74 lines
1.6 KiB
PHP
74 lines
1.6 KiB
PHP
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<?php
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declare(strict_types = 1);
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namespace DASPRiD\EnumTest;
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use DASPRiD\Enum\AbstractEnum;
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/**
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* @method static self MERCURY()
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* @method static self VENUS()
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* @method static self EARTH()
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* @method static self MARS()
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* @method static self JUPITER()
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* @method static self SATURN()
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* @method static self URANUS()
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* @method static self NEPTUNE()
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*/
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final class Planet extends AbstractEnum
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{
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protected const MERCURY = [3.303e+23, 2.4397e6];
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protected const VENUS = [4.869e+24, 6.0518e6];
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protected const EARTH = [5.976e+24, 6.37814e6];
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protected const MARS = [6.421e+23, 3.3972e6];
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protected const JUPITER = [1.9e+27, 7.1492e7];
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protected const SATURN = [5.688e+26, 6.0268e7];
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protected const URANUS = [8.686e+25, 2.5559e7];
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protected const NEPTUNE = [1.024e+26, 2.4746e7];
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/**
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* Universal gravitational constant.
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*/
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private const G = 6.67300E-11;
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/**
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* Mass in kilograms.
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*
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* @var float
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*/
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private $mass;
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/**
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* Radius in meters.
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*
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* @var float
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*/
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private $radius;
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protected function __construct(float $mass, float $radius)
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{
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$this->mass = $mass;
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$this->radius = $radius;
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}
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public function mass() : float
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{
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return $this->mass;
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}
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public function radius() : float
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{
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return $this->radius;
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}
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public function surfaceGravity() : float
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{
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return self::G * $this->mass / ($this->radius * $this->radius);
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}
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public function surfaceWeight(float $otherMass) : float
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{
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return $otherMass * $this->surfaceGravity();
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}
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}
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