FrostedIce.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\utils\AgeableTrait;
use pocketmine\block\utils\BlockEventHelper;
use function mt_rand;
 
class FrostedIce extends Ice{
    use AgeableTrait;
 
    public const MAX_AGE = 3;
 
    public function onNearbyBlockChange() : void{
        $this->position->getWorld()->scheduleDelayedBlockUpdate($this->position, mt_rand(20, 40));
    }
 
    public function onRandomTick() : void{
        $world = $this->position->getWorld();
        if((!$this->checkAdjacentBlocks(4) || mt_rand(0, 2) === 0) &&
            $world->getHighestAdjacentFullLightAt($this->position->x, $this->position->y, $this->position->z) >= 12 - $this->age){
            if($this->tryMelt()){
                foreach($this->getAllSides() as $block){
                    if($block instanceof FrostedIce){
                        $block->tryMelt();
                    }
                }
            }
        }else{
            $world->scheduleDelayedBlockUpdate($this->position, mt_rand(20, 40));
        }
    }
 
    public function onScheduledUpdate() : void{
        $this->onRandomTick();
    }
 
    private function checkAdjacentBlocks(int $requirement) : bool{
        $found = 0;
        for($x = -1; $x <= 1; ++$x){
            for($z = -1; $z <= 1; ++$z){
                if($x === 0 && $z === 0){
                    continue;
                }
                if(
                    $this->position->getWorld()->getBlockAt($this->position->x + $x, $this->position->y, $this->position->z + $z) instanceof FrostedIce &&
                    ++$found >= $requirement
                ){
                    return true;
                }
            }
        }
        return false;
    }
 
    private function tryMelt() : bool{
        $world = $this->position->getWorld();
        if($this->age >= self::MAX_AGE){
            BlockEventHelper::melt($this, VanillaBlocks::WATER());
            return true;
        }
 
        $this->age++;
        $world->setBlock($this->position, $this);
        $world->scheduleDelayedBlockUpdate($this->position, mt_rand(20, 40));
        return false;
    }
}