1 |
!! do_Forces.F90 |
2 |
!! module do_Forces |
3 |
!! Calculates Long Range forces. |
4 |
|
5 |
!! @author Charles F. Vardeman II |
6 |
!! @author Matthew Meineke |
7 |
!! @version $Id: do_Forces.F90,v 1.26 2003-07-30 21:17:01 chuckv Exp $, $Date: 2003-07-30 21:17:01 $, $Name: not supported by cvs2svn $, $Revision: 1.26 $ |
8 |
|
9 |
module do_Forces |
10 |
use force_globals |
11 |
use simulation |
12 |
use definitions |
13 |
use atype_module |
14 |
use neighborLists |
15 |
use lj |
16 |
use sticky_pair |
17 |
use dipole_dipole |
18 |
use reaction_field |
19 |
use gb_pair |
20 |
use vector_class |
21 |
use eam |
22 |
use status |
23 |
#ifdef IS_MPI |
24 |
use mpiSimulation |
25 |
#endif |
26 |
|
27 |
implicit none |
28 |
PRIVATE |
29 |
|
30 |
#define __FORTRAN90 |
31 |
#include "fForceField.h" |
32 |
|
33 |
logical, save :: do_forces_initialized = .false., haveRlist = .false. |
34 |
logical, save :: havePolicies = .false. |
35 |
logical, save :: FF_uses_LJ |
36 |
logical, save :: FF_uses_sticky |
37 |
logical, save :: FF_uses_dipoles |
38 |
logical, save :: FF_uses_RF |
39 |
logical, save :: FF_uses_GB |
40 |
logical, save :: FF_uses_EAM |
41 |
|
42 |
real(kind=dp), save :: rlist, rlistsq |
43 |
|
44 |
public :: init_FF |
45 |
public :: do_force_loop |
46 |
public :: setRlistDF |
47 |
|
48 |
contains |
49 |
|
50 |
subroutine setRlistDF( this_rlist ) |
51 |
|
52 |
real(kind=dp) :: this_rlist |
53 |
|
54 |
rlist = this_rlist |
55 |
rlistsq = rlist * rlist |
56 |
|
57 |
haveRlist = .true. |
58 |
if( havePolicies ) do_forces_initialized = .true. |
59 |
|
60 |
end subroutine setRlistDF |
61 |
|
62 |
subroutine init_FF(LJMIXPOLICY, use_RF_c, thisStat) |
63 |
|
64 |
integer, intent(in) :: LJMIXPOLICY |
65 |
logical, intent(in) :: use_RF_c |
66 |
|
67 |
integer, intent(out) :: thisStat |
68 |
integer :: my_status, nMatches |
69 |
integer, pointer :: MatchList(:) => null() |
70 |
real(kind=dp) :: rcut, rrf, rt, dielect |
71 |
|
72 |
!! assume things are copacetic, unless they aren't |
73 |
thisStat = 0 |
74 |
|
75 |
!! Fortran's version of a cast: |
76 |
FF_uses_RF = use_RF_c |
77 |
|
78 |
!! init_FF is called *after* all of the atom types have been |
79 |
!! defined in atype_module using the new_atype subroutine. |
80 |
!! |
81 |
!! this will scan through the known atypes and figure out what |
82 |
!! interactions are used by the force field. |
83 |
|
84 |
FF_uses_LJ = .false. |
85 |
FF_uses_sticky = .false. |
86 |
FF_uses_dipoles = .false. |
87 |
FF_uses_GB = .false. |
88 |
FF_uses_EAM = .false. |
89 |
|
90 |
call getMatchingElementList(atypes, "is_LJ", .true., nMatches, MatchList) |
91 |
if (nMatches .gt. 0) FF_uses_LJ = .true. |
92 |
|
93 |
call getMatchingElementList(atypes, "is_DP", .true., nMatches, MatchList) |
94 |
if (nMatches .gt. 0) FF_uses_dipoles = .true. |
95 |
|
96 |
call getMatchingElementList(atypes, "is_Sticky", .true., nMatches, & |
97 |
MatchList) |
98 |
if (nMatches .gt. 0) FF_uses_Sticky = .true. |
99 |
|
100 |
call getMatchingElementList(atypes, "is_GB", .true., nMatches, MatchList) |
101 |
if (nMatches .gt. 0) FF_uses_GB = .true. |
102 |
|
103 |
call getMatchingElementList(atypes, "is_EAM", .true., nMatches, MatchList) |
104 |
if (nMatches .gt. 0) FF_uses_EAM = .true. |
105 |
|
106 |
!! check to make sure the FF_uses_RF setting makes sense |
107 |
|
108 |
if (FF_uses_dipoles) then |
109 |
if (FF_uses_RF) then |
110 |
dielect = getDielect() |
111 |
call initialize_rf(dielect) |
112 |
endif |
113 |
else |
114 |
if (FF_uses_RF) then |
115 |
write(default_error,*) 'Using Reaction Field with no dipoles? Huh?' |
116 |
thisStat = -1 |
117 |
return |
118 |
endif |
119 |
endif |
120 |
|
121 |
if (FF_uses_LJ) then |
122 |
|
