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<?php |
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namespace Samsara\Fermat\Coordinates\Values; |
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use Samsara\Fermat\Core\Numbers; |
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use Samsara\Fermat\Coordinates\Types\Base\Interfaces\Coordinates\CoordinateInterface; |
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use Samsara\Fermat\Coordinates\Types\Base\Interfaces\Coordinates\TwoDCoordinateInterface; |
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use Samsara\Fermat\Coordinates\Types\Coordinate; |
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use Samsara\Fermat\Core\Values\ImmutableDecimal; |
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class PolarCoordinate extends Coordinate implements TwoDCoordinateInterface |
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{ |
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/** @var CartesianCoordinate */ |
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protected $cachedCartesian; |
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public function __construct($rho, $theta) |
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{ |
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$theta = Numbers::makeOrDont(Numbers::IMMUTABLE, $theta); |
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$theta = $theta->continuousModulo(Numbers::makeTau($theta->getScale())); |
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if ($theta->isNegative()) { |
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$theta = Numbers::makeTau($theta->getScale())->add($theta); |
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} |
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$data = [ |
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'rho' => $rho, |
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'theta' => $theta |
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]; |
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parent::__construct($data); |
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} |
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public function getDistanceFromOrigin(): ImmutableDecimal |
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{ |
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return $this->getAxis('rho'); |
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} |
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public function distanceTo(CoordinateInterface $coordinate): ImmutableDecimal |
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{ |
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return $this->asCartesian()->distanceTo($coordinate); |
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} |
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public function asCartesian(?int $scale = null): CartesianCoordinate |
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{ |
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$scale = $scale ?? 10; |
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$intScale = $scale + 2; |
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if (is_null($this->cachedCartesian)) { |
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$x = $this->getAxis('rho')->multiply($this->getAxis('theta')->cos($intScale))->roundToScale($scale); |
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$y = $this->getAxis('rho')->multiply($this->getAxis('theta')->sin($intScale))->roundToScale($scale); |
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$this->cachedCartesian = new CartesianCoordinate($x, $y); |
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} |
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return $this->cachedCartesian; |
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} |
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public function getPolarAngle(): ImmutableDecimal |
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{ |
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return $this->getAxis('theta'); |
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} |
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public function asPolar(): PolarCoordinate |
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{ |
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return $this; |
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} |
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} |
JordanRL /
Fermat
