/// Initialized the main CoMD data stucture, SimFlat, based on command
/// line input from the user. Also performs certain sanity checks on
/// the input to screen out certain non-sensical inputs.
///
/// Simple data members such as the time step dt are initialized
/// directly, substructures such as the potential, the link cells, the
/// atoms, etc., are initialized by calling additional initialization
/// functions (initPotential(), initLinkCells(), initAtoms(), etc.).
/// Initialization order is set by the natural dependencies of the
/// substructure such as the atoms need the link cells so the link cells
/// must be initialized before the atoms.
SimFlat* initSimulation(Command cmd)
{
SimFlat* sim = comdMalloc(sizeof(SimFlat));
sim->nSteps = cmd.nSteps;
sim->printRate = cmd.printRate;
sim->dt = cmd.dt;
sim->domain = NULL;
sim->boxes = NULL;
sim->atoms = NULL;
sim->ePotential = 0.0;
sim->eKinetic = 0.0;
sim->atomExchange = NULL;
sim->pot = initPotential(cmd.doeam, cmd.potDir, cmd.potName, cmd.potType);
real_t latticeConstant = cmd.lat;
if (cmd.lat < 0.0)
latticeConstant = sim->pot->lat;
// ensure input parameters make sense.
sanityChecks(cmd, sim->pot->cutoff, latticeConstant, sim->pot->latticeType);
sim->species = initSpecies(sim->pot);
real3 globalExtent;
globalExtent[0] = cmd.nx * latticeConstant;
globalExtent[1] = cmd.ny * latticeConstant;
globalExtent[2] = cmd.nz * latticeConstant;
sim->domain = initDecomposition(
cmd.xproc, cmd.yproc, cmd.zproc, globalExtent);
sim->boxes = initLinkCells(sim->domain, sim->pot->cutoff);
sim->atoms = initAtoms(sim->boxes);
// create lattice with desired temperature and displacement.
createFccLattice(cmd.nx, cmd.ny, cmd.nz, latticeConstant, sim);
setTemperature(sim, cmd.temperature);
randomDisplacements(sim, cmd.initialDelta);
sim->atomExchange = initAtomHaloExchange(sim->domain, sim->boxes);
// Forces must be computed before we call the time stepper.
startTimer(redistributeTimer);
redistributeAtoms(sim);
stopTimer(redistributeTimer);
startTimer(computeForceTimer);
computeForce(sim);
stopTimer(computeForceTimer);
kineticEnergy(sim);
return sim;
}
SimFlat* initSimulation(Command cmd)
{
SimFlat* sim = comdMalloc(sizeof(SimFlat));
sim->nSteps = cmd.nSteps;
sim->printRate = cmd.printRate;
sim->dt = cmd.dt;
sim->domain = NULL;
sim->boxes = NULL;
sim->atoms = NULL;
sim->ePotential = 0.0;
sim->eKinetic = 0.0;
sim->atomExchange = NULL;
sim->pot = initPotential(cmd.doeam, cmd.potDir, cmd.potName, cmd.potType);
real_t latticeConstant = cmd.lat;
if (cmd.lat < 0.0)
latticeConstant = sim->pot->lat;
// ensure input parameters make sense.
sanityChecks(cmd, sim->pot->cutoff, latticeConstant, sim->pot->latticeType);
sim->species = initSpecies(sim->pot);
real3 globalExtent;
globalExtent[0] = cmd.nx * latticeConstant;
globalExtent[1] = cmd.ny * latticeConstant;
globalExtent[2] = cmd.nz * latticeConstant;
sim->domain = initDecomposition(cmd.xproc, cmd.yproc, cmd.zproc, globalExtent);
sim->boxes = initLinkCells(sim->domain, sim->pot->cutoff);
sim->atoms = initAtoms(sim->boxes);
sim->defInfo = initDeformation(sim, cmd.defGrad);
//printf("Got to here\n");
// create lattice with desired temperature and displacement.
createFccLattice(cmd.nx, cmd.ny, cmd.nz, latticeConstant, sim);
setTemperature(sim,0.0);
randomDisplacements(sim, cmd.initialDelta);
sim->atomExchange = initAtomHaloExchange(sim->domain, sim->boxes);
forwardDeformation(sim);
//eamForce(sim);
// Procedure for energy density passing from the macrosolver to CoMD
//setTemperature(sim,((cmd.energy*latticeVolume*cmd.nx*cmd.ny*cmd.nz-sim->ePotential)/sim->atoms->nGlobal)/(kB_eV * 1.5));
//randomDisplacements(sim, cmd.initialDelta);
// Forces must be computed before we call the time stepper.
startTimer(redistributeTimer);
redistributeAtoms(sim);
stopTimer(redistributeTimer);
startTimer(computeForceTimer);
computeForce(sim);
stopTimer(computeForceTimer);
double cohmmEnergy=cmd.energy*sim->defInfo->globalVolume;
double temperatureFromEnergyDensity=((cohmmEnergy-sim->ePotential)/sim->atoms->nGlobal)/(kB_eV*1.5);
setTemperature(sim,temperatureFromEnergyDensity); //uncomment to set temperature according to hmm energy density
//setTemperature(sim,cmd.temperature); //uncomment to directly input temperature
kineticEnergy(sim);
return sim;
}
