|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace GGGGino\WarehousePath\Breadcrumb; |
|
4
|
|
|
|
|
5
|
|
|
use GGGGino\WarehousePath\Entity\Place; |
|
6
|
|
|
|
|
7
|
|
|
class BreadthFirstBreadcrumb implements BreadcrumbInterface |
|
8
|
|
|
{ |
|
9
|
|
|
/** |
|
10
|
|
|
* Main algorithm to find the shortest path. |
|
11
|
|
|
* |
|
12
|
|
|
* @todo: nel futuro quando ci sarà un magazzino grande, spezzare il magazzino prendendo solo il quadrato contenente i vari punti |
|
13
|
|
|
* @todo: permettere la modifica al volo del peso delle locazioni |
|
14
|
|
|
* |
|
15
|
|
|
* @param Place $startPlace |
|
16
|
|
|
* @param Place $endPlace if not null do early exit |
|
17
|
|
|
*/ |
|
18
|
|
|
public function createBreadcrumb(Place $startPlace, Place $endPlace = null) |
|
19
|
|
|
{ |
|
20
|
|
|
$frontier = array(); |
|
21
|
|
|
array_push($frontier, $startPlace); |
|
22
|
|
|
|
|
23
|
|
|
while (!empty($frontier)) { |
|
24
|
|
|
/** @var Place $current */ |
|
25
|
|
|
$current = array_shift($frontier); |
|
26
|
|
|
|
|
27
|
|
|
/** @var Place $vicino */ |
|
28
|
|
|
foreach ($current->getWalkableNeighbors() as $vicino) { |
|
29
|
|
|
$tempCost = $current->getCurrentWeight() + $vicino->getOriginalWeight(); |
|
30
|
|
|
|
|
31
|
|
|
if ($vicino->isVisited() && $tempCost < $vicino->getCurrentWeight()) { |
|
32
|
|
|
$vicino->setCurrentWeight($tempCost); |
|
33
|
|
|
$vicino->setWalkingCameFrom($current); |
|
34
|
|
|
array_push($frontier, $vicino); |
|
35
|
|
|
continue; |
|
36
|
|
|
} |
|
37
|
|
|
|
|
38
|
|
|
if ($vicino->isVisited()) { |
|
39
|
|
|
continue; |
|
40
|
|
|
} |
|
41
|
|
|
|
|
42
|
|
|
$vicino->setVisited(true); |
|
43
|
|
|
|
|
44
|
|
|
$vicino->increaseCurrentWeight($current->getCurrentWeight()); |
|
45
|
|
|
$vicino->setWalkingCameFrom($current); |
|
46
|
|
|
|
|
47
|
|
|
array_push($frontier, $vicino); |
|
48
|
|
|
} |
|
49
|
|
|
|
|
50
|
|
|
$current->setVisited(true); |
|
51
|
|
|
} |
|
52
|
|
|
} |
|
53
|
|
|
} |
GGGGino /
WarehousePath
