def __init__(self, *args, **results):
"""Save energy, forces, stress, ... for the current configuration."""
if args and isinstance(args[0], float):
# Old interface:
assert not results
for key, value in zip(['energy', 'forces', 'stress', 'magmoms'],
args):
if value is not None:
results[key] = value
atoms = args[-1]
else:
if args:
atoms = args[0]
else:
atoms = results.pop('atoms')
Calculator.__init__(self)
self.results = {}
for property, value in results.items():
assert property in all_properties
if value is None:
continue
if property in ['energy', 'magmom']:
self.results[property] = value
else:
self.results[property] = np.array(value, float)
self.atoms = atoms.copy()
def run_calculation(self, atoms=None, properties=None,
system_changes=all_changes):
'''
Internal calculation executor. We cannot use FileIOCalculator
directly since we need to support remote execution.
This calculator is different from others.
It prepares the directory, launches the remote process and
raises the exception to signal that we need to come back for results
when the job is finished.
'''
if properties is None:
properties = ['energy']
Calculator.calculate(self, atoms, properties, system_changes)
self.write_input(self.atoms, properties, system_changes)
if self.command is None:
raise RuntimeError('Please configure RemoteQE calculator!')
olddir = os.getcwd()
errorcode=0
try:
os.chdir(self.directory)
output = subprocess.check_output(self.command, shell=True)
self.jobid=output.split()[0]
self.submited=True
#print "Job %s submitted. Waiting for it." % (self.jobid)
# Waiting loop. To be removed.
except subprocess.CalledProcessError as e:
errorcode=e.returncode
finally:
os.chdir(olddir)
if errorcode:
raise RuntimeError('%s returned an error: %d' %
(self.name, errorcode))
self.read_results()
def __init__(self, calculator, db='checkpoints.db', logfile=None):
Calculator.__init__(self)
self.calculator = calculator
if logfile is None:
logfile = DevNull()
self.checkpoint = Checkpoint(db, logfile)
self.logfile = logfile
def calculate(self, atoms, properties, system_changes):
"""
Calculation of the energy of system and forces of all atoms.
"""
# The inherited method below just sets the atoms object,
# if specified, to self.atoms.
Calculator.calculate(self, atoms, properties, system_changes)
log = self.log
log('Calculation requested.')
images = hash_images([self.atoms])
key = images.keys()[0]
if properties == ['energy']:
log('Calculating potential energy...', tic='pot-energy')
self.descriptor.calculate_fingerprints(images=images,
log=log,
calculate_derivatives=False)
energy = self.model.get_energy(self.descriptor.fingerprints[key])
self.results['energy'] = energy
log('...potential energy calculated.', toc='pot-energy')
if properties == ['forces']:
log('Calculating forces...', tic='forces')
self.descriptor.calculate_fingerprints(images=images,
log=log,
calculate_derivatives=True)
forces = \
self.model.get_forces(self.descriptor.fingerprints[key],
self.descriptor.fingerprintprimes[key])
self.results['forces'] = forces
log('...forces calculated.', toc='forces')
def __init__(self, restart=None, ignore_bad_restart_file=False, label=None,
atoms=None, calc=None, block=False, **kwargs):
'''Basic calculator implementation.
restart: str
Prefix for restart file. May contain a directory. Default
is None: don't restart.
ignore_bad_restart_file: bool
Ignore broken or missing restart file. By default, it is an
error if the restart file is missing or broken.
label: str
Name used for all files. May contain a directory.
atoms: Atoms object
Optional Atoms object to which the calculator will be
attached. When restarting, atoms will get its positions and
unit-cell updated from file.
Create a remote execution calculator based on actual ASE calculator
calc.
'''
logging.debug("Calc: %s Label: %s" % (calc, label))
Calculator.__init__(self, restart, ignore_bad_restart_file, label, atoms, **kwargs)
logging.debug("Dir: %s Ext: %s" % (self.directory, self.ext))
self.calc=calc
self.jobid=None
self.block=block
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
try:
results = self.checkpoint.load(atoms)
prev_atoms, results = results[0], results[1:]
try:
assert atoms_almost_equal(atoms, prev_atoms)
except AssertionError:
raise AssertionError('mismatch between current atoms and those read from checkpoint file')
self.logger.pr('retrieved results for {0} from checkpoint'.format(properties))
# save results in calculator for next time
if isinstance(self.calculator, Calculator):
if not hasattr(self.calculator, 'results'):
self.calculator.results = {}
self.calculator.results.update(dict(zip(properties, results)))
except NoCheckpoint:
if isinstance(self.calculator, Calculator):
self.logger.pr('doing calculation of {0} with new-style calculator interface'.format(properties))
self.calculator.calculate(atoms, properties, system_changes)
results = [self.calculator.results[prop] for prop in properties]
else:
self.logger.pr('doing calculation of {0} with old-style calculator interface'.format(properties))
results = []
for prop in properties:
method_name = CheckpointCalculator.property_to_method_name[prop]
method = getattr(self.calculator, method_name)
results.append(method(atoms))
_calculator = atoms.get_calculator
try:
atoms.set_calculator(self.calculator)
self.checkpoint.save(atoms, *results)
finally:
atoms.set_calculator(_calculator)
self.results = dict(zip(properties, results))
def relax(self, atoms=None, properties=['energy'],
system_changes=some_changes,
flag_damping=2,
converge_eps=1.0e-3,nsteps=100,min_iteration=5,
converge_num=3,time_interval=2.0,
initial_temperature=10.0):
"""
Relax atom positions by running damped MD in pmd instead of using
optimize module in ASE.
"""
self.set(flag_damping=flag_damping,
converge_eps=converge_eps,
num_iteration=nsteps,
min_iteration=min_iteration,
num_out_energy=nsteps,
converge_num=converge_num,
time_interval=time_interval,
initial_temperature=initial_temperature,
flag_sort=1)
Calculator.calculate(self, atoms, properties, system_changes)
# print 'type(atoms),type(self.atoms)= ',type(atoms),type(self.atoms)
# print 'self.atoms = ',self.atoms
self.write_input(self.atoms, properties, system_changes)
olddir = os.getcwd()
try:
os.chdir(self.directory)
errorcode = subprocess.call(self.command, shell=True)
finally:
os.chdir(olddir)
if errorcode:
raise RuntimeError('%s returned an error: %d' %
(self.name, errorcode))
self.read_results(relax=True)
def calculate(self, atoms=None, properties=['energy'],
system_changes=all_changes):
# We don't call FileIOCalculator.calculate here, because that method
# calls subprocess.call(..., shell=True), which we don't want to do.
# So, we reproduce some content from that method here.
Calculator.calculate(self, atoms, properties, system_changes)
# If a parameter file exists in the working directory, delete it
# first. If we need that file, we'll recreate it later.
localparfile = os.path.join(self.directory, '.dftd3par.local')
if os.path.isfile(localparfile):
os.remove(localparfile)
# Write XYZ or POSCAR file and .dftd3par.local file if we are using
# custom damping parameters.
self.write_input(self.atoms, properties, system_changes)
command = self._generate_command()
# Finally, call dftd3 and parse results.
with open(self.label + '.out', 'w') as f:
errorcode = subprocess.call(command, cwd=self.directory, stdout=f)
if errorcode:
raise RuntimeError('%s returned an error: %d' %
(self.name, errorcode))
self.read_results()
def __init__(self, morses=None, bonds=None, angles=None, dihedrals=None,
vdws=None, coulombs=None, **kwargs):
Calculator.__init__(self, **kwargs)
if (morses is None and
bonds is None and
angles is None and
dihedrals is None and
vdws is None and
coulombs is None):
raise ImportError("At least one of morses, bonds, angles, dihedrals,"
"vdws or coulombs lists must be defined!")
