| 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 1.1.1.1 2004-07-16 18:57:55 gezelter Exp $, $Date: 2004-07-16 18:57:55 $, $Name: not supported by cvs2svn $, $Revision: 1.1.1.1 $ |
| 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 |
INTEGER, PARAMETER:: PREPAIR_LOOP = 1 |
| 37 |
INTEGER, PARAMETER:: PAIR_LOOP = 2 |
| 38 |
|
| 39 |
logical, save :: haveRlist = .false. |
| 40 |
logical, save :: haveNeighborList = .false. |
| 41 |
logical, save :: havePolicies = .false. |
| 42 |
logical, save :: haveSIMvariables = .false. |
| 43 |
logical, save :: havePropertyMap = .false. |
| 44 |
logical, save :: haveSaneForceField = .false. |
| 45 |
logical, save :: FF_uses_LJ |
| 46 |
logical, save :: FF_uses_sticky |
| 47 |
logical, save :: FF_uses_charges |
| 48 |
logical, save :: FF_uses_dipoles |
| 49 |
logical, save :: FF_uses_RF |
| 50 |
logical, save :: FF_uses_GB |
| 51 |
logical, save :: FF_uses_EAM |
| 52 |
logical, save :: SIM_uses_LJ |
| 53 |
logical, save :: SIM_uses_sticky |
| 54 |
logical, save :: SIM_uses_charges |
| 55 |
logical, save :: SIM_uses_dipoles |
| 56 |
logical, save :: SIM_uses_RF |
| 57 |
logical, save :: SIM_uses_GB |
| 58 |
logical, save :: SIM_uses_EAM |
| 59 |
logical, save :: SIM_requires_postpair_calc |
| 60 |
logical, save :: SIM_requires_prepair_calc |
| 61 |
logical, save :: SIM_uses_directional_atoms |
| 62 |
logical, save :: SIM_uses_PBC |
| 63 |
logical, save :: SIM_uses_molecular_cutoffs |
| 64 |
|
| 65 |
real(kind=dp), save :: rlist, rlistsq |
| 66 |
|
| 67 |
public :: init_FF |
| 68 |
public :: do_force_loop |
| 69 |
public :: setRlistDF |
| 70 |
|
| 71 |
#ifdef PROFILE |
| 72 |
public :: getforcetime |
| 73 |
real, save :: forceTime = 0 |
| 74 |
real :: forceTimeInitial, forceTimeFinal |
| 75 |
integer :: nLoops |
| 76 |
#endif |
| 77 |
|
| 78 |
type :: Properties |
| 79 |
logical :: is_lj = .false. |
| 80 |
logical :: is_sticky = .false. |
| 81 |
logical :: is_dp = .false. |
| 82 |
logical :: is_gb = .false. |
| 83 |
logical :: is_eam = .false. |
| 84 |
logical :: is_charge = .false. |
| 85 |
real(kind=DP) :: charge = 0.0_DP |
| 86 |
real(kind=DP) :: dipole_moment = 0.0_DP |
| 87 |
end type Properties |
| 88 |
|
| 89 |
type(Properties), dimension(:),allocatable :: PropertyMap |
| 90 |
|
| 91 |
contains |
| 92 |
|
| 93 |
subroutine setRlistDF( this_rlist ) |
| 94 |
|
| 95 |
real(kind=dp) :: this_rlist |
| 96 |
|
| 97 |
rlist = this_rlist |
| 98 |
rlistsq = rlist * rlist |
| 99 |
|
| 100 |
haveRlist = .true. |
| 101 |
|
| 102 |
end subroutine setRlistDF |
| 103 |
|
| 104 |
subroutine createPropertyMap(status) |
| 105 |
integer :: nAtypes |
| 106 |
integer :: status |
| 107 |
integer :: i |
| 108 |
logical :: thisProperty |
| 109 |
real (kind=DP) :: thisDPproperty |
| 110 |
|
| 111 |
status = 0 |
| 112 |
|
| 113 |
nAtypes = getSize(atypes) |
| 114 |
|
| 115 |
if (nAtypes == 0) then |
| 116 |
status = -1 |
| 117 |
return |
| 118 |
end if |
| 119 |
|
| 120 |
if (.not. allocated(PropertyMap)) then |
| 121 |
allocate(PropertyMap(nAtypes)) |
| 122 |
endif |
| 123 |
|
| 124 |
do i = 1, nAtypes |
| 125 |
call getElementProperty(atypes, i, "is_LJ", thisProperty) |
| 126 |
PropertyMap(i)%is_LJ = thisProperty |
| 127 |
|
| 128 |
call getElementProperty(atypes, i, "is_Charge", thisProperty) |
| 129 |
PropertyMap(i)%is_Charge = thisProperty |
| 130 |
|
| 131 |
if (thisProperty) then |
| 132 |
call getElementProperty(atypes, i, "charge", thisDPproperty) |
| 133 |
PropertyMap(i)%charge = thisDPproperty |
| 134 |
endif |
| 135 |
|
| 136 |
call getElementProperty(atypes, i, "is_DP", thisProperty) |
| 137 |
PropertyMap(i)%is_DP = thisProperty |
| 138 |
|
| 139 |
if (thisProperty) then |
| 140 |
call getElementProperty(atypes, i, "dipole_moment", thisDPproperty) |
| 141 |
PropertyMap(i)%dipole_moment = thisDPproperty |
| 142 |
endif |
| 143 |
|
| 144 |
call getElementProperty(atypes, i, "is_Sticky", thisProperty) |
| 145 |
PropertyMap(i)%is_Sticky = thisProperty |
| 146 |
call getElementProperty(atypes, i, "is_GB", thisProperty) |
| 147 |
PropertyMap(i)%is_GB = thisProperty |
| 148 |
call getElementProperty(atypes, i, "is_EAM", thisProperty) |
| 149 |
PropertyMap(i)%is_EAM = thisProperty |
| 150 |
end do |
| 151 |
|
| 152 |
havePropertyMap = .true. |
| 153 |
|
| 154 |
end subroutine createPropertyMap |
| 155 |
|
| 156 |
subroutine setSimVariables() |
| 157 |
SIM_uses_LJ = SimUsesLJ() |
| 158 |
SIM_uses_sticky = SimUsesSticky() |
| 159 |
SIM_uses_charges = SimUsesCharges() |
| 160 |
SIM_uses_dipoles = SimUsesDipoles() |
| 161 |
SIM_uses_RF = SimUsesRF() |
| 162 |
SIM_uses_GB = SimUsesGB() |
| 163 |
SIM_uses_EAM = SimUsesEAM() |
| 164 |
