def save_volume_prop_to_grad(volume_prop, grad_file_name):
"""Save the given volume property (*volume_prop*) to a ``*.grad`` file
given as *grad_file_name*.
"""
gt = GradientTable(300)
gt.load_from_vtk_volume_prop(volume_prop)
gt.save(grad_file_name)
def load_volume_prop_from_grad(grad_file_name, volume_prop,
scalar_range=(0, 255)):
"""Load a ``*.grad`` file (*grad_file_name*) and set the given volume
property (*volume_prop*) given the *scalar_range*.
"""
gt = GradientTable(300)
gt.load(grad_file_name)
gt.store_to_vtk_volume_prop(volume_prop, scalar_range)