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Comparing trunk/OOPSE/libmdtools/do_Forces.F90 (file contents):
Revision 900 by chuckv, Tue Jan 6 18:54:57 2004 UTC vs.
Revision 1199 by gezelter, Thu May 27 15:21:20 2004 UTC

#	Line 4 | Line 4
4
5		!! @author Charles F. Vardeman II
6		!! @author Matthew Meineke
7	<	!! @version $Id: do_Forces.F90,v 1.45 2004-01-06 18:54:57 chuckv Exp $, $Date: 2004-01-06 18:54:57 $, $Name: not supported by cvs2svn $, $Revision: 1.45 $
7	>	!! @version $Id: do_Forces.F90,v 1.64 2004-05-27 15:21:20 gezelter Exp $, $Date: 2004-05-27 15:21:20 $, $Name: not supported by cvs2svn $, $Revision: 1.64 $
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
#	Line 29 | Line 31 | module do_Forces
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.
#	Line 38 | Line 44 | module do_Forces
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
#	Line 52 | Line 60 | module do_Forces
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
#	Line 59 | Line 68 | module do_Forces
68		public :: do_force_loop
69		public :: setRlistDF
70
62	–
71		#ifdef PROFILE
72		public :: getforcetime
73		real, save :: forceTime = 0
#	Line 73 | Line 81 | module do_Forces
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
#	Line 114 | Line 124 | contains
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
#	Line 137 | Line 156 | contains
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()
#	Line 145 | Line 165 | contains
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
#	Line 236 | Line 257 | contains
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	<
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
#	Line 337 | Line 362 | contains
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, A, u_l, f, t, tau, pot, do_pot_c, do_stress_c, &
374	<	error)
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
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
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
#	Line 362 | Line 391 | contains
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 :: nrow
398	<	integer :: ncol
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, jbeg, jend, jnab
405	>	integer :: i, j, jstart, jend, jnab
406	>	integer :: istart, iend
407	>	integer :: ia, jb, atom1, atom2
408		integer :: nlist
409	<	real( kind = DP ) ::  rijsq
410	<	real(kind=dp),dimension(3) :: d
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
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	<
422	>
423		!! initialize local variables
424	<
424	>
425		#ifdef IS_MPI
426		pot_local = 0.0_dp
427	<	nrow   = getNrow(plan_row)
428	<	ncol   = getNcol(plan_col)
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	<
434	>
435		call doReadyCheck(localError)
436		if ( localError .ne. 0 ) then
437		call handleError("do_force_loop", "Not Initialized")
#	Line 401 | Line 439 | contains
439		return
440		end if
441		call zero_work_arrays()
442	<
442	>
443		do_pot = do_pot_c
444		do_stress = do_stress_c
445	<
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,q_Row,plan_row3d)
454	<	call gather(q,q_Col,plan_col3d)
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_row3d)
458	<	call gather(u_l,u_l_Col,plan_col3d)
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_row_rotation)
461	<	call gather(A,A_Col,plan_col_rotation)
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:
465	>
466	>	!! Begin force loop timing:
467		#ifdef PROFILE
468		call cpu_time(forceTimeInitial)
469		nloops = nloops + 1
470		#endif
471	<
471	>
472	>	loopEnd = PAIR_LOOP
473		if (FF_RequiresPrepairCalc() .and. SIM_requires_prepair_calc) then
474	<	!! See if we need to update neighbor lists
475	<	call checkNeighborList(nlocal, q, listSkin, update_nlist)
476	<	!! if_mpi_gather_stuff_for_prepair
477	<	!! do_prepair_loop_if_needed
478	<	!! if_mpi_scatter_stuff_from_prepair
479	<	!! if_mpi_gather_stuff_from_prepair_to_main_loop
480	<
481	<	!--------------------PREFORCE LOOP----------->>>>>>>>>>>>>>>>>>>>>>>>>>>
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	>	call checkNeighborList(nGroups, q_group, listSkin, update_nlist)
485	>	endif
486	>
487	>	if (update_nlist) then
488	>	!! save current configuration and construct neighbor list
489		#ifdef IS_MPI
490	<
491	<	if (update_nlist) then
490	>	call saveNeighborList(nGroupsInRow, q_group)
491	>	#else
492	>	call saveNeighborList(nGroups, q_group)
493	>	#endif
494	>	neighborListSize = size(list)
495	>	nlist = 0
496	>	endif
497
498	<	!! save current configuration, construct neighbor list,
499	<	!! and calculate forces
500	<	call saveNeighborList(nlocal, q)
501	<
502	<	neighborListSize = size(list)
503	<	nlist = 0
504	<
451	<	do i = 1, nrow
452	<	point(i) = nlist + 1
498	>	istart = 1
499	>	#ifdef IS_MPI
500	>	iend = nGroupsInRow
501	>	#else
502	>	iend = nGroups - 1
503	>	#endif
504	>	outer: do i = istart, iend
505
506	<	prepair_inner: do j = 1, ncol
507	<
508	<	if (skipThisPair(i,j)) cycle prepair_inner
509	<
510	<	call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq)
511	<
512	<	if (rijsq < rlistsq) then
513	<
514	<	nlist = nlist + 1
515	<
516	<	if (nlist > neighborListSize) then
517	<	call expandNeighborList(nlocal, 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	<	call do_prepair(i, j, rijsq, d, do_pot, do_stress, u_l, A, f, t, pot_local)
506	>	if (update_nlist) point(i) = nlist + 1
507	>
508	>	n_in_i = groupStartRow(i+1) - groupStartRow(i)
509	>
510	>	if (update_nlist) then
511	>	#ifdef IS_MPI
512	>	jstart = 1
513	>	jend = nGroupsInCol
514	>	#else
515	>	jstart = i+1
516	>	jend = nGroups
517	>	#endif
518	>	else
519	>	jstart = point(i)
520	>	jend = point(i+1) - 1
521	>	! make sure group i has neighbors
522	>	if (jstart .gt. jend) cycle outer
523	>	endif
524	>
525	>	do jnab = jstart, jend
526	>	if (update_nlist) then
527	>	j = jnab
528	>	else
529	>	j = list(jnab)
530		endif
477	–	enddo prepair_inner
478	–	enddo
531
532	<	point(nrow + 1) = nlist + 1
533	<
534	<	else  !! (of update_check)
483	<
484	<	! use the list to find the neighbors
485	<	do i = 1, nrow
486	<	JBEG = POINT(i)
487	<	JEND = POINT(i+1) - 1
488	<	! check thiat molecule i has neighbors
489	<	if (jbeg .le. jend) then
490	<
491	<	do jnab = jbeg, jend
492	<	j = list(jnab)
493	<
494	<	call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq)
495	<	call do_prepair(i, j, rijsq, d, do_pot, do_stress, &
496	<	u_l, A, f, t, pot_local)
497	<
498	<	enddo
499	<	endif
500	<	enddo
501	<	endif
502	<
532	>	#ifdef IS_MPI
533	>	call get_interatomic_vector(q_group_Row(:,i), &
534	>	q_group_Col(:,j), d_grp, rgrpsq)
535		#else
536	<
537	<	if (update_nlist) then
538	<
507	<	! save current configuration, contruct neighbor list,
508	<	! and calculate forces
509	<	call saveNeighborList(natoms, q)
510	<
511	<	neighborListSize = size(list)
512	<
513	<	nlist = 0
536	>	call get_interatomic_vector(q_group(:,i), &
537	>	q_group(:,j), d_grp, rgrpsq)
538	>	#endif
539
540	<	do i = 1, natoms-1
541	<	point(i) = nlist + 1
542	<
543	<	prepair_inner: do j = i+1, natoms
544	<
545	<	if (skipThisPair(i,j))  cycle prepair_inner
546	<
547	<	call get_interatomic_vector(q(:,i), q(:,j), d, rijsq)
548	<
549	<
550	<	if (rijsq < rlistsq) then
551	<
552	<
553	<	nlist = nlist + 1
554	<
555	<	if (nlist > neighborListSize) then
556	<	call expandNeighborList(natoms, listerror)
557	<	if (listerror /= 0) then
558	<	error = -1
534	<	write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded."
