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from __future__ import division
from __future__ import print_function
##############################################################################
#
# Copyright (c) 2003-2018 by The University of Queensland
# http://www.uq.edu.au
#
# Primary Business: Queensland, Australia
# Licensed under the Apache License, version 2.0
# http://www.apache.org/licenses/LICENSE-2.0
#
# Development 2012-2013 by School of Earth Sciences
# Development from 2014 by Centre for Geoscience Computing (GeoComp)
#
##############################################################################
from __future__ import print_function
__copyright__="""Copyright (c) 2003-2018 by The University of Queensland
http://www.uq.edu.au
Primary Business: Queensland, Australia"""
__license__="""Licensed under the Apache License, version 2.0
http://www.apache.org/licenses/LICENSE-2.0"""
__url__="https://launchpad.net/escript-finley"
from esys.escript import *
from esys.escript import unitsSI as U
from esys.escript.pdetools import Locator
from esys.weipa import saveSilo
from esys.downunder import Ricker, SonicHTIWave, SimpleSEGYWriter
from math import ceil
import time, os
try:
from esys.ripley import Brick, Rectangle
HAVE_RIPLEY = True
except ImportError:
HAVE_RIPLEY = False
if HAVE_RIPLEY:
DIM=2 # spatial dimension
# layers from the bottom up:
layers = [ 1*U.km , 1*U.km ,700*U.m, 500*U.m, 800*U.m ]
v_Ps= [ 3.8 * U.km/U.sec , 3. * U.km/U.sec, 2.5*U.km/U.sec, 1.9*U.km/U.sec, 1.5*U.km/U.sec]
epss =[ 0., 0.24, 0, 0.1, 0]
deltas=[ 0., 0.1, 0.,0.03,0 ]
azmths=[ 0.,0.,0, 0, 0.]
dt=0.5*U.msec
ne_z=40
dt=0.5*U.msec
t_end=0.008*U.sec #only this low for testing purposes
frq=15.*U.Hz
tcenter=None
sampling_interval=4*U.msec
numRcvPerLine=101
rangeRcv=4.*U.km
src_dir=[0,1]
absorption_zone=1000*U.m
# location of source in crossing array lines with in 0..numRcvInLine one needs to be None
srcEW=numRcvPerLine//2
srcNS=None
# dommain dimension
width_x=rangeRcv + 2*absorption_zone
width_y=width_x
depth=sum(layers)
ne_x=int(ceil(ne_z*width_x/depth))
#
# create array
#
receiver_line=[ absorption_zone + i * (rangeRcv//(numRcvPerLine-1) ) for i in range(numRcvPerLine) ]
#
# set source location with tag "source""
#
src_tags=["source"]
if srcEW:
srcNS=numRcvPerLine//2
elif srcNS:
srcEW=numRcvPerLine//2
else:
raise ValueError("on of the variables srcEW or srcNS must be None!")
if DIM == 2:
src_locations = [ (receiver_line[srcEW], depth) ]
src_loc_2D=(receiver_line[srcEW], 0.)
else:
src_locations = [ (receiver_line[srcEW], receiver_line[srcNS], depth)]
src_loc_2D=(receiver_line[srcEW], receiver_line[srcNS])
#
# create sensor arrays:
#
# East-west line of receiver
rcv_locations=[]
rg=[]
mid_point=receiver_line[len(receiver_line)//2]
for ix in range(len(receiver_line)):
if DIM == 2:
rcv_locations.append((receiver_line[ix], depth))
rg.append( ( receiver_line[ix], 0.) )
else:
rcv_locations.append((receiver_line[ix], mid_point, depth))
rg.append( ( receiver_line[ix], mid_point) )
# North-south line of receiver
if DIM == 3:
for iy in range(len(receiver_line)):
rcv_locations.append((mid_point, receiver_line[iy], depth))
rg.append( ( mid_point, receiver_line[iy]) )
#
# create domain:
#
if DIM == 2:
domain=Rectangle(ne_x, ne_z ,l0=width_x, l1=depth,
diracPoints=src_locations, diracTags=src_tags)
else:
domain=Brick(ne_x,ne_x,ne_z,l0=width_x,l1=width_y,l2=depth,
diracPoints=src_locations, diracTags=src_tags)
wl=Ricker(frq, tcenter)
#======================================================================
z=Function(domain).getX()[DIM-1]
z_bottom=0
v_p=0
delta=0
vareps=0
azmth=0
rho=0
for l in range(len(layers)):
m=wherePositive(z-z_bottom)*whereNonPositive(z-(z_bottom+layers[l]))
v_p=v_p*(1-m)+v_Ps[l]*m
vareps=vareps*(1-m)+epss[l]*m
azmth=azmth*(1-m)+azmths[l]*m
delta=delta*(1-m)+deltas[l]*m
z_bottom+=layers[l]
sw=SonicHTIWave(domain, v_p, wl, src_tags[0], dt=dt, source_vector = src_dir, eps=vareps, delta=delta, azimuth=azmth, \
absorption_zone=absorption_zone, absorption_cut=1e-2, lumping=False)
#
# print some info:
#
print("ne_x = ", ne_x)
print("ne_z = ", ne_z)
print("h_x = ", width_x/ne_x)
print("h_z = ", depth/ne_z)
print("dt = ", sw.getTimeStepSize()*1000, "msec")
print("width_x = ", width_x)
print("depth = ", depth)
print("number receivers = ", numRcvPerLine)
print("receiver spacing = ", receiver_line[1]-receiver_line[0])
print("sampling time = ", sampling_interval*1000,"msec")
print("source @ ", src_locations[0])
#
loc=Locator(domain,rcv_locations)
tracerP=SimpleSEGYWriter(receiver_group=rg, source=src_loc_2D, sampling_interval=sampling_interval, text='P')
tracerQ=SimpleSEGYWriter(receiver_group=rg, source=src_loc_2D, sampling_interval=sampling_interval, text='Q')
if not tracerP.obspy_available():
print("\nWARNING: obspy not available, SEGY files will not be written\n")
elif getMPISizeWorld() > 1:
print("\nWARNING: SEGY files cannot be written with multiple processes\n")
t=0.
OUT_DIR="out%sm%smus"%(int(width_x/ne_x),int(sw.getTimeStepSize()*1000000))
mkDir(OUT_DIR)
n=0
k=0
timer1=time.time()
while t < t_end:
t,u = sw.update(t+sampling_interval)
Plog=loc(u[1])
Qlog=loc(u[0])
tracerP.addRecord(Plog)
tracerQ.addRecord(Qlog)
print(t, wl.getValue(t)," :", Plog[0], Plog[srcEW], Plog[-1])
timer1=time.time()-timer1
print("time= %e sec; %s sec per step"%(timer1,timer1/max(sw.n,1)))
if tracerP.obspy_available() and getMPISizeWorld() == 1:
tracerP.write(os.path.join(OUT_DIR,'lineP.sgy'))
tracerQ.write(os.path.join(OUT_DIR,'lineQ.sgy'))
else: # no ripley
print("The Ripley module is not available")
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