if morses is None:
self.morses = []
else:
self.morses = morses
if bonds is None:
self.bonds = []
else:
self.bonds = bonds
if angles is None:
self.angles = []
else:
self.angles = angles
if dihedrals is None:
self.dihedrals = []
else:
self.dihedrals = dihedrals
if vdws is None:
self.vdws = []
else:
self.vdws = vdws
if coulombs is None:
self.coulombs = []
else:
self.coulombs = coulombs
def calculate(self, atoms=None, properties=['energy'],
system_changes=None):
"""Runs a calculation, only if necessary."""
if self.calculation_required(atoms, properties):
# The subclass implementation should first call this
# implementation to set the atoms attribute.
Calculator.calculate(self, atoms, properties, system_changes)
self.write_input(atoms, properties, system_changes)
if self.command is None:
raise RuntimeError('Please set $%s environment variable ' %
('ASE_' + self.name.upper() + '_COMMAND') +
'or supply the command keyword')
olddir = os.getcwd()
try:
os.chdir(self.directory)
errorcode = subprocess.call(self.command,
stdout=subprocess.PIPE,
shell=True)
finally:
os.chdir(olddir)
if errorcode:
s = '{} returned an error: {}'
raise RuntimeError(s.format(self.name, errorcode))
# This sets self.results, and updates the atoms
self.read_results()
def calculate(self, atoms=None, properties=['energy'],
system_changes=all_changes):
"""EAM Calculator
atoms: Atoms object
Contains positions, unit-cell, ...
properties: list of str
List of what needs to be calculated. Can be any combination
of 'energy', 'forces'
system_changes: list of str
List of what has changed since last calculation. Can be
any combination of these five: 'positions', 'numbers', 'cell',
'pbc', 'initial_charges' and 'initial_magmoms'.
"""
Calculator.calculate(self, atoms, properties, system_changes)
# we shouldn't really recalc if charges or magmos change
if len(system_changes) > 0: # something wrong with this way
self.update(self.atoms)
self.calculate_energy(self.atoms)
if 'forces' in properties:
self.calculate_forces(self.atoms)
# check we have all the properties requested
for property in properties:
if property not in self.results:
if property is 'energy':
self.calculate_energy(self.atoms)
if property is 'forces':
self.calculate_forces(self.atoms)
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
if self.qmatoms is None:
self.initialize_qm(atoms)
self.qmatoms.positions = atoms.positions[self.selection]
if self.vacuum:
self.qmatoms.positions += (self.center -
self.qmatoms.positions.mean(axis=0))
energy = self.mmcalc2.get_potential_energy(atoms)
forces = self.mmcalc2.get_forces(atoms)
energy += self.qmcalc.get_potential_energy(self.qmatoms)
qmforces = self.qmcalc.get_forces(self.qmatoms)
if self.vacuum:
qmforces -= qmforces.mean(axis=0)
forces[self.selection] += qmforces
energy -= self.mmcalc1.get_potential_energy(self.qmatoms)
forces[self.selection] -= self.mmcalc1.get_forces(self.qmatoms)
self.results['energy'] = energy
self.results['forces'] = forces
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
if system_changes: # if anything at all changed (could be made more fine-grained)
self.logger.pr('calculation triggered with properties={0}, system_changes={1}'.format(properties,
system_changes))
self.server.put(atoms, 0, self.label)
if self.label != 1:
# send atoms over socket, unless first time
self.logger.pr('socket calculator sending Atoms label={0}'.format(self.label))
self.server.handle_request()
# wait for results to be ready
self.logger.pr('socket calculator waiting for results label={0}'.format(self.label))
self.server.handle_request()
self.label += 1
[results] = self.server.get_results()
# we always compute energy, forces and stresses, regardless of what was requested
stress = -(results.info['virial']/results.get_volume())
self.results = {'energy': results.info['energy'],
'forces': results.arrays['force'],
'stress': full_3x3_to_Voigt_6_stress(stress)}
else:
self.logger.pr('calculation avoided with properties={0}, system_changes={1}'.format(properties,
system_changes))
def __init__(self,
hirshfeld=None, vdwradii=None, calculator=None,
Rmax = 10, # maximal radius for periodic calculations
vdWDB_alphaC6 = vdWDB_alphaC6,
txt=None,
):
"""Constructor
Parameters
==========
hirshfeld: the Hirshfeld partitioning object
calculator: the calculator to get the PBE energy
"""
self.hirshfeld = hirshfeld
if calculator is None:
self.calculator = self.hirshfeld.get_calculator()
else:
self.calculator = calculator
if txt is None:
self.txt = self.calculator.txt
else:
self.txt = get_txt(txt, rank)
self.vdwradii = vdwradii
self.vdWDB_alphaC6 = vdWDB_alphaC6
self.Rmax = Rmax
self.atoms = None
self.sR = 0.94
self.d = 20
Calculator.__init__(self)
def __init__(self, restart=None, ignore_bad_restart_file=False, label=None,
atoms=None, k=10, rt=1.5, sp_type='rep', **kwargs):
Calculator.__init__(self, restart, ignore_bad_restart_file,
label, atoms, **kwargs)
# Common parameters to all springs
self.sp_type = sp_type
self.k = k
self.rt = rt
# Depending on the spring type use different kernels
self.nrg_func = spring_nrg
self.f_func = spring_force
self.v_nrg = voxel_spring_nrg
self.atomwise_nrg = atomwise_spring_nrg
if sp_type == 'com':
self.nrg_func = com_spring_nrg
self.f_func = com_spring_force
self.v_nrg = voxel_com_spring_nrg
self.atomwise_nrg = atomwise_com_spring_nrg
if sp_type == 'att':
self.nrg_func = att_spring_nrg
self.f_func = att_spring_force
self.v_nrg = voxel_att_spring_nrg
self.atomwise_nrg = atomwise_att_spring_nrg
def __init__(self, f, cutoff=None):
Calculator.__init__(self)
self.f = f
self.dict = {x: obj.get_cutoff() for x, obj in f.items()}
self.df = {x: obj.derivative(1) for x, obj in f.items()}
self.df2 = {x: obj.derivative(2) for x, obj in f.items()}
def calculate(self, atoms=None, properties=['energy'],
system_changes=['positions', 'numbers', 'cell',
'pbc', 'charges', 'magmoms']):
Calculator.calculate(self, atoms, properties, system_changes)
epsilon = self.parameters.epsilon
rho0 = self.parameters.rho0
r0 = self.parameters.r0
positions = self.atoms.get_positions()
energy = 0.0
energies = np.zeros(len(self.atoms))
forces = np.zeros((len(self.atoms), 3))
preF = 2 * epsilon * rho0 / r0
for i1, p1 in enumerate(positions):
for i2, p2 in enumerate(positions[:i1]):
diff = p2 - p1
r = sqrt(np.dot(diff, diff))
expf = exp(rho0 * (1.0 - r / r0))
energy += epsilon * expf * (expf - 2)
energies[i1] += epsilon * expf * (expf - 2)
energies[i2] += epsilon * expf * (expf - 2)
F = preF * expf * (expf - 1) * diff / r
forces[i1] -= F
forces[i2] += F
self.results['energy'] = energy
self.results['forces'] = forces
self.results['potential_energies'] = energies
def calculate(self, atoms=None, properties=['energy'],
system_changes=all_changes):
"""GEBF Calculator
"""
Calculator.calculate(self, atoms, properties, system_changes)
if len(system_changes) > 0: # something wrong with this way
self.update(self.atoms)
if 'energy' in properties:
self.calculate_energy(self.atoms)
if 'forces' in properties:
self.calculate_forces(self.atoms)
if 'charges' in properties:
self.calculate_charges(self.atoms)
# check we have all the properties requested
for property in properties:
if property not in self.results:
if property is 'energy':
self.calculate_energy(self.atoms)
if property is 'forces':
self.calculate_forces(self.atoms)
if property is 'charges':
self.calculate_charges(self.atoms)
#FUMPORTANT|
atoms.set_initial_charges(self.results['charges'])
def calculate(self, atoms, properties, system_changes):
# call parent method:
Calculator.calculate(self, atoms, properties, system_changes)
if not(system_changes is None):
self.update_atoms()
if 'energy' in properties:
energy = self.ff.Energy()
