def lf_lfc(time, reflectogram, id_dir, freq, time_cat, intensity_cat, cos_cat):
'''
This function is used to calculate LF and LFC
'''
# bi-directional intensityes for LF
intensity_cos2 = np.multiply(intensity_cat, cos_cat**2)
# log.info(cos_cat**2)
reflecto_cos2 = reflectogram_hist(time, time_cat, intensity_cos2)
# bi-directional intensityes for LFC
intensity_cosabs = np.multiply(intensity_cat, np.abs(cos_cat))
reflecto_cosabs = reflectogram_hist(time, time_cat, intensity_cosabs)
## The next two lines get direct sound without any information from source and receiver
LF = np.zeros(freq.size, dtype = np.float32)
LFC = np.zeros(freq.size, dtype = np.float32)
jf = 0
# log.info("time dir: {}".format(time[id_dir]))
id_0to80 = np.where(time <= 0.080 + time[id_dir])
# id_0to800 = np.where(time[id_0to80[0]] >= time[id_0to80[0]])
# log.info("time 0-80: {}".format(time[id_0to800[0]]))
id_5to80 = np.where(time[id_0to80[0]] >= 0.005 + time[id_dir])
# log.info("time 5-80: {}".format(time[id_5to80[0]]))
for jref, ref in enumerate(reflectogram):
np.seterr(divide = 'ignore')
try:
refcos2 = reflecto_cos2[jf,:]
LF[jref] = 100 * np.sum(refcos2[id_5to80[0]]) / np.sum(ref[id_0to80[0]])
refcosabs = reflecto_cosabs[jf,:]
LFC[jref] = 100 * np.sum(refcosabs[id_5to80[0]]) / np.sum(ref[id_0to80[0]])
except:
log.info("I could not calculate LF and LFC for the {}.".format(freq[jf])+
"[Hz] frequency band. Try to use more rays or"+
"extend the length of h(t) of the simmulation.")
jf=+1
return LF, LFC
def start(self):
# loop through every single ray
for src_rays in self.rays:
log.info(src_rays.nrays)
progress = tqdm(np.ndindex((src_rays.nrays, src_rays.niters)))
for (rayid, rayit) in progress:
if src_rays.length[rayid] != src_rays.niters:
continue
plane, rhit = self.ray_x_planes(r0=src_rays.ris[rayid, rayit],
rd=src_rays.rds[rayid, rayit])
try:
src_rays.ris[rayid, rayit + 1] = rhit
except IndexError:
# trying to add an element beyond the array size. Using a
# try/except block is faster than using an if statement
pass
else:
# compute the new direction but first check if this plane
# is part of the bounding box
if plane.bbox:
src_rays.length[rayid] = rayit + 2
rd = src_rays.rds[rayid, rayit]
n = plane.normal
rr = -2 * np.dot(rd, n) * n + rd
src_rays.rds[rayid, rayit + 1] = rr
def __init__(self, geo_cfg, alpha, s):
'''
Set up the room geometry from the .dae file
Geometry consists of: Volume, Total ara and an
array of plane objects. Each plane object will be
processed in a c++ class and have the following att:
- name (string)
- bounding box (bool)
- list of vertices (Eigen<double> - Nvert x 3)
- normal (Eigen<double> - 1 x 3)
- vert_x - 2D polygon x coord (Eigen<double> - 1 x Nvert)
- vert_y - 2D polygon y coord (Eigen<double> - 1 x Nvert)
- nig - 2D normal components index (Eigen<int> - 1 x 2)
- area (double)
- centroid (Eigen<double> - 1 x 3)
- alpha - absorption coefficient (Eigen<double> - 1 x Nfreq)
- s - scattering coefficient (double)
'''
# toml file
daepath = geo_cfg['room'] # path to .dae
# Load an array of plane objects
self.planes = [] # A list of planes (object with attributes)
mesh = co.Collada(daepath)
for obj in mesh.scene.objects('geometry'): #loop every obj
for triset in obj.primitives(): #loop every primitives
# First if excludes the non-triangles objects
if type(triset) != co.triangleset.BoundTriangleSet:
log.info('Warning: non-supported primitive ignored!')
