//record parameters. we will determine which ones need to be adjusted later
param_g *record_params(system_t *system) {
char last_atomtype[MAXLINE];
last_atomtype[0] = '\0'; //initialize last_atomtype
atom_t *atom_ptr;
param_g *rval = calloc(1, sizeof(param_g));
memnullcheck(rval, sizeof(param_g), __LINE__ - 1, __FILE__);
param_t *param_list = calloc(1, sizeof(param_t)); //return value
memnullcheck(param_list, sizeof(param_t), __LINE__ - 1, __FILE__);
param_t *param_ptr = param_list; //used to seek through param list
param_t *prev_param_ptr = 0;
rval->alpha = system->polar_damp;
rval->last_alpha = system->polar_damp;
for (atom_ptr = system->molecules->atoms; atom_ptr; atom_ptr = atom_ptr->next) {
if (strcasecmp(atom_ptr->atomtype, last_atomtype)) {
strcpy(param_ptr->atomtype, atom_ptr->atomtype);
param_ptr->charge = atom_ptr->charge;
param_ptr->epsilon = atom_ptr->epsilon;
param_ptr->sigma = atom_ptr->sigma;
param_ptr->omega = atom_ptr->omega;
param_ptr->pol = atom_ptr->polarizability;
param_ptr->c6 = atom_ptr->c6;
param_ptr->c8 = atom_ptr->c8;
param_ptr->c10 = atom_ptr->c10;
param_ptr->last_charge = param_ptr->charge;
param_ptr->last_epsilon = param_ptr->epsilon;
param_ptr->last_sigma = param_ptr->sigma;
param_ptr->last_omega = param_ptr->omega;
param_ptr->last_pol = param_ptr->pol;
param_ptr->last_c6 = param_ptr->c6;
param_ptr->last_c8 = param_ptr->c8;
param_ptr->last_c10 = param_ptr->c10;
param_ptr->next = calloc(1, sizeof(param_t));
memnullcheck(param_ptr->next, sizeof(param_t), __LINE__ - 1, __FILE__);
prev_param_ptr = param_ptr;
param_ptr = param_ptr->next;
strcpy(last_atomtype, atom_ptr->atomtype);
}
}
prev_param_ptr->next = NULL;
free(param_ptr);
//count ntypes
for (param_ptr = param_list; param_ptr; param_ptr = param_ptr->next) {
for (atom_ptr = system->molecules->atoms; atom_ptr; atom_ptr = atom_ptr->next)
if (!strcasecmp(param_ptr->atomtype, atom_ptr->atomtype))
++(param_ptr->ntypes);
}
rval->type_params = param_list;
return rval;
}
void free_my_pairs ( molecule_t * molecule ) {
int i = 0;
pair_t ** ptr_array = NULL;
atom_t * aptr;
pair_t * pptr;
//build an array of pairs
for ( aptr = molecule->atoms; aptr; aptr = aptr->next ) {
for ( pptr = aptr->pairs; pptr; pptr = pptr->next ) {
ptr_array = realloc(ptr_array, sizeof(pair_t *)*(i+1));
memnullcheck(ptr_array,sizeof(pair_t *)*(i+1),__LINE__-1, __FILE__);
ptr_array[i] = pptr;
++i;
}
}
//free the pairs
for (--i; i>=0; i--) free(ptr_array[i]);
//zero out the heads
for (aptr = molecule->atoms; aptr; aptr=aptr->next )
aptr->pairs = NULL;
//free the temp array
free(ptr_array);
return;
}
// free all pairs
void free_all_pairs(system_t * system) {
int i, j;
pair_t *pair_ptr;
pair_t **ptr_array = NULL;
j=0; //pair array index
//build an array of all pair pointers
for ( i=0; i< system->natoms ; i++ ) {
for ( pair_ptr = system->atom_array[i]->pairs; pair_ptr; pair_ptr = pair_ptr->next ) {
ptr_array = realloc(ptr_array, sizeof(pair_t *)*(j + 1));
memnullcheck(ptr_array,sizeof(pair_t *)*(j+1),__LINE__-1, __FILE__);
ptr_array[j] = pair_ptr;
j++;
}
}
/* free the whole array of ptrs */
while ( j-- ) free(ptr_array[j]);
/* zero out the heads */
for ( i=0; i< system->natoms; i++ )
system->atom_array[i]->pairs = NULL;
/* free our temporary array */
if(ptr_array) free(ptr_array);
}
void allocqmrotation(system_t *system, molecule_t *molecule_ptr) {
int i;
molecule_ptr->quantum_rotational_energies = calloc(system->quantum_rotation_level_max, sizeof(double));
memnullcheck(molecule_ptr->quantum_rotational_energies,
system->quantum_rotation_level_max * sizeof(double), __LINE__ - 1, __FILE__);
molecule_ptr->quantum_rotational_eigenvectors = calloc(system->quantum_rotation_level_max, sizeof(complex_t *));
memnullcheck(molecule_ptr->quantum_rotational_eigenvectors,
system->quantum_rotation_level_max * sizeof(complex_t *), __LINE__ - 1, __FILE__);
for (i = 0; i < system->quantum_rotation_level_max; i++) {
molecule_ptr->quantum_rotational_eigenvectors[i] =
calloc((system->quantum_rotation_l_max + 1) * (system->quantum_rotation_l_max + 1), sizeof(complex_t));
memnullcheck(molecule_ptr->quantum_rotational_eigenvectors[i],
(system->quantum_rotation_l_max + 1) * (system->quantum_rotation_l_max + 1) * sizeof(complex_t), __LINE__ - 1, __FILE__);
}
molecule_ptr->quantum_rotational_eigensymmetry = calloc(system->quantum_rotation_level_max, sizeof(int));
memnullcheck(molecule_ptr->quantum_rotational_eigensymmetry,
system->quantum_rotation_level_max * sizeof(int), __LINE__ - 1, __FILE__);
return;
}
void addSorbateToList( system_t * system, char *sorbate_type ){
// grow array
system->sorbateInfo = realloc(system->sorbateInfo, system->sorbateCount*sizeof(sorbateInfo_t));
memnullcheck(system->sorbateInfo, system->sorbateCount*sizeof(sorbateInfo_t), __LINE__-1, __FILE__);
// set sorbate type for the new element
strcpy( system->sorbateInfo[system->sorbateCount-1].id, sorbate_type );
// send a status update to stdout
char buffer[MAXLINE];
sprintf(buffer, "INPUT: System will track individual stats for sorbate %s.\n",
system->sorbateInfo[system->sorbateCount-1].id );
output( buffer );
return;
}
//free vdw pointer which keeps track of e_iso energies
void free_vdw_eiso(vdw_t * vdw_eiso_info) {
vdw_t * vp;
vdw_t ** varray = NULL;
int i=0;
for ( vp = vdw_eiso_info; vp; vp=vp->next ) {
varray = realloc(varray, sizeof(vdw_t *)*(i+1));
memnullcheck(varray,sizeof(vdw_t *)*(i+1), __LINE__-1, __FILE__);
varray[i]=vp;
i++;
}
while ( i>0 ) {
i--;
free(varray[i]);
}
free(varray);
return;
}
void free_my_atoms ( molecule_t * molecules ) {
int i = 0;
atom_t * aptr;
atom_t ** aarray = NULL;
//build an array of atoms
for ( aptr= molecules->atoms; aptr; aptr=aptr->next ) {
aarray = realloc(aarray, sizeof(atom_t *)*(i+1));
memnullcheck(aarray,sizeof(atom_t *)*(i+1), __LINE__-1, __FILE__);
aarray[i] = aptr;
i++;
}
//free the atoms
while ( i-- )
free(aarray[i]);
//free the temp array
free(aarray);
return;
}
// free all molecules
void free_all_molecules(system_t * system, molecule_t * molecules) {
int i;
molecule_t **marray = NULL;
molecule_t *mptr;
/* build the ptr array */ // we can't free all of system->molecule_array since it's redundant
for(mptr = molecules, i = 0; mptr; mptr = mptr->next) {
free_my_atoms(mptr);
marray = realloc(marray, sizeof(molecule_t *)*(i + 1));
memnullcheck(marray,sizeof(molecule_t *)*(i + 1),__LINE__-1, __FILE__);
marray[i] = mptr;
i++;
}
/* free the whole array of ptrs */
for(--i; i >= 0; i--) free(marray[i]);
/* free our temporary arrays */
free(marray);
return;
}
/* apply what was already determined in checkpointing */
void make_move(system_t *system) {
int i, j, k, p, q;
cavity_t *cavities_array;
int cavities_array_counter, random_index;
double com[3], rand[3];
molecule_t *molecule_ptr;
atom_t *atom_ptr;
pair_t *pair_ptr;
/* update the cavity grid prior to making a move */
if (system->cavity_bias) {
cavity_update_grid(system);
system->checkpoint->biased_move = 0;
}
switch (system->checkpoint->movetype) {
case MOVETYPE_INSERT: /* insert a molecule at a random pos and orientation */
/* umbrella sampling */
if (system->cavity_bias && system->cavities_open) {
/* doing a biased move - this flag lets mc.c know about it */
system->checkpoint->biased_move = 1;
/* make an array of possible insertion points */
cavities_array = calloc(system->cavities_open, sizeof(cavity_t));
memnullcheck(cavities_array, system->cavities_open * sizeof(cavity_t), __LINE__ - 1, __FILE__);
for (i = 0, cavities_array_counter = 0; i < system->cavity_grid_size; i++) {
for (j = 0; j < system->cavity_grid_size; j++) {
for (k = 0; k < system->cavity_grid_size; k++) {
if (!system->cavity_grid[i][j][k].occupancy) {
for (p = 0; p < 3; p++)
cavities_array[cavities_array_counter].pos[p] = system->cavity_grid[i][j][k].pos[p];
++cavities_array_counter;
}
} /* end k */
} /* end j */
} /* end i */
/* insert randomly at one of the free cavity points */
random_index = (system->cavities_open - 1) - (int)rint(((double)(system->cavities_open - 1)) * get_rand(system));
for (p = 0; p < 3; p++)
com[p] = cavities_array[random_index].pos[p];
/* free the insertion array */
free(cavities_array);
} // end umbrella
else {
/* insert the molecule to a random location within the unit cell */
for (p = 0; p < 3; p++)
rand[p] = 0.5 - get_rand(system);
for (p = 0; p < 3; p++)
for (q = 0, com[p] = 0; q < 3; q++)
com[p] += system->pbc->basis[q][p] * rand[q];
}
/* process the inserted molecule */
for (atom_ptr = system->checkpoint->molecule_backup->atoms; atom_ptr; atom_ptr = atom_ptr->next) {
/* move the molecule back to the origin and then assign it to com */
for (p = 0; p < 3; p++)
atom_ptr->pos[p] += com[p] - system->checkpoint->molecule_backup->com[p];
}
/* update the molecular com */
for (p = 0; p < 3; p++)
system->checkpoint->molecule_backup->com[p] = com[p];