SIM_requires_postpair_calc = SimRequiresPostpairCalc() |
| 165 |
SIM_requires_prepair_calc = SimRequiresPrepairCalc() |
| 166 |
SIM_uses_directional_atoms = SimUsesDirectionalAtoms() |
| 167 |
SIM_uses_PBC = SimUsesPBC() |
| 168 |
!SIM_uses_molecular_cutoffs = SimUsesMolecularCutoffs() |
| 169 |
|
| 170 |
haveSIMvariables = .true. |
| 171 |
|
| 172 |
return |
| 173 |
end subroutine setSimVariables |
| 174 |
|
| 175 |
subroutine doReadyCheck(error) |
| 176 |
integer, intent(out) :: error |
| 177 |
|
| 178 |
integer :: myStatus |
| 179 |
|
| 180 |
error = 0 |
| 181 |
|
| 182 |
if (.not. havePropertyMap) then |
| 183 |
|
| 184 |
myStatus = 0 |
| 185 |
|
| 186 |
call createPropertyMap(myStatus) |
| 187 |
|
| 188 |
if (myStatus .ne. 0) then |
| 189 |
write(default_error, *) 'createPropertyMap failed in do_Forces!' |
| 190 |
error = -1 |
| 191 |
return |
| 192 |
endif |
| 193 |
endif |
| 194 |
|
| 195 |
if (.not. haveSIMvariables) then |
| 196 |
call setSimVariables() |
| 197 |
endif |
| 198 |
|
| 199 |
if (.not. haveRlist) then |
| 200 |
write(default_error, *) 'rList has not been set in do_Forces!' |
| 201 |
error = -1 |
| 202 |
return |
| 203 |
endif |
| 204 |
|
| 205 |
if (SIM_uses_LJ .and. FF_uses_LJ) then |
| 206 |
if (.not. havePolicies) then |
| 207 |
write(default_error, *) 'LJ mixing Policies have not been set in do_Forces!' |
| 208 |
error = -1 |
| 209 |
return |
| 210 |
endif |
| 211 |
endif |
| 212 |
|
| 213 |
if (.not. haveNeighborList) then |
| 214 |
write(default_error, *) 'neighbor list has not been initialized in do_Forces!' |
| 215 |
error = -1 |
| 216 |
return |
| 217 |
end if |
| 218 |
|
| 219 |
if (.not. haveSaneForceField) then |
| 220 |
write(default_error, *) 'Force Field is not sane in do_Forces!' |
| 221 |
error = -1 |
| 222 |
return |
| 223 |
end if |
| 224 |
|
| 225 |
#ifdef IS_MPI |
| 226 |
if (.not. isMPISimSet()) then |
| 227 |
write(default_error,*) "ERROR: mpiSimulation has not been initialized!" |
| 228 |
error = -1 |
| 229 |
return |
| 230 |
endif |
| 231 |
#endif |
| 232 |
return |
| 233 |
end subroutine doReadyCheck |
| 234 |
|
| 235 |
|
| 236 |
subroutine init_FF(LJMIXPOLICY, use_RF_c, thisStat) |
| 237 |
|
| 238 |
integer, intent(in) :: LJMIXPOLICY |
| 239 |
logical, intent(in) :: use_RF_c |
| 240 |
|
| 241 |
integer, intent(out) :: thisStat |
| 242 |
integer :: my_status, nMatches |
| 243 |
integer, pointer :: MatchList(:) => null() |
| 244 |
real(kind=dp) :: rcut, rrf, rt, dielect |
| 245 |
|
| 246 |
!! assume things are copacetic, unless they aren't |
| 247 |
thisStat = 0 |
| 248 |
|
| 249 |
!! Fortran's version of a cast: |
| 250 |
FF_uses_RF = use_RF_c |
| 251 |
|
| 252 |
!! init_FF is called *after* all of the atom types have been |
| 253 |
!! defined in atype_module using the new_atype subroutine. |
| 254 |
!! |
| 255 |
!! this will scan through the known atypes and figure out what |
| 256 |
!! interactions are used by the force field. |
| 257 |
|
| 258 |
FF_uses_LJ = .false. |
| 259 |
FF_uses_sticky = .false. |
| 260 |
FF_uses_charges = .false. |
| 261 |
FF_uses_dipoles = .false. |
| 262 |
FF_uses_GB = .false. |
| 263 |
FF_uses_EAM = .false. |
| 264 |
|
| 265 |
call getMatchingElementList(atypes, "is_LJ", .true., nMatches, MatchList) |
| 266 |
if (nMatches .gt. 0) FF_uses_LJ = .true. |
| 267 |
|
| 268 |
call getMatchingElementList(atypes, "is_Charge", .true., nMatches, MatchList) |
| 269 |
if (nMatches .gt. 0) FF_uses_charges = .true. |
| 270 |
|
| 271 |
call getMatchingElementList(atypes, "is_DP", .true., nMatches, MatchList) |
| 272 |
if (nMatches .gt. 0) FF_uses_dipoles = .true. |
| 273 |
|
| 274 |
call getMatchingElementList(atypes, "is_Sticky", .true., nMatches, & |
| 275 |
MatchList) |
| 276 |
if (nMatches .gt. 0) FF_uses_Sticky = .true. |
| 277 |
|
| 278 |
call getMatchingElementList(atypes, "is_GB", .true., nMatches, MatchList) |
| 279 |
if (nMatches .gt. 0) FF_uses_GB = .true. |
| 280 |
|
| 281 |
call getMatchingElementList(atypes, "is_EAM", .true., nMatches, MatchList) |
| 282 |
if (nMatches .gt. 0) FF_uses_EAM = .true. |
| 283 |
|
| 284 |
!! Assume sanity (for the sake of argument) |
| 285 |
haveSaneForceField = .true. |
| 286 |
|
| 287 |
!! check to make sure the FF_uses_RF setting makes sense |
| 288 |
|
| 289 |
if (FF_uses_dipoles) then |
| 290 |
if (FF_uses_RF) then |
| 291 |
dielect = getDielect() |
| 292 |
call initialize_rf(dielect) |
| 293 |
endif |
| 294 |
else |
| 295 |
if (FF_uses_RF) then |
| 296 |
write(default_error,*) 'Using Reaction Field with no dipoles? Huh?' |
| 297 |
thisStat = -1 |
| 298 |
haveSaneForceField = .false. |
| 299 |
return |
| 300 |
endif |
| 301 |
endif |
| 302 |
|
| 303 |
if (FF_uses_LJ) then |