continue
# Loop trhough all triangles
for jp, tri in enumerate(triset):
# Define a single plane object
name = '{}-{}'.format(obj.original.name, jp)
vertices = np.array(tri.vertices)
normal = np.float32(tri.normals[0] /
np.linalg.norm(tri.normals[0]))
vert_x, vert_y, normal_nig = vert_2d(normal, vertices)
area = np.float64(triangle_area(vertices))
centroid = np.float32(triangle_centroid(vertices))
alpha_v = np.float32(alpha[jp])
################### cpp plane class #################
plane = ra_cpp.Planecpp(name, False, vertices, normal,
vert_x, vert_y, normal_nig, area,
centroid, alpha_v, s[jp])
################### py plane class ################
# plane = PyPlane(name, False, vertices, normal,
# vert_x, vert_y, normal_nig, area, centroid,
# alpha[jp], s[jp])
# Append plane object
self.planes.append(plane)
# total area and volume
self.total_area = total_area(self.planes)
self.volume = volume(self.planes)
def load_dae_geometry(self, daepath):
planes = []
mesh = co.Collada(daepath)
for obj in mesh.scene.objects('geometry'):
for triset in obj.primitives():
if type(triset) != co.triangleset.BoundTriangleSet:
log.info('Warning: non-supported primitive ignored!')
continue
for i, tri in enumerate(triset):
plane = Plane(name='{}-{}'.format(obj.original.name, i),
vertices=tri.vertices,
normal=tri.normals[0] /
np.linalg.norm(tri.normals[0]))
planes.append(plane)
return planes
def dump(self):
log.info('number of escaped rays: {}/{}={}%'.format(
self.n_escaped_rays, self.rays[0].nrays,
np.around(100 * self.n_escaped_rays / self.rays[0].nrays,
decimals=2)))
rays = []
for r in self.rays:
rays.append({'ris': r.ris.tolist(), 'length': r.length.tolist()})
sim_json = {'rays': rays}
json.dump(
sim_json,
codecs.open('sim.json', 'w', encoding='utf-8'),
separators=(',', ':'),
sort_keys=True,
# indent=4
)
def process_results(Dt, ht_length, freq, sources, receivers):
'''
This function process all the relevant source-receiver data, such as:
reflectogram, decay and acoustical parameters. Each receiver
will be appended to each source to store the results of
each source-receiver (vs. time or vs. frequency) pair.
'''
log.info("processing results...")
time_bins = np.arange(0.0, 1.2 * ht_length, Dt)
sou = []
for s in sources:
rec = [] #SRPairRec()
for jrec, r in enumerate(receivers):
rec.append(RecResults(s, jrec, time_bins, freq))
sou.append(SouResults(rec, time_bins, freq))
return sou
def main():
time_start = time.time()
sim = Simulation(cfgfile='simulation.toml')
log.info('Starting simulation...')
sim.start()
log.info('Simulation over.\nDumping data now...')
sim.dump()
log.info('All data has been dumped!')
log.info('Terminated in: %.4f s' % (time.time() - time_start))
def ts(time, reflectogram, id_dir, freq):
'''
This function is used to calculate T30 by curve fitting the decay from -5 dB to -25dB
'''
## The next two lines get direct sound without any information from source and receiver
Ts = np.zeros(freq.size, dtype = np.float32)
jf = 0
for jref, ref in enumerate(reflectogram):
np.seterr(divide = 'ignore')
try:
Ts[jref] = 1000 * (np.sum(np.multiply(time[id_dir:], ref[id_dir:]))/np.sum(ref[id_dir:]) - time[id_dir])
except:
log.info("I could not calculate Ts for the {}.".format(freq[jf])+
"[Hz] frequency band. Try to use more rays or"+
"extend the length of h(t) of the simmulation.")
