PlayerNaturallySpawnCreaturesEvent

This event can be used for when you want to exclude a certain player
from triggering monster spawns on a server.

Also a highly more effecient way to blanket block spawns in a world

Spigot-API-Patches/PlayerNaturallySpawnCreaturesEvent.patch

@@ -0,0 +1,78 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Sun, 14 Jan 2018 17:31:37 -0500
+Subject: [PATCH] PlayerNaturallySpawnCreaturesEvent
+
+This event can be used for when you want to exclude a certain player
+from triggering monster spawns on a server.
+
+Also a highly more effecient way to blanket block spawns in a world
+
+diff --git a/src/main/java/com/destroystokyo/paper/event/entity/PlayerNaturallySpawnCreaturesEvent.java b/src/main/java/com/destroystokyo/paper/event/entity/PlayerNaturallySpawnCreaturesEvent.java
+new file mode 100644
+index 00000000..7c6953a7
+--- /dev/null
++++ b/src/main/java/com/destroystokyo/paper/event/entity/PlayerNaturallySpawnCreaturesEvent.java
+@@ -0,0 +0,0 @@
++package com.destroystokyo.paper.event.entity;
++
++import org.bukkit.entity.Player;
++import org.bukkit.event.Cancellable;
++import org.bukkit.event.Event;
++import org.bukkit.event.HandlerList;
++import org.bukkit.event.player.PlayerEvent;
++
++/**
++ * Fired when the server is calculating what chunks to try to spawn monsters in every Monster Spawn Tick event
++ */
++public class PlayerNaturallySpawnCreaturesEvent extends PlayerEvent implements Cancellable {
++    private byte radius;
++
++    public PlayerNaturallySpawnCreaturesEvent(Player player, byte radius) {
++        super(player);
++        this.radius = radius;
++    }
++
++    /**
++     * @return The radius of chunks around this player to be included in natural spawn selection
++     */
++    public byte getSpawnRadius() {
++        return radius;
++    }
++
++    /**
++     * @param radius The radius of chunks around this player to be included in natural spawn selection
++     */
++    public void setSpawnRadius(byte radius) {
++        this.radius = radius;
++    }
++
++    private static final HandlerList handlers = new HandlerList();
++
++    public HandlerList getHandlers() {
++        return handlers;
++    }
++
++    public static HandlerList getHandlerList() {
++        return handlers;
++    }
++
++    private boolean cancelled = false;
++
++    /**
++     * @return If this players chunks will be excluded from natural spawns
++     */
++    @Override
++    public boolean isCancelled() {
++        return cancelled;
++    }
++
++    /**
++     * @param cancel true if you wish to cancel this event, and not include this players chunks for natural spawning
++     */
++    @Override
++    public void setCancelled(boolean cancel) {
++        cancelled = cancel;
++    }
++}
+--

Spigot-Server-Patches/PlayerNaturallySpawnCreaturesEvent.patch

@@ -0,0 +1,31 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Sun, 14 Jan 2018 17:36:02 -0500
+Subject: [PATCH] PlayerNaturallySpawnCreaturesEvent
+
+This event can be used for when you want to exclude a certain player
+from triggering monster spawns on a server.
+
+Also a highly more effecient way to blanket block spawns in a world
+
+diff --git a/src/main/java/net/minecraft/server/SpawnerCreature.java b/src/main/java/net/minecraft/server/SpawnerCreature.java
+index 1137dda86..e205f591c 100644
+--- a/src/main/java/net/minecraft/server/SpawnerCreature.java
++++ b/src/main/java/net/minecraft/server/SpawnerCreature.java
+@@ -0,0 +0,0 @@ public final class SpawnerCreature {
+                     byte b0 = worldserver.spigotConfig.mobSpawnRange;
+                     b0 = ( b0 > worldserver.spigotConfig.viewDistance ) ? (byte) worldserver.spigotConfig.viewDistance : b0;
+                     b0 = ( b0 > 8 ) ? 8 : b0;
++                    // Paper start
++                    com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent event;
++                    event = new com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent(
++                            (org.bukkit.entity.Player) entityhuman.getBukkitEntity(), b0);
++                    if (!event.callEvent()) {
++                        continue;
++                    }
++                    b0 = event.getSpawnRadius();
++                    // Paperr end
+ 
+                     for (int i1 = -b0; i1 <= b0; ++i1) {
+                         for (k = -b0; k <= b0; ++k) {
+--