535	<	return
536	<	end if
537	<	neighborListSize = size(list)
540	>	if (rgrpsq < rlistsq) then
541	>	if (update_nlist) then
542	>	nlist = nlist + 1
543	>
544	>	if (nlist > neighborListSize) then
545	>	#ifdef IS_MPI
546	>	call expandNeighborList(nGroupsInRow, listerror)
547	>	#else
548	>	call expandNeighborList(nGroups, listerror)
549	>	#endif
550	>	if (listerror /= 0) then
551	>	error = -1
552	>	write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded."
553	>	return
554	>	end if
555	>	neighborListSize = size(list)
556	>	endif
557	>
558	>	list(nlist) = j
559		endif
560
561	<	list(nlist) = j
561	>	if (loop .eq. PAIR_LOOP) then
562	>	vij = 0.0d0
563	>	fij(1:3) = 0.0d0
564	>	endif
565
566	<	call do_prepair(i, j, rijsq, d, do_pot, do_stress, &
567	<	u_l, A, f, t, pot)
566	>	call get_switch(rgrpsq, sw, dswdr, rgrp, group_switch, &
567	>	in_switching_region)
568
569	<	endif
570	<	enddo prepair_inner
571	<	enddo
572	<
573	<	point(natoms) = nlist + 1
574	<
575	<	else !! (update)
576	<
577	<	! use the list to find the neighbors
578	<	do i = 1, natoms-1
579	<	JBEG = POINT(i)
580	<	JEND = POINT(i+1) - 1
581	<	! check thiat molecule i has neighbors
582	<	if (jbeg .le. jend) then
583	<
584	<	do jnab = jbeg, jend
561	<	j = list(jnab)
562	<
563	<	call get_interatomic_vector(q(:,i), q(:,j), d, rijsq)
564	<	call do_prepair(i, j, rijsq, d, do_pot, do_stress, &
565	<	u_l, A, f, t, pot)
566	<
567	<	enddo
568	<	endif
569	<	enddo
570	<	endif
571	<	#endif
572	<	!! Do rest of preforce calculations
573	<	!! do necessary preforce calculations
574	<	call do_preforce(nlocal,pot)
575	<	! we have already updated the neighbor list set it to false...
576	<	update_nlist = .false.
577	<	else
578	<	!! See if we need to update neighbor lists for non pre-pair
579	<	call checkNeighborList(nlocal, q, listSkin, update_nlist)
580	<	endif
581	<
582	<
583	<
584	<
585	<
586	<	!---------------------------------MAIN Pair LOOP->>>>>>>>>>>>>>>>>>>>>>>>>>>>
587	<
588	<
589	<
590	<
591	<
569	>	n_in_j = groupStartCol(j+1) - groupStartCol(j)
570	>
571	>	do ia = groupStartRow(i), groupStartRow(i+1)-1
572	>
573	>	atom1 = groupListRow(ia)
574	>
575	>	inner: do jb = groupStartCol(j), groupStartCol(j+1)-1
576	>
577	>	atom2 = groupListCol(jb)
578	>
579	>	if (skipThisPair(atom1, atom2)) cycle inner
580	>
581	>	if ((n_in_i .eq. 1).and.(n_in_j .eq. 1)) then
582	>	d_atm(1:3) = d_grp(1:3)
583	>	ratmsq = rgrpsq
584	>	else
585		#ifdef IS_MPI
586	<
587	<	if (update_nlist) then
588	<	!! save current configuration, construct neighbor list,
589	<	!! and calculate forces
590	<	call saveNeighborList(nlocal, q)
591	<
592	<	neighborListSize = size(list)
593	<	nlist = 0
594	<
595	<	do i = 1, nrow
596	<
597	<	point(i) = nlist + 1
598	<
599	<	inner: do j = 1, ncol
600	<
601	<	if (skipThisPair(i,j)) cycle inner
602	<
603	<	call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq)
604	<
605	<	if (rijsq < rlistsq) then
586	>	call get_interatomic_vector(q_Row(:,atom1), &
587	>	q_Col(:,atom2), d_atm, ratmsq)
588	>	#else
589	>	call get_interatomic_vector(q(:,atom1), &
590	>	q(:,atom2), d_atm, ratmsq)
591	>	#endif
592	>	endif
593	>	if (loop .eq. PREPAIR_LOOP) then
594	>	#ifdef IS_MPI
595	>	call do_prepair(atom1, atom2, ratmsq, d_atm, sw, &
596	>	rgrpsq, d_grp, do_pot, do_stress, &
597	>	u_l, A, f, t, pot_local)
598	>	#else
599	>	call do_prepair(atom1, atom2, ratmsq, d_atm, sw, &
600	>	rgrpsq, d_grp, do_pot, do_stress, &
601	>	u_l, A, f, t, pot)
602	>	#endif
603	>	else
604	>	#ifdef IS_MPI
605	>	call do_pair(atom1, atom2, ratmsq, d_atm, sw, &
606	>	do_pot, &
607	>	u_l, A, f, t, pot_local, vpair, fpair)
608	>	#else
609	>	call do_pair(atom1, atom2, ratmsq, d_atm, sw, &
610	>	do_pot,  &
611	>	u_l, A, f, t, pot, vpair, fpair)
612	>	#endif
613	>	vij = vij + vpair
614	>	fij(1:3) = fij(1:3) + fpair(1:3)
615	>	endif
616	>	enddo inner
617	>	enddo
618
619	<	nlist = nlist + 1
620	<
621	<	if (nlist > neighborListSize) then
622	<	call expandNeighborList(nlocal, listerror)
623	<	if (listerror /= 0) then
624	<	error = -1
625	<	write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded."