/* give it a random orientation */
rotate(system, system->checkpoint->molecule_backup, system->pbc, 1.0);
// insert into the list
if (system->num_insertion_molecules) {
// If inserting a molecule from an insertion list, we will always insert at the end
system->checkpoint->head->next = system->checkpoint->molecule_backup;
system->checkpoint->molecule_backup->next = NULL;
} else {
if (!system->checkpoint->head) { // if we're at the start of the list:
system->molecules = system->checkpoint->molecule_backup;
} else {
system->checkpoint->head->next = system->checkpoint->molecule_backup;
}
system->checkpoint->molecule_backup->next = system->checkpoint->molecule_altered;
}
/* set new altered and tail to reflect the insertion */
system->checkpoint->molecule_altered = system->checkpoint->molecule_backup;
system->checkpoint->tail = system->checkpoint->molecule_altered->next;
system->checkpoint->molecule_backup = NULL;
if (system->num_insertion_molecules) { //multi sorbate
// Free all pair memory in the list
for (molecule_ptr = system->molecules; molecule_ptr; molecule_ptr = molecule_ptr->next) {
for (atom_ptr = molecule_ptr->atoms; atom_ptr; atom_ptr = atom_ptr->next) {
pair_ptr = atom_ptr->pairs;
while (pair_ptr) {
pair_t *temp = pair_ptr;
pair_ptr = pair_ptr->next;
free(temp);
}
}
}
// Generate new pairs lists for all atoms in system
setup_pairs(system);
} // only one sorbate
else
update_pairs_insert(system);
//reset atom and molecule id's
enumerate_particles(system);
break;
case MOVETYPE_REMOVE: /* remove a randomly chosen molecule */
if (system->cavity_bias) {
if (get_rand(system) < pow((1.0 - system->avg_observables->cavity_bias_probability),
((double)system->cavity_grid_size * system->cavity_grid_size * system->cavity_grid_size)))
system->checkpoint->biased_move = 0;
else
system->checkpoint->biased_move = 1;
}
/* remove 'altered' from the list */
if (!system->checkpoint->head) { /* handle the case where we're removing from the start of the list */
system->checkpoint->molecule_altered = system->molecules;
system->molecules = system->molecules->next;
} else {
system->checkpoint->head->next = system->checkpoint->tail;
}
free_molecule(system, system->checkpoint->molecule_altered);
system->checkpoint->molecule_altered = NULL; /* Insurance against memory errors */
update_pairs_remove(system);
//reset atom and molecule id's
enumerate_particles(system);
break;
case MOVETYPE_DISPLACE:
/* change coords of 'altered' */
if (system->rd_anharmonic)
displace_1D(system, system->checkpoint->molecule_altered, system->move_factor);
else if (system->spectre)
spectre_displace(system, system->checkpoint->molecule_altered, system->move_factor,
system->spectre_max_charge, system->spectre_max_target);
else if (system->gwp) {
if (system->checkpoint->molecule_altered->atoms->gwp_spin) {
displace(system, system->checkpoint->molecule_altered, system->pbc, system->gwp_probability, system->rot_factor);
displace_gwp(system, system->checkpoint->molecule_altered, system->gwp_probability);
} else
displace(system, system->checkpoint->molecule_altered, system->pbc, system->move_factor, system->rot_factor);
} else
displace(system, system->checkpoint->molecule_altered, system->pbc, system->move_factor, system->rot_factor);
break;
case MOVETYPE_ADIABATIC:
/* change coords of 'altered' */
displace(system, system->checkpoint->molecule_altered, system->pbc, system->adiabatic_probability, 1.0);
break;
case MOVETYPE_SPINFLIP:
if (get_rand(system) < 0.5)
system->checkpoint->molecule_altered->nuclear_spin = NUCLEAR_SPIN_PARA;
else
system->checkpoint->molecule_altered->nuclear_spin = NUCLEAR_SPIN_ORTHO;
break;
case MOVETYPE_VOLUME:
volume_change(system); // I don't want to contribute to the god damned mess -- kmclaugh
break;
default:
error(
"MC_MOVES: invalid mc move\n");
die(-1);
}
return;
}
int surface_dimer_parameters(system_t *system, param_g *params) {
int i = 0; // generic counter
molecule_t *molecule_ptr;
atom_t *atom_ptr;
param_t *param_ptr;
// Default bond partner for atoms without explicit site neighbor
atom_t *origin = calloc( sizeof(atom_t), 1 ); // calloc sets pos[] fields all to 0
memnullcheck( origin, sizeof(atom_t), __LINE__-1, __FILE__);
system->polar_damp = params->alpha;
for (molecule_ptr = system->molecules; molecule_ptr; molecule_ptr = molecule_ptr->next) {
for (atom_ptr = molecule_ptr->atoms; atom_ptr; atom_ptr = atom_ptr->next) {
for (param_ptr = params->type_params; param_ptr; param_ptr = param_ptr->next) {
if( !strcasecmp( param_ptr->atomtype, atom_ptr->atomtype )) {
atom_ptr->charge = param_ptr->charge;
atom_ptr->epsilon = param_ptr->epsilon;
atom_ptr->sigma = param_ptr->sigma;
atom_ptr->omega = param_ptr->omega;
atom_ptr->polarizability = param_ptr->pol;
atom_ptr->c6 = param_ptr->c6;
atom_ptr->c8 = param_ptr->c8;
atom_ptr->c10 = param_ptr->c10;
double perturbation_vector[3];
// Find the the atom that defines the bond axis and store for easy reference
atom_t *snPtr = 0;
if( atom_ptr->site_neighbor_id == 0 )
snPtr = origin;
else {
snPtr = find_atom_by_id( system, atom_ptr->site_neighbor_id );
if( !snPtr ) {
snPtr = origin;
printf( "\n*** WARNING ***\n" );
printf( "Bonding partner for atom %d not found ", atom_ptr->bond_id );
printf( "--> %d, possibly invalid. Using origin.\n\n", atom_ptr->site_neighbor_id );
}
}
// Generate the vector along which the dr perturbations will occur
for (i = 0; i < 3; i++)
perturbation_vector[i] = atom_ptr->pos[i] - snPtr->pos[i];
// Determine how much the bond vector should be scaled to increase the length by dr.
double scale = find_scale_factor(perturbation_vector[0], perturbation_vector[1], perturbation_vector[2], param_ptr->dr);
// Scale the perturbation vector
for (i = 0; i < 3; i++)
perturbation_vector[i] *= scale;
// Add the vector back to the bond partner coordinates to get the new position.
for (i = 0; i < 3; i++)
atom_ptr->pos[i] = snPtr->pos[i] + perturbation_vector[i];
}
} // for param_ptr
} // for atom_ptr
} // for molecule_ptr
free(origin);
return (0);
}
/* make an exact copy of src */
molecule_t *copy_molecule(system_t *system, molecule_t *src) {
molecule_t *dst;
atom_t *atom_dst_ptr, *prev_atom_dst_ptr, *atom_src_ptr;
pair_t *pair_dst_ptr, *prev_pair_dst_ptr, *pair_src_ptr;
/* allocate the start of the new lists */
dst = calloc(1, sizeof(molecule_t));
memnullcheck(dst, sizeof(molecule_t), __LINE__ - 1, __FILE__);
/* copy molecule attributes */
dst->id = src->id;
strcpy(dst->moleculetype, src->moleculetype);
dst->mass = src->mass;
dst->frozen = src->frozen;
dst->adiabatic = src->adiabatic;
dst->spectre = src->spectre;
dst->target = src->target;
dst->nuclear_spin = src->nuclear_spin;
dst->rot_partfunc_g = src->rot_partfunc_g;
dst->rot_partfunc_u = src->rot_partfunc_u;
dst->rot_partfunc = src->rot_partfunc;
memcpy(dst->com, src->com, 3 * sizeof(double));
memcpy(dst->wrapped_com, src->wrapped_com, 3 * sizeof(double));
#ifdef QM_ROTATION
int i, j;
if (system->quantum_rotation) {
dst->quantum_rotational_energies = calloc(system->quantum_rotation_level_max, sizeof(double));
memnullcheck(dst->quantum_rotational_energies, system->quantum_rotation_level_max * sizeof(double), __LINE__ - 1, __FILE__);
dst->quantum_rotational_eigenvectors = calloc(system->quantum_rotation_level_max, sizeof(complex_t *));
memnullcheck(dst->quantum_rotational_eigenvectors, system->quantum_rotation_level_max * sizeof(complex_t *), __LINE__ - 1, __FILE__);
for (i = 0; i < system->quantum_rotation_level_max; i++) {
dst->quantum_rotational_eigenvectors[i] = calloc((system->quantum_rotation_l_max + 1) * (system->quantum_rotation_l_max + 1), sizeof(complex_t));
memnullcheck(dst->quantum_rotational_eigenvectors[i], (system->quantum_rotation_l_max + 1) * (system->quantum_rotation_l_max + 1) * sizeof(complex_t), __LINE__ - 1, __FILE__);
}
dst->quantum_rotational_eigensymmetry = calloc(system->quantum_rotation_level_max, sizeof(int));
memnullcheck(dst->quantum_rotational_eigensymmetry, system->quantum_rotation_level_max * sizeof(int), __LINE__ - 1, __FILE__);
memcpy(dst->quantum_rotational_energies, src->quantum_rotational_energies, system->quantum_rotation_level_max * sizeof(double));
for (i = 0; i < system->quantum_rotation_level_max; i++) {
for (j = 0; j < (system->quantum_rotation_l_max + 1) * (system->quantum_rotation_l_max + 1); j++) {
dst->quantum_rotational_eigenvectors[i][j].real = src->quantum_rotational_eigenvectors[i][j].real;
dst->quantum_rotational_eigenvectors[i][j].imaginary = src->quantum_rotational_eigenvectors[i][j].imaginary;
}
}
memcpy(dst->quantum_rotational_eigensymmetry, src->quantum_rotational_eigensymmetry, system->quantum_rotation_level_max * sizeof(int));
}
#endif /* QM_ROTATION */
dst->next = NULL;
/* new atoms list */
dst->atoms = calloc(1, sizeof(atom_t));
