VolumePacker::setSinglePassMode() - Code Metrics - Inspection of "Bump min PHPUnit versions to latest (pick up PHP8...." - dvdoug/BoxPacker - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — 3.x ( 05eab4...5fb647 )

by Doug

created 2021-09-12 23:37 UTC

VolumePacker::setSinglePassMode() A

↳ Parent: VolumePacker

Complexity

Conditions	2
Paths	2

Size

Total Lines	7
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	2

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
cc	2
eloc	4
c	2
b	0
f	0
nc	2
nop	1
dl	0
loc	7
ccs	5
cts	5
cp	1
crap	2
rs	10

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

namespace DVDoug\BoxPacker;

use function array_map;
use function count;
use function max;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
use function reset;
use function usort;

/**
 * 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 single-pass mode.
     *
     * @var bool
     */
    protected $singlePassMode = false;

    /**
     * Whether the packer should only try packing along the width.
     *
     * @var bool
     */
    protected $packAcrossWidthOnly = false;

    /**
     * @var LayerPacker
     */
    private $layerPacker;

    /**
     * @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();

        $this->layerPacker = new LayerPacker($this->box);
        $this->layerPacker->setLogger($this->logger);
    }

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

    public function packAcrossWidthOnly(): void
    {
        $this->packAcrossWidthOnly = true;
    }

    /**
     * @internal
     */
    public function setSinglePassMode(bool $singlePassMode): void
    {
        $this->singlePassMode = $singlePassMode;
        if ($singlePassMode) {
            $this->packAcrossWidthOnly = true;
        }
        $this->layerPacker->setSinglePassMode($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->packAcrossWidthOnly) {
            $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
     */
    private 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);
            $packedItemList = $this->getPackedItemList($layers);

            //do a preliminary layer pack to get the depth used
            $preliminaryItems = clone $items;
            $preliminaryLayer = $this->layerPacker->packLayer($preliminaryItems, clone $packedItemList, 0, 0, $layerStartDepth, $boxWidth, $boxLength, $this->box->getInnerDepth() - $layerStartDepth, 0, true);
            if (count($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[] = $this->layerPacker->packLayer($items, $packedItemList, 0, 0, $layerStartDepth, $boxWidth, $boxLength, $this->box->getInnerDepth() - $layerStartDepth, $preliminaryLayer->getDepth(), true);
            }
        }

        if (!$this->singlePassMode && $layers) {
            $layers = $this->stabiliseLayers($layers);

            // having packed layers, there may be tall, narrow gaps at the ends that can be utilised
            $maxLayerWidth = max(array_map(static function (PackedLayer $layer) {
                return $layer->getEndX();
            }, $layers));
            $layers[] = $this->layerPacker->packLayer($items, $this->getPackedItemList($layers), $maxLayerWidth, 0, 0, $boxWidth, $boxLength, $this->box->getInnerDepth(), $this->box->getInnerDepth(), false);

            $maxLayerLength = max(array_map(static function (PackedLayer $layer) {
                return $layer->getEndY();
            }, $layers));
            $layers[] = $this->layerPacker->packLayer($items, $this->getPackedItemList($layers), 0, $maxLayerLength, 0, $boxWidth, $boxLength, $this->box->getInnerDepth(), $this->box->getInnerDepth(), false);
        }

        $layers = $this->correctLayerRotation($layers, $boxWidth);

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

    /**
     * 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[] $oldLayers
     * @return PackedLayer[]
     */
    private function stabiliseLayers(array $oldLayers): array
    {
        if ($this->hasConstrainedItems) { // constraints include position, so cannot change
            return $oldLayers;
        }

        $stabiliser = new LayerStabiliser();

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

    /**
     * Swap back width/length of the packed items to match orientation of the box if needed.
     *
     * @param PackedLayer[] $oldLayers
     */
    private function correctLayerRotation(array $oldLayers, int $boxWidth): array
    {
        if ($this->box->getInnerWidth() === $boxWidth) {
            return $oldLayers;
        }

