| 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). |
| 40 |
|
*/ |
| 52 |
|
namespace OpenMD { |
| 53 |
|
|
| 54 |
|
Electrostatic::Electrostatic(): name_("Electrostatic"), initialized_(false), |
| 55 |
< |
forceField_(NULL) {} |
| 55 |
> |
forceField_(NULL), info_(NULL), |
| 56 |
> |
haveCutoffRadius_(false), |
| 57 |
> |
haveDampingAlpha_(false), |
| 58 |
> |
haveDielectric_(false), |
| 59 |
> |
haveElectroSpline_(false) |
| 60 |
> |
{} |
| 61 |
|
|
| 62 |
|
void Electrostatic::initialize() { |
| 63 |
+ |
|
| 64 |
+ |
Globals* simParams_ = info_->getSimParams(); |
| 65 |
|
|
| 59 |
– |
Globals* simParams_; |
| 60 |
– |
|
| 66 |
|
summationMap_["HARD"] = esm_HARD; |
| 67 |
|
summationMap_["SWITCHING_FUNCTION"] = esm_SWITCHING_FUNCTION; |
| 68 |
|
summationMap_["SHIFTED_POTENTIAL"] = esm_SHIFTED_POTENTIAL; |
| 102 |
|
screeningMethod_ = UNDAMPED; |
| 103 |
|
dielectric_ = 1.0; |
| 104 |
|
one_third_ = 1.0 / 3.0; |
| 100 |
– |
haveCutoffRadius_ = false; |
| 101 |
– |
haveDampingAlpha_ = false; |
| 102 |
– |
haveDielectric_ = false; |
| 103 |
– |
haveElectroSpline_ = false; |
| 105 |
|
|
| 106 |
|
// check the summation method: |
| 107 |
|
if (simParams_->haveElectrostaticSummationMethod()) { |
| 408 |
|
return; |
| 409 |
|
} |
| 410 |
|
|
| 411 |
< |
void Electrostatic::setElectrostaticCutoffRadius( RealType theECR, |
| 412 |
< |
RealType theRSW ) { |
| 412 |
< |
cutoffRadius_ = theECR; |
| 411 |
> |
void Electrostatic::setCutoffRadius( RealType rCut ) { |
| 412 |
> |
cutoffRadius_ = rCut; |
| 413 |
|
rrf_ = cutoffRadius_; |
| 414 |
– |
rt_ = theRSW; |
| 414 |
|
haveCutoffRadius_ = true; |
| 415 |
|
} |
| 416 |
+ |
|
| 417 |
+ |
void Electrostatic::setSwitchingRadius( RealType rSwitch ) { |
| 418 |
+ |
rt_ = rSwitch; |
| 419 |
+ |
} |
| 420 |
|
void Electrostatic::setElectrostaticSummationMethod( ElectrostaticSummationMethod esm ) { |
| 421 |
|
summationMethod_ = esm; |
| 422 |
|
} |
| 446 |
|
RealType ct_i, ct_j, ct_ij, a1; |
| 447 |
|
RealType riji, ri, ri2, ri3, ri4; |
| 448 |
|
RealType pref, vterm, epot, dudr; |
| 449 |
+ |
RealType vpair(0.0); |
| 450 |
|
RealType scale, sc2; |
| 451 |
|
RealType pot_term, preVal, rfVal; |
| 452 |
|
RealType c2ri, c3ri, c4rij, cti3, ctj3, ctidotj; |
| 453 |
|
RealType preSw, preSwSc; |
| 454 |
|
RealType c1, c2, c3, c4; |
| 455 |
< |
RealType erfcVal, derfcVal; |
| 455 |
> |
RealType erfcVal(1.0), derfcVal(0.0); |
| 456 |
|
RealType BigR; |
| 457 |
|
|
| 458 |
|
Vector3d Q_i, Q_j; |
| 463 |
|
Vector3d rhatdot2, rhatc4; |
| 464 |
|
Vector3d dVdr; |
| 465 |
|
|
| 466 |
+ |
// variables for indirect (reaction field) interactions for excluded pairs: |
| 467 |
+ |
RealType indirect_Pot(0.0); |
| 468 |
+ |
RealType indirect_vpair(0.0); |
| 469 |
+ |
Vector3d indirect_dVdr(V3Zero); |
| 470 |
+ |
Vector3d indirect_duduz_i(V3Zero), indirect_duduz_j(V3Zero); |
| 471 |
+ |
|
| 472 |
|
pair<RealType, RealType> res; |
| 473 |
|
|
| 474 |
|
if (!initialized_) initialize(); |
| 478 |
|
|
| 479 |
|
// some variables we'll need independent of electrostatic type: |
| 480 |
|
|
| 481 |
< |
riji = 1.0 / idat.rij; |
| 482 |
< |
Vector3d rhat = idat.d * riji; |
| 481 |
> |
riji = 1.0 / *(idat.rij) ; |
| 482 |
> |
Vector3d rhat = *(idat.d) * riji; |
| 483 |
|
|
| 484 |
|
// logicals |
| 485 |
|
|
| 493 |
|
bool j_is_SplitDipole = data2.is_SplitDipole; |
| 494 |
|
