/**
* @param Coordinate $coordinate
* @param DistanceUnit $unit
*/
public function distance(Coordinate $coordinate, DistanceUnit $unit = null)
{
$latA = \deg2rad($this->latitude());
$lngA = \deg2rad($this->longitude());
$latB = \deg2rad($coordinate->latitude());
$lngB = \deg2rad($coordinate->longitude());
$degrees = \acos(\sin($latA) * \sin($latB) + \cos($latA) * \cos($latB) * \cos($lngB - $lngA));
$unit = $unit === null ? DistanceUnit::METER() : $unit;
return (new Distance(Real::fromNative($degrees * self::EARTH_RADIUS), DistanceUnit::METER()))->in($unit);
}
/**
* @param SelectorInterface $selector
* @param Coordinate $coordinate
* @param Distance $radius
*/
public function __construct(SelectorInterface $selector, Coordinate $coordinate, Distance $radius = null)
{
$this->selector = $selector;
$this->coordinate = $coordinate;
$this->radius = $radius === null ? new Distance(Real::fromNative(self::DEFAULT_RADIUS), DistanceUnit::METER()) : $radius;
}
