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"
#define __OPENMD_C
#include "utils/simError.h"
#include "primitives/Bond.hpp"
#include "primitives/Bend.hpp"
#include "primitives/Torsion.hpp"
#include "primitives/Inversion.hpp"
#include "parallel/ForceMatrixDecomposition.hpp"
#include "nonbonded/NonBondedInteraction.hpp"

using namespace std;
namespace OpenMD {
  
  ForceManager::ForceManager(SimInfo * info) : info_(info) {

#ifdef IS_MPI
    fDecomp_ = new ForceMatrixDecomposition(info_);
#else
    // fDecomp_ = new ForceSerialDecomposition(info);
#endif
  }
  
  void ForceManager::calcForces() {
    
    if (!info_->isFortranInitialized()) {
      info_->update();
      interactionMan_->setSimInfo(info_);
      interactionMan_->initialize();
      swfun_ = interactionMan_->getSwitchingFunction();
      fDecomp_->distributeInitialData();
      info_->setupFortran();
    }
    
    preCalculation();   
    shortRangeInteractions();
    longRangeInteractions();
    postCalculation();
    
  }
  
  void ForceManager::preCalculation() {
    SimInfo::MoleculeIterator mi;
    Molecule* mol;
    Molecule::AtomIterator ai;
    Atom* atom;
    Molecule::RigidBodyIterator rbIter;
    RigidBody* rb;
    Molecule::CutoffGroupIterator ci;
    CutoffGroup* cg;
    
    // forces are zeroed here, before any are accumulated.
    
    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();
      }        

      if(info_->getNGlobalCutoffGroups() != info_->getNGlobalAtoms()){
        for(cg = mol->beginCutoffGroup(ci); cg != NULL; 
            cg = mol->nextCutoffGroup(ci)) {
          //calculate the center of mass of cutoff group
          cg->updateCOM();
        }
      }      
    }
   
    // Zero out the stress tensor
    tau *= 0.0;
    
  }
  
  void ForceManager::shortRangeInteractions() {
    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();
        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(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();
        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(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();
        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(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::longRangeInteractions() {

    // some of this initial stuff will go away:
    Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
    DataStorage* config = &(curSnapshot->atomData);
    DataStorage* cgConfig = &(curSnapshot->cgData);
    RealType* frc = config->getArrayPointer(DataStorage::dslForce);
    RealType* pos = config->getArrayPointer(DataStorage::dslPosition);
    RealType* trq = config->getArrayPointer(DataStorage::dslTorque);
    RealType* A = config->getArrayPointer(DataStorage::dslAmat);
    RealType* electroFrame = config->getArrayPointer(DataStorage::dslElectroFrame);
    RealType* particlePot = config->getArrayPointer(DataStorage::dslParticlePot);
    RealType* rc;    

    if(info_->getNGlobalCutoffGroups() != info_->getNGlobalAtoms()){
      rc = cgConfig->getArrayPointer(DataStorage::dslPosition);
    } 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[N_INTERACTION_FAMILIES];
    RealType lrPot = 0.0;
    int isError = 0;

    // dangerous to iterate over enums, but we'll live on the edge:
    for (int i = NO_FAMILY; i != N_INTERACTION_FAMILIES; ++i){
      longRangePotential[i]=0.0; //Initialize array
    }

    // new stuff starts here:

    fDecomp_->distributeData();
 
    int cg1, cg2, atom1, atom2;
    Vector3d d_grp, dag;
    RealType rgrpsq, rgrp;
    RealType vij;
    Vector3d fij, fg;
    pair<int, int> gtypes;
    RealType rCutSq;
    bool in_switching_region;
    RealType sw, dswdr, swderiv;
    vector<int> atomListColumn, atomListRow, atomListLocal;
    InteractionData idat;
    SelfData sdat;
    RealType mf;

    int loopStart, loopEnd;

    loopEnd = PAIR_LOOP;
    if (info_->requiresPrepair() ) {
      loopStart = PREPAIR_LOOP;
    } else {
      loopStart = PAIR_LOOP;
    }

    for (int iLoop = loopStart; iLoop < loopEnd; iLoop++) {
      
      if (iLoop == loopStart) {
        bool update_nlist = fDecomp_->checkNeighborList();
        if (update_nlist) 
          neighborList = fDecomp_->buildNeighborList();
      }