jf=+1
return Ts
def __init__(self, source, jrec, time_bins, freq):
start_time = time.time()
# Time concatenation
# time_cat = np.array(ra_cpp._time_cat(
# source.rays, source.reccrossdir[jrec].time_dir, jrec), dtype = np.float32)
time_cat = np.array(ra_cpp._time_cat(
source.rays, source.reccrossdir[jrec].time_dir, jrec,
source.reccrossdir[jrec].size_of_time), dtype = np.float32)
# log.info("time cat size: {}.".format(len(time_cat)))
# log.info("size_of_tme: {}.".format(source.reccrossdir[jrec].size_of_time))
# sort time vector
# id_sorted_time = np.argsort(time_cat)
# time_sorted = time_cat[id_sorted_time]
# concatenate sound intensities
# start_time = time.time()
intensity_cat = np.array(ra_cpp._intensity_cat(
source.rays, source.reccrossdir[jrec].i_dir,
jrec, time_cat.size), dtype = np.float32)
# Cossine concatenation
cos_cat = np.array(ra_cpp._cos_cat(
source.rays, source.reccrossdir[jrec].cos_dir, jrec,
source.reccrossdir[jrec].size_of_time), dtype = np.float32)
# log.info(" {} seconds to concatenate intensity (c++).".format(time.time() - start_time))
# sort intensity
# intensity_sorted = intensity_cat[:, id_sorted_time]
# reflectogram
self.reflectogram = reflectogram_hist(time_bins, time_cat, intensity_cat)
# self.reflectogram = reflectogram_hist(time_bins, time_sorted, intensity_sorted)
self.decay = decay_curve(self.reflectogram)
log.info(" {} seconds to calc reflectogram (c++).".format(time.time() - start_time))
# Calculate the direct sound id
direct_sound_idarr = np.nonzero(self.reflectogram[0,:])
id_dir = direct_sound_idarr[0]
# Calculate acoustical parameters
self.EDT = edt(time_bins, self.decay, id_dir[0], freq)
self.T20 = t20(time_bins, self.decay, id_dir[0], freq)
self.T30 = t30(time_bins, self.decay, id_dir[0], freq)
self.C80 = c80(time_bins, self.reflectogram, id_dir[0], freq)
self.D50 = d50(time_bins, self.reflectogram, id_dir[0], freq)
self.Ts = ts(time_bins, self.reflectogram, id_dir[0], freq)
self.G = g_db(self.reflectogram, source.power_lin, freq)
self.LF, self.LFC = lf_lfc(time_bins, self.reflectogram, id_dir[0], freq, time_cat, intensity_cat, cos_cat)
def g_db(reflectogram, Wlin, freq):
'''
This function is used to calculate T30 by curve fitting the decay from -5 dB to -25dB
'''
## The next two lines get direct sound without any information from source and receiver
G = np.zeros(freq.size, dtype = np.float32) - np.inf
jf = 0
for jref, ref in enumerate(reflectogram):
np.seterr(divide = 'ignore')
try:
G[jref] = 10.0 * np.log10(np.sum(ref)) -\
10.0 * np.log10(Wlin[jref] / (4.0 * np.pi * 100.0))
except:
log.info("I could not calculate G for the {}.".format(freq[jf])+
"[Hz] frequency band. Try to use more rays or"+
"extend the length of h(t) of the simmulation.")
jf=+1
return G
def d50(time, reflectogram, id_dir, freq):
'''
This function is used to calculate T30 by curve fitting the decay from -5 dB to -25dB
'''
## The next two lines get direct sound without any information from source and receiver
D50 = np.zeros(freq.size, dtype = np.float32)-0.1
jf = 0
for jref, ref in enumerate(reflectogram):
np.seterr(divide = 'ignore')
try:
id_to_sum = np.where(time <= 0.050 + time[id_dir])
D50[jref] = 100 * np.sum(ref[id_to_sum[0]]) / np.sum(ref)
except:
log.info("I could not calculate D50 for the {}.".format(freq[jf])+
"[Hz] frequency band. Try to use more rays or"+
"extend the length of h(t) of the simmulation.")
jf=+1
return D50
def t30(time, decay, id_dir, freq):
'''
This function is used to calculate T30 by curve fitting the decay from -5 dB to -25dB
'''
## The next two lines get direct sound without any information from source and receiver
T30 = np.zeros(freq.size, dtype = np.float32)
jf = 0
for jdec, dec in enumerate(decay):
np.seterr(divide = 'ignore')
decdB = 10 * np.log10(dec[id_dir:]/
np.amax(dec[id_dir:]))
# log.info(time.shape)
id_to_fit = np.where((decdB < -5.0) & (decdB > -35.0))
try:
p = np.polyfit(time[id_to_fit], decdB[id_to_fit], 1)
T30[jdec] = -60 / p[0]
except:
log.info("I could not calculate T30 for the {}.".format(freq[jf])+
"[Hz] frequency band. Try to use more rays or"+
"extend the length of h(t) of the simmulation.")
