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root/OpenMD/branches/development/src/brains/ForceManager.cpp
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Comparing branches/development/src/brains/ForceManager.cpp (file contents):
Revision 1503 by gezelter, Sat Oct 2 19:54:41 2010 UTC vs.
Revision 1579 by gezelter, Thu Jun 9 20:26:29 2011 UTC

# Line 47 | Line 47
47   * @version 1.0
48   */
49  
50 +
51   #include "brains/ForceManager.hpp"
52   #include "primitives/Molecule.hpp"
52 – #include "UseTheForce/doForces_interface.h"
53   #define __OPENMD_C
54 – #include "UseTheForce/DarkSide/fInteractionMap.h"
54   #include "utils/simError.h"
55   #include "primitives/Bond.hpp"
56   #include "primitives/Bend.hpp"
57   #include "primitives/Torsion.hpp"
58   #include "primitives/Inversion.hpp"
59 + #include "nonbonded/NonBondedInteraction.hpp"
60 + #include "parallel/ForceMatrixDecomposition.hpp"
61  
62 + using namespace std;
63   namespace OpenMD {
64    
65 <  ForceManager::ForceManager(SimInfo * info) : info_(info),
66 <                                               NBforcesInitialized_(false) {
65 >  ForceManager::ForceManager(SimInfo * info) : info_(info) {
66 >    forceField_ = info_->getForceField();
67 >    interactionMan_ = new InteractionManager();
68 >    fDecomp_ = new ForceMatrixDecomposition(info_, interactionMan_);
69    }
70 <
71 <  void ForceManager::calcForces() {
70 >
71 >  /**
72 >   * setupCutoffs
73 >   *
74 >   * Sets the values of cutoffRadius, cutoffMethod, and cutoffPolicy
75 >   *
76 >   * cutoffRadius : realType
77 >   *  If the cutoffRadius was explicitly set, use that value.
78 >   *  If the cutoffRadius was not explicitly set:
79 >   *      Are there electrostatic atoms?  Use 12.0 Angstroms.
80 >   *      No electrostatic atoms?  Poll the atom types present in the
81 >   *      simulation for suggested cutoff values (e.g. 2.5 * sigma).
82 >   *      Use the maximum suggested value that was found.
83 >   *
84 >   * cutoffMethod : (one of HARD, SWITCHED, SHIFTED_FORCE, SHIFTED_POTENTIAL)
85 >   *      If cutoffMethod was explicitly set, use that choice.
86 >   *      If cutoffMethod was not explicitly set, use SHIFTED_FORCE
87 >   *
88 >   * cutoffPolicy : (one of MIX, MAX, TRADITIONAL)
89 >   *      If cutoffPolicy was explicitly set, use that choice.
90 >   *      If cutoffPolicy was not explicitly set, use TRADITIONAL
91 >   */
92 >  void ForceManager::setupCutoffs() {
93      
94 <    if (!info_->isFortranInitialized()) {
95 <      info_->update();
71 <    }
94 >    Globals* simParams_ = info_->getSimParams();
95 >    ForceFieldOptions& forceFieldOptions_ = forceField_->getForceFieldOptions();
96      
97 <    preCalculation();
98 <    
99 <    calcShortRangeInteraction();
97 >    if (simParams_->haveCutoffRadius()) {
98 >      rCut_ = simParams_->getCutoffRadius();
99 >    } else {      
100 >      if (info_->usesElectrostaticAtoms()) {
101 >        sprintf(painCave.errMsg,
102 >                "ForceManager::setupCutoffs: No value was set for the cutoffRadius.\n"
103 >                "\tOpenMD will use a default value of 12.0 angstroms"
104 >                "\tfor the cutoffRadius.\n");
105 >        painCave.isFatal = 0;
106 >        painCave.severity = OPENMD_INFO;
107 >        simError();
108 >        rCut_ = 12.0;
109 >      } else {
110 >        RealType thisCut;
111 >        set<AtomType*>::iterator i;
112 >        set<AtomType*> atomTypes;
113 >        atomTypes = info_->getSimulatedAtomTypes();        
114 >        for (i = atomTypes.begin(); i != atomTypes.end(); ++i) {
115 >          thisCut = interactionMan_->getSuggestedCutoffRadius((*i));
116 >          rCut_ = max(thisCut, rCut_);
