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