VolumePacker::getOrientationForItem() - Code Metrics - Inspection of "Use single pass mode in weight redistribution - th..." - dvdoug/BoxPacker - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( ceb4db...15ba9d )

by Doug

created 2020-04-11 19:06 UTC

VolumePacker::getOrientationForItem() A

↳ Parent: VolumePacker

Complexity

Conditions	3
Paths	4

Size

Total Lines	29
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	10
CRAP Score	3

Importance

Changes	7
Bugs	0	Features	0

Metric	Value
cc	3
eloc	10
c	7
b	0
f	0
nc	4
nop	11
dl	0
loc	29
ccs	10
cts	10
cp	1
crap	3
rs	9.9332

How to fix Many Parameters

<?php
/**
 * Box packing (3D bin packing, knapsack problem).
 *
 * @author Doug Wright
 */
declare(strict_types=1);

namespace DVDoug\BoxPacker;

use function count;
use function max;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;

/**
 * Actual packer.
 *
 * @author Doug Wright
 */
class VolumePacker implements LoggerAwareInterface
{
    /**
     * The logger instance.
     *
     * @var LoggerInterface
     */
    protected $logger;

    /**
     * Box to pack items into.
     *
     * @var Box
     */
    protected $box;

    /**
     * List of items to be packed.
     *
     * @var ItemList
     */
    protected $items;

    /**
     * Whether the packer is in look-ahead mode (i.e. working ahead of the main packing).
     *
     * @var bool
     */
    protected $singlePassMode = false;

    /**
     * @var OrientatedItemFactory
     */
    private $orientatedItemFactory;

    /** @var bool */
    private $hasConstrainedItems;

    /**
     * Constructor.
     */
    public function __construct(Box $box, ItemList $items)
    {
        $this->box = $box;
        $this->items = clone $items;

        $this->logger = new NullLogger();

        $this->hasConstrainedItems = $items->hasConstrainedItems();

        $this->orientatedItemFactory = new OrientatedItemFactory($this->box);
        $this->orientatedItemFactory->setLogger($this->logger);
    }

    /**
     * Sets a logger.
     */
    public function setLogger(LoggerInterface $logger): void
    {
        $this->logger = $logger;
        $this->orientatedItemFactory->setLogger($logger);
    }

    /**
     * @internal
     */
    public function setSinglePassMode(bool $singlePassMode): void
    {
        $this->singlePassMode = $singlePassMode;
    }

    /**
     * Pack as many items as possible into specific given box.
     *
     * @return PackedBox packed box
     */
    public function pack(): PackedBox
    {
        $this->logger->debug("[EVALUATING BOX] {$this->box->getReference()}", ['box' => $this->box]);

        $rotationsToTest = [false];
        if (!$this->singlePassMode) {
            $rotationsToTest[] = true;
        }

        $boxPermutations = [];
        foreach ($rotationsToTest as $rotation) {
            if ($rotation) {
                $boxWidth = $this->box->getInnerLength();
                $boxLength = $this->box->getInnerWidth();
            } else {
                $boxWidth = $this->box->getInnerWidth();
                $boxLength = $this->box->getInnerLength();
            }

            $boxPermutation = $this->packRotation($boxWidth, $boxLength);
            if ($boxPermutation->getItems()->count() === $this->items->count()) {
                return $boxPermutation;
            }

            $boxPermutations[] = $boxPermutation;
        }

        usort($boxPermutations, static function (PackedBox $a, PackedBox $b) {
            return $b->getVolumeUtilisation() <=> $a->getVolumeUtilisation();
        });

        return reset($boxPermutations);
    }

    /**
     * Pack as many items as possible into specific given box.
     *
     * @return PackedBox packed box
     */
    protected function packRotation(int $boxWidth, int $boxLength): PackedBox
    {
        $this->logger->debug("[EVALUATING ROTATION] {$this->box->getReference()}", ['width' => $boxWidth, 'length' => $boxLength]);

        /** @var PackedLayer[] $layers */
        $layers = [];
        $items = clone $this->items;

        while ($items->count() > 0) {
            $layerStartDepth = static::getCurrentPackedDepth($layers);

