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Comparing branches/development/src/brains/ForceManager.cpp (file contents):
Revision 1576 by gezelter, Wed Jun 8 16:05:07 2011 UTC vs.
Revision 1612 by gezelter, Fri Aug 12 19:59:56 2011 UTC

# Line 59 | Line 59
59   #include "nonbonded/NonBondedInteraction.hpp"
60   #include "parallel/ForceMatrixDecomposition.hpp"
61  
62 + #include <cstdio>
63 + #include <iostream>
64 + #include <iomanip>
65 +
66   using namespace std;
67   namespace OpenMD {
68    
69    ForceManager::ForceManager(SimInfo * info) : info_(info) {
70      forceField_ = info_->getForceField();
71 <    fDecomp_ = new ForceMatrixDecomposition(info_);
71 >    interactionMan_ = new InteractionManager();
72 >    fDecomp_ = new ForceMatrixDecomposition(info_, interactionMan_);
73    }
74  
75    /**
76     * setupCutoffs
77     *
78 <   * Sets the values of cutoffRadius, cutoffMethod, and cutoffPolicy
78 >   * Sets the values of cutoffRadius, switchingRadius, cutoffMethod,
79 >   * and cutoffPolicy
80     *
81     * cutoffRadius : realType
82     *  If the cutoffRadius was explicitly set, use that value.
# Line 80 | Line 86 | namespace OpenMD {
86     *      simulation for suggested cutoff values (e.g. 2.5 * sigma).
87     *      Use the maximum suggested value that was found.
88     *
89 <   * cutoffMethod : (one of HARD, SWITCHED, SHIFTED_FORCE, SHIFTED_POTENTIAL)
89 >   * cutoffMethod : (one of HARD, SWITCHED, SHIFTED_FORCE,
90 >   *                        or SHIFTED_POTENTIAL)
91     *      If cutoffMethod was explicitly set, use that choice.
92     *      If cutoffMethod was not explicitly set, use SHIFTED_FORCE
93     *
94     * cutoffPolicy : (one of MIX, MAX, TRADITIONAL)
95     *      If cutoffPolicy was explicitly set, use that choice.
96     *      If cutoffPolicy was not explicitly set, use TRADITIONAL
97 +   *
98 +   * switchingRadius : realType
99 +   *  If the cutoffMethod was set to SWITCHED:
100 +   *      If the switchingRadius was explicitly set, use that value
101 +   *          (but do a sanity check first).
102 +   *      If the switchingRadius was not explicitly set: use 0.85 *
103 +   *      cutoffRadius_
104 +   *  If the cutoffMethod was not set to SWITCHED:
105 +   *      Set switchingRadius equal to cutoffRadius for safety.
106     */
107    void ForceManager::setupCutoffs() {
108      
# Line 121 | Line 137 | namespace OpenMD {
137          painCave.isFatal = 0;
138          painCave.severity = OPENMD_INFO;
139          simError();
140 <      }            
140 >      }
141      }
142  
143 +    fDecomp_->setUserCutoff(rCut_);
144 +    interactionMan_->setCutoffRadius(rCut_);
145 +
146      map<string, CutoffMethod> stringToCutoffMethod;
147      stringToCutoffMethod["HARD"] = HARD;
148      stringToCutoffMethod["SWITCHED"] = SWITCHED;
# Line 194 | Line 213 | namespace OpenMD {
213        simError();
214        cutoffPolicy_ = TRADITIONAL;        
215      }
197  }
216  
217 <  /**
218 <   * setupSwitching
219 <   *
220 <   * Sets the values of switchingRadius and
221 <   *  If the switchingRadius was explicitly set, use that value (but check it)
