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compute_coord_atom.cpp
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Fri, Jul 5, 15:55
Size
9 KB
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text/x-c
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Sun, Jul 7, 15:55 (1 d, 23 h)
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blob
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rLAMMPS lammps
compute_coord_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 <math.h>
#include <string.h>
#include <stdlib.h>
#include "compute_coord_atom.h"
#include "compute_orientorder_atom.h"
#include "atom.h"
#include "update.h"
#include "modify.h"
#include "neighbor.h"
#include "neigh_list.h"
#include "neigh_request.h"
#include "force.h"
#include "pair.h"
#include "comm.h"
#include "memory.h"
#include "error.h"
using
namespace
LAMMPS_NS
;
#define INVOKED_PERATOM 8
/* ---------------------------------------------------------------------- */
ComputeCoordAtom
::
ComputeCoordAtom
(
LAMMPS
*
lmp
,
int
narg
,
char
**
arg
)
:
Compute
(
lmp
,
narg
,
arg
),
typelo
(
NULL
),
typehi
(
NULL
),
cvec
(
NULL
),
carray
(
NULL
),
id_orientorder
(
NULL
),
normv
(
NULL
)
{
if
(
narg
<
5
)
error
->
all
(
FLERR
,
"Illegal compute coord/atom command"
);
cstyle
=
NONE
;
if
(
strcmp
(
arg
[
3
],
"cutoff"
)
==
0
)
{
cstyle
=
CUTOFF
;
double
cutoff
=
force
->
numeric
(
FLERR
,
arg
[
4
]);
cutsq
=
cutoff
*
cutoff
;
ncol
=
narg
-
5
+
1
;
int
ntypes
=
atom
->
ntypes
;
typelo
=
new
int
[
ncol
];
typehi
=
new
int
[
ncol
];
if
(
narg
==
5
)
{
ncol
=
1
;
typelo
[
0
]
=
1
;
typehi
[
0
]
=
ntypes
;
}
else
{
ncol
=
0
;
int
iarg
=
5
;
while
(
iarg
<
narg
)
{
force
->
bounds
(
FLERR
,
arg
[
iarg
],
ntypes
,
typelo
[
ncol
],
typehi
[
ncol
]);
if
(
typelo
[
ncol
]
>
typehi
[
ncol
])
error
->
all
(
FLERR
,
"Illegal compute coord/atom command"
);
ncol
++
;
iarg
++
;
}
}
}
else
if
(
strcmp
(
arg
[
3
],
"orientorder"
)
==
0
)
{
cstyle
=
ORIENT
;
if
(
narg
!=
6
)
error
->
all
(
FLERR
,
"Illegal compute coord/atom command"
);
int
n
=
strlen
(
arg
[
4
])
+
1
;
id_orientorder
=
new
char
[
n
];
strcpy
(
id_orientorder
,
arg
[
4
]);
int
iorientorder
=
modify
->
find_compute
(
id_orientorder
);
if
(
iorientorder
<
0
)
error
->
all
(
FLERR
,
"Could not find compute coord/atom compute ID"
);
if
(
strcmp
(
modify
->
compute
[
iorientorder
]
->
style
,
"orientorder/atom"
)
!=
0
)
error
->
all
(
FLERR
,
"Compute coord/atom compute ID is not orientorder/atom"
);
threshold
=
force
->
numeric
(
FLERR
,
arg
[
5
]);
if
(
threshold
<=
-
1.0
||
threshold
>=
1.0
)
error
->
all
(
FLERR
,
"Compute coord/atom threshold not between -1 and 1"
);
ncol
=
1
;
typelo
=
new
int
[
ncol
];
typehi
=
new
int
[
ncol
];
typelo
[
0
]
=
1
;
typehi
[
0
]
=
atom
->
ntypes
;
}
else
error
->
all
(
FLERR
,
"Invalid cstyle in compute coord/atom"
);
peratom_flag
=
1
;
if
(
ncol
==
1
)
size_peratom_cols
=
0
;
else
size_peratom_cols
=
ncol
;
nmax
=
0
;
}
/* ---------------------------------------------------------------------- */
ComputeCoordAtom
::~
ComputeCoordAtom
()
{