            //do a preliminary layer pack to get the depth used
            $preliminaryItems = clone $items;
            $preliminaryLayer = $this->packLayer($preliminaryItems, $layers, $layerStartDepth, $boxWidth, $boxLength, $this->box->getInnerDepth() - $layerStartDepth, 0);
            if (count($preliminaryLayer->getItems()) === 0) {
                break;
            }

            if ($preliminaryLayer->getDepth() === $preliminaryLayer->getItems()[0]->getDepth()) { // preliminary === final
                $layers[] = $preliminaryLayer;
                $items = $preliminaryItems;
            } else { //redo with now-known-depth so that we can stack to that height from the first item
                $layers[] = $this->packLayer($items, $layers, $layerStartDepth, $boxWidth, $boxLength, $this->box->getInnerDepth() - $layerStartDepth, $preliminaryLayer->getDepth());
            }
        }

        if ($this->box->getInnerWidth() !== $boxWidth) {
            $layers = static::rotateLayersNinetyDegrees($layers);
        }

        if (!$this->singlePassMode && !$this->hasConstrainedItems) {
            $layers = static::stabiliseLayers($layers);
        }

        return new PackedBox($this->box, $this->getPackedItemList($layers));
    }

    /**
     * Pack items into an individual vertical layer.
     * @internal
     */
    protected function packLayer(ItemList &$items, array $layers, int $z, int $layerWidth, int $lengthLeft, int $depthLeft, int $guidelineLayerDepth): PackedLayer
    {
        $layers[] = $layer = new PackedLayer();
        $prevItem = null;
        $x = $y = $rowLength = 0;
        $skippedItems = [];
        $remainingWeightAllowed = $this->getRemainingWeightAllowed($layers);

        while ($items->count() > 0) {
            $itemToPack = $items->extract();

            //skip items that are simply too heavy or too large
            if (!$this->checkNonDimensionalConstraints($itemToPack, $layers, $remainingWeightAllowed)) {
                continue;
            }

            $orientatedItem = $this->getOrientationForItem($itemToPack, $prevItem, $items, $layers, $layerWidth - $x, $lengthLeft, $depthLeft, $rowLength, $x, $y, $z);

            if ($orientatedItem instanceof OrientatedItem) {
                $packedItem = PackedItem::fromOrientatedItem($orientatedItem, $x, $y, $z);
                $layer->insert($packedItem);
                $remainingWeightAllowed -= $itemToPack->getWeight();

                $rowLength = max($rowLength, $orientatedItem->getLength());

                //Figure out if we can stack the next item vertically on top of this rather than side by side
                //e.g. when we've packed a tall item, and have just put a shorter one next to it.
                $stackableDepth = ($guidelineLayerDepth ?: $layer->getDepth()) - $orientatedItem->getDepth();
                $stackedZ = $z + $orientatedItem->getDepth();
                $stackSkippedItems = [];
                while ($stackableDepth > 0 && $items->count() > 0) {
                    $itemToTryStacking = $items->extract();
                    $stackedItem = $this->getOrientationForItem($itemToTryStacking, $prevItem, $items, $layers, $orientatedItem->getWidth(), $orientatedItem->getLength(), $stackableDepth, $rowLength, $x, $y, $stackedZ);
                    if ($stackedItem && $this->checkNonDimensionalConstraints($itemToTryStacking, $layers, $remainingWeightAllowed)) {
                        $layer->insert(PackedItem::fromOrientatedItem($stackedItem, $x, $y, $stackedZ));
                        $remainingWeightAllowed -= $itemToTryStacking->getWeight();
                        $stackableDepth -= $stackedItem->getDepth();
                        $stackedZ += $stackedItem->getDepth();
                    } else {
                        $stackSkippedItems[] = $itemToTryStacking;
                        // abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
                        while ($items->count() > 0 && static::isSameDimensions($itemToTryStacking, $items->top())) {
                            $stackSkippedItems[] = $items->extract();
                        }
                    }
                }
                if ($stackSkippedItems) {
                    $items = ItemList::fromArray(array_merge($stackSkippedItems, iterator_to_array($items)), true);
                }
                $x += $orientatedItem->getWidth();