bool j_is_Quadrupole = data2.is_Quadrupole; |
| 495 |
|
|
| 496 |
< |
if (i_is_Charge) |
| 496 |
> |
if (i_is_Charge) { |
| 497 |
|
q_i = data1.charge; |
| 498 |
+ |
if (idat.excluded) { |
| 499 |
+ |
*(idat.skippedCharge2) += q_i; |
| 500 |
+ |
} |
| 501 |
+ |
} |
| 502 |
|
|
| 503 |
|
if (i_is_Dipole) { |
| 504 |
|
mu_i = data1.dipole_moment; |
| 505 |
< |
uz_i = idat.eFrame1.getColumn(2); |
| 505 |
> |
uz_i = idat.eFrame1->getColumn(2); |
| 506 |
|
|
| 507 |
|
ct_i = dot(uz_i, rhat); |
| 508 |
|
|
| 518 |
|
qyy_i = Q_i.y(); |
| 519 |
|
qzz_i = Q_i.z(); |
| 520 |
|
|
| 521 |
< |
ux_i = idat.eFrame1.getColumn(0); |
| 522 |
< |
uy_i = idat.eFrame1.getColumn(1); |
| 523 |
< |
uz_i = idat.eFrame1.getColumn(2); |
| 521 |
> |
ux_i = idat.eFrame1->getColumn(0); |
| 522 |
> |
uy_i = idat.eFrame1->getColumn(1); |
| 523 |
> |
uz_i = idat.eFrame1->getColumn(2); |
| 524 |
|
|
| 525 |
|
cx_i = dot(ux_i, rhat); |
| 526 |
|
cy_i = dot(uy_i, rhat); |
| 531 |
|
duduz_i = V3Zero; |
| 532 |
|
} |
| 533 |
|
|
| 534 |
< |
if (j_is_Charge) |
| 534 |
> |
if (j_is_Charge) { |
| 535 |
|
q_j = data2.charge; |
| 536 |
+ |
if (idat.excluded) { |
| 537 |
+ |
*(idat.skippedCharge1) += q_j; |
| 538 |
+ |
} |
| 539 |
+ |
} |
| 540 |
|
|
| 541 |
+ |
|
| 542 |
|
if (j_is_Dipole) { |
| 543 |
|
mu_j = data2.dipole_moment; |
| 544 |
< |
uz_j = idat.eFrame2.getColumn(2); |
| 544 |
> |
uz_j = idat.eFrame2->getColumn(2); |
| 545 |
|
|
| 546 |
|
ct_j = dot(uz_j, rhat); |
| 547 |
|
|
| 557 |
|
qyy_j = Q_j.y(); |
| 558 |
|
qzz_j = Q_j.z(); |
| 559 |
|
|
| 560 |
< |
ux_j = idat.eFrame2.getColumn(0); |
| 561 |
< |
uy_j = idat.eFrame2.getColumn(1); |
| 562 |
< |
uz_j = idat.eFrame2.getColumn(2); |
| 560 |
> |
ux_j = idat.eFrame2->getColumn(0); |
| 561 |
> |
uy_j = idat.eFrame2->getColumn(1); |
| 562 |
> |
uz_j = idat.eFrame2->getColumn(2); |
| 563 |
|
|
| 564 |
|
cx_j = dot(ux_j, rhat); |
| 565 |
|
cy_j = dot(uy_j, rhat); |
| 578 |
|
if (j_is_Charge) { |
| 579 |
|
if (screeningMethod_ == DAMPED) { |
| 580 |
|
// assemble the damping variables |
| 581 |
< |
res = erfcSpline_->getValueAndDerivativeAt(idat.rij); |
| 581 |
> |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 582 |
|
erfcVal = res.first; |
| 583 |
|
derfcVal = res.second; |
| 584 |
|
c1 = erfcVal * riji; |
| 588 |
|
c2 = c1 * riji; |
| 589 |
|
} |
| 590 |
|
|
| 591 |
< |
preVal = idat.electroMult * pre11_ * q_i * q_j; |
| 591 |
> |
preVal = *(idat.electroMult) * pre11_ * q_i * q_j; |
| 592 |
|
|
| 593 |
|
if (summationMethod_ == esm_SHIFTED_POTENTIAL) { |
| 594 |
|
vterm = preVal * (c1 - c1c_); |
| 595 |
< |
dudr = -idat.sw * preVal * c2; |
| 595 |
> |
dudr = - *(idat.sw) * preVal * c2; |
| 596 |
|
|
| 597 |
|
} else if (summationMethod_ == esm_SHIFTED_FORCE) { |
| 598 |
< |
vterm = preVal * ( c1 - c1c_ + c2c_*(idat.rij - cutoffRadius_) ); |
| 599 |
< |
dudr = idat.sw * preVal * (c2c_ - c2); |
| 598 |
> |
vterm = preVal * ( c1 - c1c_ + c2c_*( *(idat.rij) - cutoffRadius_) ); |
| 599 |
> |
dudr = *(idat.sw) * preVal * (c2c_ - c2); |
| 600 |
|
|
| 601 |
|
} else if (summationMethod_ == esm_REACTION_FIELD) { |
| 602 |
< |
rfVal = idat.electroMult * preRF_ * idat.rij * idat.rij; |
| 602 |
> |
rfVal = preRF_ * *(idat.rij) * *(idat.rij); |
| 603 |
> |
|
| 604 |
|
vterm = preVal * ( riji + rfVal ); |
| 605 |
< |
dudr = idat.sw * preVal * ( 2.0 * rfVal - riji ) * riji; |
| 605 |
> |
