mirror of
https://github.com/Richard-Sti/csiborgtools.git
synced 2024-10-18 20:15:05 +02:00
1d847cbd06
* Rename paths object * Remove redshift calculation * Explicit keywrod arg * Rename box units * Basic renaming * Little docs * Rename paths * add imports * Sort imports * Add Quijote cat * Split boxes * add Quijote path * Add origin argument * Update nbs
83 lines
2.9 KiB
Python
83 lines
2.9 KiB
Python
# Copyright (C) 2022 Richard Stiskalek
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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"""
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Script to sort the initial snapshot particles according to their final
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snapshot ordering, which is sorted by the clump IDs.
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"""
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from argparse import ArgumentParser
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from datetime import datetime
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from gc import collect
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import h5py
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import numpy
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from mpi4py import MPI
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try:
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import csiborgtools
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except ModuleNotFoundError:
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import sys
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sys.path.append("../")
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import csiborgtools
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# Get MPI things
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comm = MPI.COMM_WORLD
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rank = comm.Get_rank()
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nproc = comm.Get_size()
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verbose = nproc == 1
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# Argument parser
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parser = ArgumentParser()
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parser.add_argument("--ics", type=int, nargs="+", default=None,
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help="IC realisations. If `-1` processes all simulations.")
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args = parser.parse_args()
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paths = csiborgtools.read.Paths(**csiborgtools.paths_glamdring)
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partreader = csiborgtools.read.ParticleReader(paths)
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# NOTE: ID has to be the last column.
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pars_extract = ["x", "y", "z", "M", "ID"]
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if args.ics is None or args.ics[0] == -1:
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ics = paths.get_ics()
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else:
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ics = args.ics
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# We loop over simulations. Each simulation is then procesed with MPI, rank 0
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# loads the data and broadcasts it to other ranks.
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jobs = csiborgtools.fits.split_jobs(len(ics), nproc)[rank]
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for i in jobs:
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nsim = ics[i]
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nsnap = max(paths.get_snapshots(nsim))
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print(f"{datetime.now()}: reading and processing simulation {nsim}.",
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flush=True)
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# We first load the particle IDs in the final snapshot.
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pidf = csiborgtools.read.read_h5(paths.particles_path(nsim))
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pidf = pidf["particle_ids"]
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# Then we load the particles in the initil snapshot and make sure that
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# their particle IDs are sorted as in the final snapshot.
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# Again, because of precision this must be read as structured.
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part0, pid0 = partreader.read_particle(
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1, nsim, pars_extract, return_structured=False, verbose=verbose)
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# First enforce them to already be sorted and then apply reverse
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# sorting from the final snapshot.
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part0 = part0[numpy.argsort(pid0)]
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del pid0
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collect()
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part0 = part0[numpy.argsort(numpy.argsort(pidf))]
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print(f"{datetime.now()}: dumping particles for {nsim}.", flush=True)
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with h5py.File(paths.initmatch_path(nsim, "particles"), "w") as f:
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f.create_dataset("particles", data=part0)
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