      for (vector<pair<int, int> >::iterator it = neighborList.begin(); 
             it != neighborList.end(); ++it) {
        
        cg1 = (*it).first;
        cg2 = (*it).second;

        gtypes = fDecomp_->getGroupTypes(cg1, cg2);
        d_grp  = fDecomp_->getIntergroupVector(cg1, cg2);
        curSnapshot->wrapVector(d_grp);        
        rgrpsq = d_grp.lengthSquare();
        rCutSq = groupCutoffMap[gtypes].first;

        if (rgrpsq < rCutSq) {
          idat.rcut = groupCutoffMap[gtypes].second;
          if (iLoop == PAIR_LOOP) {
            vij *= 0.0;
            fij = V3Zero;
          }
          
          in_switching_region = swfun_->getSwitch(rgrpsq, idat.sw, dswdr, rgrp);               
          atomListRow = fDecomp_->getAtomsInGroupRow(cg1);
          atomListColumn = fDecomp_->getAtomsInGroupColumn(cg2);

          for (vector<int>::iterator ia = atomListRow.begin(); 
               ia != atomListRow.end(); ++ia) {            
            atom1 = (*ia);
            
            for (vector<int>::iterator jb = atomListColumn.begin(); 
                 jb != atomListColumn.end(); ++jb) {              
              atom2 = (*jb);
              
              if (!fDecomp_->skipAtomPair(atom1, atom2)) {
                
                idat = fDecomp_->fillInteractionData(atom1, atom2);

                if (atomListRow.size() == 1 && atomListColumn.size() == 1) {
                  idat.d = d_grp;
                  idat.r2 = rgrpsq;
                } else {
                  idat.d = fDecomp_->getInteratomicVector(atom1, atom2);
                  curSnapshot->wrapVector(idat.d);
                  idat.r2 = idat.d.lengthSquare();
                }
                
                idat.rij = sqrt(idat.r2);
               
                if (iLoop == PREPAIR_LOOP) {
                  interactionMan_->doPrePair(idat);
                } else {
                  interactionMan_->doPair(idat);
                  vij += idat.vpair;
                  fij += idat.f1;
                  tau -= outProduct(idat.d, idat.f1);
                }
              }
            }
          }

          if (iLoop == PAIR_LOOP) {
            if (in_switching_region) {
              swderiv = vij * dswdr / rgrp;
              fg = swderiv * d_grp;

              fij += fg;

              if (atomListRow.size() == 1 && atomListColumn.size() == 1) {
                tau -= outProduct(idat.d, fg);
              }
          
              for (vector<int>::iterator ia = atomListRow.begin(); 
                   ia != atomListRow.end(); ++ia) {            
                atom1 = (*ia);                
                mf = fDecomp_->getMfactRow(atom1);
                // fg is the force on atom ia due to cutoff group's
                // presence in switching region
                fg = swderiv * d_grp * mf;
                fDecomp_->addForceToAtomRow(atom1, fg);

                if (atomListRow.size() > 1) {
                  if (info_->usesAtomicVirial()) {
                    // find the distance between the atom
                    // and the center of the cutoff group:
                    dag = fDecomp_->getAtomToGroupVectorRow(atom1, cg1);
                    tau -= outProduct(dag, fg);
                  }
                }
              }
              for (vector<int>::iterator jb = atomListColumn.begin(); 
                   jb != atomListColumn.end(); ++jb) {              
                atom2 = (*jb);
                mf = fDecomp_->getMfactColumn(atom2);
                // fg is the force on atom jb due to cutoff group's
                // presence in switching region
                fg = -swderiv * d_grp * mf;
                fDecomp_->addForceToAtomColumn(atom2, fg);

                if (atomListColumn.size() > 1) {
                  if (info_->usesAtomicVirial()) {
                    // find the distance between the atom
                    // and the center of the cutoff group:
                    dag = fDecomp_->getAtomToGroupVectorColumn(atom2, cg2);
                    tau -= outProduct(dag, fg);
                  }
                }
              }
            }
            //if (!SIM_uses_AtomicVirial) {
            //  tau -= outProduct(d_grp, fij);
            //}
          }
        }
      }

      if (iLoop == PREPAIR_LOOP) {
        if (info_->requiresPrepair()) {            
          fDecomp_->collectIntermediateData();
          atomListLocal = fDecomp_->getAtomList();
          for (vector<int>::iterator ia = atomListLocal.begin(); 
               ia != atomListLocal.end(); ++ia) {              
            atom1 = (*ia);            
            sdat = fDecomp_->fillSelfData(atom1);
            interactionMan_->doPreForce(sdat);
          }
          fDecomp_->distributeIntermediateData();        
        }
      }