delete
[]
typelo
;
delete
[]
typehi
;
memory
->
destroy
(
cvec
);
memory
->
destroy
(
carray
);
delete
[]
id_orientorder
;
}
/* ---------------------------------------------------------------------- */
void
ComputeCoordAtom
::
init
()
{
if
(
cstyle
==
ORIENT
)
{
int
iorientorder
=
modify
->
find_compute
(
id_orientorder
);
c_orientorder
=
(
ComputeOrientOrderAtom
*
)(
modify
->
compute
[
iorientorder
]);
cutsq
=
c_orientorder
->
cutsq
;
l
=
c_orientorder
->
qlcomp
;
// communicate real and imaginary 2*l+1 components of the normalized vector
comm_forward
=
2
*
(
2
*
l
+
1
);
if
(
c_orientorder
->
iqlcomp
<
0
)
error
->
all
(
FLERR
,
"Compute coord/atom requires components "
"option in compute orientorder/atom"
);
}
if
(
force
->
pair
==
NULL
)
error
->
all
(
FLERR
,
"Compute coord/atom requires a pair style be defined"
);
if
(
sqrt
(
cutsq
)
>
force
->
pair
->
cutforce
)
error
->
all
(
FLERR
,
"Compute coord/atom cutoff is longer than pairwise cutoff"
);
// need an occasional full neighbor list
int
irequest
=
neighbor
->
request
(
this
,
instance_me
);
neighbor
->
requests
[
irequest
]
->
pair
=
0
;
neighbor
->
requests
[
irequest
]
->
compute
=
1
;
neighbor
->
requests
[
irequest
]
->
half
=
0
;
neighbor
->
requests
[
irequest
]
->
full
=
1
;
neighbor
->
requests
[
irequest
]
->
occasional
=
1
;
int
count
=
0
;
for
(
int
i
=
0
;
i
<
modify
->
ncompute
;
i
++
)
if
(
strcmp
(
modify
->
compute
[
i
]
->
style
,
"coord/atom"
)
==
0
)
count
++
;
if
(
count
>
1
&&
comm
->
me
==
0
)
error
->
warning
(
FLERR
,
"More than one compute coord/atom"
);
}
/* ---------------------------------------------------------------------- */
void
ComputeCoordAtom
::
init_list
(
int
id
,
NeighList
*
ptr
)
{
list
=
ptr
;
}
/* ---------------------------------------------------------------------- */
void
ComputeCoordAtom
::
compute_peratom
()
{
int
i
,
j
,
m
,
ii
,
jj
,
inum
,
jnum
,
jtype
,
n
;
double
xtmp
,
ytmp
,
ztmp
,
delx
,
dely
,
delz
,
rsq
;
int
*
ilist
,
*
jlist
,
*
numneigh
,
**
firstneigh
;
double
*
count
;
invoked_peratom
=
update
->
ntimestep
;
// grow coordination array if necessary
if
(
atom
->
nmax
>
nmax
)
{
if
(
ncol
==
1
)
{
memory
->
destroy
(
cvec
);
nmax
=
atom
->
nmax
;
memory
->
create
(
cvec
,
nmax
,
"coord/atom:cvec"
);
vector_atom
=
cvec
;
}
else
{
memory
->
destroy
(
carray
);
nmax
=
atom
->
nmax
;
memory
->
create
(
carray
,
nmax
,
ncol
,
"coord/atom:carray"
);
array_atom
=
carray
;
}
}
if
(
cstyle
==
ORIENT
)
{
if
(
!
(
c_orientorder
->
invoked_flag
&
INVOKED_PERATOM
))
{
c_orientorder
->
compute_peratom
();
c_orientorder
->
invoked_flag
|=
INVOKED_PERATOM
;
}
nqlist
=
c_orientorder
->
nqlist
;
normv
=
c_orientorder
->
array_atom
;
comm
->
forward_comm_compute
(
this
);
}
// invoke full neighbor list (will copy or build if necessary)
neighbor
->
build_one
(
list
);
inum
=
list
->
inum
;
ilist
=
list
->
ilist
;
numneigh
=
list
->
numneigh
;
firstneigh
=
list
->
firstneigh
;
// compute coordination number(s) for each atom in group
// use full neighbor list to count atoms less than cutoff
double
**
x
=
atom