| 304 |
|
| 305 |
select case (LJMIXPOLICY) |
| 306 |
case (LB_MIXING_RULE) |
| 307 |
call init_lj_FF(LB_MIXING_RULE, my_status) |
| 308 |
case (EXPLICIT_MIXING_RULE) |
| 309 |
call init_lj_FF(EXPLICIT_MIXING_RULE, my_status) |
| 310 |
case default |
| 311 |
write(default_error,*) 'unknown LJ Mixing Policy!' |
| 312 |
thisStat = -1 |
| 313 |
haveSaneForceField = .false. |
| 314 |
return |
| 315 |
end select |
| 316 |
if (my_status /= 0) then |
| 317 |
thisStat = -1 |
| 318 |
haveSaneForceField = .false. |
| 319 |
return |
| 320 |
end if |
| 321 |
havePolicies = .true. |
| 322 |
endif |
| 323 |
|
| 324 |
if (FF_uses_sticky) then |
| 325 |
call check_sticky_FF(my_status) |
| 326 |
if (my_status /= 0) then |
| 327 |
thisStat = -1 |
| 328 |
haveSaneForceField = .false. |
| 329 |
return |
| 330 |
end if |
| 331 |
endif |
| 332 |
|
| 333 |
|
| 334 |
if (FF_uses_EAM) then |
| 335 |
call init_EAM_FF(my_status) |
| 336 |
if (my_status /= 0) then |
| 337 |
write(default_error, *) "init_EAM_FF returned a bad status" |
| 338 |
thisStat = -1 |
| 339 |
haveSaneForceField = .false. |
| 340 |
return |
| 341 |
end if |
| 342 |
endif |
| 343 |
|
| 344 |
if (FF_uses_GB) then |
| 345 |
call check_gb_pair_FF(my_status) |
| 346 |
if (my_status .ne. 0) then |
| 347 |
thisStat = -1 |
| 348 |
haveSaneForceField = .false. |
| 349 |
return |
| 350 |
endif |
| 351 |
endif |
| 352 |
|
| 353 |
if (FF_uses_GB .and. FF_uses_LJ) then |
| 354 |
endif |
| 355 |
if (.not. haveNeighborList) then |
| 356 |
!! Create neighbor lists |
| 357 |
call expandNeighborList(nLocal, my_status) |
| 358 |
if (my_Status /= 0) then |
| 359 |
write(default_error,*) "SimSetup: ExpandNeighborList returned error." |
| 360 |
thisStat = -1 |
| 361 |
return |
| 362 |
endif |
| 363 |
haveNeighborList = .true. |
| 364 |
endif |
| 365 |
|
| 366 |
|
| 367 |
|
| 368 |
end subroutine init_FF |
| 369 |
|
| 370 |
|
| 371 |
!! Does force loop over i,j pairs. Calls do_pair to calculates forces. |
| 372 |
!-------------------------------------------------------------> |
| 373 |
subroutine do_force_loop(q, q_group, A, u_l, f, t, tau, pot, & |
| 374 |
do_pot_c, do_stress_c, error) |
| 375 |
!! Position array provided by C, dimensioned by getNlocal |
| 376 |
real ( kind = dp ), dimension(3, nLocal) :: q |
| 377 |
!! molecular center-of-mass position array |
| 378 |
real ( kind = dp ), dimension(3, nGroups) :: q_group |
| 379 |
!! Rotation Matrix for each long range particle in simulation. |
| 380 |
real( kind = dp), dimension(9, nLocal) :: A |
| 381 |
!! Unit vectors for dipoles (lab frame) |
| 382 |
real( kind = dp ), dimension(3,nLocal) :: u_l |
| 383 |
!! Force array provided by C, dimensioned by getNlocal |
| 384 |
real ( kind = dp ), dimension(3,nLocal) :: f |
| 385 |
!! Torsion array provided by C, dimensioned by getNlocal |
| 386 |
real( kind = dp ), dimension(3,nLocal) :: t |
| 387 |
|
| 388 |
!! Stress Tensor |
| 389 |
real( kind = dp), dimension(9) :: tau |
| 390 |
real ( kind = dp ) :: pot |
| 391 |
logical ( kind = 2) :: do_pot_c, do_stress_c |
| 392 |
logical :: do_pot |
| 393 |
logical :: do_stress |
| 394 |
logical :: in_switching_region |
| 395 |
#ifdef IS_MPI |
| 396 |
real( kind = DP ) :: pot_local |
| 397 |
integer :: nAtomsInRow |
| 398 |
integer :: nAtomsInCol |
| 399 |
integer :: nprocs |
| 400 |
integer :: nGroupsInRow |
| 401 |
integer :: nGroupsInCol |
| 402 |
#endif |
| 403 |
integer :: natoms |
| 404 |
logical :: update_nlist |
| 405 |
integer :: i, j, jstart, jend, jnab |
| 406 |
integer :: istart, iend |
| 407 |
integer :: ia, jb, atom1, atom2 |
| 408 |
integer :: nlist |
| 409 |
real( kind = DP ) :: ratmsq, rgrpsq, rgrp, vpair, vij |
| 410 |
real( kind = DP ) :: sw, dswdr, swderiv, mf |
| 411 |
real(kind=dp),dimension(3) :: d_atm, d_grp, fpair, fij |
| 412 |
real(kind=dp) :: rfpot, mu_i, virial |
| 413 |
integer :: me_i, me_j, n_in_i, n_in_j |
| 414 |
logical :: is_dp_i |
| 415 |
integer :: neighborListSize |
| 416 |
integer :: listerror, error |
| 417 |
integer :: localError |
| 418 |
integer :: propPack_i, propPack_j |
| 419 |
integer :: loopStart, loopEnd, loop |
| 420 |
|
| 421 |
real(kind=dp) :: listSkin = 1.0 |
| 422 |
|
| 423 |
!! initialize local variables |
| 424 |
|
| 425 |
#ifdef IS_MPI |
| 426 |
pot_local = 0.0_dp |
| 427 |
nAtomsInRow = getNatomsInRow(plan_atom_row) |
| 428 |
nAtomsInCol = getNatomsInCol(plan_atom_col) |
| 429 |
nGroupsInRow = getNgroupsInRow(plan_group_row) |
| 430 |
nGroupsInCol = getNgroupsInCol(plan_group_col) |
| 431 |
#else |
| 432 |
natoms = nlocal |
| 433 |
#endif |
| 434 |
|
| 435 |
call doReadyCheck(localError) |
| 436 |
if ( localError .ne. 0 ) then |
| 437 |