memnullcheck(dst->atoms, sizeof(atom_t), __LINE__ - 1, __FILE__);
prev_atom_dst_ptr = dst->atoms;
for (atom_dst_ptr = dst->atoms, atom_src_ptr = src->atoms; atom_src_ptr; atom_dst_ptr = atom_dst_ptr->next, atom_src_ptr = atom_src_ptr->next) {
atom_dst_ptr->id = atom_src_ptr->id;
strcpy(atom_dst_ptr->atomtype, atom_src_ptr->atomtype);
atom_dst_ptr->frozen = atom_src_ptr->frozen;
atom_dst_ptr->adiabatic = atom_src_ptr->adiabatic;
atom_dst_ptr->spectre = atom_src_ptr->spectre;
atom_dst_ptr->target = atom_src_ptr->target;
atom_dst_ptr->mass = atom_src_ptr->mass;
atom_dst_ptr->charge = atom_src_ptr->charge;
atom_dst_ptr->gwp_alpha = atom_src_ptr->gwp_alpha;
atom_dst_ptr->gwp_spin = atom_src_ptr->gwp_spin;
atom_dst_ptr->polarizability = atom_src_ptr->polarizability;
atom_dst_ptr->omega = atom_src_ptr->omega;
atom_dst_ptr->epsilon = atom_src_ptr->epsilon;
atom_dst_ptr->sigma = atom_src_ptr->sigma;
atom_dst_ptr->gwp_spin = atom_src_ptr->gwp_spin;
atom_dst_ptr->c6 = atom_src_ptr->c6;
atom_dst_ptr->c8 = atom_src_ptr->c8;
atom_dst_ptr->c10 = atom_src_ptr->c10;
atom_dst_ptr->c9 = atom_src_ptr->c9;
memcpy(atom_dst_ptr->pos, atom_src_ptr->pos, 3 * sizeof(double));
memcpy(atom_dst_ptr->wrapped_pos, atom_src_ptr->wrapped_pos, 3 * sizeof(double));
memcpy(atom_dst_ptr->ef_static, atom_src_ptr->ef_static, 3 * sizeof(double));
memcpy(atom_dst_ptr->ef_induced, atom_src_ptr->ef_induced, 3 * sizeof(double));
memcpy(atom_dst_ptr->mu, atom_src_ptr->mu, 3 * sizeof(double));
memcpy(atom_dst_ptr->old_mu, atom_src_ptr->old_mu, 3 * sizeof(double));
memcpy(atom_dst_ptr->new_mu, atom_src_ptr->new_mu, 3 * sizeof(double));
atom_dst_ptr->pairs = calloc(1, sizeof(pair_t));
memnullcheck(atom_dst_ptr->pairs, sizeof(pair_t), __LINE__ - 1, __FILE__);
pair_dst_ptr = atom_dst_ptr->pairs;
prev_pair_dst_ptr = pair_dst_ptr;
for (pair_src_ptr = atom_src_ptr->pairs; pair_src_ptr; pair_src_ptr = pair_src_ptr->next) {
pair_dst_ptr->rd_energy = pair_src_ptr->rd_energy;
pair_dst_ptr->es_real_energy = pair_src_ptr->es_real_energy;
pair_dst_ptr->es_self_intra_energy = pair_src_ptr->es_self_intra_energy;
pair_dst_ptr->frozen = pair_src_ptr->frozen;
pair_dst_ptr->rd_excluded = pair_src_ptr->rd_excluded;
pair_dst_ptr->es_excluded = pair_src_ptr->es_excluded;
// pair_dst_ptr->charge = pair_src_ptr->charge;
// pair_dst_ptr->gwp_alpha = pair_src_ptr->gwp_alpha;
// pair_dst_ptr->gwp_spin = pair_src_ptr->gwp_spin;
pair_dst_ptr->epsilon = pair_src_ptr->epsilon;
pair_dst_ptr->lrc = pair_src_ptr->lrc;
pair_dst_ptr->sigma = pair_src_ptr->sigma;
pair_dst_ptr->r = pair_src_ptr->r;
pair_dst_ptr->rimg = pair_src_ptr->rimg;
pair_dst_ptr->next = calloc(1, sizeof(pair_t));
memnullcheck(pair_dst_ptr->next, sizeof(pair_t), __LINE__ - 1, __FILE__);
prev_pair_dst_ptr = pair_dst_ptr;
pair_dst_ptr = pair_dst_ptr->next;
}
prev_pair_dst_ptr->next = NULL;
free(pair_dst_ptr);
/* handle an empty list */
if (!atom_src_ptr->pairs) atom_dst_ptr->pairs = NULL;
prev_atom_dst_ptr = atom_dst_ptr;
atom_dst_ptr->next = calloc(1, sizeof(atom_t));
memnullcheck(atom_dst_ptr->next, sizeof(atom_t), __LINE__ - 1, __FILE__);
}
prev_atom_dst_ptr->next = NULL;
free(atom_dst_ptr);
return (dst);
}
int main(int argc, char **argv) {
char linebuf[MAXLINE];
char input_file[MAXLINE];
system_t *system;
time_t t = time(NULL);
struct tm tm = *localtime(&t);
/* set the default rank */
rank = 0; size = 1;
/* check args */
if(argc < 2) usage(argv[0]);
/* start up the MPI chain */
#ifdef MPI
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
#endif /* MPI */
if( !rank ) {
sprintf(linebuf, "MPMC (Massively Parallel Monte Carlo) r%d - 2012-2017 GNU Public License\n", VERSION);
output(linebuf);
sprintf(linebuf, "MAIN: processes started on %d cores @ %d-%d-%d %d:%d:%d\n", size, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
output(linebuf);
}
#ifndef MPI
FILE *procfile;
FILE *host;
char nodename[MAXLINE];
char cpu[MAXLINE];
struct stat info;
// These system calls were causing a fork() that does not play nice with some
// MPI implementations (causing some processes to never end... )
/* Collect and output hostname & processor info */
if(access("/proc/cpuinfo",R_OK)!=-1) { // Linux
host = popen("hostname","r");
fgets(nodename, MAXLINE, host);
sprintf(linebuf, "MAIN: Job running on node -> %s", nodename);
output(linebuf);
pclose(host);
procfile = fopen("/proc/cpuinfo", "r");
while (!feof(procfile)) {
fgets(cpu, MAXLINE, procfile);
if(strncasecmp(cpu,"model name",10)==0) {
sprintf(linebuf, "MAIN: CPU -> %s", cpu);
output(linebuf);
break;
}
}
fclose(procfile);
} else if (stat("/Applications",&info)==0) { // Mac OS
output("MAIN: Mac OS detected\n");
host = popen("hostname", "r");
fgets(nodename, MAXLINE, host);
sprintf(linebuf, "MAIN: Job running on node -> %s", nodename);
output(linebuf);
pclose(host);
procfile = popen("sysctl -n machdep.cpu.brand_string","r");
fgets(cpu, MAXLINE, procfile);
sprintf(linebuf, "MAIN: CPU -> %s", cpu);
output(linebuf);
pclose(procfile);
}
#endif // !MPI
/* get the config file arg */
strcpy(input_file, argv[1]);
sprintf(linebuf, "MAIN: running parameters found in %s\n", input_file);
output(linebuf);
/* read the input files and setup the simulation */
system = setup_system(input_file);
if(!system) {
error("MAIN: could not initialize the simulation\n");
die(1);
} else {
output("MAIN: the simulation has been initialized\n");
}
/* install the signal handler to catch SIGTERM cleanly */
terminate_handler(-1, system);
signal(SIGTERM, ((void *)(terminate_handler)));
signal(SIGUSR1, ((void *)(terminate_handler)));
signal(SIGUSR2, ((void *)(terminate_handler)));
output("MAIN: signal handler installed\n");
/* allocate space for the statistics */
system->nodestats = calloc(1, sizeof(nodestats_t));
memnullcheck(system->nodestats,sizeof(nodestats_t), __LINE__-1, __FILE__);
system->avg_nodestats = calloc(1, sizeof(avg_nodestats_t));
memnullcheck(system->avg_nodestats,sizeof(avg_nodestats_t), __LINE__-1, __FILE__);
system->observables = calloc(1, sizeof(observables_t));
memnullcheck(system->observables,sizeof(observables_t), __LINE__-1, __FILE__);
system->avg_observables = calloc(1, sizeof(avg_observables_t));
memnullcheck(system->avg_observables,sizeof(avg_observables_t), __LINE__-1, __FILE__);
system->checkpoint = calloc(1, sizeof(checkpoint_t));
memnullcheck(system->checkpoint,sizeof(checkpoint_t), __LINE__-1, __FILE__);
system->checkpoint->observables = calloc(1, sizeof(observables_t));
memnullcheck(system->checkpoint->observables,sizeof(observables_t), __LINE__-1, __FILE__);
system->grids = calloc(1,sizeof(grid_t));
memnullcheck(system->grids,sizeof(grid_t), __LINE__-1, __FILE__);
system->grids->histogram = calloc(1,sizeof(histogram_t));
memnullcheck(system->grids->histogram,sizeof(histogram_t), __LINE__-1, __FILE__);
system->grids->avg_histogram = calloc(1,sizeof(histogram_t));
memnullcheck(system->grids->avg_histogram,sizeof(histogram_t), __LINE__-1, __FILE__);
/* if polarization active, allocate the necessary matrices */
if(system->polarization && !system->cuda && !system->polar_zodid)
thole_resize_matrices(system);
/* if histogram calculation flag is set, allocate grid */
if(system->calc_hist){
setup_histogram(system);
allocate_histogram_grid(system);
}
/* seed the rng if neccessary */
if ( system->ensemble != ENSEMBLE_TE && system->ensemble != ENSEMBLE_REPLAY )
seed_rng(system, rank);
#ifdef MPI
MPI_Barrier(MPI_COMM_WORLD);
sprintf(linebuf, "MAIN: all %d cores are in sync\n", size);
output(linebuf);
#endif /* MPI */
/* start the MC simulation */
if(system->ensemble == ENSEMBLE_UVT) {
output("MAIN: *******************************************************\n");
output("MAIN: *** starting Grand Canonical Monte Carlo simulation ***\n");
output("MAIN: *******************************************************\n");
} else if(system->ensemble == ENSEMBLE_NVT) {
output("MAIN: *************************************************\n");
output("MAIN: *** starting Canonical Monte Carlo simulation ***\n");
output("MAIN: *************************************************\n");
} else if(system->ensemble == ENSEMBLE_NVE) {
output("MAIN: ******************************************************\n");
output("MAIN: *** starting Microcanonical Monte Carlo simulation ***\n");
output("MAIN: ******************************************************\n");
} else if(system->ensemble == ENSEMBLE_SURF) { /* surface run */
output("MAIN: *****************************************************\n");
output("MAIN: *** starting potential energy surface calculation ***\n");
output("MAIN: *****************************************************\n");
} else if(system->ensemble == ENSEMBLE_REPLAY) { /* surface fitting run */
output("MAIN: **********************************\n");
output("MAIN: *** starting trajectory replay ***\n");
