def _parse_parameter_file(self):
# hardcoded for now
# These should be explicitly obtained from the file, but for now that
# will wait until a reorganization of the source tree and better
# generalization.
self.dimensionality = 3
self.refine_by = 2
self.parameters["HydroMethod"] = "ramses"
self.parameters["Time"] = 1.0 # default unit is 1...
# We now execute the same logic Oliver's code does
rheader = {}
def read_rhs(f, cast):
line = f.readline().replace("\n", "")
p, v = line.split("=")
rheader[p.strip()] = cast(v.strip())
with open(self.parameter_filename) as f:
for _ in range(6):
read_rhs(f, int)
f.readline()
for _ in range(11):
read_rhs(f, float)
f.readline()
read_rhs(f, str)
# This next line deserves some comment. We specify a min_level that
# corresponds to the minimum level in the RAMSES simulation. RAMSES is
# one-indexed, but it also does refer to the *oct* dimensions -- so
# this means that a levelmin of 1 would have *1* oct in it. So a
# levelmin of 2 would have 8 octs at the root mesh level.
self.min_level = rheader["levelmin"] - 1
# Now we read the hilbert indices
self.hilbert_indices = {}
if rheader["ordering type"] == "hilbert":
f.readline() # header
for _ in range(rheader["ncpu"]):
dom, mi, ma = f.readline().split()
self.hilbert_indices[int(dom)] = (float(mi), float(ma))
if rheader["ordering type"] != "hilbert" and self._bbox is not None:
raise NotImplementedError(
"The ordering %s is not compatible with the `bbox` argument." %
rheader["ordering type"])
self.parameters.update(rheader)
self.domain_left_edge = np.zeros(3, dtype="float64")
self.domain_dimensions = np.ones(
3, dtype="int32") * 2**(self.min_level + 1)
self.domain_right_edge = np.ones(3, dtype="float64")
# This is likely not true, but it's not clear
# how to determine the boundary conditions
self.periodicity = (True, True, True)
if self.force_cosmological is not None:
is_cosmological = self.force_cosmological
else:
# These conditions seem to always be true for non-cosmological datasets
is_cosmological = not (rheader["time"] >= 0 and rheader["H0"] == 1
and rheader["aexp"] == 1)
if not is_cosmological:
self.cosmological_simulation = 0
self.current_redshift = 0
self.hubble_constant = 0
self.omega_matter = 0
self.omega_lambda = 0
else:
self.cosmological_simulation = 1
self.current_redshift = (1.0 / rheader["aexp"]) - 1.0
self.omega_lambda = rheader["omega_l"]
self.omega_matter = rheader["omega_m"]
self.hubble_constant = rheader["H0"] / 100.0 # This is H100
force_max_level, convention = self._force_max_level
if convention == "yt":
force_max_level += self.min_level + 1
self.max_level = min(force_max_level,
rheader["levelmax"]) - self.min_level - 1
if self.cosmological_simulation == 0:
self.current_time = self.parameters["time"]
else:
self.tau_frw, self.t_frw, self.dtau, self.n_frw, self.time_tot = friedman(
self.omega_matter,
self.omega_lambda,
1.0 - self.omega_matter - self.omega_lambda,
)
age = self.parameters["time"]
iage = 1 + int(10.0 * age / self.dtau)
iage = np.min(
[iage, self.n_frw // 2 + (iage - self.n_frw // 2) // 10])
try:
self.time_simu = self.t_frw[iage] * (
age - self.tau_frw[iage - 1]) / (
self.tau_frw[iage] - self.tau_frw[iage - 1]
) + self.t_frw[iage - 1] * (age - self.tau_frw[iage]) / (
self.tau_frw[iage - 1] - self.tau_frw[iage])
self.current_time = ((self.time_tot + self.time_simu) /
(self.hubble_constant * 1e7 / 3.08e24) /
self.parameters["unit_t"])
except IndexError:
mylog.warning(
"Yt could not convert conformal time to physical time. "
"Yt will assume the simulation is *not* cosmological.")