                $prevItem = $packedItem;
                if ($items->count() === 0) {
                    $items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
                    $skippedItems = [];
                }
            } elseif (count($layer->getItems()) === 0) { // zero items on layer
                $this->logger->debug("doesn't fit on layer even when empty, skipping for good");
                continue;
            } elseif ($items->count() > 0) { // skip for now, move on to the next item
                $this->logger->debug("doesn't fit, skipping for now");
                $skippedItems[] = $itemToPack;
                // abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
                while ($items->count() > 2 && static::isSameDimensions($itemToPack, $items->top())) {
                    $skippedItems[] = $items->extract();
                }
            } elseif ($x > 0) {
                $this->logger->debug('No more fit in width wise, resetting for new row');
                $lengthLeft -= $rowLength;
                $y += $rowLength;
                $x = $rowLength = 0;
                $skippedItems[] = $itemToPack;
                $items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
                $skippedItems = [];
                $prevItem = null;
                continue;
            } else {
                $this->logger->debug('no items fit, so starting next vertical layer');
                $skippedItems[] = $itemToPack;

                $items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);

                return $layer;
            }
        }

        return $layer;
    }

    /**
     * During packing, it is quite possible that layers have been created that aren't physically stable
     * i.e. they overhang the ones below.
     *
     * This function reorders them so that the ones with the greatest surface area are placed at the bottom
     * @param PackedLayer[] $layers
     */
    protected static function stabiliseLayers(array $layers): array
    {
        $stabiliser = new LayerStabiliser();

        return $stabiliser->stabilise($layers);
    }

    protected function getOrientationForItem(
        Item $itemToPack,
        ?PackedItem $prevItem,
        ItemList $nextItems,
        array $layers,
        int $maxWidth,
        int $maxLength,
        int $maxDepth,
        int $rowLength,
        int $x,
        int $y,
        int $z
    ): ?OrientatedItem {
        $this->logger->debug(
            "evaluating item {$itemToPack->getDescription()} for fit",
            [
                'item' => $itemToPack,
                'space' => [
                    'maxWidth' => $maxWidth,
                    'maxLength' => $maxLength,
                    'maxDepth' => $maxDepth,
                ],
            ]
        );

        $prevOrientatedItem = $prevItem ? $prevItem->toOrientatedItem() : null;
        $prevPackedItemList = $itemToPack instanceof ConstrainedPlacementItem ? $this->getPackedItemList($layers) : new PackedItemList(); // don't calculate it if not going to be used

        return $this->orientatedItemFactory->getBestOrientation($itemToPack, $prevOrientatedItem, $nextItems, $maxWidth, $maxLength, $maxDepth, $rowLength, $x, $y, $z, $prevPackedItemList, $this->singlePassMode);
    }

    /**
     * As well as purely dimensional constraints, there are other constraints that need to be met
     * e.g. weight limits or item-specific restrictions (e.g. max <x> batteries per box).
     */
    protected function checkNonDimensionalConstraints(Item $itemToPack, array $layers, int $remainingWeightAllowed): bool
    {
        $customConstraintsOK = true;
        if ($itemToPack instanceof ConstrainedItem) {
            $customConstraintsOK = $itemToPack->canBePackedInBox($this->getPackedItemList($layers), $this->box);
        }

        return $customConstraintsOK && $itemToPack->getWeight() <= $remainingWeightAllowed;
    }

    /**
     * Swap back width/length of the packed items to match orientation of the box if needed.
     * @param PackedLayer[] $oldLayers
     */
    protected static function rotateLayersNinetyDegrees($oldLayers): array
    {
        $newLayers = [];
        foreach ($oldLayers as $originalLayer) {
            $newLayer = new PackedLayer();
            foreach ($originalLayer->getItems() as $item) {
                $packedItem = new PackedItem($item->getItem(), $item->getY(), $item->getX(), $item->getZ(), $item->getLength(), $item->getWidth(), $item->getDepth());
                $newLayer->insert($packedItem);
            }
            $newLayers[] = $newLayer;
        }

        return $newLayers;
    }

    /**
     * Generate a single list of items packed.
     */
    protected function getPackedItemList(array $layers): PackedItemList
    {
        $packedItemList = new PackedItemList();
        foreach ($layers as $layer) {
            foreach ($layer->getItems() as $packedItem) {
                $packedItemList->insert($packedItem);
            }
        }