    }
    
    fDecomp_->collectData();
    
    if (info_->requiresSkipCorrection() || info_->requiresSelfCorrection()) {
      atomListLocal = fDecomp_->getAtomList();
      for (vector<int>::iterator ia = atomListLocal.begin(); 
           ia != atomListLocal.end(); ++ia) {              
        atom1 = (*ia);     

        if (info_->requiresSkipCorrection()) {
          vector<int> skipList = fDecomp_->getSkipsForAtom(atom1);
          for (vector<int>::iterator jb = skipList.begin(); 
               jb != skipList.end(); ++jb) {              
            atom2 = (*jb);
            idat = fDecomp_->fillSkipData(atom1, atom2);
            interactionMan_->doSkipCorrection(idat);
          }
        }
          
        if (info_->requiresSelfCorrection()) {
          sdat = fDecomp_->fillSelfData(atom1);
          interactionMan_->doSelfCorrection(sdat);
        }
      }
    }

    // dangerous to iterate over enums, but we'll live on the edge:
    for (int i = NO_FAMILY; i != N_INTERACTION_FAMILIES; ++i){
      lrPot += longRangePotential[i]; //Quick hack
    }
        
    //store the tau and long range potential    
    curSnapshot->statData[Stats::LONG_RANGE_POTENTIAL] = lrPot;
    curSnapshot->statData[Stats::VANDERWAALS_POTENTIAL] = longRangePotential[VANDERWAALS_FAMILY];
    curSnapshot->statData[Stats::ELECTROSTATIC_POTENTIAL] = longRangePotential[ELECTROSTATIC_FAMILY];
  }

  
  void ForceManager::postCalculation() {
    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)) { 
        Mat3x3d rbTau = rb->calcForcesAndTorquesAndVirial();
        tau += rbTau;
      }
    }
    
