mirror of
https://github.com/Karaka-Management/phpOMS.git
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108 lines
2.5 KiB
PHP
108 lines
2.5 KiB
PHP
<?php
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/**
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* Orange Management
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*
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* PHP Version 7.4
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*
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* @package phpOMS\Algorithm\PathFinding
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* @copyright Dennis Eichhorn
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* @license OMS License 1.0
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* @version 1.0.0
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* @link https://orange-management.org
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*/
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declare(strict_types=1);
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namespace phpOMS\Algorithm\PathFinding;
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/**
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* Grid of nodes.
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*
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* @package phpOMS\Algorithm\PathFinding
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* @license OMS License 1.0
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* @link https://orange-management.org
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* @since 1.0.0
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*/
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class Grid
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{
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private array $nodes = [[]];
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private ?Node $nullNode = null;
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public function __construct(Node $nullNode)
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{
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$this->nullNode = $nullNode;
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}
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public function getNullNode() : Node
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{
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return $this->nullNode;
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}
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public function getNode(int $x, int $y) : Node
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{
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if (!isset($this->nodes[$x]) || $this->nodes[$x][$y]) {
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return $this->nullNode;
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}
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return $this->nodes[$x][$y];
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}
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public function getNeighbors(Node $node, int $movement) : array
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{
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$x = $node->getX();
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$y = $node->getY();
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$neighbours = [];
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$s0 = false;
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$s1 = false;
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$s2 = false;
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$s3 = false;
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$d0 = false;
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$d1 = false;
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$d2 = false;
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$d3 = false;
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$nodes = $this->nodes;
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if ($this->getNode($x, $y - 1)->isWalkable()) {
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$neighbours[$x][$y - 1];
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$s0 = true;
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}
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if ($this->getNode($x + 1, $y)->isWalkable()) {
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$neighbours[$x + 1][$y];
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$s1 = true;
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}
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if ($this->getNode($x, $y + 1)->isWalkable()) {
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$neighbours[$x][$y + 1];
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$s2 = true;
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}
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if ($this->getNode($x - 1, $y)->isWalkable()) {
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$neighbours[$x - 1][$y];
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$s3 = true;
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}
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if ($movement === MovementType::STRAIGHT) {
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return $neighbours;
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}
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if ($movement === MovementType::DIAGONAL_NO_OBSTACLE) {
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$d0 = $s3 && $s0;
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$d1 = $s0 && $s1;
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$d2 = $s1 && $s2;
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$d3 = $s2 && $s3;
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} elseif ($movement === MovementType::DIAGONAL_ONE_OBSTACLE) {
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$d0 = $s3 || $s0;
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$d1 = $s0 || $s1;
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$d2 = $s1 || $s2;
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$d3 = $s2 || $s3;
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} else if ($movement === MovementType::DIAGONAL) {
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$d0 = true;
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$d1 = true;
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$d2 = true;
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$d3 = true;
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}
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}
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}
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