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<?php |
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declare(strict_types=1); |
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namespace Location; |
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use Location\Bearing\BearingInterface; |
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use Location\Distance\DistanceInterface; |
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use Location\Utility\Cartesian; |
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/** |
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* Line Implementation |
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* |
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* @author Marcus Jaschen <[email protected]> |
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*/ |
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class Line implements GeometryInterface |
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{ |
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use GetBoundsTrait; |
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/** |
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* @var Coordinate |
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*/ |
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protected $point1; |
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/** |
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* @var Coordinate |
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*/ |
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protected $point2; |
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/** |
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* @param Coordinate $point1 |
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* @param Coordinate $point2 |
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*/ |
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public function __construct(Coordinate $point1, Coordinate $point2) |
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{ |
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$this->point1 = $point1; |
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$this->point2 = $point2; |
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} |
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/** |
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* @param Coordinate $point1 |
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* |
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* @return void |
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*/ |
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public function setPoint1(Coordinate $point1) |
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{ |
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$this->point1 = $point1; |
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} |
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/** |
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* @return Coordinate |
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*/ |
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public function getPoint1(): Coordinate |
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{ |
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return $this->point1; |
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} |
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/** |
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* @param Coordinate $point2 |
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* |
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* @return void |
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*/ |
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public function setPoint2(Coordinate $point2) |
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{ |
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$this->point2 = $point2; |
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} |
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/** |
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* @return Coordinate |
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*/ |
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public function getPoint2(): Coordinate |
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{ |
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return $this->point2; |
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} |
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/** |
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* Returns an array containing the two points. |
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* |
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* @return Coordinate[] |
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*/ |
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public function getPoints(): array |
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{ |
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return [$this->point1, $this->point2]; |
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} |
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/** |
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* Calculates the length of the line (distance between the two |
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* coordinates). |
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* |
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* @param DistanceInterface $calculator instance of distance calculation class |
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* |
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* @return float |
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*/ |
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public function getLength(DistanceInterface $calculator): float |
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{ |
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return $calculator->getDistance($this->point1, $this->point2); |
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} |
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/** |
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* @param BearingInterface $bearingCalculator |
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* |
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* @return float |
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*/ |
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public function getBearing(BearingInterface $bearingCalculator): float |
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{ |
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return $bearingCalculator->calculateBearing($this->point1, $this->point2); |
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} |
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/** |
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* @param BearingInterface $bearingCalculator |
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* |
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* @return float |
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*/ |
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public function getFinalBearing(BearingInterface $bearingCalculator): float |
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{ |
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return $bearingCalculator->calculateFinalBearing($this->point1, $this->point2); |
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} |
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/** |
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* Create a new instance with reversed point order, i. e. reversed direction. |
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* |
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* @return Line |
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*/ |
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public function getReverse(): Line |
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{ |
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return new static($this->point2, $this->point1); |
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} |
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/** |
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* Get the midpoint of a Line segment |
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* |
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* @see http://www.movable-type.co.uk/scripts/latlong.html#midpoint |
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* |
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* @return Coordinate |
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*/ |
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public function getMidpoint() : Coordinate |
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{ |
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$lat1 = deg2rad($this->point1->getLat()); |
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$lng1 = deg2rad($this->point1->getLng()); |
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$lat2 = deg2rad($this->point2->getLat()); |
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$lng2 = deg2rad($this->point2->getLng()); |
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$deltaLng = $lng2 - $lng1; |
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$A = new Cartesian(cos($lat1), 0, sin($lat1)); |
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$B = new Cartesian(cos($lat2) * cos($deltaLng), cos($lat2) * sin($deltaLng), sin($lat2)); |
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$C = $A->add($B); |
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$latMid = atan2($C->getZ(), sqrt($C->getX() ** 2 + $C->getY() ** 2)); |
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$lngMid = $lng1 + atan2($C->getY(), $C->getX()); |
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return new Coordinate(rad2deg($latMid), rad2deg($lngMid)); |
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} |
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} |
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mjaschen /
phpgeo