# energy units are kcal/mole according to http://forums.openbabel.org/Energy-units-td1574278.html
# and in Avogadro they are reported as kJ/mole ...
self.results['energy'] = energy * units.kJ / units.mol
if 'forces' in properties:
d = 0.001
F_ai = np.zeros( (self.natoms, 3) )
for iatom in xrange( self.natoms ):
for iaxis in xrange( 3 ):
obatom = self.mol.GetAtom( 1 + iatom )
vec = obatom.GetVector()
obatom.SetVector( self._shift_OBvec(vec, iaxis, d) )
self.ff.Setup( self.mol )
eplus = self.ff.Energy() * units.kJ/units.mol
obatom.SetVector( self._shift_OBvec(vec, iaxis, -2*d) )
self.ff.Setup( self.mol )
eminus = self.ff.Energy() * units.kJ/units.mol
obatom.SetVector( self._shift_OBvec(vec, iaxis, d) ) # put it back
F_ai[iatom, iaxis] = (eminus - eplus) / (2 * d)
self.results['forces'] = F_ai
def calculate(self, atoms=None, properties=None,
system_changes=all_changes):
'''Do the calculation.'''
if(not properties):
properties = ['energy']
Calculator.calculate(self, atoms, properties, system_changes)
if('numbers' in system_changes or
'initial_magmoms' in system_changes):
self._release_force_env()
if(self._force_env_id is None):
self._create_force_env()
n_atoms = len(self.atoms)
if('cell' in system_changes):
cell = self.atoms.get_cell()
self._send('SET_CELL %d' % self._force_env_id)
self._send(' '.join(['%.10f' % x for x in cell.flat]))
assert(self._recv() == '* READY')
if('positions' in system_changes):
self._send('SET_POS %d' % self._force_env_id)
self._send('%d' % (3 * n_atoms))
for pos in self.atoms.get_positions():
self._send('%.10f %.10f %.10f' % (pos[0], pos[1], pos[2]))
self._send('*END')
assert(float(self._recv()) >= 0) # max change -> ignore
assert(self._recv() == '* READY')
self._send('EVAL_EF %d' % self._force_env_id)
assert(self._recv() == '* READY')
self._send('GET_E %d' % self._force_env_id)
self.results['energy'] = float(self._recv()) * Hartree
assert(self._recv() == '* READY')
forces = np.zeros(shape=(n_atoms, 3))
self._send('GET_F %d' % self._force_env_id)
assert(int(self._recv()) == 3 * n_atoms)
for i in range(n_atoms):
line = self._recv()
forces[i, :] = [float(x) for x in line.split()]
assert(self._recv() == '* END')
assert(self._recv() == '* READY')
self.results['forces'] = forces * Hartree / Bohr
self._send('GET_STRESS %d' % self._force_env_id)
line = self._recv()
assert(self._recv() == '* READY')
stress = np.array([float(x) for x in line.split()]).reshape(3, 3)
assert(np.all(stress == np.transpose(stress))) # should be symmetric
# Convert 3x3 stress tensor to Voigt form as required by ASE
stress = np.array([stress[0, 0], stress[1, 1], stress[2, 2],
stress[1, 2], stress[0, 2], stress[0, 1]])
self.results['stress'] = stress * Hartree / Bohr**3
def __init__(self, restart=None, ignore_bad_restart_file=False,
label='cp2k', atoms=None, command=None,
debug=False, **kwargs):
"""Construct CP2K-calculator object."""
self._debug = debug
self._force_env_id = None
self._child = None
self._shell_version = None
self.label = None
self.parameters = None
self.results = None
self.atoms = None
# Several places are check to determine self.command
if command is not None:
self.command = command
elif CP2K.command is not None:
self.command = CP2K.command
elif 'ASE_CP2K_COMMAND' in os.environ:
self.command = os.environ['ASE_CP2K_COMMAND']
else:
self.command = 'cp2k_shell' # default
assert 'cp2k_shell' in self.command
Calculator.__init__(self, restart, ignore_bad_restart_file,
label, atoms, **kwargs)
# launch cp2k_shell child process
if self._debug:
print(self.command)
self._child = Popen(self.command, shell=True, universal_newlines=True,
stdin=PIPE, stdout=PIPE, bufsize=1)
assert self._recv() == '* READY'
# check version of shell
self._send('VERSION')
shell_version = self._recv().rsplit(":", 1)
assert self._recv() == '* READY'
assert shell_version[0] == "CP2K Shell Version"
self._shell_version = float(shell_version[1])
assert self._shell_version >= 1.0
# enable harsh mode, stops on any error
self._send('HARSH')
assert self._recv() == '* READY'
if restart is not None:
try:
self.read(restart)
except:
if ignore_bad_restart_file:
self.reset()
else:
raise
def __init__(self, restart=None, ignore_bad_restart_file=False, label=None,
atoms=None, **kwargs):
"""Accepted Keypairs
calculation:
str - only scf[default] supported at the moment
ecutwfc:
plane wave cuttoff [eV] notice not in Ry!
nbands:
number of bands for calculation (see pw.x -> nbnd)
usesymm:
whether or not to use symmetry in calculation (True/False)
maxiter:
maximum number of iterations in an scf step
convergence:
{'energy', <value>} - only one implemented
kpts:
(1, 1, 1) - gamma point
(n1, n2, n3) - Morstead Packing
[[k1, k2, k3] ... ] - List of kpoints
prefix: (self.label is meaningless at moment)
str - string to append to output files
pseudo:
{'atom symbol': 'name of pseudo potential', ...} - dictionary of pseudo per atom
outdir:
str - relative or absolute path to output directory.
Will create it if it does not exist.
pseudo_dir:
str - relative or absolute path to pseudo directory.
occupations:
str - 'smearing', 'tetrahedra', 'fixed', 'from_input'
input_dft:
str - functional to use
fft_mesh:
[nr1, nr2, nr3] - fft mesh to use for calculation
keypairs:
way to initialize via the base class PWBase.
