/**
* Constructor that generates the Black Hole.
*
* @param world The worldCollection in which it resides
* @param position Its initial position
* @param mass Its mass
* @param radius Its radius
*/
public BlackHole(WorldCollection world, Vector2D position, double mass, double radius) {
super(world, position, mass, radius);
gravity = Double.parseDouble(Config.get("Gravity_constant"));
}
