(self)
return fit_affine_transformation(physical_frame, self.reference_frame)
Return the function that map the physical domain to the reference
        domain.

        :rtype: callable
Return the function that map the physical domain to the reference
        domain.
Return the function that map the physical domain to the reference domain .
def psi(self):
        """
        Return the function that map the physical domain to the reference
        domain.

        :rtype: callable
        """
        physical_frame = self.position_vertices - self.box_origin
        return fit_affine_transformation(physical_frame, self.reference_frame)
def psi ( self ) : physical_frame = self . position_vertices - self . box_origin return fit_affine_transformation ( physical_frame , self . reference_frame )