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

Input parameters:

1. Sh → Optional shape to transform.
2. St → The four vertices of the tetrahedron representing the initial state.
3. Tt → The four vertices of the tetrahedron representing the final state.

Output parameters:

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