src/brains/ForceManager.cpp

/*
 * Copyright (C) 2000-2004  Object Oriented Parallel Simulation Engine (OOPSE) project
 * 
 * Contact: oopse@oopse.org
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 * All we ask is that proper credit is given for our work, which includes
 * - but is not limited to - adding the above copyright notice to the beginning
 * of your source code files, and to any copyright notice that you may distribute
 * with programs based on this work.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */
 
 /**
  * @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"
#include "utils/simError.h"
namespace oopse {

void ForceManager::calcForces(bool needPotential, bool needStress) {

    if (!info_->isFortranInitialized()) {
        info_->update();
    }

    preCalculation();
    
    calcShortRangeInteraction();

    calcLongRangeInteraction(needPotential, needStress);

    postCalculation();
        
}

void ForceManager::preCalculation() {
    SimInfo::MoleculeIterator mi;
    Molecule* mol;
    Molecule::AtomIterator ai;
    Atom* atom;

    // 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->zeroForces();
        }
    }
    
}

void ForceManager::calcShortRangeInteraction() {
    Molecule* mol;
    RigidBody* rb;
    Bond* bond;
    Bend* bend;
    Torsion* torsion;
    SimInfo::MoleculeIterator mi;
    Molecule::RigidBodyIterator rbIter;
    Molecule::BondIterator bondIter;;
    Molecule::BendIterator  bendIter;
    Molecule::TorsionIterator  torsionIter;

    //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();
        }

        for (bend = mol->beginBend(bendIter); bend != NULL; bend = mol->nextBend(bendIter)) {
            bend->calcForce();
        }

        for (torsion = mol->beginTorsion(torsionIter); torsion != NULL; torsion = mol->nextTorsion(torsionIter)) {
            torsion->calcForce();
        }

    }
    
}

void ForceManager::calcLongRangeInteraction(bool needPotential, bool needStress) {
    Snapshot* curSnapshot;
    DataStorage* config;
    double* frc;
    double* pos;
    double* trq;
    double* A;
    double* unitFrame;
    double* rc;
    
    //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);
    unitFrame = config->getArrayPointer(DataStorage::dslUnitFrame);

    //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
    double longRangePotential = 0.0;
    Mat3x3d tau;
    short int passedCalcPot = needPotential;
    short int passedCalcStress = needStress;
    int isError = 0;

    doForceLoop( pos,
            rc,
            A,
            unitFrame,
            frc,
            trq,
            tau.getArrayPointer(),
            &longRangePotential, 
            &passedCalcPot,
            &passedCalcStress,
            &isError );

    if( isError ){
        sprintf( painCave.errMsg,
             "Error returned from the fortran force calculation.\n" );
        painCave.isFatal = 1;
        simError();
    }

    //store the tau and long range potential    
    curSnapshot->statData[Stats::LONG_RANGE_POTENTIAL] = longRangePotential;
    curSnapshot->statData.setTau(tau);
}


void ForceManager::postCalculation() {
    SimInfo::MoleculeIterator mi;
    Molecule* mol;
    Molecule::RigidBodyIterator rbIter;
    RigidBody* rb;
    
    // 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)) {
            rb->calcForcesAndTorques();
        }
    }

