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root/OpenMD/trunk/src/parallel/ForceMatrixDecomposition.cpp
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Comparing trunk/src/parallel/ForceMatrixDecomposition.cpp (file contents):
Revision 1796 by gezelter, Mon Sep 10 18:38:44 2012 UTC vs.
Revision 1896 by gezelter, Tue Jul 2 20:02:31 2013 UTC

# Line 35 | Line 35
35   *                                                                      
36   * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).            
37   * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
38 < * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
38 > * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008).          
39   * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
40   * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
41   */
# Line 308 | Line 308 | namespace OpenMD {
308    
309    void ForceMatrixDecomposition::createGtypeCutoffMap() {
310      
311 +    GrCut.clear();
312 +    GrCutSq.clear();
313 +    GrlistSq.clear();
314 +
315      RealType tol = 1e-6;
316      largestRcut_ = 0.0;
317      int atid;
# Line 418 | Line 422 | namespace OpenMD {
422   #endif
423      
424      RealType tradRcut = groupMax;
425 +
426 +    GrCut.resize( gTypeCutoffs.size() );
427 +    GrCutSq.resize( gTypeCutoffs.size() );
428 +    GrlistSq.resize( gTypeCutoffs.size() );
429  
430 +
431      for (unsigned int i = 0; i < gTypeCutoffs.size();  i++) {
432 +      GrCut[i].resize( gTypeCutoffs.size() , 0.0);
433 +      GrCutSq[i].resize( gTypeCutoffs.size(), 0.0 );
434 +      GrlistSq[i].resize( gTypeCutoffs.size(), 0.0 );
435 +
436        for (unsigned int j = 0; j < gTypeCutoffs.size();  j++) {      
437          RealType thisRcut;
438          switch(cutoffPolicy_) {
# Line 442 | Line 455 | namespace OpenMD {
455            break;
456          }
457  
458 <        pair<int,int> key = make_pair(i,j);
446 <        gTypeCutoffMap[key].first = thisRcut;
458 >        GrCut[i][j] = thisRcut;
459          if (thisRcut > largestRcut_) largestRcut_ = thisRcut;
460 <        gTypeCutoffMap[key].second = thisRcut*thisRcut;
461 <        gTypeCutoffMap[key].third = pow(thisRcut + skinThickness_, 2);
460 >        GrCutSq[i][j] = thisRcut * thisRcut;
461 >        GrlistSq[i][j] = pow(thisRcut + skinThickness_, 2);
462 >
463 >        // pair<int,int> key = make_pair(i,j);
464 >        // gTypeCutoffMap[key].first = thisRcut;
465 >        // gTypeCutoffMap[key].third = pow(thisRcut + skinThickness_, 2);
466          // sanity check
467          
468          if (userChoseCutoff_) {
469 <          if (abs(gTypeCutoffMap[key].first - userCutoff_) > 0.0001) {
469 >          if (abs(GrCut[i][j] - userCutoff_) > 0.0001) {
470              sprintf(painCave.errMsg,
471                      "ForceMatrixDecomposition::createGtypeCutoffMap "
472                      "user-specified rCut (%lf) does not match computed group Cutoff\n", userCutoff_);
# Line 463 | Line 479 | namespace OpenMD {
479      }
480    }
481  
482 <  groupCutoffs ForceMatrixDecomposition::getGroupCutoffs(int cg1, int cg2) {
482 >  void ForceMatrixDecomposition::getGroupCutoffs(int &cg1, int &cg2, RealType &rcut, RealType &rcutsq, RealType &rlistsq) {
483      int i, j;  
484   #ifdef IS_MPI
485      i = groupRowToGtype[cg1];
# Line 472 | Line 488 | namespace OpenMD {
488      i = groupToGtype[cg1];
489      j = groupToGtype[cg2];
490   #endif    
491 <    return gTypeCutoffMap[make_pair(i,j)];
491 >    rcut = GrCut[i][j];
492 >    rcutsq = GrCutSq[i][j];
493 >    rlistsq = GrlistSq[i][j];
494 >    return;
495 >    //return gTypeCutoffMap[make_pair(i,j)];
496    }
497  
498    int ForceMatrixDecomposition::getTopologicalDistance(int atom1, int atom2) {
499      for (unsigned int j = 0; j < toposForAtom[atom1].size(); j++) {
500        if (toposForAtom[atom1][j] == atom2)
501          return topoDist[atom1][j];
502 <    }
502 >    }                                          
503      return 0;
504    }
505  