dudr = *(idat.sw) * preVal * ( 2.0 * rfVal - riji ) * riji; |
| 606 |
> |
|
| 607 |
> |
// if this is an excluded pair, there are still indirect |
| 608 |
> |
// interactions via the reaction field we must worry about: |
| 609 |
|
|
| 610 |
+ |
if (idat.excluded) { |
| 611 |
+ |
indirect_vpair += preVal * rfVal; |
| 612 |
+ |
indirect_Pot += *(idat.sw) * preVal * rfVal; |
| 613 |
+ |
indirect_dVdr += *(idat.sw) * preVal * 2.0 * rfVal * riji * rhat; |
| 614 |
+ |
} |
| 615 |
+ |
|
| 616 |
|
} else { |
| 588 |
– |
vterm = preVal * riji * erfcVal; |
| 617 |
|
|
| 618 |
< |
dudr = - idat.sw * preVal * c2; |
| 618 |
> |
vterm = preVal * riji * erfcVal; |
| 619 |
> |
dudr = - *(idat.sw) * preVal * c2; |
| 620 |
|
|
| 621 |
|
} |
| 593 |
– |
|
| 594 |
– |
idat.vpair[2] += vterm; |
| 595 |
– |
epot += idat.sw * vterm; |
| 622 |
|
|
| 623 |
< |
dVdr += dudr * rhat; |
| 623 |
> |
vpair += vterm; |
| 624 |
> |
epot += *(idat.sw) * vterm; |
| 625 |
> |
dVdr += dudr * rhat; |
| 626 |
|
} |
| 627 |
|
|
| 628 |
|
if (j_is_Dipole) { |
| 629 |
|
// pref is used by all the possible methods |
| 630 |
< |
pref = idat.electroMult * pre12_ * q_i * mu_j; |
| 631 |
< |
preSw = idat.sw * pref; |
| 630 |
> |
pref = *(idat.electroMult) * pre12_ * q_i * mu_j; |
| 631 |
> |
preSw = *(idat.sw) * pref; |
| 632 |
|
|
| 633 |
|
if (summationMethod_ == esm_REACTION_FIELD) { |
| 634 |
|
ri2 = riji * riji; |
| 635 |
|
ri3 = ri2 * riji; |
| 636 |
|
|
| 637 |
< |
vterm = - pref * ct_j * ( ri2 - preRF2_ * idat.rij ); |
| 638 |
< |
idat.vpair[2] += vterm; |
| 639 |
< |
epot += idat.sw * vterm; |
| 637 |
> |
vterm = - pref * ct_j * ( ri2 - preRF2_ * *(idat.rij) ); |
| 638 |
> |
vpair += vterm; |
| 639 |
> |
epot += *(idat.sw) * vterm; |
| 640 |
|
|
| 641 |
|
dVdr += -preSw * (ri3 * (uz_j - 3.0 * ct_j * rhat) - preRF2_*uz_j); |
| 642 |
< |
duduz_j += -preSw * rhat * (ri2 - preRF2_ * idat.rij); |
| 642 |
> |
duduz_j += -preSw * rhat * (ri2 - preRF2_ * *(idat.rij) ); |
| 643 |
|
|
| 644 |
+ |
// Even if we excluded this pair from direct interactions, |
| 645 |
+ |
// we still have the reaction-field-mediated charge-dipole |
| 646 |
+ |
// interaction: |
| 647 |
+ |
|
| 648 |
+ |
if (idat.excluded) { |
| 649 |
+ |
indirect_vpair += pref * ct_j * preRF2_ * *(idat.rij); |
| 650 |
+ |
indirect_Pot += preSw * ct_j * preRF2_ * *(idat.rij); |
| 651 |
+ |
indirect_dVdr += preSw * preRF2_ * uz_j; |
| 652 |
+ |
indirect_duduz_j += preSw * rhat * preRF2_ * *(idat.rij); |
| 653 |
+ |
} |
| 654 |
+ |
|
| 655 |
|
} else { |
| 656 |
|
// determine the inverse r used if we have split dipoles |
| 657 |
|
if (j_is_SplitDipole) { |
| 658 |
< |
BigR = sqrt(idat.r2 + 0.25 * d_j * d_j); |
| 658 |
> |
BigR = sqrt( *(idat.r2) + 0.25 * d_j * d_j); |
| 659 |
|
ri = 1.0 / BigR; |
| 660 |
< |
scale = idat.rij * ri; |
| 660 |
> |
scale = *(idat.rij) * ri; |
| 661 |
|
} else { |
| 662 |
|
ri = riji; |
| 663 |
|
scale = 1.0; |
| 667 |
|
|
| 668 |
|
if (screeningMethod_ == DAMPED) { |
| 669 |
|
// assemble the damping variables |
| 670 |
< |
res = erfcSpline_->getValueAndDerivativeAt(idat.rij); |
| 670 |
> |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 671 |
|
erfcVal = res.first; |
| 672 |
|
derfcVal = res.second; |
| 673 |
|
c1 = erfcVal * ri; |
| 684 |
|
// calculate the potential |
| 685 |
|
pot_term = scale * c2; |
| 686 |
|
vterm = -pref * ct_j * pot_term; |
| 687 |
