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 1.54 2004-05-07 21:35:04 gezelter Exp $, $Date: 2004-05-07 21:35:04 $, $Name: not supported by cvs2svn $, $Revision: 1.54 $ |
8 |
|
9 |
module do_Forces |
10 |
use force_globals |
11 |
use simulation |
12 |
use definitions |
13 |
use atype_module |
14 |
use switcheroo |
15 |
use neighborLists |
16 |
use lj |
17 |
use sticky_pair |
18 |
use dipole_dipole |
19 |
use charge_charge |
20 |
use reaction_field |
21 |
use gb_pair |
22 |
use vector_class |
23 |
use eam |
24 |
use status |
25 |
#ifdef IS_MPI |
26 |
use mpiSimulation |
27 |
#endif |
28 |
|
29 |
implicit none |
30 |
PRIVATE |
31 |
|
32 |
#define __FORTRAN90 |
33 |
#include "fForceField.h" |
34 |
#include "fSwitchingFunction.h" |
35 |
|
36 |
logical, save :: haveRlist = .false. |
37 |
logical, save :: haveNeighborList = .false. |
38 |
logical, save :: havePolicies = .false. |
39 |
logical, save :: haveSIMvariables = .false. |
40 |
logical, save :: havePropertyMap = .false. |
41 |
logical, save :: haveSaneForceField = .false. |
42 |
logical, save :: FF_uses_LJ |
43 |
logical, save :: FF_uses_sticky |
44 |
logical, save :: FF_uses_charges |
45 |
logical, save :: FF_uses_dipoles |
46 |
logical, save :: FF_uses_RF |
47 |
logical, save :: FF_uses_GB |
48 |
logical, save :: FF_uses_EAM |
49 |
logical, save :: SIM_uses_LJ |
50 |
logical, save :: SIM_uses_sticky |
51 |
logical, save :: SIM_uses_charges |
52 |
logical, save :: SIM_uses_dipoles |
53 |
logical, save :: SIM_uses_RF |
54 |
logical, save :: SIM_uses_GB |
55 |
logical, save :: SIM_uses_EAM |
56 |
logical, save :: SIM_requires_postpair_calc |
57 |
logical, save :: SIM_requires_prepair_calc |
58 |
logical, save :: SIM_uses_directional_atoms |
59 |
logical, save :: SIM_uses_PBC |
60 |
logical, save :: SIM_uses_molecular_cutoffs |
61 |
|
62 |
real(kind=dp), save :: rlist, rlistsq |
63 |
|
64 |
public :: init_FF |
65 |
public :: do_force_loop |
66 |
public :: setRlistDF |
67 |
|
68 |
#ifdef PROFILE |
69 |
public :: getforcetime |
70 |
real, save :: forceTime = 0 |
71 |
real :: forceTimeInitial, forceTimeFinal |
72 |
integer :: nLoops |
73 |
#endif |
74 |
|
75 |
type :: Properties |
76 |
logical :: is_lj = .false. |
77 |
logical :: is_sticky = .false. |
78 |
logical :: is_dp = .false. |
79 |
logical :: is_gb = .false. |
80 |
logical :: is_eam = .false. |
81 |
logical :: is_charge = .false. |
82 |
real(kind=DP) :: charge = 0.0_DP |
83 |
real(kind=DP) :: dipole_moment = 0.0_DP |
84 |
end type Properties |
85 |
|
86 |
type(Properties), dimension(:),allocatable :: PropertyMap |
87 |
|
88 |
contains |
89 |
|
90 |
subroutine setRlistDF( this_rlist ) |
91 |
|
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real(kind=dp) :: this_rlist |
93 |
|
94 |
rlist = this_rlist |
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rlistsq = rlist * rlist |
96 |
|
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haveRlist = .true. |
98 |
|
99 |
end subroutine setRlistDF |
100 |
|
101 |
subroutine createPropertyMap(status) |
102 |
integer :: nAtypes |
103 |
integer :: status |
104 |
integer :: i |
105 |
logical :: thisProperty |
106 |
real (kind=DP) :: thisDPproperty |
107 |
|
108 |
status = 0 |
109 |
|
110 |
nAtypes = getSize(atypes) |
111 |
|
112 |
if (nAtypes == 0) then |
113 |
status = -1 |
114 |
return |
115 |
end if |
116 |
|
117 |
if (.not. allocated(PropertyMap)) then |
118 |
allocate(PropertyMap(nAtypes)) |
119 |
endif |
120 |
|
121 |
do i = 1, nAtypes |
122 |
call getElementProperty(atypes, i, "is_LJ", thisProperty) |
123 |
PropertyMap(i)%is_LJ = thisProperty |
124 |
|
125 |
call getElementProperty(atypes, i, "is_Charge", thisProperty) |
126 |
PropertyMap(i)%is_Charge = thisProperty |
127 |
|
128 |
if (thisProperty) then |
129 |
call getElementProperty(atypes, i, "charge", thisDPproperty) |
130 |
PropertyMap(i)%charge = thisDPproperty |
131 |
endif |
132 |
|
133 |
call getElementProperty(atypes, i, "is_DP", thisProperty) |
134 |
PropertyMap(i)%is_DP = thisProperty |
135 |
|
136 |
if (thisProperty) then |
137 |
call getElementProperty(atypes, i, "dipole_moment", thisDPproperty) |
138 |
PropertyMap(i)%dipole_moment = thisDPproperty |
139 |
endif |
140 |
|
141 |
call getElementProperty(atypes, i, "is_Sticky", thisProperty) |
142 |
PropertyMap(i)%is_Sticky = thisProperty |
143 |
call getElementProperty(atypes, i, "is_GB", thisProperty) |
144 |
PropertyMap(i)%is_GB = thisProperty |
145 |
call getElementProperty(atypes, i, "is_EAM", thisProperty) |
146 |
PropertyMap(i)%is_EAM = thisProperty |
147 |
end do |
148 |
|
149 |
havePropertyMap = .true. |
150 |
|
151 |
end subroutine createPropertyMap |
152 |
|
153 |
subroutine setSimVariables() |
154 |
SIM_uses_LJ = SimUsesLJ() |
155 |
SIM_uses_sticky = SimUsesSticky() |
156 |
SIM_uses_charges = SimUsesCharges() |
157 |
SIM_uses_dipoles = SimUsesDipoles() |
158 |
SIM_uses_RF = SimUsesRF() |
159 |
SIM_uses_GB = SimUsesGB() |
160 |
SIM_uses_EAM = SimUsesEAM() |
161 |
SIM_requires_postpair_calc = SimRequiresPostpairCalc() |
162 |
SIM_requires_prepair_calc = SimRequiresPrepairCalc() |
163 |
SIM_uses_directional_atoms = SimUsesDirectionalAtoms() |
164 |
SIM_uses_PBC = SimUsesPBC() |
165 |
!SIM_uses_molecular_cutoffs = SimUsesMolecularCutoffs() |
166 |
|
167 |
haveSIMvariables = .true. |
168 |
|
169 |
return |
170 |
end subroutine setSimVariables |
171 |
|
172 |
