| 34 |
|
* work. Good starting points are: |
| 35 |
|
* |
| 36 |
|
* [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005). |
| 37 |
< |
* [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006). |
| 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> |
| 47 |
|
#include "nonbonded/Electrostatic.hpp" |
| 48 |
|
#include "utils/simError.h" |
| 49 |
|
#include "types/NonBondedInteractionType.hpp" |
| 50 |
< |
#include "types/DirectionalAtomType.hpp" |
| 50 |
> |
#include "types/FixedChargeAdapter.hpp" |
| 51 |
> |
#include "types/MultipoleAdapter.hpp" |
| 52 |
|
#include "io/Globals.hpp" |
| 53 |
+ |
#include "nonbonded/SlaterIntegrals.hpp" |
| 54 |
+ |
#include "utils/PhysicalConstants.hpp" |
| 55 |
|
|
| 56 |
+ |
|
| 57 |
|
namespace OpenMD { |
| 58 |
|
|
| 59 |
|
Electrostatic::Electrostatic(): name_("Electrostatic"), initialized_(false), |
| 60 |
< |
forceField_(NULL), info_(NULL), haveCutoffRadius_(false), |
| 61 |
< |
haveDampingAlpha_(false), haveDielectric_(false), |
| 60 |
> |
forceField_(NULL), info_(NULL), |
| 61 |
> |
haveCutoffRadius_(false), |
| 62 |
> |
haveDampingAlpha_(false), |
| 63 |
> |
haveDielectric_(false), |
| 64 |
|
haveElectroSpline_(false) |
| 65 |
< |
{} |
| 65 |
> |
{} |
| 66 |
|
|
| 67 |
|
void Electrostatic::initialize() { |
| 68 |
< |
|
| 68 |
> |
|
| 69 |
|
Globals* simParams_ = info_->getSimParams(); |
| 70 |
|
|
| 71 |
|
summationMap_["HARD"] = esm_HARD; |
| 72 |
+ |
summationMap_["NONE"] = esm_HARD; |
| 73 |
|
summationMap_["SWITCHING_FUNCTION"] = esm_SWITCHING_FUNCTION; |
| 74 |
|
summationMap_["SHIFTED_POTENTIAL"] = esm_SHIFTED_POTENTIAL; |
| 75 |
|
summationMap_["SHIFTED_FORCE"] = esm_SHIFTED_FORCE; |
| 122 |
|
sprintf( painCave.errMsg, |
| 123 |
|
"Electrostatic::initialize: Unknown electrostaticSummationMethod.\n" |
| 124 |
|
"\t(Input file specified %s .)\n" |
| 125 |
< |
"\telectrostaticSummationMethod must be one of: \"none\",\n" |
| 125 |
> |
"\telectrostaticSummationMethod must be one of: \"hard\",\n" |
| 126 |
|
"\t\"shifted_potential\", \"shifted_force\", or \n" |
| 127 |
|
"\t\"reaction_field\".\n", myMethod.c_str() ); |
| 128 |
|
painCave.isFatal = 1; |
| 255 |
|
preRF2_ = 2.0 * preRF_; |
| 256 |
|
} |
| 257 |
|
|
| 258 |
< |
RealType dx = cutoffRadius_ / RealType(np_ - 1); |
| 258 |
> |
// Add a 2 angstrom safety window to deal with cutoffGroups that |
| 259 |
> |
// have charged atoms longer than the cutoffRadius away from each |
| 260 |
> |
// other. Splining may not be the best choice here. Direct calls |
| 261 |
> |
// to erfc might be preferrable. |
| 262 |
> |
|
| 263 |
> |
RealType dx = (cutoffRadius_ + 2.0) / RealType(np_ - 1); |
| 264 |
|
RealType rval; |
| 265 |
|
vector<RealType> rvals; |
| 266 |
|
vector<RealType> yvals; |
| 284 |
|
electrostaticAtomData.is_SplitDipole = false; |
| 285 |
|
electrostaticAtomData.is_Quadrupole = false; |
| 286 |
|
|
| 287 |
< |
if (atomType->isCharge()) { |
| 275 |
< |
GenericData* data = atomType->getPropertyByName("Charge"); |
| 287 |
> |
FixedChargeAdapter fca = FixedChargeAdapter(atomType); |
| 288 |
|
|
| 289 |
< |
if (data == NULL) { |
| 278 |
< |
sprintf( painCave.errMsg, "Electrostatic::addType could not find " |
| 279 |
< |
"Charge\n" |
| 280 |
< |
"\tparameters for atomType %s.\n", |
| 281 |
< |
atomType->getName().c_str()); |
| 282 |
< |
painCave.severity = OPENMD_ERROR; |
| 283 |
< |
painCave.isFatal = 1; |
| 284 |
< |
simError(); |
| 285 |
< |
} |
| 286 |
< |
|
| 287 |
< |
DoubleGenericData* doubleData = dynamic_cast<DoubleGenericData*>(data); |
| 288 |
< |
if (doubleData == NULL) { |
| 289 |
< |
sprintf( painCave.errMsg, |
| 290 |
< |
"Electrostatic::addType could not convert GenericData to " |
| 291 |
< |
"Charge for\n" |
| 292 |
< |
"\tatom type %s\n", atomType->getName().c_str()); |
| 293 |
< |
painCave.severity = OPENMD_ERROR; |
| 294 |
< |
painCave.isFatal = 1; |
| 295 |
< |
simError(); |
| 296 |
< |
} |
| 289 |
> |
if (fca.isFixedCharge()) { |
| 290 |
|
