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Revision 1481 by gezelter, Mon Jul 26 21:55:18 2010 UTC vs.
Revision 1710 by gezelter, Fri May 18 21:44:02 2012 UTC

# Line 36 | Line 36
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).          
39 < * [4]  Vardeman & Gezelter, in progress (2009).                        
39 > * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
40 > * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
41   */
42  
43   #include <stdio.h>
# Line 50 | Line 51 | namespace OpenMD {
51  
52   namespace OpenMD {
53  
54 <  bool EAM::initialized_ = false;
55 <  RealType EAM::eamRcut_ = 0.0;
55 <  EAMMixingMethod EAM::mixMeth_ = eamJohnson;
56 <  ForceField* EAM::forceField_ = NULL;
57 <  map<int, AtomType*> EAM::EAMlist;
58 <  map<AtomType*, EAMAtomData> EAM::EAMMap;
59 <  map<pair<AtomType*, AtomType*>, EAMInteractionData> EAM::MixingMap;
60 <
54 >  EAM::EAM() : name_("EAM"), initialized_(false), forceField_(NULL),
55 >               mixMeth_(eamJohnson), eamRcut_(0.0), haveCutoffRadius_(false) {}
56    
57 <  EAM* EAM::_instance = NULL;
57 >  CubicSpline* EAM::getPhi(AtomType* atomType1, AtomType* atomType2) {  
58 >    EAMAdapter ea1 = EAMAdapter(atomType1);
59 >    EAMAdapter ea2 = EAMAdapter(atomType2);
60 >    CubicSpline* z1 = ea1.getZ();
61 >    CubicSpline* z2 = ea2.getZ();
62  
64 –  EAM* EAM::Instance() {
65 –    if (!_instance) {
66 –      _instance = new EAM();
67 –    }
68 –    return _instance;
69 –  }
70 –  
71 –  EAMParam EAM::getEAMParam(AtomType* atomType) {
72 –    
73 –    // Do sanity checking on the AtomType we were passed before
74 –    // building any data structures:
75 –    if (!atomType->isEAM()) {
76 –      sprintf( painCave.errMsg,
77 –               "EAM::getEAMParam was passed an atomType (%s) that does not\n"
78 –               "\tappear to be an embedded atom method (EAM) atom.\n",
79 –               atomType->getName().c_str());
80 –      painCave.severity = OPENMD_ERROR;
81 –      painCave.isFatal = 1;
82 –      simError();
83 –    }
84 –    
85 –    GenericData* data = atomType->getPropertyByName("EAM");
86 –    if (data == NULL) {
87 –      sprintf( painCave.errMsg, "EAM::getEAMParam could not find EAM\n"
88 –               "\tparameters for atomType %s.\n",
89 –               atomType->getName().c_str());
90 –      painCave.severity = OPENMD_ERROR;
91 –      painCave.isFatal = 1;
92 –      simError();
93 –    }
94 –    
95 –    EAMParamGenericData* eamData = dynamic_cast<EAMParamGenericData*>(data);
96 –    if (eamData == NULL) {
97 –      sprintf( painCave.errMsg,
98 –               "EAM::getEAMParam could not convert GenericData to EAMParam for\n"
99 –               "\tatom type %s\n", atomType->getName().c_str());
100 –      painCave.severity = OPENMD_ERROR;
101 –      painCave.isFatal = 1;
102 –      simError();          
103 –    }
104 –    
105 –    return eamData->getData();
106 –  }
107 –
108 –  CubicSpline* EAM::getZ(AtomType* atomType) {    
109 –    EAMParam eamParam = getEAMParam(atomType);
110 –    int nr = eamParam.nr;
111 –    RealType dr = eamParam.dr;
112 –    vector<RealType> rvals;
113 –    
114 –    for (int i = 0; i < nr; i++) rvals.push_back(i * dr);
115 –      
116 –    CubicSpline* cs = new CubicSpline();
117 –    cs->addPoints(rvals, eamParam.Z);
118 –    return cs;
119 –  }
120 –
121 –  RealType EAM::getRcut(AtomType* atomType) {    
122 –    EAMParam eamParam = getEAMParam(atomType);
123 –    return eamParam.rcut;
124 –  }
125 –
126 –  CubicSpline* EAM::getRho(AtomType* atomType) {    
127 –    EAMParam eamParam = getEAMParam(atomType);
128 –    int nr = eamParam.nr;
129 –    RealType dr = eamParam.dr;
130 –    vector<RealType> rvals;
