public PositionInterpolator2D(IRenderPositionable2D target, vec2 start, vec2 end, EaseTypes easeType,
                                      float duration = 0, bool isRepeatable = true) : base(start, end, duration, easeType, isRepeatable)
        {
            Debug.Assert(target != null, NullMessage);

            renderTarget = target;
        }
 public PositionInterpolator2D(IRenderPositionable2D target, EaseTypes easeType, bool isRepeatable = true) :
     this(target, vec2.Zero, vec2.Zero, easeType, 0, isRepeatable)
 {
 }