#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:	1550
Committed:	Wed Apr 27 21:49:59 2011 UTC (14 years ago) by gezelter
File size:	18663 byte(s)
Log Message:	more fortran removal
#	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	gezelter	1390	#define __OPENMD_C
53	gezelter	246	#include "utils/simError.h"
54	xsun	1215	#include "primitives/Bond.hpp"
55	tim	749	#include "primitives/Bend.hpp"
56	cli2	1275	#include "primitives/Torsion.hpp"
57			#include "primitives/Inversion.hpp"
58	gezelter	1549	#include "parallel/ForceMatrixDecomposition.hpp"
59	gezelter	1550	#include "nonbonded/NonBondedInteraction.hpp"
60	gezelter	1467
61	gezelter	1545	using namespace std;
62	gezelter	1390	namespace OpenMD {
63	gezelter	1469
64	gezelter	1545	ForceManager::ForceManager(SimInfo * info) : info_(info) {
65
66	gezelter	1544	#ifdef IS_MPI
67	gezelter	1549	fDecomp_ = new ForceMatrixDecomposition(info_);
68	gezelter	1544	#else
69	gezelter	1549	// fDecomp_ = new ForceSerialDecomposition(info);
70	gezelter	1544	#endif
71	gezelter	1469	}
72	gezelter	1545
73	gezelter	1464	void ForceManager::calcForces() {
74	gezelter	1126
75	gezelter	246	if (!info_->isFortranInitialized()) {
76	gezelter	507	info_->update();
77	gezelter	1546	interactionMan_->setSimInfo(info_);
78			interactionMan_->initialize();
79			swfun_ = interactionMan_->getSwitchingFunction();
80	gezelter	1549	fDecomp_->distributeInitialData();
81	gezelter	1535	info_->setupFortran();
82	gezelter	246	}
83	gezelter	1126
84	gezelter	1544	preCalculation();
85	gezelter	1546	shortRangeInteractions();
86			longRangeInteractions();
87	gezelter	1464	postCalculation();
88	tim	749
89	gezelter	507	}
90	gezelter	1126
91	gezelter	507	void ForceManager::preCalculation() {
92	gezelter	246	SimInfo::MoleculeIterator mi;
93			Molecule* mol;
94			Molecule::AtomIterator ai;
95			Atom* atom;
96			Molecule::RigidBodyIterator rbIter;
97			RigidBody* rb;
98	gezelter	1540	Molecule::CutoffGroupIterator ci;
99			CutoffGroup* cg;
100	gezelter	246
101			// forces are zeroed here, before any are accumulated.
102	chuckv	1245
103	gezelter	1126	for (mol = info_->beginMolecule(mi); mol != NULL;
104			mol = info_->nextMolecule(mi)) {
105	gezelter	507	for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
106			atom->zeroForcesAndTorques();
107			}
108	chuckv	1245
109	gezelter	507	//change the positions of atoms which belong to the rigidbodies
110	gezelter	1126	for (rb = mol->beginRigidBody(rbIter); rb != NULL;
111			rb = mol->nextRigidBody(rbIter)) {
112	gezelter	507	rb->zeroForcesAndTorques();
113			}
114	gezelter	1540
115			if(info_->getNGlobalCutoffGroups() != info_->getNGlobalAtoms()){
116			for(cg = mol->beginCutoffGroup(ci); cg != NULL;
117			cg = mol->nextCutoffGroup(ci)) {
118			//calculate the center of mass of cutoff group
119			cg->updateCOM();
120			}
121			}
122	gezelter	246	}
123	gezelter	1540
124	gezelter	1126	// Zero out the stress tensor
125			tau *= 0.0;
126
127	gezelter	507	}
128	gezelter	1126
129	gezelter	1546	void ForceManager::shortRangeInteractions() {
130	gezelter	246	Molecule* mol;
131			RigidBody* rb;
132			Bond* bond;
133			Bend* bend;
134			Torsion* torsion;
135	cli2	1275	Inversion* inversion;
136	gezelter	246	SimInfo::MoleculeIterator mi;
137			Molecule::RigidBodyIterator rbIter;
138			Molecule::BondIterator bondIter;;
139			Molecule::BendIterator bendIter;
140			Molecule::TorsionIterator torsionIter;
141	cli2	1275	Molecule::InversionIterator inversionIter;
142	tim	963	RealType bondPotential = 0.0;
143			RealType bendPotential = 0.0;
144			RealType torsionPotential = 0.0;
145	cli2	1275	RealType inversionPotential = 0.0;
