def test_same_wall_false3D(self):
w1 = pra.wall_factory(
wall_corners_3D[0], absorptions_3D[:1], scatterings_3D[:1]
)
w2 = pra.wall_factory(
wall_corners_3D[1], absorptions_3D[:1], scatterings_3D[:1]
)
self.assertTrue(not w1.same_as(w2))
def test_same_wall_false3D_more_corners(self):
# Modification of wall_corners_3D[0]: adding a corner => 5 corners wall
c1 = np.array([[0, 3, 3, 1.5, 0], [0, 0, 0, 0, 0], [0, 0, 2, 1.5, 2]])
w1 = pra.wall_factory(wall_corners_3D[0], absorptions_3D[:1],
scatterings_3D[:1])
w2 = pra.wall_factory(c1, absorptions_3D[:1], scatterings_3D[:1])
self.assertTrue(not w1.same_as(w2))
def test_wall_3d_normal_0():
"""Tests direction of normal wrt to point arrangement"""
w_info = walls[0]
wall1 = pra.wall_factory(w_info["corners"], [0.2], [0.1])
# the same wall with normal pointing the other way
wall2 = pra.wall_factory(w_info["corners"][:, ::-1], [0.2], [0.1])
err = np.linalg.norm(wall1.normal + wall2.normal)
assert err < eps, "The error is {}".format(err)
def test_wall_3d_normal_1():
''' Tests direction of normal wrt to point arrangement '''
w_info = walls[1]
wall1 = pra.wall_factory(w_info['corners'], [0.2], [0.1])
# the same wall with normal pointing the other way
wall2 = pra.wall_factory(w_info['corners'][:, ::-1], [0.2], [0.1])
err = np.linalg.norm(wall1.normal + wall2.normal)
assert err < eps, 'The error is {}'.format(err)
def test_scat_ray_ok(self):
walls = [
pra.wall_factory(c, [a], [s]) for c, a, s in zip(
wall_corners_2D_non_convex, absorptions_2D, scatterings_2D)
]
obstructing_walls = [1, 2]
microphones = np.array([[0.5], [0.2]])
room = room_factory(walls, obstructing_walls, microphones)
room.set_params(
pra.constants.get("c"),
2, # order of ISM
0.001, # energy threshold for rays
200.0, # time threshold for rays
0.1, # detector radius
0.004, # histogram time resolution
True, # hybrid model
)
prev_wall = room.get_wall(0)
prev_last_hit = [2, 0.2]
last_hit = [0, 1.9]
total_dist = 0.0
energy = [1000000.0]
scatter_coef = scatterings_2D[0]
output = [[pra.libroom.Hit(1)]
] # arbitrary initialisation to have the correct shape
self.assertTrue(
room.scat_ray(energy, prev_wall, prev_last_hit, last_hit,
total_dist))
def test_max_dist_3D(self):
walls = [
pra.wall_factory(c, [a], [s])
for c, a, s in zip(wall_corners_3D, absorptions_3D, scatterings_2D)
]
obstructing_walls = []
microphones = np.array([
[
1,
],
[
1,
],
[
1,
],
])
room = room_factory(walls, obstructing_walls, microphones)
eps = 0.001
result = room.get_max_distance()
correct = np.sqrt(116) + 1
self.assertTrue(abs(result - correct) < eps)
def create_walls(obstacle_faces, materials):
"""Returns a list of Wall objects that can be used in the Room constructor
Args:
obstacle_faces (array/list of Nx3 numpy 2D matrices): Same as the output of make_polygon.
Each element of this is a 2D matrix representing a wall, each row is a coordinate
of a vertex.