jf=+1
return T30
def run(cfgs):
##### Setup algorithm controls ########
# FIXME: use pathlib instead of string concatenation
controls = AlgControls(cfgs['sim_cfg']['controls'])
##### Setup air properties ########
air = AirProperties(cfgs['sim_cfg']['air'])
air_m = air.air_absorption(controls.freq)
##### Setup materials #############
alpha_list = load_matdata_from_mat(cfgs['sim_cfg']['material'])
alpha, s = get_alpha_s(cfgs['sim_cfg']['geometry'],
cfgs['mat_cfg']['material'], alpha_list)
##### Setup Geometry ###########
geo = GeometryMat(cfgs['sim_cfg']['geometry'], alpha, s)
# geo.plot_mat_room(normals = 'on')
# geo = Geometry('simulation.toml', alpha, s)
# geo.plot_dae_room(normals = 'on')
##### Statistical theory ############
res_stat = StatisticalMat(geo, controls.freq, air.c0, air_m)
res_stat.t60_sabine()
res_stat.t60_eyring()
# res_stat.t60_kutruff(gamma=0.4)
# res_stat.t60_araup()
# res_stat.t60_fitzroy()
# res_stat.t60_milsette()
# res_stat.plot_t60()
##### ray's initial direction ########
rays_i_v = RayInitialDirections()
# rays_i_v.single_ray([0.0, -1.0, 0.0])#([0.7236, -0.5257, 0.4472])
# rays_i_v.isotropic_rays(controls.Nrays) # 15
# mat = spio.loadmat('ra/vin_matlab.mat')
# rays_i_v.vinit = mat['vin']
rays_i_v.random_rays(controls.Nrays)
# rays_i_v.single_ray(rays_i_v.vinit[41])
log.info("The number of rays is {}.".format(rays_i_v.Nrays))
##### Setup receiver, reccross and reccrossdir ########
receivers, reccross, reccrossdir = setup_receivers(
cfgs['sim_cfg']['receivers'])
#### Allocate some memory in python for geometrical ray tracing ########################
# Estimate max reflection order
N_max_ref = math.ceil(1.5 * air.c0 * controls.ht_length * \
(geo.total_area / (4 * geo.volume)))
# Allocate according to max reflection order
rays = ray_initializer(rays_i_v, N_max_ref, controls.transition_order,
reccross)
##### Setup sources - ray history goes inside source object ########
sources = setup_sources(cfgs['sim_cfg']['sources'], rays, reccrossdir)
############# Now - the calculations ####################
############### direct sound ############################
sources = ra_cpp._direct_sound(sources, receivers,
controls.rec_radius_init, geo.planes,
air.c0, rays_i_v.vinit)
############### ray tracing ##############
sources = ra_cpp._raytracer_main(
controls.ht_length, controls.allow_scattering,
controls.transition_order, controls.rec_radius_init,
controls.alow_growth, controls.rec_radius_final, sources, receivers,
geo.planes, air.c0, rays_i_v.vinit)
######## Calculate intensities ###################
sources = ra_cpp._intensity_main(controls.rec_radius_init, sources, air.c0,
air.m, res_stat.alphas_mtx)
########### Process reflectograms and acoustical parameters #####################
sou = process_results(controls.Dt, controls.ht_length, controls.freq,
sources, receivers)
########## Statistics ##########################################################
stats = SRStats(sou)
######## some plotting ##############################
# sou[0].plot_single_reflecrogram(band = 4, jrec = 2)
# plt.show()
# sou[0].plot_single_reflecrogram(band = 4, jrec = 1)
sou[0].plot_decays()
# sou[0].plot_edt()
# sou[0].plot_t20()
# sou[0].plot_t30()
# sou[0].plot_c80()
# sou[0].plot_d50()
# sou[0].plot_ts()
# sou[0].plot_g()
# sou[0].plot_lf()
# sou[0].plot_lfc()
# log.info(sources[0].rays[0].refpts_hist)
# geo.plot_raypath(sources[0].coord, sources[0].rays[0].refpts_hist, # <-- sources[0].rays[0].refpts_hist
# receivers)
# log.info(sources[0].reccrossdir[0].cos_dir)
############# Save trial #########################
