src/brains/ForceManager.cpp

/*
 * Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
 *
 * The University of Notre Dame grants you ("Licensee") a
 * non-exclusive, royalty free, license to use, modify and
 * redistribute this software in source and binary code form, provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. All express or implied conditions, representations and
 * warranties, including any implied warranty of merchantability,
 * fitness for a particular purpose or non-infringement, are hereby
 * excluded.  The University of Notre Dame and its licensors shall not
 * be liable for any damages suffered by licensee as a result of
 * using, modifying or distributing the software or its
 * derivatives. In no event will the University of Notre Dame or its
 * licensors be liable for any lost revenue, profit or data, or for
 * direct, indirect, special, consequential, incidental or punitive
 * damages, however caused and regardless of the theory of liability,
 * arising out of the use of or inability to use software, even if the
 * University of Notre Dame has been advised of the possibility of
 * such damages.
 *
 * SUPPORT OPEN SCIENCE!  If you use OpenMD or its source code in your
 * research, please cite the appropriate papers when you publish your
 * work.  Good starting points are:
 *                                                                      
 * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
 * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
 * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
 * [4]  Vardeman & Gezelter, in progress (2009).                        
 */
 
/**
 * @file ForceManager.cpp
 * @author tlin
 * @date 11/09/2004
 * @time 10:39am
 * @version 1.0
 */

#include "brains/ForceManager.hpp"
#include "primitives/Molecule.hpp"
#include "UseTheForce/doForces_interface.h"
#define __OPENMD_C
#include "UseTheForce/DarkSide/fInteractionMap.h"
#include "utils/simError.h"
#include "primitives/Bond.hpp"
#include "primitives/Bend.hpp"
#include "primitives/Torsion.hpp"
#include "primitives/Inversion.hpp"
namespace OpenMD {

  void ForceManager::calcForces(bool needPotential, bool needStress) {
    
    if (!info_->isFortranInitialized()) {
      info_->update();
    }
    
    preCalculation();
    
    calcShortRangeInteraction();

    calcLongRangeInteraction(needPotential, needStress);

    postCalculation(needStress);
    
  }
  
  void ForceManager::preCalculation() {
    SimInfo::MoleculeIterator mi;
    Molecule* mol;
    Molecule::AtomIterator ai;
    Atom* atom;
    Molecule::RigidBodyIterator rbIter;
    RigidBody* rb;
    
    // forces are zeroed here, before any are accumulated.
    // NOTE: do not rezero the forces in Fortran.
    
    for (mol = info_->beginMolecule(mi); mol != NULL; 
         mol = info_->nextMolecule(mi)) {
      for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
        atom->zeroForcesAndTorques();
      }
          
      //change the positions of atoms which belong to the rigidbodies
      for (rb = mol->beginRigidBody(rbIter); rb != NULL; 
           rb = mol->nextRigidBody(rbIter)) {
        rb->zeroForcesAndTorques();
      }        
          
    }
    
    // Zero out the stress tensor
    tau *= 0.0;
    
  }
  
  void ForceManager::calcShortRangeInteraction() {
    Molecule* mol;
    RigidBody* rb;
    Bond* bond;
    Bend* bend;
    Torsion* torsion;
    Inversion* inversion;
    SimInfo::MoleculeIterator mi;
    Molecule::RigidBodyIterator rbIter;
    Molecule::BondIterator bondIter;;
    Molecule::BendIterator  bendIter;
    Molecule::TorsionIterator  torsionIter;
    Molecule::InversionIterator  inversionIter;
    RealType bondPotential = 0.0;
    RealType bendPotential = 0.0;
    RealType torsionPotential = 0.0;
    RealType inversionPotential = 0.0;

    //calculate short range interactions    
    for (mol = info_->beginMolecule(mi); mol != NULL; 
         mol = info_->nextMolecule(mi)) {

      //change the positions of atoms which belong to the rigidbodies
      for (rb = mol->beginRigidBody(rbIter); rb != NULL; 
           rb = mol->nextRigidBody(rbIter)) {
        rb->updateAtoms();
      }

      for (bond = mol->beginBond(bondIter); bond != NULL; 
           bond = mol->nextBond(bondIter)) {
        bond->calcForce();
        bondPotential += bond->getPotential();
      }

      for (bend = mol->beginBend(bendIter); bend != NULL; 
           bend = mol->nextBend(bendIter)) {
        