electrostaticAtomData.is_Charge = true; |
| 291 |
< |
electrostaticAtomData.charge = doubleData->getData(); |
| 291 |
> |
electrostaticAtomData.charge = fca.getCharge(); |
| 292 |
|
} |
| 293 |
|
|
| 294 |
< |
if (atomType->isDirectional()) { |
| 295 |
< |
DirectionalAtomType* daType = dynamic_cast<DirectionalAtomType*>(atomType); |
| 296 |
< |
|
| 304 |
< |
if (daType->isDipole()) { |
| 305 |
< |
GenericData* data = daType->getPropertyByName("Dipole"); |
| 306 |
< |
|
| 307 |
< |
if (data == NULL) { |
| 308 |
< |
sprintf( painCave.errMsg, |
| 309 |
< |
"Electrostatic::addType could not find Dipole\n" |
| 310 |
< |
"\tparameters for atomType %s.\n", |
| 311 |
< |
daType->getName().c_str()); |
| 312 |
< |
painCave.severity = OPENMD_ERROR; |
| 313 |
< |
painCave.isFatal = 1; |
| 314 |
< |
simError(); |
| 315 |
< |
} |
| 316 |
< |
|
| 317 |
< |
DoubleGenericData* doubleData = dynamic_cast<DoubleGenericData*>(data); |
| 318 |
< |
if (doubleData == NULL) { |
| 319 |
< |
sprintf( painCave.errMsg, |
| 320 |
< |
"Electrostatic::addType could not convert GenericData to " |
| 321 |
< |
"Dipole Moment\n" |
| 322 |
< |
"\tfor atom type %s\n", daType->getName().c_str()); |
| 323 |
< |
painCave.severity = OPENMD_ERROR; |
| 324 |
< |
painCave.isFatal = 1; |
| 325 |
< |
simError(); |
| 326 |
< |
} |
| 294 |
> |
MultipoleAdapter ma = MultipoleAdapter(atomType); |
| 295 |
> |
if (ma.isMultipole()) { |
| 296 |
> |
if (ma.isDipole()) { |
| 297 |
|
electrostaticAtomData.is_Dipole = true; |
| 298 |
< |
electrostaticAtomData.dipole_moment = doubleData->getData(); |
| 298 |
> |
electrostaticAtomData.dipole_moment = ma.getDipoleMoment(); |
| 299 |
|
} |
| 300 |
< |
|
| 331 |
< |
if (daType->isSplitDipole()) { |
| 332 |
< |
GenericData* data = daType->getPropertyByName("SplitDipoleDistance"); |
| 333 |
< |
|
| 334 |
< |
if (data == NULL) { |
| 335 |
< |
sprintf(painCave.errMsg, |
| 336 |
< |
"Electrostatic::addType could not find SplitDipoleDistance\n" |
| 337 |
< |
"\tparameter for atomType %s.\n", |
| 338 |
< |
daType->getName().c_str()); |
| 339 |
< |
painCave.severity = OPENMD_ERROR; |
| 340 |
< |
painCave.isFatal = 1; |
| 341 |
< |
simError(); |
| 342 |
< |
} |
| 343 |
< |
|
| 344 |
< |
DoubleGenericData* doubleData = dynamic_cast<DoubleGenericData*>(data); |
| 345 |
< |
if (doubleData == NULL) { |
| 346 |
< |
sprintf( painCave.errMsg, |
| 347 |
< |
"Electrostatic::addType could not convert GenericData to " |
| 348 |
< |
"SplitDipoleDistance for\n" |
| 349 |
< |
"\tatom type %s\n", daType->getName().c_str()); |
| 350 |
< |
painCave.severity = OPENMD_ERROR; |
| 351 |
< |
painCave.isFatal = 1; |
| 352 |
< |
simError(); |
| 353 |
< |
} |
| 300 |
> |
if (ma.isSplitDipole()) { |
| 301 |
|
electrostaticAtomData.is_SplitDipole = true; |
| 302 |
< |
electrostaticAtomData.split_dipole_distance = doubleData->getData(); |
| 302 |
> |
electrostaticAtomData.split_dipole_distance = ma.getSplitDipoleDistance(); |
| 303 |
|
} |
| 304 |
< |
|
| 358 |
< |
if (daType->isQuadrupole()) { |
| 359 |
< |
GenericData* data = daType->getPropertyByName("QuadrupoleMoments"); |
| 360 |
< |
|
| 361 |
< |
if (data == NULL) { |
| 362 |
< |
sprintf( painCave.errMsg, |
| 363 |
< |
"Electrostatic::addType could not find QuadrupoleMoments\n" |
| 364 |
< |
"\tparameter for atomType %s.\n", |
| 365 |
< |
daType->getName().c_str()); |
| 366 |
< |
painCave.severity = OPENMD_ERROR; |
| 367 |
< |
painCave.isFatal = 1; |
| 368 |
< |
simError(); |
| 369 |
< |
} |
| 370 |
< |
|
| 304 |
> |
if (ma.isQuadrupole()) { |
| 305 |
|
// Quadrupoles in OpenMD are set as the diagonal elements |
| 306 |
|
// of the diagonalized traceless quadrupole moment tensor. |
| 307 |
|
// The column vectors of the unitary matrix that diagonalizes |
| 308 |
|
// the quadrupole moment tensor become the eFrame (or the |
| 309 |
|
// electrostatic version of the body-fixed frame. |
| 310 |
< |
|
| 311 |
< |
Vector3dGenericData* v3dData = dynamic_cast<Vector3dGenericData*>(data); |
