CropGrowthHelper.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\utils;
 
use pocketmine\block\Block;
use pocketmine\block\Farmland;
use function mt_rand;
 
final class CropGrowthHelper{
 
    private const ON_HYDRATED_FARMLAND_BONUS = 3;
    private const ON_DRY_FARMLAND_BONUS = 1;
    private const ADJACENT_HYDRATED_FARMLAND_BONUS = 3 / 4;
    private const ADJACENT_DRY_FARMLAND_BONUS = 1 / 4;
 
    private const IMPROPER_ARRANGEMENT_DIVISOR = 2;
 
    private const MIN_LIGHT_LEVEL = 9;
 
    private function __construct(){
        //NOOP
    }
 
    public static function calculateMultiplier(Block $block) : float{
        $result = 1;
 
        $position = $block->getPosition();
 
        $world = $position->getWorld();
        $baseX = $position->getFloorX();
        $baseY = $position->getFloorY();
        $baseZ = $position->getFloorZ();
 
        $farmland = $world->getBlockAt($baseX, $baseY - 1, $baseZ);
 
        if($farmland instanceof Farmland){
            $result += $farmland->getWetness() > 0 ? self::ON_HYDRATED_FARMLAND_BONUS : self::ON_DRY_FARMLAND_BONUS;
        }
 
        $xRow = false;
        $zRow = false;
        $improperArrangement = false;
 
        for($x = -1; $x <= 1; $x++){
            for($z = -1; $z <= 1; $z++){
                if($x === 0 && $z === 0){
                    continue;
                }
                $nextFarmland = $world->getBlockAt($baseX + $x, $baseY - 1, $baseZ + $z);
 
                if(!$nextFarmland instanceof Farmland){
                    continue;
                }
 
                $result += $nextFarmland->getWetness() > 0 ? self::ADJACENT_HYDRATED_FARMLAND_BONUS : self::ADJACENT_DRY_FARMLAND_BONUS;
 
                if(!$improperArrangement){
                    $nextCrop = $world->getBlockAt($baseX + $x, $baseY, $baseZ + $z);
                    if($nextCrop->hasSameTypeId($block)){
                        match(0){
                            $x => $zRow ? $improperArrangement = true : $xRow = true,
                            $z => $xRow ? $improperArrangement = true : $zRow = true,
                            default => $improperArrangement = true,
                        };
                    }
                }
            }
        }
 
        //crops can be arranged in rows, but the rows must not cross and must be spaced apart by at least one block
        if($improperArrangement){
            $result /= self::IMPROPER_ARRANGEMENT_DIVISOR;
        }
 
        return $result;
    }
 
    public static function hasEnoughLight(Block $block, int $minLevel = self::MIN_LIGHT_LEVEL) : bool{
        $position = $block->getPosition();
        $world = $position->getWorld();
 
        //crop growth is not affected by time of day since 1.11 or so
        return $world->getPotentialLightAt($position->x, $position->y, $position->z) >= $minLevel;
    }
 
    public static function canGrow(Block $block) : bool{
        //while it may be tempting to use mt_rand(0, 25) < multiplier, this would make crops grow a bit faster than
        //vanilla in most cases due to the remainder of 25 / multiplier not being discarded
        return mt_rand(0, (int) (25 / self::calculateMultiplier($block))) === 0 && self::hasEnoughLight($block);
    }
}