call handleError("do_force_loop", "Not Initialized") |
| 438 |
error = -1 |
| 439 |
return |
| 440 |
end if |
| 441 |
call zero_work_arrays() |
| 442 |
|
| 443 |
do_pot = do_pot_c |
| 444 |
do_stress = do_stress_c |
| 445 |
|
| 446 |
! Gather all information needed by all force loops: |
| 447 |
|
| 448 |
#ifdef IS_MPI |
| 449 |
|
| 450 |
call gather(q, q_Row, plan_atom_row_3d) |
| 451 |
call gather(q, q_Col, plan_atom_col_3d) |
| 452 |
|
| 453 |
call gather(q_group, q_group_Row, plan_group_row_3d) |
| 454 |
call gather(q_group, q_group_Col, plan_group_col_3d) |
| 455 |
|
| 456 |
if (FF_UsesDirectionalAtoms() .and. SIM_uses_directional_atoms) then |
| 457 |
call gather(u_l, u_l_Row, plan_atom_row_3d) |
| 458 |
call gather(u_l, u_l_Col, plan_atom_col_3d) |
| 459 |
|
| 460 |
call gather(A, A_Row, plan_atom_row_rotation) |
| 461 |
call gather(A, A_Col, plan_atom_col_rotation) |
| 462 |
endif |
| 463 |
|
| 464 |
#endif |
| 465 |
|
| 466 |
!! Begin force loop timing: |
| 467 |
#ifdef PROFILE |
| 468 |
call cpu_time(forceTimeInitial) |
| 469 |
nloops = nloops + 1 |
| 470 |
#endif |
| 471 |
|
| 472 |
loopEnd = PAIR_LOOP |
| 473 |
if (FF_RequiresPrepairCalc() .and. SIM_requires_prepair_calc) then |
| 474 |
loopStart = PREPAIR_LOOP |
| 475 |
else |
| 476 |
loopStart = PAIR_LOOP |
| 477 |
endif |
| 478 |
|
| 479 |
do loop = loopStart, loopEnd |
| 480 |
|
| 481 |
! See if we need to update neighbor lists |
| 482 |
! (but only on the first time through): |
| 483 |
if (loop .eq. loopStart) then |
| 484 |
#ifdef IS_MPI |
| 485 |
call checkNeighborList(nGroupsInRow, q_group_row, listSkin, & |
| 486 |
update_nlist) |
| 487 |
#else |
| 488 |
call checkNeighborList(nGroups, q_group, listSkin, & |
| 489 |
update_nlist) |
| 490 |
#endif |
| 491 |
endif |
| 492 |
|
| 493 |
if (update_nlist) then |
| 494 |
!! save current configuration and construct neighbor list |
| 495 |
#ifdef IS_MPI |
| 496 |
call saveNeighborList(nGroupsInRow, q_group_row) |
| 497 |
#else |
| 498 |
call saveNeighborList(nGroups, q_group) |
| 499 |
#endif |
| 500 |
neighborListSize = size(list) |
| 501 |
nlist = 0 |
| 502 |
endif |
| 503 |
|
| 504 |
istart = 1 |
| 505 |
#ifdef IS_MPI |
| 506 |
iend = nGroupsInRow |
| 507 |
#else |
| 508 |
iend = nGroups - 1 |
| 509 |
#endif |
| 510 |
outer: do i = istart, iend |
| 511 |
|
| 512 |
if (update_nlist) point(i) = nlist + 1 |
| 513 |
|
| 514 |
n_in_i = groupStartRow(i+1) - groupStartRow(i) |
| 515 |
|
| 516 |
if (update_nlist) then |
| 517 |
#ifdef IS_MPI |
| 518 |
jstart = 1 |
| 519 |
jend = nGroupsInCol |
| 520 |
#else |
| 521 |
jstart = i+1 |
| 522 |
jend = nGroups |
| 523 |
#endif |
| 524 |
else |
| 525 |
jstart = point(i) |
| 526 |
jend = point(i+1) - 1 |
| 527 |
! make sure group i has neighbors |
| 528 |
if (jstart .gt. jend) cycle outer |
| 529 |
endif |
| 530 |
|
| 531 |
do jnab = jstart, jend |
| 532 |
if (update_nlist) then |
| 533 |
j = jnab |
| 534 |
else |
| 535 |
j = list(jnab) |
| 536 |
endif |
| 537 |
|
| 538 |
#ifdef IS_MPI |
| 539 |
call get_interatomic_vector(q_group_Row(:,i), & |
| 540 |
q_group_Col(:,j), d_grp, rgrpsq) |
| 541 |
#else |
| 542 |
call get_interatomic_vector(q_group(:,i), & |
| 543 |
q_group(:,j), d_grp, rgrpsq) |
| 544 |
#endif |
| 545 |
|
| 546 |
if (rgrpsq < rlistsq) then |
| 547 |
if (update_nlist) then |
| 548 |
nlist = nlist + 1 |
| 549 |
|
| 550 |
if (nlist > neighborListSize) then |
| 551 |
#ifdef IS_MPI |
| 552 |
call expandNeighborList(nGroupsInRow, listerror) |
| 553 |
#else |
| 554 |
call expandNeighborList(nGroups, listerror) |
| 555 |
#endif |
| 556 |
if (listerror /= 0) then |
| 557 |
error = -1 |
| 558 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
| 559 |
return |
| 560 |
end if |
| 561 |
neighborListSize = size(list) |
| 562 |
endif |
| 563 |
|
| 564 |
list(nlist) = j |
| 565 |
endif |
| 566 |
|
| 567 |
if (loop .eq. PAIR_LOOP) then |
| 568 |
vij = 0.0d0 |
| 569 |
fij(1:3) = 0.0d0 |
| 570 |
endif |
| 571 |
|
| 572 |
call get_switch(rgrpsq, sw, dswdr, rgrp, group_switch, & |
| 573 |
in_switching_region) |
| 574 |
|
| 575 |
n_in_j = groupStartCol(j+1) - groupStartCol(j) |
| 576 |
|
| 577 |
do ia = groupStartRow(i), groupStartRow(i+1)-1 |
| 578 |
|
| 579 |
atom1 = groupListRow(ia) |
| 580 |
|
| 581 |
inner: do jb = groupStartCol(j), groupStartCol(j+1)-1 |
| 582 |
|
| 583 |
atom2 = groupListCol(jb) |
| 584 |
|
| 585 |
if (skipThisPair(atom1, atom2)) cycle inner |
| 586 |
|
| 587 |
if ((n_in_i .eq. 1).and.(n_in_j .eq. 1)) then |
| 588 |
d_atm(1:3) = d_grp(1:3) |
| 589 |
ratmsq = rgrpsq |
| 590 |
else |
| 591 |
#ifdef IS_MPI |
| 592 |
call get_interatomic_vector(q_Row(:,atom1), & |
| 593 |
q_Col(:,atom2), d_atm, ratmsq) |
| 594 |
#else |