| 378 |
< |
if (v3dData == NULL) { |
| 379 |
< |
sprintf( painCave.errMsg, |
| 380 |
< |
"Electrostatic::addType could not convert GenericData to " |
| 381 |
< |
"Quadrupole Moments for\n" |
| 382 |
< |
"\tatom type %s\n", daType->getName().c_str()); |
| 383 |
< |
painCave.severity = OPENMD_ERROR; |
| 384 |
< |
painCave.isFatal = 1; |
| 385 |
< |
simError(); |
| 386 |
< |
} |
| 387 |
< |
electrostaticAtomData.is_Quadrupole = true; |
| 388 |
< |
electrostaticAtomData.quadrupole_moments = v3dData->getData(); |
| 310 |
> |
electrostaticAtomData.is_Quadrupole = true; |
| 311 |
> |
electrostaticAtomData.quadrupole_moments = ma.getQuadrupoleMoments(); |
| 312 |
|
} |
| 313 |
|
} |
| 314 |
|
|
| 315 |
< |
AtomTypeProperties atp = atomType->getATP(); |
| 315 |
> |
FluctuatingChargeAdapter fqa = FluctuatingChargeAdapter(atomType); |
| 316 |
|
|
| 317 |
+ |
if (fqa.isFluctuatingCharge()) { |
| 318 |
+ |
electrostaticAtomData.is_FluctuatingCharge = true; |
| 319 |
+ |
electrostaticAtomData.electronegativity = fca.getElectronegativity(); |
| 320 |
+ |
electrostaticAtomData.hardness = fca.getHardness(); |
| 321 |
+ |
electrostaticAtomData.slaterN = fca.getSlaterN(); |
| 322 |
+ |
electrostaticAtomData.slaterZeta = fca.getSlaterZeta(); |
| 323 |
+ |
} |
| 324 |
+ |
|
| 325 |
|
pair<map<int,AtomType*>::iterator,bool> ret; |
| 326 |
< |
ret = ElectrostaticList.insert( pair<int,AtomType*>(atp.ident, atomType) ); |
| 326 |
> |
ret = ElectrostaticList.insert( pair<int,AtomType*>(atomType->getIdent(), |
| 327 |
> |
atomType) ); |
| 328 |
|
if (ret.second == false) { |
| 329 |
|
sprintf( painCave.errMsg, |
| 330 |
|
"Electrostatic already had a previous entry with ident %d\n", |
| 331 |
< |
atp.ident); |
| 331 |
> |
atomType->getIdent() ); |
| 332 |
|
painCave.severity = OPENMD_INFO; |
| 333 |
|
painCave.isFatal = 0; |
| 334 |
|
simError(); |
| 335 |
|
} |
| 336 |
|
|
| 337 |
< |
ElectrostaticMap[atomType] = electrostaticAtomData; |
| 337 |
> |
ElectrostaticMap[atomType] = electrostaticAtomData; |
| 338 |
> |
|
| 339 |
> |
// Now, iterate over all known types and add to the mixing map: |
| 340 |
> |
|
| 341 |
> |
map<AtomType*, ElectrostaticAtomData>::iterator it; |
| 342 |
> |
for( it = ElectrostaticMap.begin(); it != ElectrostaticMap.end(); ++it) { |
| 343 |
> |
AtomType* atype2 = (*it).first; |
| 344 |
> |
|
| 345 |
> |
if ((*it).is_FluctuatingCharge && electrostaticAtomData.is_FluctuatingCharge) { |
| 346 |
> |
|
| 347 |
> |
RealType a = electrostaticAtomData.slaterZeta; |
| 348 |
> |
RealType b = (*it).slaterZeta; |
| 349 |
> |
int m = electrostaticAtomData.slaterN; |
| 350 |
> |
int n = (*it).slaterN; |
| 351 |
> |
|
| 352 |
> |
// Create the spline of the coulombic integral for s-type |
| 353 |
> |
// Slater orbitals. Add a 2 angstrom safety window to deal |
| 354 |
> |
// with cutoffGroups that have charged atoms longer than the |
| 355 |
> |
// cutoffRadius away from each other. |
| 356 |
> |
|
| 357 |
> |
RealType dr = (cutoffRadius_ + 2.0) / RealType(np_ - 1); |
| 358 |
> |
vector<RealType> rvals; |
| 359 |
> |
vector<RealType> J1vals; |
| 360 |
> |
vector<RealType> J2vals; |
| 361 |
> |
for (int i = 0; i < np_; i++) { |
| 362 |
> |
rval = RealType(i) * dr; |
| 363 |
> |
rvals.push_back(rval); |
| 364 |
> |
J1vals.push_back( sSTOCoulInt( a, b, m, n, rval * PhysicalConstants::angstromsToBohr ) ); |
| 365 |
> |
J2vals.push_back( sSTOCoulInt( b, a, n, m, rval * PhysicalConstants::angstromsToBohr ) ); |
| 366 |
> |
} |
| 367 |
> |
|
| 368 |
> |
CubicSpline J1 = new CubicSpline(); |
| 369 |
> |
J1->addPoints(rvals, J1vals); |
| 370 |
> |
CubicSpline J2 = new CubicSpline(); |
| 371 |
> |
J2->addPoints(rvals, J2vals); |
| 372 |
> |
|
| 373 |
> |
pair<AtomType*, AtomType*> key1, key2; |
| 374 |
> |
key1 = make_pair(atomType, atype2); |
| 375 |
> |
key2 = make_pair(atype2, atomType); |
| 376 |
> |
|
| 377 |
> |
Jij[key1] = J1; |
| 378 |
> |
Jij[key2] = J2; |
| 379 |
> |
} |
| 380 |