        RealType angle;
        bend->calcForce(angle);
        RealType currBendPot = bend->getPotential();          
         
        bendPotential += bend->getPotential();
        std::map<Bend*, BendDataSet>::iterator i = bendDataSets.find(bend);
        if (i == bendDataSets.end()) {
          BendDataSet dataSet;
          dataSet.prev.angle = dataSet.curr.angle = angle;
          dataSet.prev.potential = dataSet.curr.potential = currBendPot;
          dataSet.deltaV = 0.0;
          bendDataSets.insert(std::map<Bend*, BendDataSet>::value_type(bend, dataSet));
        }else {
          i->second.prev.angle = i->second.curr.angle;
          i->second.prev.potential = i->second.curr.potential;
          i->second.curr.angle = angle;
          i->second.curr.potential = currBendPot;
          i->second.deltaV =  fabs(i->second.curr.potential -  
                                   i->second.prev.potential);
        }
      }
      
      for (torsion = mol->beginTorsion(torsionIter); torsion != NULL; 
           torsion = mol->nextTorsion(torsionIter)) {
        RealType angle;
        torsion->calcForce(angle);
        RealType currTorsionPot = torsion->getPotential();
        torsionPotential += torsion->getPotential();
        std::map<Torsion*, TorsionDataSet>::iterator i = torsionDataSets.find(torsion);
        if (i == torsionDataSets.end()) {
          TorsionDataSet dataSet;
          dataSet.prev.angle = dataSet.curr.angle = angle;
          dataSet.prev.potential = dataSet.curr.potential = currTorsionPot;
          dataSet.deltaV = 0.0;
          torsionDataSets.insert(std::map<Torsion*, TorsionDataSet>::value_type(torsion, dataSet));
        }else {
          i->second.prev.angle = i->second.curr.angle;
          i->second.prev.potential = i->second.curr.potential;
          i->second.curr.angle = angle;
          i->second.curr.potential = currTorsionPot;
          i->second.deltaV =  fabs(i->second.curr.potential -  
                                   i->second.prev.potential);
        }      
      }      

      for (inversion = mol->beginInversion(inversionIter); 
           inversion != NULL; 
           inversion = mol->nextInversion(inversionIter)) {
        RealType angle;
        inversion->calcForce(angle);
        RealType currInversionPot = inversion->getPotential();
        inversionPotential += inversion->getPotential();
        std::map<Inversion*, InversionDataSet>::iterator i = inversionDataSets.find(inversion);
        if (i == inversionDataSets.end()) {
          InversionDataSet dataSet;
          dataSet.prev.angle = dataSet.curr.angle = angle;
          dataSet.prev.potential = dataSet.curr.potential = currInversionPot;
          dataSet.deltaV = 0.0;
          inversionDataSets.insert(std::map<Inversion*, InversionDataSet>::value_type(inversion, dataSet));
        }else {
          i->second.prev.angle = i->second.curr.angle;
          i->second.prev.potential = i->second.curr.potential;
          i->second.curr.angle = angle;
          i->second.curr.potential = currInversionPot;
          i->second.deltaV =  fabs(i->second.curr.potential -  
                                   i->second.prev.potential);
        }      
      }      
    }
    
    RealType  shortRangePotential = bondPotential + bendPotential + 
      torsionPotential +  inversionPotential;    
    Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
    curSnapshot->statData[Stats::SHORT_RANGE_POTENTIAL] = shortRangePotential;
    curSnapshot->statData[Stats::BOND_POTENTIAL] = bondPotential;
    curSnapshot->statData[Stats::BEND_POTENTIAL] = bendPotential;
    curSnapshot->statData[Stats::DIHEDRAL_POTENTIAL] = torsionPotential;
    curSnapshot->statData[Stats::INVERSION_POTENTIAL] = inversionPotential;
    
  }
  
  void ForceManager::calcLongRangeInteraction(bool needPotential, 
                                              bool needStress) {
    Snapshot* curSnapshot;
    DataStorage* config;
    RealType* frc;
    RealType* pos;
    RealType* trq;
    RealType* A;
    RealType* electroFrame;
    RealType* rc;
    RealType* particlePot;
    
