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<?php declare(strict_types=1);
namespace Stratadox\Pathfinder\Distance;
use function sqrt;
use Stratadox\Pathfinder\Metric;
use Stratadox\Pathfinder\Position;
final class Euclidean implements Metric
{
private $dimensions;
public function __construct(int $dimensions)
$this->dimensions = $dimensions;
}
public static function distance(): Metric
return new self(2);
public static function inDimensions(int $amount): Metric
return new self($amount);
public function distanceBetween(Position $start, Position $goal): float
$sum = 0;
for ($i = $this->dimensions - 1; $i >= 0; --$i) {
$sum += ($start[$i] - $goal[$i]) ** 2;
return sqrt($sum);
Stratadox /
Pathfinder
