def test_volume_conversion():
"""tests conversion of volume and radius of droplet"""
for dim in [1, 2, 3]:
radius = 1 + random.random()
volume = spherical.volume_from_radius(radius, dim=dim)
radius2 = spherical.radius_from_volume(volume, dim=dim)
assert radius2 == pytest.approx(radius)
def from_volume(cls, position: np.ndarray, volume: float):
"""Construct a droplet from given volume instead of radius
Args:
position (:class:`~numpy.ndarray`): center of the droplet
volume (float): volume of the droplet
interface_width (float, optional): width of the interface
"""
dim = len(np.array(position, np.double, ndmin=1))
radius = spherical.radius_from_volume(volume, dim)
return cls(position, radius)
def volume(self, volume: float):
"""set the radius from a supplied volume"""
self.radius = spherical.radius_from_volume(volume, self.dim)