# import pickle
# path = '/home/eric/dev/ra/data/legacy/ptb_studio_ph3/'
# pkl_fname_res = 'ptb_studio_ph3_open' # simulation results name
# with open(path+pkl_fname_res+'.pkl', 'wb') as output:
# pickle.dump(res_stat, output, pickle.HIGHEST_PROTOCOL)
# pickle.dump(sou, output, pickle.HIGHEST_PROTOCOL)
# pickle.dump(stats, output, pickle.HIGHEST_PROTOCOL)
# pickle.dump(geo, output, pickle.HIGHEST_PROTOCOL)
# pickle.dump(sources, output, pickle.HIGHEST_PROTOCOL)
# class Simulation():
# def __init__(self,):
# self.cfgs = {}
# self.sources = []
# self.receivers = []
# self.geometry = {}
# def set_configs(self, cfgs):
# self.cfgs = cfgs['sim_cfg']
# self.mat_cfg = cfgs['mat_cfg']
# self.controls = AlgControls(self.cfgs['controls'])
# self.air = AirProperties(self.cfgs['air'])
# self.air_m = self.air.air_absorption(self.controls.freq)
# def set_sources(self, srcs):
# '''
# Parameters:
# ----------
# srcs: list of Source's
# '''
# # self.rays_i_v = RayInitialDirections()
# # self.rays_i_v.random_rays(self.controls.Nrays)
# # log.info("The number of rays is {}.".format(self.rays_i_v.Nrays))
# # c0 = self.air.c0
# # htl = self.controls.ht_length
# # area = self.geo.total_area
# # volume = self.geo.volume
# # N_max_ref = math.ceil(1.5 * c0 * htl * area / (4 * volume))
# # rays = ray_initializer(
# # self.rays_i_v, N_max_ref, self.controls.transition_order,
# # self.reccross
# # )
# # self.sources = setup_sources(
# # self.cfgs['sources'], rays, self.reccrossdir
# # )
# def set_receivers(self, rcvrs):
# '''
# Parameters:
# -----------
# rcvrs: list of Receiver`s
# '''
# new_rcvrs = []
# for r in rcvrs:
# r.append({
# 'position': r.coord,
# 'orientation': r.orientation
# })
# self.receivers, self.reccross, self.reccrossdir = setup_receivers(
# new_rcvrs
# )
# # self.receivers, self.reccross, self.reccrossdir = setup_receivers(
# # self.cfgs['receivers']
# # )
# def set_geometry(self, geom):
# '''
# Parameters:
# -----------
# geom: list of dicts with the following parameters: 'name',
# 'vertices', 'normal', alpha, s.
# '''
# # to be populated
# # ...
# pass
# # cfgs = self.cfgs
# # alpha_list = load_matdata_from_mat(cfgs['material'])
# # alpha, s = get_alpha_s(
# # cfgs['geometry'], self.mat_cfg['material'], alpha_list
# # )
# # self.geo = GeometryMat(cfgs['geometry'], alpha, s)
# def run(self, state):
# '''
# Parameters:
# ----------
# Return:
# -------
# dict with the following structure:
# {
# 'rays':,
# ''
# }
# '''
# res_stat = StatisticalMat(
# self.geo, self.controls.freq, self.air.c0, self.air_m
# )
# res_stat.t60_sabine()
# res_stat.t60_eyring()
# srcs, rcvrs = self.sources, self.receivers
# srcs = ra_cpp._direct_sound(
# srcs, rcvrs, self.controls.rec_radius_init,
# self.geo.planes, self.air.c0, self.rays_i_v.vinit
# )
# ctls = self.controls
# srcs = ra_cpp._raytracer_main(
# ctls.ht_length, ctls.allow_scattering, ctls.transition_order,
# ctls.rec_radius_init, ctls.alow_growth, ctls.rec_radius_final, srcs,
# rcvrs, self.geo.planes, self.air.c0, self.rays_i_v.vinit
# )
# srcs = ra_cpp._intensity_main(ctls.rec_radius_init,
# srcs, self.air.c0, self.air.m, res_stat.alphas_mtx)
# sou = process_results(ctls.Dt, ctls.ht_length,
# ctls.freq, srcs, rcvrs)
# stats = SRStats(sou)
# def stats(self,):
# pass
# def save(self,):
# '''
# Return:
# ------
# a dict with the state of the simulation.
# '''
# pass