output("MAIN: **********************************\n");
} else if(system->ensemble == ENSEMBLE_SURF_FIT) { /* surface fitting run */
output("MAIN: *************************************************************\n");
output("MAIN: *** starting potential energy surface fitting calculation ***\n");
output("MAIN: *************************************************************\n");
} else if(system->ensemble == ENSEMBLE_TE) { /* surface fitting run */
output("MAIN: *************************************************\n");
output("MAIN: *** starting single-point energy calculation ***\n");
output("MAIN: *************************************************\n");
}
if(system->ensemble == ENSEMBLE_SURF) { /* surface */
if(surface(system) < 0) {
error("MAIN: surface module failed on error, exiting\n");
die(1);
}
}
else if(system->ensemble == ENSEMBLE_SURF_FIT) { /* surface fitting */
if( system->surf_fit_arbitrary_configs ) {
if( surface_fit_arbitrary( system ) < 0 ) {
error("MAIN: surface fitting module (for arbitrary configurations) failed on error, exiting\n");
die(1);
}
}
else if(surface_fit(system) < 0) {
error("MAIN: surface fitting module failed on error, exiting\n");
die(1);
}
}
else if(system->ensemble == ENSEMBLE_REPLAY) { /* replay trajectory and recalc energies, etc. */
if(replay_trajectory(system) < 0) {
error("MAIN: trajectory replay failed, exiting\n");
die(1);
}
}
else if(system->ensemble == ENSEMBLE_TE) {
if(calculate_te(system) < 0) {
error("MAIN: single-point energy calculation failed, exiting\n");
die(1);
}
}
else { //else run monte carlo
if(mc(system) < 0) {
error("MAIN: MC failed on error, exiting\n");
die(1);
}
}
/* cleanup */
output("MAIN: freeing all data structures....");
cleanup(system);
output("...done\n");
output("MAIN: simulation exiting successfully\n\n");
die(0);
return 0;
}
/* returns the number of iterations required */
int thole_iterative(system_t *system) {
int i, N, p;
int iteration_counter, keep_iterating;
atom_t **aa; //atom array
int *ranked_array;
aa = system->atom_array;
N = system->natoms;
/* array for ranking */
ranked_array = calloc(N, sizeof(int));
memnullcheck(ranked_array, N * sizeof(int), __LINE__ - 1, __FILE__);
for (i = 0; i < N; i++) ranked_array[i] = i;
//set all dipoles to alpha*E_static * polar_gamma
init_dipoles(system);
/* if ZODID is enabled, then stop here and just return the alpha*E dipoles */
if (system->polar_zodid) {
free(ranked_array);
return (0);
}
/* iterative solver of the dipole field equations */
keep_iterating = 1;
iteration_counter = 0;
while (keep_iterating) {
iteration_counter++;
/* divergence detection */
/* if we fail to converge, then return dipoles as alpha*E */
if (iteration_counter >= MAX_ITERATION_COUNT && system->polar_precision) {
for (i = 0; i < N; i++)
for (p = 0; p < 3; p++) {
aa[i]->mu[p] = aa[i]->polarizability * (aa[i]->ef_static[p] + aa[i]->ef_static_self[p]);
aa[i]->ef_induced_change[p] = 0.0; //so we don't break palmo
}
//set convergence failure flag
system->iter_success = 1;
free(ranked_array);
return (iteration_counter);
}
//zero out induced e-field
for (i = 0; i < system->natoms; i++)
for (p = 0; p < 3; p++)
aa[i]->ef_induced[p] = 0;
//save the current dipole information if we want to calculate precision (or if needed for relaxation)
if (system->polar_rrms || system->polar_precision > 0 || system->polar_sor || system->polar_esor) {
for (i = 0; i < N; i++)
for (p = 0; p < 3; p++)
aa[i]->old_mu[p] = aa[i]->mu[p];
}
// contract the dipoles with the field tensor (gauss-seidel/gs-ranked optional)
contract_dipoles(system, ranked_array);
if (system->polar_rrms || system->polar_precision > 0)
calc_dipole_rrms(system);
/* determine if we are done... */
keep_iterating = are_we_done_yet(system, iteration_counter);
// if we would be finished, we want to contract once more to get the next induced field for palmo
if (system->polar_palmo && !keep_iterating)
palmo_contraction(system, ranked_array);
//new gs_ranking if needed
if (system->polar_gs_ranked && keep_iterating)
update_ranking(system, ranked_array);
/* save the dipoles for the next pass */
for (i = 0; i < N; i++) {
for (p = 0; p < 3; p++) {
/* allow for different successive over-relaxation schemes */
if (system->polar_sor)
aa[i]->mu[p] = system->polar_gamma * aa[i]->new_mu[p] + (1.0 - system->polar_gamma) * aa[i]->old_mu[p];
else if (system->polar_esor)
aa[i]->mu[p] = (1.0 - exp(-system->polar_gamma * iteration_counter)) * aa[i]->new_mu[p] + exp(-system->polar_gamma * iteration_counter) * aa[i]->old_mu[p];
else
aa[i]->mu[p] = aa[i]->new_mu[p];
}
}
} //end iterate
free(ranked_array);
/* return the iteration count */
return (iteration_counter);
}
molecule_t *read_insertion_molecules(system_t *system) {
int j;
molecule_t *molecules,
*molecule_ptr;
atom_t *atom_ptr,
*prev_atom_ptr;
char linebuf[MAXLINE], *n;
FILE *fp;
char token_atom[MAXLINE], token_atomid[MAXLINE], token_atomtype[MAXLINE],
token_moleculetype[MAXLINE],
token_frozen[MAXLINE],
token_moleculeid[MAXLINE],
token_x[MAXLINE], token_y[MAXLINE], token_z[MAXLINE],
token_mass[MAXLINE],
token_charge[MAXLINE],
token_alpha[MAXLINE], token_epsilon[MAXLINE], token_sigma[MAXLINE],
token_omega[MAXLINE], token_gwp_alpha[MAXLINE],
token_c6[MAXLINE], token_c8[MAXLINE], token_c10[MAXLINE], token_c9[MAXLINE];
int current_frozen,
current_adiabatic,
current_spectre,
current_target,
current_moleculeid,
current_atomid,
current_site_neighbor;
double current_x, current_y, current_z,
current_mass, current_charge,
current_alpha, current_epsilon, current_sigma, current_omega, current_gwp_alpha,
current_c6, current_c8, current_c10, current_c9;
int atom_counter;
// allocate the start of the list
molecules = calloc(1, sizeof(molecule_t));
memnullcheck(molecules,sizeof(molecule_t),__LINE__-1, __FILE__);
molecule_ptr = molecules;
molecule_ptr->id = 1;
molecule_ptr->atoms = calloc(1, sizeof(atom_t));
memnullcheck(molecule_ptr->atoms,sizeof(atom_t),__LINE__-1, __FILE__);
atom_ptr = molecule_ptr->atoms;
prev_atom_ptr = atom_ptr;
// open the molecule input file
fp = fopen(system->insert_input, "r");
filecheck(fp,system->insert_input,READ);
// clear the linebuffer and read the tokens in
atom_counter = 0;
memset(linebuf, 0, MAXLINE);
n = fgets(linebuf, MAXLINE, fp);
while(n) {
// clear the tokens
memset( token_atom, 0, MAXLINE);
memset( token_atomid, 0, MAXLINE);
memset( token_atomtype, 0, MAXLINE);
memset( token_moleculetype, 0, MAXLINE);
memset( token_frozen, 0, MAXLINE);
memset( token_moleculeid, 0, MAXLINE);
memset( token_x, 0, MAXLINE);
memset( token_y, 0, MAXLINE);
memset( token_z, 0, MAXLINE);
memset( token_mass, 0, MAXLINE);
memset( token_charge, 0, MAXLINE);
memset( token_alpha, 0, MAXLINE);
memset( token_epsilon, 0, MAXLINE);
memset( token_sigma, 0, MAXLINE);
memset( token_omega, 0, MAXLINE);
memset( token_gwp_alpha, 0, MAXLINE);
memset(token_c6, 0, MAXLINE);
memset(token_c8, 0, MAXLINE);
memset(token_c10, 0, MAXLINE);
memset(token_c9, 0, MAXLINE);
// parse the input line
sscanf(linebuf, "%s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s\n",
token_atom, token_atomid, token_atomtype,
token_moleculetype,
token_frozen,
token_moleculeid,
token_x, token_y, token_z,
token_mass, token_charge,
token_alpha, token_epsilon, token_sigma, token_omega, token_gwp_alpha,
token_c6, token_c8, token_c10, token_c9
);
if(!strcasecmp(token_atom, "ATOM") && strcasecmp(token_moleculetype, "BOX")) {
current_frozen = 0; current_adiabatic = 0; current_spectre = 0; current_target = 0;
if(!strcasecmp(token_frozen, "F"))
current_frozen = 1;
if(!strcasecmp(token_frozen, "A"))
current_adiabatic = 1;
if(!strcasecmp(token_frozen, "S"))
current_spectre = 1;
if(!strcasecmp(token_frozen, "T"))
current_target = 1;
current_moleculeid = atoi(token_moleculeid);
current_atomid = atoi(token_atomid);
current_x = atof(token_x);
current_y = atof(token_y);
current_z = atof(token_z);
current_mass = atof(token_mass); // mass in amu
current_charge = atof(token_charge);
current_charge *= E2REDUCED; // convert charge into reduced units
current_alpha = atof(token_alpha);
current_epsilon = atof(token_epsilon);
current_sigma = atof(token_sigma);
current_omega = atof(token_omega);
current_gwp_alpha = atof(token_gwp_alpha);
current_c6 = atof(token_c6);
current_c8 = atof(token_c8);
current_c10 = atof(token_c10);
current_c9 = atof(token_c9);
if ( system->cdvdw_sig_repulsion ) {
if ( current_epsilon != 1.0 ) {
error("warning: setting epsilon to 1.0 (due to sig_repulsion)\n");
current_epsilon = 1.0;
}
}
else if ( system->polarvdw ) {
if ( current_sigma != 1.0 ) {
error("warning: setting sigma to 1.0 (due to polarvdw)\n");
current_sigma = 1.0;
}
}
// Functionality of site_neighbor disabled in favor of omega/gwp_alpha parameters
// Current behavior is to default to atom 0, typically the center of mass for
// the molecule.