material (pra.Material): Material of the wall
Returns:
list of Wall objects: Can be directly use in Room constructor
"""
material_list = False
if isinstance(materials, list):
if len(materials) != len(obstacle_faces):
raise TypeError(
"list of materials should be same length as obstacle_faces")
else:
material_list = True
elif not isinstance(materials, pra.Material):
raise TypeError(
"materials should be pra.Material or list of pra.Material")
walls = []
for i in range(len(obstacle_faces)):
m = materials[i] if material_list else materials
walls.append(
pra.wall_factory(obstacle_faces[i].T,
m.energy_absorption["coeffs"],
m.scattering["coeffs"]))
return walls
def test_reflected_end3D(self):
eps = 0.001
start = [1, 1, 1]
hit = [-1, 1, 3]
#normal = [1, 0, 0]
corners = np.array([
[
-1,
-1,
-1,
-1,
],
[
0,
2,
2,
0,
],
[
2,
2,
4,
4,
],
])
wall = pra.wall_factory(corners, [0.1], [0.1])
length = 2 * np.sqrt(2)
res = wall.normal_reflect(start, hit, length)
self.assertTrue(np.allclose(res, [1, 1, 5], atol=eps))
def test_wall_3d_area_1():
"""Tests the area computation"""
w_info = walls[1]
wall = pra.wall_factory(w_info["corners"], w_info["absorption"],
w_info["scattering"])
err = abs(wall.area() - w_info["area"])
assert err < 1, "The error is {}".format(err)
def test_wall_3d_area_1():
''' Tests the area computation '''
w_info = walls[1]
wall = pra.wall_factory(w_info['corners'], w_info['absorption'],
w_info['scattering'])
err = abs(wall.area() - w_info['area'])
assert err < 1, 'The error is {}'.format(err)
def test_next_wall_nohit(self):
walls = [
pra.wall_factory(c, [a], [s])
for c, a, s in zip(wall_corners_3D, absorptions_3D, scatterings_3D)
]
obstructing_walls = []
microphones = np.array([
[
1,
],
[
1,
],
[
1,
],
])
room = room_factory(walls, obstructing_walls, microphones)
eps = 0.001
# start outside the room
start = [-1, -1, -1]
# end outside the room
end = [-2, -3, -1]
ttuple = np.array(room.next_wall_hit(start, end, False))
self.assertTrue(ttuple[1] == -1)
def test_room_construct():
walls = [
pra.wall_factory(c, [a], [s])
for c, a, s in zip(wall_corners, absorptions, scatterings)
]
obstructing_walls = []
microphones = np.array([[1], [2], [1]])
room = pra.libroom.Room(
walls,
[],
[],
pra.constants.get("c"), # speed of sound
3,
1e-7, # energy_thres
1.0, # time_thres
0.5, # receiver_radius
0.004, # hist_bin_size
True, # a priori we will always use a hybrid model
)
print(room.max_dist)
return room
def run_side(label):
p = points[label]['p']
r_exp = points[label]['expect']
d = points[label]['d']
wall = pra.wall_factory(corners[d], [0.1], [0.1])
r = wall.side(p)
print('{}: returned={} expected={}'.format(label, r, r_exp))
return r == r_exp
def run_side(label):
p = points[label]["p"]
r_exp = points[label]["expect"]
d = points[label]["d"]
wall = pra.wall_factory(corners[d], [0.1], [0.1])
r = wall.side(p)
print("{}: returned={} expected={}".format(label, r, r_exp))
return r == r_exp
def test_notcontains_3D(self):
walls = [
pra.wall_factory(c, [a], [s])
for c, a, s in zip(wall_corners_3D, absorptions_3D, scatterings_3D)
]
obstructing_walls = []
microphones = np.array([[5.0], [7.0], [40]])
room = room_factory(walls, obstructing_walls, microphones)
self.assertTrue(not room.contains(microphones[:, 0]))
def test_contains_2D(self):
walls = [
pra.wall_factory(c, [a], [s]) for c, a, s in zip(
wall_corners_2D_non_convex, absorptions_2D, scatterings_2D)
]
obstructing_walls = []
microphones = np.array([[0.5], [0.2]])
room = room_factory(walls, obstructing_walls, microphones)
self.assertTrue(room.contains(microphones[:, 0]))
