def append_and_write_COMs(result_dict, structure, file, suffix='.cif'):
"""
Append all COMs in result dict to the ASE structure.
Window COMs: He
cage COM: Ne
optimized pore COM: Ar
"""
for molecule in result_dict:
# check if the molecule has any windows:
if result_dict[molecule][1]['diameters'] is None:
continue
# add cage COM
cage_com = ase.Atom(symbol='Ne', position=result_dict[molecule][0])
structure.append(cage_com)
# add window COMs:
for wCOM in result_dict[molecule][1]['centre_of_mass']:
window_com = ase.Atom(symbol='He', position=wCOM)
structure.append(window_com)
# add optimized cage pore COM
pore_com = ase.Atom(symbol='Ar', position=result_dict[molecule][2])
structure.append(pore_com)
# output to CIF
output = file.replace(suffix, '_appended.cif')
structure.write(output, format='cif')
output = file.replace(suffix, '_appended.pdb')
structure.write(output)
def randomCluster(n):
atoms = ase.Atoms()
atoms.append(ase.Atom('H', [0,0,0]))
for i in range(n-1):
farthest = 1e300
a = numpy.random.normal(0, 1, 3)
a = n * a/numpy.linalg.norm(a)
A = numpy.array([0,0,0]) - a
Au = A/numpy.linalg.norm(A)
A = 2*n*Au
for atom in atoms:
b = atom.position
B = b - a
C = Au * numpy.dot(B, Au)
D = b - (a + C)
Dm = numpy.linalg.norm(D)
Q = elements['H']['radius'] + elements[atom.symbol]['radius']
if Dm > Q:
continue
if Dm == 0:
V = Q
else:
V = math.sqrt((Q*Q) - (Dm*Dm))
farthest = min(numpy.linalg.norm(C)-V, farthest)
p = a + Au * farthest
atoms.append(ase.Atom('H', p))
return atoms
def broadened_linescan(self,
start,
end,
width,
threshold,
points=100,
nwidth=10,
bottom=0.0,
getlines=False):
""" Make data linescan between start and end points with effective 'width' for data scanner.
Not: only x- and y-coordinates of the start and end points matter.
Line scan between start and end, but with such a way that you perform
'nwidth' parallel line scans from width/2 distance from both sides of the original line.
The result with given distance from the start is the maximum over all parallel values.
Parameters:
-----------
start: position array
end: position array
width: width (in Angstrom) for data scanning
threshold: constant-data contour line threshold
nwidth: how many parallel line scans are performed
points: linear interpolation in output using this many points.
getlines: if True, return ase.Atoms object where atoms are 'X's with
starting and end-points of the line scans
Return: distance array and heights on that distance array
(if getlines, return also the ase.Atoms object)
"""
start, end = vec(start), vec(end)
n = np.cross(end - start, vec([0, 0, 1]))
n /= np.linalg.norm(n)
start0, end0 = start - (width / 2) * n, end - (width / 2) * n
atoms = ase.Atoms()
# perform nwidth parallel scans
hlist = []
for shift in np.linspace(0, width, nwidth):
l, h = self.linescan(start0 + shift * n,
end0 + shift * n,
threshold,
points=points,
bottom=bottom)
atoms.append(ase.Atom('X', start0 + shift * n))
atoms.append(ase.Atom('X', end0 + shift * n))
hlist.append(h)
hlist = np.array(hlist)
# take maxima from these scans
h = []
for i in range(len(l)):
h.append(max(hlist[:, i]))
if getlines:
return l, h, atoms
else:
return l, h
def get_graphene_structure(acc=1.42, distance=3.35):
""" Create ase.Atoms object for graphene
"""
cell = np.array([[acc * 0.5 * np.sqrt(3), -acc * 1.5, 0.0],
[acc * 0.5 * np.sqrt(3), acc * 1.5, 0.0],
[0.0, 0.0, distance]])
atoms = ase.Atoms(cell=cell, pbc=[True, True, True])
scaled_positions = np.array([[1. / 3., 2. / 3., 0.5],
[2. / 3., 1. / 3., 0.5]])
positions = np.dot(scaled_positions, cell)
atoms.append(ase.Atom(symbol="C", position=positions[0]))
atoms.append(ase.Atom(symbol="C", position=positions[1]))
atoms.wrap()
return atoms
def _superpose_next_intercalated_layer(block, natoms_layer=None):
"""
Parameters
-----------
block : ase.Atoms object
structure on which a molecule is put on graphite