    //get current snapshot from SimInfo
    curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
    
    //get array pointers
    config = &(curSnapshot->atomData);
    frc = config->getArrayPointer(DataStorage::dslForce);
    pos = config->getArrayPointer(DataStorage::dslPosition);
    trq = config->getArrayPointer(DataStorage::dslTorque);
    A   = config->getArrayPointer(DataStorage::dslAmat);
    electroFrame = config->getArrayPointer(DataStorage::dslElectroFrame);
    particlePot = config->getArrayPointer(DataStorage::dslParticlePot);

    //calculate the center of mass of cutoff group
    SimInfo::MoleculeIterator mi;
    Molecule* mol;
    Molecule::CutoffGroupIterator ci;
    CutoffGroup* cg;
    Vector3d com;
    std::vector<Vector3d> rcGroup;
    
    if(info_->getNCutoffGroups() > 0){
      
      for (mol = info_->beginMolecule(mi); mol != NULL; 
           mol = info_->nextMolecule(mi)) {
        for(cg = mol->beginCutoffGroup(ci); cg != NULL; 
            cg = mol->nextCutoffGroup(ci)) {
          cg->getCOM(com);
          rcGroup.push_back(com);
        }
      }// end for (mol)
       
      rc = rcGroup[0].getArrayPointer();
    } else {
      // center of mass of the group is the same as position of the atom  
      // if cutoff group does not exist
      rc = pos;
    }
    
    //initialize data before passing to fortran
    RealType longRangePotential[LR_POT_TYPES];
    RealType lrPot = 0.0;
    Vector3d totalDipole;
    short int passedCalcPot = needPotential;
    short int passedCalcStress = needStress;
    int isError = 0;

    for (int i=0; i<LR_POT_TYPES;i++){
      longRangePotential[i]=0.0; //Initialize array
    }
    
    doForceLoop(pos,
                rc,
                A,
                electroFrame,
                frc,
                trq,
                tau.getArrayPointer(),
                longRangePotential, 
                particlePot,
                &passedCalcPot,
                &passedCalcStress,
                &isError );
    
    if( isError ){
      sprintf( painCave.errMsg,
               "Error returned from the fortran force calculation.\n" );
      painCave.isFatal = 1;
      simError();
    }
    for (int i=0; i<LR_POT_TYPES;i++){
      lrPot += longRangePotential[i]; //Quick hack
    }
    
    // grab the simulation box dipole moment if specified
    if (info_->getCalcBoxDipole()){
      getAccumulatedBoxDipole(totalDipole.getArrayPointer());
      
      curSnapshot->statData[Stats::BOX_DIPOLE_X] = totalDipole(0);
      curSnapshot->statData[Stats::BOX_DIPOLE_Y] = totalDipole(1);
      curSnapshot->statData[Stats::BOX_DIPOLE_Z] = totalDipole(2);
    }
    
    //store the tau and long range potential    
    curSnapshot->statData[Stats::LONG_RANGE_POTENTIAL] = lrPot;
    curSnapshot->statData[Stats::VANDERWAALS_POTENTIAL] = longRangePotential[VDW_POT];
    curSnapshot->statData[Stats::ELECTROSTATIC_POTENTIAL] = longRangePotential[ELECTROSTATIC_POT];
  }

  
  void ForceManager::postCalculation(bool needStress) {
    SimInfo::MoleculeIterator mi;
    Molecule* mol;
    Molecule::RigidBodyIterator rbIter;
    RigidBody* rb;
    Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
    
    // collect the atomic forces onto rigid bodies
    
    for (mol = info_->beginMolecule(mi); mol != NULL; 
         mol = info_->nextMolecule(mi)) {
      for (rb = mol->beginRigidBody(rbIter); rb != NULL; 
           rb = mol->nextRigidBody(rbIter)) { 
        if (needStress) {          
          Mat3x3d rbTau = rb->calcForcesAndTorquesAndVirial();
          tau += rbTau;
        } else{
          rb->calcForcesAndTorques();
        }
      }
    }

    if (needStress) {
#ifdef IS_MPI
      Mat3x3d tmpTau(tau);
      MPI_Allreduce(tmpTau.getArrayPointer(), tau.getArrayPointer(), 
                    9, MPI_REALTYPE, MPI_SUM, MPI_COMM_WORLD);
#endif
      curSnapshot->statData.setTau(tau);
    } 
  }

