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<?php |
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declare(strict_types=1); |
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namespace Ivory\Value; |
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use Ivory\Utils\IEqualable; |
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/** |
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* Representation of a point on a plane. |
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* |
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* The objects are immutable. |
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*/ |
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class Point implements IEqualable |
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{ |
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private $x; |
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private $y; |
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/** |
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* Creates a new point from its X- and Y-coordinates, either specified as two arguments or as a two-item array. |
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* |
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* @param float|float[] $x |
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* @param float|null $y |
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* @return Point |
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*/ |
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public static function fromCoords($x, $y = null): Point |
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{ |
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if ($y === null && is_array($x) && count($x) == 2) { |
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$y = $x[1]; |
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$x = $x[0]; |
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} |
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if (!is_numeric($x)) { |
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throw new \InvalidArgumentException('x'); |
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} |
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if (!is_numeric($y)) { |
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throw new \InvalidArgumentException('y'); |
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} |
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return new Point((float)$x, (float)$y); |
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} |
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private function __construct(float $x, float $y) |
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{ |
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$this->x = $x; |
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$this->y = $y; |
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} |
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/** |
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* @return float the X-coordinate of the point |
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*/ |
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public function getX(): float |
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{ |
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return $this->x; |
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} |
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/** |
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* @return float the Y-coordinate of the point |
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*/ |
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public function getY(): float |
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{ |
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return $this->y; |
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} |
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/** |
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* @return float[] pair of the X- and Y-coordinate of the point |
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*/ |
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public function toCoords(): array |
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{ |
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return [$this->x, $this->y]; |
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} |
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public function __toString() |
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{ |
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return "({$this->x},{$this->y})"; |
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} |
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/** |
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* @param object $object |
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* @return bool|null <tt>true</tt> if <tt>$this</tt> and the other <tt>$object</tt> are equal to each other, |
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* <tt>false</tt> if they are not equal, |
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* <tt>null</tt> iff <tt>$object</tt> is <tt>null</tt> |
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*/ |
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public function equals($object): ?bool |
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{ |
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if ($object === null) { |
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return null; |
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} |
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if (!$object instanceof Point) { |
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return false; |
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} |
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return ( |
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$this->getX() == $object->getX() |
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&& |
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$this->getY() == $object->getY() |
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); |
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} |
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} |
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ondrej-bouda /
ivory
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