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lammps/src/atom.cpp
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atom.cpp
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/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */
#include "mpi.h"
#include "math.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "limits.h"
#include "atom.h"
#include "style_atom.h"
#include "atom_vec.h"
#include "atom_vec_ellipsoid.h"
#include "comm.h"
#include "neighbor.h"
#include "force.h"
#include "modify.h"
#include "fix.h"
#include "output.h"
#include "thermo.h"
#include "update.h"
#include "domain.h"
#include "group.h"
#include "accelerator_cuda.h"
#include "memory.h"
#include "error.h"
using namespace LAMMPS_NS;
#define DELTA 1
#define DELTA_MEMSTR 1024
#define EPSILON 1.0e-6
#define CUDA_CHUNK 3000
/* ---------------------------------------------------------------------- */
Atom::Atom(LAMMPS *lmp) : Pointers(lmp)
{
natoms = 0;
nlocal = nghost = nmax = 0;
ntypes = 0;
nbondtypes = nangletypes = ndihedraltypes = nimpropertypes = 0;
nbonds = nangles = ndihedrals = nimpropers = 0;
bond_per_atom = angle_per_atom = dihedral_per_atom = improper_per_atom = 0;
extra_bond_per_atom = 0;
firstgroupname = NULL;
sortfreq = 1000;
nextsort = 0;
userbinsize = 0.0;
maxbin = maxnext = 0;
binhead = NULL;
next = permute = NULL;
// initialize atom arrays
// customize by adding new array
tag = type = mask = NULL;
image = NULL;
x = v = f = NULL;
molecule = NULL;
q = NULL;
mu = NULL;
omega = angmom = torque = NULL;
radius = rmass = NULL;
vfrac = s0 = NULL;
x0 = NULL;
ellipsoid = line = tri = NULL;
spin = NULL;
eradius = ervel = erforce = NULL;
cs = csforce = vforce = ervelforce = NULL;
etag = NULL;
rho = drho = NULL;
e = de = NULL;
cv = NULL;
vest = NULL;
maxspecial = 1;
nspecial = NULL;
special = NULL;
num_bond = NULL;
bond_type = bond_atom = NULL;
num_angle = NULL;
angle_type = angle_atom1 = angle_atom2 = angle_atom3 = NULL;
num_dihedral = NULL;
dihedral_type = dihedral_atom1 = dihedral_atom2 = NULL;
dihedral_atom3 = dihedral_atom4 = NULL;
num_improper = NULL;
improper_type = improper_atom1 = improper_atom2 = NULL;
improper_atom3 = improper_atom4 = NULL;
// initialize atom style and array existence flags
// customize by adding new flag
sphere_flag = ellipsoid_flag = line_flag = tri_flag = 0;
peri_flag = electron_flag = 0;
wavepacket_flag = sph_flag = 0;
molecule_flag = q_flag = mu_flag = 0;
rmass_flag = radius_flag = omega_flag = torque_flag = angmom_flag = 0;
vfrac_flag = spin_flag = eradius_flag = ervel_flag = erforce_flag = 0;
cs_flag = csforce_flag = vforce_flag = ervelforce_flag= etag_flag = 0;
rho_flag = e_flag = cv_flag = vest_flag = 0;
// ntype-length arrays
mass = NULL;
mass_setflag = NULL;
// callback lists & extra restart info
nextra_grow = nextra_restart = 0;
extra_grow = extra_restart = NULL;
nextra_grow_max = nextra_restart_max = 0;
nextra_store = 0;
extra = NULL;
// default mapping values
tag_enable = 1;
map_style = 0;
map_tag_max = 0;
map_nhash = 0;
smax = 0;
sametag = NULL;
map_array = NULL;
map_bucket = NULL;
map_hash = NULL;
// default atom style = atomic
atom_style = NULL;
avec = NULL;
create_avec("atomic",0,NULL,lmp->suffix);
}
/* ---------------------------------------------------------------------- */
Atom::~Atom()
{
delete [] atom_style;
delete avec;
delete [] firstgroupname;
memory->destroy(binhead);
memory->destroy(next);
memory->destroy(permute);
// delete atom arrays
// customize by adding new array
memory->destroy(tag);
memory->destroy(type);
memory->destroy(mask);
memory->destroy(image);
memory->destroy(x);
memory->destroy(v);
memory->destroy(f);
memory->destroy(q);
memory->destroy(mu);
memory->destroy(omega);
memory->destroy(angmom);
memory->destroy(torque);
memory->destroy(radius);
memory->destroy(rmass);
memory->destroy(vfrac);
memory->destroy(s0);
memory->destroy(x0);
memory->destroy(ellipsoid);
memory->destroy(line);
memory->destroy(tri);
memory->destroy(spin);
memory->destroy(eradius);
memory->destroy(ervel);
memory->destroy(erforce);
memory->destroy(molecule);
memory->destroy(nspecial);
memory->destroy(special);
memory->destroy(num_bond);
memory->destroy(bond_type);
memory->destroy(bond_atom);
memory->destroy(num_angle);
memory->destroy(angle_type);
memory->destroy(angle_atom1);
memory->destroy(angle_atom2);
memory->destroy(angle_atom3);
memory->destroy(num_dihedral);
memory->destroy(dihedral_type);
memory->destroy(dihedral_atom1);
memory->destroy(dihedral_atom2);
memory->destroy(dihedral_atom3);
memory->destroy(dihedral_atom4);
memory->destroy(num_improper);
memory->destroy(improper_type);
memory->destroy(improper_atom1);
memory->destroy(improper_atom2);
memory->destroy(improper_atom3);
memory->destroy(improper_atom4);
// delete per-type arrays
delete [] mass;
delete [] mass_setflag;
// delete extra arrays
memory->destroy(extra_grow);
memory->destroy(extra_restart);
memory->destroy(extra);
// delete mapping data structures
memory->destroy(sametag);