current_site_neighbor = 0;
if(current_frozen)
current_charge *= system->scale_charge;
if(molecule_ptr->id != current_moleculeid) {
molecule_ptr->next = calloc(1, sizeof(molecule_t));
memnullcheck(molecule_ptr->next,sizeof(molecule_t),__LINE__-1, __FILE__);
molecule_ptr = molecule_ptr->next;
molecule_ptr->atoms = calloc(1, sizeof(atom_t));
memnullcheck(molecule_ptr->atoms,sizeof(atom_t),__LINE__-1, __FILE__);
prev_atom_ptr->next = NULL;
free(atom_ptr);
atom_ptr = molecule_ptr->atoms;
}
strcpy(molecule_ptr->moleculetype, token_moleculetype);
molecule_ptr->id = current_moleculeid;
molecule_ptr->frozen = current_frozen;
molecule_ptr->adiabatic = current_adiabatic;
molecule_ptr->spectre = current_spectre;
molecule_ptr->target = current_target;
molecule_ptr->mass += current_mass;
#ifdef QM_ROTATION
/* if quantum rot calc. enabled, allocate the necessary structures */
if(system->quantum_rotation && !molecule_ptr->frozen && !molecule_ptr->quantum_rotational_energies )
allocqmrotation(system,molecule_ptr);
#endif /* QM_ROTATION */
#ifdef XXX
/* if quantum vib calc. enabled, allocate the necessary structures */
if(system->quantum_vibration && !molecule_ptr->frozen)
allocqmvibration(system,molecule_ptr);
#endif /* XXX */
++atom_counter;
atom_ptr->id = atom_counter;
atom_ptr->bond_id = current_atomid;
memset(atom_ptr->atomtype, 0, MAXLINE);
strcpy(atom_ptr->atomtype, token_atomtype);
atom_ptr->frozen = current_frozen;
atom_ptr->adiabatic = current_adiabatic;
atom_ptr->spectre = current_spectre;
atom_ptr->target = current_target;
atom_ptr->pos[0] = current_x;
atom_ptr->pos[1] = current_y;
atom_ptr->pos[2] = current_z;
atom_ptr->mass = current_mass;
atom_ptr->charge = current_charge;
atom_ptr->polarizability = current_alpha;
atom_ptr->epsilon = current_epsilon;
atom_ptr->sigma = current_sigma;
atom_ptr->omega = current_omega;
atom_ptr->gwp_alpha = current_gwp_alpha;
atom_ptr->c6 = current_c6;
atom_ptr->c8 = current_c8;
atom_ptr->c10 = current_c10;
atom_ptr->c9 = current_c9;
if(current_gwp_alpha != 0.)
atom_ptr->gwp_spin = 1;
else
atom_ptr->gwp_spin = 0;
atom_ptr->site_neighbor_id = current_site_neighbor;
atom_ptr->next = calloc(1, sizeof(atom_t));
memnullcheck(atom_ptr->next,sizeof(atom_t),__LINE__-1, __FILE__);
prev_atom_ptr = atom_ptr;
atom_ptr = atom_ptr->next;
}
memset(linebuf, 0, MAXLINE);
n = fgets(linebuf, MAXLINE, fp);
}
// terminate the atom list
prev_atom_ptr->next = NULL;
free(atom_ptr);
// Count the molecules and create an array of pointers, where each pointer
// points directly to a molecule in the linked list. While counting the
// molecules, check to see whether or not each sorbate is included in the
// sorbate statistics list, if it is not, we will create an entry for it
// so that each unique class of sorbate will have its own node in the stats
// list.
/////////////////////////////////////////////////////////////////////////////
// count
int molecule_counter = 0;
for(molecule_ptr = molecules; molecule_ptr; molecule_ptr = molecule_ptr->next) {
molecule_counter++;
// Check to see if this molecule is a new sorbate.
if( sorbateIs_Not_InList(system, molecule_ptr->moleculetype) ) {
system->sorbateCount++;
addSorbateToList(system, molecule_ptr->moleculetype);
for ( j=0; j<system->sorbateCount; j++ ) {
if( !strcasecmp( system->sorbateInfo[j].id, molecule_ptr->moleculetype )){
system->sorbateInfo[j].mass = molecule_ptr->mass;
break;
}
}
}
}
// allocate space for array that will give direct access to insertion-candidate
// molecules in the linked list.
system->insertion_molecules_array = malloc( molecule_counter * sizeof(molecule_t*) );
memnullcheck(system->insertion_molecules_array, molecule_counter*sizeof(molecule_t *), __LINE__-1, __FILE__);
// point array pointers to their corresponding molecules
molecule_counter=0;
for(molecule_ptr = molecules; molecule_ptr; molecule_ptr = molecule_ptr->next) {
system->insertion_molecules_array[ molecule_counter ] = molecule_ptr;
molecule_counter++;
}
system->num_insertion_molecules = molecule_counter;
// ERROR CHECKING OF SOME SORT MAY NEED TO GO HERE
// WHAT'S ALLOWED/DISALLOWED FOR INSERTED MOLECULES?
/////////////////////////////////////////////////////////
fclose(fp);
return(molecules);
}
molecule_t *read_molecules(FILE * fp, system_t *system) {
molecule_t *molecules, *molecule_ptr;
atom_t *atom_ptr, *prev_atom_ptr;
char linebuf[MAXLINE];
char token_atom[MAXLINE], token_atomid[MAXLINE], token_atomtype[MAXLINE], token_moleculetype[MAXLINE],
token_frozen[MAXLINE], token_moleculeid[MAXLINE], token_x[MAXLINE], token_y[MAXLINE], token_z[MAXLINE],
token_mass[MAXLINE], token_charge[MAXLINE], token_alpha[MAXLINE], token_epsilon[MAXLINE],
token_sigma[MAXLINE], token_omega[MAXLINE], token_gwp_alpha[MAXLINE], token_c6[MAXLINE], token_c8[MAXLINE], token_c10[MAXLINE], token_c9[MAXLINE];
int current_frozen, current_adiabatic, current_spectre, current_target, current_moleculeid,
current_atomid, current_site_neighbor, moveable, spectres, targets, atom_counter;
double current_x, current_y, current_z,
current_mass, current_charge, current_alpha, current_epsilon,
current_sigma, current_omega, current_gwp_alpha, current_c6,
current_c8, current_c10, current_c9; //, current_molecule_mass; (unused variable)
fpos_t file_pos;
fgetpos(fp,&file_pos); //get file pointer position, we will restore this when done
/* allocate the start of the list */
molecules = calloc(1, sizeof(molecule_t));
memnullcheck(molecules,sizeof(molecule_t), __LINE__-1, __FILE__);
molecule_ptr = molecules;
molecule_ptr->id = 1;
molecule_ptr->atoms = calloc(1, sizeof(atom_t));
memnullcheck(molecule_ptr->atoms,sizeof(atom_t),__LINE__-1, __FILE__);
atom_ptr = molecule_ptr->atoms;
prev_atom_ptr = atom_ptr;
/* clear the linebuffer and read the tokens in */
atom_counter = 0;
memset(linebuf, 0, MAXLINE);
while(fgets(linebuf,MAXLINE,fp)) {
/* clear the tokens */
memset(token_atom, 0, MAXLINE);
memset(token_atomid, 0, MAXLINE);
memset(token_atomtype, 0, MAXLINE);
memset(token_moleculetype, 0, MAXLINE);
memset(token_frozen, 0, MAXLINE);
memset(token_moleculeid, 0, MAXLINE);
memset(token_x, 0, MAXLINE);
memset(token_y, 0, MAXLINE);
memset(token_z, 0, MAXLINE);
memset(token_mass, 0, MAXLINE);
memset(token_charge, 0, MAXLINE);
memset(token_alpha, 0, MAXLINE);
memset(token_epsilon, 0, MAXLINE);
memset(token_sigma, 0, MAXLINE);
memset(token_omega, 0, MAXLINE);
memset(token_gwp_alpha, 0, MAXLINE);
memset(token_c6, 0, MAXLINE);
memset(token_c8, 0, MAXLINE);
memset(token_c10, 0, MAXLINE);
memset(token_c9, 0, MAXLINE);
/* parse the line */
sscanf(linebuf, "%s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s\n",
token_atom, token_atomid, token_atomtype, token_moleculetype, token_frozen,
token_moleculeid, token_x, token_y, token_z, token_mass, token_charge,
token_alpha, token_epsilon, token_sigma, token_omega, token_gwp_alpha,
token_c6, token_c8, token_c10, token_c9);
if(!strncasecmp(token_atom, "END", 3)) break; //we've reached the end of the current molecule, quit looping
if(!strcasecmp(token_atom, "ATOM") && strcasecmp(token_moleculetype, "BOX")) {
current_frozen = 0; current_adiabatic = 0; current_spectre = 0; current_target = 0;
if(!strcasecmp(token_frozen, "F"))
current_frozen = 1;
if(!strcasecmp(token_frozen, "A"))
current_adiabatic = 1;
if(!strcasecmp(token_frozen, "S"))
current_spectre = 1;
if(!strcasecmp(token_frozen, "T"))
current_target = 1;
current_moleculeid = atoi(token_moleculeid);
current_atomid = atoi(token_atomid);
current_x = atof(token_x);
current_y = atof(token_y);
current_z = atof(token_z);
current_mass = atof(token_mass); /* mass in amu */
current_charge = atof(token_charge);
current_charge *= E2REDUCED; /* convert charge into reduced units */
current_alpha = atof(token_alpha);
current_epsilon = atof(token_epsilon);
current_sigma = atof(token_sigma);
current_omega = atof(token_omega);
current_gwp_alpha = atof(token_gwp_alpha);
current_c6 = atof(token_c6);
current_c8 = atof(token_c8);
current_c10 = atof(token_c10);
current_c9 = atof(token_c9);
if ( system->cdvdw_sig_repulsion ) {
if ( current_epsilon != 1.0 ) {
error("warning: setting epsilon to 1.0 (due to sig_repulsion)\n");
current_epsilon = 1.0;
}
}
else if ( system->polarvdw && !system->cdvdw_exp_repulsion ) {
if ( current_sigma != 1.0 ) {
error("warning: setting sigma to 1.0 (due to polarvdw)\n");
current_sigma = 1.0;
}
}
// Functionality of site_neighbor disabled in favor of omega/gwp_alpha parameters
// Current behavior is to default to atom 0, typically the center of mass for
// the molecule.
