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Bukkit Teleport Invisibility Fix
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package com.comphenix.example; | |
import java.util.ArrayList; | |
import java.util.List; | |
import net.minecraft.server.EntityPlayer; | |
import net.minecraft.server.EntityTracker; | |
import net.minecraft.server.EntityTrackerEntry; | |
import net.minecraft.server.WorldServer; | |
import org.bukkit.craftbukkit.CraftWorld; | |
import org.bukkit.craftbukkit.entity.CraftPlayer; | |
import org.bukkit.Server; | |
import org.bukkit.World; | |
import org.bukkit.entity.Entity; | |
import org.bukkit.entity.Player; | |
import org.bukkit.event.EventHandler; | |
import org.bukkit.event.EventPriority; | |
import org.bukkit.event.Listener; | |
import org.bukkit.event.player.PlayerTeleportEvent; | |
import org.bukkit.plugin.Plugin; | |
public class TeleportFix implements Listener { | |
private Server server; | |
private Plugin plugin; | |
// Try increasing this. May be dependent on lag. | |
private final int TELEPORT_FIX_DELAY = 15; // ticks | |
public TeleportFix(Plugin plugin, Server server) { | |
this.plugin = plugin; | |
this.server = server; | |
} | |
@EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true) | |
public void onPlayerTeleport(PlayerTeleportEvent event) { | |
final Player player = event.getPlayer(); | |
final int visibleDistance = server.getViewDistance() * 16; | |
// Fix the visibility issue one tick later | |
server.getScheduler().scheduleSyncDelayedTask(plugin, new Runnable() { | |
@Override | |
public void run() { | |
// Refresh nearby clients | |
updateEntities(getPlayersWithin(player, visibleDistance)); | |
System.out.println("Applying fix ... " + visibleDistance); | |
} | |
}, TELEPORT_FIX_DELAY); | |
} | |
public void updateEntities(List<Player> observers) { | |
// Refresh every single player | |
for (Player player : observers) { | |
updateEntity(player, observers); | |
} | |
} | |
@SuppressWarnings("unchecked") | |
public void updateEntity(Entity entity, List<Player> observers) { | |
World world = entity.getWorld(); | |
WorldServer worldServer = ((CraftWorld) world).getHandle(); | |
EntityTracker tracker = worldServer.tracker; | |
EntityTrackerEntry entry = (EntityTrackerEntry) tracker.trackedEntities | |
.get(entity.getEntityId()); | |
List<EntityPlayer> nmsPlayers = getNmsPlayers(observers); | |
// Force Minecraft to resend packets to the affected clients | |
entry.trackedPlayers.removeAll(nmsPlayers); | |
entry.scanPlayers(nmsPlayers); | |
} | |
private List<EntityPlayer> getNmsPlayers(List<Player> players) { | |
List<EntityPlayer> nsmPlayers = new ArrayList<EntityPlayer>(); | |
for (Player bukkitPlayer : players) { | |
CraftPlayer craftPlayer = (CraftPlayer) bukkitPlayer; | |
nsmPlayers.add(craftPlayer.getHandle()); | |
} | |
return nsmPlayers; | |
} | |
private List<Player> getPlayersWithin(Player player, int distance) { | |
List<Player> res = new ArrayList<Player>(); | |
int d2 = distance * distance; | |
for (Player p : server.getOnlinePlayers()) { | |
if (p.getWorld() == player.getWorld() | |
&& p.getLocation().distanceSquared(player.getLocation()) <= d2) { | |
res.add(p); | |
} | |
} | |
return res; | |
} | |
} |
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