map_delete();
}
/* ----------------------------------------------------------------------
copy modify settings from old Atom class to current Atom class
------------------------------------------------------------------------- */
void Atom::settings(Atom *old)
{
map_style = old->map_style;
}
/* ----------------------------------------------------------------------
create an AtomVec style
called from input script, restart file, replicate
------------------------------------------------------------------------- */
void Atom::create_avec(const char *style, int narg, char **arg, char *suffix)
{
delete [] atom_style;
if (avec) delete avec;
// unset atom style and array existence flags
// may have been set by old avec
// customize by adding new flag
sphere_flag = ellipsoid_flag = line_flag = tri_flag = 0;
peri_flag = electron_flag = 0;
molecule_flag = q_flag = mu_flag = 0;
rmass_flag = radius_flag = omega_flag = torque_flag = angmom_flag = 0;
vfrac_flag = spin_flag = eradius_flag = ervel_flag = erforce_flag = 0;
int sflag;
avec = new_avec(style,narg,arg,suffix,sflag);
if (sflag) {
char estyle[256];
sprintf(estyle,"%s/%s",style,suffix);
int n = strlen(estyle) + 1;
atom_style = new char[n];
strcpy(atom_style,estyle);
} else {
int n = strlen(style) + 1;
atom_style = new char[n];
strcpy(atom_style,style);
}
// if molecular system, default is to have array map
molecular = avec->molecular;
if (map_style == 0 && molecular) map_style = 1;
}
/* ----------------------------------------------------------------------
generate an AtomVec class, first with suffix appended
------------------------------------------------------------------------- */
AtomVec *Atom::new_avec(const char *style, int narg, char **arg,
char *suffix, int &sflag)
{
if (suffix && lmp->suffix_enable) {
sflag = 1;
char estyle[256];
sprintf(estyle,"%s/%s",style,suffix);
if (0) return NULL;
#define ATOM_CLASS
#define AtomStyle(key,Class) \
else if (strcmp(estyle,#key) == 0) return new Class(lmp,narg,arg);
#include "style_atom.h"
#undef AtomStyle
#undef ATOM_CLASS
}
sflag = 0;
if (0) return NULL;
#define ATOM_CLASS
#define AtomStyle(key,Class) \
else if (strcmp(style,#key) == 0) return new Class(lmp,narg,arg);
#include "style_atom.h"
#undef ATOM_CLASS
else error->all(FLERR,"Invalid atom style");
return NULL;
}
/* ---------------------------------------------------------------------- */
void Atom::init()
{
// delete extra array since it doesn't persist past first run
if (nextra_store) {
memory->destroy(extra);
extra = NULL;
nextra_store = 0;
}
// check arrays that are atom type in length
check_mass();
// setup of firstgroup
if (firstgroupname) {
firstgroup = group->find(firstgroupname);
if (firstgroup < 0)
error->all(FLERR,"Could not find atom_modify first group ID");
} else firstgroup = -1;
// init AtomVec
avec->init();
}
/* ---------------------------------------------------------------------- */
void Atom::setup()
{
// setup bins for sorting
// cannot do this in init() because uses neighbor cutoff
if (sortfreq > 0) setup_sort_bins();
}
/* ----------------------------------------------------------------------
return ptr to AtomVec class if matches style or to matching hybrid sub-class
return NULL if no match
------------------------------------------------------------------------- */
AtomVec *Atom::style_match(const char *style)
{
if (strcmp(atom_style,style) == 0) return avec;
else if (strcmp(atom_style,"hybrid") == 0) {
AtomVecHybrid *avec_hybrid = (AtomVecHybrid *) avec;
for (int i = 0; i < avec_hybrid->nstyles; i++)
if (strcmp(avec_hybrid->keywords[i],style) == 0)
return avec_hybrid->styles[i];
}
return NULL;
}
/* ----------------------------------------------------------------------
modify parameters of the atom style
some options can only be invoked before simulation box is defined
first and sort options cannot be used together
------------------------------------------------------------------------- */
void Atom::modify_params(int narg, char **arg)
{
if (narg == 0) error->all(FLERR,"Illegal atom_modify command");
int iarg = 0;
while (iarg < narg) {
if (strcmp(arg[iarg],"map") == 0) {
if (iarg+2 > narg) error->all(FLERR,"Illegal atom_modify command");
if (strcmp(arg[iarg+1],"array") == 0) map_style = 1;
else if (strcmp(arg[iarg+1],"hash") == 0) map_style = 2;
else error->all(FLERR,"Illegal atom_modify command");
if (domain->box_exist)
error->all(FLERR,
"Atom_modify map command after simulation box is defined");
iarg += 2;
} else if (strcmp(arg[iarg],"first") == 0) {
if (iarg+2 > narg) error->all(FLERR,"Illegal atom_modify command");
if (strcmp(arg[iarg+1],"all") == 0) {
delete [] firstgroupname;
firstgroupname = NULL;
} else {
int n = strlen(arg[iarg+1]) + 1;
firstgroupname = new char[n];
strcpy(firstgroupname,arg[iarg+1]);
sortfreq = 0;
}
iarg += 2;
} else if (strcmp(arg[iarg],"sort") == 0) {
if (iarg+3 > narg) error->all(FLERR,"Illegal atom_modify command");
sortfreq = atoi(arg[iarg+1]);
userbinsize = atof(arg[iarg+2]);