626	<	return
627	<	end if
628	<	neighborListSize = size(list)
619	>	if (loop .eq. PAIR_LOOP) then
620	>	if (in_switching_region) then
621	>	swderiv = vij*dswdr/rgrp
622	>	fij(1) = fij(1) + swderiv*d_grp(1)
623	>	fij(2) = fij(2) + swderiv*d_grp(2)
624	>	fij(3) = fij(3) + swderiv*d_grp(3)
625	>
626	>	do ia=groupStartRow(i), groupStartRow(i+1)-1
627	>	atom1=groupListRow(ia)
628	>	mf = mfactRow(atom1)
629	>	#ifdef IS_MPI
630	>	f_Row(1,atom1) = f_Row(1,atom1) + swderiv*d_grp(1)*mf
631	>	f_Row(2,atom1) = f_Row(2,atom1) + swderiv*d_grp(2)*mf
632	>	f_Row(3,atom1) = f_Row(3,atom1) + swderiv*d_grp(3)*mf
633	>	#else
634	>	f(1,atom1) = f(1,atom1) + swderiv*d_grp(1)*mf
635	>	f(2,atom1) = f(2,atom1) + swderiv*d_grp(2)*mf
636	>	f(3,atom1) = f(3,atom1) + swderiv*d_grp(3)*mf
637	>	#endif
638	>	enddo
639	>
640	>	do jb=groupStartCol(j), groupStartCol(j+1)-1
641	>	atom2=groupListCol(jb)
642	>	mf = mfactCol(atom2)
643	>	#ifdef IS_MPI
644	>	f_Col(1,atom2) = f_Col(1,atom2) - swderiv*d_grp(1)*mf
645	>	f_Col(2,atom2) = f_Col(2,atom2) - swderiv*d_grp(2)*mf
646	>	f_Col(3,atom2) = f_Col(3,atom2) - swderiv*d_grp(3)*mf
647	>	#else
648	>	f(1,atom2) = f(1,atom2) - swderiv*d_grp(1)*mf
649	>	f(2,atom2) = f(2,atom2) - swderiv*d_grp(2)*mf
650	>	f(3,atom2) = f(3,atom2) - swderiv*d_grp(3)*mf
651	>	#endif
652	>	enddo
653	>	endif
654	>
655	>	if (do_stress) call add_stress_tensor(d_grp, fij)
656		endif
657	<
658	<	list(nlist) = j
659	<
628	<	call do_pair(i, j, rijsq, d, do_pot, do_stress, &
629	<	u_l, A, f, t, pot_local)
630	<
631	<	endif
632	<	enddo inner
633	<	enddo
634	<
635	<	point(nrow + 1) = nlist + 1
657	>	end if
658	>	enddo
659	>	enddo outer
660
661	<	else  !! (of update_check)
662	<
663	<	! use the list to find the neighbors
664	<	do i = 1, nrow
665	<	JBEG = POINT(i)
666	<	JEND = POINT(i+1) - 1
667	<	! check thiat molecule i has neighbors
668	<	if (jbeg .le. jend) then
669	<
670	<	do jnab = jbeg, jend
671	<	j = list(jnab)
648	<
649	<	call get_interatomic_vector(q_Row(:,i), q_Col(:,j), d, rijsq)
650	<	call do_pair(i, j, rijsq, d, do_pot, do_stress, &
651	<	u_l, A, f, t, pot_local)
652	<
653	<	enddo
661	>	if (update_nlist) then
662	>	#ifdef IS_MPI
663	>	point(nGroupsInRow + 1) = nlist + 1
664	>	#else
665	>	point(nGroups) = nlist + 1
666	>	#endif
667	>	if (loop .eq. PREPAIR_LOOP) then
668	>	! we just did the neighbor list update on the first
669	>	! pass, so we don't need to do it
670	>	! again on the second pass
671	>	update_nlist = .false.
672		endif
673	<	enddo
656	<	endif
657	<
658	<	#else
659	<
660	<	if (update_nlist) then
661	<
662	<	! save current configuration, contruct neighbor list,
663	<	! and calculate forces
664	<	call saveNeighborList(natoms, q)
665	<
666	<	neighborListSize = size(list)
667	<
668	<	nlist = 0
669	<
670	<	do i = 1, natoms-1
671	<	point(i) = nlist + 1
672	<
673	<	inner: do j = i+1, natoms
673	>	endif
674
675	<	if (skipThisPair(i,j))  cycle inner
676	<
677	<	call get_interatomic_vector(q(:,i), q(:,j), d, rijsq)
678	<
679	<
680	<	if (rijsq < rlistsq) then
681	<
682	<	nlist = nlist + 1
683	<
684	<	if (nlist > neighborListSize) then
685	<	call expandNeighborList(natoms, listerror)
686	<	if (listerror /= 0) then
687	<	error = -1
688	<	write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded."
