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root/group/trunk/OOPSE/libmdtools/ForceFields.cpp
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Comparing trunk/OOPSE/libmdtools/ForceFields.cpp (file contents):
Revision 572 by mmeineke, Wed Jul 2 21:26:55 2003 UTC vs.
Revision 1157 by tim, Tue May 11 20:33:41 2004 UTC

# Line 3 | Line 3 | using namespace std;
3   using namespace std;
4  
5  
6 < #include <cstdlib>
6 > #include <stdlib.h>
7  
8   #ifdef IS_MPI
9   #include <mpi.h>
10   #endif // is_mpi
11  
12  
13 + #ifdef PROFILE
14 + #include "mdProfile.hpp"
15 + #endif
16 +
17   #include "simError.h"
18   #include "ForceFields.hpp"
19   #include "Atom.hpp"
# Line 26 | Line 30 | void ForceFields::calcRcut( void ){
30  
31    //calc rCut and rList
32  
33 <  entry_plug->rCut = 2.5 * bigSigma;
34 <  if(entry_plug->rCut > (entry_plug->boxLx / 2.0))
35 <    entry_plug->rCut = entry_plug->boxLx / 2.0;
36 <  if(entry_plug->rCut > (entry_plug->boxLy / 2.0))
37 <    entry_plug->rCut = entry_plug->boxLy / 2.0;
34 <  if(entry_plug->rCut > (entry_plug->boxLz / 2.0))
35 <    entry_plug->rCut = entry_plug->boxLz / 2.0;
33 >  entry_plug->setDefaultRcut( 2.5 * bigSigma );  
34 >    
35 > }
36 >
37 > void ForceFields::setRcut( double LJrcut ) {
38    
39 <  entry_plug->rList = entry_plug->rCut + 1.0;
39 > #ifdef IS_MPI
40 >  double tempBig = bigSigma;
41 >  MPI_Allreduce( &tempBig, &bigSigma, 1, MPI_DOUBLE, MPI_MAX,
42 >                 MPI_COMM_WORLD);
43 > #endif  //is_mpi
44    
45 +  if (LJrcut < 2.5 * bigSigma) {
46 +    sprintf( painCave.errMsg,
47 +             "Setting Lennard-Jones cutoff radius to %lf.\n"
48 +             "\tThis value is smaller than %lf, which is\n"
49 +             "\t2.5 * bigSigma, where bigSigma is the largest\n"
50 +             "\tvalue of sigma present in the simulation.\n"
51 +             "\tThis is potentially a problem since the LJ potential may\n"
52 +             "\tbe appreciable at this distance.  If you don't want the\n"
53 +             "\tsmaller cutoff, change the LJrcut variable.\n",
54 +             LJrcut, 2.5*bigSigma);
55 +    painCave.isFatal = 0;
56 +    simError();
57 +  } else {
58 +    sprintf( painCave.errMsg,
59 +             "Setting Lennard-Jones cutoff radius to %lf.\n"
60 +             "\tThis value is larger than %lf, which is\n"
61 +             "\t2.5 * bigSigma, where bigSigma is the largest\n"
62 +             "\tvalue of sigma present in the simulation. This should\n"
63 +             "\tnot be a problem, but could adversely effect performance.\n",
64 +             LJrcut, 2.5*bigSigma);
65 +    painCave.isFatal = 0;
66 +    simError();
67 +  }
68 +  
69 +  //calc rCut and rList
70 +  
71 +  entry_plug->setDefaultRcut( LJrcut );
72   }
73  
74   void ForceFields::doForces( int calcPot, int calcStress ){
75  
76 <  int i, isError;
76 >  int i, j, isError;
77    double* frc;
78    double* pos;
79    double* trq;
80    double* A;
81 <  double* u_l;;
82 <  DirectionalAtom* dAtom;
81 >  double* u_l;
82 >  double* rc;
83 >  double* massRatio;
84 >  SimState* config;
85  
86 +  Molecule* myMols;
87 +  Atom** myAtoms;
88 +  int numAtom;
89 +  int curIndex;
90 +  double mtot;
91 +  int numMol;
92 +  int numCutoffGroups;
93 +  CutoffGroup* myCutoffGroup;
94 +  vector<CutoffGroup*>::iterator iterCutoff;
95 +  Atom* cutoffAtom;
96 +  vector<Atom*>::iterator iterAtom;  
97 +  double com[3];
98 +  double tempPos[3];
99 +  int atomIndex;
100 +  
101    short int passedCalcPot = (short int)calcPot;
102    short int passedCalcStress = (short int)calcStress;
103  
# Line 58 | Line 108 | void ForceFields::doForces( int calcPot, int calcStres
108      entry_plug->atoms[i]->zeroForces();    
109    }
110  
111 + #ifdef PROFILE
