item/Trident.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\block\Block;
use pocketmine\entity\Entity;
use pocketmine\entity\Location;
use pocketmine\entity\projectile\Trident as TridentEntity;
use pocketmine\event\entity\ProjectileLaunchEvent;
use pocketmine\player\Player;
use pocketmine\world\sound\TridentThrowSound;
use function min;
 
class Trident extends Tool implements Releasable{
    private const DAMAGE_ON_THROW = 1;
 
    public function getMaxDurability() : int{
        return 251;
    }
 
    public function onReleaseUsing(Player $player, array &$returnedItems) : ItemUseResult{
        $location = $player->getLocation();
 
        $diff = $player->getItemUseDuration();
        if($diff < 14){
            return ItemUseResult::FAIL;
        }
 
        $item = $this->pop();
        if($player->hasFiniteResources()){
            $item->applyDamage(self::DAMAGE_ON_THROW);
        }
        if($item->isNull()){
            //canStartUsingItem() will normally prevent this, but it's possible the item might've been modified between
            //the start action and the release, so it's best to account for this anyway
            return ItemUseResult::FAIL;
        }
        $entity = new TridentEntity(Location::fromObject(
            $player->getEyePos(),
            $player->getWorld(),
            ($location->yaw > 180 ? 360 : 0) - $location->yaw,
            -$location->pitch
        ), $item, $player);
        $p = $diff / 20;
        $baseForce = min((($p ** 2) + $p * 2) / 3, 1) * 2.4;
        $entity->setMotion($player->getDirectionVector()->multiply($baseForce));
 
        $ev = new ProjectileLaunchEvent($entity);
        $ev->call();
        if($ev->isCancelled()){
            $ev->getEntity()->flagForDespawn();
            return ItemUseResult::FAIL;
        }
        $ev->getEntity()->spawnToAll();
        $location->getWorld()->addSound($location, new TridentThrowSound());
 
        return ItemUseResult::SUCCESS;
    }
 
    public function getAttackPoints() : int{
        return 9;
    }
 
    public function canStartUsingItem(Player $player) : bool{
        return $this->damage < $this->getMaxDurability() - self::DAMAGE_ON_THROW;
    }
 
    public function onAttackEntity(Entity $victim, array &$returnedItems) : bool{
        return $this->applyDamage(1);
    }
 
    public function onDestroyBlock(Block $block, array &$returnedItems) : bool{
        if(!$block->getBreakInfo()->breaksInstantly()){
            return $this->applyDamage(2);
        }
        return false;
    }
}