146	gezelter	246
147			//calculate short range interactions
148	gezelter	1126	for (mol = info_->beginMolecule(mi); mol != NULL;
149			mol = info_->nextMolecule(mi)) {
150	gezelter	246
151	gezelter	507	//change the positions of atoms which belong to the rigidbodies
152	gezelter	1126	for (rb = mol->beginRigidBody(rbIter); rb != NULL;
153			rb = mol->nextRigidBody(rbIter)) {
154			rb->updateAtoms();
155	gezelter	507	}
156	gezelter	246
157	gezelter	1126	for (bond = mol->beginBond(bondIter); bond != NULL;
158			bond = mol->nextBond(bondIter)) {
159	tim	749	bond->calcForce();
160			bondPotential += bond->getPotential();
161	gezelter	507	}
162	gezelter	246
163	gezelter	1126	for (bend = mol->beginBend(bendIter); bend != NULL;
164			bend = mol->nextBend(bendIter)) {
165
166			RealType angle;
167			bend->calcForce(angle);
168			RealType currBendPot = bend->getPotential();
169	gezelter	1448
170	gezelter	1126	bendPotential += bend->getPotential();
171	gezelter	1545	map<Bend*, BendDataSet>::iterator i = bendDataSets.find(bend);
172	gezelter	1126	if (i == bendDataSets.end()) {
173			BendDataSet dataSet;
174			dataSet.prev.angle = dataSet.curr.angle = angle;
175			dataSet.prev.potential = dataSet.curr.potential = currBendPot;
176			dataSet.deltaV = 0.0;
177	gezelter	1545	bendDataSets.insert(map<Bend*, BendDataSet>::value_type(bend, dataSet));
178	gezelter	1126	}else {
179			i->second.prev.angle = i->second.curr.angle;
180			i->second.prev.potential = i->second.curr.potential;
181			i->second.curr.angle = angle;
182			i->second.curr.potential = currBendPot;
183			i->second.deltaV = fabs(i->second.curr.potential -
184			i->second.prev.potential);
185			}
186	gezelter	507	}
187	gezelter	1126
188			for (torsion = mol->beginTorsion(torsionIter); torsion != NULL;
189			torsion = mol->nextTorsion(torsionIter)) {
190	tim	963	RealType angle;
191	gezelter	1126	torsion->calcForce(angle);
192	tim	963	RealType currTorsionPot = torsion->getPotential();
193	gezelter	1126	torsionPotential += torsion->getPotential();
194	gezelter	1545	map<Torsion*, TorsionDataSet>::iterator i = torsionDataSets.find(torsion);
195	gezelter	1126	if (i == torsionDataSets.end()) {
196			TorsionDataSet dataSet;
197			dataSet.prev.angle = dataSet.curr.angle = angle;
198			dataSet.prev.potential = dataSet.curr.potential = currTorsionPot;
199			dataSet.deltaV = 0.0;
200	gezelter	1545	torsionDataSets.insert(map<Torsion*, TorsionDataSet>::value_type(torsion, dataSet));
201	gezelter	1126	}else {
202			i->second.prev.angle = i->second.curr.angle;
203			i->second.prev.potential = i->second.curr.potential;
204			i->second.curr.angle = angle;
205			i->second.curr.potential = currTorsionPot;
206			i->second.deltaV = fabs(i->second.curr.potential -
207			i->second.prev.potential);
208			}
209			}
210	gezelter	1545
211	cli2	1275	for (inversion = mol->beginInversion(inversionIter);
212			inversion != NULL;
213			inversion = mol->nextInversion(inversionIter)) {
214			RealType angle;
215			inversion->calcForce(angle);
216			RealType currInversionPot = inversion->getPotential();
217			inversionPotential += inversion->getPotential();
218	gezelter	1545	map<Inversion*, InversionDataSet>::iterator i = inversionDataSets.find(inversion);
219	cli2	1275	if (i == inversionDataSets.end()) {
220			InversionDataSet dataSet;
221			dataSet.prev.angle = dataSet.curr.angle = angle;
222			dataSet.prev.potential = dataSet.curr.potential = currInversionPot;
223			dataSet.deltaV = 0.0;
224	gezelter	1545	inversionDataSets.insert(map<Inversion*, InversionDataSet>::value_type(inversion, dataSet));
225	cli2	1275	}else {
226			i->second.prev.angle = i->second.curr.angle;