if (sortfreq < 0 || userbinsize < 0.0)
error->all(FLERR,"Illegal atom_modify command");
if (sortfreq >= 0 && firstgroupname)
error->all(FLERR,"Atom_modify sort and first options "
"cannot be used together");
iarg += 3;
} else error->all(FLERR,"Illegal atom_modify command");
}
}
/* ----------------------------------------------------------------------
add unique tags to any atoms with tag = 0
new tags are grouped by proc and start after max current tag
called after creating new atoms
------------------------------------------------------------------------- */
void Atom::tag_extend()
{
// maxtag_all = max tag for all atoms
int maxtag = 0;
for (int i = 0; i < nlocal; i++) maxtag = MAX(maxtag,tag[i]);
int maxtag_all;
MPI_Allreduce(&maxtag,&maxtag_all,1,MPI_INT,MPI_MAX,world);
// notag = # of atoms I own with no tag (tag = 0)
// notag_sum = # of total atoms on procs <= me with no tag
int notag = 0;
for (int i = 0; i < nlocal; i++) if (tag[i] == 0) notag++;
int notag_sum;
MPI_Scan(&notag,&notag_sum,1,MPI_INT,MPI_SUM,world);
// itag = 1st new tag that my untagged atoms should use
int itag = maxtag_all + notag_sum - notag + 1;
for (int i = 0; i < nlocal; i++) if (tag[i] == 0) tag[i] = itag++;
}
/* ----------------------------------------------------------------------
check that atom IDs span range from 1 to Natoms
return 0 if mintag != 1 or maxtag != Natoms
return 1 if OK
doesn't actually check if all tag values are used
------------------------------------------------------------------------- */
int Atom::tag_consecutive()
{
// change this when allow tagint = bigint
//int idmin = MAXTAGINT;
int idmin = MAXSMALLINT;
int idmax = 0;
for (int i = 0; i < nlocal; i++) {
idmin = MIN(idmin,tag[i]);
idmax = MAX(idmax,tag[i]);
}
int idminall,idmaxall;
MPI_Allreduce(&idmin,&idminall,1,MPI_INT,MPI_MIN,world);
MPI_Allreduce(&idmax,&idmaxall,1,MPI_INT,MPI_MAX,world);
if (idminall != 1 || idmaxall != static_cast<int> (natoms)) return 0;
return 1;
}
/* ----------------------------------------------------------------------
count and return words in a single line
make copy of line before using strtok so as not to change line
trim anything from '#' onward
------------------------------------------------------------------------- */
int Atom::count_words(const char *line)
{
int n = strlen(line) + 1;
char *copy;
memory->create(copy,n,"atom:copy");
strcpy(copy,line);
char *ptr;
if (ptr = strchr(copy,'#')) *ptr = '\0';
if (strtok(copy," \t\n\r\f") == NULL) {
memory->destroy(copy);
return 0;
}
n = 1;
while (strtok(NULL," \t\n\r\f")) n++;
memory->destroy(copy);
return n;
}
/* ----------------------------------------------------------------------
unpack n lines from Atom section of data file
call style-specific routine to parse line
------------------------------------------------------------------------- */
void Atom::data_atoms(int n, char *buf)
{
int m,xptr,iptr;
tagint imagedata;
double xdata[3],lamda[3];
double *coord;
char *next;
next = strchr(buf,'\n');
*next = '\0';
int nwords = count_words(buf);
*next = '\n';
if (nwords != avec->size_data_atom && nwords != avec->size_data_atom + 3)
error->all(FLERR,"Incorrect atom format in data file");
char **values = new char*[nwords];
// set bounds for my proc
// if periodic and I am lo/hi proc, adjust bounds by EPSILON
// insures all data atoms will be owned even with round-off
int triclinic = domain->triclinic;
double epsilon[3];
if (triclinic) epsilon[0] = epsilon[1] = epsilon[2] = EPSILON;
else {
epsilon[0] = domain->prd[0] * EPSILON;
epsilon[1] = domain->prd[1] * EPSILON;
epsilon[2] = domain->prd[2] * EPSILON;
}
double sublo[3],subhi[3];
if (triclinic == 0) {
sublo[0] = domain->sublo[0]; subhi[0] = domain->subhi[0];
sublo[1] = domain->sublo[1]; subhi[1] = domain->subhi[1];
sublo[2] = domain->sublo[2]; subhi[2] = domain->subhi[2];
} else {
sublo[0] = domain->sublo_lamda[0]; subhi[0] = domain->subhi_lamda[0];
sublo[1] = domain->sublo_lamda[1]; subhi[1] = domain->subhi_lamda[1];
sublo[2] = domain->sublo_lamda[2]; subhi[2] = domain->subhi_lamda[2];
}
if (domain->xperiodic) {
if (comm->myloc[0] == 0) sublo[0] -= epsilon[0];
if (comm->myloc[0] == comm->procgrid[0]-1) subhi[0] += epsilon[0];
}
if (domain->yperiodic) {
if (comm->myloc[1] == 0) sublo[1] -= epsilon[1];
if (comm->myloc[1] == comm->procgrid[1]-1) subhi[1] += epsilon[1];
}
if (domain->zperiodic) {
if (comm->myloc[2] == 0) sublo[2] -= epsilon[2];
if (comm->myloc[2] == comm->procgrid[2]-1) subhi[2] += epsilon[2];
}
// xptr = which word in line starts xyz coords
// iptr = which word in line starts ix,iy,iz image flags
xptr = avec->xcol_data - 1;
int imageflag = 0;
if (nwords > avec->size_data_atom) imageflag = 1;
if (imageflag) iptr = nwords - 3;
// loop over lines of atom data
// tokenize the line into values
// extract xyz coords and image flags
// remap atom into simulation box
// if atom is in my sub-domain, unpack its values
for (int i = 0; i < n; i++) {
next = strchr(buf,'\n');
