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!! |
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!! Copyright (c) 2005 The University of Notre Dame. All Rights Reserved. |
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!! |
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!! The University of Notre Dame grants you ("Licensee") a |
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!! non-exclusive, royalty free, license to use, modify and |
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!! redistribute this software in source and binary code form, provided |
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!! that the following conditions are met: |
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!! |
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!! 1. Acknowledgement of the program authors must be made in any |
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!! publication of scientific results based in part on use of the |
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!! program. An acceptable form of acknowledgement is citation of |
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!! the article in which the program was described (Matthew |
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!! A. Meineke, Charles F. Vardeman II, Teng Lin, Christopher |
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!! J. Fennell and J. Daniel Gezelter, "OOPSE: An Object-Oriented |
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!! Parallel Simulation Engine for Molecular Dynamics," |
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!! J. Comput. Chem. 26, pp. 252-271 (2005)) |
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!! |
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!! 2. Redistributions of source code must retain the above copyright |
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!! notice, this list of conditions and the following disclaimer. |
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!! |
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!! 3. Redistributions in binary form must reproduce the above copyright |
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!! notice, this list of conditions and the following disclaimer in the |
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!! documentation and/or other materials provided with the |
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!! distribution. |
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!! |
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!! This software is provided "AS IS," without a warranty of any |
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!! kind. All express or implied conditions, representations and |
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!! warranties, including any implied warranty of merchantability, |
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!! fitness for a particular purpose or non-infringement, are hereby |
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!! excluded. The University of Notre Dame and its licensors shall not |
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!! be liable for any damages suffered by licensee as a result of |
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!! using, modifying or distributing the software or its |
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!! derivatives. In no event will the University of Notre Dame or its |
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!! licensors be liable for any lost revenue, profit or data, or for |
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!! direct, indirect, special, consequential, incidental or punitive |
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!! damages, however caused and regardless of the theory of liability, |
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!! arising out of the use of or inability to use software, even if the |
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!! University of Notre Dame has been advised of the possibility of |
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!! such damages. |
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!! |
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|
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!! doForces.F90 |
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!! module doForces |
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!! Calculates Long Range forces. |
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|
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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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|
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|
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module doForces |
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use force_globals |
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use simulation |
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use definitions |
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use atype_module |
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use switcheroo |
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use neighborLists |
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use lj |
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use sticky |
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use electrostatic_module |
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use reaction_field_module |
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use gb_pair |
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use shapes |
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use vector_class |
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use eam |
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use status |
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#ifdef IS_MPI |
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use mpiSimulation |
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#endif |
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|
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implicit none |
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PRIVATE |
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|
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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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|
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|
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INTEGER, PARAMETER:: PREPAIR_LOOP = 1 |
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INTEGER, PARAMETER:: PAIR_LOOP = 2 |
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|
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logical, save :: haveNeighborList = .false. |
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logical, save :: haveSIMvariables = .false. |
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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 :: haveRlist = .false. |
