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module fxysinus_m |
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! $Header: /home/cvsroot/LMDZ4/libf/dyn3d/fxysinus.F,v 1.1.1.1 2004/05/19 12:53:06 lmdzadmin Exp $ |
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SUBROUTINE fxysinus (rlatu,yprimu,rlatv,yprimv,rlatu1,yprimu1, |
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, rlatu2,yprimu2, |
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, rlonu,xprimu,rlonv,xprimv,rlonm025,xprimm025,rlonp025,xprimp025) |
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use dimens_m |
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use paramet_m |
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use comconst |
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use nr_util, only: pi |
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IMPLICIT NONE |
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c |
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c Calcul des longitudes et des latitudes pour une fonction f(x,y) |
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c avec y = Asin( j ) . |
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c |
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c Auteur : P. Le Van |
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c |
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c |
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INTEGER i,j |
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REAL rlatu(jjp1), yprimu(jjp1),rlatv(jjm), yprimv(jjm), |
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, rlatu1(jjm), yprimu1(jjm), rlatu2(jjm), yprimu2(jjm) |
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REAL rlonu(iip1),xprimu(iip1),rlonv(iip1),xprimv(iip1), |
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, rlonm025(iip1),xprimm025(iip1), rlonp025(iip1),xprimp025(iip1) |
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! |
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! $Header: /home/cvsroot/LMDZ4/libf/grid/fxy_sin.h,v 1.1.1.1 2004/05/19 12:53:05 lmdzadmin Exp $ |
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! |
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c----------------------------------------------------------------------- |
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c |
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c ................................................................ |
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c ................ Fonctions in line ........................... |
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c ................................................................ |
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c |
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REAL fy, fx, fxprim, fyprim |
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REAL ri, rj |
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c |
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c |
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fy(rj)=ASIN(1.+2.*((1.-rj)/FLOAT(jjm))) |
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fyprim(rj)=1./SQRT((rj-1.)*(jjm+1.-rj)) |
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fx ( ri ) = 2.*pi/FLOAT(iim) * ( ri - 0.5* FLOAT(iim) - 1. ) |
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c fx ( ri ) = 2.*pi/FLOAT(iim) * ( ri - 0.5* ( FLOAT(iim) + 1.) ) |
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fxprim( ri ) = 2.*pi/FLOAT(iim) |
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c |
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c |
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c La valeur de pi est passee par le common/const/ou /const2/ . |
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c Sinon, il faut la calculer avant d'appeler ces fonctions . |
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c |
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c ---------------------------------------------------------------- |
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c Fonctions a changer eventuellement, selon x(x) et y(y) choisis . |
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c ----------------------------------------------------------------- |
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c |
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c ..... ici, on a l'application particuliere suivante ........ |
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c |
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c ************************************** |
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c ** x = 2. * pi/iim * X ** |
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c ** y = pi/jjm * Y ** |
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c ************************************** |
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c |
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c .................................................................. |
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c .................................................................. |
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c |
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c |
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c |
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c----------------------------------------------------------------------- |
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c ...... calcul des latitudes et de y' ..... |
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c |
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DO j = 1, jjm + 1 |
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rlatu(j) = fy ( FLOAT( j ) ) |
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yprimu(j) = fyprim( FLOAT( j ) ) |
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ENDDO |
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DO j = 1, jjm |
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rlatv(j) = fy ( FLOAT( j ) + 0.5 ) |
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rlatu1(j) = fy ( FLOAT( j ) + 0.25 ) |
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rlatu2(j) = fy ( FLOAT( j ) + 0.75 ) |
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yprimv(j) = fyprim( FLOAT( j ) + 0.5 ) |
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yprimu1(j) = fyprim( FLOAT( j ) + 0.25 ) |
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yprimu2(j) = fyprim( FLOAT( j ) + 0.75 ) |
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ENDDO |
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c |
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c ..... calcul des longitudes et de x' ..... |
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c |
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DO i = 1, iim + 1 |
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rlonv(i) = fx ( FLOAT( i ) ) |
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rlonu(i) = fx ( FLOAT( i ) + 0.5 ) |