} //end namespace OpenMD
Revision:	1448
Committed:	Thu Jun 17 14:58:49 2010 UTC (14 years, 10 months ago) by gezelter
Original Path:	*trunk/src/brains/ForceManager.cpp*
File size:	13033 byte(s)
Log Message:	mostly whitespace issues
#	User	Rev	Content
1	gezelter	507	/*
2	gezelter	246	* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
3			*
4			* The University of Notre Dame grants you ("Licensee") a
5			* non-exclusive, royalty free, license to use, modify and
6			* redistribute this software in source and binary code form, provided
7			* that the following conditions are met:
8			*
9	gezelter	1390	* 1. Redistributions of source code must retain the above copyright
10	gezelter	246	* notice, this list of conditions and the following disclaimer.
11			*
12	gezelter	1390	* 2. Redistributions in binary form must reproduce the above copyright
13	gezelter	246	* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the
15			* distribution.
16			*
17			* This software is provided "AS IS," without a warranty of any
18			* kind. All express or implied conditions, representations and
19			* warranties, including any implied warranty of merchantability,
20			* fitness for a particular purpose or non-infringement, are hereby
21			* excluded. The University of Notre Dame and its licensors shall not
22			* be liable for any damages suffered by licensee as a result of
23			* using, modifying or distributing the software or its
24			* derivatives. In no event will the University of Notre Dame or its
25			* licensors be liable for any lost revenue, profit or data, or for
26			* direct, indirect, special, consequential, incidental or punitive
27			* damages, however caused and regardless of the theory of liability,
28			* arising out of the use of or inability to use software, even if the
29			* University of Notre Dame has been advised of the possibility of
30			* such damages.
31	gezelter	1390	*
32			* SUPPORT OPEN SCIENCE! If you use OpenMD or its source code in your
33			* research, please cite the appropriate papers when you publish your
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).
38			* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).
39			* [4] Vardeman & Gezelter, in progress (2009).
40	gezelter	246	*/
41
42	gezelter	507	/**
43			* @file ForceManager.cpp
44			* @author tlin
45			* @date 11/09/2004
46			* @time 10:39am
47			* @version 1.0
48			*/
49	gezelter	246
50			#include "brains/ForceManager.hpp"
51			#include "primitives/Molecule.hpp"
52			#include "UseTheForce/doForces_interface.h"
53	gezelter	1390	#define __OPENMD_C
54	chuckv	664	#include "UseTheForce/DarkSide/fInteractionMap.h"
55	gezelter	246	#include "utils/simError.h"
56	xsun	1215	#include "primitives/Bond.hpp"
57	tim	749	#include "primitives/Bend.hpp"
58	cli2	1275	#include "primitives/Torsion.hpp"
59			#include "primitives/Inversion.hpp"
60	gezelter	1390	namespace OpenMD {
61	gezelter	246
62	gezelter	507	void ForceManager::calcForces(bool needPotential, bool needStress) {
63	gezelter	1126
64	gezelter	246	if (!info_->isFortranInitialized()) {
65	gezelter	507	info_->update();
66	gezelter	246	}
67	gezelter	1126
68	gezelter	246	preCalculation();
69
70			calcShortRangeInteraction();
71
72			calcLongRangeInteraction(needPotential, needStress);
73
74	gezelter	1126	postCalculation(needStress);
75	tim	749
76	gezelter	507	}
77	gezelter	1126
78	gezelter	507	void ForceManager::preCalculation() {
79	gezelter	246	SimInfo::MoleculeIterator mi;
80			Molecule* mol;
81			Molecule::AtomIterator ai;
82			Atom* atom;
83			Molecule::RigidBodyIterator rbIter;