subroutine doReadyCheck(error) |
173 |
integer, intent(out) :: error |
174 |
|
175 |
integer :: myStatus |
176 |
|
177 |
error = 0 |
178 |
|
179 |
if (.not. havePropertyMap) then |
180 |
|
181 |
myStatus = 0 |
182 |
|
183 |
call createPropertyMap(myStatus) |
184 |
|
185 |
if (myStatus .ne. 0) then |
186 |
write(default_error, *) 'createPropertyMap failed in do_Forces!' |
187 |
error = -1 |
188 |
return |
189 |
endif |
190 |
endif |
191 |
|
192 |
if (.not. haveSIMvariables) then |
193 |
call setSimVariables() |
194 |
endif |
195 |
|
196 |
if (.not. haveRlist) then |
197 |
write(default_error, *) 'rList has not been set in do_Forces!' |
198 |
error = -1 |
199 |
return |
200 |
endif |
201 |
|
202 |
if (SIM_uses_LJ .and. FF_uses_LJ) then |
203 |
if (.not. havePolicies) then |
204 |
write(default_error, *) 'LJ mixing Policies have not been set in do_Forces!' |
205 |
error = -1 |
206 |
return |
207 |
endif |
208 |
endif |
209 |
|
210 |
if (.not. haveNeighborList) then |
211 |
write(default_error, *) 'neighbor list has not been initialized in do_Forces!' |
212 |
error = -1 |
213 |
return |
214 |
end if |
215 |
|
216 |
if (.not. haveSaneForceField) then |
217 |
write(default_error, *) 'Force Field is not sane in do_Forces!' |
218 |
error = -1 |
219 |
return |
220 |
end if |
221 |
|
222 |
#ifdef IS_MPI |
223 |
if (.not. isMPISimSet()) then |
224 |
write(default_error,*) "ERROR: mpiSimulation has not been initialized!" |
225 |
error = -1 |
226 |
return |
227 |
endif |
228 |
#endif |
229 |
return |
230 |
end subroutine doReadyCheck |
231 |
|
232 |
|
233 |
subroutine init_FF(LJMIXPOLICY, use_RF_c, thisStat) |
234 |
|
235 |
integer, intent(in) :: LJMIXPOLICY |
236 |
logical, intent(in) :: use_RF_c |
237 |
|
238 |
integer, intent(out) :: thisStat |
239 |
integer :: my_status, nMatches |
240 |
integer, pointer :: MatchList(:) => null() |
241 |
real(kind=dp) :: rcut, rrf, rt, dielect |
242 |
|
243 |
!! assume things are copacetic, unless they aren't |
244 |
thisStat = 0 |
245 |
|
246 |
!! Fortran's version of a cast: |
247 |
FF_uses_RF = use_RF_c |
248 |
|
249 |
!! init_FF is called *after* all of the atom types have been |
250 |
!! defined in atype_module using the new_atype subroutine. |
251 |
!! |
252 |
!! this will scan through the known atypes and figure out what |
253 |
!! interactions are used by the force field. |
254 |
|
255 |
FF_uses_LJ = .false. |
256 |
FF_uses_sticky = .false. |
257 |
FF_uses_charges = .false. |
258 |
FF_uses_dipoles = .false. |
259 |
FF_uses_GB = .false. |
260 |
FF_uses_EAM = .false. |
261 |
|
262 |
call getMatchingElementList(atypes, "is_LJ", .true., nMatches, MatchList) |
263 |
if (nMatches .gt. 0) FF_uses_LJ = .true. |
264 |
|
265 |
call getMatchingElementList(atypes, "is_Charge", .true., nMatches, MatchList) |
266 |
if (nMatches .gt. 0) FF_uses_charges = .true. |
267 |
|
268 |
call getMatchingElementList(atypes, "is_DP", .true., nMatches, MatchList) |
269 |
if (nMatches .gt. 0) FF_uses_dipoles = .true. |
270 |
|
271 |
call getMatchingElementList(atypes, "is_Sticky", .true., nMatches, & |
272 |
MatchList) |
273 |
if (nMatches .gt. 0) FF_uses_Sticky = .true. |
274 |
|
275 |
call getMatchingElementList(atypes, "is_GB", .true., nMatches, MatchList) |
276 |
if (nMatches .gt. 0) FF_uses_GB = .true. |
277 |
|
278 |
call getMatchingElementList(atypes, "is_EAM", .true., nMatches, MatchList) |
279 |
if (nMatches .gt. 0) FF_uses_EAM = .true. |
280 |
|
281 |
!! Assume sanity (for the sake of argument) |
282 |
haveSaneForceField = .true. |
283 |
!! |
284 |
if (FF_uses_charges) then |
285 |
dielect = getDielect() |
286 |
call initialize_charge(dielect) |
287 |
endif |
288 |
|
289 |
|
290 |
!! check to make sure the FF_uses_RF setting makes sense |
291 |
|
292 |
if (FF_uses_dipoles) then |
293 |
if (FF_uses_RF) then |
294 |
dielect = getDielect() |
295 |
call initialize_rf(dielect) |
296 |
endif |
297 |
else |
298 |
if (FF_uses_RF) then |
299 |
write(default_error,*) 'Using Reaction Field with no dipoles? Huh?' |
300 |
thisStat = -1 |
301 |
haveSaneForceField = .false. |
302 |
return |
303 |
endif |
304 |
endif |
305 |
|
306 |
if (FF_uses_LJ) then |
307 |
|
308 |
select case (LJMIXPOLICY) |
309 |
case (LB_MIXING_RULE) |
310 |
call init_lj_FF(LB_MIXING_RULE, my_status) |
311 |
case (EXPLICIT_MIXING_RULE) |
312 |
call init_lj_FF(EXPLICIT_MIXING_RULE, my_status) |
313 |
case default |
314 |
write(default_error,*) 'unknown LJ Mixing Policy!' |
315 |
thisStat = -1 |
316 |
haveSaneForceField = .false. |
317 |
return |
318 |
end select |
319 |
if (my_status /= 0) then |
320 |
thisStat = -1 |
321 |
haveSaneForceField = .false. |
322 |
return |
323 |
end if |
324 |
havePolicies = .true. |
325 |
endif |
326 |
|
327 |
if (FF_uses_sticky) then |
328 |
call check_sticky_FF(my_status) |
329 |
if (my_status /= 0) then |
330 |
thisStat = -1 |
331 |
haveSaneForceField = .false. |
332 |
return |
333 |
end if |
334 |
endif |
335 |
|
336 |
|
337 |
if (FF_uses_EAM) then |
338 |
call init_EAM_FF(my_status) |
339 |
if (my_status /= 0) then |
340 |
write(default_error, *) "init_EAM_FF returned a bad status" |
341 |
thisStat = -1 |
342 |
haveSaneForceField = .false. |
343 |
return |
344 |
end if |
345 |
endif |
346 |
|
347 |
if (FF_uses_GB) then |
348 |
call check_gb_pair_FF(my_status) |
349 |
if (my_status .ne. 0) then |
350 |
thisStat = -1 |
351 |
haveSaneForceField = .false. |