> |
} |
| 381 |
> |
|
| 382 |
|
return; |
| 383 |
|
} |
| 384 |
|
|
| 420 |
|
RealType ct_i, ct_j, ct_ij, a1; |
| 421 |
|
RealType riji, ri, ri2, ri3, ri4; |
| 422 |
|
RealType pref, vterm, epot, dudr; |
| 423 |
+ |
RealType vpair(0.0); |
| 424 |
|
RealType scale, sc2; |
| 425 |
|
RealType pot_term, preVal, rfVal; |
| 426 |
|
RealType c2ri, c3ri, c4rij, cti3, ctj3, ctidotj; |
| 427 |
|
RealType preSw, preSwSc; |
| 428 |
|
RealType c1, c2, c3, c4; |
| 429 |
< |
RealType erfcVal, derfcVal; |
| 429 |
> |
RealType erfcVal(1.0), derfcVal(0.0); |
| 430 |
|
RealType BigR; |
| 431 |
+ |
RealType two(2.0), three(3.0); |
| 432 |
|
|
| 433 |
|
Vector3d Q_i, Q_j; |
| 434 |
|
Vector3d ux_i, uy_i, uz_i; |
| 438 |
|
Vector3d rhatdot2, rhatc4; |
| 439 |
|
Vector3d dVdr; |
| 440 |
|
|
| 441 |
+ |
// variables for indirect (reaction field) interactions for excluded pairs: |
| 442 |
+ |
RealType indirect_Pot(0.0); |
| 443 |
+ |
RealType indirect_vpair(0.0); |
| 444 |
+ |
Vector3d indirect_dVdr(V3Zero); |
| 445 |
+ |
Vector3d indirect_duduz_i(V3Zero), indirect_duduz_j(V3Zero); |
| 446 |
+ |
|
| 447 |
|
pair<RealType, RealType> res; |
| 448 |
|
|
| 449 |
|
if (!initialized_) initialize(); |
| 468 |
|
bool j_is_SplitDipole = data2.is_SplitDipole; |
| 469 |
|
bool j_is_Quadrupole = data2.is_Quadrupole; |
| 470 |
|
|
| 471 |
< |
if (i_is_Charge) |
| 471 |
> |
if (i_is_Charge) { |
| 472 |
|
q_i = data1.charge; |
| 473 |
+ |
if (idat.excluded) { |
| 474 |
+ |
*(idat.skippedCharge2) += q_i; |
| 475 |
+ |
} |
| 476 |
+ |
} |
| 477 |
|
|
| 478 |
|
if (i_is_Dipole) { |
| 479 |
|
mu_i = data1.dipole_moment; |
| 506 |
|
duduz_i = V3Zero; |
| 507 |
|
} |
| 508 |
|
|
| 509 |
< |
if (j_is_Charge) |
| 509 |
> |
if (j_is_Charge) { |
| 510 |
|
q_j = data2.charge; |
| 511 |
+ |
if (idat.excluded) { |
| 512 |
+ |
*(idat.skippedCharge1) += q_j; |
| 513 |
+ |
} |
| 514 |
+ |
} |
| 515 |
|
|
| 516 |
+ |
|
| 517 |
|
if (j_is_Dipole) { |
| 518 |
|
mu_j = data2.dipole_moment; |
| 519 |
|
uz_j = idat.eFrame2->getColumn(2); |
| 553 |
|
if (j_is_Charge) { |
| 554 |
|
if (screeningMethod_ == DAMPED) { |
| 555 |
|
// assemble the damping variables |
| 556 |
< |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 557 |
< |
erfcVal = res.first; |
| 558 |
< |
derfcVal = res.second; |
| 556 |
> |
//res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 557 |
> |
//erfcVal = res.first; |
| 558 |
> |
//derfcVal = res.second; |
| 559 |
> |
|
| 560 |
> |
erfcVal = erfc(dampingAlpha_ * *(idat.rij)); |
| 561 |
> |
derfcVal = - alphaPi_ * exp(-alpha2_ * *(idat.r2)); |
| 562 |
> |
|
| 563 |
|
c1 = erfcVal * riji; |
| 564 |
|
c2 = (-derfcVal + c1) * riji; |
| 565 |
|
} else { |
| 578 |
|
dudr = *(idat.sw) * preVal * (c2c_ - c2); |
| 579 |
|
|
| 580 |
|
} else if (summationMethod_ == esm_REACTION_FIELD) { |
| 581 |
< |
rfVal = *(idat.electroMult) * preRF_ * *(idat.rij) * *(idat.rij) ; |
| 581 |
> |
rfVal = preRF_ * *(idat.rij) * *(idat.rij); |
| 582 |
> |
|
| 583 |
|
vterm = preVal * ( riji + rfVal ); |
| 584 |
|
dudr = *(idat.sw) * preVal * ( 2.0 * rfVal - riji ) * riji; |
| 585 |
+ |
|
| 586 |
+ |
// if this is an excluded pair, there are still indirect |
| 587 |
+ |
// interactions via the reaction field we must worry about: |
| 588 |
|
|
| 589 |
+ |
if (idat.excluded) { |
| 590 |
+ |
indirect_vpair += preVal * rfVal; |
| 591 |
+ |
indirect_Pot += *(idat.sw) * preVal * rfVal; |
| 592 |
+ |
indirect_dVdr += *(idat.sw) * preVal * two * rfVal * riji * rhat; |
| 593 |
+ |
} |
| 594 |
+ |
|
| 595 |
|
} else { |
| 589 |
– |
vterm = preVal * riji * erfcVal; |
| 596 |
|
|
| 597 |
+ |
vterm = preVal * riji * erfcVal; |
| 598 |
|
dudr = - *(idat.sw) * preVal * c2; |
| 599 |
|
|
| 600 |
|
} |
| 594 |
– |
|
| 595 |
– |
*(idat.vpair) += vterm; |
| 596 |
– |
epot += *(idat.sw) * vterm; |
| 601 |
|
|
| 602 |
< |
dVdr += dudr * rhat; |
| 602 |
> |
vpair += vterm; |
| 603 |
> |
epot += *(idat.sw) * vterm; |
| 604 |
> |
dVdr += dudr * rhat; |
| 605 |