689	<	return
690	<	end if
691	<	neighborListSize = size(list)
692	<	endif
693	<
694	<	list(nlist) = j
695	<
696	<	call do_pair(i, j, rijsq, d, do_pot, do_stress, &
697	<	u_l, A, f, t, pot)
698	<
699	<	endif
700	<	enddo inner
701	<	enddo
675	>	if (loop .eq. PREPAIR_LOOP) then
676	>	call do_preforce(nlocal, pot)
677	>	endif
678
679	<	point(natoms) = nlist + 1
704	<
705	<	else !! (update)
706	<
707	<	! use the list to find the neighbors
708	<	do i = 1, natoms-1
709	<	JBEG = POINT(i)
710	<	JEND = POINT(i+1) - 1
711	<	! check thiat molecule i has neighbors
712	<	if (jbeg .le. jend) then
713	<
714	<	do jnab = jbeg, jend
715	<	j = list(jnab)
716	<
717	<	call get_interatomic_vector(q(:,i), q(:,j), d, rijsq)
718	<	call do_pair(i, j, rijsq, d, do_pot, do_stress, &
719	<	u_l, A, f, t, pot)
720	<
721	<	enddo
722	<	endif
723	<	enddo
724	<	endif
679	>	enddo
680
681	<	#endif
727	<
728	<	! phew, done with main loop.
729	<
730	<	!! Do timing
681	>	!! Do timing
682		#ifdef PROFILE
683		call cpu_time(forceTimeFinal)
684		forceTime = forceTime + forceTimeFinal - forceTimeInitial
685	<	#endif
686	<
736	<
685	>	#endif
686	>
687		#ifdef IS_MPI
688		!!distribute forces
689	<
689	>
690		f_temp = 0.0_dp
691	<	call scatter(f_Row,f_temp,plan_row3d)
691	>	call scatter(f_Row,f_temp,plan_atom_row_3d)
692		do i = 1,nlocal
693		f(1:3,i) = f(1:3,i) + f_temp(1:3,i)
694		end do
695	<
695	>
696		f_temp = 0.0_dp
697	<	call scatter(f_Col,f_temp,plan_col3d)
697	>	call scatter(f_Col,f_temp,plan_atom_col_3d)
698		do i = 1,nlocal
699		f(1:3,i) = f(1:3,i) + f_temp(1:3,i)
700		end do
701
702		if (FF_UsesDirectionalAtoms() .and. SIM_uses_directional_atoms) then
703		t_temp = 0.0_dp
704	<	call scatter(t_Row,t_temp,plan_row3d)
704	>	call scatter(t_Row,t_temp,plan_atom_row_3d)
705		do i = 1,nlocal
706		t(1:3,i) = t(1:3,i) + t_temp(1:3,i)
707		end do
708		t_temp = 0.0_dp
709	<	call scatter(t_Col,t_temp,plan_col3d)
709	>	call scatter(t_Col,t_temp,plan_atom_col_3d)
710
711		do i = 1,nlocal
712		t(1:3,i) = t(1:3,i) + t_temp(1:3,i)
#	Line 765 | Line 715 | contains
715
716		if (do_pot) then
717		! scatter/gather pot_row into the members of my column
718	<	call scatter(pot_Row, pot_Temp, plan_row)
719	<
718	>	call scatter(pot_Row, pot_Temp, plan_atom_row)
719	>
720		! scatter/gather pot_local into all other procs
721		! add resultant to get total pot
722		do i = 1, nlocal
#	Line 774 | Line 724 | contains
724		enddo
725
726		pot_Temp = 0.0_DP
727	<
728	<	call scatter(pot_Col, pot_Temp, plan_col)
727	>
728	>	call scatter(pot_Col, pot_Temp, plan_atom_col)
729		do i = 1, nlocal
730		pot_local = pot_local + pot_Temp(i)
731		enddo
732	<
733	<	endif
732	>
733	>	endif
734		#endif
735	<
735	>
736		if (FF_RequiresPostpairCalc() .and. SIM_requires_postpair_calc) then
737
738		if (FF_uses_RF .and. SIM_uses_RF) then
739
740		#ifdef IS_MPI
741	<	call scatter(rf_Row,rf,plan_row3d)
742	<	call scatter(rf_Col,rf_Temp,plan_col3d)
741	>	call scatter(rf_Row,rf,plan_atom_row_3d)
742	>	call scatter(rf_Col,rf_Temp,plan_atom_col_3d)
743		do i = 1,nlocal
744		rf(1:3,i) = rf(1:3,i) + rf_Temp(1:3,i)
745		end do
746		#endif
747
748		do i = 1, nLocal
749	<
749	>
750		rfpot = 0.0_DP
751		#ifdef IS_MPI
752		me_i = atid_row(i)
753		#else
754		me_i = atid(i)
755		#endif
756	<
756	>
757		if (PropertyMap(me_i)%is_DP) then
758	<
758	>
759		mu_i = PropertyMap(me_i)%dipole_moment
760	<
760	>
761		!! The reaction field needs to include a self contribution
762		!! to the field:
763		call accumulate_self_rf(i, mu_i, u_l)
#	Line 824 | Line 774 | contains
774		enddo
775		endif
776		endif
777	<
778	<
777	>
778	>
779		#ifdef IS_MPI
780	<
780	>
781		if (do_pot) then
782		pot = pot + pot_local
783		!! we assume the c code will do the allreduce to get the total potential
784		!! we could do it right here if we needed to...
