def test_interface_reflection(self):
n = 10
points = g.Points(np.random.uniform(size=(n, 3)))
orientations = g.Points(np.eye(3), "coordinate system")
interface = c.Interface(
points,
orientations,
transmission_reflection="reflection",
kind="fluid_solid",
are_normals_on_inc_rays_side=True,
are_normals_on_out_rays_side=None,
reflection_against=water,
)
with pytest.raises(ValueError):
c.Interface(
points,
orientations,
transmission_reflection="reflection",
kind="fluid_solid",
are_normals_on_inc_rays_side=True,
are_normals_on_out_rays_side=None,
reflection_against=None,
)
assert interface.points is points
assert np.allclose(interface.orientations[np.newaxis, ...],
interface.orientations[...])
assert interface.transmission_reflection is c.TransmissionReflection.reflection
assert interface.reflection_against is water
str(interface)
repr(interface)
def make_case(self, are_normals_zplus):
"""
Source point: omega
Dest points: 12 points along a circle of centre omega and radius 5 (points are
spaced by 30°)
Parameters
----------
are_normals_zplus
Returns
-------
"""
omega = np.array((3.0, 0.0, 5.0)) * 1e-2
src_points = g.Points(omega.reshape([1, 3]), name="source")
src_basis = g.default_orientations(src_points)
src_basis = src_basis.rotate(g.rotation_matrix_y(np.pi / 6))
source_interface = arim.Interface(
src_points,
src_basis,
are_normals_on_out_rays_side=are_normals_zplus)
# circle:
dst_points = g.Points(np.zeros([len(self.circle_theta), 3]),
name="dest")
dst_points.x[...] = omega[0]
dst_points.y[...] = omega[1]
dst_points.z[...] = omega[2]
dst_points.x[...] += self.circle_radius * np.sin(self.circle_theta)
dst_points.z[...] += self.circle_radius * np.cos(self.circle_theta)
dst_basis = g.default_orientations(dst_points)
dest_interface = arim.Interface(
dst_points,
dst_basis,
are_normals_on_inc_rays_side=are_normals_zplus)
material = arim.Material(1.0, metadata=dict(long_name="Dummy"))
interfaces = [source_interface, dest_interface]
# The i-th ray starts from the source and ends at the i-th destination point.
shape = [len(source_interface.points), len(dest_interface.points)]
ray_indices = np.zeros((0, *shape), arim.settings.INT)
times = np.empty(shape, float)
times.fill(np.nan)
path = arim.Path(interfaces, [material], ["L"])
ray = arim.ray.Rays(times, ray_indices, path.to_fermat_path())
path.rays = ray
ray_geometry = arim.ray.RayGeometry.from_path(path)
return path, ray_geometry
def test_interface_probe(self):
n = 10
points = g.Points(np.random.uniform(size=(n, 3)))
orientations = g.Points(np.eye(3), "coordinate system")
interface = c.Interface(
points,
orientations,
are_normals_on_inc_rays_side=None,
are_normals_on_out_rays_side=True,
)
assert interface.points is points
assert np.allclose(interface.orientations[np.newaxis, ...],
interface.orientations[...])
str(interface)
repr(interface)
def test_find_probe_loc_from_frontwall_ideal(A, B, dA, dB):
"""Test move_probe_over_flat_surface() with 2 elements"""
A = np.asarray(A, dtype=np.float)
B = np.asarray(B, dtype=np.float)
# Setup: a 2-element points1
locations = g.Points(np.array([A, B])) # locations in PCS
probe = Probe(locations, 1e6) # NB: assume PCS=GCS at this point
tx = np.array([0, 0, 1])
rx = np.array([0, 1, 1])
distance_to_surface = np.array([dA, np.nan, dB])
time = Time(0.0, 1.0, 50)
scanlines = np.zeros((len(tx), len(time)))
frame = Frame(scanlines, time, tx, rx, probe,
ExaminationObject(Material(1.0)))
frame, iso = reg.move_probe_over_flat_surface(frame,
distance_to_surface,
full_output=True)
new_locations = frame.probe.locations
# Are the locations in PCS unchanged?
assert np.allclose(frame.probe.locations_pcs, locations)
# Right distance to the plane Oxy (NB: z<0):
assert np.isclose(new_locations.z[0], -dA)
assert np.isclose(new_locations.z[1], -dB)
# Elements are in plane y=0
assert np.isclose(new_locations.y[0], 0.0)
assert np.isclose(new_locations.y[1], 0.0)
# Is element A(0., 0., 0.) now in (0., 0., z)?
assert np.allclose(new_locations[0], (0.0, 0.0, iso.z_o))
# the elements are still in the right distance
dAB = g.norm2(*(locations[0] - locations[1]))
dApBp = g.norm2(*(new_locations[0] - new_locations[1]))
assert np.isclose(dAB, dApBp)
# Is the returned theta right?
# Remark: (dB-dB)/(xB-xA) has the sign of theta, then
# (zA-zB)/(xB-xA) has the sign of -theta because zA=-dA and zB=-dB
theta = -np.arctan((new_locations.z[1] - new_locations.z[0]) /
(new_locations.x[1] - new_locations.x[0]))
assert np.isclose(theta, iso.theta)
def make_delay_and_sum_case_random(dtype_float,
dtype_data,
amplitudes="random"):
locations = g.Points(
np.array([(0, 0, 0), (1.0, 0, 0), (2.0, 0.0, 0.0)], dtype=np.float))
numelements = len(locations)
frequency = 1e6
probe = Probe(locations, frequency)
# examination object:
vel = 10.0
material = Material(vel)
examination_object = ExaminationObject(material)
# timetraces
# time = Time(start=0.35, step=0.001, num=100)
time = Time(start=0.0, step=0.001, num=100)
tx = np.array([0, 0, 1, 1, 2, 2], dtype=np.int)
rx = np.array([0, 1, 0, 1, 0, 1], dtype=np.int)
numtimetraces = len(tx)
numpoints = 10
start_lookup = time.start / 2
stop_lookup = (time.end - time.step) / 2
np.random.seed(31031596)
timetraces = _random_uniform(dtype_data,
100.0,
101.0,
size=(numtimetraces, len(time)))
amplitudes_tx = _random_uniform(dtype_data,
1.0,
1.1,
size=(numpoints, numelements))
amplitudes_rx = _random_uniform(dtype_data,
-1.0,
-1.1,
size=(numpoints, numelements))
timetrace_weights = _random_uniform(dtype_data, size=(numtimetraces))
lookup_times_tx = _random_uniform(dtype_float, start_lookup, stop_lookup,
(numpoints, numelements))
lookup_times_rx = _random_uniform(dtype_float, start_lookup, stop_lookup,
(numpoints, numelements))
if amplitudes == "random":
amplitudes = arim.im.tfm.TxRxAmplitudes(amplitudes_tx, amplitudes_rx)
elif amplitudes == "uniform":
amplitudes = arim.im.tfm.TxRxAmplitudes(
np.ones((numpoints, numelements), dtype_data),
np.ones((numpoints, numelements), dtype_data),
)
elif amplitudes == "none":
amplitudes = None
else:
raise ValueError
# Mess a bit lookup times to get out of bounds values:
# lookup_times_tx[0, 0] = time.start / 2.
# lookup_times_rx[1, 1] = time.end * 2.
focal_law = arim.im.tfm.FocalLaw(lookup_times_tx, lookup_times_rx,
amplitudes, timetrace_weights)
frame = Frame(timetraces, time, tx, rx, probe, examination_object)
return frame, focal_law