227			i->second.prev.potential = i->second.curr.potential;
228			i->second.curr.angle = angle;
229			i->second.curr.potential = currInversionPot;
230			i->second.deltaV = fabs(i->second.curr.potential -
231			i->second.prev.potential);
232			}
233			}
234	gezelter	246	}
235
236	gezelter	1126	RealType shortRangePotential = bondPotential + bendPotential +
237	cli2	1275	torsionPotential + inversionPotential;
238	gezelter	246	Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
239			curSnapshot->statData[Stats::SHORT_RANGE_POTENTIAL] = shortRangePotential;
240	tim	665	curSnapshot->statData[Stats::BOND_POTENTIAL] = bondPotential;
241			curSnapshot->statData[Stats::BEND_POTENTIAL] = bendPotential;
242			curSnapshot->statData[Stats::DIHEDRAL_POTENTIAL] = torsionPotential;
243	gezelter	1545	curSnapshot->statData[Stats::INVERSION_POTENTIAL] = inversionPotential;
244	gezelter	507	}
245	gezelter	1126
246	gezelter	1546	void ForceManager::longRangeInteractions() {
247	gezelter	246
248	gezelter	1545	// some of this initial stuff will go away:
249			Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
250			DataStorage* config = &(curSnapshot->atomData);
251			DataStorage* cgConfig = &(curSnapshot->cgData);
252			RealType* frc = config->getArrayPointer(DataStorage::dslForce);
253			RealType* pos = config->getArrayPointer(DataStorage::dslPosition);
254			RealType* trq = config->getArrayPointer(DataStorage::dslTorque);
255			RealType* A = config->getArrayPointer(DataStorage::dslAmat);
256			RealType* electroFrame = config->getArrayPointer(DataStorage::dslElectroFrame);
257			RealType* particlePot = config->getArrayPointer(DataStorage::dslParticlePot);
258			RealType* rc;
259
260	gezelter	1540	if(info_->getNGlobalCutoffGroups() != info_->getNGlobalAtoms()){
261			rc = cgConfig->getArrayPointer(DataStorage::dslPosition);
262	gezelter	246	} else {
263	gezelter	1126	// center of mass of the group is the same as position of the atom
264			// if cutoff group does not exist
265	gezelter	507	rc = pos;
266	gezelter	246	}
267	gezelter	1126
268	gezelter	246	//initialize data before passing to fortran
269	gezelter	1550	RealType longRangePotential[N_INTERACTION_FAMILIES];
270	tim	963	RealType lrPot = 0.0;
271	gezelter	246	int isError = 0;
272
273	gezelter	1550	// dangerous to iterate over enums, but we'll live on the edge:
274			for (int i = NO_FAMILY; i != N_INTERACTION_FAMILIES; ++i){
275	chuckv	664	longRangePotential[i]=0.0; //Initialize array
276			}
277	gezelter	1545
278			// new stuff starts here:
279
280	gezelter	1549	fDecomp_->distributeData();
281	gezelter	1545
282	gezelter	1546	int cg1, cg2, atom1, atom2;
283			Vector3d d_grp, dag;
284	gezelter	1545	RealType rgrpsq, rgrp;
285	gezelter	1549	RealType vij;
286	gezelter	1545	Vector3d fij, fg;
287			pair<int, int> gtypes;
288			RealType rCutSq;
289			bool in_switching_region;
290			RealType sw, dswdr, swderiv;
291	gezelter	1549	vector<int> atomListColumn, atomListRow, atomListLocal;
292	gezelter	1545	InteractionData idat;
293	gezelter	1546	SelfData sdat;
294			RealType mf;
295	gezelter	1544
296	gezelter	1545	int loopStart, loopEnd;
297	gezelter	1544
298	gezelter	1545	loopEnd = PAIR_LOOP;
299	gezelter	1546	if (info_->requiresPrepair() ) {
300	gezelter	1545	loopStart = PREPAIR_LOOP;
301			} else {
302			loopStart = PAIR_LOOP;
303			}
304
305			for (int iLoop = loopStart; iLoop < loopEnd; iLoop++) {
306
307			if (iLoop == loopStart) {
308	gezelter	1549	bool update_nlist = fDecomp_->checkNeighborList();
309	gezelter	1545	if (update_nlist)
310	gezelter	1549	neighborList = fDecomp_->buildNeighborList();
311	gezelter	1544	}