84			RigidBody* rb;
85
86			// forces are zeroed here, before any are accumulated.
87			// NOTE: do not rezero the forces in Fortran.
88	chuckv	1245
89	gezelter	1126	for (mol = info_->beginMolecule(mi); mol != NULL;
90			mol = info_->nextMolecule(mi)) {
91	gezelter	507	for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
92			atom->zeroForcesAndTorques();
93			}
94	chuckv	1245
95	gezelter	507	//change the positions of atoms which belong to the rigidbodies
96	gezelter	1126	for (rb = mol->beginRigidBody(rbIter); rb != NULL;
97			rb = mol->nextRigidBody(rbIter)) {
98	gezelter	507	rb->zeroForcesAndTorques();
99			}
100	chuckv	1245
101	gezelter	246	}
102
103	gezelter	1126	// Zero out the stress tensor
104			tau *= 0.0;
105
106	gezelter	507	}
107	gezelter	1126
108	gezelter	507	void ForceManager::calcShortRangeInteraction() {
109	gezelter	246	Molecule* mol;
110			RigidBody* rb;
111			Bond* bond;
112			Bend* bend;
113			Torsion* torsion;
114	cli2	1275	Inversion* inversion;
115	gezelter	246	SimInfo::MoleculeIterator mi;
116			Molecule::RigidBodyIterator rbIter;
117			Molecule::BondIterator bondIter;;
118			Molecule::BendIterator bendIter;
119			Molecule::TorsionIterator torsionIter;
120	cli2	1275	Molecule::InversionIterator inversionIter;
121	tim	963	RealType bondPotential = 0.0;
122			RealType bendPotential = 0.0;
123			RealType torsionPotential = 0.0;
124	cli2	1275	RealType inversionPotential = 0.0;
125	gezelter	246
126			//calculate short range interactions
127	gezelter	1126	for (mol = info_->beginMolecule(mi); mol != NULL;
128			mol = info_->nextMolecule(mi)) {
129	gezelter	246
130	gezelter	507	//change the positions of atoms which belong to the rigidbodies
131	gezelter	1126	for (rb = mol->beginRigidBody(rbIter); rb != NULL;
132			rb = mol->nextRigidBody(rbIter)) {
133			rb->updateAtoms();
134	gezelter	507	}
135	gezelter	246
136	gezelter	1126	for (bond = mol->beginBond(bondIter); bond != NULL;
137			bond = mol->nextBond(bondIter)) {
138	tim	749	bond->calcForce();
139			bondPotential += bond->getPotential();
140	gezelter	507	}
141	gezelter	246
142	gezelter	1126	for (bend = mol->beginBend(bendIter); bend != NULL;
143			bend = mol->nextBend(bendIter)) {
144
145			RealType angle;
146			bend->calcForce(angle);
147			RealType currBendPot = bend->getPotential();
148	gezelter	1448
149	gezelter	1126	bendPotential += bend->getPotential();
150			std::map<Bend*, BendDataSet>::iterator i = bendDataSets.find(bend);
151			if (i == bendDataSets.end()) {
152			BendDataSet dataSet;
153			dataSet.prev.angle = dataSet.curr.angle = angle;
154			dataSet.prev.potential = dataSet.curr.potential = currBendPot;
155			dataSet.deltaV = 0.0;
156			bendDataSets.insert(std::map<Bend*, BendDataSet>::value_type(bend, dataSet));
157			}else {
158			i->second.prev.angle = i->second.curr.angle;
159			i->second.prev.potential = i->second.curr.potential;
160			i->second.curr.angle = angle;
161			i->second.curr.potential = currBendPot;
162			i->second.deltaV = fabs(i->second.curr.potential -
163			i->second.prev.potential);
164			}
165	gezelter	507	}
166	gezelter	1126
167			for (torsion = mol->beginTorsion(torsionIter); torsion != NULL;
168			torsion = mol->nextTorsion(torsionIter)) {
169	tim	963	RealType angle;
170	gezelter	1126	torsion->calcForce(angle);
171	tim	963	RealType currTorsionPot = torsion->getPotential();
172	gezelter	1126	torsionPotential += torsion->getPotential();
173			std::map<Torsion*, TorsionDataSet>::iterator i = torsionDataSets.find(torsion);
174			if (i == torsionDataSets.end()) {
175			TorsionDataSet dataSet;
