SUBROUTINE SINT(XF, & 2
ims, ime, jms, jme, icmask , &
its, ite, jts, jte, nf, xstag, ystag )
IMPLICIT NONE
INTEGER ims, ime, jms, jme, &
its, ite, jts, jte
LOGICAL icmask( ims:ime, jms:jme )
LOGICAL xstag, ystag
INTEGER nf, ior
REAL one12, one24, ep
PARAMETER(one12=1./12.,one24=1./24.)
PARAMETER(ior=2)
!
REAL XF(ims:ime,jms:jme,NF)
!
REAL Y(ims:ime,jms:jme,-IOR:IOR), &
Z(ims:ime,jms:jme,-IOR:IOR), &
F(ims:ime,jms:jme,0:1)
!
INTEGER I,J,II,JJ,IIM
INTEGER N2STAR, N2END, N1STAR, N1END
!
DATA EP/ 1.E-10/
!
! PARAMETER(NONOS=1)
! PARAMETER(N1OS=N1*NONOS+1-NONOS,N2OS=N2*NONOS+1-NONOS)
!
REAL W(ims:ime,jms:jme),OV(ims:ime,jms:jme),UN(ims:ime,jms:jme)
REAL MXM(ims:ime,jms:jme),MN(ims:ime,jms:jme)
REAL FL(ims:ime,jms:jme,0:1)
REAL XIG(81), XJG(81) ! won't use but nine of these fellers.
! COMMON /DEPAR2/ XIG(NF),XJG(NF),IG0(ims:ime,jms:jme),JG0(ims:ime,jms:jme)
INTEGER IFRST
integer rr
COMMON /DEPAR2/ XIG,XJG,IFRST
DATA IFRST /1/
REAL rioff, rjoff
!
REAL donor, y1, y2, a
DONOR(Y1,Y2,A)=(Y1*AMAX1(0.,SIGN(1.,A))-Y2*AMIN1(0.,SIGN(1.,A)))*A
REAL tr4, ym1, y0, yp1, yp2
TR4(YM1,Y0,YP1,YP2,A)=A*ONE12*(7.*(YP1+Y0)-(YP2+YM1)) &
-A*A*ONE24*(15.*(YP1-Y0)-(YP2-YM1))-A*A*A*ONE12*((YP1+Y0) &
-(YP2+YM1))+A*A*A*A*ONE24*(3.*(YP1-Y0)-(YP2-YM1))
REAL pp, pn, x
PP(X)=AMAX1(0.,X)
PN(X)=AMIN1(0.,X)
!! XIG(I) = 1./3.-FLOAT(I-1)*1./3
!! XJG(J) = 1./3.-FLOAT(J-1)*1./3
rr = nint(sqrt(float(nf)))
!! write(6,*) ' nf, rr are ',nf,rr
!! IF ( IFRST .EQ. 1 ) THEN
rioff = 0
rjoff = 0
if(xstag .and. (mod(rr,2) .eq. 0)) rioff = 1.
if(ystag .and. (mod(rr,2) .eq. 0)) rjoff = 1.
DO I=1,rr
DO J=1,rr
XIG(J+(I-1)*rr)=(float(rr)-1.-rioff)/float(2*rr)-FLOAT(J-1)*1./float(rr)
XJG(J+(I-1)*rr)=(float(rr)-1.-rjoff)/float(2*rr)-FLOAT(I-1)*1./float(rr)
ENDDO
ENDDO
IFRST = 0
!! ENDIF
! IF ( IFRST .EQ. 1 ) THEN
! DO I=1,3
! DO J=1,3
! XIG(J+(I-1)*3)=1./3.-FLOAT(J-1)*1./3.
! XJG(J+(I-1)*3)=1./3.-FLOAT(I-1)*1./3.
! ENDDO
! ENDDO
! IFRST = 0
! ENDIF
!
N2STAR = jts
N2END = jte
N1STAR = its
N1END = ite
DO 2000 IIM=1,NF
!
! HERE STARTS RESIDUAL ADVECTION
!
