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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jedediah Smith <jedediah@silencegreys.com>
Date: Tue, 1 Mar 2016 14:47:52 -0600
Subject: [PATCH] Player affects spawning API


diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index d7dfb89faa47817c51257bb124cfb3806c5e27da..ca620977666f4d4173089876f506f041ab278bd3 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -1354,6 +1354,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, ne
         return MathHelper.c(f * f + f1 * f1 + f2 * f2);
     }
 
+    public double getDistanceSquared(double x, double y, double z) { return h(x, y, z); } // Paper - OBFHELPER
     public double h(double d0, double d1, double d2) {
         double d3 = this.locX() - d0;
         double d4 = this.locY() - d1;
diff --git a/src/main/java/net/minecraft/world/entity/EntityInsentient.java b/src/main/java/net/minecraft/world/entity/EntityInsentient.java
index f93af56f68d5fd27eca38d333ca429ce22fc397b..0631cd531647239858b2a7298f58cc770720f69a 100644
--- a/src/main/java/net/minecraft/world/entity/EntityInsentient.java
+++ b/src/main/java/net/minecraft/world/entity/EntityInsentient.java
@@ -756,7 +756,7 @@ public abstract class EntityInsentient extends EntityLiving {
         if (this.world.getDifficulty() == EnumDifficulty.PEACEFUL && this.L()) {
             this.die();
         } else if (!this.isPersistent() && !this.isSpecialPersistence()) {
-            EntityHuman entityhuman = this.world.findNearbyPlayer(this, -1.0D);
+            EntityHuman entityhuman = this.world.findNearbyPlayer(this, -1.0D, IEntitySelector.affectsSpawning); // Paper
 
             if (entityhuman != null) {
                 double d0 = entityhuman.h((Entity) this); // CraftBukkit - decompile error
diff --git a/src/main/java/net/minecraft/world/entity/IEntitySelector.java b/src/main/java/net/minecraft/world/entity/IEntitySelector.java
index 6e78192a5898df017d96acba845a288011d24e35..dfcfdb31ca9531913d705aaaf85fb67399cfdc8c 100644
--- a/src/main/java/net/minecraft/world/entity/IEntitySelector.java
+++ b/src/main/java/net/minecraft/world/entity/IEntitySelector.java
@@ -29,6 +29,12 @@ public final class IEntitySelector {
         return !entity.isSpectator();
     };
 
+    // Paper start
+    public static final Predicate<Entity> affectsSpawning = (entity) -> {
+        return !entity.isSpectator() && entity.isAlive() && (entity instanceof EntityPlayer) && ((EntityPlayer) entity).affectsSpawning;
+    };
+    // Paper end
+
     public static Predicate<Entity> a(double d0, double d1, double d2, double d3) {
         double d4 = d3 * d3;
 
diff --git a/src/main/java/net/minecraft/world/entity/monster/EntitySilverfish.java b/src/main/java/net/minecraft/world/entity/monster/EntitySilverfish.java
index 0b3b430766fba602e74727f78173567ca10fabc6..e1fcb1be102822e87eaf7757fbd64a516b2f58ac 100644
--- a/src/main/java/net/minecraft/world/entity/monster/EntitySilverfish.java
+++ b/src/main/java/net/minecraft/world/entity/monster/EntitySilverfish.java
@@ -122,7 +122,7 @@ public class EntitySilverfish extends EntityMonster {
         if (c(entitytypes, generatoraccess, enummobspawn, blockposition, random)) {
             EntityHuman entityhuman = generatoraccess.a((double) blockposition.getX() + 0.5D, (double) blockposition.getY() + 0.5D, (double) blockposition.getZ() + 0.5D, 5.0D, true);
 
-            return entityhuman == null;
+            return !(entityhuman != null && !entityhuman.affectsSpawning) && entityhuman == null; // Paper - Affects Spawning API
         } else {
             return false;
         }
diff --git a/src/main/java/net/minecraft/world/entity/player/EntityHuman.java b/src/main/java/net/minecraft/world/entity/player/EntityHuman.java
index 1017ee73b8617ce2b6734469fa49aaff7563c2b1..f42e16589476c1bd10b13214dda5ac7bb3e52131 100644
--- a/src/main/java/net/minecraft/world/entity/player/EntityHuman.java
+++ b/src/main/java/net/minecraft/world/entity/player/EntityHuman.java
@@ -164,6 +164,9 @@ public abstract class EntityHuman extends EntityLiving {
     private final ItemCooldown bM;
     @Nullable
     public EntityFishingHook hookedFish;
+    // Paper start
+    public boolean affectsSpawning = true;
+    // Paper end
 