123 |
select case (LJMIXPOLICY) |
124 |
case (LB_MIXING_RULE) |
125 |
call init_lj_FF(LB_MIXING_RULE, my_status) |
126 |
case (EXPLICIT_MIXING_RULE) |
127 |
call init_lj_FF(EXPLICIT_MIXING_RULE, my_status) |
128 |
case default |
129 |
write(default_error,*) 'unknown LJ Mixing Policy!' |
130 |
thisStat = -1 |
131 |
return |
132 |
end select |
133 |
if (my_status /= 0) then |
134 |
thisStat = -1 |
135 |
return |
136 |
end if |
137 |
endif |
138 |
|
139 |
if (FF_uses_sticky) then |
140 |
call check_sticky_FF(my_status) |
141 |
if (my_status /= 0) then |
142 |
thisStat = -1 |
143 |
return |
144 |
end if |
145 |
endif |
146 |
|
147 |
|
148 |
if (FF_uses_EAM) then |
149 |
call init_EAM_FF(my_status) |
150 |
if (my_status /= 0) then |
151 |
thisStat = -1 |
152 |
return |
153 |
end if |
154 |
endif |
155 |
|
156 |
|
157 |
|
158 |
if (FF_uses_GB) then |
159 |
call check_gb_pair_FF(my_status) |
160 |
if (my_status .ne. 0) then |
161 |
thisStat = -1 |
162 |
return |
163 |
endif |
164 |
endif |
165 |
|
166 |
if (FF_uses_GB .and. FF_uses_LJ) then |
167 |
endif |
168 |
if (.not. do_forces_initialized) then |
169 |
!! Create neighbor lists |
170 |
call expandNeighborList(getNlocal(), my_status) |
171 |
if (my_Status /= 0) then |
172 |
write(default_error,*) "SimSetup: ExpandNeighborList returned error." |
173 |
thisStat = -1 |
174 |
return |
175 |
endif |
176 |
endif |
177 |
|
178 |
|
179 |
havePolicies = .true. |
180 |
if( haveRlist ) do_forces_initialized = .true. |
181 |
|
182 |
end subroutine init_FF |
183 |
|
184 |
|
185 |
!! Does force loop over i,j pairs. Calls do_pair to calculates forces. |
186 |
!-------------------------------------------------------------> |
187 |
subroutine do_force_loop(q, A, u_l, f, t, tau, pot, do_pot_c, do_stress_c, & |
188 |
error) |
189 |
!! Position array provided by C, dimensioned by getNlocal |
190 |
real ( kind = dp ), dimension(3,getNlocal()) :: q |
191 |
!! Rotation Matrix for each long range particle in simulation. |
192 |
real( kind = dp), dimension(9,getNlocal()) :: A |
193 |
!! Unit vectors for dipoles (lab frame) |
194 |
real( kind = dp ), dimension(3,getNlocal()) :: u_l |
195 |
!! Force array provided by C, dimensioned by getNlocal |
196 |
real ( kind = dp ), dimension(3,getNlocal()) :: f |
197 |
!! Torsion array provided by C, dimensioned by getNlocal |
198 |
real( kind = dp ), dimension(3,getNlocal()) :: t |
199 |
!! Stress Tensor |
200 |
real( kind = dp), dimension(9) :: tau |
201 |
real ( kind = dp ) :: pot |
202 |
logical ( kind = 2) :: do_pot_c, do_stress_c |
203 |
logical :: do_pot |
204 |
logical :: do_stress |
205 |
#ifdef IS_MPI |
206 |
real( kind = DP ) :: pot_local |
207 |
integer :: nrow |
208 |
integer :: ncol |
209 |
#endif |
210 |
integer :: nlocal |
211 |
integer :: natoms |
212 |
logical :: update_nlist |
213 |
integer :: i, j, jbeg, jend, jnab |
214 |
integer :: nlist |
215 |
real( kind = DP ) :: rijsq |
216 |
real(kind=dp),dimension(3) :: d |
217 |
real(kind=dp) :: rfpot, mu_i, virial |
218 |
integer :: me_i |
219 |
logical :: is_dp_i |
220 |
integer :: neighborListSize |
221 |
integer :: listerror, error |
222 |
integer :: localError |
223 |
|
224 |
real(kind=dp) :: listSkin = 1.0 |
225 |
|
226 |
|
227 |
!! initialize local variables |
228 |
|
229 |
#ifdef IS_MPI |
230 |
pot_local = 0.0_dp |
231 |
nlocal = getNlocal() |
232 |
nrow = getNrow(plan_row) |
233 |
ncol = getNcol(plan_col) |
234 |
#else |
235 |
nlocal = getNlocal() |
236 |
natoms = nlocal |
237 |
#endif |
238 |
write(*,*) "Inside do_Force Loop" |
239 |
call check_initialization(localError) |
240 |
if ( localError .ne. 0 ) then |
241 |
call handleError("do_force_loop","Not Initialized") |
242 |
error = -1 |
243 |
return |
