Freezing Ghasts

I am trying to make a plugin where you spawn ghasts that are stuck in place and just shoot at people. In this code this ghast spawns but moves at normal speed. If anyone knows how to freeze them it would be greatly appreciated. Thanks!

Code:java

                Ghast entity = (Ghast) Locations.ghast(i).getWorld().spawnEntity(Locations.ghast(i), EntityType.GHAST);
                entity.addPotionEffect(new PotionEffect(PotionEffectType.SLOW, Integer.MAX_VALUE, 10)); //also tried 30 instead of 10 which had no effect

 

First thing that came to my mind. Don't quote me on this.

Code:java

Bukkit.getServer().getScheduler().scheduleSyncRepeatingTask(this, new Runnable(){
    public void run(){
        for(World w : Bukkit.getWorlds())
            for(Entity e : w.getEntities())
                if(e.getType() == EntityType.GHAST)
                    e.teleport(e.getLocation());
    }
}, 0L, 1L);

 

What you can do is create a BukkitRunnable, (there might be another way to it though) and for each amount of tick... teleport the ghast to its same location. You can also check if entity.getLocation.getBlockX() == loc.getBlockX(), and if its not tp (Don't forget getBlockY() and getBlockZ() )... just a cleaner way i think.

 

Yeah to be honest that just sounds like a lag machine waiting to happen
Also, not sure they would be able to aim and shoot if they are getting repeatedly teleported. But thanks for the idea!

 

stormneo7
But the problem with that is, that it will loop through all worlds, and all entities, and it will freeze all the poor Ghasts out there. It makes the plugin do more work on the server if you know what i mean.

 

stormneo7 Whoops, just noticed your post. It is essentially the same ideas as artish1 and as I said, look slike it could lag alot and I don't think the ghasts would be able to aim if they are getting teleporting every tick.

 

Unfortunately, there isn't an EntityMoveEvent yet

 

The Fancy Whale let them ride something that doesn't move

 

But the thing that doesn't move would have to be floating in mid air? Then the same issue occurs where I would be repeatedly teleporting the entity right?

 

The Fancy Whale
No... what you can do is let them ride an Item(Entity). And Spawn it before the Ghast gets spawned... then put the Ghast on it

 

But where would I spawn the item? In the air? Wouldn't it just fall to the ground?

 

The Fancy Whale holograms use wither skulls (to keep horses in the air)
Though you would have to check how you can properly freeze those (I know it is possible through NMS, but I am not sure how well a Bukkit only approach works out)

 

The Fancy Whale
Oh i see.. you want it to "FLOAT".... lol mb.

 

fireblast709 artish1 Maybe there is a plugin with an EntityMoveEvent API. I feel like there is but I can't think of the name or find it on google...
EDIT: could try http://dev.bukkit.org/bukkit-plugins/bkcommonlib/ but I'd have to restart everything into a maven project I think...

 

The Fancy Whale
Hmmm... or you can create your own custom Ghast, (MyGhast extends EntityGhast)
Then look through the methods and check which one fires when the ghast moves...you can do something around there... then you can either 1)Make your own GhastMoveEvent and cancel it there or 2) Cancel it (return at the method itself... so it will stay where u spawned it in forever... then initialize the Custom Ghast into the Bukkit server.

Edit: i meant to say "Register" the Ghast into the server.

 

artish1 fireblast709 Just looked into BKCommonLib which has entity move event https://github.com/bergerkiller/BKC...ukkit/common/controller/EntityController.java
but you can not cancel it :/

 

The Fancy Whale can you set the location it moves to?

 

The Fancy Whale Made a class with the help from the resource by Goblom where you can tp ghasts back to there location every half second with no lag unless you run the command a crap ton:

Code:java

package me.online.AdvancedPVP;
 
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
 
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Ghast;
import org.bukkit.entity.LivingEntity;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.server.PluginDisableEvent;
import org.bukkit.event.world.WorldUnloadEvent;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scheduler.BukkitScheduler;
import org.bukkit.scheduler.BukkitTask;
 
public class Commands extends JavaPlugin implements Listener{
 
    public void onEnable() {
        Bukkit.getServer().getPluginManager().registerEvents(this, this);
        getConfig().options().copyDefaults(true);
        saveDefaultConfig();
        tasks.add(bs.runTaskTimer(this, new Freeze(), 0, 10L)); //plugin represents your JavaPlugin
        pm.registerEvents(this, this);
    }
 
    @Override
    public boolean onCommand(CommandSender sender, Command command,
            String label, String[] args) {
        if(command.getName().equalsIgnoreCase("ghast")){
            if(sender instanceof Player){
                Player pl = (Player) sender;
                Ghast ghast = (Ghast) pl.getWorld().spawnEntity(pl.getLocation(), EntityType.GHAST);
                frozen.put(ghast.getUniqueId(), ghast.getLocation());
 
            }
        }
        return false;
    }
    public static Map<UUID, Location> frozen = new HashMap<UUID, Location>();
    private Set<BukkitTask> tasks = new HashSet<BukkitTask>();
 
    private BukkitScheduler bs = Bukkit.getScheduler();
    private PluginManager pm = Bukkit.getPluginManager();
    @EventHandler
    public void onPluginDisable(PluginDisableEvent event) {
        for (BukkitTask task : tasks) {
            task.cancel();
        }
    }
 
    @EventHandler
    public void onWorldUnload(WorldUnloadEvent event) {
        for (LivingEntity ent : event.getWorld().getLivingEntities()) {
            UUID id = ent.getUniqueId();
            if (frozen.containsKey(id)) frozen.remove(id);
        }
    }
 
    private class Freeze implements Runnable {
        @Override
        public void run() {
            for (World world : Bukkit.getWorlds()) {
                for (LivingEntity ent : world.getLivingEntities()) {
                    UUID id = ent.getUniqueId();
                    if (frozen.containsKey(id)) ent.teleport(frozen.get(id));
                }
            }
        }
    }
 
}