!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !! - Ariane - (May - 2007) !! !! bruno.blanke@univ-brest.fr and nicolas.grima@univ-brest.fr !! !! This software is a computer program whose purpose is !! the computation of 3D streamlines in a given velocity field !! (as the output of an Ocean General Circulation Model) and !! subsequent water masses analyses. !! !! This software is governed by the CeCILL license under French law and !! abiding by the rules of distribution of free software. You can use, !! modify and/ or redistribute the software under the terms of the CeCILL !! license as circulated by CEA, CNRS and INRIA at the following URL !! "http://www.cecill.info". !! !! As a counterpart to the access to the source code and rights to copy, !! modify and redistribute granted by the license, users are provided only !! with a limited warranty and the software's author, the holder of the !! economic rights, and the successive licensors have only limited !! liability. !! !! In this respect, the user's attention is drawn to the risks associated !! with loading, using, modifying and/or developing or reproducing the !! software by the user in light of its specific status of free software, !! that may mean that it is complicated to manipulate, and that also !! therefore means that it is reserved for developers and experienced !! professionals having in-depth computer knowledge. Users are therefore !! encouraged to load and test the software's suitability as regards their !! requirements in conditions enabling the security of their systems and/or !! data to be ensured and, more generally, to use and operate it in the !! same conditions as regards security. !! !! The fact that you are presently reading this means that you have had !! knowledge of the CeCILL license and that you accept its terms. !! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!****h* ariane/mod_fx !! NAME !! mod_fx (mod_fx.f90 - Fortran90 module) !! !! USAGE !! Include 'USE mod_fx' in the header of your Fortran 90 source !! code. !! Then you'll have access to the subroutine: !! - fx !! !! AUTHOR !! * Origin : Bruno Blanke (1992) !! * F77toF90: Nicolas Grima (April-May 2005) !! !! CREATION DATE !! * April-May 2005 !! !! HISTORY !! Date (dd/mm/yyyy/) - Modification(s) !! !! RESULT !! !! !! EXAMPLES !! * Use mod_fx !! !! NOTES !! ROBODoc header style. !! !! TODO !! !! !! PORTABILITY !! Machine-OS - Fortran90/95 compiler !! * i686-pc-linux-gnu - ifort !! * i686-pc-linux-gnu - g95 !! !! SEE ALSO !! * mod_fy !! * mod_fz !! !! USES !! * USE mod_precision !! * USE mod_namelist !! * USE mod_input_grid !! !! USED BY !! * posini !! * trajec !! !! SOURCE !!========================================================================= MODULE mod_fx USE mod_precision USE mod_namelist USE mod_input_grid USE mod_reducmem IMPLICIT NONE CONTAINS !!*** !======================================================================== !!****f* mod_fx/fx() !! NAME !! fx() !! !! FUNCTION !! fx computes the ... !! !! AUTHOR !! * Origin : Bruno Blanke (1992) !! * F77toF90: Nicolas Grima (April-May 2005) !! !! CREATION DATE !! * April-May 2005 !! !! HISTORY !! Date (dd/mm/yyyy/) - Modification(s) !! !! ARGUMENTS !! * gi: i position. !! * gj: j position. !! !! TODO !! * add comments !! !! USED BY !! * posini !! * trajec !! * mod_quant !! !! SOURCE !!======================================================================= FUNCTION fx(gi,gj) !-------------! ! Declaration ! !-------------! !- arguments -! REAL(kind=rprec), INTENT(in) :: gi, gj REAL(kind=rprec) :: fx !- local variables -! REAL(kind=rprec) :: xx_uu_SW REAL(kind=rprec) :: xx_uu_NW REAL(kind=rprec) :: xx_uu_SE REAL(kind=rprec) :: xx_uu_NE INTEGER(kind=iprec) :: i1, i2, i1s, i2s INTEGER(kind=iprec) :: j1, j2, j1s, j2s INTEGER(kind=iprec) :: k1s, k2s !!NG: 29/06/2009 INTEGER(kind=iprec) :: iper REAL(kind=rprec) :: a, b !-------------! ! Code begins ! !-------------! !!!!!!!!!!!!!!!!!!!!!!! !! Longitude Indices !! !!!!!!!!!!!!!!!!!!!!!!! i1 = INT(gi) ! i1 = integer part of gi i2 = i1 + 1 a = gi - AINT(gi) !!NG: 29/06/2009 iper = 0 ! initialize iper (key_periodic) !- test if the grid is periodic -! IF (key_periodic) THEN !!NG: 29/06/2009 IF (i1 == 1) iper = 1 IF (i2 >= imt) THEN i1 = 1 i2 = 2 !!NG: 29/06/2009 iper = 1 ENDIF ELSE IF (i2 > imt) i2 = i1 ENDIF !!!!!!!!!!!!!!!!!!!!!!! !! Latitude Indices !! !!!!!!!!!!!!!!!!!!!!!!! j1 = INT(gj+0.5_rprec) j2 = j1 + 1 b = (gj + 0.5_rprec) - j1 IF (j2 > jmt) j2 = j1 !--------------------------------------------------------------! ! Here fx is computed ! !--------------------------------------------------------------! CALL sub_reducmem_shift_or_not_ind(i1,j1,1,i1s,j1s,k1s) CALL sub_reducmem_shift_or_not_ind(i2,j2,1,i2s,j2s,k2s) !---------------! !- Periodicity -! !---------------! ! independant of where the longitude is cutted and ! longitude conventions: 0/360 or -180/180 or 80/420 IF (xx_uu(i1s, j1s, 1, 1) > xx_uu(i2s, j1s, 1, 1)) THEN xx_uu_SW=xx_uu(i1s, j1s, 1, 1) - 360._rprec ELSE xx_uu_SW = xx_uu(i1s, j1s, 1, 1) ENDIF IF (xx_uu(i1s, j2s, 1, 1) > xx_uu(i2s, j2s, 1, 1)) THEN xx_uu_NW=xx_uu(i1s, j2s, 1, 1) - 360._rprec ELSE xx_uu_NW = xx_uu(i1s, j2s, 1, 1) ENDIF xx_uu_SE=xx_uu(i2s, j1s, 1, 1) xx_uu_NE=xx_uu(i2s, j2s, 1, 1) !--------------! !- Compute fx -! !--------------! !!NG: write(*,*)'xx_uu(i1s, j1s, 1, 1), xx_uu_SW: ', xx_uu(i1s, j1s, 1, 1), xx_uu_SW !!NG: write(*,*)'xx_uu(i1s, j2s, 1, 1), xx_uu_NW: ', xx_uu(i1s, j2s, 1, 1), xx_uu_NW !!NG: write(*,*)'xx_uu(i2s, j1s, 1, 1), xx_uu_SE: ', xx_uu(i2s, j1s, 1, 1), xx_uu_SE !!NG: write(*,*)'xx_uu(i2s, j2s, 1, 1), xx_uu_NE: ', xx_uu(i2s, j2s, 1, 1), xx_uu_NE fx = (1._rprec-a) * (1._rprec-b) * xx_uu_SW + & (1._rprec-a) * b * xx_uu_NW + & a * (1._rprec-b) * xx_uu_SE + & a * b * xx_uu_NE ! add BB 25/06/09 blindage drakkar IF (fx > 180._rprec) fx=fx-180._rprec ! end BB 25/06/09 blindage drakkar !--------------------------------------------------------------! RETURN END FUNCTION fx !!*** END MODULE mod_fx