1 |
#include "EXF_OPTIONS.h" |
2 |
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
3 |
C Flux Coupler using C |
4 |
C Bilinear interpolation of forcing fields C |
5 |
C C |
6 |
C B. Cheng (12/2002) C |
7 |
C C |
8 |
C added Bicubic (bnc 1/2003) C |
9 |
C C |
10 |
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
11 |
|
12 |
SUBROUTINE exf_interp_read( |
13 |
I infile, |
14 |
I filePrec, |
15 |
O arrayin, |
16 |
I irecord, xG, yG, |
17 |
I lon_0, lon_inc, |
18 |
I lat_0, lat_inc, |
19 |
I nx_in, ny_in, method, mythid) |
20 |
|
21 |
implicit none |
22 |
|
23 |
C infile = name of the input file (direct access binary) |
24 |
C filePrec = file precicision (currently not used, assumes real*4) |
25 |
C arrout = output arrays (different for each processor) |
26 |
C irecord = record number in global file |
27 |
C xG,yG = coordinates for output grid |
28 |
C lon_0, lat_0 = lon and lat of sw corner of global input grid |
29 |
C lon_inc = scalar x-grid increment |
30 |
C lat_inc = vector y-grid increments |
31 |
C nx_in, ny_in = input x-grid and y-grid size |
32 |
C method = 1 for bilinear 2 for bicubic |
33 |
C mythid = thread id |
34 |
C |
35 |
|
36 |
#include "SIZE.h" |
37 |
#include "EEPARAMS.h" |
38 |
#ifdef ALLOW_USE_MPI |
39 |
# include "EESUPPORT.h" |
40 |
#endif /* ALLOW_USE_MPI */ |
41 |
#include "PARAMS.h" |
42 |
|
43 |
C subroutine variables |
44 |
character*(*) infile |
45 |
integer filePrec, irecord, nx_in, ny_in |
46 |
real*4 arrayin(-1:nx_in+2 , -1:ny_in+2) |
47 |
_RS xG (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
48 |
_RS yG (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
49 |
_RL lon_0, lon_inc |
50 |
_RL lat_0, lat_inc(ny_in-1) |
51 |
integer method, mythid |
52 |
|
53 |
C Functions |
54 |
integer MDS_RECLEN |
55 |
|
56 |
C local variables |
57 |
integer ierr, length_of_rec |
58 |
real*8 ne_fac,nw_fac,se_fac,sw_fac |
59 |
integer e_ind(snx,sny),w_ind(snx,sny) |
60 |
integer n_ind(snx,sny),s_ind(snx,sny) |
61 |
real*8 px_ind(4), py_ind(4), ew_val(4) |
62 |
external lagran |
63 |
real*8 lagran |
64 |
integer i, j, k, l, js, bi, bj, sp, interp_unit |
65 |
real*4 global(nx_in,ny_in) |
66 |
|
67 |
_BEGIN_MASTER( myThid ) |
68 |
|
69 |
C check input arguments |
70 |
if ( .NOT. (filePrec .EQ. 32) ) |
71 |
& stop 'stop in exf_interp.F: value of filePrec not allowed' |
72 |
|
73 |
C read in input data |
74 |
#ifdef ALLOW_USE_MPI |
75 |
if (useSingleCPUIO) then |
76 |
|
77 |
C master thread of process 0, only, opens a global file |
78 |
IF( mpiMyId .EQ. 0 ) THEN |
79 |
call mdsfindunit( interp_unit, mythid) |
80 |
length_of_rec=MDS_RECLEN( filePrec, nx_in*ny_in, mythid ) |
81 |
open(interp_unit,file=infile,status='old',access='direct', |
82 |
& recl=length_of_rec) |
83 |
read(interp_unit,rec=irecord) |
84 |
& ((global(i,j),i=1,nx_in),j=1,ny_in) |
85 |
close(interp_unit) |
86 |
ENDIF |
87 |
|
88 |
C broadcast to all processes |
89 |
call MPI_BCAST(global,nx_in*ny_in,MPI_REAL, |
90 |
& 0,MPI_COMM_MODEL,ierr) |
91 |
do j=1,ny_in |
92 |
do i=1,nx_in |
93 |
arrayin(i,j)=global(i,j) |
94 |
enddo |
95 |
enddo |
96 |
|
97 |
else |
98 |
#endif /* ALLOW_USE_MPI */ |
99 |
|
100 |
call mdsfindunit( interp_unit, mythid) |
101 |
length_of_rec=MDS_RECLEN( filePrec, nx_in*ny_in, mythid ) |
102 |
open(interp_unit,file=infile,status='old',access='direct', |
103 |
& recl=length_of_rec) |
104 |
read(interp_unit,rec=irecord) |
105 |
& ((arrayin(i,j),i=1,nx_in),j=1,ny_in) |
106 |
close(interp_unit) |
107 |
|
108 |
#ifdef ALLOW_USE_MPI |
109 |
endif |
110 |
#endif /* ALLOW_USE_MPI */ |
111 |
|
112 |
#ifdef _BYTESWAPIO |
113 |
call MDS_BYTESWAPR4((nx_in+4)*(ny_in+4), arrayin ) |
114 |
#endif /* _BYTESWAPIO */ |
115 |
|
116 |
_END_MASTER( myThid ) |
117 |
|
118 |
END |