352 |
return |
353 |
endif |
354 |
endif |
355 |
|
356 |
if (FF_uses_GB .and. FF_uses_LJ) then |
357 |
endif |
358 |
if (.not. haveNeighborList) then |
359 |
!! Create neighbor lists |
360 |
call expandNeighborList(nLocal, my_status) |
361 |
if (my_Status /= 0) then |
362 |
write(default_error,*) "SimSetup: ExpandNeighborList returned error." |
363 |
thisStat = -1 |
364 |
return |
365 |
endif |
366 |
haveNeighborList = .true. |
367 |
endif |
368 |
|
369 |
|
370 |
|
371 |
end subroutine init_FF |
372 |
|
373 |
|
374 |
!! Does force loop over i,j pairs. Calls do_pair to calculates forces. |
375 |
!-------------------------------------------------------------> |
376 |
subroutine do_force_loop(q, q_group, A, u_l, f, t, tau, pot, & |
377 |
do_pot_c, do_stress_c, error) |
378 |
!! Position array provided by C, dimensioned by getNlocal |
379 |
real ( kind = dp ), dimension(3,nLocal) :: q |
380 |
!! molecular center-of-mass position array |
381 |
real ( kind = dp ), dimension(3,nGroup) :: q_group |
382 |
!! Rotation Matrix for each long range particle in simulation. |
383 |
real( kind = dp), dimension(9,nLocal) :: A |
384 |
!! Unit vectors for dipoles (lab frame) |
385 |
real( kind = dp ), dimension(3,nLocal) :: u_l |
386 |
!! Force array provided by C, dimensioned by getNlocal |
387 |
real ( kind = dp ), dimension(3,nLocal) :: f |
388 |
!! Torsion array provided by C, dimensioned by getNlocal |
389 |
real( kind = dp ), dimension(3,nLocal) :: t |
390 |
|
391 |
!! Stress Tensor |
392 |
real( kind = dp), dimension(9) :: tau |
393 |
real ( kind = dp ) :: pot |
394 |
logical ( kind = 2) :: do_pot_c, do_stress_c |
395 |
logical :: do_pot |
396 |
logical :: do_stress |
397 |
logical :: in_switching_region |
398 |
#ifdef IS_MPI |
399 |
real( kind = DP ) :: pot_local |
400 |
integer :: nrow |
401 |
integer :: ncol |
402 |
integer :: nprocs |
403 |
integer :: nrow_group |
404 |
integer :: ncol_group |
405 |
#endif |
406 |
integer :: natoms |
407 |
logical :: update_nlist |
408 |
integer :: i, j, jbeg, jend, jnab |
409 |
integer :: ia, jb, atom1, atom2 |
410 |
integer :: nlist |
411 |
real( kind = DP ) :: ratmsq, rgrpsq, rgrp, vpair, vab |
412 |
real( kind = DP ) :: sw, dswdr, swderiv, mf |
413 |
real(kind=dp),dimension(3) :: d_atm, d_grp |
414 |
real(kind=dp) :: rfpot, mu_i, virial |
415 |
integer :: me_i, me_j |
416 |
logical :: is_dp_i |
417 |
integer :: neighborListSize |
418 |
integer :: listerror, error |
419 |
integer :: localError |
420 |
integer :: propPack_i, propPack_j |
421 |
|
422 |
real(kind=dp) :: listSkin = 1.0 |
423 |
|
424 |
!! initialize local variables |
425 |
|
426 |
#ifdef IS_MPI |
427 |
pot_local = 0.0_dp |
428 |
nrow = getNrow(plan_row) |
429 |
ncol = getNcol(plan_col) |
430 |
nrow_group = getNrowGroup(plan_row) |
431 |
ncol_group = getNcolGroup(plan_col) |
432 |
#else |
433 |
natoms = nlocal |
434 |
#endif |
435 |
|
436 |
call doReadyCheck(localError) |
437 |
if ( localError .ne. 0 ) then |
438 |
call handleError("do_force_loop", "Not Initialized") |
439 |
error = -1 |
440 |
return |
441 |
end if |
442 |
call zero_work_arrays() |
443 |
|
444 |
do_pot = do_pot_c |
445 |
do_stress = do_stress_c |
446 |
|
447 |
! Gather all information needed by all force loops: |
448 |
|
449 |
#ifdef IS_MPI |
450 |
|
451 |
call gather(q, q_Row, plan_row3d) |
452 |
call gather(q, q_Col, plan_col3d) |
453 |
|
454 |
call gather(q_group, q_group_Row, plan_row_Group_3d) |
455 |
call gather(q_group, q_group_Col, plan_col_Group_3d) |
456 |
|
457 |
if (FF_UsesDirectionalAtoms() .and. SIM_uses_directional_atoms) then |
458 |
call gather(u_l,u_l_Row,plan_row3d) |
459 |
call gather(u_l,u_l_Col,plan_col3d) |
460 |
|
461 |
call gather(A,A_Row,plan_row_rotation) |
462 |
call gather(A,A_Col,plan_col_rotation) |
463 |
endif |
464 |
|
465 |
#endif |
466 |
|
467 |
!! Begin force loop timing: |
468 |
#ifdef PROFILE |
469 |
call cpu_time(forceTimeInitial) |
470 |
nloops = nloops + 1 |
471 |
#endif |
472 |
|
473 |
if (FF_RequiresPrepairCalc() .and. SIM_requires_prepair_calc) then |
474 |
!! See if we need to update neighbor lists |
475 |
|
476 |
call checkNeighborList(nGroup, q_group, listSkin, update_nlist) |
477 |
|
478 |
!! if_mpi_gather_stuff_for_prepair |
479 |
!! do_prepair_loop_if_needed |
480 |
!! if_mpi_scatter_stuff_from_prepair |
481 |
!! if_mpi_gather_stuff_from_prepair_to_main_loop |
482 |
|
483 |
!--------------------PREFORCE LOOP----------->>>>>>>>>>>>>>>>>>>>>>>>>>> |
484 |
#ifdef IS_MPI |
485 |
|
486 |
if (update_nlist) then |
487 |
|
488 |
!! save current configuration, construct neighbor list, |
489 |
!! and calculate forces |
490 |
|
491 |
call saveNeighborList(nGroup, q_group) |
492 |
|
493 |
neighborListSize = size(list) |
494 |
nlist = 0 |
495 |
|
496 |
do i = 1, nrow_group |
497 |
point(i) = nlist + 1 |
498 |
|
499 |
do j = 1, ncol_group |
500 |
|
501 |
call get_interatomic_vector(q_group_Row(:,i), & |
502 |
q_group_Col(:,j), d_grp, rgrpsq) |
503 |
|
504 |
if (rgrpsq < rlistsq) then |
505 |
nlist = nlist + 1 |
506 |
|
507 |
if (nlist > neighborListSize) then |
508 |
call expandNeighborList(nGroup, listerror) |
509 |
if (listerror /= 0) then |
510 |
error = -1 |
511 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
512 |
return |
513 |
end if |
514 |
neighborListSize = size(list) |
515 |
endif |
516 |
|
517 |
list(nlist) = j |
518 |
|