|
} |
| 606 |
|
|
| 607 |
|
if (j_is_Dipole) { |
| 614 |
|
ri3 = ri2 * riji; |
| 615 |
|
|
| 616 |
|
vterm = - pref * ct_j * ( ri2 - preRF2_ * *(idat.rij) ); |
| 617 |
< |
*(idat.vpair) += vterm; |
| 617 |
> |
vpair += vterm; |
| 618 |
|
epot += *(idat.sw) * vterm; |
| 619 |
|
|
| 620 |
< |
dVdr += -preSw * (ri3 * (uz_j - 3.0 * ct_j * rhat) - preRF2_*uz_j); |
| 620 |
> |
dVdr += -preSw * (ri3 * (uz_j - three * ct_j * rhat) - preRF2_*uz_j); |
| 621 |
|
duduz_j += -preSw * rhat * (ri2 - preRF2_ * *(idat.rij) ); |
| 622 |
|
|
| 623 |
+ |
// Even if we excluded this pair from direct interactions, |
| 624 |
+ |
// we still have the reaction-field-mediated charge-dipole |
| 625 |
+ |
// interaction: |
| 626 |
+ |
|
| 627 |
+ |
if (idat.excluded) { |
| 628 |
+ |
indirect_vpair += pref * ct_j * preRF2_ * *(idat.rij); |
| 629 |
+ |
indirect_Pot += preSw * ct_j * preRF2_ * *(idat.rij); |
| 630 |
+ |
indirect_dVdr += preSw * preRF2_ * uz_j; |
| 631 |
+ |
indirect_duduz_j += preSw * rhat * preRF2_ * *(idat.rij); |
| 632 |
+ |
} |
| 633 |
+ |
|
| 634 |
|
} else { |
| 635 |
|
// determine the inverse r used if we have split dipoles |
| 636 |
|
if (j_is_SplitDipole) { |
| 646 |
|
|
| 647 |
|
if (screeningMethod_ == DAMPED) { |
| 648 |
|
// assemble the damping variables |
| 649 |
< |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 650 |
< |
erfcVal = res.first; |
| 651 |
< |
derfcVal = res.second; |
| 649 |
> |
//res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 650 |
> |
//erfcVal = res.first; |
| 651 |
> |
//derfcVal = res.second; |
| 652 |
> |
erfcVal = erfc(dampingAlpha_ * *(idat.rij)); |
| 653 |
> |
derfcVal = - alphaPi_ * exp(-alpha2_ * *(idat.r2)); |
| 654 |
|
c1 = erfcVal * ri; |
| 655 |
|
c2 = (-derfcVal + c1) * ri; |
| 656 |
|
c3 = -2.0 * derfcVal * alpha2_ + 3.0 * c2 * ri; |
| 665 |
|
// calculate the potential |
| 666 |
|
pot_term = scale * c2; |
| 667 |
|
vterm = -pref * ct_j * pot_term; |
| 668 |
< |
*(idat.vpair) += vterm; |
| 668 |
> |
vpair += vterm; |
| 669 |
|
epot += *(idat.sw) * vterm; |
| 670 |
|
|
| 671 |
|
// calculate derivatives for forces and torques |
| 685 |
|
|
| 686 |
|
if (screeningMethod_ == DAMPED) { |
| 687 |
|
// assemble the damping variables |
| 688 |
< |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 689 |
< |
erfcVal = res.first; |
| 690 |
< |
derfcVal = res.second; |
| 688 |
> |
//res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 689 |
> |
//erfcVal = res.first; |
| 690 |
> |
//derfcVal = res.second; |
| 691 |
> |
erfcVal = erfc(dampingAlpha_ * *(idat.rij)); |
| 692 |
> |
derfcVal = - alphaPi_ * exp(-alpha2_ * *(idat.r2)); |
| 693 |
|
c1 = erfcVal * riji; |
| 694 |
|
c2 = (-derfcVal + c1) * riji; |
| 695 |
|
c3 = -2.0 * derfcVal * alpha2_ + 3.0 * c2 * riji; |
| 706 |
|
c2ri = c2 * riji; |
| 707 |
|
c3ri = c3 * riji; |
| 708 |
|
c4rij = c4 * *(idat.rij) ; |
| 709 |
< |
rhatdot2 = 2.0 * rhat * c3; |
| 709 |
> |
rhatdot2 = two * rhat * c3; |
| 710 |
|
rhatc4 = rhat * c4rij; |
| 711 |
|
|
| 712 |
|
// calculate the potential |
| 714 |
|
qyy_j * (cy2*c3 - c2ri) + |
| 715 |
|
qzz_j * (cz2*c3 - c2ri) ); |
| 716 |
|
vterm = pref * pot_term; |
| 717 |
< |
*(idat.vpair) += vterm; |
| 717 |
> |
vpair += vterm; |
| 718 |
|
epot += *(idat.sw) * vterm; |
| 719 |
|
|
| 720 |
|
// calculate derivatives for the forces and torques |
| 721 |
|
|
| 722 |
< |
dVdr += -preSw * ( qxx_j* (cx2*rhatc4 - (2.0*cx_j*ux_j + rhat)*c3ri) + |
| 723 |
< |
qyy_j* (cy2*rhatc4 - (2.0*cy_j*uy_j + rhat)*c3ri) + |
| 724 |
< |
qzz_j* (cz2*rhatc4 - (2.0*cz_j*uz_j + rhat)*c3ri)); |
| 722 |
> |
dVdr += -preSw * ( qxx_j* (cx2*rhatc4 - (two*cx_j*ux_j + rhat)*c3ri) + |
| 723 |
> |
qyy_j* (cy2*rhatc4 - (two*cy_j*uy_j + rhat)*c3ri) + |
| 724 |
> |
qzz_j* (cz2*rhatc4 - (two*cz_j*uz_j + rhat)*c3ri)); |
| 725 |
|
|
| 726 |
|
dudux_j += preSw * qxx_j * cx_j * rhatdot2; |
| 727 |
|
duduy_j += preSw * qyy_j * cy_j * rhatdot2; |
| 742 |
|
ri3 = ri2 * riji; |
| 743 |
|
|
| 744 |
|