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rlonm025(i) = fx ( FLOAT( i ) - 0.25 ) |
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rlonp025(i) = fx ( FLOAT( i ) + 0.25 ) |
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xprimv (i) = fxprim ( FLOAT( i ) ) |
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xprimu (i) = fxprim ( FLOAT( i ) + 0.5 ) |
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xprimm025(i) = fxprim ( FLOAT( i ) - 0.25 ) |
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xprimp025(i) = fxprim ( FLOAT( i ) + 0.25 ) |
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ENDDO |
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c |
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RETURN |
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END |
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IMPLICIT NONE |
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private |
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public fxysinus |
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contains |
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SUBROUTINE fxysinus(rlatu, yprimu, rlatv, yprimv, rlatu1, yprimu1, rlatu2, & |
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yprimu2, rlonu, xprimu, rlonv, xprimv, rlonm025, xprimm025, rlonp025, & |
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xprimp025) |
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! From LMDZ4/libf/dyn3d/fxysinus.F, version 1.1.1.1, 2004/05/19 12:53:06 |
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! and LMDZ4/libf/grid/fxy_sin.h, v 1.1.1.1, 2004/05/19 12:53:05 |
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! Author: P. Le Van |
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! Calcul des longitudes et des latitudes pour une fonction f(x, y) |
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! avec y = Arcsin(j). |
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USE dimens_m, only: iim, jjm |
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USE nr_util, ONLY: pi |
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INTEGER i, j |
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REAL, intent(out):: rlatu(:), yprimu(:) ! (jjp1) |
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REAL, intent(out):: rlatv(:), yprimv(:) ! (jjm) |
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REAL, intent(out):: rlatu1(:) ! (jjm) |
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real, intent(out):: yprimu1(:), rlatu2(:), yprimu2(:) ! (jjm) |
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REAL, intent(out):: rlonu(:), xprimu(:), rlonv(:), xprimv(:) ! (iip1) |
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REAL, intent(out):: rlonm025(:) ! (iip1) |
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real, intent(out):: xprimm025(:), rlonp025(:), xprimp025(:) ! (iip1) |
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! Local: |
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real fxprim |
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!----------------------------------------------------------------------- |
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fxprim = 2. * pi / iim |
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! Calcul des latitudes et de y' |
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forall(j = 1: jjm + 1) |
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rlatu(j) = fy(real(j)) |
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yprimu(j) = fyprim(real(j)) |
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END forall |
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forall(j = 1: jjm) |
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rlatv(j) = fy(real(j) + 0.5) |
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rlatu1(j) = fy(real(j) + 0.25) |
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rlatu2(j) = fy(real(j) + 0.75) |
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yprimv(j) = fyprim(real(j) + 0.5) |
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yprimu1(j) = fyprim(real(j) + 0.25) |
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yprimu2(j) = fyprim(real(j) + 0.75) |
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END forall |
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! Calcul des longitudes et de x' |
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forall(i = 1: iim + 1) |
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rlonv(i) = fx(real(i)) |
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rlonu(i) = fx(real(i) + 0.5) |
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rlonm025(i) = fx(real(i) - 0.25) |
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rlonp025(i) = fx(real(i) + 0.25) |
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xprimv(i) = fxprim |
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xprimu(i) = fxprim |
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xprimm025(i) = fxprim |
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xprimp025(i) = fxprim |
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END forall |
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END SUBROUTINE fxysinus |
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! Fonctions à changer éventuellement, selon x(x) et y(y) choisis. |
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! Ici, on a l'application particulière suivante : |
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! x = 2 * pi / iim * X |
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! y = pi / jjm * Y |
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pure REAL function fy(rj) |
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USE dimens_m, only: jjm |
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REAL, intent(in):: rj |
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fy = asin(1. + 2. * ((1. - rj) / jjm)) |
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end function fy |
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pure real function fx(ri) |
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USE dimens_m, only: iim |
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USE nr_util, ONLY: pi |
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REAL, intent(in):: ri |
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fx = 2.*pi/real(iim)*(ri-0.5*real(iim)-1.) |
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end function fx |
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pure real function fyprim(rj) |
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USE dimens_m, only: jjm |
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REAL, intent(in):: rj |
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fyprim = 1./sqrt((rj-1.)*(jjm + 1.-rj)) |
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end function fyprim |
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end module fxysinus_m |
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