Only double switch if the dimension is the same

nms-patches/PlayerList.patch

@@ -1,5 +1,5 @@
---- /home/matt/mc-dev-private//net/minecraft/server/PlayerList.java	2015-03-08 10:28:09.527576065 +0000
-+++ src/main/java/net/minecraft/server/PlayerList.java	2015-03-08 10:28:09.531576065 +0000
+--- /home/matt/mc-dev-private//net/minecraft/server/PlayerList.java	2015-03-08 10:56:47.731557415 +0000
++++ src/main/java/net/minecraft/server/PlayerList.java	2015-03-08 10:56:47.735557415 +0000
 @@ -18,6 +18,26 @@
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
@@ -367,7 +367,7 @@
          entityplayer.dimension = i;
          Object object;
  
-@@ -355,80 +509,268 @@
+@@ -355,80 +509,270 @@
          }
  
          EntityPlayer entityplayer1 = new EntityPlayer(this.server, this.server.getWorldServer(entityplayer.dimension), entityplayer.getProfile(), (PlayerInteractManager) object);
@@ -441,7 +441,9 @@
 +        // CraftBukkit start
 +        byte actualDimension = (byte) (worldserver.getWorld().getEnvironment().getId());
 +        // Force the client to refresh their chunk cache
-+        entityplayer1.playerConnection.sendPacket(new PacketPlayOutRespawn((byte) (actualDimension >= 0 ? -1 : 0), worldserver.getDifficulty(), worldserver.getWorldData().getType(), entityplayer.playerInteractManager.getGameMode()));
++        if (fromWorld.getEnvironment() == worldserver.getWorld().getEnvironment()) {
++            entityplayer1.playerConnection.sendPacket(new PacketPlayOutRespawn((byte) (actualDimension >= 0 ? -1 : 0), worldserver.getDifficulty(), worldserver.getWorldData().getType(), entityplayer.playerInteractManager.getGameMode()));
++        }
 +        entityplayer1.playerConnection.sendPacket(new PacketPlayOutRespawn(actualDimension, worldserver.getDifficulty(), worldserver.getWorldData().getType(), entityplayer1.playerInteractManager.getGameMode()));
 +        entityplayer1.spawnIn(worldserver);
 +        entityplayer1.dead = false;
@@ -674,7 +676,7 @@
          if (entity.dimension == -1) {
              d0 = MathHelper.a(d0 / d2, worldserver1.getWorldBorder().b() + 16.0D, worldserver1.getWorldBorder().d() - 16.0D);
              d1 = MathHelper.a(d1 / d2, worldserver1.getWorldBorder().c() + 16.0D, worldserver1.getWorldBorder().e() - 16.0D);
-@@ -447,6 +789,8 @@
+@@ -447,6 +791,8 @@
              BlockPosition blockposition;
  
              if (i == 1) {
@@ -683,7 +685,7 @@
                  blockposition = worldserver1.getSpawn();
              } else {
                  blockposition = worldserver1.getDimensionSpawn();
-@@ -460,15 +804,26 @@
+@@ -460,15 +806,26 @@
                  worldserver.entityJoinedWorld(entity, false);
              }
          }
@@ -712,7 +714,7 @@
                  worldserver1.addEntity(entity);
                  worldserver1.entityJoinedWorld(entity, false);
              }
-@@ -477,6 +832,7 @@
+@@ -477,6 +834,7 @@
          }
  
          entity.spawnIn(worldserver1);
@@ -720,7 +722,7 @@
      }
  
      public void tick() {
-@@ -494,6 +850,15 @@
+@@ -494,6 +852,15 @@
  
      }
  
@@ -736,7 +738,7 @@
      public void a(Packet packet, int i) {
          for (int j = 0; j < this.players.size(); ++j) {
              EntityPlayer entityplayer = (EntityPlayer) this.players.get(j);
-@@ -589,10 +954,24 @@
+@@ -589,10 +956,24 @@
  
      public void addOp(GameProfile gameprofile) {
          this.operators.add(new OpListEntry(gameprofile, this.server.p()));
@@ -761,7 +763,7 @@
      }
  
      public boolean isWhitelisted(GameProfile gameprofile) {
-@@ -600,7 +979,7 @@
+@@ -600,7 +981,7 @@
      }
  
      public boolean isOp(GameProfile gameprofile) {
@@ -770,7 +772,7 @@
      }
  
      public EntityPlayer getPlayer(String s) {
-@@ -627,6 +1006,12 @@
+@@ -627,6 +1008,12 @@
          for (int j = 0; j < this.players.size(); ++j) {
              EntityPlayer entityplayer = (EntityPlayer) this.players.get(j);
  
@@ -783,7 +785,7 @@
              if (entityplayer != entityhuman && entityplayer.dimension == i) {
                  double d4 = d0 - entityplayer.locX;
                  double d5 = d1 - entityplayer.locY;
-@@ -674,21 +1059,26 @@
+@@ -674,21 +1061,26 @@
      public void reloadWhitelist() {}
  
      public void b(EntityPlayer entityplayer, WorldServer worldserver) {
@@ -815,7 +817,7 @@
          entityplayer.playerConnection.sendPacket(new PacketPlayOutHeldItemSlot(entityplayer.inventory.itemInHandIndex));
      }
  
-@@ -701,7 +1091,7 @@
+@@ -701,7 +1093,7 @@
      }
  
      public String[] getSeenPlayers() {
@@ -824,7 +826,7 @@
      }
  
      public boolean getHasWhitelist() {
-@@ -751,16 +1141,26 @@
+@@ -751,16 +1143,26 @@
  
      public void u() {
          for (int i = 0; i < this.players.size(); ++i) {
@@ -853,7 +855,7 @@
      }
  
      public void sendMessage(IChatBaseComponent ichatbasecomponent) {
-@@ -797,8 +1197,10 @@
+@@ -797,8 +1199,10 @@
              WorldServer[] aworldserver = this.server.worldServer;
              int j = aworldserver.length;