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<?php |
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namespace geoPHP\Geometry; |
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use geoPHP\Exception\InvalidGeometryException; |
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use geoPHP\geoPHP; |
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/** |
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* Collection: Abstract class for compound geometries |
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* |
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* A geometry is a collection if it is made up of other component geometries. Therefore everything except a Point |
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* is a Collection. For example a LingString is a collection of Points. A Polygon is a collection of LineStrings etc. |
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* |
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* @package GeoPHPGeometry |
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*/ |
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abstract class Collection extends Geometry |
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{ |
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/** |
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* @var Geometry[]|Collection[] |
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*/ |
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protected $components = []; |
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/** |
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* @var bool True if Geometry has Z (altitude) value |
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*/ |
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protected $hasZ = false; |
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/** |
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* @var bool True if Geometry has M (measure) value |
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*/ |
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protected $isMeasured = false; |
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/** |
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* Constructor: Checks and sets component geometries |
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* |
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* @param Geometry[] $components array of geometries |
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* @param bool $allowEmptyComponents Allow creating geometries with empty components. Default false. |
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* @param string $allowedComponentType A class-type the components have to be instance of. |
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* @throws InvalidGeometryException |
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*/ |
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public function __construct( |
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array $components = [], |
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bool $allowEmptyComponents = false, |
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string $allowedComponentType = Geometry::class |
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) { |
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$componentCount = count($components); |
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for ($i = 0; $i < $componentCount; ++$i) { |
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if ($components[$i] instanceof $allowedComponentType) { |
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if (!$allowEmptyComponents && $components[$i]->isEmpty()) { |
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throw new InvalidGeometryException( |
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'Cannot create a collection of empty ' . |
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$components[$i]->geometryType() . 's (' . ($i + 1) . '. component)' |
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); |
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} |
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if ($components[$i]->hasZ() && !$this->hasZ) { |
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$this->hasZ = true; |
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} |
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if ($components[$i]->isMeasured() && !$this->isMeasured) { |
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$this->isMeasured = true; |
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} |
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} else { |
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$componentType = gettype($components[$i]) !== 'object' ? |
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gettype($components[$i]) : |
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get_class($components[$i]); |
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throw new InvalidGeometryException( |
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'Cannot create a collection of ' . $componentType . ' components, ' . |
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'expected type is ' . $allowedComponentType |
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); |
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} |
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} |
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$this->components = $components; |
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} |
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/** |
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* Returns Collection component geometries |
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* |
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* @return Geometry[] |
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*/ |
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public function getComponents(): array |
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{ |
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return $this->components; |
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} |
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/** |
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* Inverts x and y coordinates |
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* Useful for old data still using lng lat |
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* |
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* @return self |
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* */ |
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public function invertXY(): self |
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{ |
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foreach ($this->components as $component) { |
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$component->invertXY(); |
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} |
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$this->setGeos(null); |
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return $this; |
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} |
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/** |
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* @return array{'minx'?:float|null, 'miny'?:float|null, 'maxx'?:float|null, 'maxy'?:float|null} |
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*/ |
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public function getBBox(): array |
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{ |
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if ($this->isEmpty()) { |
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return []; |
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} |
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$geosObj = $this->getGeos(); |
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if (is_object($geosObj)) { |
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// @codeCoverageIgnoreStart |
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/** @noinspection PhpUndefinedMethodInspection */ |
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$envelope = $geosObj->envelope(); |
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/** @noinspection PhpUndefinedMethodInspection */ |
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if ($envelope->typeName() === 'Point') { |
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return geoPHP::geosToGeometry($envelope)->getBBox(); |
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} |
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/** @noinspection PhpUndefinedMethodInspection */ |
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$geosRing = $envelope->exteriorRing(); |
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/** @noinspection PhpUndefinedMethodInspection */ |
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return [ |
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'maxy' => $geosRing->pointN(3)->getY(), |
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'miny' => $geosRing->pointN(1)->getY(), |
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'maxx' => $geosRing->pointN(1)->getX(), |
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'minx' => $geosRing->pointN(3)->getX(), |
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]; |
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// @codeCoverageIgnoreEnd |
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} |
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// Go through each component and get the max and min x and y |
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$maxX = $maxY = $minX = $minY = 0; |
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foreach ($this->components as $i => $component) { |
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$componentBoundingBox = $component->getBBox(); |
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if (empty($componentBoundingBox)) { |
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continue; |
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} |
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// On the first run through, set the bounding box to the component's bounding box |
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if ($i === 0) { |
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$maxX = $componentBoundingBox['maxx']; |
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$maxY = $componentBoundingBox['maxy']; |
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$minX = $componentBoundingBox['minx']; |
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$minY = $componentBoundingBox['miny']; |
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} |
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// Do a check and replace on each boundary, slowly growing the bounding box |
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$maxX = $componentBoundingBox['maxx'] > $maxX ? $componentBoundingBox['maxx'] : $maxX; |
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$maxY = $componentBoundingBox['maxy'] > $maxY ? $componentBoundingBox['maxy'] : $maxY; |
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$minX = $componentBoundingBox['minx'] < $minX ? $componentBoundingBox['minx'] : $minX; |
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$minY = $componentBoundingBox['miny'] < $minY ? $componentBoundingBox['miny'] : $minY; |
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} |
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return [ |
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'maxy' => $maxY, |
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'miny' => $minY, |
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'maxx' => $maxX, |
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'minx' => $minX, |
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]; |
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} |
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/** |
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* check if Geometry has a measure value |
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* |
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* @return bool true if collection has measure values |
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*/ |
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public function isMeasured(): bool |
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{ |
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return $this->isMeasured; |
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} |
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/** |
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* check if Geometry has Z (altitude) coordinate |
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* |
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* @return bool true if geometry has a Z-value |
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*/ |
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public function hasZ(): bool |
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{ |
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return $this->hasZ; |
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} |
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/** |
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* Returns every sub-geometry as a multidimensional array |
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* |
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* @return array<int, array> |
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*/ |
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public function asArray(): array |