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|
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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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|
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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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|
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integer, save :: corrMethod |
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|
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public :: init_FF |
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public :: setDefaultCutoffs |
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public :: do_force_loop |
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public :: createInteractionHash |
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public :: createGtypeCutoffMap |
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public :: getStickyCut |
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public :: getStickyPowerCut |
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public :: getGayBerneCut |
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public :: getEAMCut |
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public :: getShapeCut |
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|
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#ifdef PROFILE |
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public :: getforcetime |
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real, save :: forceTime = 0 |
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real :: forceTimeInitial, forceTimeFinal |
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integer :: nLoops |
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#endif |
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|
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!! Variables for cutoff mapping and interaction mapping |
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! Bit hash to determine pair-pair interactions. |
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integer, dimension(:,:), allocatable :: InteractionHash |
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real(kind=dp), dimension(:), allocatable :: atypeMaxCutoff |
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real(kind=dp), dimension(:), allocatable :: groupMaxCutoff |
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integer, dimension(:), allocatable :: groupToGtype |
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real(kind=dp), dimension(:), allocatable :: gtypeMaxCutoff |
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type ::gtypeCutoffs |
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real(kind=dp) :: rcut |
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real(kind=dp) :: rcutsq |
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real(kind=dp) :: rlistsq |
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end type gtypeCutoffs |
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type(gtypeCutoffs), dimension(:,:), allocatable :: gtypeCutoffMap |
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|
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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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|
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contains |
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|
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subroutine createInteractionHash(status) |
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integer :: nAtypes |
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integer, intent(out) :: status |
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integer :: i |
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integer :: j |
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integer :: iHash |
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!! Test Types |
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logical :: i_is_LJ |
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logical :: i_is_Elect |
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logical :: i_is_Sticky |
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logical :: i_is_StickyP |
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logical :: i_is_GB |
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logical :: i_is_EAM |
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logical :: i_is_Shape |
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logical :: j_is_LJ |
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logical :: j_is_Elect |
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logical :: j_is_Sticky |
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logical :: j_is_StickyP |
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logical :: j_is_GB |
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logical :: j_is_EAM |
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logical :: j_is_Shape |
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real(kind=dp) :: myRcut |
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|
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status = 0 |
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|
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if (.not. associated(atypes)) then |
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call handleError("atype", "atypes was not present before call of createInteractionHash!") |
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status = -1 |
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return |
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endif |
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|
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nAtypes = getSize(atypes) |
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|
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if (nAtypes == 0) then |
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status = -1 |
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return |
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end if |
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|
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if (.not. allocated(InteractionHash)) then |
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allocate(InteractionHash(nAtypes,nAtypes)) |
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endif |
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|
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if (.not. allocated(atypeMaxCutoff)) then |
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allocate(atypeMaxCutoff(nAtypes)) |
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endif |
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|
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do i = 1, nAtypes |
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call getElementProperty(atypes, i, "is_LennardJones", i_is_LJ) |