vterm = pref * ct_i * ( ri2 - preRF2_ * *(idat.rij) ); |
| 745 |
< |
*(idat.vpair) += vterm; |
| 745 |
> |
vpair += vterm; |
| 746 |
|
epot += *(idat.sw) * vterm; |
| 747 |
|
|
| 748 |
< |
dVdr += preSw * (ri3 * (uz_i - 3.0 * ct_i * rhat) - preRF2_ * uz_i); |
| 748 |
> |
dVdr += preSw * (ri3 * (uz_i - three * ct_i * rhat) - preRF2_ * uz_i); |
| 749 |
|
|
| 750 |
|
duduz_i += preSw * rhat * (ri2 - preRF2_ * *(idat.rij) ); |
| 751 |
+ |
|
| 752 |
+ |
// Even if we excluded this pair from direct interactions, |
| 753 |
+ |
// we still have the reaction-field-mediated charge-dipole |
| 754 |
+ |
// interaction: |
| 755 |
+ |
|
| 756 |
+ |
if (idat.excluded) { |
| 757 |
+ |
indirect_vpair += -pref * ct_i * preRF2_ * *(idat.rij); |
| 758 |
+ |
indirect_Pot += -preSw * ct_i * preRF2_ * *(idat.rij); |
| 759 |
+ |
indirect_dVdr += -preSw * preRF2_ * uz_i; |
| 760 |
+ |
indirect_duduz_i += -preSw * rhat * preRF2_ * *(idat.rij); |
| 761 |
+ |
} |
| 762 |
|
|
| 763 |
|
} else { |
| 764 |
|
|
| 776 |
|
|
| 777 |
|
if (screeningMethod_ == DAMPED) { |
| 778 |
|
// assemble the damping variables |
| 779 |
< |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 780 |
< |
erfcVal = res.first; |
| 781 |
< |
derfcVal = res.second; |
| 779 |
> |
//res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 780 |
> |
//erfcVal = res.first; |
| 781 |
> |
//derfcVal = res.second; |
| 782 |
> |
erfcVal = erfc(dampingAlpha_ * *(idat.rij)); |
| 783 |
> |
derfcVal = - alphaPi_ * exp(-alpha2_ * *(idat.r2)); |
| 784 |
|
c1 = erfcVal * ri; |
| 785 |
|
c2 = (-derfcVal + c1) * ri; |
| 786 |
|
c3 = -2.0 * derfcVal * alpha2_ + 3.0 * c2 * ri; |
| 795 |
|
// calculate the potential |
| 796 |
|
pot_term = c2 * scale; |
| 797 |
|
vterm = pref * ct_i * pot_term; |
| 798 |
< |
*(idat.vpair) += vterm; |
| 798 |
> |
vpair += vterm; |
| 799 |
|
epot += *(idat.sw) * vterm; |
| 800 |
|
|
| 801 |
|
// calculate derivatives for the forces and torques |
| 818 |
|
|
| 819 |
|
vterm = pref * ( ri3 * (ct_ij - 3.0 * ct_i * ct_j) - |
| 820 |
|
preRF2_ * ct_ij ); |
| 821 |
< |
*(idat.vpair) += vterm; |
| 821 |
> |
vpair += vterm; |
| 822 |
|
epot += *(idat.sw) * vterm; |
| 823 |
|
|
| 824 |
|
a1 = 5.0 * ct_i * ct_j - ct_ij; |
| 825 |
|
|
| 826 |
< |
dVdr += preSw * 3.0 * ri4 * (a1 * rhat - ct_i * uz_j - ct_j * uz_i); |
| 826 |
> |
dVdr += preSw * three * ri4 * (a1 * rhat - ct_i * uz_j - ct_j * uz_i); |
| 827 |
|
|
| 828 |
< |
duduz_i += preSw * (ri3 * (uz_j - 3.0 * ct_j * rhat) - preRF2_*uz_j); |
| 829 |
< |
duduz_j += preSw * (ri3 * (uz_i - 3.0 * ct_i * rhat) - preRF2_*uz_i); |
| 828 |
> |
duduz_i += preSw * (ri3 * (uz_j - three * ct_j * rhat) - preRF2_*uz_j); |
| 829 |
> |
duduz_j += preSw * (ri3 * (uz_i - three * ct_i * rhat) - preRF2_*uz_i); |
| 830 |
|
|
| 831 |
+ |
if (idat.excluded) { |
| 832 |
+ |
indirect_vpair += - pref * preRF2_ * ct_ij; |
| 833 |
+ |
indirect_Pot += - preSw * preRF2_ * ct_ij; |
| 834 |
+ |
indirect_duduz_i += -preSw * preRF2_ * uz_j; |
| 835 |
+ |
indirect_duduz_j += -preSw * preRF2_ * uz_i; |
| 836 |
+ |
} |
| 837 |
+ |
|
| 838 |
|
} else { |
| 839 |
|
|
| 840 |
|
if (i_is_SplitDipole) { |
| 857 |
|
} |
| 858 |
|
if (screeningMethod_ == DAMPED) { |
| 859 |
|
// assemble damping variables |
| 860 |
< |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 861 |
< |
erfcVal = res.first; |
| 862 |
< |
derfcVal = res.second; |
| 860 |
> |
//res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 861 |
> |
//erfcVal = res.first; |
| 862 |
> |
//derfcVal = res.second; |
| 863 |
> |
erfcVal = erfc(dampingAlpha_ * *(idat.rij)); |
| 864 |
> |
derfcVal = - alphaPi_ * exp(-alpha2_ * *(idat.r2)); |
| 865 |
|
c1 = erfcVal * ri; |
| 866 |
|
c2 = (-derfcVal + c1) * ri; |
| 867 |
|
c3 = -2.0 * derfcVal * alpha2_ + 3.0 * c2 * ri; |
| 886 |
|
// calculate the potential |
| 887 |
|
pot_term = (ct_ij * c2ri - ctidotj * c3); |
| 888 |
|
vterm = pref * pot_term; |
| 889 |
< |
*(idat.vpair) += vterm; |
| 889 |
> |
vpair += vterm; |