(DO NOT SET CELL OR ATOM POSITIONS via PWBase this is done
automagically via ASE Atoms)
debug:
if True will print input and output QE files
AUTOMATICALLY SET KEYPAIRS:
Set so we can always extract stress and forces:
control.tstress=True
control.tprnfor=True
From atoms object:
CARD 'CELL PARAMETERS (angstroms)' from atoms.cell
CARD 'ATOMIC POSITIONS (angstroms)' from atoms[i]
system.nat from number of unique atoms in atoms[i]
system.ntyp from len(atoms)
Thus DO NOT SET:
A, B, C, cosAB, cosBC, cosAC, celldm(1-6)
or any of these previously mentioned. Be smart
"""
Calculator.__init__(self, restart, ignore_bad_restart_file, label, atoms, **kwargs)
self._pw = None
def __init__(self, atoms=None, label=None, top=None, crd=None,
mm_options=None, qm_options=None, permutation=None, **kwargs):
if not have_sander:
raise RuntimeError("sander Python module could not be imported!")
Calculator.__init__(self, label, atoms)
self.permutation = permutation
if qm_options is not None:
sander.setup(top, crd.coordinates, crd.box, mm_options, qm_options)
else:
sander.setup(top, crd.coordinates, crd.box, mm_options)
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms)
self.kpts = kpts2ndarray(self.parameters.kpts, atoms)
icell = atoms.get_reciprocal_cell() * 2 * np.pi * Bohr
n = 7
offsets = np.indices((n, n, n)).T.reshape((n**3, 1, 3)) - n // 2
eps = 0.5 * (np.dot(self.kpts + offsets, icell)**2).sum(2).T
eps.sort()
self.eigenvalues = eps[:, :20] * Ha
self.results = {'energy': 0.0}
def calculate(self, atoms=None,
properties=['energy'],
system_changes=all_changes):
Calculator.calculate(self, atoms, properties, system_changes)
natoms = len(self.atoms)
sigma = self.parameters.sigma
epsilon = self.parameters.epsilon
rc = self.parameters.rc
if rc is None:
rc = 3 * sigma
if 'numbers' in system_changes:
self.nl = NeighborList([rc / 2] * natoms, self_interaction=False)
self.nl.update(self.atoms)
positions = self.atoms.positions
cell = self.atoms.cell
e0 = 4 * epsilon * ((sigma / rc)**12 - (sigma / rc)**6)
energy = 0.0
forces = np.zeros((natoms, 3))
stress = np.zeros((3, 3))
for a1 in range(natoms):
neighbors, offsets = self.nl.get_neighbors(a1)
cells = np.dot(offsets, cell)
d = positions[neighbors] + cells - positions[a1]
r2 = (d**2).sum(1)
c6 = (sigma**2 / r2)**3
c6[r2 > rc**2] = 0.0
energy -= e0 * (c6 != 0.0).sum()
c12 = c6**2
energy += 4 * epsilon * (c12 - c6).sum()
f = (24 * epsilon * (2 * c12 - c6) / r2)[:, np.newaxis] * d
#print d
#print r2**.5
#print offsets
#print f
#print neighbors
forces[a1] -= f.sum(axis=0)
for a2, f2 in zip(neighbors, f):
forces[a2] += f2
stress += np.dot(f.T, d)
#stress = np.dot(stress, cell)
stress += stress.T.copy()
stress *= -0.5 / self.atoms.get_volume()
self.results['energy'] = energy
self.results['forces'] = forces
self.results['stress'] = stress.flat[[0, 4, 8, 5, 2, 1]]
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
nat = len(self.atoms)
atnums = self.atoms.numbers
atnums_in_system = set(atnums)
i_n, j_n, dr_nc, abs_dr_n = neighbour_list(
'ijDd', self.atoms, self.dict)
e_n = np.zeros_like(abs_dr_n)
de_n = np.zeros_like(abs_dr_n)
for params, pair in enumerate(self.dict):
if pair[0] == pair[1]:
mask1 = atnums[i_n] == pair[0]
mask2 = atnums[j_n] == pair[0]
mask = np.logical_and(mask1, mask2)
e_n[mask] = self.f[pair](abs_dr_n[mask])
de_n[mask] = self.df[pair](abs_dr_n[mask])
if pair[0] != pair[1]:
mask1 = np.logical_and(
atnums[i_n] == pair[0], atnums[j_n] == pair[1])
mask2 = np.logical_and(
atnums[i_n] == pair[1], atnums[j_n] == pair[0])
mask = np.logical_or(mask1, mask2)
e_n[mask] = self.f[pair](abs_dr_n[mask])
de_n[mask] = self.df[pair](abs_dr_n[mask])
epot = 0.5*np.sum(e_n)
# Forces
df_nc = -0.5*de_n.reshape(-1, 1)*dr_nc/abs_dr_n.reshape(-1, 1)
# Sum for each atom
fx_i = np.bincount(j_n, weights=df_nc[:, 0], minlength=nat) - \
np.bincount(i_n, weights=df_nc[:, 0], minlength=nat)
fy_i = np.bincount(j_n, weights=df_nc[:, 1], minlength=nat) - \
np.bincount(i_n, weights=df_nc[:, 1], minlength=nat)
fz_i = np.bincount(j_n, weights=df_nc[:, 2], minlength=nat) - \
np.bincount(i_n, weights=df_nc[:, 2], minlength=nat)
# Virial
virial_v = -np.array([dr_nc[:, 0]*df_nc[:, 0], # xx
dr_nc[:, 1]*df_nc[:, 1], # yy
dr_nc[:, 2]*df_nc[:, 2], # zz
dr_nc[:, 1]*df_nc[:, 2], # yz
dr_nc[:, 0]*df_nc[:, 2], # xz
dr_nc[:, 0]*df_nc[:, 1]]).sum(axis=1) # xy
self.results = {'energy': epot,
'stress': virial_v/self.atoms.get_volume(),
'forces': np.transpose([fx_i, fy_i, fz_i])}
def __init__(self, calculator, jsonfile=None, dumpjson=False):
Calculator.__init__(self)
self.calculator = calculator
self.fmax = {}
self.walltime = {}
self.energy_evals = {}
self.energy_count = {}
self.set_label('(none)')
if jsonfile is not None:
self.read_json(jsonfile)
self.dumpjson = dumpjson
def __init__(self, rc=5.0, width=1.0):
"""TIP3P potential.
rc: float
Cutoff radius for Coulomb part.
width: float
Width for cutoff function for Coulomb part.