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call getElementProperty(atypes, i, "is_Electrostatic", i_is_Elect) |
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call getElementProperty(atypes, i, "is_Sticky", i_is_Sticky) |
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call getElementProperty(atypes, i, "is_StickyPower", i_is_StickyP) |
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call getElementProperty(atypes, i, "is_GayBerne", i_is_GB) |
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call getElementProperty(atypes, i, "is_EAM", i_is_EAM) |
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call getElementProperty(atypes, i, "is_Shape", i_is_Shape) |
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|
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do j = i, nAtypes |
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|
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iHash = 0 |
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myRcut = 0.0_dp |
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|
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call getElementProperty(atypes, j, "is_LennardJones", j_is_LJ) |
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call getElementProperty(atypes, j, "is_Electrostatic", j_is_Elect) |
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call getElementProperty(atypes, j, "is_Sticky", j_is_Sticky) |
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call getElementProperty(atypes, j, "is_StickyPower", j_is_StickyP) |
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call getElementProperty(atypes, j, "is_GayBerne", j_is_GB) |
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call getElementProperty(atypes, j, "is_EAM", j_is_EAM) |
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call getElementProperty(atypes, j, "is_Shape", j_is_Shape) |
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|
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if (i_is_LJ .and. j_is_LJ) then |
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iHash = ior(iHash, LJ_PAIR) |
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endif |
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|
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if (i_is_Elect .and. j_is_Elect) then |
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iHash = ior(iHash, ELECTROSTATIC_PAIR) |
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endif |
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|
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if (i_is_Sticky .and. j_is_Sticky) then |
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iHash = ior(iHash, STICKY_PAIR) |
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endif |
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|
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if (i_is_StickyP .and. j_is_StickyP) then |
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iHash = ior(iHash, STICKYPOWER_PAIR) |
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endif |
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|
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if (i_is_EAM .and. j_is_EAM) then |
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iHash = ior(iHash, EAM_PAIR) |
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endif |
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|
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if (i_is_GB .and. j_is_GB) iHash = ior(iHash, GAYBERNE_PAIR) |
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if (i_is_GB .and. j_is_LJ) iHash = ior(iHash, GAYBERNE_LJ) |
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if (i_is_LJ .and. j_is_GB) iHash = ior(iHash, GAYBERNE_LJ) |
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|
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if (i_is_Shape .and. j_is_Shape) iHash = ior(iHash, SHAPE_PAIR) |
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if (i_is_Shape .and. j_is_LJ) iHash = ior(iHash, SHAPE_LJ) |
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if (i_is_LJ .and. j_is_Shape) iHash = ior(iHash, SHAPE_LJ) |
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|
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|
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InteractionHash(i,j) = iHash |
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InteractionHash(j,i) = iHash |
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|
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end do |
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|
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end do |
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|
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haveInteractionHash = .true. |
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end subroutine createInteractionHash |
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|
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subroutine createGtypeCutoffMap(stat) |
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|
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integer, intent(out), optional :: stat |
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logical :: i_is_LJ |
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logical :: i_is_Elect |
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logical :: i_is_Sticky |
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logical :: i_is_StickyP |
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logical :: i_is_GB |
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logical :: i_is_EAM |
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logical :: i_is_Shape |
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logical :: GtypeFound |
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|
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integer :: myStatus, nAtypes, i, j, istart, iend, jstart, jend |
265 |
integer :: n_in_i, me_i, ia, g, atom1, nGroupTypes |
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integer :: nGroupsInRow |
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real(kind=dp):: thisSigma, bigSigma, thisRcut, tol, skin |
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real(kind=dp) :: biggestAtypeCutoff |
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|
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stat = 0 |
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if (.not. haveInteractionHash) then |
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call createInteractionHash(myStatus) |
273 |
if (myStatus .ne. 0) then |
274 |
write(default_error, *) 'createInteractionHash failed in doForces!' |
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stat = -1 |
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return |
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endif |
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endif |
279 |
#ifdef IS_MPI |
280 |
nGroupsInRow = getNgroupsInRow(plan_group_row) |
281 |
#endif |
282 |
nAtypes = getSize(atypes) |
283 |
