block/Anvil.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\block;
 
use pocketmine\block\inventory\AnvilInventory;
use pocketmine\block\utils\Fallable;
use pocketmine\block\utils\FallableTrait;
use pocketmine\block\utils\HorizontalFacingTrait;
use pocketmine\block\utils\SupportType;
use pocketmine\data\runtime\RuntimeDataDescriber;
use pocketmine\entity\object\FallingBlock;
use pocketmine\item\Item;
use pocketmine\math\AxisAlignedBB;
use pocketmine\math\Facing;
use pocketmine\math\Vector3;
use pocketmine\player\Player;
use pocketmine\world\BlockTransaction;
use pocketmine\world\sound\AnvilFallSound;
use pocketmine\world\sound\Sound;
use function lcg_value;
use function round;
 
class Anvil extends Transparent implements Fallable{
    use FallableTrait;
    use HorizontalFacingTrait;
 
    public const UNDAMAGED = 0;
    public const SLIGHTLY_DAMAGED = 1;
    public const VERY_DAMAGED = 2;
 
    private int $damage = self::UNDAMAGED;
 
    public function describeBlockItemState(RuntimeDataDescriber $w) : void{
        $w->boundedIntAuto(self::UNDAMAGED, self::VERY_DAMAGED, $this->damage);
    }
 
    protected function describeBlockOnlyState(RuntimeDataDescriber $w) : void{
        $w->horizontalFacing($this->facing);
    }
 
    public function getDamage() : int{ return $this->damage; }
 
    public function setDamage(int $damage) : self{
        if($damage < self::UNDAMAGED || $damage > self::VERY_DAMAGED){
            throw new \InvalidArgumentException("Damage must be in range " . self::UNDAMAGED . " ... " . self::VERY_DAMAGED);
        }
        $this->damage = $damage;
        return $this;
    }
 
    protected function recalculateCollisionBoxes() : array{
        return [AxisAlignedBB::one()->squash(Facing::axis(Facing::rotateY($this->facing, false)), 1 / 8)];
    }
 
    public function getSupportType(int $facing) : SupportType{
        return SupportType::NONE;
    }
 
    public function onInteract(Item $item, int $face, Vector3 $clickVector, ?Player $player = null, array &$returnedItems = []) : bool{
        if($player instanceof Player){
            $player->setCurrentWindow(new AnvilInventory($this->position));
        }
 
        return true;
    }
 
    public function place(BlockTransaction $tx, Item $item, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector, ?Player $player = null) : bool{
        if($player !== null){
            $this->facing = Facing::rotateY($player->getHorizontalFacing(), true);
        }
        return parent::place($tx, $item, $blockReplace, $blockClicked, $face, $clickVector, $player);
    }
 
    public function onHitGround(FallingBlock $blockEntity) : bool{
        if(lcg_value() < 0.05 + (round($blockEntity->getFallDistance()) - 1) * 0.05){
            if($this->damage !== self::VERY_DAMAGED){
                $this->damage = $this->damage + 1;
            }else{
                return false;
            }
        }
        return true;
    }
 
    public function getFallDamagePerBlock() : float{
        return 2.0;
    }
 
    public function getMaxFallDamage() : float{
        return 40.0;
    }
 
    public function getLandSound() : ?Sound{
        return new AnvilFallSound();
    }
}