785		endif
786	<
786	>
787		if (do_stress) then
788	<	call mpi_allreduce(tau_Temp, tau, 9,mpi_double_precision,mpi_sum, &
788	>	call mpi_allreduce(tau_Temp, tau, 9,mpi_double_precision,mpi_sum, &
789		mpi_comm_world,mpi_err)
790		call mpi_allreduce(virial_Temp, virial,1,mpi_double_precision,mpi_sum, &
791		mpi_comm_world,mpi_err)
792		endif
793	<
793	>
794		#else
795	<
795	>
796		if (do_stress) then
797		tau = tau_Temp
798		virial = virial_Temp
799		endif
800
801		#endif
802	<
853	<
854	<
802	>
803		end subroutine do_force_loop
804	+
805	+	subroutine do_pair(i, j, rijsq, d, sw, do_pot, &
806	+	u_l, A, f, t, pot, vpair, fpair)
807
808	<	subroutine do_pair(i, j, rijsq, d, do_pot, do_stress, u_l, A, f, t, pot)
809	<
810	<	real( kind = dp ) :: pot
808	>	real( kind = dp ) :: pot, vpair, sw
809	>	real( kind = dp ), dimension(3) :: fpair
810	>	real( kind = dp ), dimension(nLocal)   :: mfact
811		real( kind = dp ), dimension(3,nLocal) :: u_l
812	<	real (kind=dp), dimension(9,nLocal) :: A
813	<	real (kind=dp), dimension(3,nLocal) :: f
814	<	real (kind=dp), dimension(3,nLocal) :: t
812	>	real( kind = dp ), dimension(9,nLocal) :: A
813	>	real( kind = dp ), dimension(3,nLocal) :: f
814	>	real( kind = dp ), dimension(3,nLocal) :: t
815
816	<	logical, intent(inout) :: do_pot, do_stress
816	>	logical, intent(inout) :: do_pot
817		integer, intent(in) :: i, j
818	<	real ( kind = dp ), intent(inout)    :: rijsq
818	>	real ( kind = dp ), intent(inout) :: rijsq
819		real ( kind = dp )                :: r
820		real ( kind = dp ), intent(inout) :: d(3)
870	–	logical :: is_LJ_i, is_LJ_j
871	–	logical :: is_DP_i, is_DP_j
872	–	logical :: is_GB_i, is_GB_j
873	–	logical :: is_EAM_i,is_EAM_j
874	–	logical :: is_Sticky_i, is_Sticky_j
821		integer :: me_i, me_j
822	<	integer :: propPack_i
877	<	integer :: propPack_j
822	>
823		r = sqrt(rijsq)
824	+	vpair = 0.0d0
825	+	fpair(1:3) = 0.0d0
826
827		#ifdef IS_MPI
828	<	if (tagRow(i) .eq. tagColumn(j)) then
829	<	write(0,*) 'do_pair is doing', i , j, tagRow(i), tagColumn(j)
828	>	if (AtomRowToGlobal(i) .eq. AtomColToGlobal(j)) then
829	>	write(0,*) 'do_pair is doing', i , j, AtomRowToGlobal(i), AtomColToGlobal(j)
830		endif
884	–
831		me_i = atid_row(i)
832		me_j = atid_col(j)
887	–
833		#else
889	–
834		me_i = atid(i)
835		me_j = atid(j)
892	–
836		#endif
837
838		if (FF_uses_LJ .and. SIM_uses_LJ) then
839	+
840	+	if ( PropertyMap(me_i)%is_LJ .and. PropertyMap(me_j)%is_LJ ) then
841	+	!write(*,*) 'calling lj with'
842	+	!write(*,*) i, j, r, rijsq
843	+	!write(*,'(3es12.3)') d(1), d(2), d(3)
844	+	!write(*,'(3es12.3)') sw, vpair, pot
845	+	!write(*,*)
846
847	<	if ( PropertyMap(me_i)%is_LJ .and. PropertyMap(me_j)%is_LJ ) &
848	<	call do_lj_pair(i, j, d, r, rijsq, pot, f, do_pot, do_stress)
849	<
847	>	call do_lj_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, f, do_pot)
848	>	endif
849	>
850		endif
851	<
851	>
852	>	if (FF_uses_charges .and. SIM_uses_charges) then
853	>
854	>	if (PropertyMap(me_i)%is_Charge .and. PropertyMap(me_j)%is_Charge) then
855	>	call do_charge_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, f, do_pot)
856	>	endif
857	>
858	>	endif
859	>
860		if (FF_uses_dipoles .and. SIM_uses_dipoles) then
861
862		if ( PropertyMap(me_i)%is_DP .and. PropertyMap(me_j)%is_DP) then
863	<	call do_dipole_pair(i, j, d, r, rijsq, pot, u_l, f, t, &
864	<	do_pot, do_stress)
863	>	call do_dipole_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, u_l, f, t, &
864	>	do_pot)
865		if (FF_uses_RF .and. SIM_uses_RF) then
866	<	call accumulate_rf(i, j, r, u_l)
867	<	call rf_correct_forces(i, j, d, r, u_l, f, do_stress)
868	<	endif
911	<
866	>	call accumulate_rf(i, j, r, u_l, sw)
867	>	call rf_correct_forces(i, j, d, r, u_l, sw, f, fpair)
868	>	endif
869		endif
870	+
871		endif
872
873		if (FF_uses_Sticky .and. SIM_uses_sticky) then
874
875		if ( PropertyMap(me_i)%is_Sticky .and. PropertyMap(me_j)%is_Sticky) then
876	<	call do_sticky_pair(i, j, d, r, rijsq, A, pot, f, t, &
877	<	do_pot, do_stress)
876	>	call do_sticky_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, A, f, t, &
877	>	do_pot)
878		endif
879	+
880		endif
881
882
883		if (FF_uses_GB .and. SIM_uses_GB) then
884
885		if ( PropertyMap(me_i)%is_GB .and. PropertyMap(me_j)%is_GB) then
886	<	call do_gb_pair(i, j, d, r, rijsq, u_l, pot, f, t, &
887	<	do_pot, do_stress)
886	>	call do_gb_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, u_l, f, t, &
887	>	do_pot)
888		endif
889
890		endif
891	<
892	<
893	<
894	<	if (FF_uses_EAM .and. SIM_uses_EAM) then
895	<
896	<	if ( PropertyMap(me_i)%is_EAM .and. PropertyMap(me_j)%is_EAM) then
897	<	call do_eam_pair(i, j, d, r, rijsq, pot, f, do_pot, do_stress)
898	<	endif
899	<
900	<	endif
942	<
891	>
892	>	if (FF_uses_EAM .and. SIM_uses_EAM) then
893	>
894	>	if ( PropertyMap(me_i)%is_EAM .and. PropertyMap(me_j)%is_EAM) then
895	>	call do_eam_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, f, &
896	>	do_pot)
897	>	endif
898	>
899	>	endif
900	>
901		end subroutine do_pair
902
903	+	subroutine do_prepair(i, j, rijsq, d, sw, rcijsq, dc, &