519 |
do ia = groupStart(i), groupStart(i+1)-1 |
520 |
atom1 = groupList(ia) |
521 |
|
522 |
prepair_inner: do jb = groupStart(j), groupStart(j+1)-1 |
523 |
atom2 = groupList(jb) |
524 |
|
525 |
if (skipThisPair(atom1, atom2)) cycle prepair_inner |
526 |
|
527 |
call get_interatomic_vector(q_Row(:,atom1), & |
528 |
q_Col(:,atom2), d_atm, ratmsq) |
529 |
|
530 |
call do_prepair(atom1, atom2, ratmsq, d_atm, & |
531 |
rgrpsq, d_grp, do_pot, do_stress, & |
532 |
u_l, A, f, t, pot_local) |
533 |
|
534 |
enddo prepair_inner |
535 |
enddo |
536 |
end if |
537 |
enddo |
538 |
enddo |
539 |
point(nrow_group + 1) = nlist + 1 |
540 |
|
541 |
else !! (of update_check) |
542 |
|
543 |
! use the list to find the neighbors |
544 |
do i = 1, nrow_group |
545 |
JBEG = POINT(i) |
546 |
JEND = POINT(i+1) - 1 |
547 |
! check that group i has neighbors |
548 |
if (jbeg .le. jend) then |
549 |
|
550 |
do jnab = jbeg, jend |
551 |
j = list(jnab) |
552 |
|
553 |
do ia = groupStart(i), groupStart(i+1)-1 |
554 |
atom1 = groupList(ia) |
555 |
|
556 |
do jb = groupStart(j), groupStart(j+1)-1 |
557 |
atom2 = groupList(jb) |
558 |
|
559 |
call get_interatomic_vector(q_Row(:,atom1), & |
560 |
q_Col(:,atom2), d_atm, ratmsq) |
561 |
|
562 |
call do_prepair(atom1, atom2, ratmsq, d_atm, & |
563 |
rgrpsq, d_grp, do_pot, do_stress, & |
564 |
u_l, A, f, t, pot_local) |
565 |
|
566 |
enddo |
567 |
enddo |
568 |
enddo |
569 |
endif |
570 |
enddo |
571 |
endif |
572 |
|
573 |
#else |
574 |
|
575 |
if (update_nlist) then |
576 |
|
577 |
!! save current configuration, construct neighbor list, |
578 |
!! and calculate forces |
579 |
|
580 |
call saveNeighborList(nGroup, q_group) |
581 |
|
582 |
neighborListSize = size(list) |
583 |
nlist = 0 |
584 |
|
585 |
do i = 1, nGroup-1 |
586 |
point(i) = nlist + 1 |
587 |
|
588 |
do j = i+1, nGroup |
589 |
|
590 |
call get_interatomic_vector(q_group(:,i), & |
591 |
q_group(:,j), d_grp, rgrpsq) |
592 |
|
593 |
if (rgrpsq < rlistsq) then |
594 |
nlist = nlist + 1 |
595 |
|
596 |
if (nlist > neighborListSize) then |
597 |
call expandNeighborList(nGroup, listerror) |
598 |
if (listerror /= 0) then |
599 |
error = -1 |
600 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
601 |
return |
602 |
end if |
603 |
neighborListSize = size(list) |
604 |
endif |
605 |
|
606 |
list(nlist) = j |
607 |
|
608 |
do ia = groupStart(i), groupStart(i+1)-1 |
609 |
atom1 = groupList(ia) |
610 |
|
611 |
prepair_inner: do jb = groupStart(j), groupStart(j+1)-1 |
612 |
atom2 = groupList(jb) |
613 |
|
614 |
if (skipThisPair(atom1, atom2)) cycle prepair_inner |
615 |
|
616 |
call get_interatomic_vector(q(:,atom1), & |
617 |
q(:,atom2), d_atm, ratmsq) |
618 |
|
619 |
call do_prepair(atom1, atom2, ratmsq, d_atm, & |
620 |
rgrpsq, d_grp, do_pot, do_stress, & |
621 |
u_l, A, f, t, pot) |
622 |
|
623 |
enddo prepair_inner |
624 |
enddo |
625 |
end if |
626 |
enddo |
627 |
enddo |
628 |
point(nGroup) = nlist + 1 |
629 |
|
630 |
else !! (of update_check) |
631 |
|
632 |
! use the list to find the neighbors |
633 |
do i = 1, nGroup-1 |
634 |
JBEG = POINT(i) |
635 |
JEND = POINT(i+1) - 1 |
636 |
! check that group i has neighbors |
637 |
if (jbeg .le. jend) then |
638 |
|
639 |
do jnab = jbeg, jend |
640 |
j = list(jnab) |
641 |
|
642 |
do ia = groupStart(i), groupStart(i+1)-1 |
643 |
atom1 = groupList(ia) |
644 |
|
645 |
do jb = groupStart(j), groupStart(j+1)-1 |
646 |
atom2 = groupList(jb) |
647 |
|
648 |
call get_interatomic_vector(q(:,atom1), & |
649 |
q(:,atom2), d_atm, ratmsq) |
650 |
|
651 |
call do_prepair(atom1, atom2, ratmsq, d_atm, & |
652 |
rgrpsq, d_grp, do_pot, do_stress, & |
653 |
u_l, A, f, t, pot) |
654 |
|
655 |
enddo |
656 |
enddo |
657 |
enddo |
658 |
endif |
659 |
enddo |
660 |
endif |
661 |
|
662 |
#endif |
663 |
|
664 |
!! Do rest of preforce calculations |
665 |
!! do necessary preforce calculations |
666 |
call do_preforce(nlocal,pot) |
667 |
! we have already updated the neighbor list set it to false... |
668 |
update_nlist = .false. |
669 |
else |
670 |
!! See if we need to update neighbor lists for non pre-pair |
671 |
call checkNeighborList(nGroup, q_group, listSkin, update_nlist) |
672 |
endif |
673 |
|
674 |
!---------------------------------MAIN Pair LOOP->>>>>>>>>>>>> |
675 |
|
676 |
#ifdef IS_MPI |
677 |
|
678 |
if (update_nlist) then |
679 |
|
680 |
!! save current configuration, construct neighbor list, |
681 |
!! and calculate forces |
682 |
|
683 |
call saveNeighborList(nGroup, q_group) |
684 |
|
685 |
neighborListSize = size(list) |
686 |
nlist = 0 |
687 |
|
688 |
do i = 1, nrow_group |
689 |
point(i) = nlist + 1 |
690 |
|
691 |
do j = 1, ncol_group |
692 |
|
693 |
call get_interatomic_vector(q_group_Row(:,i), & |
694 |
q_group_Col(:,j), d_grp, rgrpsq) |
695 |
|
696 |
if (rgrpsq < rlistsq) then |
697 |
nlist = nlist + 1 |
698 |
|
699 |
if (nlist > neighborListSize) then |
700 |
call expandNeighborList(nGroup, listerror) |
701 |
if (listerror /= 0) then |
702 |
error = -1 |
703 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
704 |
return |
705 |
end if |
706 |
neighborListSize = size(list) |
707 |
endif |
708 |
|
709 |
list(nlist) = j |
710 |
|
711 |
vab = 0.0d0 |
712 |
call get_switch(rgrpsq, sw, dswdr, rgrp, group_switch, & |
713 |
in_switching_region) |
714 |
|
715 |
do ia = groupStart(i), groupStart(i+1)-1 |
716 |
atom1 = groupList(ia) |
