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

diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 9b883af58fd87751bdad909a015cb78ca5647e90..12162ff2dc7c82f50f1d892bc807985ebcd44333 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;
@@ -969,17 +968,17 @@ 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();
@@ -990,9 +989,13 @@ public class ServerLevel extends Level implements WorldGenLevel {
             return Registry.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()) {
@@ -1000,13 +1003,18 @@ 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();
@@ -1015,8 +1023,17 @@ public class ServerLevel extends Level implements WorldGenLevel {
                     return Registry.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();
 
@@ -1026,6 +1043,7 @@ 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 bf34137b09ed8ba9d7dc3f5e10c0ed73efebf3d7..44fb916fafdc4eb9c4c7971b9c53f7f3bc00b431 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -322,6 +322,8 @@ 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
@@ -794,6 +796,8 @@ 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;
@@ -806,6 +810,13 @@ 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 bcf7c431f90a917d56933370e9f479f25f009dcb..7b671d833cf717c16761b878d45cf04b79c7dbd1 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -206,6 +206,19 @@ 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 ff458abb221daaddaa734811eaaa35ea43883343..d1ab31d03ae421e628448fe2492ff138dc57c00f 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 d1a68808af3c9c35767e4be72ce1ed0f77f7a3c9..ef8fe11bcda9fb8365d2c7efb2e088727dd849d9 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;
@@ -47,6 +48,20 @@ public class GoalSelector {
         this.availableGoals.clear();
     }
 
+    // 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 ecd7083b40ce6230d49ea4487766a6f06b4e96d0..f7b8804394ad55e3f6c7c8c3a8f0fe7894385c90 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/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index dab1b7491fff4da9f606d041536adb649bfccd9a..27bd21ec70a446537d24952cb7ea04b0c2f4ef86 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -152,6 +152,12 @@ 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
 
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 6b29f66aec8a82b367a979b5b04857416b697c14..78d252b829e5c1f19532656a728620852403760c 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
@@ -140,6 +140,10 @@ 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 7bae24598218dcf0012dd21e619e6f5f984bd6f0..c9a032c5331a918453de5e8c6a6d13f5c9f415ee 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() )
@@ -132,6 +204,11 @@ public class ActivationRange
             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
+            ActivationType.WATER.boundingBox = player.getBoundingBox().inflate( waterActivationRange, 256, waterActivationRange );
+            ActivationType.FLYING_MONSTER.boundingBox = player.getBoundingBox().inflate( flyingActivationRange, 256, flyingActivationRange );
+            ActivationType.VILLAGER.boundingBox = player.getBoundingBox().inflate( villagerActivationRange, 256, villagerActivationRange );
+            // Paper end
 
             world.getEntities().get(maxBB, ActivationRange::activateEntity);
         }
@@ -166,60 +243,118 @@ 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
             }
-            if ( entity instanceof Villager && ( (Villager) entity ).canBreed() )
+            // 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 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
     }
 
     /**
@@ -234,8 +369,19 @@ 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).leashHolder 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 )
@@ -243,15 +389,19 @@ 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 c55321ec37b500199eda375cabca21e666612b9c..d4f035aca1d63596fd52b21e34c69e8d08e24e7a 100644
--- a/src/main/java/org/spigotmc/SpigotWorldConfig.java
+++ b/src/main/java/org/spigotmc/SpigotWorldConfig.java
@@ -199,14 +199,60 @@ 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 );