117 >        }
118 >        sprintf(painCave.errMsg,
119 >                "ForceManager::setupCutoffs: No value was set for the cutoffRadius.\n"
120 >                "\tOpenMD will use %lf angstroms.\n",
121 >                rCut_);
122 >        painCave.isFatal = 0;
123 >        painCave.severity = OPENMD_INFO;
124 >        simError();
125 >      }
126 >      fDecomp_->setUserCutoff(rCut_);
127 >    }
128  
129 <    calcLongRangeInteraction();
129 >    map<string, CutoffMethod> stringToCutoffMethod;
130 >    stringToCutoffMethod["HARD"] = HARD;
131 >    stringToCutoffMethod["SWITCHED"] = SWITCHED;
132 >    stringToCutoffMethod["SHIFTED_POTENTIAL"] = SHIFTED_POTENTIAL;    
133 >    stringToCutoffMethod["SHIFTED_FORCE"] = SHIFTED_FORCE;
134 >  
135 >    if (simParams_->haveCutoffMethod()) {
136 >      string cutMeth = toUpperCopy(simParams_->getCutoffMethod());
137 >      map<string, CutoffMethod>::iterator i;
138 >      i = stringToCutoffMethod.find(cutMeth);
139 >      if (i == stringToCutoffMethod.end()) {
140 >        sprintf(painCave.errMsg,
141 >                "ForceManager::setupCutoffs: Could not find chosen cutoffMethod %s\n"
142 >                "\tShould be one of: "
143 >                "HARD, SWITCHED, SHIFTED_POTENTIAL, or SHIFTED_FORCE\n",
144 >                cutMeth.c_str());
145 >        painCave.isFatal = 1;
146 >        painCave.severity = OPENMD_ERROR;
147 >        simError();
148 >      } else {
149 >        cutoffMethod_ = i->second;
150 >      }
151 >    } else {
152 >      sprintf(painCave.errMsg,
153 >              "ForceManager::setupCutoffs: No value was set for the cutoffMethod.\n"
154 >              "\tOpenMD will use SHIFTED_FORCE.\n");
155 >      painCave.isFatal = 0;
156 >      painCave.severity = OPENMD_INFO;
157 >      simError();
158 >      cutoffMethod_ = SHIFTED_FORCE;        
159 >    }
160  
161 <    postCalculation();
161 >    map<string, CutoffPolicy> stringToCutoffPolicy;
162 >    stringToCutoffPolicy["MIX"] = MIX;
163 >    stringToCutoffPolicy["MAX"] = MAX;
164 >    stringToCutoffPolicy["TRADITIONAL"] = TRADITIONAL;    
165 >
166 >    std::string cutPolicy;
167 >    if (forceFieldOptions_.haveCutoffPolicy()){
168 >      cutPolicy = forceFieldOptions_.getCutoffPolicy();
169 >    }else if (simParams_->haveCutoffPolicy()) {
170 >      cutPolicy = simParams_->getCutoffPolicy();
171 >    }
172 >
173 >    if (!cutPolicy.empty()){
174 >      toUpper(cutPolicy);
175 >      map<string, CutoffPolicy>::iterator i;
176 >      i = stringToCutoffPolicy.find(cutPolicy);
177 >
178 >      if (i == stringToCutoffPolicy.end()) {
179 >        sprintf(painCave.errMsg,
180 >                "ForceManager::setupCutoffs: Could not find chosen cutoffPolicy %s\n"
181 >                "\tShould be one of: "
182 >                "MIX, MAX, or TRADITIONAL\n",
183 >                cutPolicy.c_str());
184 >        painCave.isFatal = 1;
185 >        painCave.severity = OPENMD_ERROR;
186 >        simError();
187 >      } else {
188 >        cutoffPolicy_ = i->second;
189 >      }
190 >    } else {
191 >      sprintf(painCave.errMsg,
192 >              "ForceManager::setupCutoffs: No value was set for the cutoffPolicy.\n"
193 >              "\tOpenMD will use TRADITIONAL.\n");
194 >      painCave.isFatal = 0;
195 >      painCave.severity = OPENMD_INFO;
196 >      simError();
197 >      cutoffPolicy_ = TRADITIONAL;        
198 >    }
199 >    fDecomp_->setCutoffPolicy(cutoffPolicy_);
200 >  }
201 >
202 >  /**
203 >   * setupSwitching
204 >   *
205 >   * Sets the values of switchingRadius and
206 >   *  If the switchingRadius was explicitly set, use that value (but check it)