222 <   *  If the switchingRadius was not explicitly set: use 0.85 * cutoffRadius_
223 <   */
224 <  void ForceManager::setupSwitching() {
225 <    Globals* simParams_ = info_->getSimParams();
226 <    
227 <    if (simParams_->haveSwitchingRadius()) {
228 <      rSwitch_ = simParams_->getSwitchingRadius();
229 <      if (rSwitch_ > rCut_) {        
217 >    fDecomp_->setCutoffPolicy(cutoffPolicy_);
218 >        
219 >    // create the switching function object:
220 >
221 >    switcher_ = new SwitchingFunction();
222 >  
223 >    if (cutoffMethod_ == SWITCHED) {
224 >      if (simParams_->haveSwitchingRadius()) {
225 >        rSwitch_ = simParams_->getSwitchingRadius();
226 >        if (rSwitch_ > rCut_) {        
227 >          sprintf(painCave.errMsg,
228 >                  "ForceManager::setupCutoffs: switchingRadius (%f) is larger "
229 >                  "than the cutoffRadius(%f)\n", rSwitch_, rCut_);
230 >          painCave.isFatal = 1;
231 >          painCave.severity = OPENMD_ERROR;
232 >          simError();
233 >        }
234 >      } else {      
235 >        rSwitch_ = 0.85 * rCut_;
236          sprintf(painCave.errMsg,
237 <                "ForceManager::setupSwitching: switchingRadius (%f) is larger than cutoffRadius(%f)\n",
238 <                rSwitch_, rCut_);
239 <        painCave.isFatal = 1;
240 <        painCave.severity = OPENMD_ERROR;
237 >                "ForceManager::setupCutoffs: No value was set for the switchingRadius.\n"
238 >                "\tOpenMD will use a default value of 85 percent of the cutoffRadius.\n"
239 >                "\tswitchingRadius = %f. for this simulation\n", rSwitch_);
240 >        painCave.isFatal = 0;
241 >        painCave.severity = OPENMD_WARNING;
242          simError();
243        }
244 <    } else {      
245 <      rSwitch_ = 0.85 * rCut_;
246 <      sprintf(painCave.errMsg,
247 <              "ForceManager::setupSwitching: No value was set for the switchingRadius.\n"
248 <              "\tOpenMD will use a default value of 85 percent of the cutoffRadius.\n"
249 <              "\tswitchingRadius = %f. for this simulation\n", rSwitch_);
250 <      painCave.isFatal = 0;
251 <      painCave.severity = OPENMD_WARNING;
252 <      simError();
253 <    }          
244 >    } else {
245 >      if (simParams_->haveSwitchingRadius()) {
246 >        map<string, CutoffMethod>::const_iterator it;
247 >        string theMeth;
248 >        for (it = stringToCutoffMethod.begin();
249 >             it != stringToCutoffMethod.end(); ++it) {
250 >          if (it->second == cutoffMethod_) {
251 >            theMeth = it->first;
252 >            break;
253 >          }
254 >        }
255 >        sprintf(painCave.errMsg,
256 >                "ForceManager::setupCutoffs: the cutoffMethod (%s)\n"
257 >                "\tis not set to SWITCHED, so switchingRadius value\n"
258 >                "\twill be ignored for this simulation\n", theMeth.c_str());
259 >        painCave.isFatal = 0;
260 >        painCave.severity = OPENMD_WARNING;
261 >        simError();
262 >      }
263 >
264 >      rSwitch_ = rCut_;
265 >    }
266      
267 +    // Default to cubic switching function.
