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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\Distance\DistanceInterface; |
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use Location\Formatter\Polyline\FormatterInterface; |
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/** |
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* Polyline Implementation |
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* |
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* @author Marcus Jaschen <[email protected]> |
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*/ |
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class Polyline 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 $points = []; |
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/** |
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* @param Coordinate $point |
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* |
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* @return void |
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*/ |
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public function addPoint(Coordinate $point) |
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{ |
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$this->points[] = $point; |
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} |
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/** |
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* Add unique point |
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* |
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* @param Coordinate $pointToAdd |
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* |
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* @return void |
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*/ |
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public function addUniquePoint(Coordinate $pointToAdd) |
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{ |
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foreach($this->points as $point) { |
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/* @var $point Coordinate */ |
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if(($pointToAdd->getLat() == $point->getLat()) && ($pointToAdd->getLng() == $point->getLng())) { |
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return; |
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} |
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} |
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$this->points[] = $pointToAdd; |
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} |
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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 $this->points; |
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} |
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/** |
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* @return int |
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*/ |
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public function getNumberOfPoints(): int |
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{ |
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return count($this->points); |
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} |
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/** |
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* @param FormatterInterface $formatter |
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* |
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* @return string |
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*/ |
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public function format(FormatterInterface $formatter): string |
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{ |
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return $formatter->format($this); |
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} |
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/** |
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* @return Line[] |
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*/ |
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public function getSegments(): array |
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{ |
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$length = count($this->points); |
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$segments = []; |
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if ($length <= 1) { |
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return $segments; |
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} |
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for ($i = 1; $i < $length; $i++) { |
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$segments[] = new Line($this->points[$i - 1], $this->points[$i]); |
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} |
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return $segments; |
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} |
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/** |
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* Calculates the length of the polyline. |
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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 $calculator): float |
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{ |
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$distance = 0.0; |
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if (count($this->points) <= 1) { |
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return $distance; |
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} |
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foreach ($this->getSegments() as $segment) { |
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$distance += $segment->getLength($calculator); |
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} |
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return $distance; |
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} |
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/** |
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* Create a new polyline with reversed order of points, i. e. reversed |
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* polyline direction. |
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* |
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* @return Polyline |
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*/ |
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public function getReverse(): Polyline |
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{ |
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$reversed = new static(); |
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foreach (array_reverse($this->points) as $point) { |
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$reversed->addPoint($point); |
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} |
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return $reversed; |
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} |
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/** |
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* @return Coordinate|null |
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*/ |
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public function getMiddlePoint(): ?Coordinate |
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{ |
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$lat = 0.0; |
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$lng = 0.0; |
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$numberOfPoints = count($this->points); |
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if($numberOfPoints < 1) { |
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return null; |
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} |
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foreach($this->points as $point) { |
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/* @var $point Coordinate */ |
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$lat += $point->getLat(); |
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$lng += $point->getLng(); |
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} |
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$lat /= $numberOfPoints; |
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$lng /= $numberOfPoints; |
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return new Coordinate($lat, $lng); |
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} |
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} |
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mjaschen /
phpgeo