| 595 |
call get_interatomic_vector(q(:,atom1), & |
| 596 |
q(:,atom2), d_atm, ratmsq) |
| 597 |
#endif |
| 598 |
endif |
| 599 |
|
| 600 |
if (loop .eq. PREPAIR_LOOP) then |
| 601 |
#ifdef IS_MPI |
| 602 |
call do_prepair(atom1, atom2, ratmsq, d_atm, sw, & |
| 603 |
rgrpsq, d_grp, do_pot, do_stress, & |
| 604 |
u_l, A, f, t, pot_local) |
| 605 |
#else |
| 606 |
call do_prepair(atom1, atom2, ratmsq, d_atm, sw, & |
| 607 |
rgrpsq, d_grp, do_pot, do_stress, & |
| 608 |
u_l, A, f, t, pot) |
| 609 |
#endif |
| 610 |
else |
| 611 |
#ifdef IS_MPI |
| 612 |
call do_pair(atom1, atom2, ratmsq, d_atm, sw, & |
| 613 |
do_pot, & |
| 614 |
u_l, A, f, t, pot_local, vpair, fpair) |
| 615 |
#else |
| 616 |
call do_pair(atom1, atom2, ratmsq, d_atm, sw, & |
| 617 |
do_pot, & |
| 618 |
u_l, A, f, t, pot, vpair, fpair) |
| 619 |
#endif |
| 620 |
|
| 621 |
vij = vij + vpair |
| 622 |
fij(1:3) = fij(1:3) + fpair(1:3) |
| 623 |
endif |
| 624 |
enddo inner |
| 625 |
enddo |
| 626 |
|
| 627 |
if (loop .eq. PAIR_LOOP) then |
| 628 |
if (in_switching_region) then |
| 629 |
swderiv = vij*dswdr/rgrp |
| 630 |
fij(1) = fij(1) + swderiv*d_grp(1) |
| 631 |
fij(2) = fij(2) + swderiv*d_grp(2) |
| 632 |
fij(3) = fij(3) + swderiv*d_grp(3) |
| 633 |
|
| 634 |
do ia=groupStartRow(i), groupStartRow(i+1)-1 |
| 635 |
atom1=groupListRow(ia) |
| 636 |
mf = mfactRow(atom1) |
| 637 |
#ifdef IS_MPI |
| 638 |
f_Row(1,atom1) = f_Row(1,atom1) + swderiv*d_grp(1)*mf |
| 639 |
f_Row(2,atom1) = f_Row(2,atom1) + swderiv*d_grp(2)*mf |
| 640 |
f_Row(3,atom1) = f_Row(3,atom1) + swderiv*d_grp(3)*mf |
| 641 |
#else |
| 642 |
f(1,atom1) = f(1,atom1) + swderiv*d_grp(1)*mf |
| 643 |
f(2,atom1) = f(2,atom1) + swderiv*d_grp(2)*mf |
| 644 |
f(3,atom1) = f(3,atom1) + swderiv*d_grp(3)*mf |
| 645 |
#endif |
| 646 |
enddo |
| 647 |
|
| 648 |
do jb=groupStartCol(j), groupStartCol(j+1)-1 |
| 649 |
atom2=groupListCol(jb) |
| 650 |
mf = mfactCol(atom2) |
| 651 |
#ifdef IS_MPI |
| 652 |
f_Col(1,atom2) = f_Col(1,atom2) - swderiv*d_grp(1)*mf |
| 653 |
f_Col(2,atom2) = f_Col(2,atom2) - swderiv*d_grp(2)*mf |
| 654 |
f_Col(3,atom2) = f_Col(3,atom2) - swderiv*d_grp(3)*mf |
| 655 |
#else |
| 656 |
f(1,atom2) = f(1,atom2) - swderiv*d_grp(1)*mf |
| 657 |
f(2,atom2) = f(2,atom2) - swderiv*d_grp(2)*mf |
| 658 |
f(3,atom2) = f(3,atom2) - swderiv*d_grp(3)*mf |
| 659 |
#endif |
| 660 |
enddo |
| 661 |
endif |
| 662 |
|
| 663 |
if (do_stress) call add_stress_tensor(d_grp, fij) |
| 664 |
endif |
| 665 |
end if |
| 666 |
enddo |
| 667 |
enddo outer |
| 668 |
|
| 669 |
if (update_nlist) then |
| 670 |
#ifdef IS_MPI |
| 671 |
point(nGroupsInRow + 1) = nlist + 1 |
| 672 |
#else |
| 673 |
point(nGroups) = nlist + 1 |
| 674 |
#endif |
| 675 |
if (loop .eq. PREPAIR_LOOP) then |
| 676 |
! we just did the neighbor list update on the first |
| 677 |
! pass, so we don't need to do it |
| 678 |
! again on the second pass |
| 679 |
update_nlist = .false. |
| 680 |
endif |
| 681 |
endif |
| 682 |
|
| 683 |
if (loop .eq. PREPAIR_LOOP) then |
| 684 |
call do_preforce(nlocal, pot) |
| 685 |
endif |
| 686 |
|
| 687 |
enddo |
| 688 |
|
| 689 |
!! Do timing |
| 690 |
#ifdef PROFILE |
| 691 |
call cpu_time(forceTimeFinal) |
| 692 |
forceTime = forceTime + forceTimeFinal - forceTimeInitial |
| 693 |
#endif |
| 694 |
|
| 695 |
#ifdef IS_MPI |
| 696 |
!!distribute forces |
| 697 |
|
| 698 |
f_temp = 0.0_dp |
| 699 |
call scatter(f_Row,f_temp,plan_atom_row_3d) |
| 700 |
do i = 1,nlocal |
| 701 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
| 702 |
end do |
| 703 |
|
| 704 |
f_temp = 0.0_dp |
| 705 |
call scatter(f_Col,f_temp,plan_atom_col_3d) |
| 706 |
do i = 1,nlocal |
| 707 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
| 708 |
end do |
| 709 |
|
| 710 |
if (FF_UsesDirectionalAtoms() .and. SIM_uses_directional_atoms) then |
| 711 |
t_temp = 0.0_dp |
| 712 |
call scatter(t_Row,t_temp,plan_atom_row_3d) |
| 713 |
do i = 1,nlocal |
| 714 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
| 715 |
end do |
| 716 |
t_temp = 0.0_dp |
| 717 |
call scatter(t_Col,t_temp,plan_atom_col_3d) |
| 718 |
|
| 719 |
do i = 1,nlocal |
| 720 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
| 721 |
end do |
| 722 |
endif |
| 723 |
|
| 724 |
if (do_pot) then |
| 725 |
! scatter/gather pot_row into the members of my column |
| 726 |
call scatter(pot_Row, pot_Temp, plan_atom_row) |
| 727 |
|
| 728 |
! scatter/gather pot_local into all other procs |
| 729 |
! add resultant to get total pot |
| 730 |
do i = 1, nlocal |
| 731 |
pot_local = pot_local + pot_Temp(i) |
| 732 |
enddo |
| 733 |
|
| 734 |
pot_Temp = 0.0_DP |
| 735 |
|
| 736 |
call scatter(pot_Col, pot_Temp, plan_atom_col) |
| 737 |