def test_reflected_end2D(self):
eps = 0.001
start = [1, 3]
hit = [5, 3]
#normal = [-1, -1]
corners = np.array([
[6, 4],
[4, 6],
])
wall = pra.wall_factory(corners, [0.1], [0.1])
length = 4
res = wall.normal_reflect(start, hit, length)
self.assertTrue(np.allclose(res, [5., -1.], atol=eps))
def run_reflect(label):
p = points[label]['p']
p_refl = np.array(points[label]['reflect'])
r_exp = points[label]['expect']
d = points[label]['d']
wall = pra.wall_factory(corners[d], [0.1], [0.1])
x = np.zeros(wall.dim, dtype=np.float32)
wall.reflect(p, x)
err = np.linalg.norm(x - p_refl) < eps
print('{}: error={}'.format(label, err))
return err
def test_next_wall_hit(self):
walls = [
pra.wall_factory(c, [a], [s])
for c, a, s in zip(wall_corners_3D, absorptions_3D, scatterings_3D)
]
obstructing_walls = []
microphones = np.array([
[
1.0,
],
[
1.0,
],
[
1.0,
],
])
room = room_factory(walls, obstructing_walls, microphones)
eps = 0.001
# start on one empty space
start = [-2, 4, 1]
# end at the same (x,y) but very high in the sky
end = [5, -3, 1]
# correct intersection
result = np.array([0, 2, 1])
ttuple = np.array(room.next_wall_hit(start, end, False))
correct_result = np.allclose(ttuple[0], result, atol=eps)
correct_next_wall = ttuple[1] == 4
correct_distance = np.allclose(ttuple[2],
np.linalg.norm(result - start))
self.assertTrue(correct_next_wall and correct_result
and correct_distance)
def test_max_dist_2D(self):
walls = [
pra.wall_factory(c, [a], [s])
for c, a, s in zip(wall_corners_2D, absorptions_2D, scatterings_2D)
]
obstructing_walls = []
microphones = np.array([
[
1,
],
[
1,
],
])
room = room_factory(walls, obstructing_walls, microphones)
eps = 0.001
result = room.get_max_distance()
self.assertEqual(result, np.sqrt(25) + 1)
def load_room(inpath):
with open(inpath, 'r') as file:
# get room dict
rdin = yaml.load(file, Loader=yaml.FullLoader)
walls = []
for w in rdin['walls']:
# TODO: checks for value and type of attributes
wcorners = np.array(w['corners']).T
mat = pra.Material(w['material']['absorption'],
w['material']['scattering'])
walls.append(
pra.wall_factory(wcorners, mat.energy_absorption['coeffs'],
mat.scattering['coeffs']))
room = pra.Room(walls,
fs=rdin['fs'],
max_order=rdin['max_order'],
air_absorption=rdin['air_absorption'],
ray_tracing=rdin['ray_tracing'])
return room
path_to_musis_stl_file = "./data/raw/MUSIS_3D_no_mics_simple.stl"
material = pra.Material(energy_absorption=0.2, scattering=0.1)
# with numpy-stl
the_mesh = mesh.Mesh.from_file(args.file)
ntriang, nvec, npts = the_mesh.vectors.shape
size_reduc_factor = 500.0 # to get a realistic room size (not 3km)
# create one wall per triangle
walls = []
for w in range(ntriang):
walls.append(
pra.wall_factory(
the_mesh.vectors[w].T / size_reduc_factor,
material.energy_absorption["coeffs"],
material.scattering["coeffs"],
))
room = (pra.Room(
walls,
fs=16000,
max_order=3,
ray_tracing=True,
air_absorption=True,
).add_source([-2.0, 2.0,
1.8]).add_microphone_array(np.c_[[-6.5, 8.5, 3 + 0.1],
[-6.5, 8.1, 3 + 0.1]]))
# compute the rir
room.image_source_model()
def add_obstacle(box, obstacle_faces, material):
for face in obstacle_faces:
box.walls.append(
pra.wall_factory(face.T, material.energy_absorption["coeffs"],
material.scattering["coeffs"]))
def test_square_room(self):
"""
This is a cubic room of 2x2x2 meters. The source is placed at [0.5,0.5, 1]
and the receiver at [1.5, 1.5, 1]. A ray is launched towards [1, 0, 1] so that
the first receiver hit is after travel distance of 2*sqrt(2) and each subsequent
hit travels a further 4*sqrt(2) until the threshold energy is reached.