        return $packedItemList;
    }

    /**
     * Return the current packed depth.
     * @param PackedLayer[] $layers
     */
    protected static function getCurrentPackedDepth(array $layers): int
    {
        $depth = 0;
        foreach ($layers as $layer) {
            $depth += $layer->getDepth();
        }

        return $depth;
    }

    private function getRemainingWeightAllowed(array $layers): int
    {
        $remainingWeightAllowed = $this->box->getMaxWeight() - $this->box->getEmptyWeight();
        foreach ($layers as $layer) {
            $remainingWeightAllowed -= $layer->getWeight();
        }

        return $remainingWeightAllowed;
    }

    /**
     * Compare two items to see if they have same dimensions.
     */
    protected static function isSameDimensions(Item $itemA, Item $itemB): bool
    {
        if ($itemA === $itemB) {
            return true;
        }
        $itemADimensions = [$itemA->getWidth(), $itemA->getLength(), $itemA->getDepth()];
        $itemBDimensions = [$itemB->getWidth(), $itemB->getLength(), $itemB->getDepth()];
        sort($itemADimensions);
        sort($itemBDimensions);

        return $itemADimensions === $itemBDimensions;
    }
}


1		<?php
2		/**
3		* Box packing (3D bin packing, knapsack problem).
4		*
5		* @author Doug Wright
6		*/
7		declare(strict_types=1);
8
9		namespace DVDoug\BoxPacker;
10
11		use function count;
12		use function max;
13		use Psr\Log\LoggerAwareInterface;
14		use Psr\Log\LoggerInterface;
15		use Psr\Log\NullLogger;
16
17		/**
18		* Actual packer.
19		*
20		* @author Doug Wright
21		*/
22		class VolumePacker implements LoggerAwareInterface
23		{
24		/**
25		* The logger instance.
26		*
27		* @var LoggerInterface
28		*/
29		protected $logger;
30
31		/**
32		* Box to pack items into.
33		*
34		* @var Box
35		*/
36		protected $box;
37
38		/**
39		* List of items to be packed.
40		*
41		* @var ItemList
42		*/
43		protected $items;
44
45		/**
46		* Whether the packer is in look-ahead mode (i.e. working ahead of the main packing).
47		*
48		* @var bool
49		*/
50		protected $singlePassMode = false;
51
52		/**
53		* @var OrientatedItemFactory
54		*/
55		private $orientatedItemFactory;
56
57		/** @var bool */
58		private $hasConstrainedItems;
59
60		/**
61		* Constructor.
62		*/
63	56	public function __construct(Box $box, ItemList $items)
64		{
65	56	$this->box = $box;
66	56	$this->items = clone $items;
67
68	56	$this->logger = new NullLogger();
69
70	56	$this->hasConstrainedItems = $items->hasConstrainedItems();
71
72	56	$this->orientatedItemFactory = new OrientatedItemFactory($this->box);
73	56	$this->orientatedItemFactory->setLogger($this->logger);
74	56	}
75
76		/**
77		* Sets a logger.
78		*/
79	26	public function setLogger(LoggerInterface $logger): void
80		{
81	26	$this->logger = $logger;
82	26	$this->orientatedItemFactory->setLogger($logger);
83	26	}
84
85		/**
86		* @internal
87		*/
88	47	public function setSinglePassMode(bool $singlePassMode): void
89		{
90	47	$this->singlePassMode = $singlePassMode;
91	47	}
92
93		/**
94		* Pack as many items as possible into specific given box.
95		*
96		* @return PackedBox packed box
97		*/
98	56	public function pack(): PackedBox
99		{
100	56	$this->logger->debug("[EVALUATING BOX] {$this->box->getReference()}", ['box' => $this->box]);
101
102	56	$rotationsToTest = [false];
103	56	if (!$this->singlePassMode) {
104	56	$rotationsToTest[] = true;
105		}
106
107	56	$boxPermutations = [];
108	56	foreach ($rotationsToTest as $rotation) {
109	56	if ($rotation) {
110	18	$boxWidth = $this->box->getInnerLength();
111	18	$boxLength = $this->box->getInnerWidth();
112		} else {
