From 584b8849dacaeaf44c6c2781d1ebcfc6a6e59526 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 13 Apr 2016 02:10:49 -0400
Subject: [PATCH] Configurable Player Collision


diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
index 22c7dea..24fb01c 100644
--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
@@ -218,4 +218,9 @@ public class PaperConfig {
     private static void regionFileCacheSize() {
         regionFileCacheSize = getInt("settings.region-file-cache-size", 256);
     }
+
+    public static boolean enablePlayerCollisions = true;
+    private static void enablePlayerCollisions() {
+        enablePlayerCollisions = getBoolean("settings.enable-player-collisions", true);
+    }
 }
diff --git a/src/main/java/net/minecraft/server/PacketPlayOutScoreboardTeam.java b/src/main/java/net/minecraft/server/PacketPlayOutScoreboardTeam.java
index d8ec504..eb45d3c 100644
--- a/src/main/java/net/minecraft/server/PacketPlayOutScoreboardTeam.java
+++ b/src/main/java/net/minecraft/server/PacketPlayOutScoreboardTeam.java
@@ -96,7 +96,7 @@ public class PacketPlayOutScoreboardTeam implements Packet<PacketListenerPlayOut
             packetdataserializer.a(this.d);
             packetdataserializer.writeByte(this.j);
             packetdataserializer.a(this.e);
-            packetdataserializer.a(this.f);
+            packetdataserializer.a(!com.destroystokyo.paper.PaperConfig.enablePlayerCollisions ? "never" : this.f); // Paper
             packetdataserializer.writeByte(this.g);
         }
 
diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
index 91e52f9..f133b32 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -241,6 +241,14 @@ public abstract class PlayerList {
     public void sendScoreboard(ScoreboardServer scoreboardserver, EntityPlayer entityplayer) {
         HashSet hashset = Sets.newHashSet();
         Iterator iterator = scoreboardserver.getTeams().iterator();
+        
+        // Paper start - Send a fake team to the client to initialize collision rule if no others exist
+        if (!com.destroystokyo.paper.PaperConfig.enablePlayerCollisions && !iterator.hasNext()) {
+            String teamName = org.apache.commons.lang3.StringUtils.left("collideRule_" + entityplayer.getWorld().random.nextInt(), 16);
+            entityplayer.playerConnection.sendPacket(new PacketPlayOutScoreboardTeam(new ScoreboardTeam(scoreboardserver, teamName), 0));
+            return;
+        }
+        // Paper end
 
         while (iterator.hasNext()) {
             ScoreboardTeam scoreboardteam = (ScoreboardTeam) iterator.next();
-- 
2.9.2.windows.1