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

        return $depth;
    }
}


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 array_map;
12		use function count;
13		use function max;
14		use Psr\Log\LoggerAwareInterface;
15		use Psr\Log\LoggerInterface;
16		use Psr\Log\NullLogger;
17		use function reset;
18		use function usort;
19
20		/**
21		* Actual packer.
22		*
23		* @author Doug Wright
24		*/
25		class VolumePacker implements LoggerAwareInterface
26		{
27		/**
28		* The logger instance.
29		*
30		* @var LoggerInterface
31		*/
32		protected $logger;
33
34		/**
35		* Box to pack items into.
36		*
37		* @var Box
38		*/
39		protected $box;
40
41		/**
42		* List of items to be packed.
43		*
44		* @var ItemList
45		*/
46		protected $items;
47
48		/**
49		* Whether the packer is in single-pass mode.
50		*
51		* @var bool
52		*/
53		protected $singlePassMode = false;
54
55		/**
56		* Whether the packer should only try packing along the width.
57		*
58		* @var bool
59		*/
60		protected $packAcrossWidthOnly = false;
61
62		/**
63		* @var LayerPacker
64		*/
65		private $layerPacker;
66
67		/**
68		* @var bool
69		*/
70		private $hasConstrainedItems;
71
72		/**
73		* Constructor.
74		*/
75	82	public function __construct(Box $box, ItemList $items)
76		{
77	82	$this->box = $box;
78	82	$this->items = clone $items;
79
80	82	$this->logger = new NullLogger();
81
82	82	$this->hasConstrainedItems = $items->hasConstrainedItems();
83
84	82	$this->layerPacker = new LayerPacker($this->box);
85	82	$this->layerPacker->setLogger($this->logger);
86	82	}
87
88		/**
89		* Sets a logger.
90		*/
91	22	public function setLogger(LoggerInterface $logger): void
92		{
93	22	$this->logger = $logger;
94	22	$this->layerPacker->setLogger($logger);
95	22	}
96
97		public function packAcrossWidthOnly(): void
98		{
99		$this->packAcrossWidthOnly = true;
100		}
101
102		/**
103		* @internal
104		*/
105	26	public function setSinglePassMode(bool $singlePassMode): void
106		{
107	26	$this->singlePassMode = $singlePassMode;
108	26	if ($singlePassMode) {
109	4	$this->packAcrossWidthOnly = true;
110		}
111	26	$this->layerPacker->setSinglePassMode($singlePassMode);
112	26	}
113
114		/**
115		* Pack as many items as possible into specific given box.
116		*
117		* @return PackedBox packed box
118		*/
119	82	public function pack(): PackedBox
120		{
121	82	$this->logger->debug("[EVALUATING BOX] {$this->box->getReference()}", ['box' => $this->box]);
122
123	82	$rotationsToTest = [false];
124	82	if (!$this->packAcrossWidthOnly) {
125	82	$rotationsToTest[] = true;
126		}
127
128	82	$boxPermutations = [];
129	82	foreach ($rotationsToTest as $rotation) {
130	82	if ($rotation) {
131	12	$boxWidth = $this->box->getInnerLength();
132	12	$boxLength = $this->box->getInnerWidth();
133		} else {
134	82	$boxWidth = $this->box->getInnerWidth();
135	82	$boxLength = $this->box->getInnerLength();
136		}
137
138	82	$boxPermutation = $this->packRotation($boxWidth, $boxLength);
139	82	if ($boxPermutation->getItems()->count() === $this->items->count()) {
140	74	return $boxPermutation;
141		}
142
143	14	$boxPermutations[] = $boxPermutation;
144		}
145
146	14	usort($boxPermutations, static function (PackedBox $a, PackedBox $b) {
147	12	return $b->getVolumeUtilisation() <=> $a->getVolumeUtilisation();
148	14	});
149
150	14	return reset($boxPermutations);
151		}
152
153		/**
154		* Pack as many items as possible into specific given box.
155		*
156		* @return PackedBox packed box
157		*/
158	82	private function packRotation(int $boxWidth, int $boxLength): PackedBox
159		{
160	82	$this->logger->debug("[EVALUATING ROTATION] {$this->box->getReference()}", ['width' => $boxWidth, 'length' => $boxLength]);
161
162		/** @var PackedLayer[] $layers */
163	82	$layers = [];
164	82	$items = clone $this->items;
165
166	82	while ($items->count() > 0) {
167	82	$layerStartDepth = static::getCurrentPackedDepth($layers);
168	82	$packedItemList = $this->getPackedItemList($layers);
169
170		//do a preliminary layer pack to get the depth used
171	82	$preliminaryItems = clone $items;
