Transform a shape using source and target reference rectangles. The specifics of the transformation are encoded by the differences between the rectangles.

Input parameters:

1. Sh → Optional shape to transform.
2. Sr → Rectangle representing the initial state.
3. Tr → Rectangle representing the final state.

Output parameters:

1. Sh → Transformed shape.
2. Tr → Transformation consisting of the translation, dilation and rotation required to go from the source to the target rectangle.