"""
self.rc = rc
self.width = width
Calculator.__init__(self)
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
P = atoms.positions
D = np.array([P - p for p in P]) # all distance vectors
d = (D**2).sum(2)**0.5
dd = d - self.target
d.ravel()[::len(d) + 1] = 1 # avoid dividing by zero
d4 = d**4
e = 0.5 * (dd**2 / d4).sum()
f = -2 * ((dd * (1 - 2 * dd / d) / d**5)[..., np.newaxis] * D).sum(0)
self.results = {'energy': e, 'forces': f}
def calculate(self, atoms=None, properties=['energy'],
system_changes=[]):
Calculator.calculate(self, atoms, properties, system_changes)
# only one property allowed
assert(len(properties) == 1)
# make sure we have a water molecule, and identify O, H1, H2
chemical_formula = self.atoms.get_chemical_formula(mode='all')
if chemical_formula == 'OHH':
o = 0
h1= 1
h2 =2
elif chemical_formula == 'HOH':
o = 1
h1= 0
h2 =2
elif chemical_formula == 'HHO':
o = 2
h1= 0
h2 =1
else:
raise RuntimeError("chemical formula '{}' is not a water molecule!".format(chemical_formula))
# compute internal coordinates, both stretch coordinates q1, q2 in [bohr] and theta in radians
pos=atoms.get_positions() / Bohr
#q1_tmp = (pos[h1] - pos[o]) / Bohr
#q2_tmp = (pos[h2] - pos[o]) / Bohr
#
#q1 = np.linalg.norm(q1_tmp)
#q2 = np.linalg.norm(q2_tmp)
#
#q1_norm = q1_tmp / q1
#q2_norm = q2_tmp / q2
#q_norm_sum = q1_norm + q2_norm
#q_norm_sum_norm = q_norm_sum / np.linalg.norm(q_norm_sum)
#
#theta = 2.0 * abs(np.arcsin(np.linalg.norm(np.cross(q1_norm,q_norm_sum_norm))))
q1,q2,theta = get_internal_coords_h2o(pos[o], pos[h1], pos[h2])
if properties[0] == 'energy':
V =0.0
V= h2o_pjt2.pots(q1,q2,theta)
self.results['energy'] = V * Ha
if properties[0] == 'forces':
self.results['forces'] = self.calculate_numerical_forces(atoms, d=0.00000001)
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
if system_changes:
if 'energy' in self.results:
del self.results['energy']
if 'forces' in self.results:
del self.results['forces']
if 'energy' not in self.results:
if self.permutation is None:
crd = np.reshape(atoms.get_positions(), (1, len(atoms), 3))
else:
crd = np.reshape(atoms.get_positions()[self.permutation[0, :]],
(1, len(atoms), 3))
sander.set_positions(crd)
e, f = sander.energy_forces()
self.results['energy'] = e.tot * units.kcal / units.mol
if self.permutation is None:
self.results['forces'] = (np.reshape(np.array(f),
(len(atoms), 3)) *
units.kcal / units.mol)
else:
ff = np.reshape(np.array(f), (len(atoms), 3)) * \
units.kcal / units.mol
self.results['forces'] = ff[self.permutation[1, :]]
if 'forces' not in self.results:
if self.permutation is None:
crd = np.reshape(atoms.get_positions(), (1, len(atoms), 3))
else:
crd = np.reshape(atoms.get_positions()[self.permutation[0, :]],
(1, len(atoms), 3))
sander.set_positions(crd)
e, f = sander.energy_forces()
self.results['energy'] = e.tot * units.kcal / units.mol
if self.permutation is None:
self.results['forces'] = (np.reshape(np.array(f),
(len(atoms), 3)) *
units.kcal / units.mol)
else:
ff = np.reshape(np.array(f), (len(atoms), 3)) * \
units.kcal / units.mol
self.results['forces'] = ff[self.permutation[1, :]]
def __init__(self,
hirshfeld=None, vdwradii=None, calculator=None,
Rmax=10., # maximal radius for periodic calculations
Ldecay=1., # decay length for the smoothing in periodic calculations
vdWDB_alphaC6=vdWDB_alphaC6,
txt=None, sR=None
):
"""Constructor
Parameters
==========
hirshfeld: the Hirshfeld partitioning object
calculator: the calculator to get the PBE energy
"""
self.hirshfeld = hirshfeld
if calculator is None:
self.calculator = self.hirshfeld.get_calculator()
else:
self.calculator = calculator
if txt is None:
txt = get_logging_file_descriptor(self.calculator)
self.txt = convert_string_to_fd(txt)
self.vdwradii = vdwradii
self.vdWDB_alphaC6 = vdWDB_alphaC6
self.Rmax = Rmax
self.Ldecay = Ldecay
self.atoms = None
if sR is None:
try:
xc_name = self.calculator.get_xc_functional()
self.sR = sR_opt[xc_name]
except KeyError:
raise ValueError('Tkatchenko-Scheffler dispersion correction not implemented for %s functional' % xc_name)
else:
self.sR = sR
self.d = 20
Calculator.__init__(self)
def calculate(
self,
atoms=None,
properties=['energy', 'forces'],
system_changes=all_changes,
):
"""Calculates the desired properties for the given AtomsBatch.
Args:
atoms (AtomsBatch): custom Atoms subclass that contains implementation
of neighbor lists, batching and so on. Avoids the use of the Dataset
to calculate using the models created.
properties (list of str): 'energy', 'forces' or both
system_changes (default from ase)
"""
Calculator.calculate(self, atoms, properties, system_changes)
# run model
#atomsbatch = AtomsBatch(atoms)
# batch_to(atomsbatch.get_batch(), self.device)
batch = batch_to(atoms.get_batch(), self.device)
# add keys so that the readout function can calculate these properties
batch['energy'] = []
batch['energy_grad'] = []
prediction = self.model(batch)
# change energy and force to numpy array
energy = prediction['energy'].detach().cpu(
).numpy() * (1 / const.EV_TO_KCAL_MOL)
energy_grad = prediction['energy_grad'].detach(
).cpu().numpy() * (1 / const.EV_TO_KCAL_MOL)
self.results = {
'energy': energy.reshape(-1)
}
if 'forces' in properties:
self.results['forces'] = -energy_grad.reshape(-1, 3)
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
if isinstance(self.calculator, Calculator):
results = [
self.calculator.get_property(prop, atoms)
for prop in properties
]
else:
results = []
for prop in properties:
method_name = self.property_to_method_name[prop]
method = getattr(self.calculator, method_name)
results.append(method(atoms))
if 'energy' in properties or 'energies' in properties:
self.energy_evals.setdefault(self.label, 0)
self.energy_evals[self.label] += 1
try:
energy = results[properties.index('energy')]
except IndexError:
energy = sum(results[properties.index('energies')])
logger.info('energy call count=%d energy=%.3f',
self.energy_evals[self.label], energy)
self.results = dict(zip(properties, results))
if 'forces' in self.results:
fmax = self.fmax.setdefault(self.label, [])
walltime = self.walltime.setdefault(self.label, [])
forces = self.results['forces'].copy()
energy_count = self.energy_count.setdefault(self.label, [])
energy_evals = self.energy_evals.setdefault(self.label, 0)
energy_count.append(energy_evals)
for constraint in atoms.constraints:
constraint.adjust_forces(atoms, forces)
fmax.append(abs(forces).max())
walltime.append(time.time())
logger.info('force call fmax=%.3f', fmax[-1])
if self.dumpjson:
self.write_json('dump.json')
def __init__(self,
fn=None,
atomic_numbers=None,
F=None,
f=None,
rep=None,
cutoff=None,
kind='eam/alloy'):
Calculator.__init__(self)
if fn is not None:
source, parameters, F, f, rep = read_eam(fn, kind=kind)
self._db_atomic_numbers = parameters.atomic_numbers
self._db_cutoff = parameters.cutoff
dr = parameters.distance_grid_spacing
dF = parameters.density_grid_spacing
# Create spline interpolation
self.F = _make_splines(dF, F)
self.f = _make_splines(dr, f)
self.rep = _make_splines(dr, rep)
else:
self._db_atomic_numbers = atomic_numbers
self.F = F
self.f = f
self.rep = rep
self._db_cutoff = cutoff
self.atnum_to_index = -np.ones(np.max(self._db_atomic_numbers) + 1,
dtype=int)
self.atnum_to_index[self._db_atomic_numbers] = \
np.arange(len(self._db_atomic_numbers))
# Derivative of spline interpolation
self.dF = _make_derivative(self.F)
self.df = _make_derivative(self.f)
self.drep = _make_derivative(self.rep)
# Second derivative of spline interpolation
self.ddF = _make_derivative(self.F, n=2)
self.ddf = _make_derivative(self.f, n=2)
self.ddrep = _make_derivative(self.rep, n=2)
def __init__(self,
restart=None,
ignore_bad_restart_file=False,
label='cp2k',
atoms=None,
command=None,
debug=False,
**kwargs):
"""Construct CP2K-calculator object."""