244 |
end if |
245 |
call zero_work_arrays() |
246 |
|
247 |
do_pot = do_pot_c |
248 |
do_stress = do_stress_c |
249 |
|
250 |
! Gather all information needed by all force loops: |
251 |
|
252 |
#ifdef IS_MPI |
253 |
|
254 |
call gather(q,q_Row,plan_row3d) |
255 |
call gather(q,q_Col,plan_col3d) |
256 |
|
257 |
if (FF_UsesDirectionalAtoms() .and. SimUsesDirectionalAtoms()) then |
258 |
call gather(u_l,u_l_Row,plan_row3d) |
259 |
call gather(u_l,u_l_Col,plan_col3d) |
260 |
|
261 |
call gather(A,A_Row,plan_row_rotation) |
262 |
call gather(A,A_Col,plan_col_rotation) |
263 |
endif |
264 |
|
265 |
#endif |
266 |
|
267 |
if (FF_RequiresPrepairCalc() .and. SimRequiresPrepairCalc()) then |
268 |
!! See if we need to update neighbor lists |
269 |
call checkNeighborList(nlocal, q, listSkin, update_nlist) |
270 |
!! if_mpi_gather_stuff_for_prepair |
271 |
!! do_prepair_loop_if_needed |
272 |
!! if_mpi_scatter_stuff_from_prepair |
273 |
!! if_mpi_gather_stuff_from_prepair_to_main_loop |
274 |
|
275 |
!--------------------PREFORCE LOOP----------->>>>>>>>>>>>>>>>>>>>>>>>>>> |
276 |
#ifdef IS_MPI |
277 |
|
278 |
if (update_nlist) then |
279 |
|
280 |
!! save current configuration, construct neighbor list, |
281 |
!! and calculate forces |
282 |
call saveNeighborList(nlocal, q) |
283 |
|
284 |
neighborListSize = size(list) |
285 |
nlist = 0 |
286 |
|
287 |
do i = 1, nrow |
288 |
point(i) = nlist + 1 |
289 |
|
290 |
prepair_inner: do j = 1, ncol |
291 |
|
292 |
if (skipThisPair(i,j)) cycle prepair_inner |
293 |
|
294 |
call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq) |
295 |
|
296 |
if (rijsq < rlistsq) then |
297 |
|
298 |
nlist = nlist + 1 |
299 |
|
300 |
if (nlist > neighborListSize) then |
301 |
call expandNeighborList(nlocal, listerror) |
302 |
if (listerror /= 0) then |
303 |
error = -1 |
304 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
305 |
return |
306 |
end if |
307 |
neighborListSize = size(list) |
308 |
endif |
309 |
|
310 |
list(nlist) = j |
311 |
call do_prepair(i, j, rijsq, d, do_pot, do_stress, u_l, A, f, t, pot_local) |
312 |
endif |
313 |
enddo prepair_inner |
314 |
enddo |
315 |
|
316 |
point(nrow + 1) = nlist + 1 |
317 |
|
318 |
else !! (of update_check) |
319 |
|
320 |
! use the list to find the neighbors |
321 |
do i = 1, nrow |
322 |
JBEG = POINT(i) |
323 |
JEND = POINT(i+1) - 1 |
324 |
! check thiat molecule i has neighbors |
325 |
if (jbeg .le. jend) then |
326 |
|
327 |
do jnab = jbeg, jend |
328 |
j = list(jnab) |
329 |
|
330 |
call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq) |
331 |
call do_prepair(i, j, rijsq, d, do_pot, do_stress, & |
332 |
u_l, A, f, t, pot_local) |
333 |
|
334 |
enddo |
335 |
endif |
336 |
enddo |
337 |
endif |
338 |
|
339 |
#else |
340 |
|
341 |
if (update_nlist) then |
342 |
|
343 |
! save current configuration, contruct neighbor list, |
344 |
! and calculate forces |
345 |
call saveNeighborList(natoms, q) |
346 |
|
347 |
neighborListSize = size(list) |
348 |
|
349 |
nlist = 0 |
350 |
|
351 |
do i = 1, natoms-1 |
352 |
point(i) = nlist + 1 |
353 |
|
354 |
prepair_inner: do j = i+1, natoms |
355 |
|
356 |
if (skipThisPair(i,j)) cycle prepair_inner |
357 |
|
358 |
call get_interatomic_vector(q(:,i), q(:,j), d, rijsq) |
359 |
|
360 |
|
361 |
if (rijsq < rlistsq) then |
362 |
|
363 |
nlist = nlist + 1 |
364 |
|
365 |
if (nlist > neighborListSize) then |
366 |
call expandNeighborList(natoms, listerror) |
367 |
if (listerror /= 0) then |
368 |
error = -1 |
369 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
370 |
return |
371 |
end if |
372 |
neighborListSize = size(list) |
373 |
endif |
374 |
|
375 |
list(nlist) = j |
376 |
|
377 |
call do_prepair(i, j, rijsq, d, do_pot, do_stress, & |