172	82	$preliminaryLayer = $this->layerPacker->packLayer($preliminaryItems, clone $packedItemList, 0, 0, $layerStartDepth, $boxWidth, $boxLength, $this->box->getInnerDepth() - $layerStartDepth, 0, true);
173	82	if (count($preliminaryLayer->getItems()) === 0) {
174	10	break;
175		}
176
177	82	if ($preliminaryLayer->getDepth() === $preliminaryLayer->getItems()[0]->getDepth()) { // preliminary === final
178	80	$layers[] = $preliminaryLayer;
179	80	$items = $preliminaryItems;
180		} else { //redo with now-known-depth so that we can stack to that height from the first item
181	4	$layers[] = $this->layerPacker->packLayer($items, $packedItemList, 0, 0, $layerStartDepth, $boxWidth, $boxLength, $this->box->getInnerDepth() - $layerStartDepth, $preliminaryLayer->getDepth(), true);
182		}
183		}
184
185	82	if (!$this->singlePassMode && $layers) {
186	82	$layers = $this->stabiliseLayers($layers);
187
188		// having packed layers, there may be tall, narrow gaps at the ends that can be utilised
189	82	$maxLayerWidth = max(array_map(static function (PackedLayer $layer) {
190	82	return $layer->getEndX();
191	82	}, $layers));
192	82	$layers[] = $this->layerPacker->packLayer($items, $this->getPackedItemList($layers), $maxLayerWidth, 0, 0, $boxWidth, $boxLength, $this->box->getInnerDepth(), $this->box->getInnerDepth(), false);
193
194	82	$maxLayerLength = max(array_map(static function (PackedLayer $layer) {
195	82	return $layer->getEndY();
196	82	}, $layers));
197	82	$layers[] = $this->layerPacker->packLayer($items, $this->getPackedItemList($layers), 0, $maxLayerLength, 0, $boxWidth, $boxLength, $this->box->getInnerDepth(), $this->box->getInnerDepth(), false);
198		}
199
200	82	$layers = $this->correctLayerRotation($layers, $boxWidth);
201
202	82	return new PackedBox($this->box, $this->getPackedItemList($layers));
203		}
204
205		/**
206		* During packing, it is quite possible that layers have been created that aren't physically stable
207		* i.e. they overhang the ones below.
208		*
209		* This function reorders them so that the ones with the greatest surface area are placed at the bottom
210		*
211		* @param PackedLayer[] $oldLayers
212		* @return PackedLayer[]
213		*/
214	82	private function stabiliseLayers(array $oldLayers): array
215		{
216	82	if ($this->hasConstrainedItems) { // constraints include position, so cannot change
217		return $oldLayers;
218		}
219
220	82	$stabiliser = new LayerStabiliser();
221
222	82	return $stabiliser->stabilise($oldLayers);
223		}
224
225		/**
226		* Swap back width/length of the packed items to match orientation of the box if needed.
227		*
228		* @param PackedLayer[] $oldLayers
229		*/
230	82	private function correctLayerRotation(array $oldLayers, int $boxWidth): array
231		{
232	82	if ($this->box->getInnerWidth() === $boxWidth) {
233	82	return $oldLayers;
234		}
235
236		$newLayers = [];
237		foreach ($oldLayers as $originalLayer) {
238		$newLayer = new PackedLayer();
239		foreach ($originalLayer->getItems() as $item) {
240		$packedItem = new PackedItem($item->getItem(), $item->getY(), $item->getX(), $item->getZ(), $item->getLength(), $item->getWidth(), $item->getDepth());
241		$newLayer->insert($packedItem);
242		}
243		$newLayers[] = $newLayer;
244		}
245
246		return $newLayers;
247		}
248
249		/**
250		* Generate a single list of items packed.
251		* @param PackedLayer[] $layers
252		*/
253	82	private function getPackedItemList(array $layers): PackedItemList
254		{
255	82	$packedItemList = new PackedItemList();
256	82	foreach ($layers as $layer) {
257	82	foreach ($layer->getItems() as $packedItem) {
258	82	$packedItemList->insert($packedItem);
259		}
260		}
261
262	82	return $packedItemList;
263		}
264
265		/**
266		* Return the current packed depth.
267		*
268		* @param PackedLayer[] $layers
269		*/
270	82	private static function getCurrentPackedDepth(array $layers): int
271		{
272	82	$depth = 0;
273	82	foreach ($layers as $layer) {
274	54	$depth += $layer->getDepth();
275		}
276
277	82	return $depth;
278		}
279		}
280

dvdoug / BoxPacker

Push — 3.x ( 05eab4...5fb647 )

VolumePacker::setSinglePassMode() A

Complexity

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Duplication

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