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<?php /** * @package HikaShop for Joomla! * @version 4.4.1 * @author hikashop.com * @copyright (C) 2010-2021 HIKARI SOFTWARE. All rights reserved. * @license GNU/GPLv3 http://www.gnu.org/licenses/gpl-3.0.html */ defined('_JEXEC') or die('Restricted access'); ?><?php namespace DVDoug\BoxPacker; class PackedBoxList extends \SplMinHeap { protected $meanWeight; public function compare($boxA, $boxB) { $choice = $boxA->getItems()->count() - $boxB->getItems()->count(); if ($choice == 0) { $choice = $boxA->getVolumeUtilisation() - $boxB->getVolumeUtilisation(); } if ($choice == 0) { $choice = $boxA->getUsedVolume() - $boxB->getUsedVolume(); } if ($choice == 0) { $choice = $boxA->getWeight() - $boxB->getWeight(); } return $choice; } public function reverseCompare($boxA, $boxB) { $choice = $boxB->getItems()->count() - $boxA->getItems()->count(); if ($choice === 0) { $choice = $boxA->getBox()->getInnerVolume() - $boxB->getBox()->getInnerVolume(); } if ($choice === 0) { $choice = $boxB->getWeight() - $boxA->getWeight(); } return $choice; } public function getMeanWeight() { if (!is_null($this->meanWeight)) { return $this->meanWeight; } foreach (clone $this as $box) { $this->meanWeight += $box->getWeight(); } return $this->meanWeight /= $this->count(); } public function getWeightVariance() { $mean = $this->getMeanWeight(); $weightVariance = 0; foreach (clone $this as $box) { $weightVariance += pow($box->getWeight() - $mean, 2); } return round($weightVariance / $this->count(), 1); } public function getVolumeUtilisation() { $itemVolume = 0; $boxVolume = 0; foreach (clone $this as $box) { $boxVolume += $box->getBox()->getInnerVolume(); foreach (clone $box->getItems() as $item) { $itemVolume += $item->getVolume(); } } return round($itemVolume / $boxVolume * 100, 1); } public function insertFromArray(array $boxes) { foreach ($boxes as $box) { $this->insert($box); } } }
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