207 >   *  If the switchingRadius was not explicitly set: use 0.85 * cutoffRadius_
208 >   */
209 >  void ForceManager::setupSwitching() {
210 >    Globals* simParams_ = info_->getSimParams();
211 >
212 >    // create the switching function object:
213 >    switcher_ = new SwitchingFunction();
214      
215 +    if (simParams_->haveSwitchingRadius()) {
216 +      rSwitch_ = simParams_->getSwitchingRadius();
217 +      if (rSwitch_ > rCut_) {        
218 +        sprintf(painCave.errMsg,
219 +                "ForceManager::setupSwitching: switchingRadius (%f) is larger "
220 +                "than the cutoffRadius(%f)\n", rSwitch_, rCut_);
221 +        painCave.isFatal = 1;
222 +        painCave.severity = OPENMD_ERROR;
223 +        simError();
224 +      }
225 +    } else {      
226 +      rSwitch_ = 0.85 * rCut_;
227 +      sprintf(painCave.errMsg,
228 +              "ForceManager::setupSwitching: No value was set for the switchingRadius.\n"
229 +              "\tOpenMD will use a default value of 85 percent of the cutoffRadius.\n"
230 +              "\tswitchingRadius = %f. for this simulation\n", rSwitch_);
231 +      painCave.isFatal = 0;
232 +      painCave.severity = OPENMD_WARNING;
233 +      simError();
234 +    }          
235 +    
236 +    // Default to cubic switching function.
237 +    sft_ = cubic;
238 +    if (simParams_->haveSwitchingFunctionType()) {
239 +      string funcType = simParams_->getSwitchingFunctionType();
240 +      toUpper(funcType);
241 +      if (funcType == "CUBIC") {
242 +        sft_ = cubic;
243 +      } else {
244 +        if (funcType == "FIFTH_ORDER_POLYNOMIAL") {
245 +          sft_ = fifth_order_poly;
246 +        } else {
247 +          // throw error        
248 +          sprintf( painCave.errMsg,
249 +                   "ForceManager::setupSwitching : Unknown switchingFunctionType. (Input file specified %s .)\n"
250 +                   "\tswitchingFunctionType must be one of: "
251 +                   "\"cubic\" or \"fifth_order_polynomial\".",
252 +                   funcType.c_str() );
253 +          painCave.isFatal = 1;
254 +          painCave.severity = OPENMD_ERROR;
255 +          simError();
256 +        }          
257 +      }
258 +    }
259 +    switcher_->setSwitchType(sft_);
260 +    switcher_->setSwitch(rSwitch_, rCut_);
261    }
262    
263 +  void ForceManager::initialize() {
264 +
265 +    if (!info_->isTopologyDone()) {
266 +      info_->update();
267 +      interactionMan_->setSimInfo(info_);
268 +      interactionMan_->initialize();
269 +
270 +      // We want to delay the cutoffs until after the interaction
271 +      // manager has set up the atom-atom interactions so that we can
272 +      // query them for suggested cutoff values
273 +
274 +      setupCutoffs();
275 +      setupSwitching();
276 +
277 +      info_->prepareTopology();      
278 +    }
279 +
280 +    ForceFieldOptions& fopts = forceField_->getForceFieldOptions();
281 +    
282 +    // Force fields can set options on how to scale van der Waals and electrostatic
283 +    // interactions for atoms connected via bonds, bends and torsions
284 +    // in this case the topological distance between atoms is:
285 +    // 0 = topologically unconnected
286 +    // 1 = bonded together
287 +    // 2 = connected via a bend
288 +    // 3 = connected via a torsion
289 +    
290 +    vdwScale_.reserve(4);
291 +    fill(vdwScale_.begin(), vdwScale_.end(), 0.0);
292 +
293 +    electrostaticScale_.reserve(4);
294 +    fill(electrostaticScale_.begin(), electrostaticScale_.end(), 0.0);
295 +
296 +    vdwScale_[0] = 1.0;
297 +    vdwScale_[1] = fopts.getvdw12scale();
298 +    vdwScale_[2] = fopts.getvdw13scale();
299 +    vdwScale_[3] = fopts.getvdw14scale();
