public class Acceleration {
	private double mass;
	private Pair<Double> force;
	private Velocity velocity;
	private Onground onground;
	private Pair<Double> acceleration;

	public void updateMass(double mass) {
		this.mass = mass;
		acceleration = (this.onground.getOnground() ? new Pair<>((force.getX() / mass), 0.0)
				: new Pair<>((force.getX() / mass), (force.getY() / mass)));
		velocity.updateAcceleration(acceleration);
	}

	public void updateForce(Pair<Double> force) {
		this.force = force;
		acceleration = (this.onground.getOnground() ? new Pair<>((force.getX() / mass), 0.0)
				: new Pair<>((force.getX() / mass), (force.getY() / mass)));
		velocity.updateAcceleration(acceleration);
	}

	public Acceleration(Velocity velocity, Onground onground) {
		this.velocity = velocity;
		this.onground = onground;
	}

	public Pair<Double> getAcceleration() {
		return acceleration;
	}
}