def png_atoms_labeled(smiles,
fname,
map_idx=True,
width=600,
height=400,
label_scale=2.0,
scale_bondwidth=True):
"""Write out png file of molecule with atoms labeled with their map index.
Parameters
----------
smiles: str
SMILES
fname: str
absolute path and filename for png
map_idx: bool
If True, lable atoms with map index instead of atom index. If set to True, input SMILES must have map indices.
"""
mol = oechem.OEGraphMol()
oechem.OESmilesToMol(mol, smiles)
oedepict.OEPrepareDepiction(mol)
opts = oedepict.OE2DMolDisplayOptions(width, height,
oedepict.OEScale_AutoScale)
if map_idx:
# check if molecule has map
if not cmiles.utils.has_atom_map(mol):
raise ValueError(
"Input SMILES must have atom maps to display map indices in image"
)
opts.SetAtomPropertyFunctor(oedepict.OEDisplayAtomMapIdx())
opts.SetAtomPropertyFunctor(oedepict.OEDisplayAtomMapIdx())
if not map_idx:
opts.SetAtomPropertyFunctor(oedepict.OEDisplayAtomIdx())
opts.SetAtomPropertyFunctor(oedepict.OEDisplayAtomMapIdx())
opts.SetAtomPropLabelFont(oedepict.OEFont(oechem.OEDarkGreen))
opts.SetAtomPropLabelFontScale(label_scale)
opts.SetBondWidthScaling(scale_bondwidth)
disp = oedepict.OE2DMolDisplay(mol, opts)
return oedepict.OERenderMolecule(fname, disp)
def render_atom_mapping(filename, molecule1, molecule2, new_to_old_atom_map, width=1200, height=600):
"""
Render the atom mapping to a PDF file.
Parameters
----------
filename : str
The PDF filename to write to.
molecule1 : openeye.oechem.OEMol
Initial molecule
molecule2 : openeye.oechem.OEMol
Final molecule
new_to_old_atom_map : dict of int
new_to_old_atom_map[molecule2_atom_index] is the corresponding molecule1 atom index
width : int, optional, default=1200
Width in pixels
height : int, optional, default=1200
Height in pixels
"""
from openeye import oechem, oedepict
# Make copies of the input molecules
molecule1, molecule2 = oechem.OEGraphMol(molecule1), oechem.OEGraphMol(molecule2)
oechem.OEGenerate2DCoordinates(molecule1)
oechem.OEGenerate2DCoordinates(molecule2)
# Add both to an OEGraphMol reaction
rmol = oechem.OEGraphMol()
rmol.SetRxn(True)
def add_molecule(mol):
# Add atoms
new_atoms = list()
old_to_new_atoms = dict()
for old_atom in mol.GetAtoms():
new_atom = rmol.NewAtom(old_atom.GetAtomicNum())
new_atoms.append(new_atom)
old_to_new_atoms[old_atom] = new_atom
# Add bonds
for old_bond in mol.GetBonds():
rmol.NewBond(old_to_new_atoms[old_bond.GetBgn()], old_to_new_atoms[old_bond.GetEnd()], old_bond.GetOrder())
return new_atoms, old_to_new_atoms
[new_atoms_1, old_to_new_atoms_1] = add_molecule(molecule1)
[new_atoms_2, old_to_new_atoms_2] = add_molecule(molecule2)
# Label reactant and product
for atom in new_atoms_1:
atom.SetRxnRole(oechem.OERxnRole_Reactant)
for atom in new_atoms_2:
atom.SetRxnRole(oechem.OERxnRole_Product)
core1 = oechem.OEAtomBondSet()
core2 = oechem.OEAtomBondSet()
# add all atoms to the set
core1.AddAtoms(new_atoms_1)
core2.AddAtoms(new_atoms_2)
# Label mapped atoms
core_change = oechem.OEAtomBondSet()
index =1
for (index2, index1) in new_to_old_atom_map.items():
new_atoms_1[index1].SetMapIdx(index)
new_atoms_2[index2].SetMapIdx(index)
# now remove the atoms that are core, so only uniques are highlighted
core1.RemoveAtom(new_atoms_1[index1])
core2.RemoveAtom(new_atoms_2[index2])
if new_atoms_1[index1].GetAtomicNum() != new_atoms_2[index2].GetAtomicNum():
# this means the element type is changing
core_change.AddAtom(new_atoms_1[index1])
core_change.AddAtom(new_atoms_2[index2])
index += 1
# Set up image options
itf = oechem.OEInterface()
oedepict.OEConfigureImageOptions(itf)
ext = oechem.OEGetFileExtension(filename)
if not oedepict.OEIsRegisteredImageFile(ext):
raise Exception('Unknown image type for filename %s' % filename)
ofs = oechem.oeofstream()
if not ofs.open(filename):
raise Exception('Cannot open output file %s' % filename)
# Setup depiction options
oedepict.OEConfigure2DMolDisplayOptions(itf, oedepict.OE2DMolDisplaySetup_AromaticStyle)
opts = oedepict.OE2DMolDisplayOptions(width, height, oedepict.OEScale_AutoScale)
oedepict.OESetup2DMolDisplayOptions(opts, itf)
opts.SetBondWidthScaling(True)
opts.SetAtomPropertyFunctor(oedepict.OEDisplayAtomMapIdx())
opts.SetAtomColorStyle(oedepict.OEAtomColorStyle_WhiteMonochrome)
# Depict reaction with component highlights
oechem.OEGenerate2DCoordinates(rmol)
rdisp = oedepict.OE2DMolDisplay(rmol, opts)
oedepict.OEAddHighlighting(rdisp, oechem.OEColor(oechem.OEPink),oedepict.OEHighlightStyle_Stick, core1)
oedepict.OEAddHighlighting(rdisp, oechem.OEColor(oechem.OEPurple),oedepict.OEHighlightStyle_Stick, core2)
oedepict.OEAddHighlighting(rdisp, oechem.OEColor(oechem.OEGreen),oedepict.OEHighlightStyle_Stick, core_change)
oedepict.OERenderMolecule(ofs, ext, rdisp)
ofs.close()
# current license or subscription to the applicable OpenEye offering.
# THE SAMPLE CODE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED. OPENEYE DISCLAIMS ALL WARRANTIES, INCLUDING, BUT
# NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
# PARTICULAR PURPOSE AND NONINFRINGEMENT. In no event shall OpenEye be
# liable for any damages or liability in connection with the Sample Code
# or its use.
from openeye import oechem
from openeye import oedepict
import sys
# @ <SNIPPET-DEPICTMDLREACTION-MAPIDX>
if len(sys.argv) != 3:
oechem.OEThrow.Usage("%s <mdlreaction> <imagefile>" % sys.argv[0])
ifile = sys.argv[1]
ofile = sys.argv[2]
ifs = oechem.oemolistream(ifile)
qmol = oechem.OEGraphMol()
oechem.OEReadMDLReactionQueryFile(ifs, qmol)
oedepict.OEPrepareDepiction(qmol)
opts = oedepict.OE2DMolDisplayOptions()
opts.SetAtomPropertyFunctor(oedepict.OEDisplayAtomMapIdx())
disp = oedepict.OE2DMolDisplay(qmol, opts)
oedepict.OERenderMolecule(ofile, disp)
# @ </SNIPPET-DEPICTMDLREACTION-MAPIDX>