| 890 |
|
epot += *(idat.sw) * vterm; |
| 891 |
|
|
| 892 |
|
// calculate derivatives for the forces and torques |
| 910 |
|
|
| 911 |
|
if (screeningMethod_ == DAMPED) { |
| 912 |
|
// assemble the damping variables |
| 913 |
< |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 914 |
< |
erfcVal = res.first; |
| 915 |
< |
derfcVal = res.second; |
| 913 |
> |
//res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 914 |
> |
//erfcVal = res.first; |
| 915 |
> |
//derfcVal = res.second; |
| 916 |
> |
erfcVal = erfc(dampingAlpha_ * *(idat.rij)); |
| 917 |
> |
derfcVal = - alphaPi_ * exp(-alpha2_ * *(idat.r2)); |
| 918 |
|
c1 = erfcVal * riji; |
| 919 |
|
c2 = (-derfcVal + c1) * riji; |
| 920 |
|
c3 = -2.0 * derfcVal * alpha2_ + 3.0 * c2 * riji; |
| 931 |
|
c2ri = c2 * riji; |
| 932 |
|
c3ri = c3 * riji; |
| 933 |
|
c4rij = c4 * *(idat.rij) ; |
| 934 |
< |
rhatdot2 = 2.0 * rhat * c3; |
| 934 |
> |
rhatdot2 = two * rhat * c3; |
| 935 |
|
rhatc4 = rhat * c4rij; |
| 936 |
|
|
| 937 |
|
// calculate the potential |
| 940 |
|
qzz_i * (cz2 * c3 - c2ri) ); |
| 941 |
|
|
| 942 |
|
vterm = pref * pot_term; |
| 943 |
< |
*(idat.vpair) += vterm; |
| 943 |
> |
vpair += vterm; |
| 944 |
|
epot += *(idat.sw) * vterm; |
| 945 |
|
|
| 946 |
|
// calculate the derivatives for the forces and torques |
| 947 |
|
|
| 948 |
< |
dVdr += -preSw * (qxx_i* (cx2*rhatc4 - (2.0*cx_i*ux_i + rhat)*c3ri) + |
| 949 |
< |
qyy_i* (cy2*rhatc4 - (2.0*cy_i*uy_i + rhat)*c3ri) + |
| 950 |
< |
qzz_i* (cz2*rhatc4 - (2.0*cz_i*uz_i + rhat)*c3ri)); |
| 948 |
> |
dVdr += -preSw * (qxx_i* (cx2*rhatc4 - (two*cx_i*ux_i + rhat)*c3ri) + |
| 949 |
> |
qyy_i* (cy2*rhatc4 - (two*cy_i*uy_i + rhat)*c3ri) + |
| 950 |
> |
qzz_i* (cz2*rhatc4 - (two*cz_i*uz_i + rhat)*c3ri)); |
| 951 |
|
|
| 952 |
|
dudux_i += preSw * qxx_i * cx_i * rhatdot2; |
| 953 |
|
duduy_i += preSw * qyy_i * cy_i * rhatdot2; |
| 955 |
|
} |
| 956 |
|
} |
| 957 |
|
|
| 913 |
– |
(*(idat.pot))[ELECTROSTATIC_FAMILY] += epot; |
| 914 |
– |
*(idat.f1) += dVdr; |
| 958 |
|
|
| 959 |
< |
if (i_is_Dipole || i_is_Quadrupole) |
| 960 |
< |
*(idat.t1) -= cross(uz_i, duduz_i); |
| 961 |
< |
if (i_is_Quadrupole) { |
| 962 |
< |
*(idat.t1) -= cross(ux_i, dudux_i); |
| 963 |
< |
*(idat.t1) -= cross(uy_i, duduy_i); |
| 964 |
< |
} |
| 965 |
< |
|
| 966 |
< |
if (j_is_Dipole || j_is_Quadrupole) |
| 967 |
< |
*(idat.t2) -= cross(uz_j, duduz_j); |
| 968 |
< |
if (j_is_Quadrupole) { |
| 969 |
< |
*(idat.t2) -= cross(uz_j, dudux_j); |
| 970 |
< |
*(idat.t2) -= cross(uz_j, duduy_j); |
| 971 |
< |
} |
| 959 |
> |
if (!idat.excluded) { |
| 960 |
> |
*(idat.vpair) += vpair; |
| 961 |
> |
(*(idat.pot))[ELECTROSTATIC_FAMILY] += epot; |
| 962 |
> |
*(idat.f1) += dVdr; |
| 963 |
> |
|
| 964 |
> |
if (i_is_Dipole || i_is_Quadrupole) |
| 965 |
> |
*(idat.t1) -= cross(uz_i, duduz_i); |
| 966 |
> |
if (i_is_Quadrupole) { |
| 967 |
> |
*(idat.t1) -= cross(ux_i, dudux_i); |
| 968 |
> |
*(idat.t1) -= cross(uy_i, duduy_i); |
| 969 |
> |
} |
| 970 |
> |
|
| 971 |
> |
if (j_is_Dipole || j_is_Quadrupole) |
| 972 |
> |
*(idat.t2) -= cross(uz_j, duduz_j); |
| 973 |
> |
if (j_is_Quadrupole) { |
| 974 |
> |
*(idat.t2) -= cross(uz_j, dudux_j); |
| 975 |
> |
*(idat.t2) -= cross(uz_j, duduy_j); |
| 976 |
> |
} |
| 977 |
|
|
| 978 |
< |
return; |
| 931 |
< |
} |
| 978 |
> |
} else { |
| 979 |
|
|
| 980 |
< |
void Electrostatic::calcSkipCorrection(InteractionData &idat) { |
| 980 |
> |
// only accumulate the forces and torques resulting from the |
| 981 |
> |
// indirect reaction field terms. |
| 982 |
|
|
| 983 |
< |
if (!initialized_) initialize(); |
| 984 |
< |
|
| 985 |
< |
ElectrostaticAtomData data1 = ElectrostaticMap[idat.atypes.first]; |
| 938 |
< |
ElectrostaticAtomData data2 = ElectrostaticMap[idat.atypes.second]; |
| 939 |
< |
|
| 940 |
< |
// logicals |
| 941 |
< |
|
| 942 |
< |
bool i_is_Charge = data1.is_Charge; |
| 943 |
< |
bool i_is_Dipole = data1.is_Dipole; |
| 944 |
< |
|
| 945 |
