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atom_vec_dpd.cpp
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Sun, Aug 4, 12:12

atom_vec_dpd.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 "stdlib.h"
#include "atom_vec_dpd.h"
#include "atom.h"
#include "domain.h"
#include "modify.h"
#include "fix.h"
#include "memory.h"
#include "error.h"
using namespace LAMMPS_NS;
#define DELTA 10000
/* ---------------------------------------------------------------------- */
AtomVecDPD::AtomVecDPD(LAMMPS *lmp, int narg, char **arg) :
AtomVecAtomic(lmp, narg, arg)
{
mass_type = 1;
comm_x_only = 0;
size_comm = 6;
size_reverse = 3;
size_border = 9;
size_data_atom = 5;
size_data_vel = 4;
xcol_data = 3;
}
/* ---------------------------------------------------------------------- */
int AtomVecDPD::pack_comm(int n, int *list, double *buf,
int pbc_flag, int *pbc)
{
int i,j,m;
double dx,dy,dz;
m = 0;
if (pbc_flag == 0) {
for (i = 0; i < n; i++) {
j = list[i];
buf[m++] = x[j][0];
buf[m++] = x[j][1];
buf[m++] = x[j][2];
buf[m++] = v[j][0];
buf[m++] = v[j][1];
buf[m++] = v[j][2];
}
} else {
if (domain->triclinic == 0) {
dx = pbc[0]*domain->xprd;
dy = pbc[1]*domain->yprd;
dz = pbc[2]*domain->zprd;
} else {
dx = pbc[0]*domain->xprd + pbc[5]*domain->xy + pbc[4]*domain->xz;
dy = pbc[1]*domain->yprd + pbc[3]*domain->yz;
dz = pbc[2]*domain->zprd;
}
for (i = 0; i < n; i++) {
j = list[i];
buf[m++] = x[j][0] + dx;
buf[m++] = x[j][1] + dy;
buf[m++] = x[j][2] + dz;
buf[m++] = v[j][0];
buf[m++] = v[j][1];
buf[m++] = v[j][2];
}
}
return m;
}
/* ---------------------------------------------------------------------- */
int AtomVecDPD::pack_comm_one(int i, double *buf)
{
buf[0] = v[i][0];
buf[1] = v[i][1];
buf[2] = v[i][2];
return 3;
}
/* ---------------------------------------------------------------------- */
void AtomVecDPD::unpack_comm(int n, int first, double *buf)
{
int i,m,last;
m = 0;
last = first + n;
for (i = first; i < last; i++) {
x[i][0] = buf[m++];
x[i][1] = buf[m++];
x[i][2] = buf[m++];
v[i][0] = buf[m++];
v[i][1] = buf[m++];
v[i][2] = buf[m++];
}
}
/* ---------------------------------------------------------------------- */
int AtomVecDPD::unpack_comm_one(int i, double *buf)
{
v[i][0] = buf[0];
v[i][1] = buf[1];
v[i][2] = buf[2];
return 3;
}
/* ---------------------------------------------------------------------- */
int AtomVecDPD::pack_border(int n, int *list, double *buf,
int pbc_flag, int *pbc)
{
int i,j,m;
double dx,dy,dz;
m = 0;
if (pbc_flag == 0) {
for (i = 0; i < n; i++) {
j = list[i];
buf[m++] = x[j][0];
buf[m++] = x[j][1];
buf[m++] = x[j][2];
buf[m++] = tag[j];
buf[m++] = type[j];
buf[m++] = mask[j];
buf[m++] = v[j][0];
buf[m++] = v[j][1];
buf[m++] = v[j][2];
}
} else {
if (domain->triclinic == 0) {
dx = pbc[0]*domain->xprd;
dy = pbc[1]*domain->yprd;
dz = pbc[2]*domain->zprd;
} else {
dx = pbc[0];
dy = pbc[1];
dz = pbc[2];
}
for (i = 0; i < n; i++) {
j = list[i];
buf[m++] = x[j][0] + dx;
buf[m++] = x[j][1] + dy;
buf[m++] = x[j][2] + dz;
buf[m++] = tag[j];
buf[m++] = type[j];
buf[m++] = mask[j];
buf[m++] = v[j][0];
buf[m++] = v[j][1];
buf[m++] = v[j][2];
}
}
return m;
}
/* ---------------------------------------------------------------------- */
int AtomVecDPD::pack_border_one(int i, double *buf)
{
buf[0] = v[i][0];
buf[1] = v[i][1];
buf[2] = v[i][2];
return 3;
}
/* ---------------------------------------------------------------------- */
void AtomVecDPD::unpack_border(int n, int first, double *buf)
{
int i,m,last;
m = 0;
last = first + n;
for (i = first; i < last; i++) {
if (i == nmax) grow(0);
x[i][0] = buf[m++];
x[i][1] = buf[m++];
x[i][2] = buf[m++];
tag[i] = static_cast<int> (buf[m++]);
type[i] = static_cast<int> (buf[m++]);
mask[i] = static_cast<int> (buf[m++]);
v[i][0] = buf[m++];
v[i][1] = buf[m++];
v[i][2] = buf[m++];
}
}
/* ---------------------------------------------------------------------- */
int AtomVecDPD::unpack_border_one(int i, double *buf)
{
v[i][0] = buf[0];
v[i][1] = buf[1];
v[i][2] = buf[2];
return 3;
}

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