268 +    sft_ = cubic;
269      if (simParams_->haveSwitchingFunctionType()) {
270        string funcType = simParams_->getSwitchingFunctionType();
271        toUpper(funcType);
# Line 250 | Line 289 | namespace OpenMD {
289      }
290      switcher_->setSwitchType(sft_);
291      switcher_->setSwitch(rSwitch_, rCut_);
292 +    interactionMan_->setSwitchingRadius(rSwitch_);
293    }
294    
295    void ForceManager::initialize() {
296  
297      if (!info_->isTopologyDone()) {
298 +
299        info_->update();
300        interactionMan_->setSimInfo(info_);
301        interactionMan_->initialize();
# Line 262 | Line 303 | namespace OpenMD {
303        // We want to delay the cutoffs until after the interaction
304        // manager has set up the atom-atom interactions so that we can
305        // query them for suggested cutoff values
265
306        setupCutoffs();
267      setupSwitching();
307  
308        info_->prepareTopology();      
309      }
310  
311      ForceFieldOptions& fopts = forceField_->getForceFieldOptions();
312      
313 <    // Force fields can set options on how to scale van der Waals and electrostatic
314 <    // interactions for atoms connected via bonds, bends and torsions
315 <    // in this case the topological distance between atoms is:
313 >    // Force fields can set options on how to scale van der Waals and
314 >    // electrostatic interactions for atoms connected via bonds, bends
315 >    // and torsions in this case the topological distance between
316 >    // atoms is:
317      // 0 = topologically unconnected
318      // 1 = bonded together
319      // 2 = connected via a bend
# Line 325 | Line 365 | namespace OpenMD {
365      
366      for (mol = info_->beginMolecule(mi); mol != NULL;
367           mol = info_->nextMolecule(mi)) {
368 <      for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
368 >      for(atom = mol->beginAtom(ai); atom != NULL;
369 >          atom = mol->nextAtom(ai)) {
370          atom->zeroForcesAndTorques();
371        }
372 <          
372 >      
373        //change the positions of atoms which belong to the rigidbodies
374        for (rb = mol->beginRigidBody(rbIter); rb != NULL;
375             rb = mol->nextRigidBody(rbIter)) {
376          rb->zeroForcesAndTorques();
377        }        
378 <
378 >      
379        if(info_->getNGlobalCutoffGroups() != info_->getNGlobalAtoms()){
380          for(cg = mol->beginCutoffGroup(ci); cg != NULL;
381              cg = mol->nextCutoffGroup(ci)) {
# Line 343 | Line 384 | namespace OpenMD {
384          }
385        }      
386      }
387 <  
387 >    
388      // Zero out the stress tensor
389      tau *= 0.0;
390      
# Line 397 | Line 438 | namespace OpenMD {
438            dataSet.prev.angle = dataSet.curr.angle = angle;
439            dataSet.prev.potential = dataSet.curr.potential = currBendPot;
440            dataSet.deltaV = 0.0;
441 <          bendDataSets.insert(map<Bend*, BendDataSet>::value_type(bend, dataSet));
441 >          bendDataSets.insert(map<Bend*, BendDataSet>::value_type(bend,
442 >                                                                  dataSet));
443          }else {
444            i->second.prev.angle = i->second.curr.angle;
445            i->second.prev.potential = i->second.curr.potential;
# Line 468 | Line 510 | namespace OpenMD {
510    
511    void ForceManager::longRangeInteractions() {
512  
471    // some of this initial stuff will go away:
513      Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
514      DataStorage* config = &(curSnapshot->atomData);
515      DataStorage* cgConfig = &(curSnapshot->cgData);
475    RealType* frc = config->getArrayPointer(DataStorage::dslForce);
476    RealType* pos = config->getArrayPointer(DataStorage::dslPosition);
477    RealType* trq = config->getArrayPointer(DataStorage::dslTorque);
478    RealType* A = config->getArrayPointer(DataStorage::dslAmat);
479    RealType* electroFrame = config->getArrayPointer(DataStorage::dslElectroFrame);
480    RealType* particlePot = config->getArrayPointer(DataStorage::dslParticlePot);
481    RealType* rc;    
516  
517 <    if(info_->getNGlobalCutoffGroups() != info_->getNGlobalAtoms()){