self._debug = debug
self._force_env_id = None
self._shell = None
self.label = None
self.parameters = None
self.results = None
self.atoms = None
# Several places are check to determine self.command
if command is not None:
self.command = command
elif CP2K.command is not None:
self.command = CP2K.command
elif 'ASE_CP2K_COMMAND' in os.environ:
self.command = os.environ['ASE_CP2K_COMMAND']
else:
self.command = 'cp2k_shell' # default
Calculator.__init__(self, restart, ignore_bad_restart_file, label,
atoms, **kwargs)
self._shell = Cp2kShell(self.command, self._debug)
if restart is not None:
try:
self.read(restart)
except:
if ignore_bad_restart_file:
self.reset()
else:
raise
def calculate(self,
atoms=None,
properties=["energy"],
system_changes=all_changes):
"""
Args:
atoms (ase.Atoms): ASE atoms object.
properties (list of str): do not use this, no functionality
system_changes (list of str): List of changes for ASE.
"""
# First call original calculator to set atoms attribute
# (see https://wiki.fysik.dtu.dk/ase/_modules/ase/calculators/calculator.html#Calculator)
Calculator.calculate(self, atoms)
# Convert to schnetpack input format
model_inputs = self.atoms_converter(atoms)
# Call model
model_results = self.model(model_inputs)
results = {}
# Convert outputs to calculator format
if self.model_energy is not None:
if self.model_energy not in model_results.keys():
raise SpkCalculatorError(
"'{}' is not a property of your model. Please "
"check the model "
"properties!".format(self.model_energy))
energy = model_results[self.model_energy].cpu().data.numpy()
results[self.energy] = energy.reshape(-1) * self.energy_units
if self.model_forces is not None:
if self.model_forces not in model_results.keys():
raise SpkCalculatorError(
"'{}' is not a property of your model. Please "
"check the model"
"properties!".format(self.model_forces))
forces = model_results[self.model_forces].cpu().data.numpy()
results[self.forces] = forces.reshape(
(len(atoms), 3)) * self.forces_units
self.results = results
def set(self, **kwargs):
"""Set parameters like set(key1=value1, key2=value2, ...)."""
msg = '"%s" is not a known keyword for the CP2K calculator. ' \
'To access all features of CP2K by means of an input ' \
'template, consider using the "inp" keyword instead.'
for key in kwargs:
if key not in self.default_parameters:
raise CalculatorSetupError(msg % key)
changed_parameters = Calculator.set(self, **kwargs)
if changed_parameters:
self.reset()
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
if system_changes:
self.results = {}
if 'energy' in properties and 'energy' not in self.results:
self.results['energy'] = self.calc.get_potential_energy(atoms)
if 'forces' in properties and 'forces' not in self.results:
raw_forces = self.calc.get_forces(atoms)
self.results['forces'] = symmetrize.forces(
atoms.get_cell(),
atoms.get_reciprocal_cell().T, raw_forces, self.rotations,
self.translations, self.symm_map)
if 'stress' in properties and 'stress' not in self.results:
raw_stress = self.calc.get_stress(atoms)
if len(raw_stress) == 6: # Voigt
raw_stress = voigt_6_to_full_3x3_stress(raw_stress)
symmetrized_stress = symmetrize.stress(
atoms.get_cell(),
atoms.get_reciprocal_cell().T, raw_stress, self.rotations)
self.results['stress'] = full_3x3_to_voigt_6_stress(
symmetrized_stress)
def __init__(self, learner_params, parent_dataset, parent_calc, base_calc,
trainer, n_ensembles, n_cores):
Calculator.__init__(self)
self.n_ensembles = n_ensembles
self.parent_calc = parent_calc
self.base_calc = base_calc
self.calcs = [parent_calc, base_calc]
self.trainer = trainer
self.learner_params = learner_params
self.n_cores = n_cores
self.ensemble_sets, self.parent_dataset = bootstrap_ensemble(
parent_dataset, n_ensembles=n_ensembles)
self.init_training_data()
self.ensemble_calc = make_ensemble(self.ensemble_sets, self.trainer,
self.base_calc, self.refs,
self.n_cores)
self.uncertain_tol = learner_params["uncertain_tol"]
self.parent_calls = 0
self.init_training_data()
def __init__(self,
model=None,
atoms=None,
to_eV=1.0,
properties=['energy', 'forces', 'stress']):
"""PiNN interface with ASE as a calculator
Args:
model: tf.Estimator object
atoms: optional, ase Atoms object
properties: properties to calculate.
the properties to calculate is fixed for each calculator,
to avoid resetting the predictor during get_* calls.
"""
Calculator.__init__(self)
self.implemented_properties = properties
self.model = model
self.pbc = False
self.atoms = atoms
self.predictor = None
self.to_eV = to_eV
def calculate(self,
atoms=None,
properties=['energy'],
system_changes=all_changes):
Calculator.calculate(self, atoms, properties, system_changes)
# calculate energy-subtract
subtract = 0
if self.subtract:
for a in self.atoms:
subtract += self.single_atom_energy(a.symbol)
# single-point calculation
output = self._run(self.atoms)
if output is None:
raise RuntimeError('gaussian calculation failed!')
self.calc = output.calc
self.results = output.calc.results
# set dummy stress
if 'stress' not in self.results:
self.results['stress'] = np.zeros(6)
# subtract single atom energies
self.results['energy'] -= subtract
def calculate(self,
atoms=None,
properties=['energy'],
system_changes=all_changes):
# Calculator essentially does: self.atoms = atoms
Calculator.calculate(self, atoms, properties, system_changes)
has_results = [p in self.results for p in properties]
if (len(system_changes) > 0) or (not np.all(has_results)):
self.update(self.atoms)
if ('energy' in properties) and ('forces' in properties):
