ProjectileItem.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;
 
use pocketmine\entity\Location;
use pocketmine\entity\projectile\Throwable;
use pocketmine\event\entity\ProjectileLaunchEvent;
use pocketmine\math\Vector3;
use pocketmine\player\Player;
use pocketmine\world\sound\ThrowSound;
 
abstract class ProjectileItem extends Item{
 
    abstract public function getThrowForce() : float;
 
    abstract protected function createEntity(Location $location, Player $thrower) : Throwable;
 
    public function onClickAir(Player $player, Vector3 $directionVector, array &$returnedItems) : ItemUseResult{
        $location = $player->getLocation();
 
        $projectile = $this->createEntity(Location::fromObject($player->getEyePos(), $player->getWorld(), $location->yaw, $location->pitch), $player);
        $projectile->setMotion($directionVector->multiply($this->getThrowForce()));
 
        $projectileEv = new ProjectileLaunchEvent($projectile);
        $projectileEv->call();
        if($projectileEv->isCancelled()){
            $projectile->flagForDespawn();
            return ItemUseResult::FAIL;
        }
 
        $projectile->spawnToAll();
 
        $location->getWorld()->addSound($location, new ThrowSound());
 
        $this->pop();
 
        return ItemUseResult::SUCCESS;
    }
}