Paper/patches/server/0321-Tracking-Range-Improvements.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: kickash32 <kickash32@gmail.com>
Date: Sat, 21 Dec 2019 15:22:09 -0500
Subject: [PATCH] Tracking Range Improvements

Sets tracking range of watermobs to animals instead of misc and simplifies code

Also ignores Enderdragon, defaulting it to Mojang's setting

diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
index bc481cf547504140a921ec20d7c21d2931b1e7ab..51cbdaead57a527bac5eeb7bc130f31667fcf450 100644
--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -1761,6 +1761,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
             while (iterator.hasNext()) {
                 Entity entity = (Entity) iterator.next();
                 int j = entity.getType().clientTrackingRange() * 16;
+                j = org.spigotmc.TrackingRange.getEntityTrackingRange(entity, j); // Paper
 
                 if (j > i) {
                     i = j;
diff --git a/src/main/java/org/spigotmc/TrackingRange.java b/src/main/java/org/spigotmc/TrackingRange.java
index 73f9563551632a5369ba55e8fe9211afc325e869..bb06f89a29f30144e7e2113e088a503db006a83c 100644
--- a/src/main/java/org/spigotmc/TrackingRange.java
+++ b/src/main/java/org/spigotmc/TrackingRange.java
@@ -7,7 +7,6 @@ import net.minecraft.world.entity.ExperienceOrb;
 import net.minecraft.world.entity.decoration.ItemFrame;
 import net.minecraft.world.entity.decoration.Painting;
 import net.minecraft.world.entity.item.ItemEntity;
-import net.minecraft.world.entity.monster.Ghast;
 
 public class TrackingRange
 {
@@ -30,22 +29,21 @@ public class TrackingRange
         if ( entity instanceof ServerPlayer )
         {
             return config.playerTrackingRange;
-        } else if ( entity.activationType == ActivationRange.ActivationType.MONSTER || entity.activationType == ActivationRange.ActivationType.RAIDER )
-        {
-            return config.monsterTrackingRange;
-        } else if ( entity instanceof Ghast )
-        {
-            if ( config.monsterTrackingRange > config.monsterActivationRange )
-            {
+        // Paper start - Simplify and set water mobs to animal tracking range
+        }
+        switch (entity.activationType) {
+            case RAIDER:
+            case MONSTER:
+            case FLYING_MONSTER:
                 return config.monsterTrackingRange;
-            } else
-            {
-                return config.monsterActivationRange;
-            }
-        } else if ( entity.activationType == ActivationRange.ActivationType.ANIMAL )
-        {
-            return config.animalTrackingRange;
-        } else if ( entity instanceof ItemFrame || entity instanceof Painting || entity instanceof ItemEntity || entity instanceof ExperienceOrb )
+            case WATER:
+            case VILLAGER:
+            case ANIMAL:
+                return config.animalTrackingRange;
+            case MISC:
+        }
+        if ( entity instanceof ItemFrame || entity instanceof Painting || entity instanceof ItemEntity || entity instanceof ExperienceOrb )
+        // Paper end
         {
             return config.miscTrackingRange;
         } else if ( entity instanceof Display )
@@ -53,6 +51,7 @@ public class TrackingRange
             return config.displayTrackingRange;
         } else
         {
+            if (entity instanceof net.minecraft.world.entity.boss.enderdragon.EnderDragon) return ((net.minecraft.server.level.ServerLevel)(entity.getCommandSenderWorld())).getChunkSource().chunkMap.serverViewDistance; // Paper - enderdragon is exempt
             return config.otherTrackingRange;
         }
     }