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<?php |
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namespace KDTree\ValueObject; |
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use KDTree\Exceptions\{InvalidDimensionsCount, InvalidPointProvided, UnknownDimension}; |
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use KDTree\Interfaces\PointInterface; |
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/** |
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* Class Point |
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* |
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* @package KDTree\ValueObject |
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*/ |
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final class Point implements PointInterface |
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{ |
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/** |
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* @var string |
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*/ |
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private $name = ''; |
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/** |
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* @var int |
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*/ |
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private $dimensions; |
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/** |
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* @var float[] |
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*/ |
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private $axises; |
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/** |
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* @param float ...$axises |
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* |
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* @throws InvalidDimensionsCount |
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*/ |
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public function __construct(float ...$axises) |
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{ |
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$dimensions = count($axises); |
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if ($dimensions < 1) { |
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throw new InvalidDimensionsCount(); |
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} |
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$this->dimensions = $dimensions; |
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$this->axises = $axises; |
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} |
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/** |
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* @return string |
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*/ |
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public function getName(): string |
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{ |
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return $this->name; |
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} |
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/** |
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* @param string $name |
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* |
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* @return PointInterface |
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*/ |
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public function setName(string $name): PointInterface |
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{ |
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$this->name = $name; |
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return $this; |
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} |
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/** |
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* @param PointInterface $point |
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* |
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* @return float |
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* @throws InvalidPointProvided |
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*/ |
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public function distance(PointInterface $point): float |
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{ |
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if ($point->getDimensions() !== $this->getDimensions()) { |
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throw new InvalidPointProvided(); |
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} |
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$result = array_reduce( |
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range(0, $this->dimensions - 1), |
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function (float $result, int $dimension) use ($point): float { |
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return $result + ($point->getDAxis($dimension) - $this->getDAxis($dimension)) ** 2; |
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}, |
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0.0 |
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); |
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return sqrt($result); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getDimensions(): int |
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{ |
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return $this->dimensions; |
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} |
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/** |
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* @param int $dimension |
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* |
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* @return float |
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* @throws UnknownDimension |
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*/ |
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public function getDAxis(int $dimension): float |
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{ |
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if (isset($this->axises[$dimension])) { |
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return $this->axises[$dimension]; |
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} |
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throw new UnknownDimension(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function equals(PointInterface $point): bool |
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{ |
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return $this->getAxises() === $point->getAxises(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getAxises(): array |
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{ |
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return $this->axises; |
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} |
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} |
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f1r3starter /
kdtree