113	56	$boxWidth = $this->box->getInnerWidth();
114	56	$boxLength = $this->box->getInnerLength();
115		}
116
117	56	$boxPermutation = $this->packRotation($boxWidth, $boxLength);
118	56	if ($boxPermutation->getItems()->count() === $this->items->count()) {
119	53	return $boxPermutation;
120		}
121
122	38	$boxPermutations[] = $boxPermutation;
123		}
124
125		usort($boxPermutations, static function (PackedBox $a, PackedBox $b) {
126	14	return $b->getVolumeUtilisation() <=> $a->getVolumeUtilisation();
127	38	});
128
129	38	return reset($boxPermutations);
130		}
131
132		/**
133		* Pack as many items as possible into specific given box.
134		*
135		* @return PackedBox packed box
136		*/
137	56	protected function packRotation(int $boxWidth, int $boxLength): PackedBox
138		{
139	56	$this->logger->debug("[EVALUATING ROTATION] {$this->box->getReference()}", ['width' => $boxWidth, 'length' => $boxLength]);
140
141		/** @var PackedLayer[] $layers */
142	56	$layers = [];
143	56	$items = clone $this->items;
144
145	56	while ($items->count() > 0) {
146	56	$layerStartDepth = static::getCurrentPackedDepth($layers);
147
148		//do a preliminary layer pack to get the depth used
149	56	$preliminaryItems = clone $items;
150	56	$preliminaryLayer = $this->packLayer($preliminaryItems, $layers, $layerStartDepth, $boxWidth, $boxLength, $this->box->getInnerDepth() - $layerStartDepth, 0);
151	56	if (count($preliminaryLayer->getItems()) === 0) {
152	35	break;
153		}
154
155	56	if ($preliminaryLayer->getDepth() === $preliminaryLayer->getItems()[0]->getDepth()) { // preliminary === final
156	56	$layers[] = $preliminaryLayer;
157	56	$items = $preliminaryItems;
158		} else { //redo with now-known-depth so that we can stack to that height from the first item
159	11	$layers[] = $this->packLayer($items, $layers, $layerStartDepth, $boxWidth, $boxLength, $this->box->getInnerDepth() - $layerStartDepth, $preliminaryLayer->getDepth());
160		}
161		}
162
163	56	if ($this->box->getInnerWidth() !== $boxWidth) {
164	8	$layers = static::rotateLayersNinetyDegrees($layers);
165		}
166
167	56	if (!$this->singlePassMode && !$this->hasConstrainedItems) {
168	56	$layers = static::stabiliseLayers($layers);
169		}
170
171	56	return new PackedBox($this->box, $this->getPackedItemList($layers));
172		}
173
174		/**
175		* Pack items into an individual vertical layer.
176		* @internal
177		*/
178	56	protected function packLayer(ItemList &$items, array $layers, int $z, int $layerWidth, int $lengthLeft, int $depthLeft, int $guidelineLayerDepth): PackedLayer
179		{
180	56	$layers[] = $layer = new PackedLayer();
181	56	$prevItem = null;
182	56	$x = $y = $rowLength = 0;
183	56	$skippedItems = [];
184	56	$remainingWeightAllowed = $this->getRemainingWeightAllowed($layers);
185
186	56	while ($items->count() > 0) {
187	56	$itemToPack = $items->extract();
188
189		//skip items that are simply too heavy or too large
190	56	if (!$this->checkNonDimensionalConstraints($itemToPack, $layers, $remainingWeightAllowed)) {
191	7	continue;
192		}
193
194	56	$orientatedItem = $this->getOrientationForItem($itemToPack, $prevItem, $items, $layers, $layerWidth - $x, $lengthLeft, $depthLeft, $rowLength, $x, $y, $z);
195
196	56	if ($orientatedItem instanceof OrientatedItem) {
197	56	$packedItem = PackedItem::fromOrientatedItem($orientatedItem, $x, $y, $z);
198	56	$layer->insert($packedItem);
199	56	$remainingWeightAllowed -= $itemToPack->getWeight();
200
201	56	$rowLength = max($rowLength, $orientatedItem->getLength());
202
203		//Figure out if we can stack the next item vertically on top of this rather than side by side
204		//e.g. when we've packed a tall item, and have just put a shorter one next to it.