DO 9000 JJ=N2STAR,N2END
DO 50 J=-IOR,IOR
DO 51 I=-IOR,IOR
DO 511 II=N1STAR,N1END
IF ( icmask(II,JJ) ) Y(II,JJ,I)=XF(II+I,JJ+J,IIM)
511 CONTINUE
51 CONTINUE
DO 811 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
FL(II,JJ,0)=DONOR(Y(II,JJ,-1),Y(II,JJ,0),XIG(IIM))
FL(II,JJ,1)=DONOR(Y(II,JJ,0),Y(II,JJ,1),XIG(IIM))
ENDIF
811 CONTINUE
DO 812 II=N1STAR,N1END
IF ( icmask(II,JJ) ) W(II,JJ)=Y(II,JJ,0)-(FL(II,JJ,1)-FL(II,JJ,0))
812 CONTINUE
DO 813 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
MXM(II,JJ)= &
AMAX1(Y(II,JJ,-1),Y(II,JJ,0),Y(II,JJ,1), &
W(II,JJ))
MN(II,JJ)=AMIN1(Y(II,JJ,-1),Y(II,JJ,0),Y(II,JJ,1),W(II,JJ))
ENDIF
813 CONTINUE
DO 312 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
F(II,JJ,0)= &
TR4(Y(II,JJ,-2),Y(II,JJ,-1),Y(II,JJ,0), &
Y(II,JJ,1),XIG(IIM))
F(II,JJ,1)= &
TR4(Y(II,JJ,-1),Y(II,JJ,0),Y(II,JJ,1),Y(II,JJ,2),&
XIG(IIM))
ENDIF
312 CONTINUE
DO 822 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
F(II,JJ,0)=F(II,JJ,0)-FL(II,JJ,0)
F(II,JJ,1)=F(II,JJ,1)-FL(II,JJ,1)
ENDIF
822 CONTINUE
DO 823 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
OV(II,JJ)=(MXM(II,JJ)-W(II,JJ))/(-PN(F(II,JJ,1))+ &
PP(F(II,JJ,0))+EP)
UN(II,JJ)=(W(II,JJ)-MN(II,JJ))/(PP(F(II,JJ,1))- &
PN(F(II,JJ,0))+EP)
ENDIF
823 CONTINUE
DO 824 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
F(II,JJ,0)=PP(F(II,JJ,0))*AMIN1(1.,OV(II,JJ))+ &
PN(F(II,JJ,0))*AMIN1(1.,UN(II,JJ))
F(II,JJ,1)=PP(F(II,JJ,1))*AMIN1(1.,UN(II,JJ))+ &
PN(F(II,JJ,1))*AMIN1(1.,OV(II,JJ))
ENDIF
824 CONTINUE
DO 825 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
Y(II,JJ,0)=W(II,JJ)-(F(II,JJ,1)-F(II,JJ,0))
ENDIF
825 CONTINUE
DO 361 II=N1STAR,N1END
IF ( icmask(II,JJ) ) Z(II,JJ,J)=Y(II,JJ,0)
361 CONTINUE
!
! END IF FIRST J LOOP
!
8000 CONTINUE
50 CONTINUE
DO 911 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
FL(II,JJ,0)=DONOR(Z(II,JJ,-1),Z(II,JJ,0),XJG(IIM))
FL(II,JJ,1)=DONOR(Z(II,JJ,0),Z(II,JJ,1),XJG(IIM))
ENDIF
911 CONTINUE
DO 912 II=N1STAR,N1END
IF ( icmask(II,JJ) ) W(II,JJ)=Z(II,JJ,0)-(FL(II,JJ,1)-FL(II,JJ,0))
912 CONTINUE
DO 913 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
MXM(II,JJ)=AMAX1(Z(II,JJ,-1),Z(II,JJ,0),Z(II,JJ,1),W(II,JJ))
MN(II,JJ)=AMIN1(Z(II,JJ,-1),Z(II,JJ,0),Z(II,JJ,1),W(II,JJ))
ENDIF
913 CONTINUE
DO 412 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
F(II,JJ,0)= &
TR4(Z(II,JJ,-2),Z(II,JJ,-1),Z(II,JJ,0),Z(II,JJ,1)&
,XJG(IIM))
F(II,JJ,1)= &
TR4(Z(II,JJ,-1),Z(II,JJ,0),Z(II,JJ,1),Z(II,JJ,2), &
XJG(IIM))
ENDIF
412 CONTINUE
DO 922 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
F(II,JJ,0)=F(II,JJ,0)-FL(II,JJ,0)
F(II,JJ,1)=F(II,JJ,1)-FL(II,JJ,1)
ENDIF
922 CONTINUE
DO 923 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
OV(II,JJ)=(MXM(II,JJ)-W(II,JJ))/(-PN(F(II,JJ,1))+ &
PP(F(II,JJ,0))+EP)
UN(II,JJ)=(W(II,JJ)-MN(II,JJ))/(PP(F(II,JJ,1))-PN(F(II,JJ,0))+ &
EP)
ENDIF
923 CONTINUE
DO 924 II=N1STAR,N1END
IF ( icmask(II,JJ) ) THEN
F(II,JJ,0)=PP(F(II,JJ,0))*AMIN1(1.,OV(II,JJ))+PN(F(II,JJ,0)) &
*AMIN1(1.,UN(II,JJ))
F(II,JJ,1)=PP(F(II,JJ,1))*AMIN1(1.,UN(II,JJ))+PN(F(II,JJ,1)) &
*AMIN1(1.,OV(II,JJ))
ENDIF
924 CONTINUE
9000 CONTINUE
DO 925 JJ=N2STAR,N2END
DO 925 II=N1STAR,N1END
IF ( icmask(II,JJ) ) XF(II,JJ,IIM)=W(II,JJ)-(F(II,JJ,1)-F(II,JJ,0))
925 CONTINUE
!
2000 CONTINUE
RETURN
END