131 –    
132 –    for (int i = 0; i < nr; i++) rvals.push_back(i * dr);
133 –      
134 –    CubicSpline* cs = new CubicSpline();
135 –    cs->addPoints(rvals, eamParam.rho);
136 –    return cs;
137 –  }
138 –
139 –  CubicSpline* EAM::getF(AtomType* atomType) {    
140 –    EAMParam eamParam = getEAMParam(atomType);
141 –    int nrho = eamParam.nrho;
142 –    RealType drho = eamParam.drho;
143 –    vector<RealType> rhovals;
144 –    vector<RealType> scaledF;
145 –    
146 –    for (int i = 0; i < nrho; i++) {
147 –      rhovals.push_back(i * drho);
148 –      scaledF.push_back( eamParam.F[i] * 23.06054 );
149 –    }
150 –      
151 –    CubicSpline* cs = new CubicSpline();
152 –    cs->addPoints(rhovals, eamParam.F);
153 –    return cs;
154 –  }
155 –  
156 –  CubicSpline* EAM::getPhi(AtomType* atomType1, AtomType* atomType2) {    
157 –    EAMParam eamParam1 = getEAMParam(atomType1);
158 –    EAMParam eamParam2 = getEAMParam(atomType2);
159 –    CubicSpline* z1 = getZ(atomType1);
160 –    CubicSpline* z2 = getZ(atomType2);
161 –
63      // make the r grid:
64  
65  
66      // we need phi out to the largest value we'll encounter in the radial space;
67      
68      RealType rmax = 0.0;
69 <    rmax = max(rmax, eamParam1.rcut);
70 <    rmax = max(rmax, eamParam1.nr * eamParam1.dr);
69 >    rmax = max(rmax, ea1.getRcut());
70 >    rmax = max(rmax, ea1.getNr() * ea1.getDr());
71  
72 <    rmax = max(rmax, eamParam2.rcut);
73 <    rmax = max(rmax, eamParam2.nr * eamParam2.dr);
72 >    rmax = max(rmax, ea2.getRcut());
73 >    rmax = max(rmax, ea2.getNr() * ea2.getDr());
74  
75      // use the smallest dr (finest grid) to build our grid:
76  
77 <    RealType dr = min(eamParam1.dr, eamParam2.dr);
77 >    RealType dr = min(ea1.getDr(), ea2.getDr());
78  
79      int nr = int(rmax/dr + 0.5);
80  
# Line 192 | Line 93 | namespace OpenMD {
93      for (int i = 1; i < rvals.size(); i++ ) {
94        r = rvals[i];
95  
96 <      // only use z(r) if we're inside this atoms cutoff radius, otherwise, we'll use zero for the charge.
97 <      // This effectively means that our phi grid goes out beyond the cutoff of the pair potential
96 >      // only use z(r) if we're inside this atom's cutoff radius,
97 >      // otherwise, we'll use zero for the charge.  This effectively
98 >      // means that our phi grid goes out beyond the cutoff of the
99 >      // pair potential
100  
101 <      zi = r <= eamParam1.rcut ? z1->getValueAt(r) : 0.0;
102 <      zj = r <= eamParam2.rcut ? z2->getValueAt(r) : 0.0;
101 >      zi = r <= ea1.getRcut() ? z1->getValueAt(r) : 0.0;
102 >      zj = r <= ea2.getRcut() ? z2->getValueAt(r) : 0.0;
103  
104        phi = 331.999296 * (zi * zj) / r;
105  
# Line 208 | Line 111 | namespace OpenMD {
111      return cs;
112    }
113  
114 +  void EAM::setCutoffRadius( RealType rCut ) {
115 +    eamRcut_ = rCut;
116 +    haveCutoffRadius_ = true;
117 +  }
118 +
119    void EAM::initialize() {
120  
121      // set up the mixing method:
# Line 285 | Line 193 | namespace OpenMD {
193  
194    void EAM::addType(AtomType* atomType){
195  
196 +    EAMAdapter ea = EAMAdapter(atomType);
197      EAMAtomData eamAtomData;
289 –    
290 –    eamAtomData.rho = getRho(atomType);
291 –    eamAtomData.F = getF(atomType);
292 –    eamAtomData.Z = getZ(atomType);
293 –    eamAtomData.rcut = getRcut(atomType);
198  
199 +    eamAtomData.rho = ea.getRho();
200 +    eamAtomData.F = ea.getF();
201 +    eamAtomData.Z = ea.getZ();
202 +    eamAtomData.rcut = ea.getRcut();
203 +
204      // add it to the map:
296 –    AtomTypeProperties atp = atomType->getATP();    
205  
206      pair<map<int,AtomType*>::iterator,bool> ret;    