717 |
|
718 |
inner: do jb = groupStart(j), groupStart(j+1)-1 |
719 |
atom2 = groupList(jb) |
720 |
|
721 |
if (skipThisPair(atom1, atom2)) cycle inner |
722 |
|
723 |
call get_interatomic_vector(q_Row(:,atom1), & |
724 |
q_Col(:,atom2), d_atm, ratmsq) |
725 |
|
726 |
call do_pair(atom1, atom2, ratmsq, d_atm, sw, & |
727 |
do_pot, do_stress, & |
728 |
u_l, A, f, t, pot_local, vpair) |
729 |
|
730 |
vab = vab + vpair |
731 |
enddo inner |
732 |
enddo |
733 |
|
734 |
if (in_switching_region) then |
735 |
swderiv = vab*dswdr/rgrp |
736 |
|
737 |
do ia=groupStart(i), groupStart(i+1)-1 |
738 |
atom1=groupList(ia) |
739 |
mf = mfact(atom1) |
740 |
f_Row(1,atom1) = f_Row(1,atom1) - swderiv*d_grp(1)*mf |
741 |
f_Row(2,atom1) = f_Row(2,atom1) - swderiv*d_grp(2)*mf |
742 |
f_Row(3,atom1) = f_Row(3,atom1) - swderiv*d_grp(3)*mf |
743 |
enddo |
744 |
|
745 |
do jb=groupStart(j), groupStart(j+1)-1 |
746 |
atom2=groupList(jb) |
747 |
mf = mfact(atom2) |
748 |
f_Col(1,atom2) = f_Col(1,atom2) + swderiv*d_grp(1)*mf |
749 |
f_Col(2,atom2) = f_Col(2,atom2) + swderiv*d_grp(2)*mf |
750 |
f_Col(3,atom2) = f_Col(3,atom2) + swderiv*d_grp(3)*mf |
751 |
enddo |
752 |
endif |
753 |
|
754 |
end if |
755 |
enddo |
756 |
enddo |
757 |
point(nrow_group + 1) = nlist + 1 |
758 |
|
759 |
else !! (of update_check) |
760 |
|
761 |
! use the list to find the neighbors |
762 |
do i = 1, nrow_group |
763 |
JBEG = POINT(i) |
764 |
JEND = POINT(i+1) - 1 |
765 |
! check that group i has neighbors |
766 |
if (jbeg .le. jend) then |
767 |
|
768 |
do jnab = jbeg, jend |
769 |
j = list(jnab) |
770 |
|
771 |
call get_interatomic_vector(q_group_Row(:,i), & |
772 |
q_group_Col(:,j), d_grp, rgrpsq) |
773 |
|
774 |
vab = 0.0d0 |
775 |
call get_switch(rgrpsq, sw, dswdr, rgrp, group_switch, & |
776 |
in_switching_region) |
777 |
|
778 |
do ia = groupStart(i), groupStart(i+1)-1 |
779 |
atom1 = groupList(ia) |
780 |
|
781 |
do jb = groupStart(j), groupStart(j+1)-1 |
782 |
atom2 = groupList(jb) |
783 |
|
784 |
call get_interatomic_vector(q_Row(:,atom1), & |
785 |
q_Col(:,atom2), d_atm, ratmsq) |
786 |
|
787 |
call do_pair(atom1, atom2, ratmsq, d_atm, sw, & |
788 |
do_pot, do_stress, & |
789 |
u_l, A, f, t, pot_local, vpair) |
790 |
|
791 |
vab = vab + vpair |
792 |
|
793 |
enddo |
794 |
enddo |
795 |
|
796 |
if (in_switching_region) then |
797 |
swderiv = vab*dswdr/rgrp |
798 |
|
799 |
do ia=groupStart(i), groupStart(i+1)-1 |
800 |
atom1=groupList(ia) |
801 |
mf = mfact(atom1) |
802 |
f_Row(1,atom1) = f_Row(1,atom1) - swderiv*d_grp(1)*mf |
803 |
f_Row(2,atom1) = f_Row(2,atom1) - swderiv*d_grp(2)*mf |
804 |
f_Row(3,atom1) = f_Row(3,atom1) - swderiv*d_grp(3)*mf |
805 |
enddo |
806 |
|
807 |
do jb=groupStart(j), groupStart(j+1)-1 |
808 |
atom2=groupList(jb) |
809 |
mf = mfact(atom2) |
810 |
f_Col(1,atom2) = f_Col(1,atom2) + swderiv*d_grp(1)*mf |
811 |
f_Col(2,atom2) = f_Col(2,atom2) + swderiv*d_grp(2)*mf |
812 |
f_Col(3,atom2) = f_Col(3,atom2) + swderiv*d_grp(3)*mf |
813 |
enddo |
814 |
endif |
815 |
|
816 |
enddo |
817 |
endif |
818 |
enddo |
819 |
endif |
820 |
|
821 |
#else |
822 |
|
823 |
if (update_nlist) then |
824 |
|
825 |
!! save current configuration, construct neighbor list, |
826 |
!! and calculate forces |
827 |
|
828 |
call saveNeighborList(nGroup, q_group) |
829 |
|
830 |
neighborListSize = size(list) |
831 |
nlist = 0 |
832 |
|
833 |
do i = 1, nGroup-1 |
834 |
point(i) = nlist + 1 |
835 |
|
836 |
do j = i+1, nGroup |
837 |
|
838 |
call get_interatomic_vector(q_group(:,i), & |
839 |
q_group(:,j), d_grp, rgrpsq) |
840 |
|
841 |
if (rgrpsq < rlistsq) then |
842 |
nlist = nlist + 1 |
843 |
|
844 |
if (nlist > neighborListSize) then |
845 |
call expandNeighborList(nGroup, listerror) |
846 |
if (listerror /= 0) then |
847 |
error = -1 |
848 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
849 |
return |
850 |
end if |
851 |
neighborListSize = size(list) |
852 |
endif |
853 |
|
854 |
list(nlist) = j |
855 |
|
856 |
vab = 0.0d0 |
857 |
call get_switch(rgrpsq, sw, dswdr, rgrp, group_switch, & |
858 |
in_switching_region) |
859 |
|
860 |
do ia = groupStart(i), groupStart(i+1)-1 |
861 |
atom1 = groupList(ia) |
862 |
|
863 |
inner: do jb = groupStart(j), groupStart(j+1)-1 |
864 |
atom2 = groupList(jb) |
865 |
|
866 |
if (skipThisPair(atom1, atom2)) cycle inner |
867 |
|
868 |
call get_interatomic_vector(q(:,atom1), & |
869 |
q(:,atom2), d_atm, ratmsq) |
870 |
|
871 |
call do_pair(atom1, atom2, ratmsq, d_atm, sw, & |
872 |
do_pot, do_stress, & |
873 |
u_l, A, f, t, pot, vpair) |
874 |
|
875 |
vab = vab + vpair |
876 |
|
877 |
enddo inner |
878 |
enddo |
879 |
|
880 |
if (in_switching_region) then |
881 |
swderiv = vab*dswdr/rgrp |
882 |
do ia=groupStart(i), groupStart(i+1)-1 |
883 |
atom1=groupList(ia) |
884 |
mf = mfact(atom1) |
885 |
f(1,atom1) = f(1,atom1) - swderiv*d_grp(1)*mf |
886 |
f(2,atom1) = f(2,atom1) - swderiv*d_grp(2)*mf |
887 |
f(3,atom1) = f(3,atom1) - swderiv*d_grp(3)*mf |
888 |
enddo |
889 |
|
890 |
do jb=groupStart(j), groupStart(j+1)-1 |
891 |
atom2=groupList(jb) |
892 |
mf = mfact(atom2) |
893 |
f(1,atom2) = f(1,atom2) + swderiv*d_grp(1)*mf |
894 |
f(2,atom2) = f(2,atom2) + swderiv*d_grp(2)*mf |
895 |
f(3,atom2) = f(3,atom2) + swderiv*d_grp(3)*mf |
896 |
enddo |
897 |
endif |
898 |
|
899 |
end if |
900 |
enddo |
901 |
enddo |
902 |
point(nGroup) = nlist + 1 |
903 |
|
904 |
