From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 13 May 2016 01:38:06 -0400
Subject: [PATCH] Entity Activation Range 2.0

Optimizes performance of Activation Range

Adds many new configurations and a new wake up inactive system

Fixes and adds new Immunities to improve gameplay behavior

Adds water Mobs to activation range config and nerfs fish
Adds flying monsters to control ghast and phantoms
Adds villagers as separate config

== AT ==
public net.minecraft.world.entity.Entity isInsidePortal
public net.minecraft.world.entity.LivingEntity jumping

diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index f85cbcd0ba398bdd2622a2e1aaba7de24d53038a..3b528a6adaa431ebdf11ce2ce8ea3c99f3b1dbe3 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -2,7 +2,6 @@ package net.minecraft.server.level;
 
 import com.google.common.annotations.VisibleForTesting;
 import co.aikar.timings.TimingHistory; // Paper
-import co.aikar.timings.Timings; // Paper
 import com.google.common.collect.Lists;
 import com.mojang.datafixers.DataFixer;
 import com.mojang.datafixers.util.Pair;
@@ -1047,17 +1046,17 @@ public class ServerLevel extends Level implements WorldGenLevel {
         ++TimingHistory.entityTicks; // Paper - timings
         // Spigot start
         co.aikar.timings.Timing timer; // Paper
-        if (!org.spigotmc.ActivationRange.checkIfActive(entity)) {
+        /*if (!org.spigotmc.ActivationRange.checkIfActive(entity)) { // Paper - comment out - EAR 2, reimplement below
             entity.tickCount++;
             timer = entity.getType().inactiveTickTimer.startTiming(); try { // Paper - timings
             entity.inactiveTick();
             } finally { timer.stopTiming(); } // Paper
             return;
-        }
+        }*/ // Paper - comment out EAR 2
         // Spigot end
         // Paper start- timings
-        TimingHistory.activatedEntityTicks++;
-        timer = entity.getVehicle() != null ? entity.getType().passengerTickTimer.startTiming() : entity.getType().tickTimer.startTiming();
+        final boolean isActive = org.spigotmc.ActivationRange.checkIfActive(entity);
+        timer = isActive ? entity.getType().tickTimer.startTiming() : entity.getType().inactiveTickTimer.startTiming(); // Paper
         try {
         // Paper end - timings
         entity.setOldPosAndRot();
@@ -1068,9 +1067,13 @@ public class ServerLevel extends Level implements WorldGenLevel {
             return BuiltInRegistries.ENTITY_TYPE.getKey(entity.getType()).toString();
         });
         gameprofilerfiller.incrementCounter("tickNonPassenger");
+        if (isActive) { // Paper - EAR 2
+            TimingHistory.activatedEntityTicks++;
         entity.tick();
         entity.postTick(); // CraftBukkit
+        } else { entity.inactiveTick(); } // Paper - EAR 2
         this.getProfiler().pop();
+        } finally { timer.stopTiming(); } // Paper - timings
         Iterator iterator = entity.getPassengers().iterator();
 
         while (iterator.hasNext()) {
@@ -1078,13 +1081,18 @@ public class ServerLevel extends Level implements WorldGenLevel {
 
             this.tickPassenger(entity, entity1);
         }
-        } finally { timer.stopTiming(); } // Paper - timings
+        // } finally { timer.stopTiming(); } // Paper - timings - move up
 
     }
 
     private void tickPassenger(Entity vehicle, Entity passenger) {
         if (!passenger.isRemoved() && passenger.getVehicle() == vehicle) {
             if (passenger instanceof Player || this.entityTickList.contains(passenger)) {
+                // Paper - EAR 2
+                final boolean isActive = org.spigotmc.ActivationRange.checkIfActive(passenger);
+                co.aikar.timings.Timing timer = isActive ? passenger.getType().passengerTickTimer.startTiming() : passenger.getType().passengerInactiveTickTimer.startTiming(); // Paper
+                try {
+                // Paper end
                 passenger.setOldPosAndRot();
                 ++passenger.tickCount;
                 ProfilerFiller gameprofilerfiller = this.getProfiler();
@@ -1093,8 +1101,17 @@ public class ServerLevel extends Level implements WorldGenLevel {
                     return BuiltInRegistries.ENTITY_TYPE.getKey(passenger.getType()).toString();
                 });
                 gameprofilerfiller.incrementCounter("tickPassenger");
+                // Paper start - EAR 2
+                if (isActive) {
                 passenger.rideTick();
                 passenger.postTick(); // CraftBukkit
+                } else {
+                    passenger.setDeltaMovement(Vec3.ZERO);
+                    passenger.inactiveTick();
+                    // copied from inside of if (isPassenger()) of passengerTick, but that ifPassenger is unnecessary
+                    vehicle.positionRider(passenger);
+                }
+                // Paper end - EAR 2
                 gameprofilerfiller.pop();
                 Iterator iterator = passenger.getPassengers().iterator();
 
@@ -1104,6 +1121,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
                     this.tickPassenger(passenger, entity2);
                 }
 