< |
idat.vpair[2] += vterm; |
| 688 |
< |
epot += idat.sw * vterm; |
| 687 |
> |
vpair += vterm; |
| 688 |
> |
epot += *(idat.sw) * vterm; |
| 689 |
|
|
| 690 |
|
// calculate derivatives for forces and torques |
| 691 |
|
|
| 700 |
|
cx2 = cx_j * cx_j; |
| 701 |
|
cy2 = cy_j * cy_j; |
| 702 |
|
cz2 = cz_j * cz_j; |
| 703 |
< |
pref = idat.electroMult * pre14_ * q_i * one_third_; |
| 703 |
> |
pref = *(idat.electroMult) * pre14_ * q_i * one_third_; |
| 704 |
|
|
| 705 |
|
if (screeningMethod_ == DAMPED) { |
| 706 |
|
// assemble the damping variables |
| 707 |
< |
res = erfcSpline_->getValueAndDerivativeAt(idat.rij); |
| 707 |
> |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 708 |
|
erfcVal = res.first; |
| 709 |
|
derfcVal = res.second; |
| 710 |
|
c1 = erfcVal * riji; |
| 719 |
|
} |
| 720 |
|
|
| 721 |
|
// precompute variables for convenience |
| 722 |
< |
preSw = idat.sw * pref; |
| 722 |
> |
preSw = *(idat.sw) * pref; |
| 723 |
|
c2ri = c2 * riji; |
| 724 |
|
c3ri = c3 * riji; |
| 725 |
< |
c4rij = c4 * idat.rij; |
| 725 |
> |
c4rij = c4 * *(idat.rij) ; |
| 726 |
|
rhatdot2 = 2.0 * rhat * c3; |
| 727 |
|
rhatc4 = rhat * c4rij; |
| 728 |
|
|
| 731 |
|
qyy_j * (cy2*c3 - c2ri) + |
| 732 |
|
qzz_j * (cz2*c3 - c2ri) ); |
| 733 |
|
vterm = pref * pot_term; |
| 734 |
< |
idat.vpair[2] += vterm; |
| 735 |
< |
epot += idat.sw * vterm; |
| 734 |
> |
vpair += vterm; |
| 735 |
> |
epot += *(idat.sw) * vterm; |
| 736 |
|
|
| 737 |
|
// calculate derivatives for the forces and torques |
| 738 |
|
|
| 750 |
|
|
| 751 |
|
if (j_is_Charge) { |
| 752 |
|
// variables used by all the methods |
| 753 |
< |
pref = idat.electroMult * pre12_ * q_j * mu_i; |
| 754 |
< |
preSw = idat.sw * pref; |
| 753 |
> |
pref = *(idat.electroMult) * pre12_ * q_j * mu_i; |
| 754 |
> |
preSw = *(idat.sw) * pref; |
| 755 |
|
|
| 756 |
|
if (summationMethod_ == esm_REACTION_FIELD) { |
| 757 |
|
|
| 758 |
|
ri2 = riji * riji; |
| 759 |
|
ri3 = ri2 * riji; |
| 760 |
|
|
| 761 |
< |
vterm = pref * ct_i * ( ri2 - preRF2_ * idat.rij ); |
| 762 |
< |
idat.vpair[2] += vterm; |
| 763 |
< |
epot += idat.sw * vterm; |
| 761 |
> |
vterm = pref * ct_i * ( ri2 - preRF2_ * *(idat.rij) ); |
| 762 |
> |
vpair += vterm; |
| 763 |
> |
epot += *(idat.sw) * vterm; |
| 764 |
|
|
| 765 |
|
dVdr += preSw * (ri3 * (uz_i - 3.0 * ct_i * rhat) - preRF2_ * uz_i); |
| 766 |
|
|
| 767 |
< |
duduz_i += preSw * rhat * (ri2 - preRF2_ * idat.rij); |
| 767 |
> |
duduz_i += preSw * rhat * (ri2 - preRF2_ * *(idat.rij) ); |
| 768 |
> |
|
| 769 |
> |
// Even if we excluded this pair from direct interactions, |
| 770 |
> |
// we still have the reaction-field-mediated charge-dipole |
| 771 |
> |
// interaction: |
| 772 |
> |
|
| 773 |
> |
if (idat.excluded) { |
| 774 |
> |
indirect_vpair += -pref * ct_i * preRF2_ * *(idat.rij); |
| 775 |
> |
indirect_Pot += -preSw * ct_i * preRF2_ * *(idat.rij); |
| 776 |
> |
indirect_dVdr += -preSw * preRF2_ * uz_i; |
| 777 |
> |
indirect_duduz_i += -preSw * rhat * preRF2_ * *(idat.rij); |
| 778 |
> |
} |
| 779 |
|
|
| 780 |
|
} else { |
| 781 |
|
|
| 782 |
|
// determine inverse r if we are using split dipoles |
| 783 |
|
if (i_is_SplitDipole) { |
| 784 |
< |
BigR = sqrt(idat.r2 + 0.25 * d_i * d_i); |
| 784 |
> |
BigR = sqrt( *(idat.r2) + 0.25 * d_i * d_i); |
| 785 |
|
ri = 1.0 / BigR; |
| 786 |
< |
scale = idat.rij * ri; |
| 786 |