378 |
u_l, A, f, t, pot) |
379 |
|
380 |
endif |
381 |
enddo prepair_inner |
382 |
enddo |
383 |
|
384 |
point(natoms) = nlist + 1 |
385 |
|
386 |
else !! (update) |
387 |
|
388 |
! use the list to find the neighbors |
389 |
do i = 1, natoms-1 |
390 |
JBEG = POINT(i) |
391 |
JEND = POINT(i+1) - 1 |
392 |
! check thiat molecule i has neighbors |
393 |
if (jbeg .le. jend) then |
394 |
|
395 |
do jnab = jbeg, jend |
396 |
j = list(jnab) |
397 |
|
398 |
call get_interatomic_vector(q(:,i), q(:,j), d, rijsq) |
399 |
call do_prepair(i, j, rijsq, d, do_pot, do_stress, & |
400 |
u_l, A, f, t, pot) |
401 |
|
402 |
enddo |
403 |
endif |
404 |
enddo |
405 |
endif |
406 |
#endif |
407 |
!! Do rest of preforce calculations |
408 |
call do_preforce(nlocal,pot) |
409 |
else |
410 |
!! See if we need to update neighbor lists for non pre-pair |
411 |
call checkNeighborList(nlocal, q, listSkin, update_nlist) |
412 |
endif |
413 |
|
414 |
|
415 |
|
416 |
|
417 |
|
418 |
!---------------------------------MAIN Pair LOOP->>>>>>>>>>>>>>>>>>>>>>>>>>>> |
419 |
|
420 |
|
421 |
|
422 |
|
423 |
|
424 |
#ifdef IS_MPI |
425 |
|
426 |
if (update_nlist) then |
427 |
|
428 |
!! save current configuration, construct neighbor list, |
429 |
!! and calculate forces |
430 |
call saveNeighborList(nlocal, q) |
431 |
|
432 |
neighborListSize = size(list) |
433 |
nlist = 0 |
434 |
|
435 |
do i = 1, nrow |
436 |
point(i) = nlist + 1 |
437 |
|
438 |
inner: do j = 1, ncol |
439 |
|
440 |
if (skipThisPair(i,j)) cycle inner |
441 |
|
442 |
call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq) |
443 |
|
444 |
if (rijsq < rlistsq) then |
445 |
|
446 |
nlist = nlist + 1 |
447 |
|
448 |
if (nlist > neighborListSize) then |
449 |
call expandNeighborList(nlocal, listerror) |
450 |
if (listerror /= 0) then |
451 |
error = -1 |
452 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
453 |
return |
454 |
end if |
455 |
neighborListSize = size(list) |
456 |
endif |
457 |
|
458 |
list(nlist) = j |
459 |
|
460 |
call do_pair(i, j, rijsq, d, do_pot, do_stress, & |
461 |
u_l, A, f, t, pot_local) |
462 |
|
463 |
endif |
464 |
enddo inner |
465 |
enddo |
466 |
|
467 |
point(nrow + 1) = nlist + 1 |
468 |
|
469 |
else !! (of update_check) |
470 |
|
471 |
! use the list to find the neighbors |
472 |
do i = 1, nrow |
473 |
JBEG = POINT(i) |
474 |
JEND = POINT(i+1) - 1 |
475 |
! check thiat molecule i has neighbors |
476 |
if (jbeg .le. jend) then |
477 |
|
478 |
do jnab = jbeg, jend |
479 |
j = list(jnab) |
480 |
|
481 |
call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq) |
482 |
call do_pair(i, j, rijsq, d, do_pot, do_stress, & |
483 |
u_l, A, f, t, pot_local) |
484 |
|
485 |
enddo |
486 |
endif |
487 |
enddo |
488 |
endif |
489 |
|
490 |
#else |
491 |
|
492 |
if (update_nlist) then |
493 |
|
494 |
! save current configuration, contruct neighbor list, |
495 |
! and calculate forces |
496 |
call saveNeighborList(natoms, q) |
497 |
|
498 |
neighborListSize = size(list) |
499 |
|
500 |
nlist = 0 |
501 |
|
502 |
do i = 1, natoms-1 |
503 |
point(i) = nlist + 1 |
504 |
|
505 |
inner: do j = i+1, natoms |
506 |
|
507 |
if (skipThisPair(i,j)) cycle inner |
508 |
|
509 |
call get_interatomic_vector(q(:,i), q(:,j), d, rijsq) |
510 |
|
511 |
|
512 |
if (rijsq < rlistsq) then |
513 |
|
514 |
nlist = nlist + 1 |
515 |
|
516 |
if (nlist > neighborListSize) then |
517 |
call expandNeighborList(natoms, listerror) |
518 |
if (listerror /= 0) then |
519 |
error = -1 |
520 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
521 |
return |
522 |
end if |
523 |
neighborListSize = size(list) |
524 |
endif |
525 |
|
526 |
list(nlist) = j |
527 |
|
528 |
call do_pair(i, j, rijsq, d, do_pot, do_stress, & |