# Forces evaluation requires energy. No need to compute
# energy twice.
del properties[properties.index('energy')]
for p in properties:
if p in self.implemented_properties:
self.implemented_properties[p](self.atoms)
else:
raise NotImplementedError(
"Property not implemented: {}".format(p))
def __init__(self, model):
Calculator.__init__(self)
if not os.path.exists("results/trained_models"):
os.mkdir("results/trained_models")
self.save_logs = model.save_logs
label = model.label
self.log = Logger("results/logs/" + label + ".txt")
self.log("Filename: %s" % label)
self.model = model
self.label = "".join(["results/trained_models/", label, ".pt"])
self.fp_scaling = self.model.training_data.fprange
self.target_sd = self.model.scalings[0]
self.target_mean = self.model.scalings[1]
self.lj = self.model.training_data.lj
self.Gs = self.model.training_data.Gs
self.log("Symmetry function parameters: %s" % self.Gs)
if self.lj:
self.fitted_params = self.model.lj_data[3]
self.params_dict = self.model.lj_data[4]
self.lj_model = self.model.lj_data[5]
def _toatoms(self, include_results=False):
if not include_results:
return ase.atoms.Atoms(
self.numbers,
self.positions,
cell=self.cell,
pbc=(self.pbc & np.array([1, 2, 4])).astype(bool),
)
if self.constraints:
print(self.constraints)
constraints = json.loads(self.constraints)
print(constraints)
if len(constraints[0]['kwargs']['indices']) > 0:
constraints = [dict2constraint(d) for d in constraints]
else:
constraints = None
atoms = ase.atoms.Atoms(self.numbers,
self.positions,
cell=self.cell,
pbc=(self.pbc
& np.array([1, 2, 4])).astype(bool),
magmoms=self.initial_magmoms,
charges=self.initial_charges,
tags=self.tags,
masses=self.masses,
momenta=self.momenta,
constraint=constraints)
atoms.info = {}
atoms.info['unique_id'] = self.unique_id
atoms.info['key_value_pairs'] = self.key_value_pairs
data = self.data
if data:
atoms.info['data'] = data
if not self.calculator == "unknown":
params = self.calculator_parameters
atoms.calc = Calculator(self.calculator, **params)
atoms.calc.name = self.calculator
else:
all_properties = [
'energy', 'forces', 'stress', 'dipole', 'charges', 'magmom',
'magmoms', 'free_energy'
]
results = {}
for prop in all_properties:
result = getattr(self, prop, None)
if result is not None:
results[prop] = result
if results:
atoms.calc = SinglePointCalculator(atoms, **results)
atoms.calc.name = getattr(self, 'calculator', 'unknown')
return atoms
def __init__(self,
lmp,
lmpcmds=None,
path='tmp',
lmp_file=None,
ntyp=None,
*args,
**kwargs):
Calculator.__init__(self, *args, **kwargs)
self.lmp = lmp
self.lmp_file = lmp_file
self.folder = path
self.ntyp = ntyp
if not os.path.exists(self.folder):
os.makedirs(self.folder)
self.lammps_data = self.folder + '/data.lammps'
self.lammps_in = self.folder + '/in.lammps'
self.lmpcmds = lmpcmds
self.paras = []
for para in lmpcmds:
self.paras.append(para)
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
try:
results = self.checkpoint.load(atoms)
prev_atoms, results = results[0], results[1:]
try:
assert atoms_almost_equal(atoms, prev_atoms)
except AssertionError:
raise AssertionError('mismatch between current atoms and '
'those read from checkpoint file')
self.logfile.write('retrieved results for {0} from checkpoint\n'
.format(properties))
# save results in calculator for next time
if isinstance(self.calculator, Calculator):
if not hasattr(self.calculator, 'results'):
self.calculator.results = {}
self.calculator.results.update(dict(zip(properties, results)))
except NoCheckpoint:
if isinstance(self.calculator, Calculator):
self.logfile.write('doing calculation of {0} with new-style '
'calculator interface\n'.format(properties))
self.calculator.calculate(atoms, properties, system_changes)
results = [self.calculator.results[prop]
for prop in properties]
else:
self.logfile.write('doing calculation of {0} with old-style '
'calculator interface\n'.format(properties))
results = []
for prop in properties:
method_name = self.property_to_method_name[prop]
method = getattr(self.calculator, method_name)
results.append(method(atoms))
_calculator = atoms.calc
try:
atoms.calc = self.calculator
self.checkpoint.save(atoms, *results)
finally:
atoms.calc = _calculator
self.results = dict(zip(properties, results))
def test_calculator_label():
from ase.calculators.calculator import Calculator
calc = Calculator()
assert calc.directory == '.'
assert calc.prefix is None
assert calc.label is None
calc.label = 'dir/pref'
assert calc.directory == 'dir'
assert calc.prefix == 'pref'
assert calc.label == 'dir/pref'
calc.label = 'dir2/'
assert calc.directory == 'dir2'
assert calc.prefix is None
assert calc.label == 'dir2/'
calc.label = 'hello'
assert calc.directory == '.'
assert calc.prefix == 'hello'
assert calc.label == 'hello'
calc.label = None
assert calc.label is None
assert calc.prefix is None
assert calc.directory == '.'
def __init__(self, restart=None, ignore_bad_restart_file=False,
label='pmd', atoms=None,
command='pmd > out.pmd',
dimension=(True,True,True),
specorder=None, **kwargs):
"""Construct PMD-calculator object.
Parameters
==========
label: str
Prefix to use for filenames (in.label, erg.label, ...).
Default is 'pmd'.
Examples
========
Use default values:
>>> h = Atoms('H', calculator=PMD(label='pmd',force_type='NN'))
>>> e = h.get_potential_energy()
"""
Calculator.__init__(self, restart, ignore_bad_restart_file,
label, atoms, **kwargs)
if label not in ['pmd']:
raise RuntimeError('label must be pmd.')
if self.parameters['force_type'] is None:
raise RuntimeError('force_type must be specified.')
if command is None:
self.command = self.label+' > out.'+self.label
elif '>' in command:
self.command = command.split('>')[0] +' > out.'+self.label
else:
self.command = command +' > out.'+self.label
self.specorder= specorder
self.dimension = dimension
def __init__(self, restart=None, ignore_bad_restart_file=False,
label=os.curdir, atoms=None, **kwargs):
# set any additional keyword arguments
# for arg, val in self.parameters.iteritems():
for arg, val in kwargs.items():
if arg in self.valid_args:
# satisfy our static 8-char requirement in fortran
if (arg == ('sedc_scheme' or 'sedc_xc')):
setattr(self, arg, str(val).ljust(8))
elif (arg == 'logfile_name'):
setattr(self, arg, str(val).ljust(50))
else:
setattr(self, arg, val)
else:
raise RuntimeError('unknown keyword arg "%s" : not in %s'
% (arg, self.valid_args))
self.hirshvolrat_is_set = False
Calculator.__init__(self, restart, ignore_bad_restart_file,
label, atoms, **kwargs)
def calculate(self,
atoms=None,
properties=['energy', 'forces'],
system_changes=[
'positions', 'numbers', 'cell', 'pbc', 'charges',
'magmoms'
]):
Calculator.calculate(self, atoms)
calc_molcell = self.molcell.copy()
calc_molcell.atom = ase_atoms_to_pyscf(atoms)
# calc_molcell.a = atoms.cell
calc_molcell.build(None, None)
self.mf = self.mf_class(calc_molcell)
for key in self.mf_dict:
self.mf.__dict__[key] = self.mf_dict[key]
self.results['energy'] = self.mf.scf(verbose=0)
self.results['forces'] = -1 * grad.RHF(self.mf).kernel(
) # convert forces to gradient (*-1) !!!!! for the NEB run
self.results['mf'] = self.mf
def __setattr__(self, key, value):
"""Catch attribute sets to emulate legacy behavior.
Old LAMMPSRUN allows to just override the parameters
dictionary. "Modern" ase calculators can assume that default
parameters are always set, overrides of the
'parameters'-dictionary have to be caught and the default
parameters need to be added first. A check refuses to set
calculator attributes if they are unknown and set outside the
'__init__' functions.