205	56	$stackableDepth = ($guidelineLayerDepth ?: $layer->getDepth()) - $orientatedItem->getDepth();
206	56	$stackedZ = $z + $orientatedItem->getDepth();
207	56	$stackSkippedItems = [];
208	56	while ($stackableDepth > 0 && $items->count() > 0) {
209	17	$itemToTryStacking = $items->extract();
210	17	$stackedItem = $this->getOrientationForItem($itemToTryStacking, $prevItem, $items, $layers, $orientatedItem->getWidth(), $orientatedItem->getLength(), $stackableDepth, $rowLength, $x, $y, $stackedZ);
211	17	if ($stackedItem && $this->checkNonDimensionalConstraints($itemToTryStacking, $layers, $remainingWeightAllowed)) {
212	11	$layer->insert(PackedItem::fromOrientatedItem($stackedItem, $x, $y, $stackedZ));
213	11	$remainingWeightAllowed -= $itemToTryStacking->getWeight();
214	11	$stackableDepth -= $stackedItem->getDepth();
215	11	$stackedZ += $stackedItem->getDepth();
216		} else {
217	13	$stackSkippedItems[] = $itemToTryStacking;
218		// abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
219	13	while ($items->count() > 0 && static::isSameDimensions($itemToTryStacking, $items->top())) {
220	10	$stackSkippedItems[] = $items->extract();
221		}
222		}
223		}
224	56	if ($stackSkippedItems) {
225	13	$items = ItemList::fromArray(array_merge($stackSkippedItems, iterator_to_array($items)), true);
226		}
227	56	$x += $orientatedItem->getWidth();
228
229	56	$prevItem = $packedItem;
230	56	if ($items->count() === 0) {
231	53	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
232	56	$skippedItems = [];
233		}
234	50	} elseif (count($layer->getItems()) === 0) { // zero items on layer
235	35	$this->logger->debug("doesn't fit on layer even when empty, skipping for good");
236	35	continue;
237	49	} elseif ($items->count() > 0) { // skip for now, move on to the next item
238	41	$this->logger->debug("doesn't fit, skipping for now");
239	41	$skippedItems[] = $itemToPack;
240		// abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
241	41	while ($items->count() > 2 && static::isSameDimensions($itemToPack, $items->top())) {
242	22	$skippedItems[] = $items->extract();
243		}
244	49	} elseif ($x > 0) {
245	49	$this->logger->debug('No more fit in width wise, resetting for new row');
246	49	$lengthLeft -= $rowLength;
247	49	$y += $rowLength;
248	49	$x = $rowLength = 0;
249	49	$skippedItems[] = $itemToPack;
250	49	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
251	49	$skippedItems = [];
252	49	$prevItem = null;
253	49	continue;
254		} else {
255	43	$this->logger->debug('no items fit, so starting next vertical layer');
256	43	$skippedItems[] = $itemToPack;
257
258	43	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
259
260	43	return $layer;
261		}
262		}
263
264	56	return $layer;
265		}
266
267		/**
268		* During packing, it is quite possible that layers have been created that aren't physically stable
269		* i.e. they overhang the ones below.
270		*
271		* This function reorders them so that the ones with the greatest surface area are placed at the bottom
272		* @param PackedLayer[] $layers
273		*/
274	56	protected static function stabiliseLayers(array $layers): array
275		{
276	56	$stabiliser = new LayerStabiliser();
277
278	56	return $stabiliser->stabilise($layers);
279		}
280
281	56	protected function getOrientationForItem(
282		Item $itemToPack,
283		?PackedItem $prevItem,
284		ItemList $nextItems,
285		array $layers,
286		int $maxWidth,
287		int $maxLength,
288		int $maxDepth,
289		int $rowLength,
290		int $x,
291		int $y,
292		int $z
293		): ?OrientatedItem {
294	56	$this->logger->debug(
295	56	"evaluating item {$itemToPack->getDescription()} for fit",
296		[
297	56	'item' => $itemToPack,
298		'space' => [