300 +    
301 +    electrostaticScale_[0] = 1.0;
302 +    electrostaticScale_[1] = fopts.getelectrostatic12scale();
303 +    electrostaticScale_[2] = fopts.getelectrostatic13scale();
304 +    electrostaticScale_[3] = fopts.getelectrostatic14scale();    
305 +    
306 +    fDecomp_->distributeInitialData();
307 +
308 +    initialized_ = true;
309 +
310 +  }
311 +
312 +  void ForceManager::calcForces() {
313 +    
314 +    if (!initialized_) initialize();
315 +
316 +    preCalculation();  
317 +    shortRangeInteractions();
318 +    longRangeInteractions();
319 +    postCalculation();    
320 +  }
321 +  
322    void ForceManager::preCalculation() {
323      SimInfo::MoleculeIterator mi;
324      Molecule* mol;
# Line 87 | Line 326 | namespace OpenMD {
326      Atom* atom;
327      Molecule::RigidBodyIterator rbIter;
328      RigidBody* rb;
329 +    Molecule::CutoffGroupIterator ci;
330 +    CutoffGroup* cg;
331      
332      // forces are zeroed here, before any are accumulated.
92 –    // NOTE: do not rezero the forces in Fortran.
333      
334      for (mol = info_->beginMolecule(mi); mol != NULL;
335           mol = info_->nextMolecule(mi)) {
# Line 102 | Line 342 | namespace OpenMD {
342             rb = mol->nextRigidBody(rbIter)) {
343          rb->zeroForcesAndTorques();
344        }        
345 <          
345 >
346 >      if(info_->getNGlobalCutoffGroups() != info_->getNGlobalAtoms()){
347 >        for(cg = mol->beginCutoffGroup(ci); cg != NULL;
348 >            cg = mol->nextCutoffGroup(ci)) {
349 >          //calculate the center of mass of cutoff group
350 >          cg->updateCOM();
351 >        }
352 >      }      
353      }
354 <    
354 >  
355      // Zero out the stress tensor
356      tau *= 0.0;
357      
358    }
359    
360 <  void ForceManager::calcShortRangeInteraction() {
360 >  void ForceManager::shortRangeInteractions() {
361      Molecule* mol;
362      RigidBody* rb;
363      Bond* bond;
# Line 152 | Line 399 | namespace OpenMD {
399          RealType currBendPot = bend->getPotential();          
400          
401          bendPotential += bend->getPotential();
402 <        std::map<Bend*, BendDataSet>::iterator i = bendDataSets.find(bend);
402 >        map<Bend*, BendDataSet>::iterator i = bendDataSets.find(bend);
403          if (i == bendDataSets.end()) {
404            BendDataSet dataSet;
405            dataSet.prev.angle = dataSet.curr.angle = angle;
406            dataSet.prev.potential = dataSet.curr.potential = currBendPot;
407            dataSet.deltaV = 0.0;
408 <          bendDataSets.insert(std::map<Bend*, BendDataSet>::value_type(bend, dataSet));
408 >          bendDataSets.insert(map<Bend*, BendDataSet>::value_type(bend, dataSet));
409          }else {
410            i->second.prev.angle = i->second.curr.angle;
411            i->second.prev.potential = i->second.curr.potential;
# Line 175 | Line 422 | namespace OpenMD {
422          torsion->calcForce(angle);
423          RealType currTorsionPot = torsion->getPotential();
424          torsionPotential += torsion->getPotential();
425 <        std::map<Torsion*, TorsionDataSet>::iterator i = torsionDataSets.find(torsion);
425 >        map<Torsion*, TorsionDataSet>::iterator i = torsionDataSets.find(torsion);
426          if (i == torsionDataSets.end()) {
427            TorsionDataSet dataSet;
428            dataSet.prev.angle = dataSet.curr.angle = angle;
429            dataSet.prev.potential = dataSet.curr.potential = currTorsionPot;
430            dataSet.deltaV = 0.0;
431 <          torsionDataSets.insert(std::map<Torsion*, TorsionDataSet>::value_type(torsion, dataSet));
431 >          torsionDataSets.insert(map<Torsion*, TorsionDataSet>::value_type(torsion, dataSet));