values[0] = strtok(buf," \t\n\r\f");
if (values[0] == NULL)
error->all(FLERR,"Incorrect atom format in data file");
for (m = 1; m < nwords; m++) {
values[m] = strtok(NULL," \t\n\r\f");
if (values[m] == NULL)
error->all(FLERR,"Incorrect atom format in data file");
}
if (imageflag)
imagedata =
(((tagint) atoi(values[iptr+2]) + IMGMAX & IMGMASK) << IMG2BITS) |
(((tagint) atoi(values[iptr+1]) + IMGMAX & IMGMASK) << IMGBITS) |
(atoi(values[iptr]) + IMGMASK & IMGMASK);
else imagedata = ((tagint) IMGMAX << IMG2BITS) |
((tagint) IMGMAX << IMGBITS) | IMGMAX;
xdata[0] = atof(values[xptr]);
xdata[1] = atof(values[xptr+1]);
xdata[2] = atof(values[xptr+2]);
domain->remap(xdata,imagedata);
if (triclinic) {
domain->x2lamda(xdata,lamda);
coord = lamda;
} else coord = xdata;
if (coord[0] >= sublo[0] && coord[0] < subhi[0] &&
coord[1] >= sublo[1] && coord[1] < subhi[1] &&
coord[2] >= sublo[2] && coord[2] < subhi[2])
avec->data_atom(xdata,imagedata,values);
buf = next + 1;
}
delete [] values;
}
/* ----------------------------------------------------------------------
unpack n lines from Velocity section of data file
check that atom IDs are > 0 and <= map_tag_max
call style-specific routine to parse line
------------------------------------------------------------------------- */
void Atom::data_vels(int n, char *buf)
{
int j,m,tagdata;
char *next;
next = strchr(buf,'\n');
*next = '\0';
int nwords = count_words(buf);
*next = '\n';
if (nwords != avec->size_data_vel)
error->all(FLERR,"Incorrect velocity format in data file");
char **values = new char*[nwords];
// loop over lines of atom velocities
// tokenize the line into values
// if I own atom tag, unpack its values
for (int i = 0; i < n; i++) {
next = strchr(buf,'\n');
values[0] = strtok(buf," \t\n\r\f");
for (j = 1; j < nwords; j++)
values[j] = strtok(NULL," \t\n\r\f");
tagdata = atoi(values[0]);
if (tagdata <= 0 || tagdata > map_tag_max)
error->one(FLERR,"Invalid atom ID in Velocities section of data file");
if ((m = map(tagdata)) >= 0) avec->data_vel(m,&values[1]);
buf = next + 1;
}
delete [] values;
}
/* ----------------------------------------------------------------------
unpack n lines from atom-style specific section of data file
check that atom IDs are > 0 and <= map_tag_max
call style-specific routine to parse line
------------------------------------------------------------------------- */
void Atom::data_bonus(int n, char *buf, AtomVec *avec_bonus)
{
int j,m,tagdata;
char *next;
next = strchr(buf,'\n');
*next = '\0';
int nwords = count_words(buf);
*next = '\n';
if (nwords != avec_bonus->size_data_bonus)
error->all(FLERR,"Incorrect bonus data format in data file");
char **values = new char*[nwords];
// loop over lines of bonus atom data
// tokenize the line into values
// if I own atom tag, unpack its values
for (int i = 0; i < n; i++) {
next = strchr(buf,'\n');
values[0] = strtok(buf," \t\n\r\f");
for (j = 1; j < nwords; j++)
values[j] = strtok(NULL," \t\n\r\f");
tagdata = atoi(values[0]);
if (tagdata <= 0 || tagdata > map_tag_max)
error->one(FLERR,"Invalid atom ID in Bonus section of data file");
// ok to call child's data_atom_bonus() method thru parent avec_bonus,
// since data_bonus() was called with child ptr, and method is virtual
if ((m = map(tagdata)) >= 0) avec_bonus->data_atom_bonus(m,&values[1]);
buf = next + 1;
}
delete [] values;
}
/* ----------------------------------------------------------------------
check that atom IDs are > 0 and <= map_tag_max
------------------------------------------------------------------------- */
void Atom::data_bonds(int n, char *buf)
{
int m,tmp,itype,atom1,atom2;
char *next;
int newton_bond = force->newton_bond;
for (int i = 0; i < n; i++) {
next = strchr(buf,'\n');
*next = '\0';
sscanf(buf,"%d %d %d %d",&tmp,&itype,&atom1,&atom2);
if (atom1 <= 0 || atom1 > map_tag_max ||
atom2 <= 0 || atom2 > map_tag_max)
error->one(FLERR,"Invalid atom ID in Bonds section of data file");
if (itype <= 0 || itype > nbondtypes)
error->one(FLERR,"Invalid bond type in Bonds section of data file");
if ((m = map(atom1)) >= 0) {
bond_type[m][num_bond[m]] = itype;
bond_atom[m][num_bond[m]] = atom2;
num_bond[m]++;
}
if (newton_bond == 0) {
if ((m = map(atom2)) >= 0) {
bond_type[m][num_bond[m]] = itype;
bond_atom[m][num_bond[m]] = atom1;
num_bond[m]++;
}
}
buf = next + 1;
}
}
/* ----------------------------------------------------------------------
check that atom IDs are > 0 and <= map_tag_max
------------------------------------------------------------------------- */
void Atom::data_angles(int n, char *buf)
{
int m,tmp,itype,atom1,atom2,atom3;
char *next;
int newton_bond = force->newton_bond;
for (int i = 0; i < n; i++) {
next = strchr(buf,'\n');
*next = '\0';
sscanf(buf,"%d %d %d %d %d",&tmp,&itype,&atom1,&atom2,&atom3);
if (atom1 <= 0 || atom1 > map_tag_max ||
atom2 <= 0 || atom2 > map_tag_max ||
atom3 <= 0 || atom3 > map_tag_max)
error->one(FLERR,"Invalid atom ID in Angles section of data file");
if (itype <= 0 || itype > nangletypes)