+            } finally { timer.stopTiming(); }// Paper - EAR2 timings
             }
         } else {
             passenger.stopRiding();
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 15625d54c32530eae73d6360ef68ffd1ddf752b0..35cfe934493a7425e415d58834d4016b4ea31e3b 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -384,6 +384,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
     public void inactiveTick() { }
     // Spigot end
     // Paper start
+    public long activatedImmunityTick = Integer.MIN_VALUE; // Paper
+    public boolean isTemporarilyActive = false; // Paper
     protected int numCollisions = 0; // Paper
     public boolean spawnedViaMobSpawner; // Paper - Yes this name is similar to above, upstream took the better one
     @javax.annotation.Nullable
@@ -909,6 +911,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
         } else {
             this.wasOnFire = this.isOnFire();
             if (movementType == MoverType.PISTON) {
+                this.activatedTick = Math.max(this.activatedTick, MinecraftServer.currentTick + 20); // Paper
+                this.activatedImmunityTick = Math.max(this.activatedImmunityTick, MinecraftServer.currentTick + 20);   // Paper
                 movement = this.limitPistonMovement(movement);
                 if (movement.equals(Vec3.ZERO)) {
                     return;
@@ -921,6 +925,13 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
                 this.stuckSpeedMultiplier = Vec3.ZERO;
                 this.setDeltaMovement(Vec3.ZERO);
             }
+            // Paper start - ignore movement changes while inactive.
+            if (isTemporarilyActive && !(this instanceof ItemEntity || this instanceof net.minecraft.world.entity.vehicle.AbstractMinecart) && movement == getDeltaMovement() && movementType == MoverType.SELF) {
+                setDeltaMovement(Vec3.ZERO);
+                this.level.getProfiler().pop();
+                return;
+            }
+            // Paper end
 
             movement = this.maybeBackOffFromEdge(movement, movementType);
             Vec3 vec3d1 = this.collide(movement);
diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
index f61a4409ebb5ed89e5a5cfe0488498a52faa2346..7caae84b23ba0803458b4497a116e0b8cee26a89 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -210,6 +210,19 @@ public abstract class Mob extends LivingEntity {
         return this.lookControl;
     }
 
+    // Paper start
+    @Override
+    public void inactiveTick() {
+        super.inactiveTick();
+        if (this.goalSelector.inactiveTick()) {
+            this.goalSelector.tick();
+        }
+        if (this.targetSelector.inactiveTick()) {
+            this.targetSelector.tick();
+        }
+    }
+    // Paper end
+
     public MoveControl getMoveControl() {
         if (this.isPassenger() && this.getVehicle() instanceof Mob) {
             Mob entityinsentient = (Mob) this.getVehicle();
diff --git a/src/main/java/net/minecraft/world/entity/PathfinderMob.java b/src/main/java/net/minecraft/world/entity/PathfinderMob.java
index 6ae3f5cd42dfd424fc3741957995f47ad5ec8941..bffec7fdf49994f702ea4c378237dac0983d0a19 100644
--- a/src/main/java/net/minecraft/world/entity/PathfinderMob.java
+++ b/src/main/java/net/minecraft/world/entity/PathfinderMob.java
@@ -19,6 +19,7 @@ public abstract class PathfinderMob extends Mob {
     }
 
     public org.bukkit.craftbukkit.entity.CraftCreature getBukkitCreature() { return (org.bukkit.craftbukkit.entity.CraftCreature) super.getBukkitEntity(); } // Paper
+    public BlockPos movingTarget = null; public BlockPos getMovingTarget() { return movingTarget; } // Paper
 
     public float getWalkTargetValue(BlockPos pos) {
         return this.getWalkTargetValue(pos, this.level);
diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/GoalSelector.java b/src/main/java/net/minecraft/world/entity/ai/goal/GoalSelector.java
index 07c1ca01c38d5d7d0a95ad5004b5df9f4a222935..e5995d0db5dcfba59a873ff439601894fdacd556 100644
--- a/src/main/java/net/minecraft/world/entity/ai/goal/GoalSelector.java
+++ b/src/main/java/net/minecraft/world/entity/ai/goal/GoalSelector.java
@@ -33,6 +33,7 @@ public class GoalSelector {
     private final EnumSet<Goal.Flag> disabledFlags = EnumSet.noneOf(Goal.Flag.class);
     private int tickCount;
     private int newGoalRate = 3;
+    private int curRate;
 
     public GoalSelector(Supplier<ProfilerFiller> profiler) {
         this.profiler = profiler;
@@ -49,6 +50,20 @@ public class GoalSelector {
         });
     }
 
+    // Paper start
+    public boolean inactiveTick() {
+        this.curRate++;
+        return this.curRate % this.newGoalRate == 0;
+    }
+    public boolean hasTasks() {
+        for (WrappedGoal task : this.availableGoals) {
+            if (task.isRunning()) {
+                return true;
+            }
+        }
+        return false;
+    }
+    // Paper end
     public void removeGoal(Goal goal) {
         this.availableGoals.stream().filter((wrappedGoal) -> {
             return wrappedGoal.getGoal() == goal;
diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/MoveToBlockGoal.java b/src/main/java/net/minecraft/world/entity/ai/goal/MoveToBlockGoal.java
index 6efba52c2e5d7811ee329ed22c1c76f75d7ddbe1..26bf383caea68834c654b25653ced9017f1b1b22 100644
--- a/src/main/java/net/minecraft/world/entity/ai/goal/MoveToBlockGoal.java
+++ b/src/main/java/net/minecraft/world/entity/ai/goal/MoveToBlockGoal.java
@@ -14,7 +14,7 @@ public abstract class MoveToBlockGoal extends Goal {
     protected int nextStartTick;
     protected int tryTicks;
     private int maxStayTicks;
-    protected BlockPos blockPos = BlockPos.ZERO; @Deprecated public final BlockPos getTargetPosition() { return this.blockPos; } // Paper - OBFHELPER
+    protected BlockPos blockPos = BlockPos.ZERO; @Deprecated public final BlockPos getTargetPosition() { return this.blockPos; } @Deprecated public void setTargetPosition(BlockPos pos) { this.blockPos = pos; mob.movingTarget = pos != BlockPos.ZERO ? pos : null; } // Paper - OBFHELPER
     private boolean reachedTarget;
     private final int searchRange;
     private final int verticalSearchRange;
@@ -23,6 +23,13 @@ public abstract class MoveToBlockGoal extends Goal {
     public MoveToBlockGoal(PathfinderMob mob, double speed, int range) {
         this(mob, speed, range, 1);
     }
+    // Paper start - activation range improvements
+    @Override
+    public void stop() {
+        super.stop();
+        setTargetPosition(BlockPos.ZERO);
+    }
+    // Paper end
 