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{ |
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$array = []; |
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foreach ($this->components as $component) { |
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$array[] = $component->asArray(); |
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} |
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return $array; |
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} |
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/** |
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* @return int |
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*/ |
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public function numGeometries(): int |
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{ |
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return count($this->components); |
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} |
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/** |
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* Returns the 1-based Nth geometry. |
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* |
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* @param int $n 1-based geometry number |
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* @return Geometry|null |
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*/ |
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public function geometryN(int $n) |
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{ |
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return isset($this->components[$n - 1]) ? $this->components[$n - 1] : null; |
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} |
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/** |
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* A collection is not empty if it has at least one non empty component. |
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* |
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* @return bool |
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*/ |
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public function isEmpty(): bool |
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{ |
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foreach ($this->components as $component) { |
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if (!$component->isEmpty()) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* @return int |
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*/ |
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public function numPoints(): int |
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{ |
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$num = 0; |
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foreach ($this->components as $component) { |
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$num += $component->numPoints(); |
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} |
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return $num; |
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} |
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/** |
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* @return Point[] |
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*/ |
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public function getPoints(): array |
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{ |
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$points = []; |
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// Same as array_merge($points, $component->getPoints()), but 500× faster |
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static::getPointsRecursive($this, $points); |
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return $points; |
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} |
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/** |
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* @param Collection $geometry The geometry from which points will be extracted |
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* @param Point[] $points Result array as reference |
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* @return void |
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*/ |
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private static function getPointsRecursive(Geometry $geometry, array &$points) |
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{ |
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foreach ($geometry->components as $component) { |
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if ($component instanceof Point) { |
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$points[] = $component; |
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} else { |
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/** @var Collection $component */ |
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static::getPointsRecursive($component, $points); |
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} |
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} |
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} |
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/** |
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* @todo speed it up with array_diff |
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* @param Geometry $geometry |
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* @return bool |
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*/ |
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public function equals(Geometry $geometry): bool |
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{ |
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$geosObj = $this->getGeos(); |
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if (is_object($geosObj)) { |
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// @codeCoverageIgnoreStart |
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/** @noinspection PhpUndefinedMethodInspection */ |
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$geosObj2 = $geometry->getGeos(); |
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return is_object($geosObj2) ? $geosObj->equals($geosObj2) : false; |
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// @codeCoverageIgnoreEnd |
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} |
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// To test for equality we check to make sure that there is a matching point |
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// in the other geometry for every point in this geometry. |
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// This is slightly more strict than the standard, which |
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// uses Within(A,B) = true and Within(B,A) = true |
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// @@TODO: Eventually we could fix this by using some sort of simplification |
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// method that strips redundant vertices (that are all in a row) |
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$thisPoints = $this->getPoints(); |
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$otherPoints = $geometry->getPoints(); |
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// First do a check to make sure they have the same number of vertices |
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if (count($thisPoints) !== count($otherPoints)) { |
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return false; |
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} |
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foreach ($thisPoints as $point) { |
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$foundMatch = false; |
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foreach ($otherPoints as $key => $testPoint) { |
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if ($point->equals($testPoint)) { |
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$foundMatch = true; |
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unset($otherPoints[$key]); |
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break; |
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} |
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} |
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if (!$foundMatch) { |
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return false; |
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} |
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} |
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// All points match, return TRUE |
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return true; |
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} |
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/** |
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* Get all underlying components separated |
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* |
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* @param bool $toArray return underlying components as LineStrings/Points or as array of coordinate values. |
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* @return LineString[]|Point[]|array{}|array<array> |
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*/ |
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public function explode(bool $toArray = false): array |
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{ |
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$parts = []; |
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foreach ($this->getComponents() as $component) { |
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foreach ($component->explode($toArray) as $part) { |
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$parts[] = $part; |
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} |
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} |
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return $parts; |
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} |
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340
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/** |
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* @return void |
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*/ |
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public function flatten() |
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{ |
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if ($this->hasZ() || $this->isMeasured()) { |
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foreach ($this->getComponents() as $component) { |
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$component->flatten(); |
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} |
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$this->hasZ = false; |
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$this->isMeasured = false; |
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$this->setGeos(null); |
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} |
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} |
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/** |
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* @return float|null |
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*/ |
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public function distance(Geometry $geometry) |
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{ |
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$geosObj = $this->getGeos(); |
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if (is_object($geosObj)) { |
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// @codeCoverageIgnoreStart |
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/** @noinspection PhpUndefinedMethodInspection */ |
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$geosObj2 = $geometry->getGeos(); |
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return is_object($geosObj2) ? $geosObj->distance($geosObj2) : null; |
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// @codeCoverageIgnoreEnd |
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} |
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$distance = null; |
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foreach ($this->getComponents() as $component) { |
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$checkDistance = $component->distance($geometry); |
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if ($checkDistance === 0.0) { |
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return 0.0; |
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} |
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if ($checkDistance === null) { |
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continue; |
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} |
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$distance = ($distance ?? $checkDistance); |
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if ($checkDistance < $distance) { |
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$distance = $checkDistance; |
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} |
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} |
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|
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return $distance; |
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} |
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|
|
|
|
388
|
|
|
public function translate($dx = 0, $dy = 0, $dz = 0) |
389
|
|
|
{ |
390
|
|
|
foreach ($this->getComponents() as $component) { |
391
|
|
|
$component->translate($dx, $dy, $dz); |
392
|
|
|
} |
393
|
|
|
} |
394
|
|
|
} |
395
|
|
|
|