"""
# !TODO: remove and break somebody's code (e.g. the test examples)
if (key == "parameters" and value is not None
and self.parameters is not None):
temp_dict = self.get_default_parameters()
if self.parameters:
for l_key in self.legacy_parameters:
try:
temp_dict[l_key] = self.parameters[l_key]
except KeyError:
pass
temp_dict.update(value)
value = temp_dict
if key in self.legacy_parameters and key != "parameters":
warnings.warn(self.legacy_warn_string.format(key))
self.set(**{key: value})
elif key in self.legacy_parameters_map:
warnings.warn(
self.legacy_warn_string.format("{} for {}".format(
self.legacy_parameters_map[key], key)))
self.set(**{self.legacy_parameters_map[key]: value})
# Catch setting none-default attributes
# one test was assigning an useless Attribute, but it still worked
# because the assigned object was before manipulation already handed
# over to the calculator (10/2018)
elif hasattr(self, key) or inspect.stack()[1][3] == "__init__":
Calculator.__setattr__(self, key, value)
else:
raise AttributeError("Setting unknown Attribute '{}'".format(key))
def calculate(self, atoms=None, properties=['energy'],
system_changes=['positions', 'numbers', 'cell',
'pbc', 'charges', 'magmoms']):
Calculator.calculate(self, atoms, properties, system_changes)
epsilon = self.parameters.epsilon
rho0 = self.parameters.rho0
r0 = self.parameters.r0
positions = self.atoms.get_positions()
energy = 0.0
forces = np.zeros((len(self.atoms), 3))
preF = 2 * epsilon * rho0 / r0
for i1, p1 in enumerate(positions):
for i2, p2 in enumerate(positions[:i1]):
diff = p2 - p1
r = sqrt(np.dot(diff, diff))
expf = exp(rho0 * (1.0 - r / r0))
energy += epsilon * expf * (expf - 2)
F = preF * expf * (expf - 1) * diff / r
forces[i1] -= F
forces[i2] += F
self.results['energy'] = energy
self.results['forces'] = forces
def calculate(self,
atoms=None,
properties=["energy"],
system_changes=all_changes):
r"""
This method will be called by ASE functions.
"""
if self.calculation_required(atoms, properties):
from mlcalcdriver.base.posinp import Posinp
Calculator.calculate(self, atoms)
posinp = Posinp.from_ase(atoms)
from mlcalcdriver.base.job import Job
job = Job(posinp=posinp, calculator=self.schnetpackcalculator)
for prop in properties:
job.run(prop)
results = {}
for prop, result in zip(job.results.keys(), job.results.values()):
results[prop] = np.squeeze(result)
self.results = results
def calculate(self, atoms, properties, system_changes):
Calculator.calculate(self, atoms, properties, system_changes)
if self.qmatoms is None:
self.initialize(atoms)
self.mmatoms.set_positions(atoms.positions[~self.mask])
self.qmatoms.set_positions(atoms.positions[self.mask])
if self.vacuum:
shift = self.center - self.qmatoms.positions.mean(axis=0)
self.qmatoms.positions += shift
else:
shift = (0, 0, 0)
self.embedding.update(shift)
ienergy, iqmforces, immforces = self.interaction.calculate(
self.qmatoms, self.mmatoms, shift)
qmenergy = self.qmatoms.get_potential_energy()
mmenergy = self.mmatoms.get_potential_energy()
energy = ienergy + qmenergy + mmenergy
print('Energies: {0:12.3f} {1:+12.3f} {2:+12.3f} = {3:12.3f}'.format(
ienergy, qmenergy, mmenergy, energy),
file=self.output)
qmforces = self.qmatoms.get_forces()
mmforces = self.mmatoms.get_forces()
mmforces += self.embedding.get_mm_forces()
forces = np.empty((len(atoms), 3))
forces[self.mask] = qmforces + iqmforces
forces[~self.mask] = mmforces + immforces
self.results['energy'] = energy
self.results['forces'] = forces
def calculate(self,
atoms=None,
properties=['energy'],
system_changes=changes):
Calculator.calculate(self, atoms, properties, system_changes)
self.write_input(self.atoms, properties, system_changes)
if self.command is None:
raise RuntimeError('Please set $%s environment variable ' %
('ASE_' + self.name.upper() + '_COMMAND') +
'or supply the command keyword')
olddir = os.getcwd()
try:
syscall = self.command + ' ' + \
self.parameters['INPUT_FILE'] + '> OUT '
errorcode = subprocess.call(syscall, shell=True)
finally:
os.chdir(olddir)
if errorcode:
raise RuntimeError('%s returned an error: %d' %
(self.name, errorcode))
self.read_results()
def calculate(self,
atoms=None,
properties=['energy'],
system_changes=[
'positions', 'numbers', 'cell', 'pbc', 'charges',
'magmoms'
]):
Calculator.calculate(self, atoms, properties, system_changes)
D = self.parameters.D
alpha = self.parameters.alpha
r0 = self.parameters.r0
# energy evaluation
dist = self.atoms.get_all_distances(mic=True).reshape(
-1
) # calculates all interatomic distances of the system using the minimum image convention
dist = dist[
dist !=
0] # excludes self-interaction (list of interatomic distances includes distance of atom to itself)
expf = np.exp(
alpha * r0 *
(1.0 - dist / r0)) # calculation of exponential factor of morse
energy = 0.5 * np.sum(
D * expf * (expf - 2)
) # evaluates Morse term for all distances and sums over the resulting energies, 0.5 is needed to account fo
# force evaluation
preF = 2 * D * alpha
dist_vec = self.atoms.get_all_distances(mic=True, vector=True)
dist = self.atoms.get_all_distances(mic=True)
dist[dist == 0] = 1e-9
expf = np.exp(alpha * r0 * (1.0 - dist / r0))
F2 = preF * expf * (expf - 1) / dist
F2 = -dist_vec * F2[:, :, np.newaxis]
forces = np.sum(F2, axis=1)
self.results['energy'] = energy
self.results['forces'] = forces
def calculate(self,
atoms=None,
properties=['energy'],
system_changes=['positions', 'numbers', 'cell']):
Calculator.calculate(self, atoms, properties, system_changes)
if not system_changes:
return
if 'numbers' in system_changes:
self.close()
self._run_vasp(atoms)
new = read(os.path.join(self.path, 'vasprun.xml'), index=-1)
self.results = {
'free_energy': new.get_potential_energy(force_consistent=True),
'energy': new.get_potential_energy(),
'forces': new.get_forces()[self.resort],
'stress': new.get_stress()
}
def calculate(self,
atoms=None,
properties=['energy'],
system_changes=all_changes):
Calculator.calculate(self, atoms, properties, system_changes)
if self.atoms.is_distributed:
raise NotImplementedError(
'variance is not implemented for distributed atoms')
self.atoms.update()
energy, energy_var = self.potential([self.atoms],
'energy',
variance=True)
forces, forces_var = self.potential([self.atoms],
'forces',
variance=True)
self.results['energy'] = energy.detach().numpy()[0]
self.results['forces'] = forces.detach().numpy()
# variances
self.results['energy_var'] = energy_var.detach().numpy()[0]
self.results['forces_var'] = forces_var.detach().numpy()
# NOTE: check if this is correct!
self.results['free_energy'] = self.results['energy']
def __init__(self, restart=None, ignore_bad_restart_file=False,
label='PySCF', atoms=None, scratch=None, **kwargs):
"""Construct PySCF-calculator object.
Parameters
==========
label: str
Prefix to use for filenames (label.in, label.txt, ...).
Default is 'PySCF'.
mfclass: PySCF mean-field class
molcell: PySCF :Mole: or :Cell:
"""
Calculator.__init__(self, restart=None, ignore_bad_restart_file=False,
label='PySCF', atoms=None, scratch=None, **kwargs)
# TODO
# This explicitly refers to "cell". How to refer
# to both cell and mol together?
self.mf=None
self.initialize(**kwargs)
