KnockbackEnchantment.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\item\enchantment;
 
use pocketmine\entity\Entity;
use pocketmine\entity\Living;
 
class KnockbackEnchantment extends MeleeWeaponEnchantment{
 
    public function isApplicableTo(Entity $victim) : bool{
        return $victim instanceof Living;
    }
 
    public function getDamageBonus(int $enchantmentLevel) : float{
        return 0;
    }
 
    public function onPostAttack(Entity $attacker, Entity $victim, int $enchantmentLevel) : void{
        if($victim instanceof Living){
            $diff = $victim->getPosition()->subtractVector($attacker->getPosition());
            $victim->knockBack($diff->x, $diff->z, $enchantmentLevel * 0.5);
        }
    }
}