> |
scale = *(idat.rij) * ri; |
| 787 |
|
} else { |
| 788 |
|
ri = riji; |
| 789 |
|
scale = 1.0; |
| 793 |
|
|
| 794 |
|
if (screeningMethod_ == DAMPED) { |
| 795 |
|
// assemble the damping variables |
| 796 |
< |
res = erfcSpline_->getValueAndDerivativeAt(idat.rij); |
| 796 |
> |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 797 |
|
erfcVal = res.first; |
| 798 |
|
derfcVal = res.second; |
| 799 |
|
c1 = erfcVal * ri; |
| 810 |
|
// calculate the potential |
| 811 |
|
pot_term = c2 * scale; |
| 812 |
|
vterm = pref * ct_i * pot_term; |
| 813 |
< |
idat.vpair[2] += vterm; |
| 814 |
< |
epot += idat.sw * vterm; |
| 813 |
> |
vpair += vterm; |
| 814 |
> |
epot += *(idat.sw) * vterm; |
| 815 |
|
|
| 816 |
|
// calculate derivatives for the forces and torques |
| 817 |
|
dVdr += preSw * (uz_i * c2ri - ct_i * rhat * sc2 * c3); |
| 823 |
|
// variables used by all methods |
| 824 |
|
ct_ij = dot(uz_i, uz_j); |
| 825 |
|
|
| 826 |
< |
pref = idat.electroMult * pre22_ * mu_i * mu_j; |
| 827 |
< |
preSw = idat.sw * pref; |
| 826 |
> |
pref = *(idat.electroMult) * pre22_ * mu_i * mu_j; |
| 827 |
> |
preSw = *(idat.sw) * pref; |
| 828 |
|
|
| 829 |
|
if (summationMethod_ == esm_REACTION_FIELD) { |
| 830 |
|
ri2 = riji * riji; |
| 833 |
|
|
| 834 |
|
vterm = pref * ( ri3 * (ct_ij - 3.0 * ct_i * ct_j) - |
| 835 |
|
preRF2_ * ct_ij ); |
| 836 |
< |
idat.vpair[2] += vterm; |
| 837 |
< |
epot += idat.sw * vterm; |
| 836 |
> |
vpair += vterm; |
| 837 |
> |
epot += *(idat.sw) * vterm; |
| 838 |
|
|
| 839 |
|
a1 = 5.0 * ct_i * ct_j - ct_ij; |
| 840 |
|
|
| 843 |
|
duduz_i += preSw * (ri3 * (uz_j - 3.0 * ct_j * rhat) - preRF2_*uz_j); |
| 844 |
|
duduz_j += preSw * (ri3 * (uz_i - 3.0 * ct_i * rhat) - preRF2_*uz_i); |
| 845 |
|
|
| 846 |
+ |
if (idat.excluded) { |
| 847 |
+ |
indirect_vpair += - pref * preRF2_ * ct_ij; |
| 848 |
+ |
indirect_Pot += - preSw * preRF2_ * ct_ij; |
| 849 |
+ |
indirect_duduz_i += -preSw * preRF2_ * uz_j; |
| 850 |
+ |
indirect_duduz_j += -preSw * preRF2_ * uz_i; |
| 851 |
+ |
} |
| 852 |
+ |
|
| 853 |
|
} else { |
| 854 |
|
|
| 855 |
|
if (i_is_SplitDipole) { |
| 856 |
|
if (j_is_SplitDipole) { |
| 857 |
< |
BigR = sqrt(idat.r2 + 0.25 * d_i * d_i + 0.25 * d_j * d_j); |
| 857 |
> |
BigR = sqrt( *(idat.r2) + 0.25 * d_i * d_i + 0.25 * d_j * d_j); |
| 858 |
|
} else { |
| 859 |
< |
BigR = sqrt(idat.r2 + 0.25 * d_i * d_i); |
| 859 |
> |
BigR = sqrt( *(idat.r2) + 0.25 * d_i * d_i); |
| 860 |
|
} |
| 861 |
|
ri = 1.0 / BigR; |
| 862 |
< |
scale = idat.rij * ri; |
| 862 |
> |
scale = *(idat.rij) * ri; |
| 863 |
|
} else { |
| 864 |
|
if (j_is_SplitDipole) { |
| 865 |
< |
BigR = sqrt(idat.r2 + 0.25 * d_j * d_j); |
| 865 |
> |
BigR = sqrt( *(idat.r2) + 0.25 * d_j * d_j); |
| 866 |
|
ri = 1.0 / BigR; |
| 867 |
< |
scale = idat.rij * ri; |
| 867 |
> |
scale = *(idat.rij) * ri; |
| 868 |
|
} else { |
| 869 |
|
ri = riji; |
| 870 |
|
scale = 1.0; |
| 872 |
|
} |
| 873 |
|
if (screeningMethod_ == DAMPED) { |
| 874 |
|
// assemble damping variables |
| 875 |
< |
res = erfcSpline_->getValueAndDerivativeAt(idat.rij); |
| 875 |
> |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 876 |
|
erfcVal = res.first; |
| 877 |
|
derfcVal = res.second; |
| 878 |
|
c1 = erfcVal * ri; |
| 894 |
|
preSwSc = preSw * scale; |
| 895 |
|
c2ri = c2 * ri; |
| 896 |
|
c3ri = c3 * ri; |
| 897 |
< |
c4rij = c4 * idat.rij; |