error->one(FLERR,"Invalid angle type in Angles section of data file");
if ((m = map(atom2)) >= 0) {
angle_type[m][num_angle[m]] = itype;
angle_atom1[m][num_angle[m]] = atom1;
angle_atom2[m][num_angle[m]] = atom2;
angle_atom3[m][num_angle[m]] = atom3;
num_angle[m]++;
}
if (newton_bond == 0) {
if ((m = map(atom1)) >= 0) {
angle_type[m][num_angle[m]] = itype;
angle_atom1[m][num_angle[m]] = atom1;
angle_atom2[m][num_angle[m]] = atom2;
angle_atom3[m][num_angle[m]] = atom3;
num_angle[m]++;
}
if ((m = map(atom3)) >= 0) {
angle_type[m][num_angle[m]] = itype;
angle_atom1[m][num_angle[m]] = atom1;
angle_atom2[m][num_angle[m]] = atom2;
angle_atom3[m][num_angle[m]] = atom3;
num_angle[m]++;
}
}
buf = next + 1;
}
}
/* ----------------------------------------------------------------------
check that atom IDs are > 0 and <= map_tag_max
------------------------------------------------------------------------- */
void Atom::data_dihedrals(int n, char *buf)
{
int m,tmp,itype,atom1,atom2,atom3,atom4;
char *next;
int newton_bond = force->newton_bond;
for (int i = 0; i < n; i++) {
next = strchr(buf,'\n');
*next = '\0';
sscanf(buf,"%d %d %d %d %d %d",&tmp,&itype,&atom1,&atom2,&atom3,&atom4);
if (atom1 <= 0 || atom1 > map_tag_max ||
atom2 <= 0 || atom2 > map_tag_max ||
atom3 <= 0 || atom3 > map_tag_max ||
atom4 <= 0 || atom4 > map_tag_max)
error->one(FLERR,"Invalid atom ID in Dihedrals section of data file");
if (itype <= 0 || itype > ndihedraltypes)
error->one(FLERR,
"Invalid dihedral type in Dihedrals section of data file");
if ((m = map(atom2)) >= 0) {
dihedral_type[m][num_dihedral[m]] = itype;
dihedral_atom1[m][num_dihedral[m]] = atom1;
dihedral_atom2[m][num_dihedral[m]] = atom2;
dihedral_atom3[m][num_dihedral[m]] = atom3;
dihedral_atom4[m][num_dihedral[m]] = atom4;
num_dihedral[m]++;
}
if (newton_bond == 0) {
if ((m = map(atom1)) >= 0) {
dihedral_type[m][num_dihedral[m]] = itype;
dihedral_atom1[m][num_dihedral[m]] = atom1;
dihedral_atom2[m][num_dihedral[m]] = atom2;
dihedral_atom3[m][num_dihedral[m]] = atom3;
dihedral_atom4[m][num_dihedral[m]] = atom4;
num_dihedral[m]++;
}
if ((m = map(atom3)) >= 0) {
dihedral_type[m][num_dihedral[m]] = itype;
dihedral_atom1[m][num_dihedral[m]] = atom1;
dihedral_atom2[m][num_dihedral[m]] = atom2;
dihedral_atom3[m][num_dihedral[m]] = atom3;
dihedral_atom4[m][num_dihedral[m]] = atom4;
num_dihedral[m]++;
}
if ((m = map(atom4)) >= 0) {
dihedral_type[m][num_dihedral[m]] = itype;
dihedral_atom1[m][num_dihedral[m]] = atom1;
dihedral_atom2[m][num_dihedral[m]] = atom2;
dihedral_atom3[m][num_dihedral[m]] = atom3;
dihedral_atom4[m][num_dihedral[m]] = atom4;
num_dihedral[m]++;
}
}
buf = next + 1;
}
}
/* ----------------------------------------------------------------------
check that atom IDs are > 0 and <= map_tag_max
------------------------------------------------------------------------- */
void Atom::data_impropers(int n, char *buf)
{
int m,tmp,itype,atom1,atom2,atom3,atom4;
char *next;
int newton_bond = force->newton_bond;
for (int i = 0; i < n; i++) {
next = strchr(buf,'\n');
*next = '\0';
sscanf(buf,"%d %d %d %d %d %d",&tmp,&itype,&atom1,&atom2,&atom3,&atom4);
if (atom1 <= 0 || atom1 > map_tag_max ||
atom2 <= 0 || atom2 > map_tag_max ||
atom3 <= 0 || atom3 > map_tag_max ||
atom4 <= 0 || atom4 > map_tag_max)
error->one(FLERR,"Invalid atom ID in Impropers section of data file");
if (itype <= 0 || itype > nimpropertypes)
error->one(FLERR,
"Invalid improper type in Impropers section of data file");
if ((m = map(atom2)) >= 0) {
improper_type[m][num_improper[m]] = itype;
improper_atom1[m][num_improper[m]] = atom1;
improper_atom2[m][num_improper[m]] = atom2;
improper_atom3[m][num_improper[m]] = atom3;
improper_atom4[m][num_improper[m]] = atom4;
num_improper[m]++;
}
if (newton_bond == 0) {
if ((m = map(atom1)) >= 0) {
improper_type[m][num_improper[m]] = itype;
improper_atom1[m][num_improper[m]] = atom1;
improper_atom2[m][num_improper[m]] = atom2;
improper_atom3[m][num_improper[m]] = atom3;
improper_atom4[m][num_improper[m]] = atom4;
num_improper[m]++;
}
if ((m = map(atom3)) >= 0) {
improper_type[m][num_improper[m]] = itype;
improper_atom1[m][num_improper[m]] = atom1;
improper_atom2[m][num_improper[m]] = atom2;
improper_atom3[m][num_improper[m]] = atom3;
improper_atom4[m][num_improper[m]] = atom4;
num_improper[m]++;
}
if ((m = map(atom4)) >= 0) {
improper_type[m][num_improper[m]] = itype;
improper_atom1[m][num_improper[m]] = atom1;
improper_atom2[m][num_improper[m]] = atom2;
improper_atom3[m][num_improper[m]] = atom3;
improper_atom4[m][num_improper[m]] = atom4;
num_improper[m]++;
}
}
buf = next + 1;
}
}
/* ----------------------------------------------------------------------
allocate arrays of length ntypes
only done after ntypes is set
------------------------------------------------------------------------- */
void Atom::allocate_type_arrays()
{
if (avec->mass_type) {
mass = new double[ntypes+1];
mass_setflag = new int[ntypes+1];