# Line 559 | Line 579 | namespace OpenMD {
579             atomColData.electricField.end(), V3Zero);
580      }
581  
562 –    if (storageLayout_ & DataStorage::dslFlucQForce) {    
563 –      fill(atomRowData.flucQFrc.begin(), atomRowData.flucQFrc.end(),
564 –           0.0);
565 –      fill(atomColData.flucQFrc.begin(), atomColData.flucQFrc.end(),
566 –           0.0);
567 –    }
568 –
582   #endif
583      // even in parallel, we need to zero out the local arrays:
584  
# Line 639 | Line 652 | namespace OpenMD {
652        AtomPlanMatrixColumn->gather(snap_->atomData.aMat,
653                                     atomColData.aMat);
654      }
655 <    
656 <    // if needed, gather the atomic eletrostatic frames
657 <    if (storageLayout_ & DataStorage::dslElectroFrame) {
658 <      AtomPlanMatrixRow->gather(snap_->atomData.electroFrame,
659 <                                atomRowData.electroFrame);
660 <      AtomPlanMatrixColumn->gather(snap_->atomData.electroFrame,
661 <                                   atomColData.electroFrame);
655 >
656 >    // if needed, gather the atomic eletrostatic information
657 >    if (storageLayout_ & DataStorage::dslDipole) {
658 >      AtomPlanVectorRow->gather(snap_->atomData.dipole,
659 >                                atomRowData.dipole);
660 >      AtomPlanVectorColumn->gather(snap_->atomData.dipole,
661 >                                   atomColData.dipole);
662      }
663  
664 +    if (storageLayout_ & DataStorage::dslQuadrupole) {
665 +      AtomPlanMatrixRow->gather(snap_->atomData.quadrupole,
666 +                                atomRowData.quadrupole);
667 +      AtomPlanMatrixColumn->gather(snap_->atomData.quadrupole,
668 +                                   atomColData.quadrupole);
669 +    }
670 +        
671      // if needed, gather the atomic fluctuating charge values
672      if (storageLayout_ & DataStorage::dslFlucQPosition) {
673        AtomPlanRealRow->gather(snap_->atomData.flucQPos,
# Line 679 | Line 699 | namespace OpenMD {
699          snap_->atomData.density[i] += rho_tmp[i];
700      }
701  
702 +    // this isn't necessary if we don't have polarizable atoms, but
703 +    // we'll leave it here for now.
704      if (storageLayout_ & DataStorage::dslElectricField) {
705        
706        AtomPlanVectorRow->scatter(atomRowData.electricField,
# Line 686 | Line 708 | namespace OpenMD {
708        
709        int n = snap_->atomData.electricField.size();
710        vector<Vector3d> field_tmp(n, V3Zero);
711 <      AtomPlanVectorColumn->scatter(atomColData.electricField, field_tmp);
711 >      AtomPlanVectorColumn->scatter(atomColData.electricField,
712 >                                    field_tmp);
713        for (int i = 0; i < n; i++)
714          snap_->atomData.electricField[i] += field_tmp[i];
715      }
# Line 784 | Line 807 | namespace OpenMD {
807        for (int i = 0; i < nq; i++)
808          snap_->atomData.flucQFrc[i] += fqfrc_tmp[i];
809              
810 +    }
811 +
812 +    if (storageLayout_ & DataStorage::dslElectricField) {
813 +
814 +      int nef = snap_->atomData.electricField.size();
815 +      vector<Vector3d> efield_tmp(nef, V3Zero);
816 +
817 +      AtomPlanVectorRow->scatter(atomRowData.electricField, efield_tmp);
818 +      for (int i = 0; i < nef; i++) {
819 +        snap_->atomData.electricField[i] += efield_tmp[i];
820 +        efield_tmp[i] = 0.0;
821 +      }
822 +      
823 +      AtomPlanVectorColumn->scatter(atomColData.electricField, efield_tmp);
824 +      for (int i = 0; i < nef; i++)
825 +        snap_->atomData.electricField[i] += efield_tmp[i];
826      }
827  
828 +
829      nLocal_ = snap_->getNumberOfAtoms();
830  
831      vector<potVec> pot_temp(nLocal_,
# Line 919 | Line 959 | namespace OpenMD {
959  
960  
961  
962 <  int ForceMatrixDecomposition::getNAtomsInRow() {  
962 >  int& ForceMatrixDecomposition::getNAtomsInRow() {  
963   #ifdef IS_MPI
964      return nAtomsInRow_;
965   #else
# Line 930 | Line 970 | namespace OpenMD {
970    /**
971     * returns the list of atoms belonging to this group.  