176			dataSet.prev.angle = dataSet.curr.angle = angle;
177			dataSet.prev.potential = dataSet.curr.potential = currTorsionPot;
178			dataSet.deltaV = 0.0;
179			torsionDataSets.insert(std::map<Torsion*, TorsionDataSet>::value_type(torsion, dataSet));
180			}else {
181			i->second.prev.angle = i->second.curr.angle;
182			i->second.prev.potential = i->second.curr.potential;
183			i->second.curr.angle = angle;
184			i->second.curr.potential = currTorsionPot;
185			i->second.deltaV = fabs(i->second.curr.potential -
186			i->second.prev.potential);
187			}
188			}
189	cli2	1275
190			for (inversion = mol->beginInversion(inversionIter);
191			inversion != NULL;
192			inversion = mol->nextInversion(inversionIter)) {
193			RealType angle;
194			inversion->calcForce(angle);
195			RealType currInversionPot = inversion->getPotential();
196			inversionPotential += inversion->getPotential();
197			std::map<Inversion*, InversionDataSet>::iterator i = inversionDataSets.find(inversion);
198			if (i == inversionDataSets.end()) {
199			InversionDataSet dataSet;
200			dataSet.prev.angle = dataSet.curr.angle = angle;
201			dataSet.prev.potential = dataSet.curr.potential = currInversionPot;
202			dataSet.deltaV = 0.0;
203			inversionDataSets.insert(std::map<Inversion*, InversionDataSet>::value_type(inversion, dataSet));
204			}else {
205			i->second.prev.angle = i->second.curr.angle;
206			i->second.prev.potential = i->second.curr.potential;
207			i->second.curr.angle = angle;
208			i->second.curr.potential = currInversionPot;
209			i->second.deltaV = fabs(i->second.curr.potential -
210			i->second.prev.potential);
211			}
212			}
213	gezelter	246	}
214
215	gezelter	1126	RealType shortRangePotential = bondPotential + bendPotential +
216	cli2	1275	torsionPotential + inversionPotential;
217	gezelter	246	Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
218			curSnapshot->statData[Stats::SHORT_RANGE_POTENTIAL] = shortRangePotential;
219	tim	665	curSnapshot->statData[Stats::BOND_POTENTIAL] = bondPotential;
220			curSnapshot->statData[Stats::BEND_POTENTIAL] = bendPotential;
221			curSnapshot->statData[Stats::DIHEDRAL_POTENTIAL] = torsionPotential;
222	cli2	1275	curSnapshot->statData[Stats::INVERSION_POTENTIAL] = inversionPotential;
223	tim	665
224	gezelter	507	}
225	gezelter	1126
226			void ForceManager::calcLongRangeInteraction(bool needPotential,
227			bool needStress) {
228	gezelter	246	Snapshot* curSnapshot;
229			DataStorage* config;
230	tim	963	RealType* frc;
231			RealType* pos;
232			RealType* trq;
233			RealType* A;
234			RealType* electroFrame;
235			RealType* rc;
236	chuckv	1245	RealType* particlePot;
237	gezelter	246
238			//get current snapshot from SimInfo
239			curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
240	gezelter	1126
241	gezelter	246	//get array pointers
242			config = &(curSnapshot->atomData);
243			frc = config->getArrayPointer(DataStorage::dslForce);
244			pos = config->getArrayPointer(DataStorage::dslPosition);
245			trq = config->getArrayPointer(DataStorage::dslTorque);
246			A = config->getArrayPointer(DataStorage::dslAmat);
247			electroFrame = config->getArrayPointer(DataStorage::dslElectroFrame);
248	chuckv	1245	particlePot = config->getArrayPointer(DataStorage::dslParticlePot);
249	gezelter	246
250			//calculate the center of mass of cutoff group
251			SimInfo::MoleculeIterator mi;
252			Molecule* mol;
253			Molecule::CutoffGroupIterator ci;
254			CutoffGroup* cg;
255			Vector3d com;
256			std::vector<Vector3d> rcGroup;
257	gezelter	1126
258	gezelter	246	if(info_->getNCutoffGroups() > 0){