529 |
u_l, A, f, t, pot) |
530 |
|
531 |
endif |
532 |
enddo inner |
533 |
enddo |
534 |
|
535 |
point(natoms) = nlist + 1 |
536 |
|
537 |
else !! (update) |
538 |
|
539 |
! use the list to find the neighbors |
540 |
do i = 1, natoms-1 |
541 |
JBEG = POINT(i) |
542 |
JEND = POINT(i+1) - 1 |
543 |
! check thiat molecule i has neighbors |
544 |
if (jbeg .le. jend) then |
545 |
|
546 |
do jnab = jbeg, jend |
547 |
j = list(jnab) |
548 |
|
549 |
call get_interatomic_vector(q(:,i), q(:,j), d, rijsq) |
550 |
call do_pair(i, j, rijsq, d, do_pot, do_stress, & |
551 |
u_l, A, f, t, pot) |
552 |
|
553 |
enddo |
554 |
endif |
555 |
enddo |
556 |
endif |
557 |
|
558 |
#endif |
559 |
|
560 |
! phew, done with main loop. |
561 |
|
562 |
#ifdef IS_MPI |
563 |
!!distribute forces |
564 |
|
565 |
f_temp = 0.0_dp |
566 |
call scatter(f_Row,f_temp,plan_row3d) |
567 |
do i = 1,nlocal |
568 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
569 |
end do |
570 |
|
571 |
f_temp = 0.0_dp |
572 |
call scatter(f_Col,f_temp,plan_col3d) |
573 |
do i = 1,nlocal |
574 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
575 |
end do |
576 |
|
577 |
if (FF_UsesDirectionalAtoms() .and. SimUsesDirectionalAtoms()) then |
578 |
t_temp = 0.0_dp |
579 |
call scatter(t_Row,t_temp,plan_row3d) |
580 |
do i = 1,nlocal |
581 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
582 |
end do |
583 |
t_temp = 0.0_dp |
584 |
call scatter(t_Col,t_temp,plan_col3d) |
585 |
|
586 |
do i = 1,nlocal |
587 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
588 |
end do |
589 |
endif |
590 |
|
591 |
if (do_pot) then |
592 |
! scatter/gather pot_row into the members of my column |
593 |
call scatter(pot_Row, pot_Temp, plan_row) |
594 |
|
595 |
! scatter/gather pot_local into all other procs |
596 |
! add resultant to get total pot |
597 |
do i = 1, nlocal |
598 |
pot_local = pot_local + pot_Temp(i) |
599 |
enddo |
600 |
|
601 |
pot_Temp = 0.0_DP |
602 |
|
603 |
call scatter(pot_Col, pot_Temp, plan_col) |
604 |
do i = 1, nlocal |
605 |
pot_local = pot_local + pot_Temp(i) |
606 |
enddo |
607 |
|
608 |
endif |
609 |
#endif |
610 |
|
611 |
if (FF_RequiresPostpairCalc() .and. SimRequiresPostpairCalc()) then |
612 |
|
613 |
if (FF_uses_RF .and. SimUsesRF()) then |
614 |
|
615 |
#ifdef IS_MPI |
616 |
call scatter(rf_Row,rf,plan_row3d) |
617 |
call scatter(rf_Col,rf_Temp,plan_col3d) |
618 |
do i = 1,nlocal |
619 |
rf(1:3,i) = rf(1:3,i) + rf_Temp(1:3,i) |
620 |
end do |
621 |
#endif |
622 |
|
623 |
do i = 1, getNlocal() |
624 |
|
625 |
rfpot = 0.0_DP |
626 |
#ifdef IS_MPI |
627 |
me_i = atid_row(i) |
628 |
#else |
629 |
me_i = atid(i) |
630 |
#endif |
631 |
call getElementProperty(atypes, me_i, "is_DP", is_DP_i) |
632 |
if ( is_DP_i ) then |
633 |
call getElementProperty(atypes, me_i, "dipole_moment", mu_i) |
634 |
!! The reaction field needs to include a self contribution |
635 |
!! to the field: |
636 |
call accumulate_self_rf(i, mu_i, u_l) |
637 |
!! Get the reaction field contribution to the |
638 |
!! potential and torques: |
639 |
call reaction_field_final(i, mu_i, u_l, rfpot, t, do_pot) |
640 |
#ifdef IS_MPI |
641 |
pot_local = pot_local + rfpot |
642 |
#else |
643 |
pot = pot + rfpot |
644 |
|
645 |
#endif |
646 |
endif |
647 |
enddo |
648 |
endif |
649 |
endif |
650 |
|
651 |
|
652 |
#ifdef IS_MPI |
653 |
|
654 |
if (do_pot) then |
655 |
pot = pot + pot_local |
656 |
!! we assume the c code will do the allreduce to get the total potential |
657 |
!! we could do it right here if we needed to... |
658 |
endif |
659 |
|
660 |
if (do_stress) then |
661 |
call mpi_allreduce(tau_Temp, tau, 9,mpi_double_precision,mpi_sum, & |
662 |
mpi_comm_world,mpi_err) |
663 |