! Set all of the initial cutoffs to zero. |
284 |
atypeMaxCutoff = 0.0_dp |
285 |
do i = 1, nAtypes |
286 |
if (SimHasAtype(i)) then |
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call getElementProperty(atypes, i, "is_LennardJones", i_is_LJ) |
288 |
call getElementProperty(atypes, i, "is_Electrostatic", i_is_Elect) |
289 |
call getElementProperty(atypes, i, "is_Sticky", i_is_Sticky) |
290 |
call getElementProperty(atypes, i, "is_StickyPower", i_is_StickyP) |
291 |
call getElementProperty(atypes, i, "is_GayBerne", i_is_GB) |
292 |
call getElementProperty(atypes, i, "is_EAM", i_is_EAM) |
293 |
call getElementProperty(atypes, i, "is_Shape", i_is_Shape) |
294 |
|
295 |
|
296 |
if (i_is_LJ) then |
297 |
thisRcut = getSigma(i) * 2.5_dp |
298 |
if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
299 |
endif |
300 |
if (i_is_Elect) then |
301 |
thisRcut = defaultRcut |
302 |
if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
303 |
endif |
304 |
if (i_is_Sticky) then |
305 |
thisRcut = getStickyCut(i) |
306 |
if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
307 |
endif |
308 |
if (i_is_StickyP) then |
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thisRcut = getStickyPowerCut(i) |
310 |
if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
311 |
endif |
312 |
if (i_is_GB) then |
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thisRcut = getGayBerneCut(i) |
314 |
if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
315 |
endif |
316 |
if (i_is_EAM) then |
317 |
thisRcut = getEAMCut(i) |
318 |
if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
319 |
endif |
320 |
if (i_is_Shape) then |
321 |
thisRcut = getShapeCut(i) |
322 |
if (thisRCut .gt. atypeMaxCutoff(i)) atypeMaxCutoff(i) = thisRCut |
323 |
endif |
324 |
|
325 |
if (atypeMaxCutoff(i).gt.biggestAtypeCutoff) then |
326 |
biggestAtypeCutoff = atypeMaxCutoff(i) |
327 |
endif |
328 |
endif |
329 |
enddo |
330 |
|
331 |
nGroupTypes = 0 |
332 |
|
333 |
istart = 1 |
334 |
#ifdef IS_MPI |
335 |
iend = nGroupsInRow |
336 |
#else |
337 |
iend = nGroups |
338 |
#endif |
339 |
|
340 |
!! allocate the groupToGtype and gtypeMaxCutoff here. |
341 |
if(.not.allocated(groupToGtype)) then |
342 |
allocate(groupToGtype(iend)) |
343 |
allocate(groupMaxCutoff(iend)) |
344 |
allocate(gtypeMaxCutoff(iend)) |
345 |
groupMaxCutoff = 0.0_dp |
346 |
gtypeMaxCutoff = 0.0_dp |
347 |
endif |
348 |
!! first we do a single loop over the cutoff groups to find the |
349 |
!! largest cutoff for any atypes present in this group. We also |
350 |
!! create gtypes at this point. |
351 |
|
352 |
tol = 1.0d-6 |
353 |
|
354 |
do i = istart, iend |
355 |
n_in_i = groupStartRow(i+1) - groupStartRow(i) |
356 |
groupMaxCutoff(i) = 0.0_dp |
357 |
do ia = groupStartRow(i), groupStartRow(i+1)-1 |
358 |
atom1 = groupListRow(ia) |
359 |
#ifdef IS_MPI |
360 |
me_i = atid_row(atom1) |
361 |
#else |
362 |
me_i = atid(atom1) |
363 |
#endif |
364 |
if (atypeMaxCutoff(me_i).gt.groupMaxCutoff(i)) then |
365 |
groupMaxCutoff(i)=atypeMaxCutoff(me_i) |
366 |
endif |
367 |
enddo |
368 |
|
369 |
if (nGroupTypes.eq.0) then |
370 |
nGroupTypes = nGroupTypes + 1 |
371 |
gtypeMaxCutoff(nGroupTypes) = groupMaxCutoff(i) |
372 |
groupToGtype(i) = nGroupTypes |
373 |
else |
374 |
GtypeFound = .false. |
375 |
do g = 1, nGroupTypes |
376 |
if ( abs(groupMaxCutoff(i) - gtypeMaxCutoff(g)).lt.tol) then |
377 |
groupToGtype(i) = g |
378 |
GtypeFound = .true. |
379 |
endif |
380 |
enddo |
381 |
if (.not.GtypeFound) then |
382 |
nGroupTypes = nGroupTypes + 1 |
383 |
gtypeMaxCutoff(nGroupTypes) = groupMaxCutoff(i) |
384 |
groupToGtype(i) = nGroupTypes |
385 |
endif |
386 |
endif |
387 |
enddo |
388 |
|
389 |
!! allocate the gtypeCutoffMap here. |
390 |
allocate(gtypeCutoffMap(nGroupTypes,nGroupTypes)) |
391 |
!! then we do a double loop over all the group TYPES to find the cutoff |
392 |
!! map between groups of two types |
393 |
|
394 |
do i = 1, nGroupTypes |
395 |
do j = 1, nGroupTypes |
396 |
|
397 |
select case(cutoffPolicy) |
398 |
case(TRADITIONAL_CUTOFF_POLICY) |
399 |
thisRcut = maxval(gtypeMaxCutoff) |
400 |
case(MIX_CUTOFF_POLICY) |
401 |
thisRcut = 0.5_dp * (gtypeMaxCutoff(i) + gtypeMaxCutoff(j)) |
402 |
case(MAX_CUTOFF_POLICY) |
403 |
thisRcut = max(gtypeMaxCutoff(i), gtypeMaxCutoff(j)) |
404 |
case default |
405 |
call handleError("createGtypeCutoffMap", "Unknown Cutoff Policy") |
406 |
return |
407 |
end select |
408 |
gtypeCutoffMap(i,j)%rcut = thisRcut |
409 |
gtypeCutoffMap(i,j)%rcutsq = thisRcut*thisRcut |
410 |
skin = defaultRlist - defaultRcut |
411 |
gtypeCutoffMap(i,j)%rlistsq = (thisRcut + skin)**2 |
412 |
|
413 |
enddo |
414 |
enddo |
415 |
|
416 |
haveGtypeCutoffMap = .true. |
417 |
end subroutine createGtypeCutoffMap |
418 |
|
419 |
subroutine setDefaultCutoffs(defRcut, defRsw, defRlist, cutPolicy) |
420 |
real(kind=dp),intent(in) :: defRcut, defRsw, defRlist |
421 |
integer, intent(in) :: cutPolicy |
422 |
|
423 |
defaultRcut = defRcut |
424 |
defaultRsw = defRsw |
425 |
defaultRlist = defRlist |
426 |
cutoffPolicy = cutPolicy |
427 |
rcuti = 1.0_dp / defaultRcut |
428 |
end subroutine setDefaultCutoffs |
429 |
|
430 |
subroutine setCutoffPolicy(cutPolicy) |
431 |
|
432 |
integer, intent(in) :: cutPolicy |
433 |
cutoffPolicy = cutPolicy |
434 |
call createGtypeCutoffMap() |
435 |
end subroutine setCutoffPolicy |
436 |
|
437 |
|
438 |
subroutine setSimVariables() |
439 |
SIM_uses_DirectionalAtoms = SimUsesDirectionalAtoms() |
440 |
SIM_uses_EAM = SimUsesEAM() |
441 |
SIM_requires_postpair_calc = SimRequiresPostpairCalc() |
442 |
SIM_requires_prepair_calc = SimRequiresPrepairCalc() |
443 |
SIM_uses_PBC = SimUsesPBC() |
444 |
SIM_uses_RF = SimUsesRF() |
445 |
|
446 |
haveSIMvariables = .true. |
447 |
|
448 |
return |
449 |
end subroutine setSimVariables |
450 |
|
451 |
subroutine doReadyCheck(error) |
452 |
integer, intent(out) :: error |
453 |
|
454 |
integer :: myStatus |
455 |
|
456 |
error = 0 |
457 |
|
458 |
if (.not. haveInteractionHash) then |
459 |
myStatus = 0 |
460 |
call createInteractionHash(myStatus) |
461 |
if (myStatus .ne. 0) then |
462 |
write(default_error, *) 'createInteractionHash failed in doForces!' |
463 |
error = -1 |
464 |
return |
465 |
endif |
466 |
endif |
467 |
|
468 |
if (.not. haveGtypeCutoffMap) then |
469 |
myStatus = 0 |
470 |
call createGtypeCutoffMap(myStatus) |
471 |
if (myStatus .ne. 0) then |
472 |
write(default_error, *) 'createGtypeCutoffMap failed in doForces!' |
473 |
error = -1 |
474 |
return |
475 |
endif |
476 |
endif |
477 |
|
478 |
if (.not. haveSIMvariables) then |
479 |
call setSimVariables() |
480 |
endif |
481 |
|
482 |
! if (.not. haveRlist) then |
483 |
! write(default_error, *) 'rList has not been set in doForces!' |
484 |
! error = -1 |
485 |
! return |
486 |
! endif |
487 |
|
488 |
if (.not. haveNeighborList) then |
489 |
write(default_error, *) 'neighbor list has not been initialized in doForces!' |
490 |
error = -1 |
491 |
return |
492 |
end if |
493 |
|
494 |
if (.not. haveSaneForceField) then |
495 |
write(default_error, *) 'Force Field is not sane in doForces!' |
496 |
error = -1 |
497 |
