public function testInvertValue()
{
$angleObject = new Angle(10, Angle::MINUTES);
$angleObject->setValue(10, Angle::DEGREES);
$angleObject->invertValue();
$angleValue = $angleObject->getValue(Angle::DEGREES);
$this->assertEquals(-10.0, $angleValue);
}
/**
* Get the destination for a given initial bearing and distance along a great circle route
*
* @param Angle $bearing Initial bearing
* @param Distance $distance Distance to travel along the route
* @param ReferenceEllipsoid $ellipsoid If left blank, a default value of 6371009.0 metres will
* be used for the Earth Mean Radius for the calculation;
* If a reference ellipsoid is specified, the Authalic Radius for
* that ellipsoid will be used.
* @return LatLong The endpoint Lat/Long for a journey from this Lat/Long starting on a bearing
* of $bearing and travelling for $distance along a great circle route
* @throws Exception
*/
public function getDestination(Angle $bearing, Distance $distance, ReferenceEllipsoid $ellipsoid = null)
{
if (!is_null($ellipsoid)) {
$earthMeanRadius = $ellipsoid->getAuthalicRadius();
} else {
$earthMeanRadius = 6371009.0;
// metres
}
$destinationLatitude = asin(sin($this->latitude->getValue(Angle::RADIANS)) * cos($distance->getValue() / $earthMeanRadius) + cos($this->latitude->getValue(Angle::RADIANS)) * sin($distance->getValue() / $earthMeanRadius) * cos($bearing->getValue(Angle::RADIANS)));
$destinationLongitude = $this->longitude->getValue(Angle::RADIANS) + atan2(sin($bearing->getValue(Angle::RADIANS)) * sin($distance->getValue() / $earthMeanRadius) * cos($this->latitude->getValue(Angle::RADIANS)), cos($distance->getValue() / $earthMeanRadius) - sin($this->latitude->getValue(Angle::RADIANS)) * sin($destinationLatitude));
return new LatLong(new LatLong\CoordinateValues(self::cleanLatitude($destinationLatitude), self::cleanLongitude($destinationLongitude), Angle::RADIANS));
}