for (int itype = 1; itype <= ntypes; itype++) mass_setflag[itype] = 0;
}
}
/* ----------------------------------------------------------------------
set a mass and flag it as set
called from reading of data file
------------------------------------------------------------------------- */
void Atom::set_mass(const char *str)
{
if (mass == NULL) error->all(FLERR,"Cannot set mass for this atom style");
int itype;
double mass_one;
int n = sscanf(str,"%d %lg",&itype,&mass_one);
if (n != 2) error->all(FLERR,"Invalid mass line in data file");
if (itype < 1 || itype > ntypes)
error->all(FLERR,"Invalid type for mass set");
mass[itype] = mass_one;
mass_setflag[itype] = 1;
if (mass[itype] <= 0.0) error->all(FLERR,"Invalid mass value");
}
/* ----------------------------------------------------------------------
set a mass and flag it as set
called from EAM pair routine
------------------------------------------------------------------------- */
void Atom::set_mass(int itype, double value)
{
if (mass == NULL) error->all(FLERR,"Cannot set mass for this atom style");
if (itype < 1 || itype > ntypes)
error->all(FLERR,"Invalid type for mass set");
mass[itype] = value;
mass_setflag[itype] = 1;
if (mass[itype] <= 0.0) error->all(FLERR,"Invalid mass value");
}
/* ----------------------------------------------------------------------
set one or more masses and flag them as set
called from reading of input script
------------------------------------------------------------------------- */
void Atom::set_mass(int narg, char **arg)
{
if (mass == NULL) error->all(FLERR,"Cannot set mass for this atom style");
int lo,hi;
force->bounds(arg[0],ntypes,lo,hi);
if (lo < 1 || hi > ntypes) error->all(FLERR,"Invalid type for mass set");
for (int itype = lo; itype <= hi; itype++) {
mass[itype] = atof(arg[1]);
mass_setflag[itype] = 1;
if (mass[itype] <= 0.0) error->all(FLERR,"Invalid mass value");
}
}
/* ----------------------------------------------------------------------
set all masses as read in from restart file
------------------------------------------------------------------------- */
void Atom::set_mass(double *values)
{
for (int itype = 1; itype <= ntypes; itype++) {
mass[itype] = values[itype];
mass_setflag[itype] = 1;
}
}
/* ----------------------------------------------------------------------
check that all masses have been set
------------------------------------------------------------------------- */
void Atom::check_mass()
{
if (mass == NULL) return;
for (int itype = 1; itype <= ntypes; itype++)
if (mass_setflag[itype] == 0) error->all(FLERR,"All masses are not set");
}
/* ----------------------------------------------------------------------
check that radii of all particles of itype are the same
return 1 if true, else return 0
also return the radius value for that type
------------------------------------------------------------------------- */
int Atom::radius_consistency(int itype, double &rad)
{
double value = -1.0;
int flag = 0;
for (int i = 0; i < nlocal; i++) {
if (type[i] != itype) continue;
if (value < 0.0) value = radius[i];
else if (value != radius[i]) flag = 1;
}
int flagall;
MPI_Allreduce(&flag,&flagall,1,MPI_INT,MPI_SUM,world);
if (flagall) return 0;
MPI_Allreduce(&value,&rad,1,MPI_DOUBLE,MPI_MAX,world);
return 1;
}
/* ----------------------------------------------------------------------
check that shape of all particles of itype are the same
return 1 if true, else return 0
also return the 3 shape params for itype
------------------------------------------------------------------------- */
int Atom::shape_consistency(int itype,
double &shapex, double &shapey, double &shapez)
{
double zero[3] = {0.0, 0.0, 0.0};
double one[3] = {-1.0, -1.0, -1.0};
double *shape;
AtomVecEllipsoid *avec_ellipsoid =
(AtomVecEllipsoid *) style_match("ellipsoid");
AtomVecEllipsoid::Bonus *bonus = avec_ellipsoid->bonus;
int flag = 0;
for (int i = 0; i < nlocal; i++) {
if (type[i] != itype) continue;
if (ellipsoid[i] < 0) shape = zero;
else shape = bonus[ellipsoid[i]].shape;
if (one[0] < 0.0) {
one[0] = shape[0];
one[1] = shape[1];
one[2] = shape[2];
} else if (one[0] != shape[0] || one[1] != shape[1] || one[2] != shape[2])
flag = 1;
}
int flagall;
MPI_Allreduce(&flag,&flagall,1,MPI_INT,MPI_SUM,world);
if (flagall) return 0;
double oneall[3];
MPI_Allreduce(one,oneall,3,MPI_DOUBLE,MPI_MAX,world);
shapex = oneall[0];
shapey = oneall[1];
shapez = oneall[2];
return 1;
}
/* ----------------------------------------------------------------------
reorder owned atoms so those in firstgroup appear first
called by comm->exchange() if atom_modify first group is set
only owned atoms exist at this point, no ghost atoms
------------------------------------------------------------------------- */
void Atom::first_reorder()
{
// insure there is one extra atom location at end of arrays for swaps
if (nlocal == nmax) avec->grow(0);
// loop over owned atoms
// nfirst = index of first atom not in firstgroup
// when find firstgroup atom out of place, swap it with atom nfirst