self.cosmological_simulation = 0
self.current_time = self.parameters["time"]
if self.num_groups > 0:
self.group_size = rheader["ncpu"] // self.num_groups
# Read namelist.txt file (if any)
self.read_namelist()
def _parse_parameter_file(self):
# hardcoded for now
# These should be explicitly obtained from the file, but for now that
# will wait until a reorganization of the source tree and better
# generalization.
self.dimensionality = 3
self.refine_by = 2
self.parameters["HydroMethod"] = 'ramses'
self.parameters["Time"] = 1. # default unit is 1...
self.unique_identifier = \
int(os.stat(self.parameter_filename)[stat.ST_CTIME])
# We now execute the same logic Oliver's code does
rheader = {}
def read_rhs(f, cast):
line = f.readline().replace('\n', '')
p, v = line.split("=")
rheader[p.strip()] = cast(v.strip())
with open(self.parameter_filename) as f:
for i in range(6):
read_rhs(f, int)
f.readline()
for i in range(11):
read_rhs(f, float)
f.readline()
read_rhs(f, str)
# This next line deserves some comment. We specify a min_level that
# corresponds to the minimum level in the RAMSES simulation. RAMSES is
# one-indexed, but it also does refer to the *oct* dimensions -- so
# this means that a levelmin of 1 would have *1* oct in it. So a
# levelmin of 2 would have 8 octs at the root mesh level.
self.min_level = rheader['levelmin'] - 1
# Now we read the hilbert indices
self.hilbert_indices = {}
if rheader['ordering type'] == "hilbert":
f.readline() # header
for n in range(rheader['ncpu']):
dom, mi, ma = f.readline().split()
self.hilbert_indices[int(dom)] = (float(mi), float(ma))
if rheader['ordering type'] != 'hilbert' and self.bbox:
raise NotImplementedError(
'The ordering %s is not compatible with the `bbox` argument.' %
rheader['ordering type'])
self.parameters.update(rheader)
self.domain_left_edge = np.zeros(3, dtype='float64')
self.domain_dimensions = np.ones(3, dtype='int32') * \
2**(self.min_level+1)
self.domain_right_edge = np.ones(3, dtype='float64')
# This is likely not true, but it's not clear how to determine the boundary conditions
self.periodicity = (True, True, True)
if self.force_cosmological is not None:
is_cosmological = self.force_cosmological
else:
# These conditions seem to always be true for non-cosmological datasets
is_cosmological = not (rheader["time"] >= 0 and rheader["H0"] == 1
and rheader["aexp"] == 1)
if not is_cosmological:
self.cosmological_simulation = 0
self.current_redshift = 0
self.hubble_constant = 0
self.omega_matter = 0
self.omega_lambda = 0
else:
self.cosmological_simulation = 1
self.current_redshift = (1.0 / rheader["aexp"]) - 1.0
self.omega_lambda = rheader["omega_l"]
self.omega_matter = rheader["omega_m"]
self.hubble_constant = rheader["H0"] / 100.0 # This is H100
self.max_level = rheader['levelmax'] - self.min_level - 1
if self.cosmological_simulation == 0:
self.current_time = self.parameters['time']
else:
self.tau_frw, self.t_frw, self.dtau, self.n_frw, self.time_tot = \
friedman( self.omega_matter, self.omega_lambda, 1. - self.omega_matter - self.omega_lambda )
age = self.parameters['time']
iage = 1 + int(10. * age / self.dtau)
iage = np.min(
[iage, self.n_frw // 2 + (iage - self.n_frw // 2) // 10])
self.time_simu = self.t_frw[iage ]*(age-self.tau_frw[iage-1])/(self.tau_frw[iage]-self.tau_frw[iage-1])+ \
self.t_frw[iage-1]*(age-self.tau_frw[iage ])/(self.tau_frw[iage-1]-self.tau_frw[iage])
self.current_time = (self.time_tot + self.time_simu) / (
self.hubble_constant * 1e7 /
3.08e24) / self.parameters['unit_t']
if self.num_groups > 0:
self.group_size = rheader['ncpu'] // self.num_groups