| 897 |
> |
c4rij = c4 * *(idat.rij) ; |
| 898 |
|
|
| 899 |
|
// calculate the potential |
| 900 |
|
pot_term = (ct_ij * c2ri - ctidotj * c3); |
| 901 |
|
vterm = pref * pot_term; |
| 902 |
< |
idat.vpair[2] += vterm; |
| 903 |
< |
epot += idat.sw * vterm; |
| 902 |
> |
vpair += vterm; |
| 903 |
> |
epot += *(idat.sw) * vterm; |
| 904 |
|
|
| 905 |
|
// calculate derivatives for the forces and torques |
| 906 |
|
dVdr += preSwSc * ( ctidotj * rhat * c4rij - |
| 919 |
|
cy2 = cy_i * cy_i; |
| 920 |
|
cz2 = cz_i * cz_i; |
| 921 |
|
|
| 922 |
< |
pref = idat.electroMult * pre14_ * q_j * one_third_; |
| 922 |
> |
pref = *(idat.electroMult) * pre14_ * q_j * one_third_; |
| 923 |
|
|
| 924 |
|
if (screeningMethod_ == DAMPED) { |
| 925 |
|
// assemble the damping variables |
| 926 |
< |
res = erfcSpline_->getValueAndDerivativeAt(idat.rij); |
| 926 |
> |
res = erfcSpline_->getValueAndDerivativeAt( *(idat.rij) ); |
| 927 |
|
erfcVal = res.first; |
| 928 |
|
derfcVal = res.second; |
| 929 |
|
c1 = erfcVal * riji; |
| 938 |
|
} |
| 939 |
|
|
| 940 |
|
// precompute some variables for convenience |
| 941 |
< |
preSw = idat.sw * pref; |
| 941 |
> |
preSw = *(idat.sw) * pref; |
| 942 |
|
c2ri = c2 * riji; |
| 943 |
|
c3ri = c3 * riji; |
| 944 |
< |
c4rij = c4 * idat.rij; |
| 944 |
> |
c4rij = c4 * *(idat.rij) ; |
| 945 |
|
rhatdot2 = 2.0 * rhat * c3; |
| 946 |
|
rhatc4 = rhat * c4rij; |
| 947 |
|
|
| 951 |
|
qzz_i * (cz2 * c3 - c2ri) ); |
| 952 |
|
|
| 953 |
|
vterm = pref * pot_term; |
| 954 |
< |
idat.vpair[2] += vterm; |
| 955 |
< |
epot += idat.sw * vterm; |
| 954 |
> |
vpair += vterm; |
| 955 |
> |
epot += *(idat.sw) * vterm; |
| 956 |
|
|
| 957 |
|
// calculate the derivatives for the forces and torques |
| 958 |
|
|
| 966 |
|
} |
| 967 |
|
} |
| 968 |
|
|
| 912 |
– |
idat.pot[2] += epot; |
| 913 |
– |
idat.f1 += dVdr; |
| 969 |
|
|
| 970 |
< |
if (i_is_Dipole || i_is_Quadrupole) |
| 971 |
< |
idat.t1 -= cross(uz_i, duduz_i); |
| 972 |
< |
if (i_is_Quadrupole) { |
| 973 |
< |
idat.t1 -= cross(ux_i, dudux_i); |
| 974 |
< |
idat.t1 -= cross(uy_i, duduy_i); |
| 975 |
< |
} |
| 970 |
> |
if (!idat.excluded) { |
| 971 |
> |
*(idat.vpair) += vpair; |
| 972 |
> |
(*(idat.pot))[ELECTROSTATIC_FAMILY] += epot; |
| 973 |
> |
*(idat.f1) += dVdr; |
| 974 |
> |
|
| 975 |
> |
if (i_is_Dipole || i_is_Quadrupole) |
| 976 |
> |
*(idat.t1) -= cross(uz_i, duduz_i); |
| 977 |
> |
if (i_is_Quadrupole) { |
| 978 |
> |
*(idat.t1) -= cross(ux_i, dudux_i); |
| 979 |
> |
*(idat.t1) -= cross(uy_i, duduy_i); |
| 980 |
> |
} |
| 981 |
> |
|
| 982 |
> |
if (j_is_Dipole || j_is_Quadrupole) |
| 983 |
> |
*(idat.t2) -= cross(uz_j, duduz_j); |
| 984 |
> |
if (j_is_Quadrupole) { |
| 985 |
> |
*(idat.t2) -= cross(uz_j, dudux_j); |
| 986 |
> |
*(idat.t2) -= cross(uz_j, duduy_j); |
| 987 |
> |
} |
| 988 |
|
|
| 989 |
< |
if (j_is_Dipole || j_is_Quadrupole) |
| 990 |
< |
idat.t2 -= cross(uz_j, duduz_j); |
| 991 |
< |
if (j_is_Quadrupole) { |
| 992 |
< |
idat.t2 -= cross(uz_j, dudux_j); |
| 993 |
< |
idat.t2 -= cross(uz_j, duduy_j); |
| 989 |
> |
} else { |
| 990 |
> |
|
| 991 |
> |
// only accumulate the forces and torques resulting from the |
| 992 |
> |
// indirect reaction field terms. |
| 993 |
> |
*(idat.vpair) += indirect_vpair; |
| 994 |
> |
(*(idat.pot))[ELECTROSTATIC_FAMILY] += indirect_Pot; |
| 995 |
> |
*(idat.f1) += indirect_dVdr; |