natoms_layer : integer
number of C atoms in a layer
"""
## vector for the displacement of the next block
ibase = 0
center_hex = _get_center_of_a_hexagon(block[:natoms_layer], ibase=ibase)
disp = center_hex - block[0].position + block.cell[2, :]
## prepare the new cell
block2 = block.copy()
block2.cell[2, 2] *= 2
## displacement vector for the next block
disp = block[natoms_layer].position - block[0].position
disp[2] = block.cell[2, 2]
## superpose the next block
for ia in range(len(block)):
block2.append(
ase.Atom(symbol=block[ia].symbol,
position=block[ia].position + disp))
return block2
def soaper(structure, positions):
structure = structure.copy()
for i in range(len(positions)):
structure.append(
ase.Atom(position=tuple(positions[i]),
symbol=tracer_atomic_number))
return _soap(soap_cmd_line, structure, quip_path=quip_path)
def create_ase_ts_geometry(self):
mol_list = AllChem.MolToMolBlock(self.rdkit_ts).split('\n')
ase_atoms = []
for i, line in enumerate(mol_list):
if i > 3:
try:
atom0, atom1, bond, rest = line
atom0 = int(atom0)
atom0 = int(atom1)
bond = float(bond)
except ValueError:
try:
x, y, z, symbol = line.split()[0:4]
x = float(x)
y = float(y)
z = float(z)
ase_atoms.append(
ase.Atom(symbol=symbol, position=(x, y, z)))
except:
continue
self.ase_ts = ase.Atoms(ase_atoms)
def get_pubchem_structure(cid=24380):
"""
Parameter
-------------
cid : integer
PubChem ID
Return
----------
mol : Atoms object
"""
c = pcp.Compound.from_cid(cid)
mol = ase.Atoms()
natoms = len(c.elements)
mol.number_of_atoms = len(c.elements)
for ia in range(natoms):
el = c.elements[ia]
coord = np.zeros(3)
coord[0] = c.record['coords'][0]['conformers'][0]['x'][ia]
coord[1] = c.record['coords'][0]['conformers'][0]['y'][ia]
if c.coordinate_type.lower() == "2d":
coord[2] = 0.
else:
coord[2] = c.record['coords'][0]['conformers'][0]['z'][ia]
mol.append(ase.Atom(symbol=el, position=coord))
mol.wrap()
return mol
def _get_superposed_structure(gra,
mol,
distance=3.0,
tgra=3.35,
iax=2,
tol=1e-5):
for j in range(3):
if j == iax:
continue
if np.linalg.norm(gra.cell[j] - mol.cell[j]) > tol:
print("Error")
exit()
## get positions
zgra_max = np.max(gra.positions[:, iax])
zmol_min = np.min(mol.positions[:, iax])
zmol_max = np.max(mol.positions[:, iax])
tmol = zmol_max - zmol_min
## translate vector for the molecule
disp_mol = np.array([0., 0., zgra_max - zmol_min + distance])
## adjust cell size
zheight = gra.cell[iax, iax] - tgra + 2. * distance + tmol
gra.cell[iax, iax] = zheight
## superpose
gic = ase.Atoms(cell=gra.cell, pbc=[True, True, True])
for atom in gra:
gic.append(atom)
for atom in mol:
gic.append(
ase.Atom(symbol=atom.symbol, position=atom.position + disp_mol))
return gic
def surrogate_features(self, observations: List[ObservationType],
focus: torch.Tensor, element: torch.Tensor,
distance: torch.Tensor, angle: torch.Tensor,
dihedral: torch.Tensor) -> torch.Tensor:
features = torch.zeros(size=(len(observations), self.num_afeats),
dtype=torch.float32,
device=self.device)
focus = to_numpy(focus)
element = to_numpy(element)
distance = to_numpy(distance)
angle = to_numpy(angle)
dihedral = to_numpy(dihedral)
for i, observation in enumerate(observations):
atoms, _ = self.observation_space.parse(observation)
positions = [atom.position for atom in atoms]
new_position = zmat.position_atom_helper(
positions=positions,
focus=int(round(focus[i, 0])),
distance=distance[i, 0],
angle=angle[i, 0],
dihedral=dihedral[i, 0],
)
new_element = int(round(element[i, 0]))
new_atom = ase.Atom(
symbol=self.observation_space.bag_space.get_symbol(
new_element),
position=new_position)
atoms.append(new_atom)
features[i] = self.embedding_fn(self.converter(atoms))[:, -1, :]
return features
def remove_solvent(pw_struct, ASE_struct, mol_list):
"""
Remove solvents and write desolvated structure to ASE_struct.