return |
498 |
end if |
499 |
|
500 |
#ifdef IS_MPI |
501 |
if (.not. isMPISimSet()) then |
502 |
write(default_error,*) "ERROR: mpiSimulation has not been initialized!" |
503 |
error = -1 |
504 |
return |
505 |
endif |
506 |
#endif |
507 |
return |
508 |
end subroutine doReadyCheck |
509 |
|
510 |
|
511 |
subroutine init_FF(use_RF, correctionMethod, dampingAlpha, thisStat) |
512 |
|
513 |
logical, intent(in) :: use_RF |
514 |
integer, intent(in) :: correctionMethod |
515 |
real(kind=dp), intent(in) :: dampingAlpha |
516 |
integer, intent(out) :: thisStat |
517 |
integer :: my_status, nMatches |
518 |
integer, pointer :: MatchList(:) => null() |
519 |
real(kind=dp) :: rcut, rrf, rt, dielect |
520 |
|
521 |
!! assume things are copacetic, unless they aren't |
522 |
thisStat = 0 |
523 |
|
524 |
!! Fortran's version of a cast: |
525 |
FF_uses_RF = use_RF |
526 |
|
527 |
!! set the electrostatic correction method |
528 |
select case(coulombicCorrection) |
529 |
case(NONE) |
530 |
corrMethod = 0 |
531 |
case(UNDAMPED_WOLF) |
532 |
corrMethod = 1 |
533 |
case(WOLF) |
534 |
corrMethod = 2 |
535 |
case (REACTION_FIELD) |
536 |
corrMethod = 3 |
537 |
case default |
538 |
call handleError("init_FF", "Unknown Coulombic Correction Method") |
539 |
return |
540 |
end select |
541 |
|
542 |
!! init_FF is called *after* all of the atom types have been |
543 |
!! defined in atype_module using the new_atype subroutine. |
544 |
!! |
545 |
!! this will scan through the known atypes and figure out what |
546 |
!! interactions are used by the force field. |
547 |
|
548 |
FF_uses_DirectionalAtoms = .false. |
549 |
FF_uses_Dipoles = .false. |
550 |
FF_uses_GayBerne = .false. |
551 |
FF_uses_EAM = .false. |
552 |
|
553 |
call getMatchingElementList(atypes, "is_Directional", .true., & |
554 |
nMatches, MatchList) |
555 |
if (nMatches .gt. 0) FF_uses_DirectionalAtoms = .true. |
556 |
|
557 |
call getMatchingElementList(atypes, "is_Dipole", .true., & |
558 |
nMatches, MatchList) |
559 |
if (nMatches .gt. 0) FF_uses_Dipoles = .true. |
560 |
|
561 |
call getMatchingElementList(atypes, "is_GayBerne", .true., & |
562 |
nMatches, MatchList) |
563 |
if (nMatches .gt. 0) FF_uses_GayBerne = .true. |
564 |
|
565 |
call getMatchingElementList(atypes, "is_EAM", .true., nMatches, MatchList) |
566 |
if (nMatches .gt. 0) FF_uses_EAM = .true. |
567 |
|
568 |
|
569 |
haveSaneForceField = .true. |
570 |
|
571 |
!! check to make sure the FF_uses_RF setting makes sense |
572 |
|
573 |
if (FF_uses_Dipoles) then |
574 |
if (FF_uses_RF) then |
575 |
dielect = getDielect() |
576 |
call initialize_rf(dielect) |
577 |
endif |
578 |
else |
579 |
if ((corrMethod == 3) .or. FF_uses_RF) then |
580 |
write(default_error,*) 'Using Reaction Field with no dipoles? Huh?' |
581 |
thisStat = -1 |
582 |
haveSaneForceField = .false. |
583 |
return |
584 |
endif |
585 |
endif |
586 |
|
587 |
if (FF_uses_EAM) then |
588 |
call init_EAM_FF(my_status) |
589 |
if (my_status /= 0) then |
590 |
write(default_error, *) "init_EAM_FF returned a bad status" |
591 |
thisStat = -1 |
592 |
haveSaneForceField = .false. |
593 |
return |
594 |
end if |
595 |
endif |
596 |
|
597 |
if (FF_uses_GayBerne) then |
598 |
call check_gb_pair_FF(my_status) |
599 |
if (my_status .ne. 0) then |
600 |
thisStat = -1 |
601 |
haveSaneForceField = .false. |
602 |
return |
603 |
endif |
604 |
endif |
605 |
|
606 |
if (.not. haveNeighborList) then |
607 |
!! Create neighbor lists |
608 |
call expandNeighborList(nLocal, my_status) |
609 |
if (my_Status /= 0) then |
610 |
write(default_error,*) "SimSetup: ExpandNeighborList returned error." |
611 |
thisStat = -1 |
612 |
return |
613 |
endif |
614 |
haveNeighborList = .true. |
615 |
endif |
616 |
|
617 |
end subroutine init_FF |
618 |
|
619 |
|
620 |
!! Does force loop over i,j pairs. Calls do_pair to calculates forces. |
621 |
!-------------------------------------------------------------> |
622 |
subroutine do_force_loop(q, q_group, A, eFrame, f, t, tau, pot, & |
623 |
do_pot_c, do_stress_c, error) |
624 |
!! Position array provided by C, dimensioned by getNlocal |
625 |
real ( kind = dp ), dimension(3, nLocal) :: q |
626 |
!! molecular center-of-mass position array |
627 |
real ( kind = dp ), dimension(3, nGroups) :: q_group |
628 |
!! Rotation Matrix for each long range particle in simulation. |
629 |
real( kind = dp), dimension(9, nLocal) :: A |
630 |
!! Unit vectors for dipoles (lab frame) |
631 |
real( kind = dp ), dimension(9,nLocal) :: eFrame |
632 |
!! Force array provided by C, dimensioned by getNlocal |
633 |
real ( kind = dp ), dimension(3,nLocal) :: f |
634 |
!! Torsion array provided by C, dimensioned by getNlocal |
635 |
real( kind = dp ), dimension(3,nLocal) :: t |
636 |
|
637 |
!! Stress Tensor |
638 |
real( kind = dp), dimension(9) :: tau |
639 |
real ( kind = dp ) :: pot |
640 |
logical ( kind = 2) :: do_pot_c, do_stress_c |
641 |
logical :: do_pot |
642 |
logical :: do_stress |
643 |
logical :: in_switching_region |
644 |
#ifdef IS_MPI |
645 |
real( kind = DP ) :: pot_local |
646 |
integer :: nAtomsInRow |
647 |
integer :: nAtomsInCol |
648 |
integer :: nprocs |
649 |
integer :: nGroupsInRow |
650 |
integer :: nGroupsInCol |
651 |
#endif |
652 |
integer :: natoms |
653 |
logical :: update_nlist |
654 |
integer :: i, j, jstart, jend, jnab |
655 |
integer :: istart, iend |
656 |
integer :: ia, jb, atom1, atom2 |
657 |
integer :: nlist |
658 |
real( kind = DP ) :: ratmsq, rgrpsq, rgrp, vpair, vij |
659 |
real( kind = DP ) :: sw, dswdr, swderiv, mf |
660 |
real(kind=dp),dimension(3) :: d_atm, d_grp, fpair, fij |
661 |
real(kind=dp) :: rfpot, mu_i, virial |
662 |
integer :: me_i, me_j, n_in_i, n_in_j |
663 |
logical :: is_dp_i |
664 |
integer :: neighborListSize |
665 |
integer :: listerror, error |
666 |
integer :: localError |
667 |
integer :: propPack_i, propPack_j |
668 |
integer :: loopStart, loopEnd, loop |
669 |
integer :: iHash |
670 |
real(kind=dp) :: listSkin = 1.0 |
671 |
|
672 |
!! initialize local variables |
673 |
|
674 |
#ifdef IS_MPI |
675 |
pot_local = 0.0_dp |
676 |
nAtomsInRow = getNatomsInRow(plan_atom_row) |
677 |
nAtomsInCol = getNatomsInCol(plan_atom_col) |
678 |
nGroupsInRow = getNgroupsInRow(plan_group_row) |
679 |
nGroupsInCol = getNgroupsInCol(plan_group_col) |
680 |
#else |
681 |
natoms = nlocal |
682 |
#endif |
683 |
|
684 |
call doReadyCheck(localError) |
685 |
if ( localError .ne. 0 ) then |
686 |
call handleError("do_force_loop", "Not Initialized") |
687 |
error = -1 |
688 |
return |
689 |
end if |
690 |
call zero_work_arrays() |
691 |
|
692 |
do_pot = do_pot_c |
693 |
do_stress = do_stress_c |
694 |
|
695 |
! Gather all information needed by all force loops: |
696 |
|
697 |
#ifdef IS_MPI |
698 |
|
699 |
call gather(q, q_Row, plan_atom_row_3d) |
700 |
call gather(q, q_Col, plan_atom_col_3d) |
701 |
|
702 |
call gather(q_group, q_group_Row, plan_group_row_3d) |
703 |
call gather(q_group, q_group_Col, plan_group_col_3d) |
704 |
|
705 |
if (FF_UsesDirectionalAtoms() .and. SIM_uses_DirectionalAtoms) then |
706 |
call gather(eFrame, eFrame_Row, plan_atom_row_rotation) |
707 |
call gather(eFrame, eFrame_Col, plan_atom_col_rotation) |