int bitmask = group->bitmask[firstgroup];
nfirst = 0;
while (nfirst < nlocal && mask[nfirst] & bitmask) nfirst++;
for (int i = 0; i < nlocal; i++) {
if (mask[i] & bitmask && i > nfirst) {
avec->copy(i,nlocal,0);
avec->copy(nfirst,i,0);
avec->copy(nlocal,nfirst,0);
while (nfirst < nlocal && mask[nfirst] & bitmask) nfirst++;
}
}
}
/* ----------------------------------------------------------------------
perform spatial sort of atoms within my sub-domain
always called between comm->exchange() and comm->borders()
don't have to worry about clearing/setting atom->map since done in comm
------------------------------------------------------------------------- */
void Atom::sort()
{
int i,m,n,ix,iy,iz,ibin,empty;
// set next timestep for sorting to take place
nextsort = (update->ntimestep/sortfreq)*sortfreq + sortfreq;
// download data from GPU if necessary
if (lmp->cuda && !lmp->cuda->oncpu) lmp->cuda->downloadAll();
// re-setup sort bins if needed
if (domain->box_change) setup_sort_bins();
if (nbins == 1) return;
// reallocate per-atom vectors if needed
if (nlocal > maxnext) {
memory->destroy(next);
memory->destroy(permute);
maxnext = atom->nmax;
memory->create(next,maxnext,"atom:next");
memory->create(permute,maxnext,"atom:permute");
}
// insure there is one extra atom location at end of arrays for swaps
if (nlocal == nmax) avec->grow(0);
// bin atoms in reverse order so linked list will be in forward order
for (i = 0; i < nbins; i++) binhead[i] = -1;
for (i = nlocal-1; i >= 0; i--) {
ix = static_cast<int> ((x[i][0]-bboxlo[0])*bininvx);
iy = static_cast<int> ((x[i][1]-bboxlo[1])*bininvy);
iz = static_cast<int> ((x[i][2]-bboxlo[2])*bininvz);
ix = MAX(ix,0);
iy = MAX(iy,0);
iz = MAX(iz,0);
ix = MIN(ix,nbinx-1);
iy = MIN(iy,nbiny-1);
iz = MIN(iz,nbinz-1);
ibin = iz*nbiny*nbinx + iy*nbinx + ix;
next[i] = binhead[ibin];
binhead[ibin] = i;
}
// permute = desired permutation of atoms
// permute[I] = J means Ith new atom will be Jth old atom
n = 0;
for (m = 0; m < nbins; m++) {
i = binhead[m];
while (i >= 0) {
permute[n++] = i;
i = next[i];
}
}
// current = current permutation, just reuse next vector
// current[I] = J means Ith current atom is Jth old atom
int *current = next;
for (i = 0; i < nlocal; i++) current[i] = i;
// reorder local atom list, when done, current = permute
// perform "in place" using copy() to extra atom location at end of list
// inner while loop processes one cycle of the permutation
// copy before inner-loop moves an atom to end of atom list
// copy after inner-loop moves atom at end of list back into list
// empty = location in atom list that is currently empty
for (i = 0; i < nlocal; i++) {
if (current[i] == permute[i]) continue;
avec->copy(i,nlocal,0);
empty = i;
while (permute[empty] != i) {
avec->copy(permute[empty],empty,0);
empty = current[empty] = permute[empty];
}
avec->copy(nlocal,empty,0);
current[empty] = permute[empty];
}
// upload data back to GPU if necessary
if (lmp->cuda && !lmp->cuda->oncpu) lmp->cuda->uploadAll();
// sanity check that current = permute
//int flag = 0;
//for (i = 0; i < nlocal; i++)
// if (current[i] != permute[i]) flag = 1;
//int flagall;
//MPI_Allreduce(&flag,&flagall,1,MPI_INT,MPI_SUM,world);
//if (flagall) error->all(FLERR,"Atom sort did not operate correctly");
}
/* ----------------------------------------------------------------------
setup bins for spatial sorting of atoms
------------------------------------------------------------------------- */
void Atom::setup_sort_bins()
{
// binsize:
// user setting if explicitly set
// 1/2 of neighbor cutoff for non-CUDA
// CUDA_CHUNK atoms/proc for CUDA
// check if neighbor cutoff = 0.0
double binsize;
if (userbinsize > 0.0) binsize = userbinsize;
else if (!lmp->cuda) binsize = 0.5 * neighbor->cutneighmax;
else {
if (domain->dimension == 3) {
double vol = (domain->boxhi[0]-domain->boxlo[0]) *
(domain->boxhi[1]-domain->boxlo[1]) *
(domain->boxhi[2]-domain->boxlo[2]);
binsize = pow(1.0*CUDA_CHUNK/natoms*vol,1.0/3.0);
} else {
double area = (domain->boxhi[0]-domain->boxlo[0]) *
(domain->boxhi[1]-domain->boxlo[1]);
binsize = pow(1.0*CUDA_CHUNK/natoms*area,1.0/2.0);
}
}
if (binsize == 0.0) error->all(FLERR,"Atom sorting has bin size = 0.0");
double bininv = 1.0/binsize;
// nbin xyz = local bins
// bbox lo/hi = bounding box of my sub-domain
if (domain->triclinic)
domain->bbox(domain->sublo_lamda,domain->subhi_lamda,bboxlo,bboxhi);
else {
bboxlo[0] = domain->sublo[0];
bboxlo[1] = domain->sublo[1];
bboxlo[2] = domain->sublo[2];
bboxhi[0] = domain->subhi[0];
bboxhi[1] = domain->subhi[1];
bboxhi[2] = domain->subhi[2];
}
nbinx = static_cast<int> ((bboxhi[0]-bboxlo[0]) * bininv);
nbiny = static_cast<int> ((bboxhi[1]-bboxlo[1]) * bininv);
nbinz = static_cast<int> ((bboxhi[2]-bboxlo[2]) * bininv);
if (domain->dimension == 2) nbinz = 1;
if (nbinx == 0) nbinx = 1;
if (nbiny == 0) nbiny = 1;
if (nbinz == 0) nbinz = 1;
bininvx = nbinx / (bboxhi[0]-bboxlo[0]);