972     */
973 <  vector<int> ForceMatrixDecomposition::getAtomsInGroupRow(int cg1){
973 >  vector<int>& ForceMatrixDecomposition::getAtomsInGroupRow(int cg1){
974   #ifdef IS_MPI
975      return groupListRow_[cg1];
976   #else
# Line 938 | Line 978 | namespace OpenMD {
978   #endif
979    }
980  
981 <  vector<int> ForceMatrixDecomposition::getAtomsInGroupColumn(int cg2){
981 >  vector<int>& ForceMatrixDecomposition::getAtomsInGroupColumn(int cg2){
982   #ifdef IS_MPI
983      return groupListCol_[cg2];
984   #else
# Line 955 | Line 995 | namespace OpenMD {
995      d = snap_->cgData.position[cg2] - snap_->cgData.position[cg1];
996   #endif
997      
998 <    snap_->wrapVector(d);
998 >    if (usePeriodicBoundaryConditions_) {
999 >      snap_->wrapVector(d);
1000 >    }
1001      return d;    
1002    }
1003  
1004 <  Vector3d ForceMatrixDecomposition::getGroupVelocityColumn(int cg2){
1004 >  Vector3d& ForceMatrixDecomposition::getGroupVelocityColumn(int cg2){
1005   #ifdef IS_MPI
1006      return cgColData.velocity[cg2];
1007   #else
# Line 967 | Line 1009 | namespace OpenMD {
1009   #endif
1010    }
1011  
1012 <  Vector3d ForceMatrixDecomposition::getAtomVelocityColumn(int atom2){
1012 >  Vector3d& ForceMatrixDecomposition::getAtomVelocityColumn(int atom2){
1013   #ifdef IS_MPI
1014      return atomColData.velocity[atom2];
1015   #else
# Line 985 | Line 1027 | namespace OpenMD {
1027   #else
1028      d = snap_->cgData.position[cg1] - snap_->atomData.position[atom1];
1029   #endif
1030 <
1031 <    snap_->wrapVector(d);
1030 >    if (usePeriodicBoundaryConditions_) {
1031 >      snap_->wrapVector(d);
1032 >    }
1033      return d;    
1034    }
1035    
# Line 998 | Line 1041 | namespace OpenMD {
1041   #else
1042      d = snap_->cgData.position[cg2] - snap_->atomData.position[atom2];
1043   #endif
1044 <    
1045 <    snap_->wrapVector(d);
1044 >    if (usePeriodicBoundaryConditions_) {
1045 >      snap_->wrapVector(d);
1046 >    }
1047      return d;    
1048    }
1049  
1050 <  RealType ForceMatrixDecomposition::getMassFactorRow(int atom1) {
1050 >  RealType& ForceMatrixDecomposition::getMassFactorRow(int atom1) {
1051   #ifdef IS_MPI
1052      return massFactorsRow[atom1];
1053   #else
# Line 1011 | Line 1055 | namespace OpenMD {
1055   #endif
1056    }
1057  
1058 <  RealType ForceMatrixDecomposition::getMassFactorColumn(int atom2) {
1058 >  RealType& ForceMatrixDecomposition::getMassFactorColumn(int atom2) {
1059   #ifdef IS_MPI
1060      return massFactorsCol[atom2];
1061   #else
# Line 1028 | Line 1072 | namespace OpenMD {
1072   #else
1073      d = snap_->atomData.position[atom2] - snap_->atomData.position[atom1];
1074   #endif
1075 <
1076 <    snap_->wrapVector(d);
1075 >    if (usePeriodicBoundaryConditions_) {
1076 >      snap_->wrapVector(d);
1077 >    }
1078      return d;    
1079    }
1080  
1081 <  vector<int> ForceMatrixDecomposition::getExcludesForAtom(int atom1) {
1081 >  vector<int>& ForceMatrixDecomposition::getExcludesForAtom(int atom1) {
1082      return excludesForAtom[atom1];
1083    }
1084  
# Line 1124 | Line 1169 | namespace OpenMD {
1169    
1170   #ifdef IS_MPI
1171      idat.atypes = make_pair( atypesRow[atom1], atypesCol[atom2]);
1172 +    idat.atid1 = identsRow[atom1];
1173 +    idat.atid2 = identsCol[atom2];
1174      //idat.atypes = make_pair( ff_->getAtomType(identsRow[atom1]),