312	gezelter	1545
313			for (vector<pair<int, int> >::iterator it = neighborList.begin();
314			it != neighborList.end(); ++it) {
315
316			cg1 = (*it).first;
317			cg2 = (*it).second;
318
319	gezelter	1549	gtypes = fDecomp_->getGroupTypes(cg1, cg2);
320			d_grp = fDecomp_->getIntergroupVector(cg1, cg2);
321	gezelter	1545	curSnapshot->wrapVector(d_grp);
322			rgrpsq = d_grp.lengthSquare();
323	gezelter	1546	rCutSq = groupCutoffMap[gtypes].first;
324	gezelter	1545
325			if (rgrpsq < rCutSq) {
326	gezelter	1546	idat.rcut = groupCutoffMap[gtypes].second;
327	gezelter	1545	if (iLoop == PAIR_LOOP) {
328	gezelter	1546	vij *= 0.0;
329	gezelter	1545	fij = V3Zero;
330			}
331
332	gezelter	1546	in_switching_region = swfun_->getSwitch(rgrpsq, idat.sw, dswdr, rgrp);
333	gezelter	1549	atomListRow = fDecomp_->getAtomsInGroupRow(cg1);
334			atomListColumn = fDecomp_->getAtomsInGroupColumn(cg2);
335	gezelter	1545
336	gezelter	1549	for (vector<int>::iterator ia = atomListRow.begin();
337			ia != atomListRow.end(); ++ia) {
338	gezelter	1545	atom1 = (*ia);
339
340	gezelter	1549	for (vector<int>::iterator jb = atomListColumn.begin();
341			jb != atomListColumn.end(); ++jb) {
342	gezelter	1545	atom2 = (*jb);
343
344	gezelter	1549	if (!fDecomp_->skipAtomPair(atom1, atom2)) {
345	gezelter	1545
346	gezelter	1549	idat = fDecomp_->fillInteractionData(atom1, atom2);
347	gezelter	1546
348	gezelter	1549	if (atomListRow.size() == 1 && atomListColumn.size() == 1) {
349	gezelter	1545	idat.d = d_grp;
350			idat.r2 = rgrpsq;
351			} else {
352	gezelter	1549	idat.d = fDecomp_->getInteratomicVector(atom1, atom2);
353	gezelter	1545	curSnapshot->wrapVector(idat.d);
354			idat.r2 = idat.d.lengthSquare();
355			}
356
357	gezelter	1546	idat.rij = sqrt(idat.r2);
358
359	gezelter	1545	if (iLoop == PREPAIR_LOOP) {
360			interactionMan_->doPrePair(idat);
361			} else {
362			interactionMan_->doPair(idat);
363			vij += idat.vpair;
364			fij += idat.f1;
365	gezelter	1546	tau -= outProduct(idat.d, idat.f1);
366	gezelter	1545	}
367			}
368			}
369			}
370
371			if (iLoop == PAIR_LOOP) {
372			if (in_switching_region) {
373			swderiv = vij * dswdr / rgrp;
374			fg = swderiv * d_grp;
375
376			fij += fg;
377
378	gezelter	1549	if (atomListRow.size() == 1 && atomListColumn.size() == 1) {
379	gezelter	1545	tau -= outProduct(idat.d, fg);
380			}
381
382	gezelter	1549	for (vector<int>::iterator ia = atomListRow.begin();
383			ia != atomListRow.end(); ++ia) {
384	gezelter	1545	atom1 = (*ia);
385	gezelter	1549	mf = fDecomp_->getMfactRow(atom1);
386	gezelter	1545	// fg is the force on atom ia due to cutoff group's
387			// presence in switching region
388			fg = swderiv * d_grp * mf;
389	gezelter	1549	fDecomp_->addForceToAtomRow(atom1, fg);
390	gezelter	1545
391	gezelter	1549	if (atomListRow.size() > 1) {
392	gezelter	1546	if (info_->usesAtomicVirial()) {
393	gezelter	1545	// find the distance between the atom
394			// and the center of the cutoff group:
395	gezelter	1549	dag = fDecomp_->getAtomToGroupVectorRow(atom1, cg1);
396	gezelter	1545	tau -= outProduct(dag, fg);
397			}
398			}
399			}
400	gezelter	1549	for (vector<int>::iterator jb = atomListColumn.begin();
401			jb != atomListColumn.end(); ++jb) {
402	gezelter	1545	atom2 = (*jb);
403	gezelter	1549	mf = fDecomp_->getMfactColumn(atom2);
404	gezelter	1545	// fg is the force on atom jb due to cutoff group's
405			// presence in switching region
406			fg = -swderiv * d_grp * mf;
407	gezelter	1549	fDecomp_->addForceToAtomColumn(atom2, fg);
408	gezelter	1545
409	gezelter	1549	if (atomListColumn.size() > 1) {
410	gezelter	1546	if (info_->usesAtomicVirial()) {
