def streamingHydroZ_old(inStream, in_format_dict, outStream,
time_interval=default_time_interval,
starting_time=default_starting_time,
endding_time=default_endding_time,
extended_evolusion=True,
t_sig="tau", x_sig="x", y_sig="y",
ed_sig="e",
use_compact_output=True, ed_dec=0.18, ed_smallness=smallness,
slice1_stream=None, slice2_stream=None,
):
""" This function reads in the sample data stream for hydro evolution
in the plane z=0, then extends it to z-direction using free streaming
in z direction. The evolution is between starting_time and endding_time.
-- inStream, outStream: where to read and write (string streams).
-- in_format_dict: dictionaries that gives the format of data streams
(see assignmentFormat.assignmentExprStream2IndexDict).
-- time_interval: by which time interval should particles be transported.
-- starting_time, endding_time: if not None, only particle trajectory
within time range [starting_time, endding_time] are outputted.
-- xxx_sig: keys to be used with in_format_dict to identify which columns
give the desired data.
-- use_compact_output: when set to True, only those cells in the "leading"
slices or those have ed close to ed_dec (within smallness) will be
outputted. The two slices will be outputted into slice1_stream and
slice2_stream separately, and the rest of freeze-out surface will be
outputted into the outStream.
Besides writing data to outStream, this function also returns the
format dictionary for output data stream.
Note that a more efficient way would be to store those readed cells in
memory then write them out without re-do the checking etc. (FUTURE)
"""
# convert in stream to desired data
extract_info_func = getReorderingFunction(in_format_dict, {t_sig:0, x_sig:1, y_sig:2, ed_sig:3}, indexStartsWith1=False)
# start to build the evolution
max_time_index = int(floor((endding_time-starting_time)/time_interval))
for time_idx in range(max_time_index):
time = starting_time + time_idx*time_interval
inStream.seek(0) # reset the pointer to the 1st character
for aLine in inStream:
aLine = matrix(aLine).tolist()[0] # convert to numerical data
t, x, y, ed = extract_info_func(aLine) # get info from hydro file
if t>time: break # assume that the data are stored in forward time order, data beyond this line should be ignored by causality
z = starting_time + (time-t) # z in the forward direction
# output to stream
if use_compact_output: # skip most of the output
if abs(t-starting_time)<1e-10:
# leading slices
slice1_stream.write("%e %e %e %e %e\n" % (time,x,y,z,ed))
slice2_stream.write("%e %e %e %e %e\n" % (time,x,y,-z,ed))
continue
if abs(ed-ed_dec)<ed_smallness:
# cell close to freeze-out either
outStream.write("%e %e %e %e %e\n" % (time,x,y,z,ed))
outStream.write("%e %e %e %e %e\n" % (time,x,y,-z,ed))
continue
else:
# forward direction
outStream.write("%e %e %e %e %e\n" % (time,x,y,z,ed))
# backward direction
if abs(z)>1e-10: outStream.write("%e %e %e %e %e\n" % (time,x,y,-z,ed))
continue
print("Processing time step: " + str(time_idx))
print("Done.")
return {"t":1, "x":2, "y":3, "z":4, "e":5}
def streamingHydroZ(inStream, in_format_dict, outStream,
time_interval=default_time_interval,
starting_time=default_starting_time,
endding_time=default_endding_time,
extended_time=-1,
t_sig="tau", x_sig="x", y_sig="y",
ed_sig="e", ed_dec=0.18,
ed_smallness=smallness,
):
""" This function reads in the sample data stream for hydro evolution
in the plane z=0, then extends it to z-direction using free streaming
in z direction. The evolution is between starting_time and endding_time.
-- inStream, outStream: where to read and write (string streams).
-- in_format_dict: dictionaries that gives the format of data streams
(see assignmentFormat.assignmentExprStream2IndexDict).
-- time_interval: by which time interval should particles be transported.
-- starting_time, endding_time: if not None, only particle trajectory
within time range [starting_time, endding_time] are outputted.
-- extended_time: whether to extend time evolution. The inner structure
will be will as the "leading" slices during this extended evolution.
If set to -1, the evolution time of the fireball will be used.