do i = 1, nlocal |
| 738 |
pot_local = pot_local + pot_Temp(i) |
| 739 |
enddo |
| 740 |
|
| 741 |
endif |
| 742 |
#endif |
| 743 |
|
| 744 |
if (FF_RequiresPostpairCalc() .and. SIM_requires_postpair_calc) then |
| 745 |
|
| 746 |
if (FF_uses_RF .and. SIM_uses_RF) then |
| 747 |
|
| 748 |
#ifdef IS_MPI |
| 749 |
call scatter(rf_Row,rf,plan_atom_row_3d) |
| 750 |
call scatter(rf_Col,rf_Temp,plan_atom_col_3d) |
| 751 |
do i = 1,nlocal |
| 752 |
rf(1:3,i) = rf(1:3,i) + rf_Temp(1:3,i) |
| 753 |
end do |
| 754 |
#endif |
| 755 |
|
| 756 |
do i = 1, nLocal |
| 757 |
|
| 758 |
rfpot = 0.0_DP |
| 759 |
#ifdef IS_MPI |
| 760 |
me_i = atid_row(i) |
| 761 |
#else |
| 762 |
me_i = atid(i) |
| 763 |
#endif |
| 764 |
|
| 765 |
if (PropertyMap(me_i)%is_DP) then |
| 766 |
|
| 767 |
mu_i = PropertyMap(me_i)%dipole_moment |
| 768 |
|
| 769 |
!! The reaction field needs to include a self contribution |
| 770 |
!! to the field: |
| 771 |
call accumulate_self_rf(i, mu_i, u_l) |
| 772 |
!! Get the reaction field contribution to the |
| 773 |
!! potential and torques: |
| 774 |
call reaction_field_final(i, mu_i, u_l, rfpot, t, do_pot) |
| 775 |
#ifdef IS_MPI |
| 776 |
pot_local = pot_local + rfpot |
| 777 |
#else |
| 778 |
pot = pot + rfpot |
| 779 |
|
| 780 |
#endif |
| 781 |
endif |
| 782 |
enddo |
| 783 |
endif |
| 784 |
endif |
| 785 |
|
| 786 |
|
| 787 |
#ifdef IS_MPI |
| 788 |
|
| 789 |
if (do_pot) then |
| 790 |
pot = pot + pot_local |
| 791 |
!! we assume the c code will do the allreduce to get the total potential |
| 792 |
!! we could do it right here if we needed to... |
| 793 |
endif |
| 794 |
|
| 795 |
if (do_stress) then |
| 796 |
call mpi_allreduce(tau_Temp, tau, 9,mpi_double_precision,mpi_sum, & |
| 797 |
mpi_comm_world,mpi_err) |
| 798 |
call mpi_allreduce(virial_Temp, virial,1,mpi_double_precision,mpi_sum, & |
| 799 |
mpi_comm_world,mpi_err) |
| 800 |
endif |
| 801 |
|
| 802 |
#else |
| 803 |
|
| 804 |
if (do_stress) then |
| 805 |
tau = tau_Temp |
| 806 |
virial = virial_Temp |
| 807 |
endif |
| 808 |
|
| 809 |
#endif |
| 810 |
|
| 811 |
end subroutine do_force_loop |
| 812 |
|
| 813 |
subroutine do_pair(i, j, rijsq, d, sw, do_pot, & |
| 814 |
u_l, A, f, t, pot, vpair, fpair) |
| 815 |
|
| 816 |
real( kind = dp ) :: pot, vpair, sw |
| 817 |
real( kind = dp ), dimension(3) :: fpair |
| 818 |
real( kind = dp ), dimension(nLocal) :: mfact |
| 819 |
real( kind = dp ), dimension(3,nLocal) :: u_l |
| 820 |
real( kind = dp ), dimension(9,nLocal) :: A |
| 821 |
real( kind = dp ), dimension(3,nLocal) :: f |
| 822 |
real( kind = dp ), dimension(3,nLocal) :: t |
| 823 |
|
| 824 |
logical, intent(inout) :: do_pot |
| 825 |
integer, intent(in) :: i, j |
| 826 |
real ( kind = dp ), intent(inout) :: rijsq |
| 827 |
real ( kind = dp ) :: r |
| 828 |
real ( kind = dp ), intent(inout) :: d(3) |
| 829 |
integer :: me_i, me_j |
| 830 |
|
| 831 |
r = sqrt(rijsq) |
| 832 |
vpair = 0.0d0 |
| 833 |
fpair(1:3) = 0.0d0 |
| 834 |
|
| 835 |
#ifdef IS_MPI |
| 836 |
me_i = atid_row(i) |
| 837 |
me_j = atid_col(j) |
| 838 |
#else |
| 839 |
me_i = atid(i) |
| 840 |
me_j = atid(j) |
| 841 |
#endif |
| 842 |
|
| 843 |
if (FF_uses_LJ .and. SIM_uses_LJ) then |
| 844 |
|
| 845 |
if ( PropertyMap(me_i)%is_LJ .and. PropertyMap(me_j)%is_LJ ) then |
| 846 |
call do_lj_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, f, do_pot) |
| 847 |
endif |
| 848 |
|
| 849 |
endif |
| 850 |
|
| 851 |
if (FF_uses_charges .and. SIM_uses_charges) then |
| 852 |
|
| 853 |
if (PropertyMap(me_i)%is_Charge .and. PropertyMap(me_j)%is_Charge) then |
| 854 |
call do_charge_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, f, do_pot) |
| 855 |
endif |
| 856 |
|
| 857 |
endif |
| 858 |
|
| 859 |
if (FF_uses_dipoles .and. SIM_uses_dipoles) then |
| 860 |
|
| 861 |
if ( PropertyMap(me_i)%is_DP .and. PropertyMap(me_j)%is_DP) then |
| 862 |
call do_dipole_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, u_l, f, t, & |
| 863 |
do_pot) |
| 864 |
if (FF_uses_RF .and. SIM_uses_RF) then |
| 865 |
call accumulate_rf(i, j, r, u_l, sw) |
| 866 |
call rf_correct_forces(i, j, d, r, u_l, sw, f, fpair) |
| 867 |
endif |
| 868 |
endif |
| 869 |
|
| 870 |
endif |
| 871 |
|
| 872 |
if (FF_uses_Sticky .and. SIM_uses_sticky) then |
| 873 |
|
| 874 |
if ( PropertyMap(me_i)%is_Sticky .and. PropertyMap(me_j)%is_Sticky) then |
| 875 |
call do_sticky_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, A, f, t, & |
| 876 |
do_pot) |
| 877 |
endif |
| 878 |
|
| 879 |
endif |
| 880 |
|
| 881 |
|
| 882 |
if (FF_uses_GB .and. SIM_uses_GB) then |
| 883 |
|
| 884 |
if ( PropertyMap(me_i)%is_GB .and. PropertyMap(me_j)%is_GB) then |
| 885 |