     public MoveToBlockGoal(PathfinderMob mob, double speed, int range, int maxYDifference) {
         this.mob = mob;
@@ -114,6 +121,7 @@ public abstract class MoveToBlockGoal extends Goal {
                         mutableBlockPos.setWithOffset(blockPos, m, k - 1, n);
                         if (this.mob.isWithinRestriction(mutableBlockPos) && this.isValidTarget(this.mob.level, mutableBlockPos)) {
                             this.blockPos = mutableBlockPos;
+                            setTargetPosition(mutableBlockPos.immutable()); // Paper
                             return true;
                         }
                     }
diff --git a/src/main/java/net/minecraft/world/entity/npc/Villager.java b/src/main/java/net/minecraft/world/entity/npc/Villager.java
index bc778aadb2604756b783d4d024e3154576ab3236..214c7947705eda61454b70cbc4bf37bc54dd26e8 100644
--- a/src/main/java/net/minecraft/world/entity/npc/Villager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java
@@ -225,17 +225,29 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
     @Override
     public void inactiveTick() {
         // SPIGOT-3874, SPIGOT-3894, SPIGOT-3846, SPIGOT-5286 :(
-        if (level.spigotConfig.tickInactiveVillagers && this.isEffectiveAi()) {
-            this.customServerAiStep();
+        // Paper start
+        if (this.getUnhappyCounter() > 0) {
+            this.setUnhappyCounter(this.getUnhappyCounter() - 1);
+        }
+        if (this.isEffectiveAi()) {
+            if (level.spigotConfig.tickInactiveVillagers) {
+                this.customServerAiStep();
+            } else {
+                this.mobTick(true);
+            }
         }
+        maybeDecayGossip();
+        // Paper end
+
         super.inactiveTick();
     }
     // Spigot End
 
     @Override
-    protected void customServerAiStep() {
+    protected void customServerAiStep() { mobTick(false); }
+    protected void mobTick(boolean inactive) {
         this.level.getProfiler().push("villagerBrain");
-        this.getBrain().tick((ServerLevel) this.level, this);
+        if (!inactive) this.getBrain().tick((ServerLevel) this.level, this); // Paper
         this.level.getProfiler().pop();
         if (this.assignProfessionWhenSpawned) {
             this.assignProfessionWhenSpawned = false;
@@ -259,7 +271,7 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
             this.lastTradedPlayer = null;
         }
 
-        if (!this.isNoAi() && this.random.nextInt(100) == 0) {
+        if (!inactive && !this.isNoAi() && this.random.nextInt(100) == 0) { // Paper
             Raid raid = ((ServerLevel) this.level).getRaidAt(this.blockPosition());
 
             if (raid != null && raid.isActive() && !raid.isOver()) {
@@ -270,6 +282,7 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
         if (this.getVillagerData().getProfession() == VillagerProfession.NONE && this.isTrading()) {
             this.stopTrading();
         }
+        if (inactive) return; // Paper
 
         super.customServerAiStep();
     }
diff --git a/src/main/java/net/minecraft/world/entity/vehicle/MinecartHopper.java b/src/main/java/net/minecraft/world/entity/vehicle/MinecartHopper.java
index 3f8990d15bd6815db0ccb924e621dfcc3220e0e0..70f1916185b79bbb9f033f4ef8119d7b17a13ef8 100644
--- a/src/main/java/net/minecraft/world/entity/vehicle/MinecartHopper.java
+++ b/src/main/java/net/minecraft/world/entity/vehicle/MinecartHopper.java
@@ -57,6 +57,7 @@ public class MinecartHopper extends AbstractMinecartContainer implements Hopper
         if (bl != this.isEnabled()) {
             this.setEnabled(bl);
         }
+        this.immunize();  // Paper
 