207 <    ret = EAMlist.insert( pair<int, AtomType*>(atp.ident, atomType) );
207 >    ret = EAMlist.insert( pair<int, AtomType*>(atomType->getIdent(), atomType) );
208      if (ret.second == false) {
209        sprintf( painCave.errMsg,
210                 "EAM already had a previous entry with ident %d\n",
211 <               atp.ident);
211 >               atomType->getIdent());
212        painCave.severity = OPENMD_INFO;
213        painCave.isFatal = 0;
214        simError();        
# Line 360 | Line 268 | namespace OpenMD {
268      return;
269    }
270  
271 <  void EAM::calcDensity(AtomType* at1, AtomType* at2, const RealType rij,
364 <                        RealType &rho_i_at_j, RealType &rho_j_at_i) {
271 >  void EAM::calcDensity(InteractionData &idat) {
272      
273      if (!initialized_) initialize();
274      
275 <    EAMAtomData data1 = EAMMap[at1];
276 <    EAMAtomData data2 = EAMMap[at2];
277 <
278 <    if (rij < data1.rcut) rho_i_at_j = data1.rho->getValueAt(rij);
279 <    if (rij < data2.rcut) rho_j_at_i = data2.rho->getValueAt(rij);
280 <    return;
275 >    EAMAtomData data1 = EAMMap[idat.atypes.first];
276 >    EAMAtomData data2 = EAMMap[idat.atypes.second];
277 >    
278 >    if (haveCutoffRadius_)
279 >      if ( *(idat.rij) > eamRcut_) return;
280 >    
281 >    if ( *(idat.rij) < data1.rcut)
282 >      *(idat.rho1) += data1.rho->getValueAt( *(idat.rij));
283 >    
284 >      
285 >    if ( *(idat.rij) < data2.rcut)
286 >      *(idat.rho2) += data2.rho->getValueAt( *(idat.rij));
287 >    
288 >    return;  
289    }
290 <
291 <  void EAM::calcFunctional(AtomType* at1, RealType rho, RealType &frho,
292 <                           RealType &dfrhodrho) {
378 <
290 >  
291 >  void EAM::calcFunctional(SelfData &sdat) {
292 >    
293      if (!initialized_) initialize();
294  
295 <    EAMAtomData data1 = EAMMap[at1];
295 >    EAMAtomData data1 = EAMMap[ sdat.atype ];
296          
297 <    pair<RealType, RealType> result = data1.F->getValueAndDerivativeAt(rho);
297 >    pair<RealType, RealType> result = data1.F->getValueAndDerivativeAt( *(sdat.rho) );
298  
299 <    frho = result.first;
300 <    dfrhodrho = result.second;
299 >    *(sdat.frho) = result.first;
300 >    *(sdat.dfrhodrho) = result.second;
301 >
302 >    (*(sdat.pot))[METALLIC_FAMILY] += result.first;
303 >    *(sdat.particlePot) += result.first;
304 >
305      return;
306    }
307  
308  
309 <  void EAM::calcForce(AtomType* at1, AtomType* at2, Vector3d d,
392 <                      RealType rij, RealType r2, RealType sw,
393 <                      RealType &vpair, RealType &pot, Vector3d &f1,
394 <                      RealType rho_i, RealType rho_j,
395 <                      RealType dfrhodrho_i, RealType dfrhodrho_j,
396 <                      RealType &fshift_i, RealType &fshift_j) {
309 >  void EAM::calcForce(InteractionData &idat) {
310  
311      if (!initialized_) initialize();
312  
313 +    if (haveCutoffRadius_)
314 +      if ( *(idat.rij) > eamRcut_) return;
315 +  
316      pair<RealType, RealType> res;
317      
318 <    if (rij < eamRcut_) {
319 <
320 <      EAMAtomData data1 = EAMMap[at1];
321 <      EAMAtomData data2 = EAMMap[at2];
322 <
323 <      // get type-specific cutoff radii
324 <
325 <      RealType rci = data1.rcut;
326 <      RealType rcj = data2.rcut;
318 >    EAMAtomData data1 = EAMMap[idat.atypes.first];
319 >    EAMAtomData data2 = EAMMap[idat.atypes.second];
320 >    
321 >    // get type-specific cutoff radii
322 >    
323 >    RealType rci = data1.rcut;
324 >    RealType rcj = data2.rcut;
325 >    
326 >    RealType rha(0.0), drha(0.0), rhb(0.0), drhb(0.0);
327 >    RealType pha(0.0), dpha(0.0), phb(0.0), dphb(0.0);