current_site_neighbor = 0; //atoi( token_site_neighbor );
if(current_frozen)
current_charge *= system->scale_charge;
if(molecule_ptr->id != current_moleculeid) {
molecule_ptr->next = calloc(1, sizeof(molecule_t));
memnullcheck(molecule_ptr,sizeof(molecule_t),__LINE__-1, __FILE__);
molecule_ptr = molecule_ptr->next;
molecule_ptr->atoms = calloc(1, sizeof(atom_t));
memnullcheck(molecule_ptr->atoms,sizeof(atom_t),__LINE__-1, __FILE__);
prev_atom_ptr->next = NULL;
free(atom_ptr);
atom_ptr = molecule_ptr->atoms;
}
strcpy(molecule_ptr->moleculetype, token_moleculetype);
molecule_ptr->id = current_moleculeid;
molecule_ptr->frozen = current_frozen;
molecule_ptr->adiabatic = current_adiabatic;
molecule_ptr->spectre = current_spectre;
molecule_ptr->target = current_target;
molecule_ptr->mass += current_mass;
#ifdef QM_ROTATION
/* if quantum rot calc. enabled, allocate the necessary structures */
if(system->quantum_rotation && !molecule_ptr->frozen && !molecule_ptr->quantum_rotational_energies )
allocqmrotation(system,molecule_ptr);
#endif /* QM_ROTATION */
#ifdef XXX
/* if quantum vib calc. enabled, allocate the necessary structures */
if(system->quantum_vibration && !molecule_ptr->frozen)
allocqmvibration(system,molecule_ptr);
#endif /* XXX */
++atom_counter;
atom_ptr->id = atom_counter;
atom_ptr->bond_id = current_atomid;
memset(atom_ptr->atomtype, 0, MAXLINE);
strcpy(atom_ptr->atomtype, token_atomtype);
atom_ptr->frozen = current_frozen;
atom_ptr->adiabatic = current_adiabatic;
atom_ptr->spectre = current_spectre;
atom_ptr->target = current_target;
atom_ptr->pos[0] = current_x;
atom_ptr->pos[1] = current_y;
atom_ptr->pos[2] = current_z;
atom_ptr->mass = current_mass;
atom_ptr->charge = current_charge;
atom_ptr->polarizability = current_alpha;
atom_ptr->epsilon = current_epsilon;
atom_ptr->sigma = current_sigma;
atom_ptr->omega = current_omega;
atom_ptr->gwp_alpha = current_gwp_alpha;
atom_ptr->c6 = current_c6;
atom_ptr->c8 = current_c8;
atom_ptr->c10 = current_c10;
atom_ptr->c9 = current_c9;
if(current_gwp_alpha != 0.)
atom_ptr->gwp_spin = 1;
else
atom_ptr->gwp_spin = 0;
atom_ptr->site_neighbor_id = current_site_neighbor;
atom_ptr->next = calloc(1, sizeof(atom_t));
memnullcheck(atom_ptr->next,sizeof(atom_t),__LINE__-1, __FILE__);
prev_atom_ptr = atom_ptr;
atom_ptr = atom_ptr->next;
}
memset(linebuf, 0, MAXLINE);
}
/* terminate the atom list */
prev_atom_ptr->next = NULL;
free(atom_ptr);
/* scan the list, make sure that there is at least one moveable molecule */
moveable = 0;
spectres = 0;
targets = 0;
for(molecule_ptr = molecules; molecule_ptr; molecule_ptr = molecule_ptr->next) {
if(!molecule_ptr->frozen ) ++moveable;
if(molecule_ptr ->target ) ++targets;
if(molecule_ptr ->spectre) ++spectres;
}
if(system->spectre) {
if(!spectres || !targets) {
error("INPUT: either no targets or spectres found\n");
return(NULL);
}
} else {
if(!moveable) {
error("INPUT: no moveable molecules found, there must be at least one in your PQR file\n");
return(NULL);
}
}
if (!atom_counter) {
free(molecules);
free(molecule_ptr);
return(NULL);
}
//if we're going to read box info, we need to rewind our file
if ( system->read_pqr_box_on )
fsetpos(fp,&file_pos);
return(molecules);
}
/* implements the Markov chain */
int mc(system_t *system) {
int j, msgsize;
double initial_energy, final_energy, current_energy;
double rot_partfunc;
observables_t *observables_mpi;
avg_nodestats_t *avg_nodestats_mpi;
sorbateInfo_t *sinfo_mpi = 0;
double *temperature_mpi = 0;
char *snd_strct = 0, *rcv_strct = 0;
system->count_autorejects = 0; // initialize counter for skipped close (unphysical) contacts
// char linebuf[MAXLINE]; (unused variable)
#ifdef MPI
MPI_Datatype msgtype;
#endif /* MPI */
/* allocate the statistics structures */
observables_mpi = calloc(1, sizeof(observables_t));
memnullcheck(observables_mpi, sizeof(observables_t), __LINE__ - 1, __FILE__);
avg_nodestats_mpi = calloc(1, sizeof(avg_nodestats_t));
memnullcheck(avg_nodestats_mpi, sizeof(avg_nodestats_t), __LINE__ - 1, __FILE__);
// if multiple-sorbates, allocate sorb statistics struct
if (system->sorbateCount > 1) {
sinfo_mpi = calloc(system->sorbateCount, sizeof(sorbateInfo_t));
memnullcheck(sinfo_mpi, sizeof(sorbateInfo_t), __LINE__ - 1, __FILE__);
system->sorbateGlobal = calloc(system->sorbateCount, sizeof(sorbateAverages_t));
memnullcheck(system->sorbateGlobal, sizeof(sorbateAverages_t), __LINE__ - 1, __FILE__);
}
// compute message size
msgsize = sizeof(observables_t) + sizeof(avg_nodestats_t);
if (system->calc_hist) msgsize += system->n_histogram_bins * sizeof(int);
if (system->sorbateCount > 1) msgsize += system->sorbateCount * sizeof(sorbateInfo_t);
#ifdef MPI
MPI_Type_contiguous(msgsize, MPI_BYTE, &msgtype);
MPI_Type_commit(&msgtype);
#endif /* MPI */
/* allocate MPI structures */
snd_strct = calloc(msgsize, 1);
memnullcheck(snd_strct, sizeof(msgsize), __LINE__ - 1, __FILE__);
if (!rank) {
rcv_strct = calloc(size, msgsize);
memnullcheck(rcv_strct, size * sizeof(msgsize), __LINE__ - 1, __FILE__);
temperature_mpi = calloc(size, sizeof(double)); //temperature list for parallel tempering
memnullcheck(temperature_mpi, size * sizeof(double), __LINE__ - 1, __FILE__);
}
/* update the grid for the first time */
if (system->cavity_bias) cavity_update_grid(system);
/* set volume observable */
system->observables->volume = system->pbc->volume;
/* get the initial energy of the system */
initial_energy = energy(system);
#ifdef QM_ROTATION
/* solve for the rotational energy levels */
if (system->quantum_rotation) quantum_system_rotational_energies(system);
#endif /* QM_ROTATION */
/* be a bit forgiving of the initial state */
if (!isfinite(initial_energy))
initial_energy = system->observables->energy = MAXVALUE;
/* if root, open necessary output files */
if (!rank)
if (open_files(system) < 0) {
error(
"MC: could not open files\n");
return (-1);
}
// write initial observables to stdout and logs
if (!rank) {
calc_system_mass(system);
// average in the initial values once (we don't want to double-count the initial state when using MPI)
update_root_averages(system, system->observables, system->avg_observables);
// average in the initial sorbate values
if (system->sorbateCount > 1) {
update_sorbate_info(system); //local update
update_root_sorb_averages(system, system->sorbateInfo); //global update
}
// write initial observables exactly once
if (system->file_pointers.fp_energy)
write_observables(system->file_pointers.fp_energy, system, system->observables, system->temperature);
if (system->file_pointers.fp_energy_csv)
write_observables_csv(system->file_pointers.fp_energy_csv, system, system->observables, system->temperature);
output(
"MC: initial values:\n");
write_averages(system);
}
/* save the initial state */
checkpoint(system);
/* main MC loop */
for (system->step = 1; system->step <= system->numsteps; (system->step)++) {
/* restore the last accepted energy */
initial_energy = system->observables->energy;
/* perturb the system */
make_move(system);
/* calculate the energy change */
final_energy = energy(system);
#ifdef QM_ROTATION
/* solve for the rotational energy levels */
if (system->quantum_rotation && (system->checkpoint->movetype == MOVETYPE_SPINFLIP))
quantum_system_rotational_energies(system);
#endif /* QM_ROTATION */
if (system->checkpoint->movetype != MOVETYPE_REMOVE)
rot_partfunc = system->checkpoint->molecule_altered->rot_partfunc;
else
rot_partfunc = system->checkpoint->molecule_backup->rot_partfunc;
/* treat a bad contact as a reject */
if (!isfinite(final_energy)){
system->observables->energy = MAXVALUE;
system->nodestats->boltzmann_factor = 0;
} else
boltzmann_factor(system, initial_energy, final_energy, rot_partfunc);
/* Metropolis function */
if ((get_rand(system) < system->nodestats->boltzmann_factor) && (system->iter_success == 0)) {
/////////// ACCEPT
current_energy = final_energy;
/* checkpoint */
checkpoint(system);
register_accept(system);
/* SA */
if (system->simulated_annealing) {
if (system->simulated_annealing_linear == 1) {
system->temperature = system->temperature + (system->simulated_annealing_target - system->temperature) / (system->numsteps - system->step);
if (system->numsteps - system->step == 0)
system->temperature = system->simulated_annealing_target;
} else
system->temperature = system->simulated_annealing_target + (system->temperature - system->simulated_annealing_target) * system->simulated_annealing_schedule;
}
} else {
/////////////// REJECT
current_energy = initial_energy; //used in parallel tempering
//reset the polar iterative failure flag
system->iter_success = 0;
/* restore from last checkpoint */
restore(system);
register_reject(system);
} // END REJECT
// perform parallel_tempering
if ((system->parallel_tempering) && (system->step % system->ptemp_freq == 0))
temper_system(system, current_energy);
/* track the acceptance_rate */
track_ar(system->nodestats);
/* each node calculates its stats */
update_nodestats(system->nodestats, system->avg_nodestats);
/* do this every correlation time, and at the very end */
if (!(system->step % system->corrtime) || (system->step == system->numsteps)) {
/* copy observables and avgs to the mpi send buffer */
/* histogram array is at the end of the message */
if (system->calc_hist) {
zero_grid(system->grids->histogram->grid, system);
population_histogram(system);
}
// update frozen and total system mass
calc_system_mass(system);
// update sorbate info on each node
if (system->sorbateCount > 1)
update_sorbate_info(system);
/*write trajectory files for each node -> one at a time to avoid disk congestion*/
#ifdef MPI
for (j = 0; j < size; j++) {
MPI_Barrier(MPI_COMM_WORLD);
if (j == rank) write_states(system);
}
#else
write_states(system);
#endif
/*restart files for each node -> one at a time to avoid disk congestion*/
if (write_molecules_wrapper(system, system->pqr_restart) < 0) {
error(
"MC: could not write restart state to disk\n");
return (-1);