     }
 
@@ -107,11 +108,13 @@ public class MinecartHopper extends AbstractMinecartContainer implements Hopper
 
     public boolean suckInItems() {
         if (HopperBlockEntity.suckInItems(this.level, this)) {
+            this.immunize();  // Paper
             return true;
         } else {
             List<ItemEntity> list = this.level.getEntitiesOfClass(ItemEntity.class, this.getBoundingBox().inflate(0.25D, 0.0D, 0.25D), EntitySelector.ENTITY_STILL_ALIVE);
             if (!list.isEmpty()) {
                 HopperBlockEntity.addItem(this, list.get(0));
+                this.immunize();  // Paper
             }
 
             return false;
@@ -149,4 +152,11 @@ public class MinecartHopper extends AbstractMinecartContainer implements Hopper
     public AbstractContainerMenu createMenu(int syncId, Inventory playerInventory) {
         return new HopperMenu(syncId, playerInventory, this);
     }
+
+    // Paper start
+    public void immunize() {
+        this.activatedImmunityTick = Math.max(this.activatedImmunityTick, net.minecraft.server.MinecraftServer.currentTick + 20);
+    }
+    // Paper end
+
 }
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index 9b3a86710d5ac63afee9293f0c2cb1e443c98020..6f5fa7a2db798419a60206bc714e72b49b6a79e8 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -157,6 +157,12 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
     public Map<BlockPos, BlockEntity> capturedTileEntities = new HashMap<>();
     public List<ItemEntity> captureDrops;
     public final it.unimi.dsi.fastutil.objects.Object2LongOpenHashMap<SpawnCategory> ticksPerSpawnCategory = new it.unimi.dsi.fastutil.objects.Object2LongOpenHashMap<>();
+    // Paper start
+    public int wakeupInactiveRemainingAnimals;
+    public int wakeupInactiveRemainingFlying;
+    public int wakeupInactiveRemainingMonsters;
+    public int wakeupInactiveRemainingVillagers;
+    // Paper end
     public boolean populating;
     public final org.spigotmc.SpigotWorldConfig spigotConfig; // Spigot
     // Paper start
diff --git a/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java b/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java
index 2f5f8e084c30bf654a19582e0b7baa9cde1b99b5..4f7b12d8f213d43f4ef5538b7e05809a1a106cbd 100644
--- a/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java
@@ -143,6 +143,10 @@ public class PistonMovingBlockEntity extends BlockEntity {
                                 }
 
                                 entity.setDeltaMovement(e, g, h);
+                                // Paper - EAR items stuck in in slime pushed by a piston
+                                entity.activatedTick = Math.max(entity.activatedTick, net.minecraft.server.MinecraftServer.currentTick + 10);
+                                entity.activatedImmunityTick = Math.max(entity.activatedImmunityTick, net.minecraft.server.MinecraftServer.currentTick + 10);
+                                // Paper end
                                 break;
                             }
                         }
diff --git a/src/main/java/org/spigotmc/ActivationRange.java b/src/main/java/org/spigotmc/ActivationRange.java
index 2861c585710eaa00541ff417a29f1f6a2fb5b46a..417296e8d2efb2b70809ff91b61451bd8e788df3 100644
--- a/src/main/java/org/spigotmc/ActivationRange.java
+++ b/src/main/java/org/spigotmc/ActivationRange.java
@@ -1,39 +1,52 @@
 package org.spigotmc;
 
+import net.minecraft.core.BlockPos;
 import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.level.ServerChunkCache;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.ExperienceOrb;
+import net.minecraft.world.entity.FlyingMob;
 import net.minecraft.world.entity.LightningBolt;
 import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.entity.Mob;
 import net.minecraft.world.entity.PathfinderMob;
+import net.minecraft.world.entity.ai.Brain;
 import net.minecraft.world.entity.ambient.AmbientCreature;
 import net.minecraft.world.entity.animal.Animal;
+import net.minecraft.world.entity.animal.Bee;
 import net.minecraft.world.entity.animal.Sheep;
+import net.minecraft.world.entity.animal.WaterAnimal;
+import net.minecraft.world.entity.animal.horse.Llama;
 import net.minecraft.world.entity.boss.EnderDragonPart;
 import net.minecraft.world.entity.boss.enderdragon.EndCrystal;
 import net.minecraft.world.entity.boss.enderdragon.EnderDragon;
 import net.minecraft.world.entity.boss.wither.WitherBoss;
 import net.minecraft.world.entity.item.PrimedTnt;
 import net.minecraft.world.entity.monster.Creeper;
-import net.minecraft.world.entity.monster.Monster;
-import net.minecraft.world.entity.monster.Slime;
+import net.minecraft.world.entity.monster.Enemy;
+import net.minecraft.world.entity.monster.Pillager;
 import net.minecraft.world.entity.npc.Villager;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.entity.projectile.AbstractArrow;
 import net.minecraft.world.entity.projectile.AbstractHurtingProjectile;
+import net.minecraft.world.entity.projectile.EyeOfEnder;
 import net.minecraft.world.entity.projectile.FireworkRocketEntity;
 import net.minecraft.world.entity.projectile.ThrowableProjectile;
 import net.minecraft.world.entity.projectile.ThrownTrident;
 import net.minecraft.world.entity.raid.Raider;
+import co.aikar.timings.MinecraftTimings;
+import net.minecraft.world.entity.schedule.Activity;
 import net.minecraft.world.level.Level;
 import net.minecraft.world.phys.AABB;
-import co.aikar.timings.MinecraftTimings;
 
 public class ActivationRange
 {
 
     public enum ActivationType
     {
+        WATER, // Paper
+        FLYING_MONSTER, // Paper
+        VILLAGER, // Paper
         MONSTER,
         ANIMAL,
         RAIDER,
@@ -41,6 +54,43 @@ public class ActivationRange
 