708 |
|
709 |
call gather(A, A_Row, plan_atom_row_rotation) |
710 |
call gather(A, A_Col, plan_atom_col_rotation) |
711 |
endif |
712 |
|
713 |
#endif |
714 |
|
715 |
!! Begin force loop timing: |
716 |
#ifdef PROFILE |
717 |
call cpu_time(forceTimeInitial) |
718 |
nloops = nloops + 1 |
719 |
#endif |
720 |
|
721 |
loopEnd = PAIR_LOOP |
722 |
if (FF_RequiresPrepairCalc() .and. SIM_requires_prepair_calc) then |
723 |
loopStart = PREPAIR_LOOP |
724 |
else |
725 |
loopStart = PAIR_LOOP |
726 |
endif |
727 |
|
728 |
do loop = loopStart, loopEnd |
729 |
|
730 |
! See if we need to update neighbor lists |
731 |
! (but only on the first time through): |
732 |
if (loop .eq. loopStart) then |
733 |
#ifdef IS_MPI |
734 |
call checkNeighborList(nGroupsInRow, q_group_row, listSkin, & |
735 |
update_nlist) |
736 |
#else |
737 |
call checkNeighborList(nGroups, q_group, listSkin, & |
738 |
update_nlist) |
739 |
#endif |
740 |
endif |
741 |
|
742 |
if (update_nlist) then |
743 |
!! save current configuration and construct neighbor list |
744 |
#ifdef IS_MPI |
745 |
call saveNeighborList(nGroupsInRow, q_group_row) |
746 |
#else |
747 |
call saveNeighborList(nGroups, q_group) |
748 |
#endif |
749 |
neighborListSize = size(list) |
750 |
nlist = 0 |
751 |
endif |
752 |
|
753 |
istart = 1 |
754 |
#ifdef IS_MPI |
755 |
iend = nGroupsInRow |
756 |
#else |
757 |
iend = nGroups - 1 |
758 |
#endif |
759 |
outer: do i = istart, iend |
760 |
|
761 |
if (update_nlist) point(i) = nlist + 1 |
762 |
|
763 |
n_in_i = groupStartRow(i+1) - groupStartRow(i) |
764 |
|
765 |
if (update_nlist) then |
766 |
#ifdef IS_MPI |
767 |
jstart = 1 |
768 |
jend = nGroupsInCol |
769 |
#else |
770 |
jstart = i+1 |
771 |
jend = nGroups |
772 |
#endif |
773 |
else |
774 |
jstart = point(i) |
775 |
jend = point(i+1) - 1 |
776 |
! make sure group i has neighbors |
777 |
if (jstart .gt. jend) cycle outer |
778 |
endif |
779 |
|
780 |
do jnab = jstart, jend |
781 |
if (update_nlist) then |
782 |
j = jnab |
783 |
else |
784 |
j = list(jnab) |
785 |
endif |
786 |
|
787 |
#ifdef IS_MPI |
788 |
me_j = atid_col(j) |
789 |
call get_interatomic_vector(q_group_Row(:,i), & |
790 |
q_group_Col(:,j), d_grp, rgrpsq) |
791 |
#else |
792 |
me_j = atid(j) |
793 |
call get_interatomic_vector(q_group(:,i), & |
794 |
q_group(:,j), d_grp, rgrpsq) |
795 |
#endif |
796 |
|
797 |
if (rgrpsq < gtypeCutoffMap(groupToGtype(i),groupToGtype(j))%rListsq) then |
798 |
if (update_nlist) then |
799 |
nlist = nlist + 1 |
800 |
|
801 |
if (nlist > neighborListSize) then |
802 |
#ifdef IS_MPI |
803 |
call expandNeighborList(nGroupsInRow, listerror) |
804 |
#else |
805 |
call expandNeighborList(nGroups, listerror) |
806 |
#endif |
807 |
if (listerror /= 0) then |
808 |
error = -1 |
809 |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size and max allocations exceeded." |
810 |
return |
811 |
end if |
812 |
neighborListSize = size(list) |
813 |
endif |
814 |
|
815 |
list(nlist) = j |
816 |
endif |
817 |
|
818 |
if (loop .eq. PAIR_LOOP) then |
819 |
vij = 0.0d0 |
820 |
fij(1:3) = 0.0d0 |
821 |
endif |
822 |
|
823 |
call get_switch(rgrpsq, sw, dswdr, rgrp, group_switch, & |
824 |
in_switching_region) |
825 |
|
826 |
n_in_j = groupStartCol(j+1) - groupStartCol(j) |
827 |
|
828 |
do ia = groupStartRow(i), groupStartRow(i+1)-1 |
829 |
|
830 |
atom1 = groupListRow(ia) |
831 |
|
832 |
inner: do jb = groupStartCol(j), groupStartCol(j+1)-1 |
833 |
|
834 |
atom2 = groupListCol(jb) |
835 |
|
836 |
if (skipThisPair(atom1, atom2)) cycle inner |
837 |
|
838 |
if ((n_in_i .eq. 1).and.(n_in_j .eq. 1)) then |
839 |
d_atm(1:3) = d_grp(1:3) |
840 |
ratmsq = rgrpsq |
841 |
else |
842 |
#ifdef IS_MPI |
843 |
call get_interatomic_vector(q_Row(:,atom1), & |
844 |
q_Col(:,atom2), d_atm, ratmsq) |
845 |
#else |
846 |
call get_interatomic_vector(q(:,atom1), & |
847 |
q(:,atom2), d_atm, ratmsq) |
848 |
#endif |
849 |
endif |
850 |
|
851 |
if (loop .eq. PREPAIR_LOOP) then |
852 |
#ifdef IS_MPI |
853 |
call do_prepair(atom1, atom2, ratmsq, d_atm, sw, & |
854 |
rgrpsq, d_grp, do_pot, do_stress, & |
855 |
eFrame, A, f, t, pot_local) |
856 |
#else |
857 |
call do_prepair(atom1, atom2, ratmsq, d_atm, sw, & |
858 |
rgrpsq, d_grp, do_pot, do_stress, & |
859 |
eFrame, A, f, t, pot) |
860 |
#endif |
861 |
else |
862 |
#ifdef IS_MPI |
863 |
call do_pair(atom1, atom2, ratmsq, d_atm, sw, & |
864 |
do_pot, & |
865 |
eFrame, A, f, t, pot_local, vpair, fpair) |
866 |
#else |
867 |
call do_pair(atom1, atom2, ratmsq, d_atm, sw, & |
868 |
do_pot, & |
869 |
eFrame, A, f, t, pot, vpair, fpair) |
870 |
#endif |
871 |
|
872 |
vij = vij + vpair |
873 |
fij(1:3) = fij(1:3) + fpair(1:3) |
874 |
endif |
875 |
enddo inner |
876 |
enddo |
877 |
|
878 |
if (loop .eq. PAIR_LOOP) then |
879 |
if (in_switching_region) then |
880 |
swderiv = vij*dswdr/rgrp |
881 |
fij(1) = fij(1) + swderiv*d_grp(1) |
882 |
fij(2) = fij(2) + swderiv*d_grp(2) |
883 |
fij(3) = fij(3) + swderiv*d_grp(3) |
884 |
|
885 |
do ia=groupStartRow(i), groupStartRow(i+1)-1 |
886 |
atom1=groupListRow(ia) |
887 |
mf = mfactRow(atom1) |
888 |
#ifdef IS_MPI |
889 |
f_Row(1,atom1) = f_Row(1,atom1) + swderiv*d_grp(1)*mf |
890 |
f_Row(2,atom1) = f_Row(2,atom1) + swderiv*d_grp(2)*mf |
891 |
f_Row(3,atom1) = f_Row(3,atom1) + swderiv*d_grp(3)*mf |
892 |
#else |
893 |
f(1,atom1) = f(1,atom1) + swderiv*d_grp(1)*mf |
894 |
f(2,atom1) = f(2,atom1) + swderiv*d_grp(2)*mf |
895 |
f(3,atom1) = f(3,atom1) + swderiv*d_grp(3)*mf |
896 |
#endif |
897 |
enddo |
898 |
|
899 |
do jb=groupStartCol(j), groupStartCol(j+1)-1 |
900 |
atom2=groupListCol(jb) |
901 |
mf = mfactCol(atom2) |
902 |
#ifdef IS_MPI |
903 |
f_Col(1,atom2) = f_Col(1,atom2) - swderiv*d_grp(1)*mf |
904 |
f_Col(2,atom2) = f_Col(2,atom2) - swderiv*d_grp(2)*mf |
905 |
f_Col(3,atom2) = f_Col(3,atom2) - swderiv*d_grp(3)*mf |
906 |
#else |
907 |
f(1,atom2) = f(1,atom2) - swderiv*d_grp(1)*mf |
908 |
f(2,atom2) = f(2,atom2) - swderiv*d_grp(2)*mf |
909 |
f(3,atom2) = f(3,atom2) - swderiv*d_grp(3)*mf |
910 |
#endif |
911 |
enddo |
912 |
endif |
913 |
|
914 |
if (do_stress) call add_stress_tensor(d_grp, fij) |
915 |
endif |
916 |
end if |
917 |
enddo |
918 |
enddo outer |
919 |
|
920 |
if (update_nlist) then |
921 |
#ifdef IS_MPI |
922 |
point(nGroupsInRow + 1) = nlist + 1 |
923 |
#else |
924 |
point(nGroups) = nlist + 1 |
925 |
#endif |
926 |
if (loop .eq. PREPAIR_LOOP) then |
927 |
! we just did the neighbor list update on the first |
928 |
! pass, so we don't need to do it |
929 |
! again on the second pass |
930 |
update_nlist = .false. |
931 |
endif |
932 |
endif |
933 |
|
934 |
if (loop .eq. PREPAIR_LOOP) then |
935 |
call do_preforce(nlocal, pot) |
936 |
endif |
937 |
|
938 |
enddo |
939 |
|
940 |
!! Do timing |
941 |
#ifdef PROFILE |
942 |
call cpu_time(forceTimeFinal) |
943 |
forceTime = forceTime + forceTimeFinal - forceTimeInitial |
944 |
#endif |
945 |
|
946 |
#ifdef IS_MPI |
947 |
!!distribute forces |
948 |
|
949 |
f_temp = 0.0_dp |
950 |
call scatter(f_Row,f_temp,plan_atom_row_3d) |
951 |
do i = 1,nlocal |
952 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
953 |
end do |
954 |
|
955 |
