WeightedPressurePlate.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\AnalogRedstoneSignalEmitter;
use pocketmine\block\utils\AnalogRedstoneSignalEmitterTrait;
use function ceil;
use function count;
use function max;
use function min;
 
class WeightedPressurePlate extends PressurePlate implements AnalogRedstoneSignalEmitter{
    use AnalogRedstoneSignalEmitterTrait;
 
    private readonly float $signalStrengthFactor;
 
    public function __construct(BlockIdentifier $idInfo, string $name, BlockTypeInfo $typeInfo, int $deactivationDelayTicks, float $signalStrengthFactor = 1.0){
        parent::__construct($idInfo, $name, $typeInfo, $deactivationDelayTicks);
        $this->signalStrengthFactor = $signalStrengthFactor;
    }
 
    protected function hasOutputSignal() : bool{
        return $this->signalStrength > 0;
    }
 
    protected function calculatePlateState(array $entities) : array{
        $newSignalStrength = min(15, max(0,
            (int) ceil(count($entities) * $this->signalStrengthFactor)
        ));
        if($newSignalStrength === $this->signalStrength){
            return [$this, null];
        }
        $wasActive = $this->signalStrength !== 0;
        $isActive = $newSignalStrength !== 0;
        return [
            (clone $this)->setOutputSignalStrength($newSignalStrength),
            $wasActive !== $isActive ? $isActive : null
        ];
    }
}