Setting the player location?

So ive really just started learning plugins, and combining http://wiki.bukkit.org/Plugin_Tutorial and changing the events around using http://jd.bukkit.org/apidocs/ i was able to come up with this.

Code:

package com.hotmail.stevenbellamy.test;
 
import java.util.logging.Logger;
 
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.plugin.PluginDescriptionFile;
import org.bukkit.plugin.java.JavaPlugin;
 
public class test extends JavaPlugin{
    public final Logger logger = Logger.getLogger("Minecraft");
   
   
    @Override
    public void onEnable(){
        new PlayerMoveListener(this);   
       
    }
   
        public void onDisable(){
    }
}

Code:

package com.hotmail.stevenbellamy.test;
 
import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Effect;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.block.Block;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerEvent;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.plugin.Plugin;
 
public class PlayerMoveListener implements Listener{
    private Plugin plugin;
   
    public PlayerMoveListener(test plugin){
        plugin.getServer().getPluginManager().registerEvents(this, plugin);
    }
   
 
    @EventHandler
    public void onPlayerMove(PlayerMoveEvent evt, Location from) {
        Player player = evt.getPlayer();
        Location loc = evt.getPlayer().getLocation();
        if(loc.getZ() > 50 || loc.getX() > 50 || loc.getZ() < - 50 || loc.getX() < - 50){
            player.sendMessage(ChatColor.GOLD + "You cannot do that!");
            }
        }
    }

And then if your location is X,Z below or above 50 itl message you saying "You cannot do that"
I am just wondering how i would "bounce" the player back as if it were a barrier. Ive looked but cannot find a source code.

Thanks!

 

it need to be X be between -50 AND 50 AND Z between -50 and 50.
for example 0:y:0.
try:

Code:

player.sendMessage(ChatColor.GOLD + "You cannot do that!["+loc.getX()+":"+loc.getZ()+"]");

 

tabr
I think it's something like this:

Code:

player.setVelocity(player.getVelocity().getDirection().normalize().multiply(-1));

 

Im getting an error on "getDirection", undefined for the type vector.
Thanks

 

firecombat4
Woops. It's actually:

Code:

player.setVelocity(player.getDirection().normalize().multiply(-1));

 

This would throw him out of the boundary if he's walking backwards.
Your first code was correct, there was only a getDirection() too much:

Code:

player.setVelocity(player.getVelocity().normalize().multiply(-1));

BTW:

Remove 'Location from' from the method - event handlers only have one argument which is the event.

 

I tried this before, and it semi works. It spazzes you in and out of the border until you walk away from the border, where it kind of "lets you go"

 

Cancel the PlayerMoveEvent if event.getTo() is outside of the boundaries (i.e. change your code to use event.getTo() instead of event.getPlayer().getLocation() and cancel the event inside the if statement):

Code:

@EventHandler
    public void onPlayerMove(PlayerMoveEvent evt) {
        Player player = evt.getPlayer();
        Location loc = evt.getTo();
        if(loc.getZ() > 50 || loc.getX() > 50 || loc.getZ() < - 50 || loc.getX() < - 50){
            evt.setCancelled(true);
            player.setVelocity(...);
        }
    }

 

That seems to work, thank you. its very buggy but ill play around with it haha . thanks a lot

So i found out something that might work for me, Location from = evt.getFrom();, player.teleport(from);, this seems to work best but to get the bounce effect i need to get the X,Z and then take off say 5, which would teleport them 5 blocks "inside" the border. Im just wondering how i would do that as X,Z can be either negative or positive value.
Thanks heaps

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

You could use something like this:

Code:

Location to = event.getFrom();
to.setX(to.getX() < 0 ? to.getX() + 5 : to.getX() - 5);
to.setZ(...);
player.teleport(to);

I do not recomment this though, as it's wierd being teleported 5 blocks backwards (and it can cause the player to be teleported into solid blocks, possibly causing them to suffocate).

 

I will use a value such as 2 or do an extra check for blocks. But thanks man!.
Also does to.setX(to.getX() < 0 ? mean if X is bigger then 0 then do "this"? i saw the question mark in borderguards source code as well.
Thanks

 

I don't know that it is called, but it's an inlined if statement:

Code:

condition ? true-expression : false-expression

e.g. 'true ? 1 : 0' returns 1, 'x > 10 ? "yes" : "nope"' returns "yes" if x is greater than 10, otherwise it returns "nope".

 

Thats awesome!, thanks

 

It's called a 3-ary operator (takes three operators) similar to binary operators (+ - * /) which take two operators or unary operators (++ -- ! ~) which only take one operator