518 <      rc = cgConfig->getArrayPointer(DataStorage::dslPosition);
517 >    //calculate the center of mass of cutoff group
518 >
519 >    SimInfo::MoleculeIterator mi;
520 >    Molecule* mol;
521 >    Molecule::CutoffGroupIterator ci;
522 >    CutoffGroup* cg;
523 >
524 >    if(info_->getNCutoffGroups() > 0){      
525 >      for (mol = info_->beginMolecule(mi); mol != NULL;
526 >           mol = info_->nextMolecule(mi)) {
527 >        for(cg = mol->beginCutoffGroup(ci); cg != NULL;
528 >            cg = mol->nextCutoffGroup(ci)) {
529 >          cg->updateCOM();
530 >        }
531 >      }      
532      } else {
533        // center of mass of the group is the same as position of the atom  
534        // if cutoff group does not exist
535 <      rc = pos;
535 >      cgConfig->position = config->position;
536      }
537 <    
491 <    // new stuff starts here:
537 >
538      fDecomp_->zeroWorkArrays();
539      fDecomp_->distributeData();
540 <
541 <    int cg1, cg2, atom1, atom2;
542 <    Vector3d d_grp, dag;
543 <    RealType rgrpsq, rgrp;
540 >    
541 >    int cg1, cg2, atom1, atom2, topoDist;
542 >    Vector3d d_grp, dag, d;
543 >    RealType rgrpsq, rgrp, r2, r;
544 >    RealType electroMult, vdwMult;
545      RealType vij;
546 <    Vector3d fij, fg;
546 >    Vector3d fij, fg, f1;
547      tuple3<RealType, RealType, RealType> cuts;
548      RealType rCutSq;
549      bool in_switching_region;
# Line 505 | Line 552 | namespace OpenMD {
552      InteractionData idat;
553      SelfData sdat;
554      RealType mf;
508    potVec pot(0.0);
509    potVec longRangePotential(0.0);
555      RealType lrPot;
556 +    RealType vpair;
557 +    potVec longRangePotential(0.0);
558 +    potVec workPot(0.0);
559  
560      int loopStart, loopEnd;
561  
562 +    idat.vdwMult = &vdwMult;
563 +    idat.electroMult = &electroMult;
564 +    idat.pot = &workPot;
565 +    sdat.pot = fDecomp_->getEmbeddingPotential();
566 +    idat.vpair = &vpair;
567 +    idat.f1 = &f1;
568 +    idat.sw = &sw;
569 +    idat.shiftedPot = (cutoffMethod_ == SHIFTED_POTENTIAL) ? true : false;
570 +    idat.shiftedForce = (cutoffMethod_ == SHIFTED_FORCE) ? true : false;
571 +    
572      loopEnd = PAIR_LOOP;
573      if (info_->requiresPrepair() ) {
574        loopStart = PREPAIR_LOOP;
575      } else {
576        loopStart = PAIR_LOOP;
577      }
578 <
579 <    for (int iLoop = loopStart; iLoop < loopEnd; iLoop++) {
580 <      
578 >  
579 >    for (int iLoop = loopStart; iLoop <= loopEnd; iLoop++) {
580 >    
581        if (iLoop == loopStart) {
582          bool update_nlist = fDecomp_->checkNeighborList();
583          if (update_nlist)
584            neighborList = fDecomp_->buildNeighborList();
585 <      }
585 >      }            
586  
587        for (vector<pair<int, int> >::iterator it = neighborList.begin();
588               it != neighborList.end(); ++it) {
589 <        
589 >                
590          cg1 = (*it).first;
591          cg2 = (*it).second;
592          
# Line 541 | Line 599 | namespace OpenMD {
599          rCutSq = cuts.second;
600  
601          if (rgrpsq < rCutSq) {
602 <          *(idat.rcut) = cuts.first;
602 >          idat.rcut = &cuts.first;
603            if (iLoop == PAIR_LOOP) {
604 <            vij *= 0.0;
604 >            vij = 0.0;
605              fij = V3Zero;
606            }
607            
608 <          in_switching_region = switcher_->getSwitch(rgrpsq, *(idat.sw), dswdr,
608 >          in_switching_region = switcher_->getSwitch(rgrpsq, sw, dswdr,
609                                                       rgrp);
610                
611            atomListRow = fDecomp_->getAtomsInGroupRow(cg1);
# Line 560 | Line 618 | namespace OpenMD {
618              for (vector<int>::iterator jb = atomListColumn.begin();
619                   jb != atomListColumn.end(); ++jb) {              
620                atom2 = (*jb);
621 <              
621 >
622                if (!fDecomp_->skipAtomPair(atom1, atom2)) {
623 +                vpair = 0.0;
624 +                workPot = 0.0;
625 +                f1 = V3Zero;
626 +
627 +                fDecomp_->fillInteractionData(idat, atom1, atom2);