call mpi_allreduce(virial_Temp, virial,1,mpi_double_precision,mpi_sum, & |
664 |
mpi_comm_world,mpi_err) |
665 |
endif |
666 |
|
667 |
#else |
668 |
|
669 |
if (do_stress) then |
670 |
tau = tau_Temp |
671 |
virial = virial_Temp |
672 |
endif |
673 |
|
674 |
#endif |
675 |
|
676 |
end subroutine do_force_loop |
677 |
|
678 |
subroutine do_pair(i, j, rijsq, d, do_pot, do_stress, u_l, A, f, t, pot) |
679 |
|
680 |
real( kind = dp ) :: pot |
681 |
real( kind = dp ), dimension(3,getNlocal()) :: u_l |
682 |
real (kind=dp), dimension(9,getNlocal()) :: A |
683 |
real (kind=dp), dimension(3,getNlocal()) :: f |
684 |
real (kind=dp), dimension(3,getNlocal()) :: t |
685 |
|
686 |
logical, intent(inout) :: do_pot, do_stress |
687 |
integer, intent(in) :: i, j |
688 |
real ( kind = dp ), intent(inout) :: rijsq |
689 |
real ( kind = dp ) :: r |
690 |
real ( kind = dp ), intent(inout) :: d(3) |
691 |
logical :: is_LJ_i, is_LJ_j |
692 |
logical :: is_DP_i, is_DP_j |
693 |
logical :: is_GB_i, is_GB_j |
694 |
logical :: is_EAM_i,is_EAM_j |
695 |
logical :: is_Sticky_i, is_Sticky_j |
696 |
integer :: me_i, me_j |
697 |
|
698 |
r = sqrt(rijsq) |
699 |
|
700 |
#ifdef IS_MPI |
701 |
if (tagRow(i) .eq. tagColumn(j)) then |
702 |
write(0,*) 'do_pair is doing', i , j, tagRow(i), tagColumn(j) |
703 |
endif |
704 |
|
705 |
me_i = atid_row(i) |
706 |
me_j = atid_col(j) |
707 |
|
708 |
#else |
709 |
|
710 |
me_i = atid(i) |
711 |
me_j = atid(j) |
712 |
|
713 |
#endif |
714 |
|
715 |
if (FF_uses_LJ .and. SimUsesLJ()) then |
716 |
call getElementProperty(atypes, me_i, "is_LJ", is_LJ_i) |
717 |
call getElementProperty(atypes, me_j, "is_LJ", is_LJ_j) |
718 |
|
719 |
if ( is_LJ_i .and. is_LJ_j ) & |
720 |
call do_lj_pair(i, j, d, r, rijsq, pot, f, do_pot, do_stress) |
721 |
endif |
722 |
|
723 |
if (FF_uses_dipoles .and. SimUsesDipoles()) then |
724 |
call getElementProperty(atypes, me_i, "is_DP", is_DP_i) |
725 |
call getElementProperty(atypes, me_j, "is_DP", is_DP_j) |
726 |
|
727 |
if ( is_DP_i .and. is_DP_j ) then |
728 |
|
729 |
call do_dipole_pair(i, j, d, r, rijsq, pot, u_l, f, t, & |
730 |
do_pot, do_stress) |
731 |
if (FF_uses_RF .and. SimUsesRF()) then |
732 |
call accumulate_rf(i, j, r, u_l) |
733 |
call rf_correct_forces(i, j, d, r, u_l, f, do_stress) |
734 |
endif |
735 |
|
736 |
endif |
737 |
endif |
738 |
|
739 |
if (FF_uses_Sticky .and. SimUsesSticky()) then |
740 |
|
741 |
call getElementProperty(atypes, me_i, "is_Sticky", is_Sticky_i) |
742 |
call getElementProperty(atypes, me_j, "is_Sticky", is_Sticky_j) |
743 |
|
744 |
if ( is_Sticky_i .and. is_Sticky_j ) then |
745 |
call do_sticky_pair(i, j, d, r, rijsq, A, pot, f, t, & |
746 |
do_pot, do_stress) |
747 |
endif |
748 |
endif |
749 |
|
750 |
|
751 |
if (FF_uses_GB .and. SimUsesGB()) then |
752 |
|
753 |
call getElementProperty(atypes, me_i, "is_GB", is_GB_i) |
754 |
call getElementProperty(atypes, me_j, "is_GB", is_GB_j) |
755 |
|
756 |
if ( is_GB_i .and. is_GB_j ) then |
757 |
call do_gb_pair(i, j, d, r, rijsq, u_l, pot, f, t, & |
758 |
do_pot, do_stress) |
759 |
endif |
760 |
endif |
761 |
|
762 |
|
763 |
|
764 |
if (FF_uses_EAM .and. SimUsesEAM()) then |
765 |
call getElementProperty(atypes, me_i, "is_EAM", is_EAM_i) |
766 |
call getElementProperty(atypes, me_j, "is_EAM", is_EAM_j) |
767 |
|
768 |
if ( is_EAM_i .and. is_EAM_j ) & |
769 |
call do_eam_pair(i, j, d, r, rijsq, pot, f, do_pot, do_stress) |
770 |
endif |
771 |
|
772 |
|
773 |
|
774 |
|
775 |
end subroutine do_pair |
776 |
|
777 |
|
778 |
|
779 |
subroutine do_prepair(i, j, rijsq, d, do_pot, do_stress, u_l, A, f, t, pot) |
780 |
real( kind = dp ) :: pot |
781 |
real( kind = dp ), dimension(3,getNlocal()) :: u_l |
782 |
