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//
// Copyright (C) 2013 Greg Landrum
//
// @@ All Rights Reserved @@
// This file is part of the RDKit.
// The contents are covered by the terms of the BSD license
// which is included in the file license.txt, found at the root
// of the RDKit source tree.
//
#include <GraphMol/GraphMol.h>
#include <GraphMol/MolOps.h>
#include <RDGeneral/Exceptions.h>
#include <GraphMol/AtomIterators.h>
#include <GraphMol/BondIterators.h>
namespace RDKit {
namespace MolOps {
ROMol *renumberAtoms(const ROMol &mol,
const std::vector<unsigned int> &newOrder) {
unsigned int nAts = mol.getNumAtoms();
PRECONDITION(newOrder.size() == nAts, "bad newOrder size");
std::vector<unsigned int> revOrder(nAts);
for (unsigned int nIdx = 0; nIdx < nAts; ++nIdx) {
unsigned int oIdx = newOrder[nIdx];
if (oIdx > nAts) {
throw ValueErrorException("idx value exceeds numAtoms");
}
revOrder[oIdx] = nIdx;
}
// ------
// newOrder[i] : which atom should be in position i of the new mol
// revOrder[i] : where atom i of the original mol landed in the new mol
auto *res = new RWMol();
// copy over the atoms:
for (unsigned int nIdx = 0; nIdx < nAts; ++nIdx) {
unsigned int oIdx = newOrder[nIdx];
const Atom *oAtom = mol.getAtomWithIdx(oIdx);
Atom *nAtom = oAtom->copy();
res->addAtom(nAtom, false, true);
// take care of atom-numbering-dependent properties:
INT_VECT nAtoms;
if (nAtom->getPropIfPresent(common_properties::_ringStereoAtoms, nAtoms)) {
// FIX: ought to be able to avoid this copy.
for (auto &val : nAtoms) {
if (val < 0) {
val = -1 * (revOrder[(-val - 1)] + 1);
} else {
val = revOrder[val - 1] + 1;
}
}
nAtom->setProp(common_properties::_ringStereoAtoms, nAtoms, true);
}
}
// now the bonds:
for (ROMol::ConstBondIterator bi = mol.beginBonds(); bi != mol.endBonds();
++bi) {
const Bond *oBond = (*bi);
Bond *nBond = oBond->copy();
nBond->setBeginAtomIdx(revOrder[oBond->getBeginAtomIdx()]);
nBond->setEndAtomIdx(revOrder[oBond->getEndAtomIdx()]);
res->addBond(nBond, true);
// take care of atom-numbering-dependent properties:
for (auto &idx : nBond->getStereoAtoms()) {
idx = revOrder[idx];
}
}
// Conformers:
for (auto oConf = mol.beginConformers(); oConf != mol.endConformers();
++oConf) {
auto *nConf = new Conformer(nAts);
for (unsigned int i = 0; i < nAts; ++i) {
nConf->setAtomPos(i, (*oConf)->getAtomPos(newOrder[i]));
}
nConf->setId((*oConf)->getId());
nConf->set3D((*oConf)->is3D());
res->addConformer(nConf);
}
// update the ring info:
const RingInfo *oRings = mol.getRingInfo();
if (oRings && oRings->isInitialized()) {
RingInfo *nRings = res->getRingInfo();
nRings->reset();
nRings->initialize();
for (unsigned int i = 0; i < oRings->numRings(); ++i) {
const INT_VECT &oRing = oRings->atomRings()[i];
INT_VECT nRing(oRing.size());
for (unsigned int j = 0; j < oRing.size(); ++j) {
nRing[j] = revOrder[oRing[j]];
}
nRings->addRing(nRing, oRings->bondRings()[i]);
}
}
if (mol.getStereoGroups().size()) {
std::vector<StereoGroup> nsgs;
nsgs.reserve(mol.getStereoGroups().size());
for (const auto &osg : mol.getStereoGroups()) {
std::vector<Atom *> ats;
ats.reserve(osg.getAtoms().size());
for (const auto aptr : osg.getAtoms()) {
ats.push_back(res->getAtomWithIdx(revOrder[aptr->getIdx()]));
}
StereoGroup nsg(osg.getGroupType(), ats);
nsgs.push_back(nsg);
}
res->setStereoGroups(std::move(nsgs));
}
return dynamic_cast<ROMol *>(res);
}
}; // end of namespace MolOps
}; // end of namespace RDKit
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