From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Suddenly <suddenly@suddenly.coffee>
Date: Tue, 1 Mar 2016 13:51:54 -0600
Subject: [PATCH] Add configurable despawn distances for living entities


diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index d2ac0123812224181afae8fca96058ddc8cdff1e..3afadc8d916714398974d77aa0f1093729e008ca 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -3,6 +3,9 @@ package com.destroystokyo.paper;
 import java.util.List;
 
 import java.util.stream.Collectors;
+import it.unimi.dsi.fastutil.objects.Reference2IntMap;
+import it.unimi.dsi.fastutil.objects.Reference2IntOpenHashMap;
+import net.minecraft.world.entity.MobCategory;
 import org.bukkit.Bukkit;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.spigotmc.SpigotWorldConfig;
@@ -46,6 +49,13 @@ public class PaperWorldConfig {
     public void removeOldValues() {
         boolean needsSave = false;
 
+        if (PaperConfig.version < 24) {
+            needsSave = true;
+
+            set("despawn-ranges.soft", null);
+            set("despawn-ranges.hard", null);
+        }
+
         if (needsSave) {
             saveConfig();
         }
@@ -137,4 +147,31 @@ public class PaperWorldConfig {
     private void nerfedMobsShouldJump() {
         nerfedMobsShouldJump = getBoolean("spawner-nerfed-mobs-should-jump", false);
     }
+
+    public final Reference2IntMap<MobCategory> softDespawnDistances = new Reference2IntOpenHashMap<>(MobCategory.values().length);
+    public final Reference2IntMap<MobCategory> hardDespawnDistances = new Reference2IntOpenHashMap<>(MobCategory.values().length);
+    private void despawnDistances() {
+        if (PaperConfig.version < 24) {
+            int softDistance = getInt("despawn-ranges.soft", 32, false); // 32^2 = 1024, Minecraft Default
+            int hardDistance = getInt("despawn-ranges.hard", 128, false); // 128^2 = 16384, Minecraft Default
+            for (MobCategory value : MobCategory.values()) {
+                if (softDistance != 32) {
+                    softDespawnDistances.put(value, softDistance);
+                }
+                if (hardDistance != 128) {
+                    hardDespawnDistances.put(value, hardDistance);
+                }
+            }
+        }
+        for (MobCategory category : MobCategory.values()) {
+            int softDistance = getInt("despawn-ranges." + category.getName() + ".soft", softDespawnDistances.getOrDefault(category, category.getNoDespawnDistance()));
+            int hardDistance = getInt("despawn-ranges." + category.getName() + ".hard", hardDespawnDistances.getOrDefault(category, category.getDespawnDistance()));
+            if (softDistance > hardDistance) {
+                softDistance = hardDistance;
+            }
+            log("Mobs in " + category.getName() + " Despawn Ranges: Soft" + softDistance + " Hard: " + hardDistance);
+            softDespawnDistances.put(category, softDistance);
+            hardDespawnDistances.put(category, hardDistance);
+        }
+    }
 }
diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
index 4f58fae1b3738e7e0507a46df275a258c94fcec4..88b021b7d1b71bd3fa64b54ca0fd52fef93ea9f0 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -788,14 +788,14 @@ public abstract class Mob extends LivingEntity {
 
             if (entityhuman != null) {
                 double d0 = entityhuman.distanceToSqr((Entity) this);
-                int i = this.getType().getCategory().getDespawnDistance();
+                int i = this.level.paperConfig.hardDespawnDistances.getInt(this.getType().getCategory()); // Paper - custom despawn distances
                 int j = i * i;
 
                 if (d0 > (double) j && this.removeWhenFarAway(d0)) {
                     this.discard();
                 }
 
-                int k = this.getType().getCategory().getNoDespawnDistance();
+                int k = this.level.paperConfig.softDespawnDistances.getInt(this.getType().getCategory()); // Paper - custom despawn distances
                 int l = k * k;
 
                 if (this.noActionTime > 600 && this.random.nextInt(800) == 0 && d0 > (double) l && this.removeWhenFarAway(d0)) {