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<?php |
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/** |
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* Box packing (3D bin packing, knapsack problem). |
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* |
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* @author Doug Wright |
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*/ |
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namespace DVDoug\BoxPacker; |
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use RuntimeException; |
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/** |
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* A "box" with items. |
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* |
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* @author Doug Wright |
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*/ |
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class PackedBox |
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{ |
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/** |
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* Box used. |
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* |
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* @var Box |
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*/ |
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protected $box; |
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/** |
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* Items in the box. |
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* |
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* @var ItemList |
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*/ |
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protected $items; |
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/** |
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* Total weight of box. |
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* |
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* @var int |
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*/ |
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protected $weight; |
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/** |
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* Total weight of items in the box. |
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* |
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* @var int |
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*/ |
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protected $itemWeight; |
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/** |
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* Remaining width inside box for another item. |
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* |
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* @var int |
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*/ |
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protected $remainingWidth; |
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/** |
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* Remaining length inside box for another item. |
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* |
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* @var int |
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*/ |
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protected $remainingLength; |
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/** |
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* Remaining depth inside box for another item. |
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* |
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* @var int |
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*/ |
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protected $remainingDepth; |
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/** |
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* Remaining weight inside box for another item. |
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* |
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* @var int |
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*/ |
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protected $remainingWeight; |
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/** |
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* Used width inside box for packing items. |
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* |
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* @var int |
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*/ |
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protected $usedWidth; |
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/** |
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* Used length inside box for packing items. |
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* |
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* @var int |
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*/ |
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protected $usedLength; |
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/** |
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* Used depth inside box for packing items. |
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* |
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* @var int |
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*/ |
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protected $usedDepth; |
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/** |
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* @var PackedItemList |
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*/ |
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protected $packedItemList; |
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/** |
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* Get box used. |
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* |
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* @return Box |
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*/ |
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public function getBox() |
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{ |
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return $this->box; |
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} |
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/** |
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* Get items packed. |
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* |
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* @return ItemList |
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*/ |
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public function getItems() |
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{ |
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return $this->items; |
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} |
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/** |
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* Get packed weight. |
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* |
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* @return int weight in grams |
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*/ |
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public function getWeight() |
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{ |
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return $this->box->getEmptyWeight() + $this->getItemWeight(); |
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} |
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/** |
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* Get packed weight of the items only. |
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* |
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* @return int weight in grams |
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*/ |
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public function getItemWeight() |
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{ |
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if (!is_null($this->itemWeight)) { |
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return $this->itemWeight; |
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} |
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$this->itemWeight = 0; |
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/** @var Item $item */ |
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foreach (clone $this->items as $item) { |
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$this->itemWeight += $item->getWeight(); |
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} |
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return $this->itemWeight; |
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} |
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/** |
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* Get remaining width inside box for another item. |
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* |
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* @return int |
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*/ |
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public function getRemainingWidth() |
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{ |
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return $this->remainingWidth; |
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} |
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/** |
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* Get remaining length inside box for another item. |
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* |
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* @return int |
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*/ |
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public function getRemainingLength() |
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{ |
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return $this->remainingLength; |
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} |
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/** |
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* Get remaining depth inside box for another item. |
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* |
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* @return int |
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*/ |
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public function getRemainingDepth() |
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{ |
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return $this->remainingDepth; |
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} |
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/** |
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* Used width inside box for packing items. |
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* |
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* @return int |
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*/ |
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public function getUsedWidth() |
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{ |
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return $this->usedWidth; |
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} |
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/** |
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* Used length inside box for packing items. |
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* |