bininvy = nbiny / (bboxhi[1]-bboxlo[1]);
bininvz = nbinz / (bboxhi[2]-bboxlo[2]);
if (1.0*nbinx*nbiny*nbinz > INT_MAX)
error->one(FLERR,"Too many atom sorting bins");
nbins = nbinx*nbiny*nbinz;
// reallocate per-bin memory if needed
if (nbins > maxbin) {
memory->destroy(binhead);
maxbin = nbins;
memory->create(binhead,maxbin,"atom:binhead");
}
}
/* ----------------------------------------------------------------------
register a callback to a fix so it can manage atom-based arrays
happens when fix is created
flag = 0 for grow, 1 for restart
------------------------------------------------------------------------- */
void Atom::add_callback(int flag)
{
int ifix;
// find the fix
// if find NULL ptr:
// it's this one, since it is being replaced and has just been deleted
// at this point in re-creation
// if don't find NULL ptr:
// i is set to nfix = new one currently being added at end of list
for (ifix = 0; ifix < modify->nfix; ifix++)
if (modify->fix[ifix] == NULL) break;
// add callback to lists, reallocating if necessary
if (flag == 0) {
if (nextra_grow == nextra_grow_max) {
nextra_grow_max += DELTA;
memory->grow(extra_grow,nextra_grow_max,"atom:extra_grow");
}
extra_grow[nextra_grow] = ifix;
nextra_grow++;
} else if (flag == 1) {
if (nextra_restart == nextra_restart_max) {
nextra_restart_max += DELTA;
memory->grow(extra_restart,nextra_restart_max,"atom:extra_restart");
}
extra_restart[nextra_restart] = ifix;
nextra_restart++;
}
}
/* ----------------------------------------------------------------------
unregister a callback to a fix
happens when fix is deleted, called by its destructor
flag = 0 for grow, 1 for restart
------------------------------------------------------------------------- */
void Atom::delete_callback(const char *id, int flag)
{
int ifix;
for (ifix = 0; ifix < modify->nfix; ifix++)
if (strcmp(id,modify->fix[ifix]->id) == 0) break;
// compact the list of callbacks
if (flag == 0) {
int match;
for (match = 0; match < nextra_grow; match++)
if (extra_grow[match] == ifix) break;
for (int i = match; i < nextra_grow-1; i++)
extra_grow[i] = extra_grow[i+1];
nextra_grow--;
} else if (flag == 1) {
int match;
for (match = 0; match < nextra_grow; match++)
if (extra_restart[match] == ifix) break;
for (int i = ifix; i < nextra_restart-1; i++)
extra_restart[i] = extra_restart[i+1];
nextra_restart--;
}
}
/* ----------------------------------------------------------------------
decrement ptrs in callback lists to fixes beyond the deleted ifix
happens after fix is deleted
------------------------------------------------------------------------- */
void Atom::update_callback(int ifix)
{
for (int i = 0; i < nextra_grow; i++)
if (extra_grow[i] > ifix) extra_grow[i]--;
for (int i = 0; i < nextra_restart; i++)
if (extra_restart[i] > ifix) extra_restart[i]--;
}
/* ----------------------------------------------------------------------
return a pointer to a named internal variable
if don't recognize name, return NULL
customize by adding names
------------------------------------------------------------------------- */
void *Atom::extract(char *name)
{
if (strcmp(name,"id") == 0) return (void *) tag;
if (strcmp(name,"type") == 0) return (void *) type;
if (strcmp(name,"mask") == 0) return (void *) mask;
if (strcmp(name,"x") == 0) return (void *) x;
if (strcmp(name,"v") == 0) return (void *) v;
if (strcmp(name,"f") == 0) return (void *) f;
if (strcmp(name,"mass") == 0) return (void *) mass;
if (strcmp(name,"rmass") == 0) return (void *) rmass;
return NULL;
}
/* ----------------------------------------------------------------------
return # of bytes of allocated memory
call to avec tallies per-atom vectors
add in global to local mapping storage
------------------------------------------------------------------------- */
bigint Atom::memory_usage()
{
memlength = DELTA_MEMSTR;
memory->create(memstr,memlength,"atom:memstr");
memstr[0] = '\0';
bigint bytes = avec->memory_usage();
memory->destroy(memstr);
bytes += smax*sizeof(int);
if (map_style == 1)
bytes += memory->usage(map_array,map_tag_max+1);
else if (map_style == 2) {
bytes += map_nbucket*sizeof(int);
bytes += map_nhash*sizeof(HashElem);
}
if (maxnext) {
bytes += memory->usage(next,maxnext);
bytes += memory->usage(permute,maxnext);
}
return bytes;
}
/* ----------------------------------------------------------------------
accumulate per-atom vec names in memstr, padded by spaces
return 1 if padded str is not already in memlist, else 0
------------------------------------------------------------------------- */
int Atom::memcheck(const char *str)
{
int n = strlen(str) + 3;
char *padded = new char[n];
strcpy(padded," ");
strcat(padded,str);
strcat(padded," ");
if (strstr(memstr,padded)) {
delete [] padded;
return 0;
}
if (strlen(memstr) + n >= memlength) {
memlength += DELTA_MEMSTR;
memory->grow(memstr,memlength,"atom:memstr");
}
strcat(memstr,padded);
delete [] padded;
return 1;
}
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