
 
             if (this.a(blockactiondata)) {
-                this.server.getPlayerList().sendPacketNearby((EntityHuman) null, (double) blockactiondata.a().getX(), (double) blockactiondata.a().getY(), (double) blockactiondata.a().getZ(), 64.0D, this.worldProvider.getDimensionManager(), new PacketPlayOutBlockAction(blockactiondata.a(), blockactiondata.b(), blockactiondata.c(), blockactiondata.d()));
+                this.server.getPlayerList().sendPacketNearby((EntityHuman) null, (double) blockactiondata.a().getX(), (double) blockactiondata.a().getY(), (double) blockactiondata.a().getZ(), 64.0D, this, new PacketPlayOutBlockAction(blockactiondata.a(), blockactiondata.b(), blockactiondata.c(), blockactiondata.d()));
             }
         }
 
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 73e0e47a61..8499bad15b 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1909,7 +1909,7 @@ public class CraftWorld implements World {
         double z = loc.getZ();
 
         PacketPlayOutCustomSoundEffect packet = new PacketPlayOutCustomSoundEffect(new MinecraftKey(sound), SoundCategory.valueOf(category.name()), new Vec3D(x, y, z), volume, pitch);
-        world.getMinecraftServer().getPlayerList().sendPacketNearby(null, x, y, z, volume > 1.0F ? 16.0F * volume : 16.0D, this.world.getWorldProvider().getDimensionManager(), packet);
+        world.getMinecraftServer().getPlayerList().sendPacketNearby(null, x, y, z, volume > 1.0F ? 16.0F * volume : 16.0D, this.world, packet); // Paper - this.world.dimension -> this.world
     }
 
     @Override
-- 
2.21.0