I have a widget with a label and counting the distance to the character, there is also a spline along which the pointer sprite moves. I want to associate the beginning of the spline with the character (so that the beginning of the spline is always where the character is), and the end with the widget label (so that by dragging the widget, the end point of the spline is dragged). How do I implement this? I want to do something like a navigator.