         AABB boundingBox = new AABB( 0, 0, 0, 0, 0, 0 );
     }
+    // Paper start
+
+    static Activity[] VILLAGER_PANIC_IMMUNITIES = {
+        Activity.HIDE,
+        Activity.PRE_RAID,
+        Activity.RAID,
+        Activity.PANIC
+    };
+
+    private static int checkInactiveWakeup(Entity entity) {
+        Level world = entity.level;
+        SpigotWorldConfig config = world.spigotConfig;
+        long inactiveFor = MinecraftServer.currentTick - entity.activatedTick;
+        if (entity.activationType == ActivationType.VILLAGER) {
+            if (inactiveFor > config.wakeUpInactiveVillagersEvery && world.wakeupInactiveRemainingVillagers > 0) {
+                world.wakeupInactiveRemainingVillagers--;
+                return config.wakeUpInactiveVillagersFor;
+            }
+        } else if (entity.activationType == ActivationType.ANIMAL) {
+            if (inactiveFor > config.wakeUpInactiveAnimalsEvery && world.wakeupInactiveRemainingAnimals > 0) {
+                world.wakeupInactiveRemainingAnimals--;
+                return config.wakeUpInactiveAnimalsFor;
+            }
+        } else if (entity.activationType == ActivationType.FLYING_MONSTER) {
+            if (inactiveFor > config.wakeUpInactiveFlyingEvery && world.wakeupInactiveRemainingFlying > 0) {
+                world.wakeupInactiveRemainingFlying--;
+                return config.wakeUpInactiveFlyingFor;
+            }
+        } else if (entity.activationType == ActivationType.MONSTER || entity.activationType == ActivationType.RAIDER) {
+            if (inactiveFor > config.wakeUpInactiveMonstersEvery && world.wakeupInactiveRemainingMonsters > 0) {
+                world.wakeupInactiveRemainingMonsters--;
+                return config.wakeUpInactiveMonstersFor;
+            }
+        }
+        return -1;
+    }
+    // Paper end
 
     static AABB maxBB = new AABB( 0, 0, 0, 0, 0, 0 );
 
@@ -53,10 +103,13 @@ public class ActivationRange
      */
     public static ActivationType initializeEntityActivationType(Entity entity)
     {
+        if (entity instanceof WaterAnimal) { return ActivationType.WATER; } // Paper
+        else if (entity instanceof Villager) { return ActivationType.VILLAGER; } // Paper
+        else if (entity instanceof FlyingMob && entity instanceof Enemy) { return ActivationType.FLYING_MONSTER; } // Paper - doing & Monster incase Flying no longer includes monster in future
         if ( entity instanceof Raider )
         {
             return ActivationType.RAIDER;
-        } else if ( entity instanceof Monster || entity instanceof Slime )
+        } else if ( entity instanceof Enemy ) // Paper - correct monster check
         {
             return ActivationType.MONSTER;
         } else if ( entity instanceof PathfinderMob || entity instanceof AmbientCreature )
@@ -77,10 +130,14 @@ public class ActivationRange
      */
     public static boolean initializeEntityActivationState(Entity entity, SpigotWorldConfig config)
     {
-        if ( ( entity.activationType == ActivationType.MISC && config.miscActivationRange == 0 )
-                || ( entity.activationType == ActivationType.RAIDER && config.raiderActivationRange == 0 )
-                || ( entity.activationType == ActivationType.ANIMAL && config.animalActivationRange == 0 )
-                || ( entity.activationType == ActivationType.MONSTER && config.monsterActivationRange == 0 )
+        if ( ( entity.activationType == ActivationType.MISC && config.miscActivationRange <= 0 )
+                || ( entity.activationType == ActivationType.RAIDER && config.raiderActivationRange <= 0 )
+                || ( entity.activationType == ActivationType.ANIMAL && config.animalActivationRange <= 0 )
+                || ( entity.activationType == ActivationType.MONSTER && config.monsterActivationRange <= 0 )
+                || ( entity.activationType == ActivationType.VILLAGER && config.villagerActivationRange <= 0 ) // Paper
+                || ( entity.activationType == ActivationType.WATER && config.waterActivationRange <= 0 ) // Paper
+                || ( entity.activationType == ActivationType.FLYING_MONSTER && config.flyingMonsterActivationRange <= 0 ) // Paper
+                || entity instanceof EyeOfEnder // Paper
                 || entity instanceof Player
                 || entity instanceof ThrowableProjectile
                 || entity instanceof EnderDragon
@@ -113,10 +170,25 @@ public class ActivationRange
         final int raiderActivationRange = world.spigotConfig.raiderActivationRange;
         final int animalActivationRange = world.spigotConfig.animalActivationRange;
         final int monsterActivationRange = world.spigotConfig.monsterActivationRange;
+        // Paper start
+        final int waterActivationRange = world.spigotConfig.waterActivationRange;
+        final int flyingActivationRange = world.spigotConfig.flyingMonsterActivationRange;
+        final int villagerActivationRange = world.spigotConfig.villagerActivationRange;
+        world.wakeupInactiveRemainingAnimals = Math.min(world.wakeupInactiveRemainingAnimals + 1, world.spigotConfig.wakeUpInactiveAnimals);
+        world.wakeupInactiveRemainingVillagers = Math.min(world.wakeupInactiveRemainingVillagers + 1, world.spigotConfig.wakeUpInactiveVillagers);
+        world.wakeupInactiveRemainingMonsters = Math.min(world.wakeupInactiveRemainingMonsters + 1, world.spigotConfig.wakeUpInactiveMonsters);
+        world.wakeupInactiveRemainingFlying = Math.min(world.wakeupInactiveRemainingFlying + 1, world.spigotConfig.wakeUpInactiveFlying);
+        final ServerChunkCache chunkProvider = (ServerChunkCache) world.getChunkSource();
+        // Paper end
 