call do_gb_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, u_l, f, t, & |
| 886 |
do_pot) |
| 887 |
endif |
| 888 |
|
| 889 |
endif |
| 890 |
|
| 891 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
| 892 |
|
| 893 |
if ( PropertyMap(me_i)%is_EAM .and. PropertyMap(me_j)%is_EAM) then |
| 894 |
call do_eam_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, f, & |
| 895 |
do_pot) |
| 896 |
endif |
| 897 |
|
| 898 |
endif |
| 899 |
|
| 900 |
end subroutine do_pair |
| 901 |
|
| 902 |
subroutine do_prepair(i, j, rijsq, d, sw, rcijsq, dc, & |
| 903 |
do_pot, do_stress, u_l, A, f, t, pot) |
| 904 |
|
| 905 |
real( kind = dp ) :: pot, sw |
| 906 |
real( kind = dp ), dimension(3,nLocal) :: u_l |
| 907 |
real (kind=dp), dimension(9,nLocal) :: A |
| 908 |
real (kind=dp), dimension(3,nLocal) :: f |
| 909 |
real (kind=dp), dimension(3,nLocal) :: t |
| 910 |
|
| 911 |
logical, intent(inout) :: do_pot, do_stress |
| 912 |
integer, intent(in) :: i, j |
| 913 |
real ( kind = dp ), intent(inout) :: rijsq, rcijsq |
| 914 |
real ( kind = dp ) :: r, rc |
| 915 |
real ( kind = dp ), intent(inout) :: d(3), dc(3) |
| 916 |
|
| 917 |
logical :: is_EAM_i, is_EAM_j |
| 918 |
|
| 919 |
integer :: me_i, me_j |
| 920 |
|
| 921 |
|
| 922 |
r = sqrt(rijsq) |
| 923 |
if (SIM_uses_molecular_cutoffs) then |
| 924 |
rc = sqrt(rcijsq) |
| 925 |
else |
| 926 |
rc = r |
| 927 |
endif |
| 928 |
|
| 929 |
|
| 930 |
#ifdef IS_MPI |
| 931 |
me_i = atid_row(i) |
| 932 |
me_j = atid_col(j) |
| 933 |
#else |
| 934 |
me_i = atid(i) |
| 935 |
me_j = atid(j) |
| 936 |
#endif |
| 937 |
|
| 938 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
| 939 |
|
| 940 |
if (PropertyMap(me_i)%is_EAM .and. PropertyMap(me_j)%is_EAM) & |
| 941 |
call calc_EAM_prepair_rho(i, j, d, r, rijsq ) |
| 942 |
|
| 943 |
endif |
| 944 |
|
| 945 |
end subroutine do_prepair |
| 946 |
|
| 947 |
|
| 948 |
subroutine do_preforce(nlocal,pot) |
| 949 |
integer :: nlocal |
| 950 |
real( kind = dp ) :: pot |
| 951 |
|
| 952 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
| 953 |
call calc_EAM_preforce_Frho(nlocal,pot) |
| 954 |
endif |
| 955 |
|
| 956 |
|
| 957 |
end subroutine do_preforce |
| 958 |
|
| 959 |
|
| 960 |
subroutine get_interatomic_vector(q_i, q_j, d, r_sq) |
| 961 |
|
| 962 |
real (kind = dp), dimension(3) :: q_i |
| 963 |
real (kind = dp), dimension(3) :: q_j |
| 964 |
real ( kind = dp ), intent(out) :: r_sq |
| 965 |
real( kind = dp ) :: d(3), scaled(3) |
| 966 |
integer i |
| 967 |
|
| 968 |
d(1:3) = q_j(1:3) - q_i(1:3) |
| 969 |
|
| 970 |
! Wrap back into periodic box if necessary |
| 971 |
if ( SIM_uses_PBC ) then |
| 972 |
|
| 973 |
if( .not.boxIsOrthorhombic ) then |
| 974 |
! calc the scaled coordinates. |
| 975 |
|
| 976 |
scaled = matmul(HmatInv, d) |
| 977 |
|
| 978 |
! wrap the scaled coordinates |
| 979 |
|
| 980 |
scaled = scaled - anint(scaled) |
| 981 |
|
| 982 |
|
| 983 |
! calc the wrapped real coordinates from the wrapped scaled |
| 984 |
! coordinates |
| 985 |
|
| 986 |
d = matmul(Hmat,scaled) |
| 987 |
|
| 988 |
else |
| 989 |
! calc the scaled coordinates. |
| 990 |
|
| 991 |
do i = 1, 3 |
| 992 |
scaled(i) = d(i) * HmatInv(i,i) |
| 993 |
|
| 994 |
! wrap the scaled coordinates |
| 995 |
|
| 996 |
scaled(i) = scaled(i) - anint(scaled(i)) |
| 997 |
|
| 998 |
! calc the wrapped real coordinates from the wrapped scaled |
| 999 |
! coordinates |
| 1000 |
|
| 1001 |
d(i) = scaled(i)*Hmat(i,i) |
| 1002 |
enddo |
| 1003 |
endif |
| 1004 |
|
| 1005 |
endif |
| 1006 |
|
| 1007 |
r_sq = dot_product(d,d) |
| 1008 |
|
| 1009 |
end subroutine get_interatomic_vector |
| 1010 |
|
| 1011 |
subroutine zero_work_arrays() |
| 1012 |
|
| 1013 |
#ifdef IS_MPI |
| 1014 |
|
| 1015 |
q_Row = 0.0_dp |
| 1016 |
q_Col = 0.0_dp |
| 1017 |
|
| 1018 |
q_group_Row = 0.0_dp |
| 1019 |
q_group_Col = 0.0_dp |
| 1020 |
|
| 1021 |
u_l_Row = 0.0_dp |
| 1022 |
u_l_Col = 0.0_dp |
| 1023 |
|
| 1024 |
A_Row = 0.0_dp |
| 1025 |
A_Col = 0.0_dp |
| 1026 |
|
| 1027 |
f_Row = 0.0_dp |
| 1028 |
f_Col = 0.0_dp |
| 1029 |
f_Temp = 0.0_dp |
| 1030 |
|
| 1031 |
t_Row = 0.0_dp |
| 1032 |
t_Col = 0.0_dp |
| 1033 |
t_Temp = 0.0_dp |
| 1034 |
|
| 1035 |
pot_Row = 0.0_dp |
| 1036 |
pot_Col = 0.0_dp |
| 1037 |
pot_Temp = 0.0_dp |
| 1038 |
|
| 1039 |
rf_Row = 0.0_dp |
| 1040 |
rf_Col = 0.0_dp |
| 1041 |
rf_Temp = 0.0_dp |
| 1042 |
|
| 1043 |
#endif |
| 1044 |
|
| 1045 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
| 1046 |
call clean_EAM() |
| 1047 |
endif |
| 1048 |
|
| 1049 |
rf = 0.0_dp |
| 1050 |
tau_Temp = 0.0_dp |
| 1051 |
virial_Temp = 0.0_dp |
| 1052 |
end subroutine zero_work_arrays |
| 1053 |
|
| 1054 |
function skipThisPair(atom1, atom2) result(skip_it) |