628                  
629 <                pot *= 0.0;
629 >                topoDist = fDecomp_->getTopologicalDistance(atom1, atom2);
630 >                vdwMult = vdwScale_[topoDist];
631 >                electroMult = electrostaticScale_[topoDist];
632  
568                idat = fDecomp_->fillInteractionData(atom1, atom2);
569                *(idat.pot) = pot;
570
633                  if (atomListRow.size() == 1 && atomListColumn.size() == 1) {
634 <                  *(idat.d) = d_grp;
635 <                  *(idat.r2) = rgrpsq;
634 >                  idat.d = &d_grp;
635 >                  idat.r2 = &rgrpsq;
636                  } else {
637 <                  *(idat.d) = fDecomp_->getInteratomicVector(atom1, atom2);
638 <                  curSnapshot->wrapVector( *(idat.d) );
639 <                  *(idat.r2) = idat.d->lengthSquare();
637 >                  d = fDecomp_->getInteratomicVector(atom1, atom2);
638 >                  curSnapshot->wrapVector( d );
639 >                  r2 = d.lengthSquare();
640 >                  idat.d = &d;
641 >                  idat.r2 = &r2;
642                  }
579                
580                *(idat.rij) = sqrt( *(idat.r2) );
643                
644 +                r = sqrt( *(idat.r2) );
645 +                idat.rij = &r;
646 +              
647                  if (iLoop == PREPAIR_LOOP) {
648                    interactionMan_->doPrePair(idat);
649                  } else {
650                    interactionMan_->doPair(idat);
651                    fDecomp_->unpackInteractionData(idat, atom1, atom2);
652 <                  vij += *(idat.vpair);
653 <                  fij += *(idat.f1);
654 <                  tau -= outProduct( *(idat.d), *(idat.f1));
652 >
653 >                  vij += vpair;
654 >                  fij += f1;
655 >                  tau -= outProduct( *(idat.d), f1);
656                  }
657                }
658              }
# Line 596 | Line 662 | namespace OpenMD {
662              if (in_switching_region) {
663                swderiv = vij * dswdr / rgrp;
664                fg = swderiv * d_grp;
599
665                fij += fg;
666  
667                if (atomListRow.size() == 1 && atomListColumn.size() == 1) {
# Line 648 | Line 713 | namespace OpenMD {
713        }
714  
715        if (iLoop == PREPAIR_LOOP) {
716 <        if (info_->requiresPrepair()) {            
716 >        if (info_->requiresPrepair()) {
717 >
718            fDecomp_->collectIntermediateData();
719  
720            for (int atom1 = 0; atom1 < info_->getNAtoms(); atom1++) {
721 <            sdat = fDecomp_->fillSelfData(atom1);
721 >            fDecomp_->fillSelfData(sdat, atom1);
722              interactionMan_->doPreForce(sdat);
723            }
724  
725 <          fDecomp_->distributeIntermediateData();        
725 >          fDecomp_->distributeIntermediateData();
726 >
727          }
728        }
729  
730      }
731      
732      fDecomp_->collectData();
666    
667    if ( info_->requiresSkipCorrection() ) {
668      
669      for (int atom1 = 0; atom1 < fDecomp_->getNAtomsInRow(); atom1++) {
670
671        vector<int> skipList = fDecomp_->getSkipsForRowAtom( atom1 );
733          
673        for (vector<int>::iterator jb = skipList.begin();
674             jb != skipList.end(); ++jb) {        
675    
676          atom2 = (*jb);
677          idat = fDecomp_->fillSkipData(atom1, atom2);
678          interactionMan_->doSkipCorrection(idat);
679
680        }
681      }
682    }
683    
734      if (info_->requiresSelfCorrection()) {
735  
736        for (int atom1 = 0; atom1 < info_->getNAtoms(); atom1++) {          
737 <        sdat = fDecomp_->fillSelfData(atom1);
737 >        fDecomp_->fillSelfData(sdat, atom1);
738          interactionMan_->doSelfCorrection(sdat);
739        }
740  
741      }
742  
743 <    longRangePotential = fDecomp_->getLongRangePotential();
743 >    longRangePotential = *(fDecomp_->getEmbeddingPotential()) +
744 >      *(fDecomp_->getPairwisePotential());
745 >
746      lrPot = longRangePotential.sum();
747  
748      //store the tau and long range potential    

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