         int maxRange = Math.max( monsterActivationRange, animalActivationRange );
         maxRange = Math.max( maxRange, raiderActivationRange );
         maxRange = Math.max( maxRange, miscActivationRange );
+        // Paper start
+        maxRange = Math.max( maxRange, flyingActivationRange );
+        maxRange = Math.max( maxRange, waterActivationRange );
+        maxRange = Math.max( maxRange, villagerActivationRange );
+        // Paper end
         maxRange = Math.min( ( world.spigotConfig.simulationDistance << 4 ) - 8, maxRange );
 
         for ( Player player : world.players() )
@@ -127,11 +199,17 @@ public class ActivationRange
                 continue;
             }
 
-            ActivationRange.maxBB = player.getBoundingBox().inflate( maxRange, 256, maxRange );
-            ActivationType.MISC.boundingBox = player.getBoundingBox().inflate( miscActivationRange, 256, miscActivationRange );
-            ActivationType.RAIDER.boundingBox = player.getBoundingBox().inflate( raiderActivationRange, 256, raiderActivationRange );
-            ActivationType.ANIMAL.boundingBox = player.getBoundingBox().inflate( animalActivationRange, 256, animalActivationRange );
-            ActivationType.MONSTER.boundingBox = player.getBoundingBox().inflate( monsterActivationRange, 256, monsterActivationRange );
+            // Paper start
+            int worldHeight = world.getHeight();
+            ActivationRange.maxBB = player.getBoundingBox().inflate( maxRange, worldHeight, maxRange );
+            ActivationType.MISC.boundingBox = player.getBoundingBox().inflate( miscActivationRange, worldHeight, miscActivationRange );
+            ActivationType.RAIDER.boundingBox = player.getBoundingBox().inflate( raiderActivationRange, worldHeight, raiderActivationRange );
+            ActivationType.ANIMAL.boundingBox = player.getBoundingBox().inflate( animalActivationRange, worldHeight, animalActivationRange );
+            ActivationType.MONSTER.boundingBox = player.getBoundingBox().inflate( monsterActivationRange, worldHeight, monsterActivationRange );
+            ActivationType.WATER.boundingBox = player.getBoundingBox().inflate( waterActivationRange, worldHeight, waterActivationRange );
+            ActivationType.FLYING_MONSTER.boundingBox = player.getBoundingBox().inflate( flyingActivationRange, worldHeight, flyingActivationRange );
+            ActivationType.VILLAGER.boundingBox = player.getBoundingBox().inflate( villagerActivationRange, worldHeight, villagerActivationRange );
+            // Paper end
 