328 >    RealType phab(0.0), dvpdr(0.0);
329 >    RealType drhoidr, drhojdr, dudr;
330 >    
331 >    if ( *(idat.rij) < rci) {
332 >      res = data1.rho->getValueAndDerivativeAt( *(idat.rij));
333 >      rha = res.first;
334 >      drha = res.second;
335        
336 <      RealType rha, drha, rhb, drhb;
337 <      RealType pha, dpha, phb, dphb;
338 <      RealType phab, dvpdr;
339 <      RealType drhoidr, drhojdr, dudr;
336 >      res = MixingMap[make_pair(idat.atypes.first, idat.atypes.first)].phi->getValueAndDerivativeAt( *(idat.rij) );
337 >      pha = res.first;
338 >      dpha = res.second;
339 >    }
340 >    
341 >    if ( *(idat.rij) < rcj) {
342 >      res = data2.rho->getValueAndDerivativeAt( *(idat.rij) );
343 >      rhb = res.first;
344 >      drhb = res.second;
345        
346 <      if (rij < rci) {
347 <        res = data1.rho->getValueAndDerivativeAt(rij);
348 <        rha = res.first;
349 <        drha = res.second;
421 <
422 <        res = MixingMap[make_pair(at1, at1)].phi->getValueAndDerivativeAt(rij);
423 <        pha = res.first;
424 <        dpha = res.second;
425 <      }
346 >      res = MixingMap[make_pair(idat.atypes.second, idat.atypes.second)].phi->getValueAndDerivativeAt( *(idat.rij) );
347 >      phb = res.first;
348 >      dphb = res.second;
349 >    }
350  
351 <      if (rij < rcj) {
352 <        res = data2.rho->getValueAndDerivativeAt(rij);
353 <        rhb = res.first;
354 <        drhb = res.second;
355 <
356 <        res = MixingMap[make_pair(at2, at2)].phi->getValueAndDerivativeAt(rij);
357 <        phb = res.first;
434 <        dphb = res.second;
351 >    switch(mixMeth_) {
352 >    case eamJohnson:
353 >      
354 >      if ( *(idat.rij) < rci) {
355 >        phab = phab + 0.5 * (rhb / rha) * pha;
356 >        dvpdr = dvpdr + 0.5*((rhb/rha)*dpha +
357 >                             pha*((drhb/rha) - (rhb*drha/rha/rha)));
358        }
359 <
360 <      phab = 0.0;
361 <      dvpdr = 0.0;
362 <
363 <      switch(mixMeth_) {
364 <      case eamJohnson:
365 <      
443 <        if (rij < rci) {
444 <          phab = phab + 0.5 * (rhb / rha) * pha;
445 <          dvpdr = dvpdr + 0.5*((rhb/rha)*dpha +
446 <                               pha*((drhb/rha) - (rhb*drha/rha/rha)));
447 <        }
448 <
449 <        if (rij < rcj) {
450 <          phab = phab + 0.5 * (rha / rhb) * phb;
451 <          dvpdr = dvpdr + 0.5 * ((rha/rhb)*dphb +
452 <                                 phb*((drha/rhb) - (rha*drhb/rhb/rhb)));
453 <        }
454 <
455 <        break;
456 <
457 <      case eamDaw:
458 <        res = MixingMap[make_pair(at1,at2)].phi->getValueAndDerivativeAt(rij);
459 <        phab = res.first;
460 <        dvpdr = res.second;
461 <
462 <        break;
463 <      case eamUnknown:
464 <      default:
465 <
466 <        sprintf(painCave.errMsg,
467 <                "EAM::calcForce hit a mixing method it doesn't know about!\n"
468 <                );
469 <        painCave.severity = OPENMD_ERROR;
470 <        painCave.isFatal = 1;
471 <        simError();        
472 <          
359 >      
360 >      
361 >      
362 >      if ( *(idat.rij) < rcj) {
363 >        phab = phab + 0.5 * (rha / rhb) * phb;
364 >        dvpdr = dvpdr + 0.5 * ((rha/rhb)*dphb +
365 >                               phb*((drha/rhb) - (rha*drhb/rhb/rhb)));
366        }
367        
368 <      drhoidr = drha;
369 <      drhojdr = drhb;
370 <
371 <      dudr = drhojdr*dfrhodrho_i + drhoidr*dfrhodrho_j + dvpdr;
372 <
373 <      f1 = d * dudr / rij;
374 <        
375 <      // particle_pot is the difference between the full potential
376 <      // and the full potential without the presence of a particular
377 <      // particle (atom1).