real (kind=dp), dimension(9,getNlocal()) :: A |
783 |
real (kind=dp), dimension(3,getNlocal()) :: f |
784 |
real (kind=dp), dimension(3,getNlocal()) :: t |
785 |
|
786 |
logical, intent(inout) :: do_pot, do_stress |
787 |
integer, intent(in) :: i, j |
788 |
real ( kind = dp ), intent(inout) :: rijsq |
789 |
real ( kind = dp ) :: r |
790 |
real ( kind = dp ), intent(inout) :: d(3) |
791 |
|
792 |
logical :: is_EAM_i, is_EAM_j |
793 |
|
794 |
integer :: me_i, me_j |
795 |
|
796 |
r = sqrt(rijsq) |
797 |
|
798 |
#ifdef IS_MPI |
799 |
if (tagRow(i) .eq. tagColumn(j)) then |
800 |
write(0,*) 'do_pair is doing', i , j, tagRow(i), tagColumn(j) |
801 |
endif |
802 |
|
803 |
me_i = atid_row(i) |
804 |
me_j = atid_col(j) |
805 |
|
806 |
#else |
807 |
|
808 |
me_i = atid(i) |
809 |
me_j = atid(j) |
810 |
|
811 |
#endif |
812 |
|
813 |
if (FF_uses_EAM .and. SimUsesEAM()) then |
814 |
call getElementProperty(atypes, me_i, "is_EAM", is_EAM_i) |
815 |
call getElementProperty(atypes, me_j, "is_EAM", is_EAM_j) |
816 |
|
817 |
if ( is_EAM_i .and. is_EAM_j ) & |
818 |
call calc_EAM_prepair_rho(i, j, d, r, rijsq ) |
819 |
endif |
820 |
end subroutine do_prepair |
821 |
|
822 |
|
823 |
|
824 |
|
825 |
subroutine do_preforce(nlocal,pot) |
826 |
integer :: nlocal |
827 |
real( kind = dp ) :: pot |
828 |
|
829 |
if (FF_uses_EAM .and. SimUsesEAM()) then |
830 |
call calc_EAM_preforce_Frho(nlocal,pot) |
831 |
endif |
832 |
|
833 |
|
834 |
end subroutine do_preforce |
835 |
|
836 |
|
837 |
subroutine get_interatomic_vector(q_i, q_j, d, r_sq) |
838 |
|
839 |
real (kind = dp), dimension(3) :: q_i |
840 |
real (kind = dp), dimension(3) :: q_j |
841 |
real ( kind = dp ), intent(out) :: r_sq |
842 |
real( kind = dp ) :: d(3), scaled(3) |
843 |
integer i |
844 |
|
845 |
d(1:3) = q_j(1:3) - q_i(1:3) |
846 |
|
847 |
! Wrap back into periodic box if necessary |
848 |
if ( SimUsesPBC() ) then |
849 |
|
850 |
if( .not.boxIsOrthorhombic ) then |
851 |
! calc the scaled coordinates. |
852 |
|
853 |
scaled = matmul(HmatInv, d) |
854 |
|
855 |
! wrap the scaled coordinates |
856 |
|
857 |
scaled = scaled - anint(scaled) |
858 |
|
859 |
|
860 |
! calc the wrapped real coordinates from the wrapped scaled |
861 |
! coordinates |
862 |
|
863 |
d = matmul(Hmat,scaled) |
864 |
|
865 |
else |
866 |
! calc the scaled coordinates. |
867 |
|
868 |
do i = 1, 3 |
869 |
scaled(i) = d(i) * HmatInv(i,i) |
870 |
|
871 |
! wrap the scaled coordinates |
872 |
|
873 |
scaled(i) = scaled(i) - anint(scaled(i)) |
874 |
|
875 |
! calc the wrapped real coordinates from the wrapped scaled |
876 |
! coordinates |
877 |
|
878 |
d(i) = scaled(i)*Hmat(i,i) |
879 |
enddo |
880 |
endif |
881 |
|
882 |
endif |
883 |
|
884 |
r_sq = dot_product(d,d) |
885 |
|
886 |
end subroutine get_interatomic_vector |
887 |
|
888 |
subroutine check_initialization(error) |
889 |
integer, intent(out) :: error |
890 |
|
891 |
error = 0 |
892 |
! Make sure we are properly initialized. |
893 |
if (.not. do_forces_initialized) then |
894 |
write(*,*) "Forces not initialized" |
895 |
error = -1 |
896 |
return |
897 |
endif |
898 |
|
899 |
#ifdef IS_MPI |
900 |
if (.not. isMPISimSet()) then |
901 |
write(default_error,*) "ERROR: mpiSimulation has not been initialized!" |
902 |
error = -1 |
903 |
return |
904 |
endif |
905 |
#endif |
906 |
|
907 |
return |
908 |
end subroutine check_initialization |
909 |
|
910 |
|
911 |
subroutine zero_work_arrays() |
912 |
|
913 |
#ifdef IS_MPI |
914 |
|
915 |
q_Row = 0.0_dp |
916 |
q_Col = 0.0_dp |
917 |
|
918 |
u_l_Row = 0.0_dp |
919 |
u_l_Col = 0.0_dp |
920 |
|
921 |
A_Row = 0.0_dp |
922 |
A_Col = 0.0_dp |
923 |
|
924 |
f_Row = 0.0_dp |
925 |
f_Col = 0.0_dp |
926 |
f_Temp = 0.0_dp |
927 |
|
928 |
t_Row = 0.0_dp |