             // Paper start
             java.util.List<Entity> entities = world.getEntities((Entity)null, maxBB, null);
@@ -172,60 +250,118 @@ public class ActivationRange
      * @param entity
      * @return
      */
-    public static boolean checkEntityImmunities(Entity entity)
+    public static int checkEntityImmunities(Entity entity) // Paper - return # of ticks to get immunity
     {
+        // Paper start
+        SpigotWorldConfig config = entity.level.spigotConfig;
+        int inactiveWakeUpImmunity = checkInactiveWakeup(entity);
+        if (inactiveWakeUpImmunity > -1) {
+            return inactiveWakeUpImmunity;
+        }
+        if (entity.remainingFireTicks > 0) {
+            return 2;
+        }
+        if (entity.activatedImmunityTick >= MinecraftServer.currentTick) {
+            return 1;
+        }
+        long inactiveFor = MinecraftServer.currentTick - entity.activatedTick;
+        // Paper end
         // quick checks.
-        if ( entity.wasTouchingWater || entity.remainingFireTicks > 0 )
+        if ( (entity.activationType != ActivationType.WATER && entity.wasTouchingWater && entity.isPushedByFluid()) ) // Paper
         {
-            return true;
+            return 100; // Paper
+        }
+        // Paper start
+        if ( !entity.isOnGround() || entity.getDeltaMovement().horizontalDistanceSqr() > 9.999999747378752E-6D )
+        {
+            return 100;
         }
+        // Paper end
         if ( !( entity instanceof AbstractArrow ) )
         {
-            if ( !entity.isOnGround() || !entity.passengers.isEmpty() || entity.isPassenger() )
+            if ( (!entity.isOnGround() && !(entity instanceof FlyingMob)) ) // Paper - remove passengers logic
             {
-                return true;
+                return 10; // Paper
             }
         } else if ( !( (AbstractArrow) entity ).inGround )
         {
-            return true;
+            return 1; // Paper
         }
         // special cases.
         if ( entity instanceof LivingEntity )
         {
             LivingEntity living = (LivingEntity) entity;
-            if ( /*TODO: Missed mapping? living.attackTicks > 0 || */ living.hurtTime > 0 || living.activeEffects.size() > 0 )
+            if ( living.onClimbable() || living.jumping || living.hurtTime > 0 || living.activeEffects.size() > 0 ) // Paper
             {
-                return true;
+                return 1; // Paper
             }
-            if ( entity instanceof PathfinderMob && ( (PathfinderMob) entity ).getTarget() != null )
+            if ( entity instanceof Mob && ((Mob) entity ).getTarget() != null) // Paper
             {
-                return true;
+                return 20; // Paper
+            }
+            // Paper start
+            if (entity instanceof Bee) {
+                Bee bee = (Bee)entity;
+                BlockPos movingTarget = bee.getMovingTarget();
+                if (bee.isAngry() ||
+                    (bee.getHivePos() != null && bee.getHivePos().equals(movingTarget)) ||
+                    (bee.getSavedFlowerPos() != null && bee.getSavedFlowerPos().equals(movingTarget))
+                ) {
+                    return 20;
+                }
+            }
+            if ( entity instanceof Villager ) {
+                Brain<Villager> behaviorController = ((Villager) entity).getBrain();
+
+                if (config.villagersActiveForPanic) {
+                    for (Activity activity : VILLAGER_PANIC_IMMUNITIES) {
+                        if (behaviorController.isActive(activity)) {
+                            return 20*5;
+                        }
+                    }
+                }
+
+                if (config.villagersWorkImmunityAfter > 0 && inactiveFor >= config.villagersWorkImmunityAfter) {
+                    if (behaviorController.isActive(Activity.WORK)) {
+                        return config.villagersWorkImmunityFor;
+                    }
+                }
             }
-            if ( entity instanceof Villager && ( (Villager) entity ).canBreed() )
+            if ( entity instanceof Llama && ( (Llama) entity ).inCaravan() )
             {
-                return true;
+                return 1;
             }
+            // Paper end
             if ( entity instanceof Animal )
             {
                 Animal animal = (Animal) entity;
                 if ( animal.isBaby() || animal.isInLove() )
                 {
-                    return true;
+                    return 5; // Paper
                 }
                 if ( entity instanceof Sheep && ( (Sheep) entity ).isSheared() )
                 {
-                    return true;
+                    return 1; // Paper
                 }
             }
             if (entity instanceof Creeper && ((Creeper) entity).isIgnited()) { // isExplosive
-                return true;
+                return 20; // Paper
+            }
+            // Paper start
+            if (entity instanceof Mob && ((Mob) entity).targetSelector.hasTasks() ) {
+                return 0;
             }
+            if (entity instanceof Pillager) {
+                Pillager pillager = (Pillager) entity;
+                // TODO:?
+            }
+            // Paper end
         }
         // SPIGOT-6644: Otherwise the target refresh tick will be missed
         if (entity instanceof ExperienceOrb) {
-            return true;
+            return 20; // Paper
         }
-        return false;
+        return -1; // Paper
     }
 
     /**
@@ -240,8 +376,19 @@ public class ActivationRange
         if ( entity instanceof FireworkRocketEntity ) {
             return true;
         }
+        // Paper start - special case always immunities
+        // immunize brand new entities, dead entities, and portal scenarios
+        if (entity.defaultActivationState || entity.tickCount < 20*10 || !entity.isAlive() || entity.isInsidePortal || entity.portalCooldown > 0) {
+            return true;
+        }
+        // immunize leashed entities
+        if (entity instanceof Mob && ((Mob)entity).getLeashHolder() instanceof Player) {
+            return true;
+        }
+        // Paper end
 
-        boolean isActive = entity.activatedTick >= MinecraftServer.currentTick || entity.defaultActivationState;
+        boolean isActive = entity.activatedTick >= MinecraftServer.currentTick;
+        entity.isTemporarilyActive = false; // Paper
 