1175      //                         ff_->getAtomType(identsCol[atom2]) );
1176      
# Line 1132 | Line 1179 | namespace OpenMD {
1179        idat.A2 = &(atomColData.aMat[atom2]);
1180      }
1181      
1135 –    if (storageLayout_ & DataStorage::dslElectroFrame) {
1136 –      idat.eFrame1 = &(atomRowData.electroFrame[atom1]);
1137 –      idat.eFrame2 = &(atomColData.electroFrame[atom2]);
1138 –    }
1139 –
1182      if (storageLayout_ & DataStorage::dslTorque) {
1183        idat.t1 = &(atomRowData.torque[atom1]);
1184        idat.t2 = &(atomColData.torque[atom2]);
1185      }
1186  
1187 +    if (storageLayout_ & DataStorage::dslDipole) {
1188 +      idat.dipole1 = &(atomRowData.dipole[atom1]);
1189 +      idat.dipole2 = &(atomColData.dipole[atom2]);
1190 +    }
1191 +
1192 +    if (storageLayout_ & DataStorage::dslQuadrupole) {
1193 +      idat.quadrupole1 = &(atomRowData.quadrupole[atom1]);
1194 +      idat.quadrupole2 = &(atomColData.quadrupole[atom2]);
1195 +    }
1196 +
1197      if (storageLayout_ & DataStorage::dslDensity) {
1198        idat.rho1 = &(atomRowData.density[atom1]);
1199        idat.rho2 = &(atomColData.density[atom2]);
# Line 1175 | Line 1227 | namespace OpenMD {
1227   #else
1228      
1229      idat.atypes = make_pair( atypesLocal[atom1], atypesLocal[atom2]);
1230 +    idat.atid1 = idents[atom1];
1231 +    idat.atid2 = idents[atom2];
1232  
1233      if (storageLayout_ & DataStorage::dslAmat) {
1234        idat.A1 = &(snap_->atomData.aMat[atom1]);
1235        idat.A2 = &(snap_->atomData.aMat[atom2]);
1236      }
1237  
1184 –    if (storageLayout_ & DataStorage::dslElectroFrame) {
1185 –      idat.eFrame1 = &(snap_->atomData.electroFrame[atom1]);
1186 –      idat.eFrame2 = &(snap_->atomData.electroFrame[atom2]);
1187 –    }
1188 –
1238      if (storageLayout_ & DataStorage::dslTorque) {
1239        idat.t1 = &(snap_->atomData.torque[atom1]);
1240        idat.t2 = &(snap_->atomData.torque[atom2]);
1241      }
1242  
1243 +    if (storageLayout_ & DataStorage::dslDipole) {
1244 +      idat.dipole1 = &(snap_->atomData.dipole[atom1]);
1245 +      idat.dipole2 = &(snap_->atomData.dipole[atom2]);
1246 +    }
1247 +
1248 +    if (storageLayout_ & DataStorage::dslQuadrupole) {
1249 +      idat.quadrupole1 = &(snap_->atomData.quadrupole[atom1]);
1250 +      idat.quadrupole2 = &(snap_->atomData.quadrupole[atom2]);
1251 +    }
1252 +
1253      if (storageLayout_ & DataStorage::dslDensity) {    
1254        idat.rho1 = &(snap_->atomData.density[atom1]);
1255        idat.rho2 = &(snap_->atomData.density[atom2]);
# Line 1281 | Line 1340 | namespace OpenMD {
1340     * first element of pair is row-indexed CutoffGroup
1341     * second element of pair is column-indexed CutoffGroup
1342     */
1343 <  vector<pair<int, int> > ForceMatrixDecomposition::buildNeighborList() {
1344 <      
1345 <    vector<pair<int, int> > neighborList;
1343 >  void ForceMatrixDecomposition::buildNeighborList(vector<pair<int,int> >& neighborList) {
1344 >    
1345 >    neighborList.clear();
1346      groupCutoffs cuts;
1347      bool doAllPairs = false;
1348  
1349 +    RealType rList_ = (largestRcut_ + skinThickness_);
1350 +    RealType rcut, rcutsq, rlistsq;
1351 +    Snapshot* snap_ = sman_->getCurrentSnapshot();
1352 +    Mat3x3d box;
1353 +    Mat3x3d invBox;
1354 +
1355 +    Vector3d rs, scaled, dr;
1356 +    Vector3i whichCell;
1357 +    int cellIndex;
1358 +
1359   #ifdef IS_MPI