->
x
;
int
*
type
=
atom
->
type
;
int
*
mask
=
atom
->
mask
;
if
(
cstyle
==
CUTOFF
)
{
if
(
ncol
==
1
)
{
for
(
ii
=
0
;
ii
<
inum
;
ii
++
)
{
i
=
ilist
[
ii
];
if
(
mask
[
i
]
&
groupbit
)
{
xtmp
=
x
[
i
][
0
];
ytmp
=
x
[
i
][
1
];
ztmp
=
x
[
i
][
2
];
jlist
=
firstneigh
[
i
];
jnum
=
numneigh
[
i
];
n
=
0
;
for
(
jj
=
0
;
jj
<
jnum
;
jj
++
)
{
j
=
jlist
[
jj
];
j
&=
NEIGHMASK
;
jtype
=
type
[
j
];
delx
=
xtmp
-
x
[
j
][
0
];
dely
=
ytmp
-
x
[
j
][
1
];
delz
=
ztmp
-
x
[
j
][
2
];
rsq
=
delx
*
delx
+
dely
*
dely
+
delz
*
delz
;
if
(
rsq
<
cutsq
&&
jtype
>=
typelo
[
0
]
&&
jtype
<=
typehi
[
0
])
n
++
;
}
cvec
[
i
]
=
n
;
}
else
cvec
[
i
]
=
0.0
;
}
}
else
{
for
(
ii
=
0
;
ii
<
inum
;
ii
++
)
{
i
=
ilist
[
ii
];
count
=
carray
[
i
];
for
(
m
=
0
;
m
<
ncol
;
m
++
)
count
[
m
]
=
0.0
;
if
(
mask
[
i
]
&
groupbit
)
{
xtmp
=
x
[
i
][
0
];
ytmp
=
x
[
i
][
1
];
ztmp
=
x
[
i
][
2
];
jlist
=
firstneigh
[
i
];
jnum
=
numneigh
[
i
];
for
(
jj
=
0
;
jj
<
jnum
;
jj
++
)
{
j
=
jlist
[
jj
];
j
&=
NEIGHMASK
;
jtype
=
type
[
j
];
delx
=
xtmp
-
x
[
j
][
0
];
dely
=
ytmp
-
x
[
j
][
1
];
delz
=
ztmp
-
x
[
j
][
2
];
rsq
=
delx
*
delx
+
dely
*
dely
+
delz
*
delz
;
if
(
rsq
<
cutsq
)
{
for
(
m
=
0
;
m
<
ncol
;
m
++
)
if
(
jtype
>=
typelo
[
m
]
&&
jtype
<=
typehi
[
m
])
count
[
m
]
+=
1.0
;
}
}
}
}
}
}
else
if
(
cstyle
==
ORIENT
)
{
for
(
ii
=
0
;
ii
<
inum
;
ii
++
)
{
i
=
ilist
[
ii
];
if
(
mask
[
i
]
&
groupbit
)
{
xtmp
=
x
[
i
][
0
];
ytmp
=
x
[
i
][
1
];
ztmp
=
x
[
i
][
2
];
jlist
=
firstneigh
[
i
];
jnum
=
numneigh
[
i
];
n
=
0
;
for
(
jj
=
0
;
jj
<
jnum
;
jj
++
)
{
j
=
jlist
[
jj
];
j
&=
NEIGHMASK
;
delx
=
xtmp
-
x
[
j
][
0
];
dely
=
ytmp
-
x
[
j
][
1
];
delz
=
ztmp
-
x
[
j
][
2
];
rsq
=
delx
*
delx
+
dely
*
dely
+
delz
*
delz
;
if
(
rsq
<
cutsq
)
{
double
dot_product
=
0.0
;
for
(
int
m
=
0
;
m
<
2
*
(
2
*
l
+
1
);
m
++
)
{
dot_product
+=
normv
[
i
][
nqlist
+
m
]
*
normv
[
j
][
nqlist
+
m
];
}
if
(
dot_product
>
threshold
)
n
++
;
}
}
cvec
[
i
]
=
n
;
}
else
cvec
[
i
]
=
0.0
;
}
}
}
/* ---------------------------------------------------------------------- */
int
ComputeCoordAtom
::
pack_forward_comm
(
int
n
,
int
*
list
,
double
*
buf
,
int
pbc_flag
,
int
*
pbc
)
{
int
i
,
m
=
0
,
j
;
for
(
i
=
0
;
i
<
n
;
++
i
)
{
for
(
j
=
nqlist
;
j
<
nqlist
+
2
*
(
2
*
l
+
1
);
++
j
)
{
buf
[
m
++
]
=
normv
[
list
[
i
]][
j
];
}
}
return
m
;
}
/* ---------------------------------------------------------------------- */
void
ComputeCoordAtom
::
unpack_forward_comm
(
int
n
,
int
first
,
double
*
buf
)
{
int
i
,
last
,
m
=
0
,
j
;
last
=
first
+
n
;
for
(
i
=
first
;
i
<
last
;
++
i
)
{
for
(
j
=
nqlist
;
j
<
nqlist
+
2
*
(
2
*
l
+
1
);
++
j
)
{
normv
[
i
][
j
]
=
buf
[
m
++
];
}
}
}
/* ----------------------------------------------------------------------
memory usage of local atom-based array
------------------------------------------------------------------------- */
double
ComputeCoordAtom
::
memory_usage
()
{
double
bytes
=
ncol
*
nmax
*
sizeof
(
double
);
return
bytes
;
}
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