Keyword Arguments:
pw_struct (pyWindow Rebuilt Molecule) -
structure to analyze molecules of
ASE_struct (ASE.Atoms()) -
structure to append non-solvent atoms to
mol_list (list) -
list of distinct molecules from pyWindow modularize
Returns:
ASE_struct_out (ASE.Atoms()) - structure with non-solvent atoms
"""
# make deep copy of ASE_struct
ASE_struct_out = copy.deepcopy(ASE_struct)
for molecule in pw_struct.molecules:
logging.info(f'Analysing molecule {molecule + 1} out of '
f'{len(pw_struct.molecules)}')
mol = pw_struct.molecules[molecule]
if is_solvent(molecule=mol) is False:
logging.info(f'is NOT solvent with {mol.no_of_atoms} atoms')
# append atoms to ASE_struct_out
atom_ids = np.arange(1, mol.no_of_atoms + 1)
coords = mol.coordinates
atom_symbs = mol.atom_ids
for i, j, k in zip(atom_ids, atom_symbs, coords):
curr_atm = ase.Atom(symbol=j, position=k, index=i)
ASE_struct_out.append(curr_atm)
return ASE_struct_out
def ase_atoms_from_pw_out(pw_out_file):
with open(pw_out_file, 'r') as f:
contents = f.read()
final_coords_str = re.search(
"Begin final coordinates\n([\s\S]*)End final coordinates",
contents).group(1)
atoms = ase.Atoms()
for line in final_coords_str.split("\n"):
sp = line.split()
if len(sp) == 4:
atoms.append(ase.Atom(sp[0], np.array(sp[1:], dtype=float)))
celldm1 = float(
re.search("celldm\(1\)=(.*)celldm\(2\)=", contents).group(1))
cell_str = re.search("crystal axes:.*\n([\s\S]*)reciprocal axes",
contents).group(1)
cell = []
for line in cell_str.split("\n"):
sp = line.split()
if len(sp) == 7:
cell += sp[3:6]
cell = np.array(cell, dtype=float).reshape((3, 3)) * celldm1 / ang_2_bohr
atoms.cell = cell
atoms.pbc = True
return atoms
def ase_atoms(crystal, **kwargs):
"""
Convert a :class:`crystals.Crystal` object into an :class:`ase.Atoms` object.
Keyword arguments are passed to :class:`ase.Atoms` constructor.
Parameters
----------
crystal : :class:`Crystal`
Crystal to be converted.
Returns
-------
atoms : ase.Atoms
Group of atoms ready for ASE's routines.
Raises
------
ImportError : If ASE is not installed
"""
if not WITH_ASE:
raise ImportError("ASE is not installed/importable.")
return ase.Atoms(
symbols=[
ase.Atom(
symbol=atom.element,
position=atom.coords_cartesian,
magmom=atom.magmom,
mass=atom.mass,
) for atom in crystal
],
cell=np.array(crystal.lattice_vectors),
**kwargs,
)
def get_ase_mol(self):
"""
A method for creating an ase atoms object from an rdkit mol
"""
if not self.rdkit_molecule:
self.get_rdkit_mol()
mol_list = rdkit.Chem.AllChem.MolToMolBlock(
self.rdkit_molecule).split('\n')
ase_atoms = []
for i, line in enumerate(mol_list):
if i > 3:
try:
atom0, atom1, bond, rest = line
atom0 = int(atom0)
atom0 = int(atom1)
bond = float(bond)
except ValueError:
try:
x, y, z, symbol = line.split()[0:4]
x = float(x)
y = float(y)
z = float(z)
ase_atoms.append(
ase.Atom(symbol=symbol, position=(x, y, z)))
except BaseException:
continue
self._ase_molecule = ase.Atoms(ase_atoms)
return self.ase_molecule
def get_stacking_graphene(na=1, nb=1, nc=1, distance=3.35):
""" Get ase.Atoms object for an AB stacking graphite
"""
graphene = get_graphene_structure(distance=distance)
## make a supercell along x and y directions
sc = make_supercell(graphene, [[na, 0, 0], [0, nb, 0], [0, 0, 1]])
natoms_layer = len(sc)
## make a supercell along z direction
graphite = ase.Atoms(cell=[sc.cell[0], sc.cell[1], sc.cell[2] * nc],
pbc=[True, True, True])
elements = ['C', 'C']
for iz in range(nc):
## displacment to form AB stacking
disp = np.zeros(3)
if iz % 2 == 1:
disp += (graphene.cell[0, :] + graphene.cell[1, :] * 2.) * 2. / 3.