}

} //end namespace oopse
Revision:	1805
Committed:	Tue Nov 30 20:50:47 2004 UTC (19 years, 9 months ago) by tim
File size:	6067 byte(s)
Log Message:	brains get built, io is next
#	User	Rev	Content
1	tim	1722	/*
2			* Copyright (C) 2000-2004 Object Oriented Parallel Simulation Engine (OOPSE) project
3			*
4			* Contact: oopse@oopse.org
5			*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public License
8			* as published by the Free Software Foundation; either version 2.1
9			* of the License, or (at your option) any later version.
10			* All we ask is that proper credit is given for our work, which includes
11			* - but is not limited to - adding the above copyright notice to the beginning
12			* of your source code files, and to any copyright notice that you may distribute
13			* with programs based on this work.
14			*
15			* This program is distributed in the hope that it will be useful,
16			* but WITHOUT ANY WARRANTY; without even the implied warranty of
17			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18			* GNU Lesser General Public License for more details.
19			*
20			* You should have received a copy of the GNU Lesser General Public License
21			* along with this program; if not, write to the Free Software
22			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23			*
24			*/
25
26			/**
27			* @file ForceManager.cpp
28			* @author tlin
29			* @date 11/09/2004
30			* @time 10:39am
31			* @version 1.0
32			*/
33
34			#include "brains/ForceManager.hpp"
35	tim	1804	#include "primitives/Molecule.hpp"
36			#include "UseTheForce/doForces_interface.h"
37			#include "utils/simError.h"
38	tim	1722	namespace oopse {
39
40			void ForceManager::calcForces(bool needPotential, bool needStress) {
41
42	tim	1738	if (!info_->isFortranInitialized()) {
43			info_->update();
44			}
45	tim	1722
46	tim	1738	preCalculation();
47
48			calcShortRangeInteraction();
49
50	tim	1804	calcLongRangeInteraction(needPotential, needStress);
51	tim	1738
52	tim	1804	postCalculation();
53	tim	1738
54			}
55
56			void ForceManager::preCalculation() {
57	tim	1804	SimInfo::MoleculeIterator mi;
58	tim	1722	Molecule* mol;
59	tim	1804	Molecule::AtomIterator ai;
60	tim	1722	Atom* atom;
61
62			// forces are zeroed here, before any are accumulated.
63			// NOTE: do not rezero the forces in Fortran.
64			for (mol = info_->beginMolecule(mi); mol != NULL; mol = info_->nextMolecule(mi)) {
65			for(atom = mol->beginAtom(ai); atom != NULL; atom = mol->nextAtom(ai)) {
66			atom->zeroForces();
67			}
68	tim	1738	}
69
70			}
71	tim	1722
72	tim	1738	void ForceManager::calcShortRangeInteraction() {
73			Molecule* mol;
74			RigidBody* rb;
75			Bond* bond;
76			Bend* bend;
77			Torsion* torsion;
78	tim	1804	SimInfo::MoleculeIterator mi;
79			Molecule::RigidBodyIterator rbIter;
80			Molecule::BondIterator bondIter;;
81			Molecule::BendIterator bendIter;
82			Molecule::TorsionIterator torsionIter;
83	tim	1738
84	tim	1722	//calculate short range interactions
85			for (mol = info_->beginMolecule(mi); mol != NULL; mol = info_->nextMolecule(mi)) {
86
87	tim	1738	//change the positions of atoms which belong to the rigidbodies
88			for (rb = mol->beginRigidBody(rbIter); rb != NULL; rb = mol->nextRigidBody(rbIter)) {
89			rb->updateAtoms();
90			}
91	tim	1722
92	tim	1738	for (bond = mol->beginBond(bondIter); bond != NULL; bond = mol->nextBond(bondIter)) {
93	tim	1804	bond->calcForce();
94	tim	1738	}
95
96			for (bend = mol->beginBend(bendIter); bend != NULL; bend = mol->nextBend(bendIter)) {
97	tim	1804	bend->calcForce();
98	tim	1738	}
99
100			for (torsion = mol->beginTorsion(torsionIter); torsion != NULL; torsion = mol->nextTorsion(torsionIter)) {
101	tim	1804	torsion->calcForce();
102	tim	1738	}
103
104			}
105
106			}
107
108			void ForceManager::calcLongRangeInteraction(bool needPotential, bool needStress) {
109			Snapshot* curSnapshot;
110			DataStorage* config;
111			double* frc;
112			double* pos;
113			double* trq;
114			double* A;
115	tim	1804	double* unitFrame;
116	tim	1738	double* rc;
117
118	tim	1722	//get current snapshot from SimInfo
119	tim	1804	curSnapshot = info_->getSnapshotManager()->getCurrentSnapshot();
120	tim	1722
121			//get array pointers
122			config = &(curSnapshot->atomData);
123			frc = config->getArrayPointer(DataStorage::dslForce);
124			pos = config->getArrayPointer(DataStorage::dslPosition);
125			trq = config->getArrayPointer(DataStorage::dslTorque);
126			A = config->getArrayPointer(DataStorage::dslAmat);
127	tim	1804	unitFrame = config->getArrayPointer(DataStorage::dslUnitFrame);
128	tim	1722
129			//calculate the center of mass of cutoff group
130	tim	1804	SimInfo::MoleculeIterator mi;
131	tim	1738	Molecule* mol;
132	tim	1804	Molecule::CutoffGroupIterator ci;
133	tim	1738	CutoffGroup* cg;
134			Vector3d com;
135			std::vector<Vector3d> rcGroup;
136
137	tim	1722	if(info_->getNCutoffGroups() > 0){
138
139			for (mol = info_->beginMolecule(mi); mol != NULL; mol = info_->nextMolecule(mi)) {
140			for(cg = mol->beginCutoffGroup(ci); cg != NULL; cg = mol->nextCutoffGroup(ci)) {
141	tim	1804	cg->getCOM(com);
142	tim	1722	rcGroup.push_back(com);
143			}
144			}// end for (mol)
145
146	tim	1804	rc = rcGroup[0].getArrayPointer();
147	tim	1738	} else {
148	tim	1722	// center of mass of the group is the same as position of the atom if cutoff group does not exist
149			rc = pos;
150			}
151
152			//initialize data before passing to fortran
153	tim	1738	double longRangePotential = 0.0;
154			Mat3x3d tau;
155			short int passedCalcPot = needPotential;
156			short int passedCalcStress = needStress;
157			int isError = 0;
158	tim	1722
159			doForceLoop( pos,
160			rc,
161			A,
162	tim	1804	unitFrame,
163	tim	1722	frc,
164			trq,
165	tim	1804	tau.getArrayPointer(),
166	tim	1722	&longRangePotential,
167			&passedCalcPot,
168			&passedCalcStress,
169			&isError );
170
171			if( isError ){
172			sprintf( painCave.errMsg,
173			"Error returned from the fortran force calculation.\n" );
174			painCave.isFatal = 1;
175			simError();
176			}
177
178			//store the tau and long range potential
179	tim	1804	curSnapshot->statData[Stats::LONG_RANGE_POTENTIAL] = longRangePotential;
180	tim	1805	curSnapshot->statData.setTau(tau);
181	tim	1738	}
182	tim	1722
183	tim	1738
184			void ForceManager::postCalculation() {
185	tim	1804	SimInfo::MoleculeIterator mi;
186	tim	1738	Molecule* mol;
187	tim	1804	Molecule::RigidBodyIterator rbIter;
188	tim	1738	RigidBody* rb;
189
190	tim	1722	// collect the atomic forces onto rigid bodies
191			for (mol = info_->beginMolecule(mi); mol != NULL; mol = info_->nextMolecule(mi)) {
192	tim	1738	for (rb = mol->beginRigidBody(rbIter); rb != NULL; rb = mol->nextRigidBody(rbIter)) {
193			rb->calcForcesAndTorques();
194			}
195	tim	1722	}
196
197			}
198
199			} //end namespace oopse