259	gezelter	1126
260			for (mol = info_->beginMolecule(mi); mol != NULL;
261			mol = info_->nextMolecule(mi)) {
262			for(cg = mol->beginCutoffGroup(ci); cg != NULL;
263			cg = mol->nextCutoffGroup(ci)) {
264	gezelter	507	cg->getCOM(com);
265			rcGroup.push_back(com);
266	gezelter	246	}
267	gezelter	507	}// end for (mol)
268	gezelter	246
269	gezelter	507	rc = rcGroup[0].getArrayPointer();
270	gezelter	246	} else {
271	gezelter	1126	// center of mass of the group is the same as position of the atom
272			// if cutoff group does not exist
273	gezelter	507	rc = pos;
274	gezelter	246	}
275	gezelter	1126
276	gezelter	246	//initialize data before passing to fortran
277	tim	963	RealType longRangePotential[LR_POT_TYPES];
278			RealType lrPot = 0.0;
279	chrisfen	998	Vector3d totalDipole;
280	gezelter	246	short int passedCalcPot = needPotential;
281			short int passedCalcStress = needStress;
282			int isError = 0;
283
284	chuckv	664	for (int i=0; i<LR_POT_TYPES;i++){
285			longRangePotential[i]=0.0; //Initialize array
286			}
287	gezelter	1126
288	xsun	1215	doForceLoop(pos,
289			rc,
290			A,
291			electroFrame,
292			frc,
293			trq,
294			tau.getArrayPointer(),
295			longRangePotential,
296	chuckv	1245	particlePot,
297			&passedCalcPot,
298	xsun	1215	&passedCalcStress,
299			&isError );
300
301	gezelter	246	if( isError ){
302	gezelter	507	sprintf( painCave.errMsg,
303			"Error returned from the fortran force calculation.\n" );
304			painCave.isFatal = 1;
305			simError();
306	gezelter	246	}
307	chuckv	664	for (int i=0; i<LR_POT_TYPES;i++){
308			lrPot += longRangePotential[i]; //Quick hack
309			}
310	gezelter	1126
311	chrisfen	998	// grab the simulation box dipole moment if specified
312			if (info_->getCalcBoxDipole()){
313			getAccumulatedBoxDipole(totalDipole.getArrayPointer());
314	gezelter	1126
315	chrisfen	998	curSnapshot->statData[Stats::BOX_DIPOLE_X] = totalDipole(0);
316			curSnapshot->statData[Stats::BOX_DIPOLE_Y] = totalDipole(1);
317			curSnapshot->statData[Stats::BOX_DIPOLE_Z] = totalDipole(2);
318			}
319	gezelter	1126
320	gezelter	246	//store the tau and long range potential
321	chuckv	664	curSnapshot->statData[Stats::LONG_RANGE_POTENTIAL] = lrPot;
322	chrisfen	691	curSnapshot->statData[Stats::VANDERWAALS_POTENTIAL] = longRangePotential[VDW_POT];
323	tim	681	curSnapshot->statData[Stats::ELECTROSTATIC_POTENTIAL] = longRangePotential[ELECTROSTATIC_POT];
324	gezelter	507	}
325	gezelter	246
326	gezelter	1126
327			void ForceManager::postCalculation(bool needStress) {
328	gezelter	246	SimInfo::MoleculeIterator mi;
329			Molecule* mol;
330			Molecule::RigidBodyIterator rbIter;
331			RigidBody* rb;
332	gezelter	1126	Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
333	gezelter	246
334			// collect the atomic forces onto rigid bodies
335	gezelter	1126
336			for (mol = info_->beginMolecule(mi); mol != NULL;
337			mol = info_->nextMolecule(mi)) {
338			for (rb = mol->beginRigidBody(rbIter); rb != NULL;
339			rb = mol->nextRigidBody(rbIter)) {
340			if (needStress) {
341			Mat3x3d rbTau = rb->calcForcesAndTorquesAndVirial();
342			tau += rbTau;
343			} else{
344			rb->calcForcesAndTorques();
345			}
346	gezelter	507	}
347	gezelter	1126	}
348	gezelter	246
349	gezelter	1126	if (needStress) {
350			#ifdef IS_MPI
351			Mat3x3d tmpTau(tau);
352			MPI_Allreduce(tmpTau.getArrayPointer(), tau.getArrayPointer(),
353			9, MPI_REALTYPE, MPI_SUM, MPI_COMM_WORLD);
354			#endif
355			curSnapshot->statData.setTau(tau);
356			}
357	gezelter	507	}
358	gezelter	246
359	gezelter	1390	} //end namespace OpenMD