"""
energy_absorption = 0.07
round_trip = 4 * np.sqrt(2)
energy_thresh = 1e-7
detector_radius = 0.15
hist_bin_size = 0.004 # resolution of histogram [s]
histogram_gt = SimpleHistogram(hist_bin_size * pra.constants.get("c"))
# Create the groundtruth list of energy and travel time
initial_energy = 2.0 # defined in libroom.Room.get_rir_entries
transmitted = 1.0 * (1.0 - energy_absorption)**2 * initial_energy
distance = round_trip / 2.0
while transmitted / distance > energy_thresh:
r_sq = distance**2
p_hit = 1.0 - np.sqrt(1.0 - detector_radius**2 / r_sq)
histogram_gt.add(distance, transmitted / (r_sq * p_hit))
transmitted *= (1.0 - energy_absorption)**4 # 4 wall hits
distance += round_trip
print("Creating the python room (polyhedral)")
walls_corners = [
np.array([[0, 2, 2, 0], [0, 0, 0, 0], [0, 0, 2, 2]]), # left
np.array([[0, 0, 2, 2], [2, 2, 2, 2], [0, 2, 2, 0]]), # right
np.array([[0, 0, 0, 0], [0, 2, 2, 0], [0, 0, 2, 2]]), # front`
np.array([[2, 2, 2, 2], [0, 0, 2, 2], [0, 2, 2, 0]]), # back
np.array([
[0, 2, 2, 0],
[0, 0, 2, 2],
[0, 0, 0, 0],
]), # floor
np.array([
[0, 0, 2, 2],
[0, 2, 2, 0],
[2, 2, 2, 2],
]), # ceiling
]
walls = [
pra.wall_factory(c, [energy_absorption], [0.0])
for c in walls_corners
]
room_poly = pra.Room(walls, fs=16000)
# room = pra.Room(walls, fs=16000)
room_poly.add_source([0.5, 0.5, 1])
room_poly.add_microphone_array(
pra.MicrophoneArray(np.c_[[1.5, 1.5, 1.0]], room_poly.fs))
room_poly.room_engine.set_params(
room_poly.c,
0,
energy_thresh, # energy threshold for rays
5.0, # time threshold for rays
detector_radius, # detector radius
hist_bin_size, # resolution of histogram [s]
False, # is it hybrid model ?
)
print("Running ray tracing (polyhedral)")
room_poly.room_engine.ray_tracing(
np.c_[[-np.pi / 4.0, np.pi / 2.0]],
room_poly.sources[0].position, # source loc
)
print("Creating the python room (shoebox)")
room_cube = pra.ShoeBox([2, 2, 2],
fs=16000,
materials=pra.Material(energy_absorption))
# room = pra.Room(walls, fs=16000)
room_cube.add_source([0.5, 0.5, 1])
room_cube.add_microphone_array(
pra.MicrophoneArray(np.c_[[1.5, 1.5, 1.0]], room_poly.fs))
room_cube.room_engine.set_params(
room_poly.c,
0,
energy_thresh, # energy threshold for rays
5.0, # time threshold for rays
detector_radius, # detector radius
hist_bin_size, # resolution of histogram [s]
False, # is it hybrid model ?
)
print("Running ray tracing (shoebox)")
room_cube.room_engine.ray_tracing(
np.c_[[-np.pi / 4.0, np.pi / 2.0]],
room_cube.sources[0].position, # source loc
)
h_poly = room_poly.room_engine.microphones[0].histograms[0].get_hist()
h_cube = room_cube.room_engine.microphones[0].histograms[0].get_hist()
histogram_rt_poly = np.array(h_poly[0])[:len(histogram_gt)]
histogram_rt_cube = np.array(h_cube[0])[:len(histogram_gt)]
self.assertTrue(np.allclose(histogram_rt_poly, histogram_gt))
self.assertTrue(np.allclose(histogram_rt_cube, histogram_gt))
def test_wall_3d_construct_1():
''' Tests construction of a wall '''
w_info = walls[1]
wall = pra.wall_factory(w_info['corners'], [0.2], [0.1])
return wall
def test_wall_3d_construct_1():
"""Tests construction of a wall"""
w_info = walls[1]
wall = pra.wall_factory(w_info["corners"], [0.2], [0.1])
return wall
