duck

private var draggedObject : Draggable;

function Update ()
{
    if (iPhoneInput.touchCount >= 1)
    {
        touch = iPhoneInput.touch[0];

        if (touch.phase == iPhoneTouchPhase.Began)
        {
            // determine whether a draggable object was touched,
            // if so, put it in "draggedObject"
        }

        if (touch.phase == iPhoneTouchPhase.Moved && detectingMotion == true)
        {
            // if currently dragging an object, send the current point to the object
            // (so the object adds it to its own internal array of points to move through)

        }

        if (touch.phase == iPhoneTouchPhase.Ended)
        {
            draggedObject = null;
        }
    }

}