/**
* Creates a new Cartesian vector instance
*
* @param Frame $frame Reference frame
* @param Epoch|AstroDate $epoch Observation epoch
* @param Distance $x x position
* @param Distance $y y position
* @param Distance $z z position
* @param Velocity $vx x velocity
* @param Velocity $vy y velocity
* @param Velocity $vz z velocity
*/
public function __construct(Frame $frame, $epoch, Distance $x, Distance $y, Distance $z, Velocity $vx = null, Velocity $vy = null, Velocity $vz = null)
{
// Set reference frame and observation epoch
$this->frame = $frame;
$this->epoch = $epoch instanceof Epoch ? $epoch : $epoch->toEpoch();
// Set position components
$this->x = $x;
$this->y = $y;
$this->z = $z;
// Set velocity components
$this->vx = $vx;
$this->vy = $vy;
$this->vz = $vz;
// Set default rounding and units
$this->decimalPlaces = 13;
}
/**
* @covers Marando\AstroDate\AstroDate::toEpoch
*/
public function testToEpoch()
{
$dt = new AstroDate(2000, 1, 1, 12, 0, 0, null, TimeScale::TT());
$this->assertEquals((string) Epoch::J2000(), (string) $dt->toEpoch());
}