disp += sc.cell[2, :] * iz
## add atoms at the layer
for ia in range(len(sc)):
graphite.append(
ase.Atom(symbol=elements[iz % 2],
position=sc.positions[ia, :] + disp,
tag=iz % 2 + 1))
##
graphite.wrap()
return graphite
def plot_centres_xsf(structure,w90_calc):
a = structure.get_ase()
new_a = a.copy()
out = w90_calc.out.output_parameters.get_dict()['wannier_functions_output']
coords = [i['coordinates'] for i in out]
for c in coords:
new_a.append(ase.Atom('X',c))
new_a.write('./wannier.xsf')
def migration_prep(self):
sz = 16
perf_atoms = self.set_bcc_convention(size=[sz, sz, sz])
vect = np.array([1, 1, 1]) * self.pot['lattice']
pos1 = vect * sz * 0.5
pos2 = vect * sz * 0.5 + 0.5 * vect
pos3 = vect * 0.0
dellist = []
atoms = perf_atoms.copy()
for atom in atoms:
if np.isclose(pos1 - atom.position, np.array([0, 0, 0])).all() or \
np.isclose(pos2 - atom.position,
np.array([0, 0, 0])).all() or \
np.isclose(pos3 - atom.position,
np.array([0, 0, 0])).all():
dellist.append(atom.index)
print(dellist)
del atoms[dellist]
atoms1 = atoms.copy()
atoms2 = atoms.copy()
atoms1.append(ase.Atom('Nb', pos1))
# atoms1.append(ase.Atom('Nb', pos3))
# set this atom to be other type so we can fix it in lammps
atoms1.append(ase.Atom('W', pos3))
atoms2.append(ase.Atom('Nb', pos2))
# atoms2.append(ase.Atom('Nb', pos3))
atoms2.append(ase.Atom('W', pos3))
# for vasp
self.write_poscar_fix(atoms1, "posi") # change it manually then
self.write_poscar_fix(atoms2, "posf")
# for md
system, elements = am.convert.ase_Atoms.load(atoms1)
lmp.atom_data.dump(system, "init.txt")
shutil.copy("init.txt", "init0.txt")
system, elements = am.convert.ase_Atoms.load(atoms2)
lmp.atom_data.dump(system, "final.txt")
shutil.copy("final.txt", "init1.txt")
def get_atoms_obj(self):
"""
Builds NP in the form of a Cu NP ase.Atoms object
- stores under self.atoms_obj property
- returns atoms_obj
"""
if self._atoms_obj is None:
self._atoms_obj = ase.Atoms(
[ase.Atom('Cu', (i.x, i.y, i.z)) for i in self.atoms])
return self._atoms_obj
def Atoms(self):
"""
convert to ase object
"""
import ase
mu = pb.Molecule(self.m)
m2 = ase.Atoms([])
for ai in mu.atoms:
m2.append(ase.Atom(ai.atomicnum, ai.coords))
return m2
def to_ase(self):
cell = self.content['cell']
atoms = [
ase.Atom(site[0], tuple(site[1]))
for site in self.content['positions']
]
aseobj = ase.Atoms(atoms)
aseobj.set_cell(cell)
aseobj.set_pbc(self.content['periodicity'])
return aseobj
def plot_centres_xsf(structure, w90_calc, filename='./wannier.xsf'):
"""
Plots Wannier function centres in .xsf format
"""
a = structure.get_ase()
new_a = a.copy()
out = w90_calc.out.output_parameters.get_dict()['wannier_functions_output']
coords = [i['wf_centres'] for i in out]
for c in coords:
new_a.append(ase.Atom('X', c))
new_a.write(filename)
def read_bopfox(filename):
f = open(filename,'r')
lines = f.readlines()
f.close()
line_index = 0
newlines = []
# strip out comment lines
for line in lines:
l = line.strip()
if len(l) < 1:
continue
if l.startswith("/"):
continue
if l.startswith("#"):
continue
newlines.append(l)
lines = newlines
a = ase.Atoms()
box = numpy.zeros((3,3))
coord = "cartesian"
scale = 1.0
while line_index < len(lines):
l = lines[line_index]
if "magnetisation" in l:
break
if "=" in l:
key = l.split("=")[0].strip()
if key == "StrucName":
pass
elif key == "aLat":
scale = float(l.split("=")[1].strip())
elif key == "a1":
box[0] = [float(i) for i in l.split("=")[1].strip().split()]
elif key == "a2":
box[1] = [float(i) for i in l.split("=")[1].strip().split()]
elif key == "a3":
box[2] = [float(i) for i in l.split("=")[1].strip().split()]
elif key == "coord":
coord = l.split("=")[1].strip()
else:
atomdata = l.strip().split()
symbol = atomdata[0]
x, y, z = float(atomdata[1]), float(atomdata[2]), float(atomdata[3])
a.append(ase.Atom(symbol, (x, y, z)))
line_index += 1
a.cell = box * scale
if coord == "direct":
for i in range(len(a)):
a.positions[i] = numpy.dot(a.positions[i], a.cell)
else:
for i in range(len(a)):
a.positions[i] *= scale
return a
def setElsProps(self):
for e in self.setting['elements']:
a = ase.Atom(e)
mass = a.mass / _Nav
number = a.number
form = pt.formula(a.symbol)
e_ = form.structure[0][1]
crys = e_.crystal_structure['symmetry']
a_ = e_.crystal_structure['a']
self.elsProps.append({'ase':a, 'mass': mass, 'structure': crys,
'a':a_ , 'number':number})
def check_dissociated(self, cutoff=1.2):
"""Check if adsorbate dissociates"""
dissociated = False
if not len(self.B) > self.nslab + 1: # only one adsorbate
return dissociated
adsatoms = [atom for atom in self.B[self.nslab:]]
ads0, ads1 = set(atom.symbol for atom in adsatoms)
bond_dist = get_ads_dist(self.B, ads0, ads1)
Cradii = [
cradii[atom.number]
for atom in [ase.Atom(ads0), ase.Atom(ads1)]
]
bond_dist0 = sum(Cradii)
if bond_dist > cutoff * bond_dist0:
print('DISSOCIATED: {} Ang > 1.2 * {} Ang'.format(
bond_dist, bond_dist0))
dissociated = True
return dissociated
def plot_centres_xsf(structure, w90_calc, filename='./wannier.xsf'):
"""
Plots Wannier function centres in .xsf format
"""
# Disabling the import-error since this is an optional requirement
import ase # pylint: disable=import-error
a = structure.get_ase()
new_a = a.copy()
out = w90_calc.out.output_parameters.get_dict()['wannier_functions_output']
coords = [i['wf_centres'] for i in out]
for c in coords:
new_a.append(ase.Atom('X', c))
new_a.write(filename)
def _structure_to_atoms(self) -> Atoms:
"""
Returns the structure as an ASE Atoms object.