         // Should this entity tick?
         if ( !isActive )
@@ -249,15 +396,19 @@ public class ActivationRange
             if ( ( MinecraftServer.currentTick - entity.activatedTick - 1 ) % 20 == 0 )
             {
                 // Check immunities every 20 ticks.
-                if ( ActivationRange.checkEntityImmunities( entity ) )
-                {
-                    // Triggered some sort of immunity, give 20 full ticks before we check again.
-                    entity.activatedTick = MinecraftServer.currentTick + 20;
+                // Paper start
+                int immunity = checkEntityImmunities(entity);
+                if (immunity >= 0) {
+                    entity.activatedTick = MinecraftServer.currentTick + immunity;
+                } else {
+                    entity.isTemporarilyActive = true;
                 }
+                // Paper end
                 isActive = true;
+
             }
             // Add a little performance juice to active entities. Skip 1/4 if not immune.
-        } else if ( !entity.defaultActivationState && entity.tickCount + entity.getId() + 1 % 4 == 0 && !ActivationRange.checkEntityImmunities( entity ) ) // Paper - Ensure checking item movement is offset from Spigot's entity activation range check
+        } else if ( entity.tickCount + entity.getId() + 1 % 4 == 0 && ActivationRange.checkEntityImmunities( entity ) < 0 ) // Paper
         {
             isActive = false;
         }
diff --git a/src/main/java/org/spigotmc/SpigotWorldConfig.java b/src/main/java/org/spigotmc/SpigotWorldConfig.java
index 70b3ff4a6a9aea24e28d99997a936e850d46b05e..a345befaee2e4703294c3941f4060c496838c496 100644
--- a/src/main/java/org/spigotmc/SpigotWorldConfig.java
+++ b/src/main/java/org/spigotmc/SpigotWorldConfig.java
@@ -205,14 +205,60 @@ public class SpigotWorldConfig
     public int monsterActivationRange = 32;
     public int raiderActivationRange = 48;
     public int miscActivationRange = 16;
+    // Paper start
+    public int flyingMonsterActivationRange = 32;
+    public int waterActivationRange = 16;
+    public int villagerActivationRange = 32;
+    public int wakeUpInactiveAnimals = 4;
+    public int wakeUpInactiveAnimalsEvery = 60*20;
+    public int wakeUpInactiveAnimalsFor = 5*20;
+    public int wakeUpInactiveMonsters = 8;
+    public int wakeUpInactiveMonstersEvery = 20*20;
+    public int wakeUpInactiveMonstersFor = 5*20;
+    public int wakeUpInactiveVillagers = 4;
+    public int wakeUpInactiveVillagersEvery = 30*20;
+    public int wakeUpInactiveVillagersFor = 5*20;
+    public int wakeUpInactiveFlying = 8;
+    public int wakeUpInactiveFlyingEvery = 10*20;
+    public int wakeUpInactiveFlyingFor = 5*20;
+    public int villagersWorkImmunityAfter = 5*20;
+    public int villagersWorkImmunityFor = 20;
+    public boolean villagersActiveForPanic = true;
+    // Paper end
     public boolean tickInactiveVillagers = true;
     public boolean ignoreSpectatorActivation = false;
     private void activationRange()
     {
+        boolean hasAnimalsConfig = config.getInt("entity-activation-range.animals", this.animalActivationRange) != this.animalActivationRange; // Paper
         this.animalActivationRange = this.getInt( "entity-activation-range.animals", this.animalActivationRange );
         this.monsterActivationRange = this.getInt( "entity-activation-range.monsters", this.monsterActivationRange );
         this.raiderActivationRange = this.getInt( "entity-activation-range.raiders", this.raiderActivationRange );
         this.miscActivationRange = this.getInt( "entity-activation-range.misc", this.miscActivationRange );
+        // Paper start
+        this.waterActivationRange = this.getInt( "entity-activation-range.water", this.waterActivationRange );
+        this.villagerActivationRange = this.getInt( "entity-activation-range.villagers", hasAnimalsConfig ? this.animalActivationRange : this.villagerActivationRange );
+        this.flyingMonsterActivationRange = this.getInt( "entity-activation-range.flying-monsters", this.flyingMonsterActivationRange );
+
+        this.wakeUpInactiveAnimals = this.getInt("entity-activation-range.wake-up-inactive.animals-max-per-tick", this.wakeUpInactiveAnimals);
+        this.wakeUpInactiveAnimalsEvery = this.getInt("entity-activation-range.wake-up-inactive.animals-every", this.wakeUpInactiveAnimalsEvery);
+        this.wakeUpInactiveAnimalsFor = this.getInt("entity-activation-range.wake-up-inactive.animals-for", this.wakeUpInactiveAnimalsFor);
+
+        this.wakeUpInactiveMonsters = this.getInt("entity-activation-range.wake-up-inactive.monsters-max-per-tick", this.wakeUpInactiveMonsters);
+        this.wakeUpInactiveMonstersEvery = this.getInt("entity-activation-range.wake-up-inactive.monsters-every", this.wakeUpInactiveMonstersEvery);
+        this.wakeUpInactiveMonstersFor = this.getInt("entity-activation-range.wake-up-inactive.monsters-for", this.wakeUpInactiveMonstersFor);
+
+        this.wakeUpInactiveVillagers = this.getInt("entity-activation-range.wake-up-inactive.villagers-max-per-tick", this.wakeUpInactiveVillagers);
+        this.wakeUpInactiveVillagersEvery = this.getInt("entity-activation-range.wake-up-inactive.villagers-every", this.wakeUpInactiveVillagersEvery);
+        this.wakeUpInactiveVillagersFor = this.getInt("entity-activation-range.wake-up-inactive.villagers-for", this.wakeUpInactiveVillagersFor);
+
+        this.wakeUpInactiveFlying = this.getInt("entity-activation-range.wake-up-inactive.flying-monsters-max-per-tick", this.wakeUpInactiveFlying);
+        this.wakeUpInactiveFlyingEvery = this.getInt("entity-activation-range.wake-up-inactive.flying-monsters-every", this.wakeUpInactiveFlyingEvery);
+        this.wakeUpInactiveFlyingFor = this.getInt("entity-activation-range.wake-up-inactive.flying-monsters-for", this.wakeUpInactiveFlyingFor);
+
+        this.villagersWorkImmunityAfter = this.getInt( "entity-activation-range.villagers-work-immunity-after", this.villagersWorkImmunityAfter );
+        this.villagersWorkImmunityFor = this.getInt( "entity-activation-range.villagers-work-immunity-for", this.villagersWorkImmunityFor );
+        this.villagersActiveForPanic = this.getBoolean( "entity-activation-range.villagers-active-for-panic", this.villagersActiveForPanic );
+        // Paper end
         this.tickInactiveVillagers = this.getBoolean( "entity-activation-range.tick-inactive-villagers", this.tickInactiveVillagers );
         this.ignoreSpectatorActivation = this.getBoolean( "entity-activation-range.ignore-spectators", this.ignoreSpectatorActivation );
         this.log( "Entity Activation Range: An " + this.animalActivationRange + " / Mo " + this.monsterActivationRange + " / Ra " + this.raiderActivationRange + " / Mi " + this.miscActivationRange + " / Tiv " + this.tickInactiveVillagers + " / Isa " + this.ignoreSpectatorActivation );