else !! (of update_check) |
905 |
|
906 |
! use the list to find the neighbors |
907 |
do i = 1, nGroup-1 |
908 |
JBEG = POINT(i) |
909 |
JEND = POINT(i+1) - 1 |
910 |
! check that group i has neighbors |
911 |
if (jbeg .le. jend) then |
912 |
|
913 |
do jnab = jbeg, jend |
914 |
j = list(jnab) |
915 |
|
916 |
call get_interatomic_vector(q_group(:,i), & |
917 |
q_group(:,j), d_grp, rgrpsq) |
918 |
|
919 |
vab = 0.0d0 |
920 |
call get_switch(rgrpsq, sw, dswdr, rgrp, group_switch, & |
921 |
in_switching_region) |
922 |
|
923 |
do ia = groupStart(i), groupStart(i+1)-1 |
924 |
atom1 = groupList(ia) |
925 |
|
926 |
do jb = groupStart(j), groupStart(j+1)-1 |
927 |
atom2 = groupList(jb) |
928 |
|
929 |
call get_interatomic_vector(q(:,atom1), & |
930 |
q(:,atom2), d_atm, ratmsq) |
931 |
|
932 |
call do_pair(atom1, atom2, ratmsq, d_atm, sw, & |
933 |
do_pot, do_stress, & |
934 |
u_l, A, f, t, pot, vpair) |
935 |
|
936 |
vab = vab + vpair |
937 |
|
938 |
enddo |
939 |
enddo |
940 |
|
941 |
if (in_switching_region) then |
942 |
swderiv = vab*dswdr/rgrp |
943 |
|
944 |
do ia=groupStart(i), groupStart(i+1)-1 |
945 |
atom1=groupList(ia) |
946 |
mf = mfact(atom1) |
947 |
f(1,atom1) = f(1,atom1) - swderiv*d_grp(1)*mf |
948 |
f(2,atom1) = f(2,atom1) - swderiv*d_grp(2)*mf |
949 |
f(3,atom1) = f(3,atom1) - swderiv*d_grp(3)*mf |
950 |
enddo |
951 |
|
952 |
do jb=groupStart(j), groupStart(j+1)-1 |
953 |
atom2=groupList(jb) |
954 |
mf = mfact(atom2) |
955 |
f(1,atom2) = f(1,atom2) + swderiv*d_grp(1)*mf |
956 |
f(2,atom2) = f(2,atom2) + swderiv*d_grp(2)*mf |
957 |
f(3,atom2) = f(3,atom2) + swderiv*d_grp(3)*mf |
958 |
enddo |
959 |
endif |
960 |
enddo |
961 |
endif |
962 |
enddo |
963 |
endif |
964 |
|
965 |
#endif |
966 |
|
967 |
! phew, done with main loop. |
968 |
|
969 |
!! Do timing |
970 |
#ifdef PROFILE |
971 |
call cpu_time(forceTimeFinal) |
972 |
forceTime = forceTime + forceTimeFinal - forceTimeInitial |
973 |
#endif |
974 |
|
975 |
#ifdef IS_MPI |
976 |
!!distribute forces |
977 |
|
978 |
f_temp = 0.0_dp |
979 |
call scatter(f_Row,f_temp,plan_row3d) |
980 |
do i = 1,nlocal |
981 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
982 |
end do |
983 |
|
984 |
f_temp = 0.0_dp |
985 |
call scatter(f_Col,f_temp,plan_col3d) |
986 |
do i = 1,nlocal |
987 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
988 |
end do |
989 |
|
990 |
if (FF_UsesDirectionalAtoms() .and. SIM_uses_directional_atoms) then |
991 |
t_temp = 0.0_dp |
992 |
call scatter(t_Row,t_temp,plan_row3d) |
993 |
do i = 1,nlocal |
994 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
995 |
end do |
996 |
t_temp = 0.0_dp |
997 |
call scatter(t_Col,t_temp,plan_col3d) |
998 |
|
999 |
do i = 1,nlocal |
1000 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
1001 |
end do |
1002 |
endif |
1003 |
|
1004 |
if (do_pot) then |
1005 |
! scatter/gather pot_row into the members of my column |
1006 |
call scatter(pot_Row, pot_Temp, plan_row) |
1007 |
|
1008 |
! scatter/gather pot_local into all other procs |
1009 |
! add resultant to get total pot |
1010 |
do i = 1, nlocal |
1011 |
pot_local = pot_local + pot_Temp(i) |
1012 |
enddo |
1013 |
|
1014 |
pot_Temp = 0.0_DP |
1015 |
|
1016 |
call scatter(pot_Col, pot_Temp, plan_col) |
1017 |
do i = 1, nlocal |
1018 |
pot_local = pot_local + pot_Temp(i) |
1019 |
enddo |
1020 |
|
1021 |
endif |
1022 |
#endif |
1023 |
|
1024 |
if (FF_RequiresPostpairCalc() .and. SIM_requires_postpair_calc) then |
1025 |
|
1026 |
if (FF_uses_RF .and. SIM_uses_RF) then |
1027 |
|
1028 |
#ifdef IS_MPI |
1029 |
call scatter(rf_Row,rf,plan_row3d) |
1030 |
call scatter(rf_Col,rf_Temp,plan_col3d) |
1031 |
do i = 1,nlocal |
1032 |
rf(1:3,i) = rf(1:3,i) + rf_Temp(1:3,i) |
1033 |
end do |
1034 |
#endif |
1035 |
|
1036 |
do i = 1, nLocal |
1037 |
|
1038 |
rfpot = 0.0_DP |
1039 |
#ifdef IS_MPI |
1040 |
me_i = atid_row(i) |
1041 |
#else |
1042 |
me_i = atid(i) |
1043 |
#endif |
1044 |
|
1045 |
if (PropertyMap(me_i)%is_DP) then |
1046 |
|
1047 |
mu_i = PropertyMap(me_i)%dipole_moment |
1048 |
|
1049 |
!! The reaction field needs to include a self contribution |
1050 |
!! to the field: |
1051 |
call accumulate_self_rf(i, mu_i, u_l) |
1052 |
!! Get the reaction field contribution to the |
1053 |
!! potential and torques: |
1054 |
call reaction_field_final(i, mu_i, u_l, rfpot, t, do_pot) |
1055 |
#ifdef IS_MPI |
1056 |
pot_local = pot_local + rfpot |
1057 |
#else |
1058 |
pot = pot + rfpot |
1059 |
|
1060 |
#endif |
1061 |
endif |
1062 |
enddo |
1063 |
endif |
1064 |
endif |
1065 |
|
1066 |
|
1067 |
#ifdef IS_MPI |
1068 |
|
1069 |
if (do_pot) then |
1070 |
pot = pot + pot_local |
1071 |
!! we assume the c code will do the allreduce to get the total potential |
1072 |
!! we could do it right here if we needed to... |
1073 |
endif |
1074 |
|
1075 |
if (do_stress) then |
1076 |
call mpi_allreduce(tau_Temp, tau, 9,mpi_double_precision,mpi_sum, & |
1077 |
mpi_comm_world,mpi_err) |
1078 |
call mpi_allreduce(virial_Temp, virial,1,mpi_double_precision,mpi_sum, & |
1079 |
mpi_comm_world,mpi_err) |
1080 |
endif |
1081 |
|
1082 |
#else |
1083 |
|
1084 |
if (do_stress) then |
1085 |
tau = tau_Temp |
1086 |
virial = virial_Temp |
1087 |
endif |
1088 |
|
1089 |
#endif |
1090 |
|
1091 |
|
1092 |
end subroutine do_force_loop |
1093 |
|
1094 |
|
1095 |
subroutine do_pair(i, j, rijsq, d, sw, do_pot, do_stress, & |