904	+	do_pot, do_stress, u_l, A, f, t, pot)
905
906	<
947	<	subroutine do_prepair(i, j, rijsq, d, do_pot, do_stress, u_l, A, f, t, pot)
948	<	real( kind = dp ) :: pot
906	>	real( kind = dp ) :: pot, sw
907		real( kind = dp ), dimension(3,nLocal) :: u_l
908		real (kind=dp), dimension(9,nLocal) :: A
909		real (kind=dp), dimension(3,nLocal) :: f
#	Line 953 | Line 911 | contains
911
912		logical, intent(inout) :: do_pot, do_stress
913		integer, intent(in) :: i, j
914	<	real ( kind = dp ), intent(inout)    :: rijsq
915	<	real ( kind = dp )                :: r
916	<	real ( kind = dp ), intent(inout) :: d(3)
914	>	real ( kind = dp ), intent(inout)    :: rijsq, rcijsq
915	>	real ( kind = dp )                :: r, rc
916	>	real ( kind = dp ), intent(inout) :: d(3), dc(3)
917
918		logical :: is_EAM_i, is_EAM_j
919
920		integer :: me_i, me_j
921
922	<	r = sqrt(rijsq)
922	>
923	>	r = sqrt(rijsq)
924	>	if (SIM_uses_molecular_cutoffs) then
925	>	rc = sqrt(rcijsq)
926	>	else
927	>	rc = r
928	>	endif
929
930
931		#ifdef IS_MPI
932	<	if (tagRow(i) .eq. tagColumn(j)) then
933	<	write(0,*) 'do_pair is doing', i , j, tagRow(i), tagColumn(j)
932	>	if (AtomRowToGlobal(i) .eq. AtomColToGlobal(j)) then
933	>	write(0,*) 'do_prepair is doing', i , j, AtomRowToGlobal(i), AtomColToGlobal(j)
934		endif
935
936		me_i = atid_row(i)
#	Line 978 | Line 942 | contains
942		me_j = atid(j)
943
944		#endif
945	<
945	>
946		if (FF_uses_EAM .and. SIM_uses_EAM) then
947	<
947	>
948		if (PropertyMap(me_i)%is_EAM .and. PropertyMap(me_j)%is_EAM) &
949		call calc_EAM_prepair_rho(i, j, d, r, rijsq )
950	<
950	>
951		endif
952
953		end subroutine do_prepair
990	–
991	–
992	–
993	–
994	–	subroutine do_preforce(nlocal,pot)
995	–	integer :: nlocal
996	–	real( kind = dp ) :: pot
997	–
998	–	if (FF_uses_EAM .and. SIM_uses_EAM) then
999	–	call calc_EAM_preforce_Frho(nlocal,pot)
1000	–	endif
1001	–
1002	–
1003	–	end subroutine do_preforce
1004	–
1005	–
1006	–	subroutine get_interatomic_vector(q_i, q_j, d, r_sq)
1007	–
1008	–	real (kind = dp), dimension(3) :: q_i
1009	–	real (kind = dp), dimension(3) :: q_j
1010	–	real ( kind = dp ), intent(out) :: r_sq
1011	–	real( kind = dp ) :: d(3), scaled(3)
1012	–	integer i
1013	–
1014	–	d(1:3) = q_j(1:3) - q_i(1:3)
1015	–
1016	–	! Wrap back into periodic box if necessary
1017	–	if ( SIM_uses_PBC ) then
1018	–
1019	–	if( .not.boxIsOrthorhombic ) then
1020	–	! calc the scaled coordinates.
1021	–
1022	–	scaled = matmul(HmatInv, d)
1023	–
1024	–	! wrap the scaled coordinates
1025	–
1026	–	scaled = scaled  - anint(scaled)
1027	–
1028	–
1029	–	! calc the wrapped real coordinates from the wrapped scaled
1030	–	! coordinates
1031	–
1032	–	d = matmul(Hmat,scaled)
1033	–
1034	–	else
1035	–	! calc the scaled coordinates.
1036	–
1037	–	do i = 1, 3
1038	–	scaled(i) = d(i) * HmatInv(i,i)
1039	–
1040	–	! wrap the scaled coordinates
1041	–
1042	–	scaled(i) = scaled(i) - anint(scaled(i))
1043	–
1044	–	! calc the wrapped real coordinates from the wrapped scaled
1045	–	! coordinates
1046	–
1047	–	d(i) = scaled(i)*Hmat(i,i)
1048	–	enddo
1049	–	endif
1050	–
1051	–	endif
1052	–
1053	–	r_sq = dot_product(d,d)
1054	–
1055	–	end subroutine get_interatomic_vector
1056	–
1057	–	subroutine zero_work_arrays()
1058	–
1059	–	#ifdef IS_MPI
1060	–
1061	–	q_Row = 0.0_dp
1062	–	q_Col = 0.0_dp
1063	–
1064	–	u_l_Row = 0.0_dp
1065	–	u_l_Col = 0.0_dp
1066	–
1067	–	A_Row = 0.0_dp
1068	–	A_Col = 0.0_dp
1069	–
1070	–	f_Row = 0.0_dp
1071	–	f_Col = 0.0_dp
1072	–	f_Temp = 0.0_dp
1073	–
1074	–	t_Row = 0.0_dp
1075	–	t_Col = 0.0_dp
1076	–	t_Temp = 0.0_dp
954
1078	–	pot_Row = 0.0_dp
1079	–	pot_Col = 0.0_dp
1080	–	pot_Temp = 0.0_dp
1081	–
1082	–	rf_Row = 0.0_dp
1083	–	rf_Col = 0.0_dp
1084	–	rf_Temp = 0.0_dp
1085	–
1086	–	#endif
1087	–
955
956	<	if (FF_uses_EAM .and. SIM_uses_EAM) then
957	<	call clean_EAM()
958	<	endif
959	<
960	<
961	<
962	<
963	<
964	<	rf = 0.0_dp
965	<	tau_Temp = 0.0_dp
966	<	virial_Temp = 0.0_dp
967	<	end subroutine zero_work_arrays
968	<
969	<	function skipThisPair(atom1, atom2) result(skip_it)
970	<	integer, intent(in) :: atom1
971	<	integer, intent(in), optional :: atom2
972	<	logical :: skip_it
973	<	integer :: unique_id_1, unique_id_2
974	<	integer :: me_i,me_j
975	<	integer :: i
976	<
977	<	skip_it = .false.
978	<
979	<	!! there are a number of reasons to skip a pair or a particle
980	<	!! mostly we do this to exclude atoms who are involved in short
981	<	!! range interactions (bonds, bends, torsions), but we also need
982	<	!! to exclude some overcounted interactions that result from
983	<	!! the parallel decomposition
984	<
985	<	#ifdef IS_MPI
986	<	!! in MPI, we have to look up the unique IDs for each atom
987	<	unique_id_1 = tagRow(atom1)
988	<	#else
989	<	!! in the normal loop, the atom numbers are unique
990	<	unique_id_1 = atom1
991	<	#endif
992	<
993	<	!! We were called with only one atom, so just check the global exclude
994	<	!! list for this atom
995	<	if (.not. present(atom2)) then
996	<	do i = 1, nExcludes_global
997	<	if (excludesGlobal(i) == unique_id_1) then
998	<	skip_it = .true.
