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C $Header: /u/gcmpack/MITgcm/eesupp/src/fill_cs_corner_uv_rs.F,v 1.3 2009/05/12 19:53:03 jmc Exp $ |
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C $Name: $ |
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#include "PACKAGES_CONFIG.h" |
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#include "CPP_EEOPTIONS.h" |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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CBOP |
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C !ROUTINE: FILL_CS_CORNER_UV_RS |
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C !INTERFACE: |
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SUBROUTINE FILL_CS_CORNER_UV_RS( |
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I withSigns, |
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U uFld, vFld, |
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I bi,bj, myThid) |
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IMPLICIT NONE |
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C !DESCRIPTION: |
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C *==========================================================* |
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C | SUBROUTINE FILL_CS_CORNER_UV_RS |
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1.4 |
C | o Fill the corner-halo region of CS-grid, |
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C | for a 2 components, C-grid vector field |
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C *==========================================================* |
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C | o the corner halo region is filled with valid values |
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C | in order to extend in X and Y direction calculations |
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C | of fluxes, on a wide stencil. |
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C *==========================================================* |
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C !USES: |
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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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#ifdef ALLOW_EXCH2 |
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#include "W2_EXCH2_SIZE.h" |
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1.1 |
#include "W2_EXCH2_TOPOLOGY.h" |
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#endif /* ALLOW_EXCH2 */ |
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine arguments == |
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C |
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C withSigns :: uFld,vFld are vector components |
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C uFld :: u-component, at C-grid West point location |
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C vFld :: v-component, at C-grid SOuth point location |
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C bi,bj :: tile indices |
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C myThid :: thread number |
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LOGICAL withSigns |
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_RS uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RS vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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INTEGER bi,bj |
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INTEGER myThid |
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C !LOCAL VARIABLES: |
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C == Local variables == |
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C i,j :: loop indices |
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C myTile :: tile number |
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INTEGER i,j |
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LOGICAL southWestCorner |
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LOGICAL southEastCorner |
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LOGICAL northWestCorner |
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LOGICAL northEastCorner |
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_RL negOne |
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#ifdef ALLOW_EXCH2 |
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INTEGER myTile |
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#endif |
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CEOP |
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IF (useCubedSphereExchange) THEN |
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negOne = 1. _d 0 |
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IF (withSigns) negOne = -1. _d 0 |
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#ifdef ALLOW_EXCH2 |
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myTile = W2_myTileList(bi,bj) |
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southWestCorner = exch2_isWedge(myTile).EQ.1 |
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& .AND. exch2_isSedge(myTile).EQ.1 |
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southEastCorner = exch2_isEedge(myTile).EQ.1 |
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& .AND. exch2_isSedge(myTile).EQ.1 |
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northEastCorner = exch2_isEedge(myTile).EQ.1 |
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& .AND. exch2_isNedge(myTile).EQ.1 |
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northWestCorner = exch2_isWedge(myTile).EQ.1 |
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& .AND. exch2_isNedge(myTile).EQ.1 |
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#else |
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southWestCorner = .TRUE. |
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southEastCorner = .TRUE. |
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northWestCorner = .TRUE. |
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northEastCorner = .TRUE. |
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#endif |
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C-- To extend calculations in X direction, fill uFld array |
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C with valid value in the corner. |
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C e.g., NW corner: copy V( 0,sNy ) into U( -1,sNy+1) |
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C copy V( 0,sNy-1) into U( -2,sNy+1) |
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C copy V( -1,sNy ) into U( -1,sNy+2) |
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C copy V( -1,sNy-1) into U( -2,sNy+2) |
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C | | |
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C U(-1,sNy+1) U(1,sNy+1) U(2,sNy+1) |
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C | ^ | | |
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C -----|--\--------corner----------| |
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C | \ | | |
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C | \ | |
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C | \ | |
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C -----|---V(0,sNy)--|--------------- |
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C | | |
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C |
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C-- to extend calculations in Y direction, fill vFld array |
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C with valid value in the corner. |
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C e.g., NW corner: copy U( 2,sNy+1) into V( 0,sNy+2) |
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C copy U( 3,sNy+1) into V( 0,sNy+3) |
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C copy U( 2,sNy+2) into V( -1,sNy+2) |
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C copy U( 3,sNy+2) into V( -1,sNy+3) |
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C | | | |
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C -----|--V(0,sNy+2)--|--------------| |
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C | ^====================\ |
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C U(-1,sNy+1) U(1,sNy+1) U(2,sNy+1) |
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C | | | |
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C -----|--V(0,sNy+1)--o--------------| |
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C | |\ | |
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C | | \=corner |
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C | | |
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C -----|--V(0,sNy)----|-- |
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C | | |
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C |
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IF ( southWestCorner ) THEN |
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C- prepare for direction X: |
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DO j=1,OLy |
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DO i=1,OLx |
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uFld( 1-i , 1-j ) = negOne*vFld( 1-j , 1+i ) |
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ENDDO |
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ENDDO |
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C- prepare for direction Y: |
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DO j=1,OLy |
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DO i=1,OLx |
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vFld( 1-i , 1-j ) = negOne*uFld( 1+j , 1-i ) |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( southEastCorner ) THEN |
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C- prepare for direction X: |
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DO j=1,OLy |
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DO i=2,OLx |
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uFld(sNx+i, 1-j ) = vFld(sNx+j, i ) |
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ENDDO |
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ENDDO |
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C- prepare for direction Y: |
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DO j=1,OLy |
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DO i=1,OLx |
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vFld(sNx+i, 1-j ) = uFld(sNx+1-j, 1-i ) |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( northWestCorner ) THEN |
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C- prepare for direction X: |
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DO j=1,OLy |
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DO i=1,OLx |
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uFld( 1-i ,sNy+j) = vFld( 1-j , sNy+1-i ) |
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ENDDO |
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ENDDO |
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C- prepare for direction Y: |
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DO j=2,OLy |
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DO i=1,OLx |
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vFld( 1-i ,sNy+j) = uFld( j , sNy+i ) |
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ENDDO |
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ENDDO |
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ENDIF |
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IF ( northEastCorner ) THEN |
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C- prepare for direction X: |
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DO j=1,OLy |
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DO i=2,OLx |
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uFld(sNx+i,sNy+j) = negOne*vFld(sNx+j, sNy+2-i ) |
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ENDDO |
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ENDDO |
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C- prepare for direction Y: |
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DO j=2,OLy |
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DO i=1,OLx |
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vFld(sNx+i,sNy+j) = negOne*uFld(sNx+2-j, sNy+i ) |
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ENDDO |
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ENDDO |
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ENDIF |
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C-- End useCubedSphereExchange |
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ENDIF |
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RETURN |
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END |
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