411	gezelter	1545	// find the distance between the atom
412			// and the center of the cutoff group:
413	gezelter	1549	dag = fDecomp_->getAtomToGroupVectorColumn(atom2, cg2);
414	gezelter	1545	tau -= outProduct(dag, fg);
415			}
416			}
417			}
418			}
419			//if (!SIM_uses_AtomicVirial) {
420			// tau -= outProduct(d_grp, fij);
421			//}
422			}
423			}
424			}
425
426			if (iLoop == PREPAIR_LOOP) {
427	gezelter	1546	if (info_->requiresPrepair()) {
428	gezelter	1549	fDecomp_->collectIntermediateData();
429			atomListLocal = fDecomp_->getAtomList();
430			for (vector<int>::iterator ia = atomListLocal.begin();
431			ia != atomListLocal.end(); ++ia) {
432	gezelter	1545	atom1 = (*ia);
433	gezelter	1549	sdat = fDecomp_->fillSelfData(atom1);
434	gezelter	1545	interactionMan_->doPreForce(sdat);
435			}
436	gezelter	1549	fDecomp_->distributeIntermediateData();
437	gezelter	1545	}
438			}
439
440	gezelter	1544	}
441	gezelter	1545
442	gezelter	1549	fDecomp_->collectData();
443	gezelter	1545
444	gezelter	1546	if (info_->requiresSkipCorrection() \|\| info_->requiresSelfCorrection()) {
445	gezelter	1549	atomListLocal = fDecomp_->getAtomList();
446			for (vector<int>::iterator ia = atomListLocal.begin();
447			ia != atomListLocal.end(); ++ia) {
448	gezelter	1545	atom1 = (*ia);
449	gezelter	1544
450	gezelter	1546	if (info_->requiresSkipCorrection()) {
451	gezelter	1549	vector<int> skipList = fDecomp_->getSkipsForAtom(atom1);
452	gezelter	1545	for (vector<int>::iterator jb = skipList.begin();
453			jb != skipList.end(); ++jb) {
454			atom2 = (*jb);
455	gezelter	1549	idat = fDecomp_->fillSkipData(atom1, atom2);
456	gezelter	1545	interactionMan_->doSkipCorrection(idat);
457			}
458			}
459
460	gezelter	1546	if (info_->requiresSelfCorrection()) {
461	gezelter	1549	sdat = fDecomp_->fillSelfData(atom1);
462	gezelter	1545	interactionMan_->doSelfCorrection(sdat);
463	gezelter	1549	}
464	gezelter	1545	}
465	gezelter	246	}
466	gezelter	1545
467	gezelter	1550	// dangerous to iterate over enums, but we'll live on the edge:
468			for (int i = NO_FAMILY; i != N_INTERACTION_FAMILIES; ++i){
469	chuckv	664	lrPot += longRangePotential[i]; //Quick hack
470			}
471	gezelter	1503
472	gezelter	246	//store the tau and long range potential
473	chuckv	664	curSnapshot->statData[Stats::LONG_RANGE_POTENTIAL] = lrPot;
474	gezelter	1550	curSnapshot->statData[Stats::VANDERWAALS_POTENTIAL] = longRangePotential[VANDERWAALS_FAMILY];
475			curSnapshot->statData[Stats::ELECTROSTATIC_POTENTIAL] = longRangePotential[ELECTROSTATIC_FAMILY];
476	gezelter	507	}
477	gezelter	246
478	gezelter	1126
479	gezelter	1464	void ForceManager::postCalculation() {
480	gezelter	246	SimInfo::MoleculeIterator mi;
481			Molecule* mol;
482			Molecule::RigidBodyIterator rbIter;
483			RigidBody* rb;
484	gezelter	1126	Snapshot* curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
485	gezelter	246
486			// collect the atomic forces onto rigid bodies
487	gezelter	1126
488			for (mol = info_->beginMolecule(mi); mol != NULL;
489			mol = info_->nextMolecule(mi)) {
490			for (rb = mol->beginRigidBody(rbIter); rb != NULL;
491			rb = mol->nextRigidBody(rbIter)) {
492	gezelter	1464	Mat3x3d rbTau = rb->calcForcesAndTorquesAndVirial();
493			tau += rbTau;
494	gezelter	507	}
495	gezelter	1126	}
496	gezelter	1464
497	gezelter	1126	#ifdef IS_MPI
498	gezelter	1464	Mat3x3d tmpTau(tau);
499			MPI_Allreduce(tmpTau.getArrayPointer(), tau.getArrayPointer(),
500			9, MPI_REALTYPE, MPI_SUM, MPI_COMM_WORLD);
501	gezelter	1126	#endif
502	gezelter	1464	curSnapshot->statData.setTau(tau);
503	gezelter	507	}
504	gezelter	246
505	gezelter	1390	} //end namespace OpenMD