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!! @author Charles F. Vardeman II |
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!! @author Matthew Meineke |
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!! @version $Id: doForces.F90,v 1.43 2005-09-15 02:48:43 chuckv Exp $, $Date: 2005-09-15 02:48:43 $, $Name: not supported by cvs2svn $, $Revision: 1.43 $ |
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!! @version $Id: doForces.F90,v 1.48 2005-09-21 17:20:10 chrisfen Exp $, $Date: 2005-09-21 17:20:10 $, $Name: not supported by cvs2svn $, $Revision: 1.48 $ |
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module doForces |
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#define __FORTRAN90 |
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#include "UseTheForce/fSwitchingFunction.h" |
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#include "UseTheForce/fCutoffPolicy.h" |
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#include "UseTheForce/fCoulombicCorrection.h" |
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#include "UseTheForce/DarkSide/fInteractionMap.h" |
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#include "UseTheForce/DarkSide/fElectrostaticSummationMethod.h" |
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INTEGER, PARAMETER:: PREPAIR_LOOP = 1 |
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logical, save :: haveSaneForceField = .false. |
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logical, save :: haveInteractionHash = .false. |
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logical, save :: haveGtypeCutoffMap = .false. |
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logical, save :: haveDefaultCutoffs = .false. |
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logical, save :: haveRlist = .false. |
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logical, save :: FF_uses_DirectionalAtoms |
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logical, save :: FF_uses_Dipoles |
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logical, save :: FF_uses_GayBerne |
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logical, save :: FF_uses_EAM |
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logical, save :: FF_uses_RF |
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logical, save :: SIM_uses_DirectionalAtoms |
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logical, save :: SIM_uses_EAM |
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logical, save :: SIM_uses_RF |
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logical, save :: SIM_requires_postpair_calc |
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logical, save :: SIM_requires_prepair_calc |
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logical, save :: SIM_uses_PBC |
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integer, save :: corrMethod |
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integer, save :: electrostaticSummationMethod |
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public :: init_FF |
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public :: setDefaultCutoffs |
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type(gtypeCutoffs), dimension(:,:), allocatable :: gtypeCutoffMap |
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integer, save :: cutoffPolicy = TRADITIONAL_CUTOFF_POLICY |
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integer, save :: coulombicCorrection = NONE |
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real(kind=dp),save :: defaultRcut, defaultRsw, defaultRlist |
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real(kind=dp),save :: rcuti |
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contains |
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call getElementProperty(atypes, i, "is_Shape", i_is_Shape) |
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if (i_is_LJ) then |
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thisRcut = getSigma(i) * 2.5_dp |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_Elect) then |
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thisRcut = defaultRcut |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_Sticky) then |
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thisRcut = getStickyCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_StickyP) then |
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thisRcut = getStickyPowerCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_GB) then |
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thisRcut = getGayBerneCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_EAM) then |
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thisRcut = getEAMCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_Shape) then |
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thisRcut = getShapeCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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if (haveDefaultCutoffs) then |
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atypeMaxCutoff(i) = defaultRcut |
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else |
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if (i_is_LJ) then |
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thisRcut = getSigma(i) * 2.5_dp |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_Elect) then |
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thisRcut = defaultRcut |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_Sticky) then |
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thisRcut = getStickyCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_StickyP) then |
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thisRcut = getStickyPowerCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_GB) then |
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thisRcut = getGayBerneCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_EAM) then |
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thisRcut = getEAMCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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if (i_is_Shape) then |
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thisRcut = getShapeCut(i) |
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if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
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endif |
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endif |
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if (atypeMaxCutoff(i).gt.biggestAtypeCutoff) then |
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biggestAtypeCutoff = atypeMaxCutoff(i) |
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endif |
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endif |
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enddo |
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skin = defaultRlist - defaultRcut |
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gtypeCutoffMap(i,j)%rlistsq = (thisRcut + skin)**2 |
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! sanity check |
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|
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if (haveDefaultCutoffs) then |
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if (abs(gtypeCutoffMap(i,j)%rcut - defaultRcut).gt.0.0001) then |
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call handleError("createGtypeCutoffMap", "user-specified rCut does not match computed group Cutoff") |
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endif |
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endif |
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enddo |
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enddo |