432          }else {
433            i->second.prev.angle = i->second.curr.angle;
434            i->second.prev.potential = i->second.curr.potential;
# Line 191 | Line 438 | namespace OpenMD {
438                                     i->second.prev.potential);
439          }      
440        }      
441 <
441 >      
442        for (inversion = mol->beginInversion(inversionIter);
443             inversion != NULL;
444             inversion = mol->nextInversion(inversionIter)) {
# Line 199 | Line 446 | namespace OpenMD {
446          inversion->calcForce(angle);
447          RealType currInversionPot = inversion->getPotential();
448          inversionPotential += inversion->getPotential();
449 <        std::map<Inversion*, InversionDataSet>::iterator i = inversionDataSets.find(inversion);
449 >        map<Inversion*, InversionDataSet>::iterator i = inversionDataSets.find(inversion);
450          if (i == inversionDataSets.end()) {
451            InversionDataSet dataSet;
452            dataSet.prev.angle = dataSet.curr.angle = angle;
453            dataSet.prev.potential = dataSet.curr.potential = currInversionPot;
454            dataSet.deltaV = 0.0;
455 <          inversionDataSets.insert(std::map<Inversion*, InversionDataSet>::value_type(inversion, dataSet));
455 >          inversionDataSets.insert(map<Inversion*, InversionDataSet>::value_type(inversion, dataSet));
456          }else {
457            i->second.prev.angle = i->second.curr.angle;
458            i->second.prev.potential = i->second.curr.potential;
# Line 224 | Line 471 | namespace OpenMD {
471      curSnapshot->statData[Stats::BOND_POTENTIAL] = bondPotential;
472      curSnapshot->statData[Stats::BEND_POTENTIAL] = bendPotential;
473      curSnapshot->statData[Stats::DIHEDRAL_POTENTIAL] = torsionPotential;
474 <    curSnapshot->statData[Stats::INVERSION_POTENTIAL] = inversionPotential;
228 <    
474 >    curSnapshot->statData[Stats::INVERSION_POTENTIAL] = inversionPotential;    
475    }
476    
477 <  void ForceManager::calcLongRangeInteraction() {
478 <    Snapshot* curSnapshot;
479 <    DataStorage* config;
480 <    RealType* frc;
481 <    RealType* pos;
482 <    RealType* trq;
483 <    RealType* A;
484 <    RealType* electroFrame;
485 <    RealType* rc;
486 <    RealType* particlePot;
487 <    
242 <    //get current snapshot from SimInfo
243 <    curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
244 <    
245 <    //get array pointers
246 <    config = &(curSnapshot->atomData);
247 <    frc = config->getArrayPointer(DataStorage::dslForce);
248 <    pos = config->getArrayPointer(DataStorage::dslPosition);
249 <    trq = config->getArrayPointer(DataStorage::dslTorque);
250 <    A   = config->getArrayPointer(DataStorage::dslAmat);
251 <    electroFrame = config->getArrayPointer(DataStorage::dslElectroFrame);
252 <    particlePot = config->getArrayPointer(DataStorage::dslParticlePot);
477 >  void ForceManager::longRangeInteractions() {
478 >    // some of this initial stuff will go away:
479 >    Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
480 >    DataStorage* config = &(curSnapshot->atomData);
481 >    DataStorage* cgConfig = &(curSnapshot->cgData);
482 >    RealType* frc = config->getArrayPointer(DataStorage::dslForce);
483 >    RealType* pos = config->getArrayPointer(DataStorage::dslPosition);
484 >    RealType* trq = config->getArrayPointer(DataStorage::dslTorque);
485 >    RealType* A = config->getArrayPointer(DataStorage::dslAmat);
486 >    RealType* electroFrame = config->getArrayPointer(DataStorage::dslElectroFrame);
487 >    RealType* particlePot = config->getArrayPointer(DataStorage::dslParticlePot);
