What's getOrigin and getTarget at EntityLevelChangeEvent?

Can you teach me how to use getOrigin and getTarget?

 

Pls teach me how to use getOrigin and getTarget in EntityLevelChangeEvent

 

getOrigin() Returns a level instance of the level the entity originated from.
getTarget() Returns a level instance of the level the entity wants to go to.
So you can do it like this (assuming the variable name is $event):

PHP:

$originalLevel = $event->getOrigin();
$targetLevel = $event->getTarget();


And then you can do stuff with with these two levels

 

How to get players in target/origin world?

 

PHP:

public function onLevelChange(EntityLevelChangeEvent $event){
  $player = $event->getEntity();
  $origin = $event->getOrigin();
  $target = $event->getTarget();
  if($player instanceof Player) return;
  
  if($origin instanceof Level){
   //Like this? sorry I'm trying to learning
  }
     if($target instanceof Level) {
      //Like this? sorry I'm trying to learning
  }
 }

 

you don't need to check if it's an instance of a Level since it only returns a Level
so you can remove these two

PHP:

if($origin instanceof Level){
   //Like this? sorry I'm trying to learning
}
if($target instanceof Level) {
    //Like this? sorry I'm trying to learning
}


also what are you using that for?

PHP:

if($player instanceof Player) return;


Can you tell me what are you trying to do so i can help :>

 

When one player enters the target level, all players at the target level will get a message, if 1 player leaves the world, all players in origin level will get a message

 

Like this
If player join the target world, all players will get message like this:
» <player name> Joined the world

If player leave the world, all players will get message like this:
» <player name> Leave the world

 

PHP:

public function onLevelChange(EntityLevelChangeEvent $event){
    if(!($player = $event->getEntity()) instanceof Player) {
       return; // Ignore if not player
    }
    $sendMessage = function(Level $level, string $message) use ($player) {
       foreach($level->getPlayers() as $p) {
          if($p !== $player) $p->sendMessage($player);
       }
    };

    $sendMessage($event->getOrigin(), "{$player->getDisplayName()} left the level";
    $sendMessage($event->getTarget(), "{$player->getDisplayName()} entered the level";
}

 

^

 

Not Working

 

did you register the event?
it's easy to do it
first you implement the Listener interface by adding this after your class name

PHP:

implements Listener


then register it in onEnable function

PHP:

public function onEnable(){
           $this->getServer()->getPluginManager()->registerEvents($this, $this);
}


 

Yes i registered the events

PHP:

$this->getServer()->getPluginManager()->registerEvents(new EventListener($this), $this);

 

Thanks for feedback! I'm really loosing faith in humanity.