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C $Header: /u/gcmpack/MITgcm/pkg/flt/flt_mapping.F,v 1.2 2009/02/10 17:29:32 jmc Exp $ |
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C $Name: $ |
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|
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#include "FLT_OPTIONS.h" |
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|
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C-- Contents |
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C-- o FLT_MAP_XY2IJLOCAL |
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C-- o FLT_MAP_IJLOCAL2XY |
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C-- o FLT_MAP_R2K (Function) |
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C-- o FLT_MAP_K2R (Function) |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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SUBROUTINE FLT_MAP_XY2IJLOCAL( |
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O ix, jy, |
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I xx, yy, bi, bj, myThid ) |
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|
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C ================================================================== |
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C SUBROUTINE FLT_MAP_XY2IJLOCAL |
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C ================================================================== |
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C o Converts global x,y-coordinates (grid) to corresponding |
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C local fractional horizontal indices for specific tile |
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C Range: [1/2 , sNx+1/2] , [1/2 , sNy+1/2] |
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C Center (Tracer Pt) <-> integer , integer |
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C U-velocity Pt <-> half integer , integer |
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C V-velocity Pt <-> integer , half integer |
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C Vorticity Pt <-> half integer , half integer |
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C ================================================================== |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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C == global variables == |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "GRID.h" |
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#include "PARAMS.h" |
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|
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C == routine arguments == |
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_RL ix, jy |
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_RL xx, yy |
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INTEGER bi, bj, myThid |
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|
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C == local variables == |
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_RL fm, dist |
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INTEGER i, j |
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|
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C == end of interface == |
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|
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IF ( usingCartesianGrid .OR. |
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& usingSphericalPolarGrid .AND. .NOT.rotateGrid |
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& ) THEN |
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|
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ix = -1. _d 0 |
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jy = -1. _d 0 |
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|
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j = 1 |
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DO i=0,sNx+1 |
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IF ( ix.EQ.-1. _d 0 ) THEN |
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IF ( xG(i,j,bi,bj).LE.xx .AND. xx.LT.xG(i+1,j,bi,bj) ) THEN |
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dist = xG(i+1,j,bi,bj) - xG(i,j,bi,bj) |
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fm = ( xx - xG(i,j,bi,bj) ) / dist |
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ix = DFLOAT(i)+fm-0.5 _d 0 |
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ENDIF |
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ENDIF |
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ENDDO |
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|
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i = 1 |
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DO j=0,sNy+1 |
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IF ( jy.EQ.-1. _d 0 ) THEN |
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IF ( yG(i,j,bi,bj).LE.yy .AND. yy.LT.yG(i,j+1,bi,bj) ) THEN |
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dist = yG(i,j+1,bi,bj) - yG(i,j,bi,bj) |
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fm = ( yy - yG(i,j,bi,bj) ) / dist |
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jy = DFLOAT(j)+fm-0.5 _d 0 |
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ENDIF |
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ENDIF |
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ENDDO |
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|
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ELSE |
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STOP 'FLT_MAP_XY2IJLOCAL: not yet coded for this grid' |
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ENDIF |
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|
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RETURN |
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END |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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SUBROUTINE FLT_MAP_IJLOCAL2XY( |
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O xx, yy, |
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I ix, jy, bi, bj, myThid ) |
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|
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C ================================================================== |
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C SUBROUTINE FLT_MAP_IJLOCAL2XY |
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C ================================================================== |
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C o Converts local fractional horizontal indices for specific tile |
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C to corresponding global x,y-coordinates (grid) |
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C Range: [1/2 , sNx+1/2] , [1/2 , sNy+1/2] |
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C Center (Tracer Pt) <-> integer , integer |
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C U-velocity Pt <-> half integer , integer |
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C V-velocity Pt <-> integer , half integer |
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C Vorticity Pt <-> half integer , half integer |
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C ================================================================== |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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C == global variables == |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "GRID.h" |
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#include "PARAMS.h" |
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|
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C == routine arguments == |
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_RL xx, yy |
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_RL ix, jy |
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INTEGER bi, bj, myThid |
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|
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C == local variables == |
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_RL ddx, ddy |
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INTEGER i, j |
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|
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C == end of interface == |
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|
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IF ( usingCartesianGrid .OR. |
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& usingSphericalPolarGrid .AND. .NOT.rotateGrid |
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& ) THEN |
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|
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i = NINT(ix) |
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j = NINT(jy) |
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ddx = 0.5 _d 0 + ix - DFLOAT(i) |
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ddy = 0.5 _d 0 + jy - DFLOAT(j) |
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|
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xx = xG(i,j,bi,bj) + ddx*( xG(i+1,j,bi,bj) - xG(i,j,bi,bj) ) |
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yy = yG(i,j,bi,bj) + ddy*( yG(i,j+1,bi,bj) - yG(i,j,bi,bj) ) |
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|
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ELSE |
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STOP 'FLT_MAP_IJLOCAL2XY: not yet coded for this grid' |
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ENDIF |
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|
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RETURN |
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END |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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_RL FUNCTION FLT_MAP_R2K( |
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I rr, bi, bj, myThid ) |
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|
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C ================================================================== |
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C FUNCTION FLT_MAP_R2K |
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C ================================================================== |
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C o Converts r-coordinate (grid) to corresponding |
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C fractional vertical index |
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C Range: [1/2 , Nr+1/2], |
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C Center (Tracer Pt) <-> integer |
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C Interface (wVel Pt) <-> half integer |
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C ================================================================== |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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C == global variables == |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "GRID.h" |
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|
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C == routine arguments == |
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_RL rr |
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INTEGER bi, bj, myThid |
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|
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C == local variables == |
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_RL fm |
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INTEGER k |
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|
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C == end of interface == |
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|
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FLT_MAP_R2K = 0. _d 0 |
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DO k=1,Nr |
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IF ( FLT_MAP_R2K .EQ. 0. _d 0 ) THEN |
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C- r decreases when k increases (rkSign < 0): |
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IF ( rF(k) .GE. rr .AND. rr.GT.rF(k+1) ) THEN |
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fm = ( rr - rF(k) ) * recip_drF(k)*rkSign |
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FLT_MAP_R2K = DFLOAT(k)+fm-0.5 _d 0 |
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ENDIF |
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ENDIF |
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ENDDO |
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|
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RETURN |
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END |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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_RL FUNCTION FLT_MAP_K2R( |
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I kr, bi, bj, myThid ) |
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|
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C ================================================================== |
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C FUNCTION FLT_MAP_K2R |
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C ================================================================== |
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C o Converts fractional vertical index to corresponding |
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C r-coordinate (grid) |
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C Range: [1/2 , Nr+1/2], |
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C Center (Tracer Pt) <-> integer |
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C Interface (wVel Pt) <-> half integer |
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C ================================================================== |
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|
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C !USES: |
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IMPLICIT NONE |
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|
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C == global variables == |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "GRID.h" |
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|
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C == routine arguments == |
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_RL kr |
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INTEGER bi, bj, myThid |
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|
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C == local variables == |
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_RL ddz |
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INTEGER k |
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|
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C == end of interface == |
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|
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k = NINT(kr) |
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IF ( k.LT.1 ) THEN |
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FLT_MAP_K2R = rF(1) |
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ELSEIF ( k.GT.Nr ) THEN |
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FLT_MAP_K2R = rF(Nr+1) |
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ELSE |
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ddz = 0.5 _d 0 + kr - DFLOAT(k) |
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FLT_MAP_K2R = rF(k) + ddz*drF(k)*rkSign |
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ENDIF |
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|
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RETURN |
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END |
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