488  
489 <    //calculate the center of mass of cutoff group
255 <    SimInfo::MoleculeIterator mi;
256 <    Molecule* mol;
257 <    Molecule::CutoffGroupIterator ci;
258 <    CutoffGroup* cg;
259 <    Vector3d com;
260 <    std::vector<Vector3d> rcGroup;
489 >    // new stuff starts here:
490      
491 <    if(info_->getNCutoffGroups() > 0){
492 <      
493 <      for (mol = info_->beginMolecule(mi); mol != NULL;
494 <           mol = info_->nextMolecule(mi)) {
495 <        for(cg = mol->beginCutoffGroup(ci); cg != NULL;
496 <            cg = mol->nextCutoffGroup(ci)) {
497 <          cg->getCOM(com);
498 <          rcGroup.push_back(com);
499 <        }
500 <      }// end for (mol)
501 <      
502 <      rc = rcGroup[0].getArrayPointer();
491 >    fDecomp_->zeroWorkArrays();
492 >    fDecomp_->distributeData();
493 >    
494 >    int cg1, cg2, atom1, atom2, topoDist;
495 >    Vector3d d_grp, dag, d;
496 >    RealType rgrpsq, rgrp, r2, r;
497 >    RealType electroMult, vdwMult;
498 >    RealType vij;
499 >    Vector3d fij, fg;
500 >    tuple3<RealType, RealType, RealType> cuts;
501 >    RealType rCutSq;
502 >    bool in_switching_region;
503 >    RealType sw, dswdr, swderiv;
504 >    vector<int> atomListColumn, atomListRow, atomListLocal;
505 >    InteractionData idat;
506 >    SelfData sdat;
507 >    RealType mf;
508 >    potVec pot(0.0);
509 >    potVec longRangePotential(0.0);
510 >    RealType lrPot;
511 >    RealType vpair;
512 >
513 >    int loopStart, loopEnd;
514 >
515 >    loopEnd = PAIR_LOOP;
516 >    if (info_->requiresPrepair() ) {
517 >      loopStart = PREPAIR_LOOP;
518      } else {
519 <      // center of mass of the group is the same as position of the atom  
276 <      // if cutoff group does not exist
277 <      rc = pos;
519 >      loopStart = PAIR_LOOP;
520      }
521      
280 –    //initialize data before passing to fortran
281 –    RealType longRangePotential[LR_POT_TYPES];
282 –    RealType lrPot = 0.0;
283 –    int isError = 0;
522  
523 <    for (int i=0; i<LR_POT_TYPES;i++){
524 <      longRangePotential[i]=0.0; //Initialize array
523 >    for (int iLoop = loopStart; iLoop <= loopEnd; iLoop++) {
524 >    
525 >      if (iLoop == loopStart) {
526 >        bool update_nlist = fDecomp_->checkNeighborList();
527 >        if (update_nlist)
528 >          neighborList = fDecomp_->buildNeighborList();
529 >      }      
530 >        
531 >      for (vector<pair<int, int> >::iterator it = neighborList.begin();
532 >             it != neighborList.end(); ++it) {
533 >                
534 >        cg1 = (*it).first;
535 >        cg2 = (*it).second;
536 >        
537 >        cuts = fDecomp_->getGroupCutoffs(cg1, cg2);
538 >
539 >        d_grp  = fDecomp_->getIntergroupVector(cg1, cg2);
540 >        curSnapshot->wrapVector(d_grp);        
541 >        rgrpsq = d_grp.lengthSquare();
542 >
543 >        rCutSq = cuts.second;
544 >
545 >        if (rgrpsq < rCutSq) {
546 >          idat.rcut = &cuts.first;
547 >          if (iLoop == PAIR_LOOP) {
548 >            vij *= 0.0;
549 >            fij = V3Zero;
550 >          }
551 >          
552 >          in_switching_region = switcher_->getSwitch(rgrpsq, sw, dswdr,
553 >                                                     rgrp);
554 >
555 >          idat.sw = &sw;
556 >              
557 >          atomListRow = fDecomp_->getAtomsInGroupRow(cg1);
558 >          atomListColumn = fDecomp_->getAtomsInGroupColumn(cg2);
559 >
560 >          for (vector<int>::iterator ia = atomListRow.begin();
561 >               ia != atomListRow.end(); ++ia) {            
562 >            atom1 = (*ia);
563 >            
564 >            for (vector<int>::iterator jb = atomListColumn.begin();