112 +  startProfile(pro7);
113 + #endif
114 +  
115    for(i=0; i<entry_plug->n_mol; i++ ){
116 <    entry_plug->molecules[i].calcForces();
116 >    // CalcForces in molecules takes care of mapping rigid body coordinates
117 >    // into atomic coordinates
118 >    entry_plug->molecules[i].calcForces();    
119    }
120  
121 <  frc = Atom::getFrcArray();
122 <  pos = Atom::getPosArray();
123 <  trq = Atom::getTrqArray();
68 <  A   = Atom::getAmatArray();
69 <  u_l = Atom::getUlArray();
121 > #ifdef PROFILE
122 >  endProfile( pro7 );
123 > #endif
124  
125 +  config = entry_plug->getConfiguration();
126 +  
127 +  frc = config->getFrcArray();
128 +  pos = config->getPosArray();
129 +  trq = config->getTrqArray();
130 +  A   = config->getAmatArray();
131 +  u_l = config->getUlArray();
132 +
133 +  if(entry_plug->haveCutoffGroups){
134 +    //if
135 +    myMols = entry_plug->molecules;
136 +    numMol = entry_plug->n_mol;
137 +    for(int i  = 0; i < numMol; i++){
138 +      numAtom = myMols[i].getNAtoms();
139 +      myAtoms = myMols[i].getMyAtoms();
140 +
141 +      
142 +      for(int j = 0; j < numAtom; j++){
143 + #ifdef IS_MPI
144 +        atomIndex = myAtoms[j]->getGlobalIndex();
145 + #else
146 +        atomIndex = myAtoms[j]->getIndex();
147 + #endif
148 +
149 +        if(myMols[i].belongToCutoffGroup(atomIndex))
150 +          continue;
151 +        else{
152 +          myAtoms[j]->getPos(tempPos);
153 +          myAtoms[j]->setRc(tempPos);
154 +        }
155 +          
156 +      }
157 +        
158 +      numCutoffGroups = myMols[i].getNCutoffGroups();
159 +      for(myCutoffGroup =myMols[i].beginCutoffGroup(iterCutoff); myCutoffGroup != NULL;
160 +                                                    myCutoffGroup =myMols[i].nextCutoffGroup(iterCutoff)){
161 +        //get center of mass of the cutoff group
162 +        myCutoffGroup->getCOM(com);
163 +
164 +        for(cutoffAtom = myCutoffGroup->beginAtom(iterAtom); cutoffAtom != NULL;
165 +                                             cutoffAtom = myCutoffGroup->beginAtom(iterAtom)){
166 +          cutoffAtom->setRc(com);
167 +        }  
168 +                                
169 +      }// end for(myCutoffGroup)
170 +      
171 +    }//end for(int i = 0)
172 +
173 +    rc = config->getRcArray();
174 +  }
175 +  else{
176 +    // center of mass of the group is the same as position of the atom  if cutoff group does not exist
177 +    rc = pos;
178 +  }
179 +  
180 +
181 +
182    isError = 0;
183    entry_plug->lrPot = 0.0;
184  
# Line 75 | Line 186 | void ForceFields::doForces( int calcPot, int calcStres
186      entry_plug->tau[i] = 0.0;
187    }
188  
189 +
190 + #ifdef PROFILE
191 +  startProfile(pro8);
192 + #endif
193 +
194    fortranForceLoop( pos,
195 +                    rc,
196                      A,
197                      u_l,
198                      frc,
# Line 86 | Line 203 | void ForceFields::doForces( int calcPot, int calcStres
203                      &passedCalcStress,
204                      &isError );
205  
206 +
207 + #ifdef PROFILE
208 +  endProfile(pro8);
209 + #endif
210 +
211 +
212    if( isError ){
213      sprintf( painCave.errMsg,
214               "Error returned from the fortran force calculation.\n" );
# Line 93 | Line 216 | void ForceFields::doForces( int calcPot, int calcStres
216      simError();
217    }
218  
219 +  for(i=0; i<entry_plug->n_mol; i++ ){
220 +    entry_plug->molecules[i].atoms2rigidBodies();
221 +  }
222 +
223 +
224   #ifdef IS_MPI
225    sprintf( checkPointMsg,
226             "returned from the force calculation.\n" );
227    MPIcheckPoint();
228   #endif // is_mpi
229 +  
230  
231   }
232  

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