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haveGtypeCutoffMap = .true. |
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end subroutine createGtypeCutoffMap |
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defaultRsw = defRsw |
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defaultRlist = defRlist |
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cutoffPolicy = cutPolicy |
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rcuti = 1.0_dp / defaultRcut |
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haveDefaultCutoffs = .true. |
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end subroutine setDefaultCutoffs |
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subroutine setCutoffPolicy(cutPolicy) |
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SIM_requires_postpair_calc = SimRequiresPostpairCalc() |
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SIM_requires_prepair_calc = SimRequiresPrepairCalc() |
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SIM_uses_PBC = SimUsesPBC() |
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SIM_uses_RF = SimUsesRF() |
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haveSIMvariables = .true. |
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end subroutine doReadyCheck |
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subroutine init_FF(use_RF, correctionMethod, dampingAlpha, thisStat) |
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subroutine init_FF(thisESM, thisStat) |
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logical, intent(in) :: use_RF |
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integer, intent(in) :: correctionMethod |
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real(kind=dp), intent(in) :: dampingAlpha |
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integer, intent(in) :: thisESM |
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integer, intent(out) :: thisStat |
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integer :: my_status, nMatches |
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integer, pointer :: MatchList(:) => null() |
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!! assume things are copacetic, unless they aren't |
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thisStat = 0 |
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!! Fortran's version of a cast: |
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FF_uses_RF = use_RF |
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electrostaticSummationMethod = thisESM |
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!! set the electrostatic correction method |
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select case(coulombicCorrection) |
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case(NONE) |
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corrMethod = 0 |
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case(UNDAMPED_WOLF) |
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corrMethod = 1 |
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case(WOLF) |
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corrMethod = 2 |
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case (REACTION_FIELD) |
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corrMethod = 3 |
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case default |
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call handleError("init_FF", "Unknown Coulombic Correction Method") |
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return |
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end select |
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!! init_FF is called *after* all of the atom types have been |
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!! defined in atype_module using the new_atype subroutine. |
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!! |
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haveSaneForceField = .true. |
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!! check to make sure the FF_uses_RF setting makes sense |
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!! check to make sure the reaction field setting makes sense |
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if (FF_uses_Dipoles) then |
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if (FF_uses_RF) then |
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if (electrostaticSummationMethod == REACTION_FIELD) then |
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dielect = getDielect() |
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call initialize_rf(dielect) |
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endif |
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else |
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if ((corrMethod == 3) .or. FF_uses_RF) then |
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if (electrostaticSummationMethod == REACTION_FIELD) then |
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write(default_error,*) 'Using Reaction Field with no dipoles? Huh?' |
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thisStat = -1 |
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haveSaneForceField = .false. |
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me_j = atid(j) |
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call get_interatomic_vector(q_group(:,i), & |
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q_group(:,j), d_grp, rgrpsq) |
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#endif |
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#endif |
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if (rgrpsq < gtypeCutoffMap(groupToGtype(i),groupToGtype(j))%rListsq) then |
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if (update_nlist) then |
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if (FF_RequiresPostpairCalc() .and. SIM_requires_postpair_calc) then |
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if ((FF_uses_RF .and. SIM_uses_RF) .or. (corrMethod == 3)) then |
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if (electrostaticSummationMethod == REACTION_FIELD) then |
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#ifdef IS_MPI |
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call scatter(rf_Row,rf,plan_atom_row_3d) |
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if ( iand(iHash, ELECTROSTATIC_PAIR).ne.0 ) then |
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call doElectrostaticPair(i, j, d, r, rijsq, sw, vpair, fpair, & |
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pot, eFrame, f, t, do_pot, corrMethod, rcuti) |
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pot, eFrame, f, t, do_pot) |
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if ((FF_uses_RF .and. SIM_uses_RF) .or. (corrMethod == 3)) then |
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if (electrostaticSummationMethod == REACTION_FIELD) then |
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! CHECK ME (RF needs to know about all electrostatic types) |
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call accumulate_rf(i, j, r, eFrame, sw) |
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function FF_RequiresPostpairCalc() result(doesit) |
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logical :: doesit |
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doesit = FF_uses_RF |
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if (corrMethod == 3) doesit = .true. |
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> |
if (electrostaticSummationMethod == REACTION_FIELD) doesit = .true. |
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end function FF_RequiresPostpairCalc |
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#ifdef PROFILE |