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* @return int |
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*/ |
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public function getUsedLength() |
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{ |
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return $this->usedLength; |
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} |
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/** |
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* Used depth inside box for packing items. |
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* |
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* @return int |
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*/ |
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public function getUsedDepth() |
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{ |
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return $this->usedDepth; |
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} |
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/** |
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* Get remaining weight inside box for another item. |
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* |
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* @return int |
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*/ |
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public function getRemainingWeight() |
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{ |
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return $this->remainingWeight; |
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} |
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/** |
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* @return int |
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*/ |
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public function getInnerVolume() |
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{ |
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return $this->box->getInnerWidth() * $this->box->getInnerLength() * $this->box->getInnerDepth(); |
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} |
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/** |
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* Get used volume of the packed box. |
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* |
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* @return int |
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*/ |
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public function getUsedVolume() |
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{ |
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$volume = 0; |
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/** @var PackedItem $item */ |
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foreach (clone $this->items as $item) { |
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$volume += $item->getVolume(); |
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} |
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return $volume; |
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} |
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/** |
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* Get unused volume of the packed box. |
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* |
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* @return int |
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*/ |
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public function getUnusedVolume() |
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{ |
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return $this->getInnerVolume() - $this->getUsedVolume(); |
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} |
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/** |
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* Get volume utilisation of the packed box. |
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* |
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* @return float |
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*/ |
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public function getVolumeUtilisation() |
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{ |
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$itemVolume = 0; |
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/** @var Item $item */ |
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foreach (clone $this->items as $item) { |
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$itemVolume += $item->getVolume(); |
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} |
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return round($itemVolume / $this->box->getInnerVolume() * 100, 1); |
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} |
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/** |
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* @return PackedItemList |
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*/ |
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public function getPackedItems() |
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{ |
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if (!$this->packedItemList instanceof PackedItemList) { |
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throw new RuntimeException('No PackedItemList was set. Are you using the old constructor?'); |
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} |
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return $this->packedItemList; |
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} |
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/** |
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* @param PackedItemList $packedItemList |
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*/ |
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public function setPackedItems(PackedItemList $packedItemList) |
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{ |
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$this->packedItemList = $packedItemList; |
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} |
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/** |
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* Legacy constructor. |
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* |
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* @deprecated |
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* |
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* @param Box $box |
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* @param ItemList $itemList |
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* @param int $remainingWidth |
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* @param int $remainingLength |
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* @param int $remainingDepth |
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* @param int $remainingWeight |
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* @param int $usedWidth |
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* @param int $usedLength |
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* @param int $usedDepth |
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*/ |
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public function __construct( |
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Box $box, |
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ItemList $itemList, |
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$remainingWidth, |
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$remainingLength, |
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$remainingDepth, |
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$remainingWeight, |
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$usedWidth, |
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$usedLength, |
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$usedDepth |
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) { |
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$this->box = $box; |
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$this->items = $itemList; |
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$this->remainingWidth = $remainingWidth; |
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$this->remainingLength = $remainingLength; |
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$this->remainingDepth = $remainingDepth; |
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$this->remainingWeight = $remainingWeight; |
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$this->usedWidth = $usedWidth; |
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$this->usedLength = $usedLength; |
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$this->usedDepth = $usedDepth; |
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} |
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/** |
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* The constructor from v3. |
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* |
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* @param Box $box |
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* @param PackedItemList $packedItems |
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* |
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* @return self |
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*/ |
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public static function fromPackedItemList(Box $box, PackedItemList $packedItems) |
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{ |
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$maxWidth = $maxLength = $maxDepth = $weight = 0; |
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/** @var PackedItem $item */ |
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foreach (clone $packedItems as $item) { |
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$maxWidth = max($maxWidth, $item->getX() + $item->getWidth()); |
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$maxLength = max($maxLength, $item->getY() + $item->getLength()); |
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$maxDepth = max($maxDepth, $item->getZ() + $item->getDepth()); |
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$weight += $item->getItem()->getWeight(); |
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} |
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$packedBox = new self( |
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$box, |
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$packedItems->asItemList(), |
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$box->getInnerWidth() - $maxWidth, |
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$box->getInnerLength() - $maxLength, |
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$box->getInnerDepth() - $maxDepth, |
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$box->getMaxWeight() - $box->getEmptyWeight() - $weight, |
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$maxWidth, |
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$maxLength, |
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$maxDepth |
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); |
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$packedBox->setPackedItems($packedItems); |
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return $packedBox; |
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} |
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} |
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