package dynamics 

{

	import math.Vec2;

	

	/**

	 * ...

	 * @author Peter Mackay

	 */

	internal final class Derivative

	{

		

		internal var velocity:Vec2;

		internal var acceleration:Vec2;

		

		public function Derivative(velocity:Vec2, acceleration:Vec2) 

		{

			this.velocity = velocity;

			this.acceleration = acceleration;

		}

		

		public function add(other:Derivative):Derivative

		{

			return new Derivative(velocity.add(other.velocity), acceleration.add(other.acceleration));

		}

		

		public function mul(dt:Number):Derivative

		{

			return new Derivative(velocity.mul(dt), acceleration.mul(dt));

		}

	}



}