1360      cellListRow_.clear();
1361      cellListCol_.clear();
1362   #else
1363      cellList_.clear();
1364   #endif
1365 <
1366 <    RealType rList_ = (largestRcut_ + skinThickness_);
1367 <    Snapshot* snap_ = sman_->getCurrentSnapshot();
1368 <    Mat3x3d Hmat = snap_->getHmat();
1369 <    Vector3d Hx = Hmat.getColumn(0);
1370 <    Vector3d Hy = Hmat.getColumn(1);
1371 <    Vector3d Hz = Hmat.getColumn(2);
1372 <
1373 <    nCells_.x() = (int) ( Hx.length() )/ rList_;
1374 <    nCells_.y() = (int) ( Hy.length() )/ rList_;
1375 <    nCells_.z() = (int) ( Hz.length() )/ rList_;
1376 <
1365 >    
1366 >    if (!usePeriodicBoundaryConditions_) {
1367 >      box = snap_->getBoundingBox();
1368 >      invBox = snap_->getInvBoundingBox();
1369 >    } else {
1370 >      box = snap_->getHmat();
1371 >      invBox = snap_->getInvHmat();
1372 >    }
1373 >    
1374 >    Vector3d boxX = box.getColumn(0);
1375 >    Vector3d boxY = box.getColumn(1);
1376 >    Vector3d boxZ = box.getColumn(2);
1377 >    
1378 >    nCells_.x() = (int) ( boxX.length() )/ rList_;
1379 >    nCells_.y() = (int) ( boxY.length() )/ rList_;
1380 >    nCells_.z() = (int) ( boxZ.length() )/ rList_;
1381 >    
1382      // handle small boxes where the cell offsets can end up repeating cells
1383      
1384      if (nCells_.x() < 3) doAllPairs = true;
1385      if (nCells_.y() < 3) doAllPairs = true;
1386      if (nCells_.z() < 3) doAllPairs = true;
1387 <
1314 <    Mat3x3d invHmat = snap_->getInvHmat();
1315 <    Vector3d rs, scaled, dr;
1316 <    Vector3i whichCell;
1317 <    int cellIndex;
1387 >    
1388      int nCtot = nCells_.x() * nCells_.y() * nCells_.z();
1389 <
1389 >    
1390   #ifdef IS_MPI
1391      cellListRow_.resize(nCtot);
1392      cellListCol_.resize(nCtot);
1393   #else
1394      cellList_.resize(nCtot);
1395   #endif
1396 <
1396 >    
1397      if (!doAllPairs) {
1398   #ifdef IS_MPI
1399 <
1399 >      
1400        for (int i = 0; i < nGroupsInRow_; i++) {
1401          rs = cgRowData.position[i];
1402          
1403          // scaled positions relative to the box vectors
1404 <        scaled = invHmat * rs;
1404 >        scaled = invBox * rs;
1405          
1406          // wrap the vector back into the unit box by subtracting integer box
1407          // numbers
# Line 1359 | Line 1429 | namespace OpenMD {
1429          rs = cgColData.position[i];
1430          
1431          // scaled positions relative to the box vectors
1432 <        scaled = invHmat * rs;
1432 >        scaled = invBox * rs;
1433          
1434          // wrap the vector back into the unit box by subtracting integer box
1435          // numbers
# Line 1383 | Line 1453 | namespace OpenMD {
1453          // add this cutoff group to the list of groups in this cell;
1454          cellListCol_[cellIndex].push_back(i);
1455        }
1456 <    
1456 >      
1457   #else
1458        for (int i = 0; i < nGroups_; i++) {
1459          rs = snap_->cgData.position[i];
1460          
1461          // scaled positions relative to the box vectors
1462 <        scaled = invHmat * rs;
1462 >        scaled = invBox * rs;
1463          
1464          // wrap the vector back into the unit box by subtracting integer box
1465          // numbers
# Line 1458 | Line 1528 | namespace OpenMD {
1528                    // & column indicies and will divide labor in the
1529                    // force evaluation later.
