Transform a shape using source and target reference boxes. The specifics of the transformation are encoded by the differences between the boxes. If an input shape is provided, it will be transformed accordingly.

Input parameters:

1. Sh → Optional shape to transform.
2. Sb → Box representing the initial state.
3. Tb → Box 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 box.