     // CraftBukkit start
     public boolean fauxSleeping;
diff --git a/src/main/java/net/minecraft/world/level/IEntityAccess.java b/src/main/java/net/minecraft/world/level/IEntityAccess.java
index 4ece69851e7b05016f52c291ce911eb791cf3a23..6d5d4c3df65995b9a13b66d070ba08d553cc98a2 100644
--- a/src/main/java/net/minecraft/world/level/IEntityAccess.java
+++ b/src/main/java/net/minecraft/world/level/IEntityAccess.java
@@ -92,8 +92,9 @@ public interface IEntityAccess {
         }
     }
 
-    @Nullable
-    default EntityHuman a(double d0, double d1, double d2, double d3, @Nullable Predicate<Entity> predicate) {
+    default EntityHuman findNearbyPlayer(Entity entity, double d0, @Nullable Predicate<Entity> predicate) { return this.findNearbyPlayer(entity.locX(), entity.locY(), entity.locZ(), d0, predicate); } // Paper
+    @Nullable default EntityHuman findNearbyPlayer(double d0, double d1, double d2, double d3, @Nullable Predicate<Entity> predicate) { return a(d0, d1, d2, d3, predicate); } // Paper - OBFHELPER
+    @Nullable default EntityHuman a(double d0, double d1, double d2, double d3, @Nullable Predicate<Entity> predicate) { // Paper
         double d4 = -1.0D;
         EntityHuman entityhuman = null;
         Iterator iterator = this.getPlayers().iterator();
@@ -126,6 +127,27 @@ public interface IEntityAccess {
         return this.a(d0, d1, d2, d3, predicate);
     }
 
+    // Paper end
+    default boolean isAffectsSpawningPlayerNearby(double d0, double d1, double d2, double d3) {
+        Iterator iterator = this.getPlayers().iterator();
+        double d4;
+        do {
+            EntityHuman entityhuman;
+            do {
+                if (!iterator.hasNext()) {
+                    return false;
+                }
+
+                entityhuman = (EntityHuman) iterator.next();
+            } while (!IEntitySelector.affectsSpawning.test(entityhuman));
+
+            d4 = entityhuman.getDistanceSquared(d0, d1, d2);
+        } while (d3 >= 0.0D && d4 >= d3 * d3);
+
+        return true;
+    }
+    // Paper end
+
     default boolean isPlayerNearby(double d0, double d1, double d2, double d3) {
         Iterator iterator = this.getPlayers().iterator();
 
diff --git a/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java b/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
index 33cba4e475edc0573b901f70c61d3659fd63ad62..8d8b03074df1635946f81bec0feae18d2f3e20aa 100644
--- a/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
+++ b/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
@@ -66,7 +66,7 @@ public abstract class MobSpawnerAbstract {
     private boolean h() {
         BlockPosition blockposition = this.b();
 
-        return this.a().isPlayerNearby((double) blockposition.getX() + 0.5D, (double) blockposition.getY() + 0.5D, (double) blockposition.getZ() + 0.5D, (double) this.requiredPlayerRange);
+        return this.a().isAffectsSpawningPlayerNearby((double) blockposition.getX() + 0.5D, (double) blockposition.getY() + 0.5D, (double) blockposition.getZ() + 0.5D, (double) this.requiredPlayerRange); // Paper
     }
 
     public void c() {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 137870c7d18c9ef3ae637e83c5457d42ec40c669..e9f5ef73de6fd100dda7ed006dde6635f65b1ab5 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -1767,8 +1767,20 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     @Override
     public String getLocale() {
         return getHandle().locale;
+
+    }
+
+    // Paper start
+    public void setAffectsSpawning(boolean affects) {
+        this.getHandle().affectsSpawning = affects;
     }
 
+    @Override
+    public boolean getAffectsSpawning() {
+        return this.getHandle().affectsSpawning;
+    }
+    // Paper end
+
     @Override
     public void updateCommands() {
         if (getHandle().playerConnection == null) return;