999	<	return
1000	<	end if
1001	<	end do
1002	<	return
1003	<	end if
1004	<
1005	<	#ifdef IS_MPI
1006	<	unique_id_2 = tagColumn(atom2)
1007	<	#else
1008	<	unique_id_2 = atom2
1009	<	#endif
956	>	subroutine do_preforce(nlocal,pot)
957	>	integer :: nlocal
958	>	real( kind = dp ) :: pot
959	>
960	>	if (FF_uses_EAM .and. SIM_uses_EAM) then
961	>	call calc_EAM_preforce_Frho(nlocal,pot)
962	>	endif
963	>
964	>
965	>	end subroutine do_preforce
966	>
967	>
968	>	subroutine get_interatomic_vector(q_i, q_j, d, r_sq)
969	>
970	>	real (kind = dp), dimension(3) :: q_i
971	>	real (kind = dp), dimension(3) :: q_j
972	>	real ( kind = dp ), intent(out) :: r_sq
973	>	real( kind = dp ) :: d(3), scaled(3)
974	>	integer i
975	>
976	>	d(1:3) = q_j(1:3) - q_i(1:3)
977	>
978	>	! Wrap back into periodic box if necessary
979	>	if ( SIM_uses_PBC ) then
980	>
981	>	if( .not.boxIsOrthorhombic ) then
982	>	! calc the scaled coordinates.
983	>
984	>	scaled = matmul(HmatInv, d)
985	>
986	>	! wrap the scaled coordinates
987	>
988	>	scaled = scaled  - anint(scaled)
989	>
990	>
991	>	! calc the wrapped real coordinates from the wrapped scaled
992	>	! coordinates
993	>
994	>	d = matmul(Hmat,scaled)
995	>
996	>	else
997	>	! calc the scaled coordinates.
998	>
999	>	do i = 1, 3
1000	>	scaled(i) = d(i) * HmatInv(i,i)
1001	>
1002	>	! wrap the scaled coordinates
1003	>
1004	>	scaled(i) = scaled(i) - anint(scaled(i))
1005	>
1006	>	! calc the wrapped real coordinates from the wrapped scaled
1007	>	! coordinates
1008	>
1009	>	d(i) = scaled(i)*Hmat(i,i)
1010	>	enddo
1011	>	endif
1012	>
1013	>	endif
1014	>
1015	>	r_sq = dot_product(d,d)
1016	>
1017	>	end subroutine get_interatomic_vector
1018	>
1019	>	subroutine zero_work_arrays()
1020	>
1021	>	#ifdef IS_MPI
1022	>
1023	>	q_Row = 0.0_dp
1024	>	q_Col = 0.0_dp
1025
1026	+	q_group_Row = 0.0_dp
1027	+	q_group_Col = 0.0_dp
1028	+
1029	+	u_l_Row = 0.0_dp
1030	+	u_l_Col = 0.0_dp
1031	+
1032	+	A_Row = 0.0_dp
1033	+	A_Col = 0.0_dp
1034	+
1035	+	f_Row = 0.0_dp
1036	+	f_Col = 0.0_dp
1037	+	f_Temp = 0.0_dp
1038	+
1039	+	t_Row = 0.0_dp
1040	+	t_Col = 0.0_dp
1041	+	t_Temp = 0.0_dp
1042	+
1043	+	pot_Row = 0.0_dp
1044	+	pot_Col = 0.0_dp
1045	+	pot_Temp = 0.0_dp
1046	+
1047	+	rf_Row = 0.0_dp
1048	+	rf_Col = 0.0_dp
1049	+	rf_Temp = 0.0_dp
1050	+
1051	+	#endif
1052	+
1053	+	if (FF_uses_EAM .and. SIM_uses_EAM) then
1054	+	call clean_EAM()
1055	+	endif
1056	+
1057	+	rf = 0.0_dp
1058	+	tau_Temp = 0.0_dp
1059	+	virial_Temp = 0.0_dp
1060	+	end subroutine zero_work_arrays
1061	+
1062	+	function skipThisPair(atom1, atom2) result(skip_it)
1063	+	integer, intent(in) :: atom1
1064	+	integer, intent(in), optional :: atom2
1065	+	logical :: skip_it
1066	+	integer :: unique_id_1, unique_id_2
1067	+	integer :: me_i,me_j
1068	+	integer :: i
1069	+
1070	+	skip_it = .false.
1071	+
1072	+	!! there are a number of reasons to skip a pair or a particle
1073	+	!! mostly we do this to exclude atoms who are involved in short
1074	+	!! range interactions (bonds, bends, torsions), but we also need
1075	+	!! to exclude some overcounted interactions that result from
1076	+	!! the parallel decomposition
1077	+
1078		#ifdef IS_MPI
1079	<	!! this situation should only arise in MPI simulations
1080	<	if (unique_id_1 == unique_id_2) then
1081	<	skip_it = .true.
1082	<	return
1083	<	end if
1150	<
1151	<	!! this prevents us from doing the pair on multiple processors
1152	<	if (unique_id_1 < unique_id_2) then
1153	<	if (mod(unique_id_1 + unique_id_2,2) == 0) then
1154	<	skip_it = .true.
1155	<	return
1156	<	endif
1157	<	else
1158	<	if (mod(unique_id_1 + unique_id_2,2) == 1) then
1159	<	skip_it = .true.
1160	<	return
1161	<	endif
1162	<	endif
1079	>	!! in MPI, we have to look up the unique IDs for each atom
1080	>	unique_id_1 = AtomRowToGlobal(atom1)
1081	>	#else
1082	>	!! in the normal loop, the atom numbers are unique
1083	>	unique_id_1 = atom1
1084		#endif
1085	+
1086	+	!! We were called with only one atom, so just check the global exclude
1087	+	!! list for this atom
1088	+	if (.not. present(atom2)) then
1089	+	do i = 1, nExcludes_global
1090	+	if (excludesGlobal(i) == unique_id_1) then
1091	+	skip_it = .true.
