| 35 |
|
* |
| 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). |
| 38 |
> |
* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008). |
| 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 "config.h" |
| 44 |
+ |
#include <cmath> |
| 45 |
+ |
|
| 46 |
|
#include "primitives/Torsion.hpp" |
| 47 |
|
|
| 48 |
|
namespace OpenMD { |
| 49 |
|
|
| 50 |
|
Torsion::Torsion(Atom *atom1, Atom *atom2, Atom *atom3, Atom *atom4, |
| 51 |
< |
TorsionType *tt) : |
| 52 |
< |
atom1_(atom1), atom2_(atom2), atom3_(atom3), atom4_(atom4), torsionType_(tt) { } |
| 51 |
> |
TorsionType *tt) : ShortRangeInteraction(), |
| 52 |
> |
torsionType_(tt) { |
| 53 |
> |
atoms_.resize(4); |
| 54 |
> |
atoms_[0] = atom1; |
| 55 |
> |
atoms_[1] = atom2; |
| 56 |
> |
atoms_[2] = atom3; |
| 57 |
> |
atoms_[3] = atom4; |
| 58 |
> |
} |
| 59 |
|
|
| 60 |
< |
void Torsion::calcForce(RealType& angle) { |
| 60 |
> |
void Torsion::calcForce(RealType& angle, bool doParticlePot) { |
| 61 |
|
|
| 62 |
< |
Vector3d pos1 = atom1_->getPos(); |
| 63 |
< |
Vector3d pos2 = atom2_->getPos(); |
| 64 |
< |
Vector3d pos3 = atom3_->getPos(); |
| 65 |
< |
Vector3d pos4 = atom4_->getPos(); |
| 62 |
> |
Vector3d pos1 = atoms_[0]->getPos(); |
| 63 |
> |
Vector3d pos2 = atoms_[1]->getPos(); |
| 64 |
> |
Vector3d pos3 = atoms_[2]->getPos(); |
| 65 |
> |
Vector3d pos4 = atoms_[3]->getPos(); |
| 66 |
|
|
| 67 |
|
Vector3d r21 = pos1 - pos2; |
| 68 |
|
Vector3d r32 = pos2 - pos3; |
| 103 |
|
f2 = dVdcosPhi * ( cross(r43, dcosdB) - cross(r21, dcosdA)); |
| 104 |
|
f3 = dVdcosPhi * cross(dcosdB, r32); |
| 105 |
|
|
| 106 |
< |
atom1_->addFrc(f1); |
| 107 |
< |
atom2_->addFrc(f2 - f1); |
| 108 |
< |
atom3_->addFrc(f3 - f2); |
| 109 |
< |
atom4_->addFrc(-f3); |
| 106 |
> |
atoms_[0]->addFrc(f1); |
| 107 |
> |
atoms_[1]->addFrc(f2 - f1); |
| 108 |
> |
atoms_[2]->addFrc(f3 - f2); |
| 109 |
> |
atoms_[3]->addFrc(-f3); |
| 110 |
|
|
| 111 |
< |
atom1_->addParticlePot(potential_); |
| 112 |
< |
atom2_->addParticlePot(potential_); |
| 113 |
< |
atom3_->addParticlePot(potential_); |
| 114 |
< |
atom4_->addParticlePot(potential_); |
| 111 |
> |
if (doParticlePot) { |
| 112 |
> |
atoms_[0]->addParticlePot(potential_); |
| 113 |
> |
atoms_[1]->addParticlePot(potential_); |
| 114 |
> |
atoms_[2]->addParticlePot(potential_); |
| 115 |
> |
atoms_[3]->addParticlePot(potential_); |
| 116 |
> |
} |
| 117 |
|
|
| 118 |
|
angle = acos(cos_phi) /M_PI * 180.0; |
| 119 |
|
} |