f_temp = 0.0_dp |
956 |
call scatter(f_Col,f_temp,plan_atom_col_3d) |
957 |
do i = 1,nlocal |
958 |
f(1:3,i) = f(1:3,i) + f_temp(1:3,i) |
959 |
end do |
960 |
|
961 |
if (FF_UsesDirectionalAtoms() .and. SIM_uses_DirectionalAtoms) then |
962 |
t_temp = 0.0_dp |
963 |
call scatter(t_Row,t_temp,plan_atom_row_3d) |
964 |
do i = 1,nlocal |
965 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
966 |
end do |
967 |
t_temp = 0.0_dp |
968 |
call scatter(t_Col,t_temp,plan_atom_col_3d) |
969 |
|
970 |
do i = 1,nlocal |
971 |
t(1:3,i) = t(1:3,i) + t_temp(1:3,i) |
972 |
end do |
973 |
endif |
974 |
|
975 |
if (do_pot) then |
976 |
! scatter/gather pot_row into the members of my column |
977 |
call scatter(pot_Row, pot_Temp, plan_atom_row) |
978 |
|
979 |
! scatter/gather pot_local into all other procs |
980 |
! add resultant to get total pot |
981 |
do i = 1, nlocal |
982 |
pot_local = pot_local + pot_Temp(i) |
983 |
enddo |
984 |
|
985 |
pot_Temp = 0.0_DP |
986 |
|
987 |
call scatter(pot_Col, pot_Temp, plan_atom_col) |
988 |
do i = 1, nlocal |
989 |
pot_local = pot_local + pot_Temp(i) |
990 |
enddo |
991 |
|
992 |
endif |
993 |
#endif |
994 |
|
995 |
if (FF_RequiresPostpairCalc() .and. SIM_requires_postpair_calc) then |
996 |
|
997 |
if ((FF_uses_RF .and. SIM_uses_RF) .or. (corrMethod == 3)) then |
998 |
|
999 |
#ifdef IS_MPI |
1000 |
call scatter(rf_Row,rf,plan_atom_row_3d) |
1001 |
call scatter(rf_Col,rf_Temp,plan_atom_col_3d) |
1002 |
do i = 1,nlocal |
1003 |
rf(1:3,i) = rf(1:3,i) + rf_Temp(1:3,i) |
1004 |
end do |
1005 |
#endif |
1006 |
|
1007 |
do i = 1, nLocal |
1008 |
|
1009 |
rfpot = 0.0_DP |
1010 |
#ifdef IS_MPI |
1011 |
me_i = atid_row(i) |
1012 |
#else |
1013 |
me_i = atid(i) |
1014 |
#endif |
1015 |
iHash = InteractionHash(me_i,me_j) |
1016 |
|
1017 |
if ( iand(iHash, ELECTROSTATIC_PAIR).ne.0 ) then |
1018 |
|
1019 |
mu_i = getDipoleMoment(me_i) |
1020 |
|
1021 |
!! The reaction field needs to include a self contribution |
1022 |
!! to the field: |
1023 |
call accumulate_self_rf(i, mu_i, eFrame) |
1024 |
!! Get the reaction field contribution to the |
1025 |
!! potential and torques: |
1026 |
call reaction_field_final(i, mu_i, eFrame, rfpot, t, do_pot) |
1027 |
#ifdef IS_MPI |
1028 |
pot_local = pot_local + rfpot |
1029 |
#else |
1030 |
pot = pot + rfpot |
1031 |
|
1032 |
#endif |
1033 |
endif |
1034 |
enddo |
1035 |
endif |
1036 |
endif |
1037 |
|
1038 |
|
1039 |
#ifdef IS_MPI |
1040 |
|
1041 |
if (do_pot) then |
1042 |
pot = pot + pot_local |
1043 |
!! we assume the c code will do the allreduce to get the total potential |
1044 |
!! we could do it right here if we needed to... |
1045 |
endif |
1046 |
|
1047 |
if (do_stress) then |
1048 |
call mpi_allreduce(tau_Temp, tau, 9,mpi_double_precision,mpi_sum, & |
1049 |
mpi_comm_world,mpi_err) |
1050 |
call mpi_allreduce(virial_Temp, virial,1,mpi_double_precision,mpi_sum, & |
1051 |
mpi_comm_world,mpi_err) |
1052 |
endif |
1053 |
|
1054 |
#else |
1055 |
|
1056 |
if (do_stress) then |
1057 |
tau = tau_Temp |
1058 |
virial = virial_Temp |
1059 |
endif |
1060 |
|
1061 |
#endif |
1062 |
|
1063 |
end subroutine do_force_loop |
1064 |
|
1065 |
subroutine do_pair(i, j, rijsq, d, sw, do_pot, & |
1066 |
eFrame, A, f, t, pot, vpair, fpair) |
1067 |
|
1068 |
real( kind = dp ) :: pot, vpair, sw |
1069 |
real( kind = dp ), dimension(3) :: fpair |
1070 |
real( kind = dp ), dimension(nLocal) :: mfact |
1071 |
real( kind = dp ), dimension(9,nLocal) :: eFrame |
1072 |
real( kind = dp ), dimension(9,nLocal) :: A |
1073 |
real( kind = dp ), dimension(3,nLocal) :: f |
1074 |
real( kind = dp ), dimension(3,nLocal) :: t |
1075 |
|
1076 |
logical, intent(inout) :: do_pot |
1077 |
integer, intent(in) :: i, j |
1078 |
real ( kind = dp ), intent(inout) :: rijsq |
1079 |
real ( kind = dp ) :: r |
1080 |
real ( kind = dp ), intent(inout) :: d(3) |
1081 |
integer :: me_i, me_j |
1082 |
|
1083 |
integer :: iHash |
1084 |
|
1085 |
r = sqrt(rijsq) |
1086 |
vpair = 0.0d0 |
1087 |
fpair(1:3) = 0.0d0 |
1088 |
|
1089 |
#ifdef IS_MPI |
1090 |
me_i = atid_row(i) |
1091 |
me_j = atid_col(j) |
1092 |
#else |
1093 |
me_i = atid(i) |
1094 |
me_j = atid(j) |
1095 |
#endif |
1096 |
|
1097 |
iHash = InteractionHash(me_i, me_j) |
1098 |
|
1099 |
if ( iand(iHash, LJ_PAIR).ne.0 ) then |
1100 |
call do_lj_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, f, do_pot) |
1101 |
endif |
1102 |
|
1103 |
if ( iand(iHash, ELECTROSTATIC_PAIR).ne.0 ) then |
1104 |
call doElectrostaticPair(i, j, d, r, rijsq, sw, vpair, fpair, & |
1105 |
pot, eFrame, f, t, do_pot, corrMethod, rcuti) |
1106 |
|
1107 |
if ((FF_uses_RF .and. SIM_uses_RF) .or. (corrMethod == 3)) then |
1108 |
|
1109 |
! CHECK ME (RF needs to know about all electrostatic types) |
1110 |
call accumulate_rf(i, j, r, eFrame, sw) |
1111 |
call rf_correct_forces(i, j, d, r, eFrame, sw, f, fpair) |
1112 |
endif |
1113 |
|
1114 |
endif |
1115 |
|
1116 |
if ( iand(iHash, STICKY_PAIR).ne.0 ) then |
1117 |
call do_sticky_pair(i, j, d, r, rijsq, sw, vpair, fpair, & |
1118 |
pot, A, f, t, do_pot) |
1119 |
endif |
1120 |
|
1121 |
if ( iand(iHash, STICKYPOWER_PAIR).ne.0 ) then |
1122 |
call do_sticky_power_pair(i, j, d, r, rijsq, sw, vpair, fpair, & |
1123 |
pot, A, f, t, do_pot) |
1124 |
endif |
1125 |
|
1126 |
if ( iand(iHash, GAYBERNE_PAIR).ne.0 ) then |
1127 |
call do_gb_pair(i, j, d, r, rijsq, sw, vpair, fpair, & |
1128 |
pot, A, f, t, do_pot) |
1129 |
endif |
1130 |
|
1131 |
if ( iand(iHash, GAYBERNE_LJ).ne.0 ) then |
1132 |
! call do_gblj_pair(i, j, d, r, rijsq, sw, vpair, fpair, & |
1133 |
! pot, A, f, t, do_pot) |
1134 |
endif |
1135 |
|
1136 |
if ( iand(iHash, EAM_PAIR).ne.0 ) then |
1137 |
call do_eam_pair(i, j, d, r, rijsq, sw, vpair, fpair, pot, f, & |
1138 |
do_pot) |
1139 |
endif |
1140 |
|
1141 |
if ( iand(iHash, SHAPE_PAIR).ne.0 ) then |
1142 |
call do_shape_pair(i, j, d, r, rijsq, sw, vpair, fpair, & |
1143 |
pot, A, f, t, do_pot) |
1144 |
endif |
1145 |
|
1146 |
if ( iand(iHash, SHAPE_LJ).ne.0 ) then |
1147 |
call do_shape_pair(i, j, d, r, rijsq, sw, vpair, fpair, & |
1148 |
pot, A, f, t, do_pot) |
1149 |
endif |
1150 |
|
1151 |
end subroutine do_pair |
1152 |
|
1153 |
subroutine do_prepair(i, j, rijsq, d, sw, rcijsq, dc, & |
1154 |
do_pot, do_stress, eFrame, A, f, t, pot) |
1155 |
|
1156 |
real( kind = dp ) :: pot, sw |
1157 |
real( kind = dp ), dimension(9,nLocal) :: eFrame |
1158 |
real (kind=dp), dimension(9,nLocal) :: A |
1159 |
real (kind=dp), dimension(3,nLocal) :: f |
1160 |
real (kind=dp), dimension(3,nLocal) :: t |
1161 |
|
1162 |
logical, intent(inout) :: do_pot, do_stress |
1163 |
integer, intent(in) :: i, j |
1164 |
real ( kind = dp ), intent(inout) :: rijsq, rcijsq |
1165 |
real ( kind = dp ) :: r, rc |
1166 |
real ( kind = dp ), intent(inout) :: d(3), dc(3) |
1167 |
|
1168 |
integer :: me_i, me_j, iHash |
1169 |
|
1170 |
r = sqrt(rijsq) |
1171 |
|
1172 |
#ifdef IS_MPI |
1173 |
me_i = atid_row(i) |
1174 |
me_j = atid_col(j) |
1175 |
#else |
1176 |
me_i = atid(i) |
1177 |
me_j = atid(j) |
1178 |
#endif |
1179 |
|
1180 |
iHash = InteractionHash(me_i, me_j) |
1181 |
|
1182 |
if ( iand(iHash, EAM_PAIR).ne.0 ) then |
1183 |