1530                    dr = cgColData.position[(*j2)] - cgRowData.position[(*j1)];
1531 <                  snap_->wrapVector(dr);
1532 <                  cuts = getGroupCutoffs( (*j1), (*j2) );
1533 <                  if (dr.lengthSquare() < cuts.third) {
1531 >                  if (usePeriodicBoundaryConditions_) {
1532 >                    snap_->wrapVector(dr);
1533 >                  }
1534 >                  getGroupCutoffs( (*j1), (*j2), rcut, rcutsq, rlistsq );
1535 >                  if (dr.lengthSquare() < rlistsq) {
1536                      neighborList.push_back(make_pair((*j1), (*j2)));
1537                    }                  
1538                  }
# Line 1480 | Line 1552 | namespace OpenMD {
1552                    // allows atoms within a single cutoff group to
1553                    // interact with each other.
1554  
1483 –
1484 –
1555                    if (m2 != m1 || (*j2) >= (*j1) ) {
1556  
1557                      dr = snap_->cgData.position[(*j2)] - snap_->cgData.position[(*j1)];
1558 <                    snap_->wrapVector(dr);
1559 <                    cuts = getGroupCutoffs( (*j1), (*j2) );
1560 <                    if (dr.lengthSquare() < cuts.third) {
1558 >                    if (usePeriodicBoundaryConditions_) {
1559 >                      snap_->wrapVector(dr);
1560 >                    }
1561 >                    getGroupCutoffs( (*j1), (*j2), rcut, rcutsq, rlistsq );
1562 >                    if (dr.lengthSquare() < rlistsq) {
1563                        neighborList.push_back(make_pair((*j1), (*j2)));
1564                      }
1565                    }
# Line 1504 | Line 1576 | namespace OpenMD {
1576        for (int j1 = 0; j1 < nGroupsInRow_; j1++) {
1577          for (int j2 = 0; j2 < nGroupsInCol_; j2++) {    
1578            dr = cgColData.position[j2] - cgRowData.position[j1];
1579 <          snap_->wrapVector(dr);
1580 <          cuts = getGroupCutoffs( j1, j2 );
1581 <          if (dr.lengthSquare() < cuts.third) {
1579 >          if (usePeriodicBoundaryConditions_) {
1580 >            snap_->wrapVector(dr);
1581 >          }
1582 >          getGroupCutoffs( j1, j2, rcut, rcutsq, rlistsq);
1583 >          if (dr.lengthSquare() < rlistsq) {
1584              neighborList.push_back(make_pair(j1, j2));
1585            }
1586          }
# Line 1517 | Line 1591 | namespace OpenMD {
1591          // include self group interactions j2 == j1
1592          for (int j2 = j1; j2 < nGroups_; j2++) {
1593            dr = snap_->cgData.position[j2] - snap_->cgData.position[j1];
1594 <          snap_->wrapVector(dr);
1595 <          cuts = getGroupCutoffs( j1, j2 );
1596 <          if (dr.lengthSquare() < cuts.third) {
1594 >          if (usePeriodicBoundaryConditions_) {
1595 >            snap_->wrapVector(dr);
1596 >          }
1597 >          getGroupCutoffs( j1, j2, rcut, rcutsq, rlistsq );
1598 >          if (dr.lengthSquare() < rlistsq) {
1599              neighborList.push_back(make_pair(j1, j2));
1600            }
1601          }    
# Line 1532 | Line 1608 | namespace OpenMD {
1608      saved_CG_positions_.clear();
1609      for (int i = 0; i < nGroups_; i++)
1610        saved_CG_positions_.push_back(snap_->cgData.position[i]);
1535 –    
1536 –    return neighborList;
1611    }
1612   } //end namespace OpenMD

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