929 |
t_Col = 0.0_dp |
930 |
t_Temp = 0.0_dp |
931 |
|
932 |
pot_Row = 0.0_dp |
933 |
pot_Col = 0.0_dp |
934 |
pot_Temp = 0.0_dp |
935 |
|
936 |
rf_Row = 0.0_dp |
937 |
rf_Col = 0.0_dp |
938 |
rf_Temp = 0.0_dp |
939 |
|
940 |
#endif |
941 |
|
942 |
rf = 0.0_dp |
943 |
tau_Temp = 0.0_dp |
944 |
virial_Temp = 0.0_dp |
945 |
end subroutine zero_work_arrays |
946 |
|
947 |
function skipThisPair(atom1, atom2) result(skip_it) |
948 |
integer, intent(in) :: atom1 |
949 |
integer, intent(in), optional :: atom2 |
950 |
logical :: skip_it |
951 |
integer :: unique_id_1, unique_id_2 |
952 |
integer :: me_i,me_j |
953 |
integer :: i |
954 |
|
955 |
skip_it = .false. |
956 |
|
957 |
!! there are a number of reasons to skip a pair or a particle |
958 |
!! mostly we do this to exclude atoms who are involved in short |
959 |
!! range interactions (bonds, bends, torsions), but we also need |
960 |
!! to exclude some overcounted interactions that result from |
961 |
!! the parallel decomposition |
962 |
|
963 |
#ifdef IS_MPI |
964 |
!! in MPI, we have to look up the unique IDs for each atom |
965 |
unique_id_1 = tagRow(atom1) |
966 |
#else |
967 |
!! in the normal loop, the atom numbers are unique |
968 |
unique_id_1 = atom1 |
969 |
#endif |
970 |
|
971 |
!! We were called with only one atom, so just check the global exclude |
972 |
!! list for this atom |
973 |
if (.not. present(atom2)) then |
974 |
do i = 1, nExcludes_global |
975 |
if (excludesGlobal(i) == unique_id_1) then |
976 |
skip_it = .true. |
977 |
return |
978 |
end if |
979 |
end do |
980 |
return |
981 |
end if |
982 |
|
983 |
#ifdef IS_MPI |
984 |
unique_id_2 = tagColumn(atom2) |
985 |
#else |
986 |
unique_id_2 = atom2 |
987 |
#endif |
988 |
|
989 |
#ifdef IS_MPI |
990 |
!! this situation should only arise in MPI simulations |
991 |
if (unique_id_1 == unique_id_2) then |
992 |
skip_it = .true. |
993 |
return |
994 |
end if |
995 |
|
996 |
!! this prevents us from doing the pair on multiple processors |
997 |
if (unique_id_1 < unique_id_2) then |
998 |
if (mod(unique_id_1 + unique_id_2,2) == 0) then |
999 |
skip_it = .true. |
1000 |
return |
1001 |
endif |
1002 |
else |
1003 |
if (mod(unique_id_1 + unique_id_2,2) == 1) then |
1004 |
skip_it = .true. |
1005 |
return |
1006 |
endif |
1007 |
endif |
1008 |
#endif |
1009 |
|
1010 |
!! the rest of these situations can happen in all simulations: |
1011 |
do i = 1, nExcludes_global |
1012 |
if ((excludesGlobal(i) == unique_id_1) .or. & |
1013 |
(excludesGlobal(i) == unique_id_2)) then |
1014 |
skip_it = .true. |
1015 |
return |
1016 |
endif |
1017 |
enddo |
1018 |
|
1019 |
do i = 1, nExcludes_local |
1020 |
if (excludesLocal(1,i) == unique_id_1) then |
1021 |
if (excludesLocal(2,i) == unique_id_2) then |
1022 |
skip_it = .true. |
1023 |
return |
1024 |
endif |
1025 |
else |
1026 |
if (excludesLocal(1,i) == unique_id_2) then |
1027 |
if (excludesLocal(2,i) == unique_id_1) then |
1028 |
skip_it = .true. |
1029 |
return |
1030 |
endif |
1031 |
endif |
1032 |
endif |
1033 |
end do |
1034 |
|
1035 |
return |
1036 |
end function skipThisPair |
1037 |
|
1038 |
function FF_UsesDirectionalAtoms() result(doesit) |
1039 |
logical :: doesit |
1040 |
doesit = FF_uses_dipoles .or. FF_uses_sticky .or. & |
1041 |
FF_uses_GB .or. FF_uses_RF |
1042 |
end function FF_UsesDirectionalAtoms |
1043 |
|
1044 |
function FF_RequiresPrepairCalc() result(doesit) |
1045 |
logical :: doesit |
1046 |
doesit = FF_uses_EAM |
1047 |
end function FF_RequiresPrepairCalc |
1048 |
|
1049 |
function FF_RequiresPostpairCalc() result(doesit) |
1050 |
logical :: doesit |
1051 |
doesit = FF_uses_RF |
1052 |
end function FF_RequiresPostpairCalc |
1053 |
|
1054 |
end module do_Forces |