-- xxx_sig: keys to be used with in_format_dict to identify which columns
give the desired data.
Only those cells in the "leading" slices or those have ed close to
ed_dec (within smallness) will be outputted.
Besides writing data to outStream, this function also returns the
format dictionary for output data stream.
This version stores those readed cells in memory then write them out
without re-do the checking etc.
"""
# convert in stream to desired data
extract_info_func = getReorderingFunction(in_format_dict, {t_sig:0, x_sig:1, y_sig:2, ed_sig:3}, indexStartsWith1=False)
# first read-in all relavant cells to memory, also store the lastest time
stored_cells = [] # store those already registered cells (only in + direction)
flag_first_line = True
print("Read hydro movie and extract freeze-out surface info...")
counter = 1
for aLine in inStream:
aLine = matrix(aLine).tolist()[0] # convert to numerical data
t, x, y, ed = extract_info_func(aLine) # get info from hydro file
if flag_first_line:
earliest_time=t
latest_time=t
flag_first_line=False
if t>latest_time: latest_time=t
# output to stream
if t<=earliest_time:
# leading slices
stored_cells.append([t,x,y,ed])
continue
if abs(ed-ed_dec)<ed_smallness:
# cell close to freeze-out either
stored_cells.append([t,x,y,ed])
continue
if (counter % 100000)==0: print("Line %d reached..." % counter)
counter += 1
print("Total number of cells readed: " + str(len(stored_cells)) )
# start to build the evolution
max_time_index = int(floor((endding_time-starting_time)/time_interval))
for time_idx in range(max_time_index):
time = starting_time + time_idx*time_interval
for tau,x,y,ed in stored_cells:
if tau>time: break # assume that the data are stored in forward time order, data beyond this line should be ignored by causality
z = sqrt(time*time - tau*tau) # z in the forward direction; time: where z should be if it has speed of light; (t-earliest_time): delay
outStream.write("%e %e %e %e %e\n" % (time,x,y,z,ed))
outStream.write("%e %e %e %e %e\n" % (time,x,y,-z,ed))
print("Processing time step: " + str(time_idx))
# Extend the evolusion until all the fireball is out-of the view point (z>endding_time) the leading-slices are replaced by the inner structure of the fireball at the corresponding time
shift_time = time-earliest_time # all the time in the inStream will be shifted by this value; this is the "current time" before the "post process"
if extended_time<1: extended_time = latest_time # those slices with time larger than this value will be ignored
fixed_z = sqrt(time*time-earliest_time*earliest_time) # all the slices will be fixed at this z value
inStream.seek(0) # reset cell index in inStream
last_time = -1 # will trigger the variable flag_time_change to set to true, which will make the code to scan cells in the stored array and output them into file. The flag_time_change variable is usually triggered when the time read from inStream is changed.
search_stored_cell_from_idx = 0 # the stored array is searched starting from this index
search_stored_cell_until_idx = len(stored_cells) # last index
post_process_time_idx = 0 # keep track of steps
for aLine in inStream:
aLine = matrix(aLine).tolist()[0] # convert to numerical data
tau, x, y, ed = extract_info_func(aLine) # get info from hydro file
current_time = tau + shift_time # the current time (time is evolved while reading the inStream)
if current_time > shift_time + extended_time: break # ignore the rest
if current_time > last_time: flag_time_change = True
if flag_time_change:
flag_time_change = False
last_time = current_time
# scan and output cells from the stored array
for idx in range(search_stored_cell_from_idx, search_stored_cell_until_idx):
s_t,s_x,s_y,s_ed = stored_cells[idx] # "s" for stored
s_z = sqrt(current_time*current_time - s_t*s_t) # the would-be z location: slice_t is the actual elapsed time, (s_t-earliest_time) is the decay due to the fact this cell is not the earliest cell
if s_z >= fixed_z:
search_stored_cell_from_idx = idx+1 # store the last skipped index + 1: the next search starts here
continue # such cells are out-of-boundary
outStream.write("%e %e %e %e %e\n" % (current_time,s_x,s_y,s_z,s_ed))
outStream.write("%e %e %e %e %e\n" % (current_time,s_x,s_y,-s_z,s_ed))
print("Processing post process time step: " + str(post_process_time_idx))
post_process_time_idx += 1
# write out leading slices
outStream.write("%e %e %e %e %e\n" % (current_time,x,y,fixed_z,ed))
outStream.write("%e %e %e %e %e\n" % (current_time,x,y,-fixed_z,ed))
print("Done.")