< |
bool j_is_Charge = data2.is_Charge; |
| 946 |
< |
bool j_is_Dipole = data2.is_Dipole; |
| 947 |
< |
|
| 948 |
< |
RealType q_i, q_j; |
| 949 |
< |
|
| 950 |
< |
// The skippedCharge computation is needed by the real-space cutoff methods |
| 951 |
< |
// (i.e. shifted force and shifted potential) |
| 952 |
< |
|
| 953 |
< |
if (i_is_Charge) { |
| 954 |
< |
q_i = data1.charge; |
| 955 |
< |
*(idat.skippedCharge2) += q_i; |
| 956 |
< |
} |
| 957 |
< |
|
| 958 |
< |
if (j_is_Charge) { |
| 959 |
< |
q_j = data2.charge; |
| 960 |
< |
*(idat.skippedCharge1) += q_j; |
| 961 |
< |
} |
| 962 |
< |
|
| 963 |
< |
// the rest of this function should only be necessary for reaction field. |
| 964 |
< |
|
| 965 |
< |
if (summationMethod_ == esm_REACTION_FIELD) { |
| 966 |
< |
RealType riji, ri2, ri3; |
| 967 |
< |
RealType mu_i, ct_i; |
| 968 |
< |
RealType mu_j, ct_j; |
| 969 |
< |
RealType preVal, rfVal, vterm, dudr, pref, myPot(0.0); |
| 970 |
< |
Vector3d dVdr, uz_i, uz_j, duduz_i, duduz_j, rhat; |
| 971 |
< |
|
| 972 |
< |
// some variables we'll need independent of electrostatic type: |
| 983 |
> |
*(idat.vpair) += indirect_vpair; |
| 984 |
> |
(*(idat.pot))[ELECTROSTATIC_FAMILY] += indirect_Pot; |
| 985 |
> |
*(idat.f1) += indirect_dVdr; |
| 986 |
|
|
| 974 |
– |
riji = 1.0 / *(idat.rij) ; |
| 975 |
– |
rhat = *(idat.d) * riji; |
| 976 |
– |
|
| 977 |
– |
if (i_is_Dipole) { |
| 978 |
– |
mu_i = data1.dipole_moment; |
| 979 |
– |
uz_i = idat.eFrame1->getColumn(2); |
| 980 |
– |
ct_i = dot(uz_i, rhat); |
| 981 |
– |
duduz_i = V3Zero; |
| 982 |
– |
} |
| 983 |
– |
|
| 984 |
– |
if (j_is_Dipole) { |
| 985 |
– |
mu_j = data2.dipole_moment; |
| 986 |
– |
uz_j = idat.eFrame2->getColumn(2); |
| 987 |
– |
ct_j = dot(uz_j, rhat); |
| 988 |
– |
duduz_j = V3Zero; |
| 989 |
– |
} |
| 990 |
– |
|
| 991 |
– |
if (i_is_Charge) { |
| 992 |
– |
if (j_is_Charge) { |
| 993 |
– |
preVal = *(idat.electroMult) * pre11_ * q_i * q_j; |
| 994 |
– |
rfVal = preRF_ * *(idat.rij) * *(idat.rij) ; |
| 995 |
– |
vterm = preVal * rfVal; |
| 996 |
– |
myPot += *(idat.sw) * vterm; |
| 997 |
– |
dudr = *(idat.sw) * preVal * 2.0 * rfVal * riji; |
| 998 |
– |
dVdr += dudr * rhat; |
| 999 |
– |
} |
| 1000 |
– |
|
| 1001 |
– |
if (j_is_Dipole) { |
| 1002 |
– |
ri2 = riji * riji; |
| 1003 |
– |
ri3 = ri2 * riji; |
| 1004 |
– |
pref = *(idat.electroMult) * pre12_ * q_i * mu_j; |
| 1005 |
– |
vterm = - pref * ct_j * ( ri2 - preRF2_ * *(idat.rij) ); |
| 1006 |
– |
myPot += *(idat.sw) * vterm; |
| 1007 |
– |
dVdr += - *(idat.sw) * pref * ( ri3 * ( uz_j - 3.0 * ct_j * rhat) - preRF2_ * uz_j); |
| 1008 |
– |
duduz_j += - *(idat.sw) * pref * rhat * (ri2 - preRF2_ * *(idat.rij) ); |
| 1009 |
– |
} |
| 1010 |
– |
} |
| 1011 |
– |
if (i_is_Dipole) { |
| 1012 |
– |
if (j_is_Charge) { |
| 1013 |
– |
ri2 = riji * riji; |
| 1014 |
– |
ri3 = ri2 * riji; |
| 1015 |
– |
pref = *(idat.electroMult) * pre12_ * q_j * mu_i; |
| 1016 |
– |
vterm = - pref * ct_i * ( ri2 - preRF2_ * *(idat.rij) ); |
| 1017 |
– |
myPot += *(idat.sw) * vterm; |
| 1018 |
– |
dVdr += *(idat.sw) * pref * ( ri3 * ( uz_i - 3.0 * ct_i * rhat) - preRF2_ * uz_i); |
| 1019 |
– |
duduz_i += *(idat.sw) * pref * rhat * (ri2 - preRF2_ * *(idat.rij)); |
| 1020 |
– |
} |
| 1021 |
– |
} |
| 1022 |
– |
|
| 1023 |
– |
// accumulate the forces and torques resulting from the self term |
| 1024 |
– |
(*(idat.pot))[ELECTROSTATIC_FAMILY] += myPot; |
| 1025 |
– |
*(idat.f1) += dVdr; |
| 1026 |
– |
|
| 987 |
|
if (i_is_Dipole) |
| 988 |
< |
*(idat.t1) -= cross(uz_i, duduz_i); |
| 988 |
> |
*(idat.t1) -= cross(uz_i, indirect_duduz_i); |
| 989 |
|
if (j_is_Dipole) |
| 990 |
< |
*(idat.t2) -= cross(uz_j, duduz_j); |
| 990 |
> |
*(idat.t2) -= cross(uz_j, indirect_duduz_j); |
| 991 |
|
} |
| 992 |
< |
} |
| 992 |
> |
|
| 993 |
> |
|
| 994 |
> |
return; |
| 995 |
> |
} |
| 996 |
|
|
| 997 |
|
void Electrostatic::calcSelfCorrection(SelfData &sdat) { |
| 998 |
|
RealType mu1, preVal, chg1, self; |