1096 |
u_l, A, f, t, pot, vpair) |
1097 |
|
1098 |
real( kind = dp ) :: pot, vpair, sw |
1099 |
real( kind = dp ), dimension(nLocal) :: mfact |
1100 |
real( kind = dp ), dimension(3,nLocal) :: u_l |
1101 |
real( kind = dp ), dimension(9,nLocal) :: A |
1102 |
real( kind = dp ), dimension(3,nLocal) :: f |
1103 |
real( kind = dp ), dimension(3,nLocal) :: t |
1104 |
|
1105 |
logical, intent(inout) :: do_pot, do_stress |
1106 |
integer, intent(in) :: i, j |
1107 |
real ( kind = dp ), intent(inout) :: rijsq |
1108 |
real ( kind = dp ) :: r |
1109 |
real ( kind = dp ), intent(inout) :: d(3) |
1110 |
integer :: me_i, me_j |
1111 |
|
1112 |
r = sqrt(rijsq) |
1113 |
|
1114 |
#ifdef IS_MPI |
1115 |
if (tagRow(i) .eq. tagColumn(j)) then |
1116 |
write(0,*) 'do_pair is doing', i , j, tagRow(i), tagColumn(j) |
1117 |
endif |
1118 |
me_i = atid_row(i) |
1119 |
me_j = atid_col(j) |
1120 |
#else |
1121 |
me_i = atid(i) |
1122 |
me_j = atid(j) |
1123 |
#endif |
1124 |
|
1125 |
if (FF_uses_LJ .and. SIM_uses_LJ) then |
1126 |
|
1127 |
if ( PropertyMap(me_i)%is_LJ .and. PropertyMap(me_j)%is_LJ ) then |
1128 |
call do_lj_pair(i, j, d, r, rijsq, sw, vpair, pot, f, do_pot, & |
1129 |
do_stress) |
1130 |
endif |
1131 |
|
1132 |
endif |
1133 |
|
1134 |
if (FF_uses_charges .and. SIM_uses_charges) then |
1135 |
|
1136 |
if (PropertyMap(me_i)%is_Charge .and. PropertyMap(me_j)%is_Charge) then |
1137 |
call do_charge_pair(i, j, d, r, rijsq, sw, vpair, pot, f, do_pot, & |
1138 |
do_stress) |
1139 |
endif |
1140 |
|
1141 |
endif |
1142 |
|
1143 |
if (FF_uses_dipoles .and. SIM_uses_dipoles) then |
1144 |
|
1145 |
if ( PropertyMap(me_i)%is_DP .and. PropertyMap(me_j)%is_DP) then |
1146 |
call do_dipole_pair(i, j, d, r, rijsq, sw, vpair, pot, u_l, f, t, & |
1147 |
do_pot, do_stress) |
1148 |
if (FF_uses_RF .and. SIM_uses_RF) then |
1149 |
call accumulate_rf(i, j, r, u_l) |
1150 |
call rf_correct_forces(i, j, d, r, u_l, f, do_stress) |
1151 |
endif |
1152 |
endif |
1153 |
|
1154 |
endif |
1155 |
|
1156 |
if (FF_uses_Sticky .and. SIM_uses_sticky) then |
1157 |
|
1158 |
if ( PropertyMap(me_i)%is_Sticky .and. PropertyMap(me_j)%is_Sticky) then |
1159 |
call do_sticky_pair(i, j, d, r, rijsq, sw, vpair, pot, A, f, t, & |
1160 |
do_pot, do_stress) |
1161 |
endif |
1162 |
|
1163 |
endif |
1164 |
|
1165 |
|
1166 |
if (FF_uses_GB .and. SIM_uses_GB) then |
1167 |
|
1168 |
if ( PropertyMap(me_i)%is_GB .and. PropertyMap(me_j)%is_GB) then |
1169 |
call do_gb_pair(i, j, d, r, rijsq, sw, vpair, pot, u_l, f, t, & |
1170 |
do_pot, do_stress) |
1171 |
endif |
1172 |
|
1173 |
endif |
1174 |
|
1175 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
1176 |
|
1177 |
if ( PropertyMap(me_i)%is_EAM .and. PropertyMap(me_j)%is_EAM) then |
1178 |
call do_eam_pair(i, j, d, r, rijsq, sw, vpair, pot, f, & |
1179 |
do_pot, do_stress) |
1180 |
endif |
1181 |
|
1182 |
endif |
1183 |
|
1184 |
end subroutine do_pair |
1185 |
|
1186 |
subroutine do_prepair(i, j, rijsq, d, rcijsq, dc, & |
1187 |
do_pot, do_stress, u_l, A, f, t, pot) |
1188 |
real( kind = dp ) :: pot |
1189 |
real( kind = dp ), dimension(3,nLocal) :: u_l |
1190 |
real (kind=dp), dimension(9,nLocal) :: A |
1191 |
real (kind=dp), dimension(3,nLocal) :: f |
1192 |
real (kind=dp), dimension(3,nLocal) :: t |
1193 |
|
1194 |
logical, intent(inout) :: do_pot, do_stress |
1195 |
integer, intent(in) :: i, j |
1196 |
real ( kind = dp ), intent(inout) :: rijsq, rcijsq |
1197 |
real ( kind = dp ) :: r, rc |
1198 |
real ( kind = dp ), intent(inout) :: d(3), dc(3) |
1199 |
|
1200 |
logical :: is_EAM_i, is_EAM_j |
1201 |
|
1202 |
integer :: me_i, me_j |
1203 |
|
1204 |
|
1205 |
r = sqrt(rijsq) |
1206 |
if (SIM_uses_molecular_cutoffs) then |
1207 |
rc = sqrt(rcijsq) |
1208 |
else |
1209 |
rc = r |
1210 |
endif |
1211 |
|
1212 |
|
1213 |
#ifdef IS_MPI |
1214 |
if (tagRow(i) .eq. tagColumn(j)) then |
1215 |
write(0,*) 'do_pair is doing', i , j, tagRow(i), tagColumn(j) |
1216 |
endif |
1217 |
|
1218 |
me_i = atid_row(i) |
1219 |
me_j = atid_col(j) |
1220 |
|
1221 |
#else |
1222 |
|
1223 |
me_i = atid(i) |
1224 |
me_j = atid(j) |
1225 |
|
1226 |
#endif |
1227 |
|
1228 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
1229 |
|
1230 |
if (PropertyMap(me_i)%is_EAM .and. PropertyMap(me_j)%is_EAM) & |
1231 |
call calc_EAM_prepair_rho(i, j, d, r, rijsq ) |
1232 |
|
1233 |
endif |
1234 |
|
1235 |
end subroutine do_prepair |
1236 |
|
1237 |
|
1238 |
|
1239 |
|
1240 |
subroutine do_preforce(nlocal,pot) |
1241 |
integer :: nlocal |
1242 |
real( kind = dp ) :: pot |
1243 |
|
1244 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
1245 |
call calc_EAM_preforce_Frho(nlocal,pot) |
1246 |
endif |
1247 |
|
1248 |
|
1249 |
end subroutine do_preforce |
1250 |
|
1251 |
|
1252 |
subroutine get_interatomic_vector(q_i, q_j, d, r_sq) |
1253 |
|
1254 |
real (kind = dp), dimension(3) :: q_i |
1255 |
real (kind = dp), dimension(3) :: q_j |
1256 |
real ( kind = dp ), intent(out) :: r_sq |
1257 |
real( kind = dp ) :: d(3), scaled(3) |
1258 |
integer i |
1259 |
|
1260 |
d(1:3) = q_j(1:3) - q_i(1:3) |
1261 |
|
1262 |
! Wrap back into periodic box if necessary |
1263 |
if ( SIM_uses_PBC ) then |
1264 |
|
1265 |
if( .not.boxIsOrthorhombic ) then |
1266 |
! calc the scaled coordinates. |
1267 |
|
1268 |
scaled = matmul(HmatInv, d) |
1269 |
|
1270 |
! wrap the scaled coordinates |
1271 |
|
1272 |