| 1055 |
integer, intent(in) :: atom1 |
| 1056 |
integer, intent(in), optional :: atom2 |
| 1057 |
logical :: skip_it |
| 1058 |
integer :: unique_id_1, unique_id_2 |
| 1059 |
integer :: me_i,me_j |
| 1060 |
integer :: i |
| 1061 |
|
| 1062 |
skip_it = .false. |
| 1063 |
|
| 1064 |
!! there are a number of reasons to skip a pair or a particle |
| 1065 |
!! mostly we do this to exclude atoms who are involved in short |
| 1066 |
!! range interactions (bonds, bends, torsions), but we also need |
| 1067 |
!! to exclude some overcounted interactions that result from |
| 1068 |
!! the parallel decomposition |
| 1069 |
|
| 1070 |
#ifdef IS_MPI |
| 1071 |
!! in MPI, we have to look up the unique IDs for each atom |
| 1072 |
unique_id_1 = AtomRowToGlobal(atom1) |
| 1073 |
#else |
| 1074 |
!! in the normal loop, the atom numbers are unique |
| 1075 |
unique_id_1 = atom1 |
| 1076 |
#endif |
| 1077 |
|
| 1078 |
!! We were called with only one atom, so just check the global exclude |
| 1079 |
!! list for this atom |
| 1080 |
if (.not. present(atom2)) then |
| 1081 |
do i = 1, nExcludes_global |
| 1082 |
if (excludesGlobal(i) == unique_id_1) then |
| 1083 |
skip_it = .true. |
| 1084 |
return |
| 1085 |
end if |
| 1086 |
end do |
| 1087 |
return |
| 1088 |
end if |
| 1089 |
|
| 1090 |
#ifdef IS_MPI |
| 1091 |
unique_id_2 = AtomColToGlobal(atom2) |
| 1092 |
#else |
| 1093 |
unique_id_2 = atom2 |
| 1094 |
#endif |
| 1095 |
|
| 1096 |
#ifdef IS_MPI |
| 1097 |
!! this situation should only arise in MPI simulations |
| 1098 |
if (unique_id_1 == unique_id_2) then |
| 1099 |
skip_it = .true. |
| 1100 |
return |
| 1101 |
end if |
| 1102 |
|
| 1103 |
!! this prevents us from doing the pair on multiple processors |
| 1104 |
if (unique_id_1 < unique_id_2) then |
| 1105 |
if (mod(unique_id_1 + unique_id_2,2) == 0) then |
| 1106 |
skip_it = .true. |
| 1107 |
return |
| 1108 |
endif |
| 1109 |
else |
| 1110 |
if (mod(unique_id_1 + unique_id_2,2) == 1) then |
| 1111 |
skip_it = .true. |
| 1112 |
return |
| 1113 |
endif |
| 1114 |
endif |
| 1115 |
#endif |
| 1116 |
|
| 1117 |
!! the rest of these situations can happen in all simulations: |
| 1118 |
do i = 1, nExcludes_global |
| 1119 |
if ((excludesGlobal(i) == unique_id_1) .or. & |
| 1120 |
(excludesGlobal(i) == unique_id_2)) then |
| 1121 |
skip_it = .true. |
| 1122 |
return |
| 1123 |
endif |
| 1124 |
enddo |
| 1125 |
|
| 1126 |
do i = 1, nSkipsForAtom(atom1) |
| 1127 |
if (skipsForAtom(atom1, i) .eq. unique_id_2) then |
| 1128 |
skip_it = .true. |
| 1129 |
return |
| 1130 |
endif |
| 1131 |
end do |
| 1132 |
|
| 1133 |
return |
| 1134 |
end function skipThisPair |
| 1135 |
|
| 1136 |
function FF_UsesDirectionalAtoms() result(doesit) |
| 1137 |
logical :: doesit |
| 1138 |
doesit = FF_uses_dipoles .or. FF_uses_sticky .or. & |
| 1139 |
FF_uses_GB .or. FF_uses_RF |
| 1140 |
end function FF_UsesDirectionalAtoms |
| 1141 |
|
| 1142 |
function FF_RequiresPrepairCalc() result(doesit) |
| 1143 |
logical :: doesit |
| 1144 |
doesit = FF_uses_EAM |
| 1145 |
end function FF_RequiresPrepairCalc |
| 1146 |
|
| 1147 |
function FF_RequiresPostpairCalc() result(doesit) |
| 1148 |
logical :: doesit |
| 1149 |
doesit = FF_uses_RF |
| 1150 |
end function FF_RequiresPostpairCalc |
| 1151 |
|
| 1152 |
#ifdef PROFILE |
| 1153 |
function getforcetime() result(totalforcetime) |
| 1154 |
real(kind=dp) :: totalforcetime |
| 1155 |
totalforcetime = forcetime |
| 1156 |
end function getforcetime |
| 1157 |
#endif |
| 1158 |
|
| 1159 |
!! This cleans componets of force arrays belonging only to fortran |
| 1160 |
|
| 1161 |
subroutine add_stress_tensor(dpair, fpair) |
| 1162 |
|
| 1163 |
real( kind = dp ), dimension(3), intent(in) :: dpair, fpair |
| 1164 |
|
| 1165 |
! because the d vector is the rj - ri vector, and |
| 1166 |
! because fx, fy, fz are the force on atom i, we need a |
| 1167 |
! negative sign here: |
| 1168 |
|
| 1169 |
tau_Temp(1) = tau_Temp(1) - dpair(1) * fpair(1) |
| 1170 |
tau_Temp(2) = tau_Temp(2) - dpair(1) * fpair(2) |
| 1171 |
tau_Temp(3) = tau_Temp(3) - dpair(1) * fpair(3) |
| 1172 |
tau_Temp(4) = tau_Temp(4) - dpair(2) * fpair(1) |
| 1173 |
tau_Temp(5) = tau_Temp(5) - dpair(2) * fpair(2) |
| 1174 |
tau_Temp(6) = tau_Temp(6) - dpair(2) * fpair(3) |
| 1175 |
tau_Temp(7) = tau_Temp(7) - dpair(3) * fpair(1) |
| 1176 |
tau_Temp(8) = tau_Temp(8) - dpair(3) * fpair(2) |
| 1177 |
tau_Temp(9) = tau_Temp(9) - dpair(3) * fpair(3) |
| 1178 |
|
| 1179 |
virial_Temp = virial_Temp + & |
| 1180 |
(tau_Temp(1) + tau_Temp(5) + tau_Temp(9)) |
| 1181 |
|
| 1182 |
end subroutine add_stress_tensor |
| 1183 |
|
| 1184 |
end module do_Forces |
| 1185 |
|