}
/*dipole/field data for each node -> one at a time to avoid disk congestion*/
#ifdef MPI
if (system->polarization) {
for (j = 0; j < size; j++) {
MPI_Barrier(MPI_COMM_WORLD);
if (j == rank) {
write_dipole(system);
write_field(system);
}
}
}
#else
if (system->polarization) {
write_dipole(system);
write_field(system);
}
#endif
/* zero the send buffer */
memset(snd_strct, 0, msgsize);
memcpy(snd_strct, system->observables, sizeof(observables_t));
memcpy(snd_strct + sizeof(observables_t), system->avg_nodestats, sizeof(avg_nodestats_t));
if (system->calc_hist)
mpi_copy_histogram_to_sendbuffer(snd_strct + sizeof(observables_t) + sizeof(avg_nodestats_t),
system->grids->histogram->grid, system);
if (system->sorbateCount > 1)
memcpy(snd_strct + sizeof(observables_t) + sizeof(avg_nodestats_t) + (system->calc_hist) * system->n_histogram_bins * sizeof(int), //compensate for the size of hist data, if neccessary
system->sorbateInfo,
system->sorbateCount * sizeof(sorbateInfo_t));
if (!rank) memset(rcv_strct, 0, size * msgsize);
#ifdef MPI
MPI_Gather(snd_strct, 1, msgtype, rcv_strct, 1, msgtype, 0, MPI_COMM_WORLD);
MPI_Gather(&(system->temperature), 1, MPI_DOUBLE, temperature_mpi, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD);
//need to gather shit for sorbate stats also
#else
memcpy(rcv_strct, snd_strct, msgsize);
temperature_mpi[0] = system->temperature;
#endif /* MPI */
/* head node collects all observables and averages */
if (!rank) {
/* clear avg_nodestats to avoid double-counting */
clear_avg_nodestats(system);
//loop for each core -> shift data into variable_mpi, then average into avg_observables
for (j = 0; j < size; j++) {
/* copy from the mpi buffer */
memcpy(observables_mpi, rcv_strct + j * msgsize, sizeof(observables_t));
memcpy(avg_nodestats_mpi, rcv_strct + j * msgsize + sizeof(observables_t), sizeof(avg_nodestats_t));
if (system->calc_hist)
mpi_copy_rcv_histogram_to_data(rcv_strct + j * msgsize + sizeof(observables_t) + sizeof(avg_nodestats_t), system->grids->histogram->grid, system);
if (system->sorbateCount > 1)
memcpy(sinfo_mpi,
rcv_strct + j * msgsize + sizeof(observables_t) + sizeof(avg_nodestats_t) + (system->calc_hist) * system->n_histogram_bins * sizeof(int), //compensate for the size of hist data, if neccessary
system->sorbateCount * sizeof(sorbateInfo_t));
/* write observables */
if (system->file_pointers.fp_energy)
write_observables(system->file_pointers.fp_energy, system, observables_mpi, temperature_mpi[j]);
if (system->file_pointers.fp_energy_csv)
write_observables_csv(system->file_pointers.fp_energy_csv, system, observables_mpi, temperature_mpi[j]);
if (system->file_pointers.fp_xyz) {
write_molecules_xyz(system, system->file_pointers.fp_xyz); //L
}
/* collect the averages */
/* if parallel tempering, we will collect obserables from the coldest bath. this can't be done for
* nodestats though, since nodestats are averaged over each corrtime, rather than based on a single
* taken at the corrtime */
update_root_nodestats(system, avg_nodestats_mpi, system->avg_observables);
if (!system->parallel_tempering) {
update_root_averages(system, observables_mpi, system->avg_observables);
if (system->calc_hist) update_root_histogram(system);
if (system->sorbateCount > 1) update_root_sorb_averages(system, sinfo_mpi);
} else if (system->ptemp->index[j] == 0) {
update_root_averages(system, observables_mpi, system->avg_observables);
if (system->calc_hist) update_root_histogram(system);
if (system->sorbateCount > 1) update_root_sorb_averages(system, sinfo_mpi);
}
}
/* write the averages to stdout */
if (system->file_pointers.fp_histogram)
write_histogram(system->file_pointers.fp_histogram, system->grids->avg_histogram->grid, system);
if (write_performance(system->step, system) < 0) {
error(
"MC: could not write performance data to stdout\n");
return (-1);
}
if (write_averages(system) < 0) {
error(
"MC: could not write statistics to stdout\n");
return (-1);
}
} /* !rank */
} /* corrtime */
} /* main loop */
/* write output, close any open files */
free(snd_strct);
// restart files for each node
if (write_molecules_wrapper(system, system->pqr_output) < 0) {
error(
"MC: could not write final state to disk\n");
return (-1);
}
if (!rank) {
close_files(system);
free(rcv_strct);
free(temperature_mpi);
}
if (system->sorbateCount > 1) {
free(system->sorbateGlobal);
free(sinfo_mpi);
}
free(observables_mpi);
free(avg_nodestats_mpi);
printf(
"MC: Total auto-rejected moves: %i\n", system->count_autorejects);
return (0);
}
/* changing it so it rotates around the three principal axises - Adam Hogan */
void molecule_rotate_quaternion(molecule_t *molecule, double alpha, double beta, double gamma, int reverse_flag) {
atom_t *atom_ptr;
double com[3];
int i, ii, n;
double *new_coord_array;
/* count the number of atoms in a molecule, and allocate new coords array */
for(atom_ptr = molecule->atoms, n = 0; atom_ptr; atom_ptr = atom_ptr->next)
++n;
new_coord_array = calloc(n*3, sizeof(double));
memnullcheck(new_coord_array,n*3*sizeof(double),__LINE__-1, __FILE__);
/* save the com coordinate */
com[0] = molecule->com[0];
com[1] = molecule->com[1];
com[2] = molecule->com[2];
/* translate the molecule to the origin */
for(atom_ptr = molecule->atoms; atom_ptr; atom_ptr = atom_ptr->next) {
atom_ptr->pos[0] -= com[0];
atom_ptr->pos[1] -= com[1];
atom_ptr->pos[2] -= com[2];
}
/* construct the rotation quaternions */
struct quaternion first, second, third, total, total_conjugate, position, answer;
//total = quaternion with no rotation
quaternion_construct_xyzw(&total,0.,0.,0.,1.);
//first = rotation around z axis
quaternion_construct_axis_angle_degree(&first,0.,0.,1.,alpha);
//second = rotation around y axis
quaternion_construct_axis_angle_degree(&second,0.,1.,0.,beta);
//third = rotation around z axis
quaternion_construct_axis_angle_degree(&third,1.,0.,0.,gamma);
//combine all rotations into total
quaternion_multiplication(&first,&total,&total);
quaternion_multiplication(&second,&total,&total);
quaternion_multiplication(&third,&total,&total);
//if we are undoing a rotation we need to conjugate total
if (reverse_flag) quaternion_conjugate(&total,&total);
quaternion_conjugate(&total,&total_conjugate);
for(atom_ptr = molecule->atoms, i = 0; atom_ptr; atom_ptr = atom_ptr->next, i++) {
ii = i*3;
//position = position vector
quaternion_construct_xyzw(&position,atom_ptr->pos[0],atom_ptr->pos[1],atom_ptr->pos[2],0.);
//answer = total*(position*total_conjugate)
quaternion_multiplication(&position,&total_conjugate,&answer);
quaternion_multiplication(&total,&answer,&answer);
//set the new coords
new_coord_array[ii+0] = answer.x;
new_coord_array[ii+1] = answer.y;
new_coord_array[ii+2] = answer.z;
}
/* set the new coordinates and then translate back from the origin */
for(atom_ptr = molecule->atoms, i = 0; atom_ptr; atom_ptr = atom_ptr->next, i++) {
ii = i*3;
atom_ptr->pos[0] = new_coord_array[ii+0];
atom_ptr->pos[1] = new_coord_array[ii+1];
atom_ptr->pos[2] = new_coord_array[ii+2];
atom_ptr->pos[0] += com[0];
atom_ptr->pos[1] += com[1];
atom_ptr->pos[2] += com[2];
}
/* free our temporary array */
free(new_coord_array);
}
/* now with quaternions AH */
void rotate(system_t *system, molecule_t *molecule, pbc_t *pbc, double scale) {
atom_t *atom_ptr;
double u1, u2, u3;
double com[3];
int i, ii, n;
double *new_coord_array;
struct quaternion position_vector, rnd_rotation, rnd_rotation_conjugate, answer;
// create a random rotation
// http://planning.cs.uiuc.edu/node198.html
u1 = get_rand(system);
u2 = get_rand(system);
u3 = get_rand(system);
// simple linear interpolation for adjusting the scale
quaternion_construct_xyzw(&rnd_rotation, scale*sqrt(1-u1)*sin(2*M_PI*u2), scale*sqrt(1-u1)*cos(2*M_PI*u2), scale*sqrt(u1)*sin(2*M_PI*u3), 1-scale+scale*sqrt(u1)*cos(2*M_PI*u3)); /* make a random quaternion */
quaternion_normalize(&rnd_rotation);
quaternion_conjugate(&rnd_rotation, &rnd_rotation_conjugate); /* needed to transform coordinates */
/* count the number of atoms in a molecule, and allocate new coords array */
for (atom_ptr = molecule->atoms, n = 0; atom_ptr; atom_ptr = atom_ptr->next)
++n;
new_coord_array = calloc(n * 3, sizeof(double));
memnullcheck(new_coord_array, n * 3 * sizeof(double), __LINE__ - 1, __FILE__);
/* save the com coordinate */
com[0] = molecule->com[0];
com[1] = molecule->com[1];
com[2] = molecule->com[2];
/* translate the molecule to the origin */
for (atom_ptr = molecule->atoms; atom_ptr; atom_ptr = atom_ptr->next) {
atom_ptr->pos[0] -= com[0];
atom_ptr->pos[1] -= com[1];
atom_ptr->pos[2] -= com[2];
}
/* quaternion multiply */
for (atom_ptr = molecule->atoms, i = 0; atom_ptr; atom_ptr = atom_ptr->next, i++) {
ii = i * 3;
//position_vector = position
quaternion_construct_xyzw(&position_vector, atom_ptr->pos[0], atom_ptr->pos[1], atom_ptr->pos[2], 0.);
//answer = rnd_rotation*(position*rnd_rotation_conjugate)
quaternion_multiplication(&position_vector, &rnd_rotation_conjugate, &answer);
quaternion_multiplication(&rnd_rotation, &answer, &answer);
//set the new coords
new_coord_array[ii + 0] = answer.x;
new_coord_array[ii + 1] = answer.y;
new_coord_array[ii + 2] = answer.z;
}
/* set the new coordinates and then translate back from the origin */
for (atom_ptr = molecule->atoms, i = 0; atom_ptr; atom_ptr = atom_ptr->next, i++) {
ii = i * 3;
atom_ptr->pos[0] = new_coord_array[ii + 0];
atom_ptr->pos[1] = new_coord_array[ii + 1];
atom_ptr->pos[2] = new_coord_array[ii + 2];
atom_ptr->pos[0] += com[0];
atom_ptr->pos[1] += com[1];
atom_ptr->pos[2] += com[2];
}
/* free our temporary array */
free(new_coord_array);
}
/* rotate a molecule about three Euler angles - same as normal function but for a single mol and without random angles */
void molecule_rotate_euler(molecule_t *molecule, double alpha, double beta, double gamma, int reverse_flag) {
atom_t *atom_ptr;
double rotation_matrix[3][3];
double com[3];
int i, ii, n;
double *new_coord_array;
//reverse the rotation?