378 <      //
379 <      // This reduces the density at other particle locations, so
380 <      // we need to recompute the density at atom2 assuming atom1
381 <      // didn't contribute.  This then requires recomputing the
382 <      // density functional for atom2 as well.
383 <      //
384 <      // Most of the particle_pot heavy lifting comes from the
385 <      // pair interaction, and will be handled by vpair.
493 <    
494 <      fshift_i = data1.F->getValueAt( rho_i - rhb );
495 <      fshift_j = data1.F->getValueAt( rho_j - rha );
496 <
497 <      pot += phab;
498 <
499 <      vpair += phab;
368 >      break;
369 >      
370 >    case eamDaw:
371 >      res = MixingMap[idat.atypes].phi->getValueAndDerivativeAt( *(idat.rij));
372 >      phab = res.first;
373 >      dvpdr = res.second;
374 >      
375 >      break;
376 >    case eamUnknown:
377 >    default:
378 >      
379 >      sprintf(painCave.errMsg,
380 >              "EAM::calcForce hit a mixing method it doesn't know about!\n"
381 >              );
382 >      painCave.severity = OPENMD_ERROR;
383 >      painCave.isFatal = 1;
384 >      simError();        
385 >      
386      }
501 –
502 –    return;
387      
388 <  }
389 <
506 <
507 <  void EAM::calc_eam_prepair_rho(int *atid1, int *atid2, RealType *rij,
508 <                                 RealType* rho_i_at_j, RealType* rho_j_at_i){
509 <
510 <    if (!initialized_) initialize();
388 >    drhoidr = drha;
389 >    drhojdr = drhb;
390      
391 <    AtomType* atype1 = EAMlist[*atid1];
513 <    AtomType* atype2 = EAMlist[*atid2];
391 >    dudr = drhojdr* *(idat.dfrho1) + drhoidr* *(idat.dfrho2) + dvpdr;
392      
393 <    calcDensity(atype1, atype2, *rij, *rho_i_at_j, *rho_j_at_i);
394 <
395 <    return;    
396 <  }
397 <
398 <  void EAM::calc_eam_preforce_Frho(int *atid1, RealType *rho, RealType *frho,
399 <                                   RealType *dfrhodrho) {
400 <
401 <    if (!initialized_) initialize();
402 <
525 <    AtomType* atype1 = EAMlist[*atid1];  
526 <
527 <    calcFunctional(atype1, *rho, *frho, *dfrhodrho);
393 >    *(idat.f1) += *(idat.d) * dudr / *(idat.rij);
394 >        
395 >    // particlePot is the difference between the full potential and
396 >    // the full potential without the presence of a particular
397 >    // particle (atom1).
398 >    //
399 >    // This reduces the density at other particle locations, so we
400 >    // need to recompute the density at atom2 assuming atom1 didn't
401 >    // contribute.  This then requires recomputing the density
402 >    // functional for atom2 as well.
