DragonAttackTask.java

/*
    ExtraHardMode Server Plugin for Minecraft
    Copyright (C) 2012 Ryan Hamshire

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package me.ryanhamshire.ExtraHardMode;

import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.entity.EnderDragon;
import org.bukkit.entity.Entity;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Fireball;
import org.bukkit.entity.Player;
import org.bukkit.util.Vector;

public class DragonAttackTask implements Runnable {

	private Player player;
	private Entity dragon;
	
	public DragonAttackTask(Entity dragon, Player player)
	{
		this.dragon = dragon;
		this.player = player;
	}

	@Override
	public void run()
	{
		if(this.dragon.isDead()) return;
		if(!this.player.isOnline()) return;
		
		World world = this.dragon.getWorld();
		if(world != this.player.getWorld()) return;
		
		Location dragonLocation = this.dragon.getLocation();
		
		Location targetLocation;
		if(ExtraHardMode.random(20))
		{
			targetLocation = world.getHighestBlockAt(dragonLocation).getLocation();
		}
		else
		{
			targetLocation = player.getLocation();
		}		
		
		Location offsetLocation = targetLocation.add(
				ExtraHardMode.randomNumberGenerator.nextInt(10) - 5,
				ExtraHardMode.randomNumberGenerator.nextInt(3) - 1,
				ExtraHardMode.randomNumberGenerator.nextInt(10) - 5);
		
		Vector vector = new Vector(
				offsetLocation.getX() - dragonLocation.getX(), 
				offsetLocation.getY() - dragonLocation.getY(),
				offsetLocation.getZ() - dragonLocation.getZ());
				
		Fireball fireball = (Fireball)world.spawnEntity(dragonLocation.subtract(0, 1, 0), EntityType.FIREBALL);
		fireball.setShooter((EnderDragon)this.dragon);		
		fireball.setDirection(vector);
	}
}