299	56	'maxWidth' => $maxWidth,
300	56	'maxLength' => $maxLength,
301	56	'maxDepth' => $maxDepth,
302		],
303		]
304		);
305
306	56	$prevOrientatedItem = $prevItem ? $prevItem->toOrientatedItem() : null;
307	56	$prevPackedItemList = $itemToPack instanceof ConstrainedPlacementItem ? $this->getPackedItemList($layers) : new PackedItemList(); // don't calculate it if not going to be used
308
309	56	return $this->orientatedItemFactory->getBestOrientation($itemToPack, $prevOrientatedItem, $nextItems, $maxWidth, $maxLength, $maxDepth, $rowLength, $x, $y, $z, $prevPackedItemList, $this->singlePassMode);
310		}
311
312		/**
313		* As well as purely dimensional constraints, there are other constraints that need to be met
314		* e.g. weight limits or item-specific restrictions (e.g. max <x> batteries per box).
315		*/
316	56	protected function checkNonDimensionalConstraints(Item $itemToPack, array $layers, int $remainingWeightAllowed): bool
317		{
318	56	$customConstraintsOK = true;
319	56	if ($itemToPack instanceof ConstrainedItem) {
320	1	$customConstraintsOK = $itemToPack->canBePackedInBox($this->getPackedItemList($layers), $this->box);
321		}
322
323	56	return $customConstraintsOK && $itemToPack->getWeight() <= $remainingWeightAllowed;
324		}
325
326		/**
327		* Swap back width/length of the packed items to match orientation of the box if needed.
328		* @param PackedLayer[] $oldLayers
329		*/
330	8	protected static function rotateLayersNinetyDegrees($oldLayers): array
331		{
332	8	$newLayers = [];
333	8	foreach ($oldLayers as $originalLayer) {
334	8	$newLayer = new PackedLayer();
335	8	foreach ($originalLayer->getItems() as $item) {
336	8	$packedItem = new PackedItem($item->getItem(), $item->getY(), $item->getX(), $item->getZ(), $item->getLength(), $item->getWidth(), $item->getDepth());
337	8	$newLayer->insert($packedItem);
338		}
339	8	$newLayers[] = $newLayer;
340		}
341
342	8	return $newLayers;
343		}
344
345		/**
346		* Generate a single list of items packed.
347		*/
348	56	protected function getPackedItemList(array $layers): PackedItemList
349		{
350	56	$packedItemList = new PackedItemList();
351	56	foreach ($layers as $layer) {
352	56	foreach ($layer->getItems() as $packedItem) {
353	56	$packedItemList->insert($packedItem);
354		}
355		}
356
357	56	return $packedItemList;
358		}
359
360		/**
361		* Return the current packed depth.
362		* @param PackedLayer[] $layers
363		*/
364	56	protected static function getCurrentPackedDepth(array $layers): int
365		{
366	56	$depth = 0;
367	56	foreach ($layers as $layer) {
368	43	$depth += $layer->getDepth();
369		}
370
371	56	return $depth;
372		}
373
374	56	private function getRemainingWeightAllowed(array $layers): int
375		{
376	56	$remainingWeightAllowed = $this->box->getMaxWeight() - $this->box->getEmptyWeight();
377	56	foreach ($layers as $layer) {
378	56	$remainingWeightAllowed -= $layer->getWeight();
379		}
380
381	56	return $remainingWeightAllowed;
382		}
383
384		/**
385		* Compare two items to see if they have same dimensions.
386		*/
387	26	protected static function isSameDimensions(Item $itemA, Item $itemB): bool
388		{
389	26	if ($itemA === $itemB) {
390	19	return true;
391		}
392	10	$itemADimensions = [$itemA->getWidth(), $itemA->getLength(), $itemA->getDepth()];
393	10	$itemBDimensions = [$itemB->getWidth(), $itemB->getLength(), $itemB->getDepth()];
394	10	sort($itemADimensions);
395	10	sort($itemBDimensions);
396
397	10	return $itemADimensions === $itemBDimensions;
398		}
399		}
400

dvdoug / BoxPacker

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VolumePacker::getOrientationForItem() A

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