565 >                 jb != atomListColumn.end(); ++jb) {              
566 >              atom2 = (*jb);
567 >              
568 >              cerr << "doing atoms " << atom1 << " " << atom2 << "\n";
569 >              if (!fDecomp_->skipAtomPair(atom1, atom2)) {
570 >                
571 >                vpair = 0.0;
572 >
573 >                cerr << "filling idat atoms " << atom1 << " " << atom2 << "\n";
574 >                idat = fDecomp_->fillInteractionData(atom1, atom2);
575 >                cerr << "done with idat\n";
576 >                
577 >                topoDist = fDecomp_->getTopologicalDistance(atom1, atom2);
578 >                vdwMult = vdwScale_[topoDist];
579 >                electroMult = electrostaticScale_[topoDist];
580 >
581 >                idat.vdwMult = &vdwMult;
582 >                idat.electroMult = &electroMult;
583 >                idat.pot = &pot;
584 >                idat.vpair = &vpair;
585 >
586 >                if (atomListRow.size() == 1 && atomListColumn.size() == 1) {
587 >                  idat.d = &d_grp;
588 >                  idat.r2 = &rgrpsq;
589 >                } else {
590 >                  d = fDecomp_->getInteratomicVector(atom1, atom2);
591 >                  curSnapshot->wrapVector( d );
592 >                  r2 = d.lengthSquare();
593 >                  idat.d = &d;
594 >                  idat.r2 = &r2;
595 >                }
596 >                
597 >                cerr << "d = " << d << "\n";
598 >                cerr << "r2 = " << r2 << "\n";
599 >                r = sqrt( r2 );
600 >                idat.rij = &r;
601 >              
602 >                if (iLoop == PREPAIR_LOOP) {
603 >                  interactionMan_->doPrePair(idat);
604 >                } else {
605 >                  cerr << "doing doPair " << atom1 << " " << atom2 << " " << r << "\n";
606 >                  interactionMan_->doPair(idat);
607 >                  fDecomp_->unpackInteractionData(idat, atom1, atom2);
608 >                  vij += *(idat.vpair);
609 >                  fij += *(idat.f1);
610 >                  tau -= outProduct( *(idat.d), *(idat.f1));
611 >                }
612 >              }
613 >            }
614 >          }
615 >
616 >          if (iLoop == PAIR_LOOP) {
617 >            if (in_switching_region) {
618 >              swderiv = vij * dswdr / rgrp;
619 >              fg = swderiv * d_grp;
620 >
621 >              fij += fg;
622 >
623 >              if (atomListRow.size() == 1 && atomListColumn.size() == 1) {
624 >                tau -= outProduct( *(idat.d), fg);
625 >              }
626 >          
627 >              for (vector<int>::iterator ia = atomListRow.begin();
628 >                   ia != atomListRow.end(); ++ia) {            
629 >                atom1 = (*ia);                
630 >                mf = fDecomp_->getMassFactorRow(atom1);
631 >                // fg is the force on atom ia due to cutoff group's
632 >                // presence in switching region
633 >                fg = swderiv * d_grp * mf;
634 >                fDecomp_->addForceToAtomRow(atom1, fg);
635 >
636 >                if (atomListRow.size() > 1) {
637 >                  if (info_->usesAtomicVirial()) {
638 >                    // find the distance between the atom
639 >                    // and the center of the cutoff group:
640 >                    dag = fDecomp_->getAtomToGroupVectorRow(atom1, cg1);
641 >                    tau -= outProduct(dag, fg);
642 >                  }
643 >                }
644 >              }
645 >              for (vector<int>::iterator jb = atomListColumn.begin();
646 >                   jb != atomListColumn.end(); ++jb) {              