return {"t":1, "x":2, "y":3, "z":4, "e":5}
def freeStreaming2d(inStream, in_format_dict, outStream,
time_interval=default_time_interval,
starting_time=default_starting_time,
endding_time=default_endding_time,
max_time_steps=default_max_time_steps,
coordinate_xy_boundary=default_coordinate_xy_boundary,
t_sig="tau", x_sig="FZ_x", y_sig="FZ_y",
E_sig="E", pT_sig="pT", phi_sig="phi"):
""" This function reads in the sample data stream for particles
from inStream, then free streams the particles and write the trajectory
of particles into ourStream.
-- inStream, outStream: where to read and write (string streams).
-- in_format_dict: dictionaries that gives the format of data streams
(see assignmentFormat.assignmentExprStream2IndexDict).
-- time_interval: by which time interval should particles be transported.
-- starting_time, endding_time: if not None, only particle trajectory
within time range [starting_time, endding_time] are outputted.
-- max_time_steps: if not None, then each particles are transported by
a maximum of this number of time steps.
-- coordinate_xy_boundary: if not None, then only particle trajectory
whose |x| or |y| values are outputted.
-- xxx_sig: keys to be used with in_format_dict to identify which columns
give the desired data.
Besides writing data to outStream, this function also returns the
format dictionary for output data stream.
"""
# first read-in particle info
extract_info_func = getReorderingFunction(in_format_dict, {t_sig:0, x_sig:1, y_sig:2, E_sig:3, pT_sig:4, phi_sig:5}, indexStartsWith1=False)
particles = []; smallest_time_idx = 0;
for aParticle in inStream:
aParticle = matrix(aParticle).tolist()[0] # convert to numerical data
# read particle info
t, x, y, pT, E, phi = extract_info_func(aParticle)
v = pT/E
vx = v*cos(phi);
vy = v*sin(phi);
t_idx = floor((t-starting_time)/time_interval)
prop_number = 0
# add particle info to the global list
particles.append([t_idx, prop_number, t,x,y,vx,vy]) # the 2nd element is used to store how many times this particle has been propergated
if t_idx<smallest_time_idx: smallest_time_idx = t_idx
# then simulate the free-streaming
time_idx = smallest_time_idx
while True:
time = starting_time + time_idx*time_interval
if time_idx>=0:
# write to output stream
# generate a "ghost particle" at the center
outStream.write("%d %e %e %e %e %e\n" % (time_idx, time, 0, 0, 0, 0))
# check time
if time>=starting_time:
# write other particles
for particle_idx in range(len(particles)-1,-1,-1): # inverse order b/c some elements will be deleted during the loop
t_idx, prop_number, t,x,y,vx,vy = particles[particle_idx]
# check number of propergation on this particle
if max_time_steps!=None:
if prop_number>max_time_steps:
particles.pop(particle_idx)
continue
# check (x,y)
if coordinate_xy_boundary!=None:
if abs(x)>coordinate_xy_boundary or abs(y)>coordinate_xy_boundary:
particles.pop(particle_idx)
continue
# sync time
if t_idx>time_idx: continue
# output particle to stream
outStream.write("%d %e %e %e %e %e\n" % (t_idx, t,x,y,vx,vy))
# propergate particles
for particle_idx in range(len(particles)):
t_idx, prop_number, t,x,y,vx,vy = particles[particle_idx]
if t_idx>time_idx: continue # only those particles generated before this time will be propergated
# free-streaming to next time
t_idx += 1
prop_number += 1
t += time_interval
x += time_interval*vx
y += time_interval*vy
particles[particle_idx] = [t_idx, prop_number, t,x,y,vx,vy]
time_idx += 1
print("Processing time step: " + str(time_idx))
if not particles: break # empty particle list
if time>endding_time: break
print("Done.")
return {"t_idx":1, "t":2, "x":3, "y":4, "v_x":5, "v_y":6}