call calc_EAM_prepair_rho(i, j, d, r, rijsq ) |
1184 |
endif |
1185 |
|
1186 |
end subroutine do_prepair |
1187 |
|
1188 |
|
1189 |
subroutine do_preforce(nlocal,pot) |
1190 |
integer :: nlocal |
1191 |
real( kind = dp ) :: pot |
1192 |
|
1193 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
1194 |
call calc_EAM_preforce_Frho(nlocal,pot) |
1195 |
endif |
1196 |
|
1197 |
|
1198 |
end subroutine do_preforce |
1199 |
|
1200 |
|
1201 |
subroutine get_interatomic_vector(q_i, q_j, d, r_sq) |
1202 |
|
1203 |
real (kind = dp), dimension(3) :: q_i |
1204 |
real (kind = dp), dimension(3) :: q_j |
1205 |
real ( kind = dp ), intent(out) :: r_sq |
1206 |
real( kind = dp ) :: d(3), scaled(3) |
1207 |
integer i |
1208 |
|
1209 |
d(1:3) = q_j(1:3) - q_i(1:3) |
1210 |
|
1211 |
! Wrap back into periodic box if necessary |
1212 |
if ( SIM_uses_PBC ) then |
1213 |
|
1214 |
if( .not.boxIsOrthorhombic ) then |
1215 |
! calc the scaled coordinates. |
1216 |
|
1217 |
scaled = matmul(HmatInv, d) |
1218 |
|
1219 |
! wrap the scaled coordinates |
1220 |
|
1221 |
scaled = scaled - anint(scaled) |
1222 |
|
1223 |
|
1224 |
! calc the wrapped real coordinates from the wrapped scaled |
1225 |
! coordinates |
1226 |
|
1227 |
d = matmul(Hmat,scaled) |
1228 |
|
1229 |
else |
1230 |
! calc the scaled coordinates. |
1231 |
|
1232 |
do i = 1, 3 |
1233 |
scaled(i) = d(i) * HmatInv(i,i) |
1234 |
|
1235 |
! wrap the scaled coordinates |
1236 |
|
1237 |
scaled(i) = scaled(i) - anint(scaled(i)) |
1238 |
|
1239 |
! calc the wrapped real coordinates from the wrapped scaled |
1240 |
! coordinates |
1241 |
|
1242 |
d(i) = scaled(i)*Hmat(i,i) |
1243 |
enddo |
1244 |
endif |
1245 |
|
1246 |
endif |
1247 |
|
1248 |
r_sq = dot_product(d,d) |
1249 |
|
1250 |
end subroutine get_interatomic_vector |
1251 |
|
1252 |
subroutine zero_work_arrays() |
1253 |
|
1254 |
#ifdef IS_MPI |
1255 |
|
1256 |
q_Row = 0.0_dp |
1257 |
q_Col = 0.0_dp |
1258 |
|
1259 |
q_group_Row = 0.0_dp |
1260 |
q_group_Col = 0.0_dp |
1261 |
|
1262 |
eFrame_Row = 0.0_dp |
1263 |
eFrame_Col = 0.0_dp |
1264 |
|
1265 |
A_Row = 0.0_dp |
1266 |
A_Col = 0.0_dp |
1267 |
|
1268 |
f_Row = 0.0_dp |
1269 |
f_Col = 0.0_dp |
1270 |
f_Temp = 0.0_dp |
1271 |
|
1272 |
t_Row = 0.0_dp |
1273 |
t_Col = 0.0_dp |
1274 |
t_Temp = 0.0_dp |
1275 |
|
1276 |
pot_Row = 0.0_dp |
1277 |
pot_Col = 0.0_dp |
1278 |
pot_Temp = 0.0_dp |
1279 |
|
1280 |
rf_Row = 0.0_dp |
1281 |
rf_Col = 0.0_dp |
1282 |
rf_Temp = 0.0_dp |
1283 |
|
1284 |
#endif |
1285 |
|
1286 |
if (FF_uses_EAM .and. SIM_uses_EAM) then |
1287 |
call clean_EAM() |
1288 |
endif |
1289 |
|
1290 |
rf = 0.0_dp |
1291 |
tau_Temp = 0.0_dp |
1292 |
virial_Temp = 0.0_dp |
1293 |
end subroutine zero_work_arrays |
1294 |
|
1295 |
function skipThisPair(atom1, atom2) result(skip_it) |
1296 |
integer, intent(in) :: atom1 |
1297 |
integer, intent(in), optional :: atom2 |
1298 |
logical :: skip_it |
1299 |
integer :: unique_id_1, unique_id_2 |
1300 |
integer :: me_i,me_j |
1301 |
integer :: i |
1302 |
|
1303 |
skip_it = .false. |
1304 |
|
1305 |
!! there are a number of reasons to skip a pair or a particle |
1306 |
!! mostly we do this to exclude atoms who are involved in short |
1307 |
!! range interactions (bonds, bends, torsions), but we also need |
1308 |
!! to exclude some overcounted interactions that result from |
1309 |
!! the parallel decomposition |
1310 |
|
1311 |
#ifdef IS_MPI |
1312 |
!! in MPI, we have to look up the unique IDs for each atom |
1313 |
unique_id_1 = AtomRowToGlobal(atom1) |
1314 |
#else |
1315 |
!! in the normal loop, the atom numbers are unique |
1316 |
unique_id_1 = atom1 |
1317 |
#endif |
1318 |
|
1319 |
!! We were called with only one atom, so just check the global exclude |
1320 |
!! list for this atom |
1321 |
if (.not. present(atom2)) then |
1322 |
do i = 1, nExcludes_global |
1323 |
if (excludesGlobal(i) == unique_id_1) then |
1324 |
skip_it = .true. |
1325 |
return |
1326 |
end if |
1327 |
end do |
1328 |
return |
1329 |
end if |
1330 |
|
1331 |
#ifdef IS_MPI |
1332 |
unique_id_2 = AtomColToGlobal(atom2) |
1333 |
#else |
1334 |
unique_id_2 = atom2 |
1335 |
#endif |
1336 |
|
1337 |
#ifdef IS_MPI |
1338 |
!! this situation should only arise in MPI simulations |
1339 |
if (unique_id_1 == unique_id_2) then |
1340 |
skip_it = .true. |
1341 |
return |
1342 |
end if |
1343 |
|
1344 |
!! this prevents us from doing the pair on multiple processors |
1345 |
if (unique_id_1 < unique_id_2) then |
1346 |
if (mod(unique_id_1 + unique_id_2,2) == 0) then |
1347 |
skip_it = .true. |
1348 |
return |
1349 |
endif |
1350 |
else |
1351 |
if (mod(unique_id_1 + unique_id_2,2) == 1) then |
1352 |
skip_it = .true. |
1353 |
return |
1354 |
endif |
1355 |
endif |
1356 |
#endif |
1357 |
|
1358 |
!! the rest of these situations can happen in all simulations: |
1359 |
do i = 1, nExcludes_global |
1360 |
if ((excludesGlobal(i) == unique_id_1) .or. & |
1361 |
(excludesGlobal(i) == unique_id_2)) then |
1362 |
skip_it = .true. |
1363 |
return |
1364 |
endif |
1365 |
enddo |
1366 |
|
1367 |
do i = 1, nSkipsForAtom(atom1) |
1368 |
if (skipsForAtom(atom1, i) .eq. unique_id_2) then |
1369 |
skip_it = .true. |
1370 |
return |
1371 |
endif |
1372 |
end do |
1373 |
|
1374 |
return |
1375 |
end function skipThisPair |
1376 |
|
1377 |
function FF_UsesDirectionalAtoms() result(doesit) |
1378 |
logical :: doesit |
1379 |
doesit = FF_uses_DirectionalAtoms |
1380 |
end function FF_UsesDirectionalAtoms |
1381 |
|
1382 |
function FF_RequiresPrepairCalc() result(doesit) |
1383 |
logical :: doesit |
1384 |
doesit = FF_uses_EAM |
1385 |
end function FF_RequiresPrepairCalc |
1386 |
|
1387 |
function FF_RequiresPostpairCalc() result(doesit) |
1388 |
logical :: doesit |
1389 |
doesit = FF_uses_RF |
1390 |
if (corrMethod == 3) doesit = .true. |
1391 |
end function FF_RequiresPostpairCalc |
1392 |
|
1393 |
#ifdef PROFILE |
1394 |
function getforcetime() result(totalforcetime) |
1395 |
real(kind=dp) :: totalforcetime |
1396 |
totalforcetime = forcetime |
1397 |
end function getforcetime |
1398 |
#endif |
1399 |
|
1400 |
!! This cleans componets of force arrays belonging only to fortran |
1401 |
|
1402 |
subroutine add_stress_tensor(dpair, fpair) |
1403 |
|
1404 |
real( kind = dp ), dimension(3), intent(in) :: dpair, fpair |
1405 |
|
1406 |
! because the d vector is the rj - ri vector, and |
1407 |
! because fx, fy, fz are the force on atom i, we need a |
1408 |
! negative sign here: |
1409 |
|
1410 |
tau_Temp(1) = tau_Temp(1) - dpair(1) * fpair(1) |
1411 |
tau_Temp(2) = tau_Temp(2) - dpair(1) * fpair(2) |
1412 |
tau_Temp(3) = tau_Temp(3) - dpair(1) * fpair(3) |
1413 |
tau_Temp(4) = tau_Temp(4) - dpair(2) * fpair(1) |
1414 |
tau_Temp(5) = tau_Temp(5) - dpair(2) * fpair(2) |
1415 |
tau_Temp(6) = tau_Temp(6) - dpair(2) * fpair(3) |
1416 |
tau_Temp(7) = tau_Temp(7) - dpair(3) * fpair(1) |
1417 |
tau_Temp(8) = tau_Temp(8) - dpair(3) * fpair(2) |
1418 |
tau_Temp(9) = tau_Temp(9) - dpair(3) * fpair(3) |
1419 |
|
1420 |
virial_Temp = virial_Temp + & |
1421 |
(tau_Temp(1) + tau_Temp(5) + tau_Temp(9)) |
1422 |
|
1423 |
end subroutine add_stress_tensor |
1424 |
|
1425 |
end module doForces |