if (reverse_flag)
{
//switch around alpha and gamma
double temp;
temp = alpha;
alpha = gamma;
gamma = temp;
alpha *= -1.;
beta *= -1.;
gamma *= -1.;
}
/* count the number of atoms in a molecule, and allocate new coords array */
for(atom_ptr = molecule->atoms, n = 0; atom_ptr; atom_ptr = atom_ptr->next)
++n;
new_coord_array = calloc(n*3, sizeof(double));
memnullcheck(new_coord_array,n*3*sizeof(double),__LINE__-1, __FILE__);
/* save the com coordinate */
com[0] = molecule->com[0];
com[1] = molecule->com[1];
com[2] = molecule->com[2];
/* translate the molecule to the origin */
for(atom_ptr = molecule->atoms; atom_ptr; atom_ptr = atom_ptr->next) {
atom_ptr->pos[0] -= com[0];
atom_ptr->pos[1] -= com[1];
atom_ptr->pos[2] -= com[2];
}
/* construct the 3D rotation matrix */
rotation_matrix[0][0] = cos(gamma)*cos(beta)*cos(alpha) - sin(gamma)*sin(alpha);
rotation_matrix[0][1] = sin(gamma)*cos(beta)*cos(alpha) + cos(gamma)*sin(alpha);
rotation_matrix[0][2] = -sin(beta)*cos(alpha);
rotation_matrix[1][0] = -cos(gamma)*cos(beta)*sin(alpha) - sin(gamma)*cos(alpha);
rotation_matrix[1][1] = -sin(gamma)*cos(beta)*sin(alpha) + cos(gamma)*cos(alpha);
rotation_matrix[1][2] = sin(beta)*sin(alpha);
rotation_matrix[2][0] = cos(gamma)*sin(beta);
rotation_matrix[2][1] = sin(gamma)*sin(beta);
rotation_matrix[2][2] = cos(beta);
/* matrix multiply */
for(atom_ptr = molecule->atoms, i = 0; atom_ptr; atom_ptr = atom_ptr->next, i++) {
ii = i*3;
new_coord_array[ii+0] = rotation_matrix[0][0]*atom_ptr->pos[0] + rotation_matrix[0][1]*atom_ptr->pos[1] + rotation_matrix[0][2]*atom_ptr->pos[2];
new_coord_array[ii+1] = rotation_matrix[1][0]*atom_ptr->pos[0] + rotation_matrix[1][1]*atom_ptr->pos[1] + rotation_matrix[1][2]*atom_ptr->pos[2];
new_coord_array[ii+2] = rotation_matrix[2][0]*atom_ptr->pos[0] + rotation_matrix[2][1]*atom_ptr->pos[1] + rotation_matrix[2][2]*atom_ptr->pos[2];
}
/* set the new coordinates and then translate back from the origin */
for(atom_ptr = molecule->atoms, i = 0; atom_ptr; atom_ptr = atom_ptr->next, i++) {
ii = i*3;
atom_ptr->pos[0] = new_coord_array[ii+0];
atom_ptr->pos[1] = new_coord_array[ii+1];
atom_ptr->pos[2] = new_coord_array[ii+2];
atom_ptr->pos[0] += com[0];
atom_ptr->pos[1] += com[1];
atom_ptr->pos[2] += com[2];
}
/* free our temporary array */
free(new_coord_array);
}
/* parallel tempering is treated differently than the other types of MC moves, because it is done
* IN ADDITION to any other moves: i.e. some random move is performed and the energy is calculated
* before and after. once that is all figured out, we then perform a temper step. The boltzmann factor
* that is calculated will NOT be averaged into the BF quantity. It can be, but care must be taken so
* there is no double-counting, and it really isn't so important to do so. */
void temper_system(system_t *system, double current_energy) {
#ifdef MPI
// system->ptemp->index[j] is a mapping from core -> bath_index (bath_index 0 is lowest temperature, etc.)
// bath2core maps from bath_index -> core
// only half of the cores will be responsible for carrying out the calculations
// partner_list maps from core -> swap partner, if core is a master. core -> -1, if core is a slave.
int *bath2core, *partner_list, *is_master, master, slave, *update_index, new_index_val;
double slave_energy, boltzmann_factor, *update_templist, new_templist_val;
int i, j, lucky, accept_move;
MPI_Status status;
slave_energy = 0;
//make the bath index
bath2core = calloc(size, sizeof(int));
memnullcheck(bath2core, size * sizeof(int), __LINE__ - 1, __FILE__);
for (i = 0; i < size; i++)
for (j = 0; j < size; j++)
if (system->ptemp->index[j] == i) bath2core[i] = j;
//choose the lucky bath. it's not really lucky.. this is just the first bath that we consider for swapping
if (!rank) lucky = floor(get_rand(system) * size);
MPI_Bcast(&lucky, 1, MPI_INT, 0, MPI_COMM_WORLD);
//we will use this array to designate whether a particular core is a master or slave
is_master = calloc(size, sizeof(int));
memnullcheck(is_master, size * sizeof(int), __LINE__ - 1, __FILE__);
//build the partner list
partner_list = calloc(size, sizeof(int));
memnullcheck(partner_list, size * sizeof(int), __LINE__ - 1, __FILE__);
master = lucky;
slave = (lucky + 1) % size; //this assigns the slave bath index to the variable
do {
partner_list[bath2core[slave]] = bath2core[master]; //partner_list maps slave to master core
partner_list[bath2core[master]] = bath2core[slave]; //partner_list maps master to slave
is_master[bath2core[master]] = 1; //master flag is on
is_master[bath2core[slave]] = 0; //master flag is off
//now generate the next master
master = (master + 2) % size;
slave = (slave + 2) % size;
} while ((master != lucky) && (slave != lucky));
if (slave == lucky) {
partner_list[bath2core[master]] = -1; //if odd # of cores, we have one member unassigned
is_master[bath2core[master]] = -1; //neither master nor slave
}
//all cores (except 1 if size is odd) are mapped
//communicate the energy to the master nodes
if (!is_master[rank]) {
MPI_Send(¤t_energy, 1, MPI_DOUBLE, partner_list[rank], 0, MPI_COMM_WORLD); //slave sends it's energy
MPI_Recv(&accept_move, 1, MPI_INT, partner_list[rank], 1, MPI_COMM_WORLD, &status); //receive result (accept/reject)
} else if (is_master[rank] == 1) {
//master receives energy from slave
MPI_Recv(&slave_energy, 1, MPI_DOUBLE, partner_list[rank], 0, MPI_COMM_WORLD, &status);
//calculate boltzmann factor exp(dE*dB)
boltzmann_factor = exp((current_energy - slave_energy) *
(1.0 / system->ptemp->templist[rank] - 1.0 / system->ptemp->templist[partner_list[rank]]));
if (get_rand(system) < boltzmann_factor)
accept_move = 1;
else
accept_move = 0;
//communicate the move result to slave
MPI_Send(&accept_move, 1, MPI_INT, partner_list[rank], 1, MPI_COMM_WORLD);
} else
accept_move = 0; //no partner
if (accept_move) {
//reassign local temperature
system->temperature = system->ptemp->templist[partner_list[rank]];
//update our temperature and index values to prepare for transmission to root
new_templist_val = system->ptemp->templist[partner_list[rank]];
new_index_val = system->ptemp->index[partner_list[rank]];
//reassign fugacities
if (!system->user_fugacities && system->fugacities) {
MPI_Send(system->fugacities, 1, MPI_DOUBLE, partner_list[rank], 2, MPI_COMM_WORLD); //send fugacity
MPI_Recv(system->fugacities, 1, MPI_DOUBLE, partner_list[rank], 2, MPI_COMM_WORLD, &status); //receive fugacity
}
} else { //reject
new_templist_val = system->ptemp->templist[rank];
new_index_val = system->ptemp->index[rank];
}
//now we need to update the templist and index on each core
update_templist = calloc(size, sizeof(double));
update_index = calloc(size, sizeof(int));
memnullcheck(update_templist, size * sizeof(double), __LINE__ - 1, __FILE__);
memnullcheck(update_index, size * sizeof(int), __LINE__ - 1, __FILE__);
// create updated arrays on head node
MPI_Gather(&new_templist_val, 1, MPI_DOUBLE, update_templist, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD);
MPI_Gather(&new_index_val, 1, MPI_INT, update_index, 1, MPI_INT, 0, MPI_COMM_WORLD);
// build the updated array
if (!rank) {
for (i = 0; i < size; i++) {
system->ptemp->templist[i] = update_templist[i];
system->ptemp->index[i] = update_index[i];
}
}
// transmit to each core
MPI_Bcast(system->ptemp->templist, size, MPI_DOUBLE, 0, MPI_COMM_WORLD);
MPI_Bcast(system->ptemp->index, size, MPI_INT, 0, MPI_COMM_WORLD);
if (accept_move)
system->nodestats->accept_ptemp++;
else if (is_master[rank] != -1)
system->nodestats->reject_ptemp++;
free(update_templist);
free(update_index);
free(bath2core);
free(is_master);
free(partner_list);
#endif //MPI
return;
}