| 996 |
> |
|
| 997 |
> |
if (i_is_Dipole) |
| 998 |
> |
*(idat.t1) -= cross(uz_i, indirect_duduz_i); |
| 999 |
> |
if (j_is_Dipole) |
| 1000 |
> |
*(idat.t2) -= cross(uz_j, indirect_duduz_j); |
| 1001 |
|
} |
| 1002 |
|
|
| 1003 |
+ |
|
| 1004 |
|
return; |
| 1005 |
|
} |
| 1006 |
|
|
| 1020 |
|
bool j_is_Dipole = data2.is_Dipole; |
| 1021 |
|
|
| 1022 |
|
RealType q_i, q_j; |
| 948 |
– |
|
| 949 |
– |
// The skippedCharge computation is needed by the real-space cutoff methods |
| 950 |
– |
// (i.e. shifted force and shifted potential) |
| 1023 |
|
|
| 1024 |
+ |
// The skippedCharge computation is needed by the real-space |
| 1025 |
+ |
// cutoff methods (i.e. shifted force and shifted potential) |
| 1026 |
+ |
|
| 1027 |
|
if (i_is_Charge) { |
| 1028 |
|
q_i = data1.charge; |
| 1029 |
< |
idat.skippedCharge2 += q_i; |
| 1029 |
> |
*(idat.skippedCharge2) += q_i; |
| 1030 |
|
} |
| 1031 |
< |
|
| 1031 |
> |
|
| 1032 |
|
if (j_is_Charge) { |
| 1033 |
|
q_j = data2.charge; |
| 1034 |
< |
idat.skippedCharge1 += q_j; |
| 1034 |
> |
*(idat.skippedCharge1) += q_j; |
| 1035 |
|
} |
| 1036 |
|
|
| 1037 |
|
// the rest of this function should only be necessary for reaction field. |
| 1045 |
|
|
| 1046 |
|
// some variables we'll need independent of electrostatic type: |
| 1047 |
|
|
| 1048 |
< |
riji = 1.0 / idat.rij; |
| 1049 |
< |
rhat = idat.d * riji; |
| 1048 |
> |
riji = 1.0 / *(idat.rij) ; |
| 1049 |
> |
rhat = *(idat.d) * riji; |
| 1050 |
|
|
| 1051 |
|
if (i_is_Dipole) { |
| 1052 |
|
mu_i = data1.dipole_moment; |
| 1053 |
< |
uz_i = idat.eFrame1.getColumn(2); |
| 1053 |
> |
uz_i = idat.eFrame1->getColumn(2); |
| 1054 |
|
ct_i = dot(uz_i, rhat); |
| 1055 |
|
duduz_i = V3Zero; |
| 1056 |
|
} |
| 1057 |
|
|
| 1058 |
|
if (j_is_Dipole) { |
| 1059 |
|
mu_j = data2.dipole_moment; |
| 1060 |
< |
uz_j = idat.eFrame2.getColumn(2); |
| 1060 |
> |
uz_j = idat.eFrame2->getColumn(2); |
| 1061 |
|
ct_j = dot(uz_j, rhat); |
| 1062 |
|
duduz_j = V3Zero; |
| 1063 |
|
} |
| 1064 |
|
|
| 1065 |
|
if (i_is_Charge) { |
| 1066 |
|
if (j_is_Charge) { |
| 1067 |
< |
preVal = idat.electroMult * pre11_ * q_i * q_j; |
| 1068 |
< |
rfVal = preRF_ * idat.rij * idat.rij; |
| 1067 |
> |
preVal = *(idat.electroMult) * pre11_ * q_i * q_j; |
| 1068 |
> |
rfVal = preRF_ * *(idat.rij) * *(idat.rij) ; |
| 1069 |
|
vterm = preVal * rfVal; |
| 1070 |
< |
myPot += idat.sw * vterm; |
| 1071 |
< |
dudr = idat.sw * preVal * 2.0 * rfVal * riji; |
| 1070 |
> |
myPot += *(idat.sw) * vterm; |
| 1071 |
> |
dudr = *(idat.sw) * preVal * 2.0 * rfVal * riji; |
| 1072 |
|
dVdr += dudr * rhat; |
| 1073 |
|
} |
| 1074 |
|
|
| 1075 |
|
if (j_is_Dipole) { |
| 1076 |
|
ri2 = riji * riji; |
| 1077 |
|
ri3 = ri2 * riji; |
| 1078 |
< |
pref = idat.electroMult * pre12_ * q_i * mu_j; |
| 1079 |
< |
vterm = - pref * ct_j * ( ri2 - preRF2_ * idat.rij ); |
| 1080 |
< |
myPot += idat.sw * vterm; |
| 1081 |
< |
dVdr += -idat.sw * pref * ( ri3 * ( uz_j - 3.0 * ct_j * rhat) - preRF2_ * uz_j); |
| 1082 |
< |
duduz_j += -idat.sw * pref * rhat * (ri2 - preRF2_ * idat.rij); |
| 1078 |
> |
pref = *(idat.electroMult) * pre12_ * q_i * mu_j; |
| 1079 |
> |
vterm = - pref * ct_j * ( ri2 - preRF2_ * *(idat.rij) ); |
| 1080 |
> |
myPot += *(idat.sw) * vterm; |
| 1081 |
> |
dVdr += - *(idat.sw) * pref * ( ri3 * ( uz_j - 3.0 * ct_j * rhat) - preRF2_ * uz_j); |