647 >                atom2 = (*jb);
648 >                mf = fDecomp_->getMassFactorColumn(atom2);
649 >                // fg is the force on atom jb due to cutoff group's
650 >                // presence in switching region
651 >                fg = -swderiv * d_grp * mf;
652 >                fDecomp_->addForceToAtomColumn(atom2, fg);
653 >
654 >                if (atomListColumn.size() > 1) {
655 >                  if (info_->usesAtomicVirial()) {
656 >                    // find the distance between the atom
657 >                    // and the center of the cutoff group:
658 >                    dag = fDecomp_->getAtomToGroupVectorColumn(atom2, cg2);
659 >                    tau -= outProduct(dag, fg);
660 >                  }
661 >                }
662 >              }
663 >            }
664 >            //if (!SIM_uses_AtomicVirial) {
665 >            //  tau -= outProduct(d_grp, fij);
666 >            //}
667 >          }
668 >        }
669 >      }
670 >
671 >      if (iLoop == PREPAIR_LOOP) {
672 >        if (info_->requiresPrepair()) {            
673 >          fDecomp_->collectIntermediateData();
674 >
675 >          for (int atom1 = 0; atom1 < info_->getNAtoms(); atom1++) {
676 >            sdat = fDecomp_->fillSelfData(atom1);
677 >            interactionMan_->doPreForce(sdat);
678 >          }
679 >
680 >          fDecomp_->distributeIntermediateData();        
681 >        }
682 >      }
683 >
684      }
685      
686 <    doForceLoop(pos,
290 <                rc,
291 <                A,
292 <                electroFrame,
293 <                frc,
294 <                trq,
295 <                tau.getArrayPointer(),
296 <                longRangePotential,
297 <                particlePot,
298 <                &isError );
686 >    fDecomp_->collectData();
687      
688 <    if( isError ){
689 <      sprintf( painCave.errMsg,
690 <               "Error returned from the fortran force calculation.\n" );
691 <      painCave.isFatal = 1;
692 <      simError();
688 >    if ( info_->requiresSkipCorrection() ) {
689 >      
690 >      for (int atom1 = 0; atom1 < fDecomp_->getNAtomsInRow(); atom1++) {
691 >
692 >        vector<int> skipList = fDecomp_->getSkipsForAtom( atom1 );
693 >        
694 >        for (vector<int>::iterator jb = skipList.begin();
695 >             jb != skipList.end(); ++jb) {        
696 >    
697 >          atom2 = (*jb);
698 >          idat = fDecomp_->fillSkipData(atom1, atom2);
699 >          interactionMan_->doSkipCorrection(idat);
700 >
701 >        }
702 >      }
703      }
704 <    for (int i=0; i<LR_POT_TYPES;i++){
705 <      lrPot += longRangePotential[i]; //Quick hack
704 >    
705 >    if (info_->requiresSelfCorrection()) {
706 >
707 >      for (int atom1 = 0; atom1 < info_->getNAtoms(); atom1++) {          
708 >        sdat = fDecomp_->fillSelfData(atom1);
709 >        interactionMan_->doSelfCorrection(sdat);
710 >      }
711 >
712      }
713 <        
713 >
714 >    longRangePotential = fDecomp_->getLongRangePotential();
715 >    lrPot = longRangePotential.sum();
716 >
717      //store the tau and long range potential    
718      curSnapshot->statData[Stats::LONG_RANGE_POTENTIAL] = lrPot;
719 <    curSnapshot->statData[Stats::VANDERWAALS_POTENTIAL] = longRangePotential[VDW_POT];
720 <    curSnapshot->statData[Stats::ELECTROSTATIC_POTENTIAL] = longRangePotential[ELECTROSTATIC_POT];
719 >    curSnapshot->statData[Stats::VANDERWAALS_POTENTIAL] = longRangePotential[VANDERWAALS_FAMILY];
720 >    curSnapshot->statData[Stats::ELECTROSTATIC_POTENTIAL] = longRangePotential[ELECTROSTATIC_FAMILY];
721    }
722  
723    

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