1092	+	return
1093	+	end if
1094	+	end do
1095	+	return
1096	+	end if
1097	+
1098	+	#ifdef IS_MPI
1099	+	unique_id_2 = AtomColToGlobal(atom2)
1100	+	#else
1101	+	unique_id_2 = atom2
1102	+	#endif
1103	+
1104	+	#ifdef IS_MPI
1105	+	!! this situation should only arise in MPI simulations
1106	+	if (unique_id_1 == unique_id_2) then
1107	+	skip_it = .true.
1108	+	return
1109	+	end if
1110	+
1111	+	!! this prevents us from doing the pair on multiple processors
1112	+	if (unique_id_1 < unique_id_2) then
1113	+	if (mod(unique_id_1 + unique_id_2,2) == 0) then
1114	+	skip_it = .true.
1115	+	return
1116	+	endif
1117	+	else
1118	+	if (mod(unique_id_1 + unique_id_2,2) == 1) then
1119	+	skip_it = .true.
1120	+	return
1121	+	endif
1122	+	endif
1123	+	#endif
1124	+
1125	+	!! the rest of these situations can happen in all simulations:
1126	+	do i = 1, nExcludes_global
1127	+	if ((excludesGlobal(i) == unique_id_1) .or. &
1128	+	(excludesGlobal(i) == unique_id_2)) then
1129	+	skip_it = .true.
1130	+	return
1131	+	endif
1132	+	enddo
1133	+
1134	+	do i = 1, nSkipsForAtom(unique_id_1)
1135	+	if (skipsForAtom(unique_id_1, i) .eq. unique_id_2) then
1136	+	skip_it = .true.
1137	+	return
1138	+	endif
1139	+	end do
1140	+
1141	+	return
1142	+	end function skipThisPair
1143
1144	<	!! the rest of these situations can happen in all simulations:
1145	<	do i = 1, nExcludes_global
1146	<	if ((excludesGlobal(i) == unique_id_1) .or. &
1147	<	(excludesGlobal(i) == unique_id_2)) then
1148	<	skip_it = .true.
1149	<	return
1150	<	endif
1151	<	enddo
1152	<
1153	<	do i = 1, nExcludes_local
1154	<	if (excludesLocal(1,i) == unique_id_1) then
1155	<	if (excludesLocal(2,i) == unique_id_2) then
1156	<	skip_it = .true.
1157	<	return
1158	<	endif
1159	<	else
1181	<	if (excludesLocal(1,i) == unique_id_2) then
1182	<	if (excludesLocal(2,i) == unique_id_1) then
1183	<	skip_it = .true.
1184	<	return
1185	<	endif
1186	<	endif
1187	<	endif
1188	<	end do
1189	<
1190	<	return
1191	<	end function skipThisPair
1192	<
1193	<	function FF_UsesDirectionalAtoms() result(doesit)
1194	<	logical :: doesit
1195	<	doesit = FF_uses_dipoles .or. FF_uses_sticky .or. &
1196	<	FF_uses_GB .or. FF_uses_RF
1197	<	end function FF_UsesDirectionalAtoms
1198	<
1199	<	function FF_RequiresPrepairCalc() result(doesit)
1200	<	logical :: doesit
1201	<	doesit = FF_uses_EAM
1202	<	end function FF_RequiresPrepairCalc
1203	<
1204	<	function FF_RequiresPostpairCalc() result(doesit)
1205	<	logical :: doesit
1206	<	doesit = FF_uses_RF
1207	<	end function FF_RequiresPostpairCalc
1208	<
1144	>	function FF_UsesDirectionalAtoms() result(doesit)
1145	>	logical :: doesit
1146	>	doesit = FF_uses_dipoles .or. FF_uses_sticky .or. &
1147	>	FF_uses_GB .or. FF_uses_RF
1148	>	end function FF_UsesDirectionalAtoms
1149	>
1150	>	function FF_RequiresPrepairCalc() result(doesit)
1151	>	logical :: doesit
1152	>	doesit = FF_uses_EAM
1153	>	end function FF_RequiresPrepairCalc
1154	>
1155	>	function FF_RequiresPostpairCalc() result(doesit)
1156	>	logical :: doesit
1157	>	doesit = FF_uses_RF
1158	>	end function FF_RequiresPostpairCalc
1159	>
1160		#ifdef PROFILE
1161	<	function getforcetime() result(totalforcetime)
1162	<	real(kind=dp) :: totalforcetime
1163	<	totalforcetime = forcetime
1164	<	end function getforcetime
1161	>	function getforcetime() result(totalforcetime)
1162	>	real(kind=dp) :: totalforcetime
1163	>	totalforcetime = forcetime
1164	>	end function getforcetime
1165		#endif
1166	+
1167	+	!! This cleans componets of force arrays belonging only to fortran
1168
1169	<	!! This cleans componets of force arrays belonging only to fortran
1170	<
1169	>	subroutine add_stress_tensor(dpair, fpair)
1170	>
1171	>	real( kind = dp ), dimension(3), intent(in) :: dpair, fpair
1172	>
1173	>	! because the d vector is the rj - ri vector, and
1174	>	! because fx, fy, fz are the force on atom i, we need a
1175	>	! negative sign here:
1176	>
1177	>	tau_Temp(1) = tau_Temp(1) - dpair(1) * fpair(1)
1178	>	tau_Temp(2) = tau_Temp(2) - dpair(1) * fpair(2)
1179	>	tau_Temp(3) = tau_Temp(3) - dpair(1) * fpair(3)
1180	>	tau_Temp(4) = tau_Temp(4) - dpair(2) * fpair(1)
1181	>	tau_Temp(5) = tau_Temp(5) - dpair(2) * fpair(2)
1182	>	tau_Temp(6) = tau_Temp(6) - dpair(2) * fpair(3)
1183	>	tau_Temp(7) = tau_Temp(7) - dpair(3) * fpair(1)
1184	>	tau_Temp(8) = tau_Temp(8) - dpair(3) * fpair(2)
1185	>	tau_Temp(9) = tau_Temp(9) - dpair(3) * fpair(3)
1186	>
1187	>	!write(*,'(6es12.3)')  fpair(1:3), tau_Temp(1), tau_Temp(5), tau_temp(9)
1188	>	virial_Temp = virial_Temp + &
1189	>	(tau_Temp(1) + tau_Temp(5) + tau_Temp(9))
1190	>
1191	>	end subroutine add_stress_tensor
1192	>
1193		end module do_Forces
1194	+

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