403      
404 <    return;    
405 <  }
531 <  RealType EAM::getEAMcut(int *atid1) {
532 <
533 <    if (!initialized_) initialize();
404 >    *(idat.particlePot1) += data2.F->getValueAt( *(idat.rho2) - rha )
405 >      - *(idat.frho2);
406      
407 <    AtomType* atype1 = EAMlist[*atid1];  
408 <      
537 <    return getRcut(atype1);
538 <  }
539 <
540 <  void EAM::do_eam_pair(int *atid1, int *atid2, RealType *d, RealType *rij,
541 <                        RealType *r2, RealType *sw, RealType *vpair,
542 <                        RealType *pot, RealType *f1, RealType *rho1,
543 <                        RealType *rho2, RealType *dfrho1, RealType *dfrho2,
544 <                        RealType *fshift1, RealType *fshift2) {
545 <
546 <    if (!initialized_) initialize();
407 >    *(idat.particlePot2) += data1.F->getValueAt( *(idat.rho1) - rhb)
408 >      - *(idat.frho1);
409      
410 <    AtomType* atype1 = EAMlist[*atid1];
549 <    AtomType* atype2 = EAMlist[*atid2];
410 >    (*(idat.pot))[METALLIC_FAMILY] += phab;
411      
412 <    Vector3d disp(d[0], d[1], d[2]);
413 <    Vector3d frc(f1[0], f1[1], f1[2]);
412 >    *(idat.vpair) += phab;
413 >  
414 >    return;
415      
554 –    calcForce(atype1, atype2, disp, *rij, *r2, *sw, *vpair,  *pot, frc,
555 –              *rho1, *rho2, *dfrho1, *dfrho2, *fshift1, *fshift2);
556 –      
557 –    f1[0] = frc.x();
558 –    f1[1] = frc.y();
559 –    f1[2] = frc.z();
560 –
561 –    return;    
416    }
563 –  
564 –  void EAM::setCutoffEAM(RealType *thisRcut) {
565 –    eamRcut_ = *thisRcut;
566 –  }
567 – }
417  
418 < extern "C" {
419 <  
571 < #define fortranCalcDensity FC_FUNC(calc_eam_prepair_rho, CALC_EAM_PREPAIR_RHO)
572 < #define fortranCalcFunctional FC_FUNC(calc_eam_preforce_frho, CALC_EAM_PREFORCE_FRHO)
573 < #define fortranCalcForce FC_FUNC(do_eam_pair, DO_EAM_PAIR)
574 < #define fortranSetCutoffEAM FC_FUNC(setcutoffeam, SETCUTOFFEAM)
575 < #define fortranGetEAMcut FC_FUNC(geteamcut, GETEAMCUT)
418 >  RealType EAM::getSuggestedCutoffRadius(pair<AtomType*, AtomType*> atypes) {
419 >    if (!initialized_) initialize();  
420  
421 <  
578 <  void fortranCalcDensity(int *atid1, int *atid2, RealType *rij,
579 <                          RealType *rho_i_at_j, RealType *rho_j_at_i) {
580 <    
581 <    return OpenMD::EAM::Instance()->calc_eam_prepair_rho(atid1, atid2, rij,
582 <                                                         rho_i_at_j,  
583 <                                                         rho_j_at_i);
584 <  }
585 <  void fortranCalcFunctional(int *atid1, RealType *rho, RealType *frho,
586 <                             RealType *dfrhodrho) {  
587 <    
588 <    return OpenMD::EAM::Instance()->calc_eam_preforce_Frho(atid1, rho, frho,
589 <                                                           dfrhodrho);
590 <    
591 <  }
592 <  void fortranSetCutoffEAM(RealType *rcut) {
593 <    return OpenMD::EAM::Instance()->setCutoffEAM(rcut);
594 <  }
595 <  void fortranCalcForce(int *atid1, int *atid2, RealType *d, RealType *rij,
596 <                        RealType *r2, RealType *sw, RealType *vpair,
597 <                        RealType *pot, RealType *f1, RealType *rho1,
598 <                        RealType *rho2, RealType *dfrho1, RealType *dfrho2,
599 <                        RealType *fshift1, RealType *fshift2){
600 <    
601 <    return OpenMD::EAM::Instance()->do_eam_pair(atid1, atid2, d, rij,
602 <                                                r2, sw, vpair,
603 <                                                pot, f1, rho1,
604 <                                                rho2, dfrho1, dfrho2,
605 <                                                fshift1,  fshift2);
606 <  }
607 <  RealType fortranGetEAMcut(int* atid) {
608 <    return OpenMD::EAM::Instance()->getEAMcut(atid);
609 <  }
421 >    RealType cut = 0.0;
422  
423 +    map<AtomType*, EAMAtomData>::iterator it;
424 +
425 +    it = EAMMap.find(atypes.first);
426 +    if (it != EAMMap.end()) {
427 +      EAMAtomData data1 = (*it).second;
428 +      cut = data1.rcut;
429 +    }
430 +
431 +    it = EAMMap.find(atypes.second);
432 +    if (it != EAMMap.end()) {
433 +      EAMAtomData data2 = (*it).second;
434 +      if (data2.rcut > cut)
435 +        cut = data2.rcut;
436 +    }
437 +
438 +    return cut;
439 +  }
440   }
441 +

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