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#include <cstdlib> | 
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#include <iostream> | 
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using namespace std; | 
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#include <stdlib.h> | 
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#ifdef IS_MPI | 
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#include <mpi.h> | 
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#endif // is_mpi | 
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  //calc rCut and rList | 
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  entry_plug->rCut = 2.5 * bigSigma; | 
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  if(entry_plug->rCut > (entry_plug->box_x / 2.0))  | 
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    entry_plug->rCut = entry_plug->box_x / 2.0; | 
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  if(entry_plug->rCut > (entry_plug->box_y / 2.0))  | 
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    entry_plug->rCut = entry_plug->box_y / 2.0; | 
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  if(entry_plug->rCut > (entry_plug->box_z / 2.0))  | 
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    entry_plug->rCut = entry_plug->box_z / 2.0; | 
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  entry_plug->rList = entry_plug->rCut + 1.0; | 
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  entry_plug->setDefaultRcut( 2.5 * bigSigma );   | 
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} | 
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void ForceFields::doForces( int calcPot, int calcStress ){ | 
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  double* frc; | 
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  double* pos; | 
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  double* trq; | 
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  double* tau; | 
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  double* A; | 
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  double* u_l;; | 
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  DirectionalAtom* dAtom; | 
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  SimState* config; | 
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  double ut[3]; | 
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  //u_l = new double[entry_plug->n_atoms]; | 
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  short int passedCalcPot = (short int)calcPot; | 
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  short int passedCalcStress = (short int)calcStress; | 
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  // forces are zeroed here, before any are acumulated. | 
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  // forces are zeroed here, before any are accumulated. | 
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  // NOTE: do not rezero the forces in Fortran. | 
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  for(i=0; i<entry_plug->n_atoms; i++){ | 
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    entry_plug->atoms[i]->zeroForces(); | 
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//     if( entry_plug->atoms[i]->isDirectional() ){ | 
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//       dAtom = (DirectionalAtom *)entry_plug->atoms[i]; | 
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//       dAtom->getU(ut); | 
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//       if(dAtom->getIndex()== 1){ | 
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//      std::cerr << "atom 2's u_l = " << ut[0] << ", " << ut[1] | 
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//                << ", " << ut[2] << "\n"; | 
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//       } | 
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//     } | 
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    entry_plug->atoms[i]->zeroForces();     | 
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  } | 
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  for(i=0; i<entry_plug->n_mol; i++ ){ | 
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    entry_plug->molecules[i].calcForces(); | 
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  } | 
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  frc = Atom::getFrcArray(); | 
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  pos = Atom::getPosArray(); | 
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  trq = Atom::getTrqArray(); | 
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  A   = Atom::getAmatArray(); | 
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  u_l = Atom::getUlArray(); | 
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  tau = entry_plug->tau; | 
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  config = entry_plug->getConfiguration(); | 
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  frc = config->getFrcArray(); | 
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  pos = config->getPosArray(); | 
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  trq = config->getTrqArray(); | 
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  A   = config->getAmatArray(); | 
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  u_l = config->getUlArray(); | 
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  isError = 0; | 
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  entry_plug->lrPot = 0.0; | 
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  for (i=0; i<9; i++) { | 
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    entry_plug->tau[i] = 0.0; | 
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  } | 
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  std::cerr << "before\n" | 
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            << "  force[0] = " << frc[0] << "\n" | 
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            << "  pos[0]   = " << pos[0] << "\n" | 
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            << "  trq[0]   = " << trq[0] << "\n" | 
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            << "  A[0]     = " << A[0] << "\n" | 
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            << "  tau      = " << entry_plug->tau[0] << ", " << entry_plug->tau[1] << ", " << entry_plug->tau[2] << "\n" | 
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            << "             " << entry_plug->tau[3] << ", " << entry_plug->tau[4] << ", " << entry_plug->tau[5] << "\n" | 
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            << "             " << entry_plug->tau[6] << ", " << entry_plug->tau[7] << ", " << entry_plug->tau[8] << "\n\n";  | 
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  fortranForceLoop( pos, | 
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                    A, | 
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                    u_l, | 
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                    frc, | 
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                    trq, | 
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                    tau, | 
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                    entry_plug->tau, | 
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                    &(entry_plug->lrPot),  | 
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                    &passedCalcPot, | 
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                    &passedCalcStress, | 
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                    &isError ); | 
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  //  delete[] u_l; | 
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  std::cerr << "after\n" | 
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            << "  force[0] = " << frc[0] << "\n" | 
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            << "  pos[0]   = " << pos[0] << "\n" | 
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            << "  trq[0]   = " << trq[0] << "\n" | 
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            << "  A[0]     = " << A[0] << "\n" | 
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            << "  tau      = " << entry_plug->tau[0] << ", " << entry_plug->tau[1] << ", " << entry_plug->tau[2] << "\n" | 
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            << "             " << entry_plug->tau[3] << ", " << entry_plug->tau[4] << ", " << entry_plug->tau[5] << "\n" | 
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            << "             " << entry_plug->tau[6] << ", " << entry_plug->tau[7] << ", " << entry_plug->tau[8] << "\n\n"; | 
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  if( isError ){ | 
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    sprintf( painCave.errMsg, | 
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           "returned from the force calculation.\n" ); | 
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  MPIcheckPoint(); | 
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#endif // is_mpi | 
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} | 
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