scaled = scaled - anint(scaled) |
1273 |
|
1274 |
|
1275 |
! calc the wrapped real coordinates from the wrapped scaled |
1276 |
! coordinates |
1277 |
|
1278 |
d = matmul(Hmat,scaled) |
1279 |
|
1280 |
else |
1281 |
! calc the scaled coordinates. |
1282 |
|
1283 |
do i = 1, 3 |
1284 |
scaled(i) = d(i) * HmatInv(i,i) |
1285 |
|
1286 |
! wrap the scaled coordinates |
1287 |
|
1288 |
scaled(i) = scaled(i) - anint(scaled(i)) |
1289 |
|
1290 |
! calc the wrapped real coordinates from the wrapped scaled |
1291 |
! coordinates |
1292 |
|
1293 |
d(i) = scaled(i)*Hmat(i,i) |
1294 |
enddo |
1295 |
endif |
1296 |
|
1297 |
endif |
1298 |
|
1299 |
r_sq = dot_product(d,d) |
1300 |
|
1301 |
end subroutine get_interatomic_vector |
1302 |
|
1303 |
subroutine zero_work_arrays() |
1304 |
|
1305 |
#ifdef IS_MPI |
1306 |
|
1307 |
q_Row = 0.0_dp |
1308 |
q_Col = 0.0_dp |
1309 |
|
1310 |
q_group_Row = 0.0_dp |
1311 |
q_group_Col = 0.0_dp |
1312 |
|
1313 |
u_l_Row = 0.0_dp |
1314 |
u_l_Col = 0.0_dp |
1315 |
|
1316 |
A_Row = 0.0_dp |
1317 |
A_Col = 0.0_dp |
1318 |
|
1319 |
f_Row = 0.0_dp |
1320 |
f_Col = 0.0_dp |
1321 |
f_Temp = 0.0_dp |
1322 |
|
1323 |
t_Row = 0.0_dp |
1324 |
t_Col = 0.0_dp |
1325 |
t_Temp = 0.0_dp |
1326 |
|
1327 |
pot_Row = 0.0_dp |
1328 |
pot_Col = 0.0_dp |
1329 |
pot_Temp = 0.0_dp |
1330 |
|
1331 |
rf_Row = 0.0_dp |
1332 |
rf_Col = 0.0_dp |
1333 |
rf_Temp = 0.0_dp |
1334 |
|
1335 |
#endif |
1336 |
|
1337 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
1338 |
call clean_EAM() |
1339 |
endif |
1340 |
|
1341 |
rf = 0.0_dp |
1342 |
tau_Temp = 0.0_dp |
1343 |
virial_Temp = 0.0_dp |
1344 |
end subroutine zero_work_arrays |
1345 |
|
1346 |
function skipThisPair(atom1, atom2) result(skip_it) |
1347 |
integer, intent(in) :: atom1 |
1348 |
integer, intent(in), optional :: atom2 |
1349 |
logical :: skip_it |
1350 |
integer :: unique_id_1, unique_id_2 |
1351 |
integer :: me_i,me_j |
1352 |
integer :: i |
1353 |
|
1354 |
skip_it = .false. |
1355 |
|
1356 |
!! there are a number of reasons to skip a pair or a particle |
1357 |
!! mostly we do this to exclude atoms who are involved in short |
1358 |
!! range interactions (bonds, bends, torsions), but we also need |
1359 |
!! to exclude some overcounted interactions that result from |
1360 |
!! the parallel decomposition |
1361 |
|
1362 |
#ifdef IS_MPI |
1363 |
!! in MPI, we have to look up the unique IDs for each atom |
1364 |
unique_id_1 = tagRow(atom1) |
1365 |
#else |
1366 |
!! in the normal loop, the atom numbers are unique |
1367 |
unique_id_1 = atom1 |
1368 |
#endif |
1369 |
|
1370 |
!! We were called with only one atom, so just check the global exclude |
1371 |
!! list for this atom |
1372 |
if (.not. present(atom2)) then |
1373 |
do i = 1, nExcludes_global |
1374 |
if (excludesGlobal(i) == unique_id_1) then |
1375 |
skip_it = .true. |
1376 |
return |
1377 |
end if |
1378 |
end do |
1379 |
return |
1380 |
end if |
1381 |
|
1382 |
#ifdef IS_MPI |
1383 |
unique_id_2 = tagColumn(atom2) |
1384 |
#else |
1385 |
unique_id_2 = atom2 |
1386 |
#endif |
1387 |
|
1388 |
#ifdef IS_MPI |
1389 |
!! this situation should only arise in MPI simulations |
1390 |
if (unique_id_1 == unique_id_2) then |
1391 |
skip_it = .true. |
1392 |
return |
1393 |
end if |
1394 |
|
1395 |
!! this prevents us from doing the pair on multiple processors |
1396 |
if (unique_id_1 < unique_id_2) then |
1397 |
if (mod(unique_id_1 + unique_id_2,2) == 0) then |
1398 |
skip_it = .true. |
1399 |
return |
1400 |
endif |
1401 |
else |
1402 |
if (mod(unique_id_1 + unique_id_2,2) == 1) then |
1403 |
skip_it = .true. |
1404 |
return |
1405 |
endif |
1406 |
endif |
1407 |
#endif |
1408 |
|
1409 |
!! the rest of these situations can happen in all simulations: |
1410 |
do i = 1, nExcludes_global |
1411 |
if ((excludesGlobal(i) == unique_id_1) .or. & |
1412 |
(excludesGlobal(i) == unique_id_2)) then |
1413 |
skip_it = .true. |
1414 |
return |
1415 |
endif |
1416 |
enddo |
1417 |
|
1418 |
do i = 1, nExcludes_local |
1419 |
if (excludesLocal(1,i) == unique_id_1) then |
1420 |
if (excludesLocal(2,i) == unique_id_2) then |
1421 |
skip_it = .true. |
1422 |
return |
1423 |
endif |
1424 |
else |
1425 |
if (excludesLocal(1,i) == unique_id_2) then |
1426 |
if (excludesLocal(2,i) == unique_id_1) then |
1427 |
skip_it = .true. |
1428 |
return |
1429 |
endif |
1430 |
endif |
1431 |
endif |
1432 |
end do |
1433 |
|
1434 |
return |
1435 |
end function skipThisPair |
1436 |
|
1437 |
function FF_UsesDirectionalAtoms() result(doesit) |
1438 |
logical :: doesit |
1439 |
doesit = FF_uses_dipoles .or. FF_uses_sticky .or. & |
1440 |
FF_uses_GB .or. FF_uses_RF |
1441 |
end function FF_UsesDirectionalAtoms |
1442 |
|
1443 |
function FF_RequiresPrepairCalc() result(doesit) |
1444 |
logical :: doesit |
1445 |
doesit = FF_uses_EAM |
1446 |
end function FF_RequiresPrepairCalc |
1447 |
|
1448 |
function FF_RequiresPostpairCalc() result(doesit) |
1449 |
logical :: doesit |
1450 |
doesit = FF_uses_RF |
1451 |
end function FF_RequiresPostpairCalc |
1452 |
|
1453 |
#ifdef PROFILE |
1454 |
function getforcetime() result(totalforcetime) |
1455 |
real(kind=dp) :: totalforcetime |
1456 |
totalforcetime = forcetime |
1457 |
end function getforcetime |
1458 |
#endif |
1459 |
|
1460 |
!! This cleans componets of force arrays belonging only to fortran |
1461 |
|
1462 |
end module do_Forces |