Returns
-------
atomic configuration
"""
import ase
conf = ase.Atoms(pbc=self.pbc)
conf.set_cell(self.cell)
for symbol, position in zip(self.chemical_symbols, self.positions):
conf.append(ase.Atom(symbol, position))
return conf
def launch(box_size, dimer_separation, firstdimer_elements,
seconddimer_elements, structure_group_label,
structure_group_description, dryrun):
"""
Script for creating surface structures for a given size and matrix element. Generates
a set of structures with varying vacuum thickness
"""
if not dryrun:
structure_group = Group.objects.get_or_create(
label=structure_group_label,
description=structure_group_description)[0]
else:
structure_group = None
box_size = float(box_size)
extras = {'box_size': box_size}
base_structure = ase.Atoms(cell=([box_size, box_size, box_size]), pbc=True)
seperation_distances = get_displacements_array(dimer_separation)
firstdimer_elements = prep_elementlist(firstdimer_elements)
seconddimer_elements = prep_elementlist(seconddimer_elements)
previous_firstdimer_elements = [
] # to avoid duplication in generated structures
for firstdimer_element in firstdimer_elements:
dimer_structure = base_structure.copy()
# create and store single atom version
first_atom = ase.Atom(firstdimer_element)
dimer_structure.append(first_atom)
extras['firstdimer_element'] = firstdimer_element
extras['second_element'] = ""
extras['atomatom_distance'] = ""
store_asestructure(dimer_structure, extras, structure_group, dryrun)
dimer_structure.append(first_atom) #This will be changed later
for seconddimer_element in seconddimer_elements:
dimer_structure[1].symbol = seconddimer_element
if seconddimer_element in previous_firstdimer_elements:
continue
extras['second_element'] = seconddimer_element
for distance in seperation_distances:
dimer_structure[1].position[0] = distance
extras['atomatom_distance'] = distance
store_asestructure(dimer_structure, extras, structure_group,
dryrun)
previous_firstdimer_elements += [firstdimer_element]
def read_aims(filename):
f = open(filename)
atoms = ase.Atoms()
l = 0
cell = numpy.zeros((3, 3))
for line in f:
line = line[:line.find('#')]
line = line.strip()
if len(line) == 0: continue
fields = line.split()
if fields[0] == 'lattice_vector':
cell[l, 0] = float(fields[1])
cell[l, 1] = float(fields[2])
cell[l, 2] = float(fields[3])
l += 1
if l == 3:
atoms.set_cell(cell)
print cell
if fields[0] == 'atom':
pos = numpy.array(
(float(fields[1]), float(fields[2]), float(fields[3])))
element = fields[4]
atoms.append(ase.Atom(element, position=pos))
if fields[0] == 'atom_frac':
scaled_pos = numpy.array(
(float(fields[1]), float(fields[2]), float(fields[3])))
pos = numpy.dot(cell, scaled_pos)
element = fields[4]
atoms.append(ase.Atom(element, position=pos))
f.close()
return atoms
def get_gic_structure(nprim=[2, 2, 1],
molecule=None,
distance=3.0,
layer_distance=3.35,
set_nemdtag=True):
""" Create a graphene intercalation compund
Parameters
-------------
distance : float, unit=[A]
distance between the molecule and graphite layer
"""
## make a graphtie structure
graphite = get_stacking_graphene(na=nprim[0],
nb=nprim[1],
nc=nprim[2],
distance=layer_distance)
## center of a hexagonal lattice in the top layer
natoms_layer = int(len(graphite) / nprim[2])
center_hex = _get_center_of_a_hexagon(graphite[-natoms_layer:])
## get the center of the molecule
center_mol = np.zeros(3)
for j in range(3):
center_mol[j] += np.average(molecule.get_positions()[:, j])
## put a molecule on the center of the hexagonal lattice
## Be careful for the z-position
disp = center_hex + np.array([0, 0, distance]) - center_mol
intercalate = graphite.copy()
intercalate.cell[2, 2] += distance * 2.0 - layer_distance
for ia in range(len(molecule)):
intercalate.append(
ase.Atom(symbol=molecule[ia].symbol,
position=molecule[ia].position + disp))
## If the number of graphene layers is even, the position of the next layers
## should be adjusted.
if nprim[2] % 2 == 0:
intercalate = _superpose_next_intercalated_layer(
intercalate, natoms_layer=natoms_layer)
##
_set_element_center(intercalate, element="Fe")
## set tag for NEMD simulation
if set_nemdtag:
set_tags4md_structure(intercalate)
return intercalate
def _get_ase_atoms(cjson_atoms):
elements = cjson_atoms.get('elements', {})
number = elements.get('number')
if number is None:
symbol = elements.get('symbol')
if symbol is None:
raise Exception('Atomic numbers are missing.')
number = list(map(lambda sym: ase.data.atomic_numbers[sym], symbol))
n_atoms = len(number)
positions = cjson_atoms.get('coords', {}).get('3d', [])
if len(positions) != 3 * n_atoms:
raise Exception('Atomic positions are missing.')
atoms = []
for i in range(n_atoms):
atoms.append(ase.Atom(number[i], positions[i * 3:i * 3 + 3]))
return atoms