| 1082 |
> |
duduz_j += - *(idat.sw) * pref * rhat * (ri2 - preRF2_ * *(idat.rij) ); |
| 1083 |
|
} |
| 1084 |
|
} |
| 1085 |
|
if (i_is_Dipole) { |
| 1086 |
|
if (j_is_Charge) { |
| 1087 |
|
ri2 = riji * riji; |
| 1088 |
|
ri3 = ri2 * riji; |
| 1089 |
< |
pref = idat.electroMult * pre12_ * q_j * mu_i; |
| 1090 |
< |
vterm = - pref * ct_i * ( ri2 - preRF2_ * idat.rij ); |
| 1091 |
< |
myPot += idat.sw * vterm; |
| 1092 |
< |
dVdr += idat.sw * pref * ( ri3 * ( uz_i - 3.0 * ct_i * rhat) - preRF2_ * uz_i); |
| 1093 |
< |
duduz_i += idat.sw * pref * rhat * (ri2 - preRF2_ * idat.rij); |
| 1089 |
> |
pref = *(idat.electroMult) * pre12_ * q_j * mu_i; |
| 1090 |
> |
vterm = - pref * ct_i * ( ri2 - preRF2_ * *(idat.rij) ); |
| 1091 |
> |
myPot += *(idat.sw) * vterm; |
| 1092 |
> |
dVdr += *(idat.sw) * pref * ( ri3 * ( uz_i - 3.0 * ct_i * rhat) - preRF2_ * uz_i); |
| 1093 |
> |
duduz_i += *(idat.sw) * pref * rhat * (ri2 - preRF2_ * *(idat.rij)); |
| 1094 |
|
} |
| 1095 |
|
} |
| 1096 |
|
|
| 1097 |
|
// accumulate the forces and torques resulting from the self term |
| 1098 |
< |
idat.pot[2] += myPot; |
| 1099 |
< |
idat.f1 += dVdr; |
| 1098 |
> |
(*(idat.pot))[ELECTROSTATIC_FAMILY] += myPot; |
| 1099 |
> |
*(idat.f1) += dVdr; |
| 1100 |
|
|
| 1101 |
|
if (i_is_Dipole) |
| 1102 |
< |
idat.t1 -= cross(uz_i, duduz_i); |
| 1102 |
> |
*(idat.t1) -= cross(uz_i, duduz_i); |
| 1103 |
|
if (j_is_Dipole) |
| 1104 |
< |
idat.t2 -= cross(uz_j, duduz_j); |
| 1104 |
> |
*(idat.t2) -= cross(uz_j, duduz_j); |
| 1105 |
|
} |
| 1106 |
|
} |
| 1107 |
|
|
| 1109 |
|
RealType mu1, preVal, chg1, self; |
| 1110 |
|
|
| 1111 |
|
if (!initialized_) initialize(); |
| 1112 |
< |
|
| 1112 |
> |
|
| 1113 |
|
ElectrostaticAtomData data = ElectrostaticMap[sdat.atype]; |
| 1114 |
|
|
| 1115 |
|
// logicals |
| 1041 |
– |
|
| 1116 |
|
bool i_is_Charge = data.is_Charge; |
| 1117 |
|
bool i_is_Dipole = data.is_Dipole; |
| 1118 |
|
|
| 1120 |
|
if (i_is_Dipole) { |
| 1121 |
|
mu1 = data.dipole_moment; |
| 1122 |
|
preVal = pre22_ * preRF2_ * mu1 * mu1; |
| 1123 |
< |
sdat.pot[2] -= 0.5 * preVal; |
| 1123 |
> |
(*(sdat.pot))[ELECTROSTATIC_FAMILY] -= 0.5 * preVal; |
| 1124 |
|
|
| 1125 |
|
// The self-correction term adds into the reaction field vector |
| 1126 |
< |
Vector3d uz_i = sdat.eFrame.getColumn(2); |
| 1126 |
> |
Vector3d uz_i = sdat.eFrame->getColumn(2); |
| 1127 |
|
Vector3d ei = preVal * uz_i; |
| 1128 |
|
|
| 1129 |
|
// This looks very wrong. A vector crossed with itself is zero. |
| 1130 |
< |
sdat.t -= cross(uz_i, ei); |
| 1130 |
> |
*(sdat.t) -= cross(uz_i, ei); |
| 1131 |
|
} |
| 1132 |
|
} else if (summationMethod_ == esm_SHIFTED_FORCE || summationMethod_ == esm_SHIFTED_POTENTIAL) { |
| 1133 |
|
if (i_is_Charge) { |
| 1134 |
|
chg1 = data.charge; |
| 1135 |
|
if (screeningMethod_ == DAMPED) { |
| 1136 |
< |
self = - 0.5 * (c1c_ + alphaPi_) * chg1 * (chg1 + sdat.skippedCharge) * pre11_; |
| 1136 |
> |
self = - 0.5 * (c1c_ + alphaPi_) * chg1 * (chg1 + *(sdat.skippedCharge)) * pre11_; |
| 1137 |
|
} else { |
| 1138 |
< |
self = - 0.5 * rcuti_ * chg1 * (chg1 + sdat.skippedCharge) * pre11_; |
| 1138 |
> |
self = - 0.5 * rcuti_ * chg1 * (chg1 + *(sdat.skippedCharge)) * pre11_; |
| 1139 |
|
} |
| 1140 |
< |
sdat.pot[2] += self; |
| 1140 |
> |
(*(sdat.pot))[ELECTROSTATIC_FAMILY] += self; |
| 1141 |
|
} |
| 1142 |
|
} |
| 1143 |
|
} |