/usr/share/ncarg/tests/tstrml.f is in libncarg-data 6.3.0-6build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | PROGRAM TSTRML
C
C Define the error file, the Fortran unit number, the workstation type,
C and the workstation ID to be used in calls to GKS routines.
C
C PARAMETER (IERRF=6, LUNIT=2, IWTYPE=1, IWKID=1) ! NCGM
C PARAMETER (IERRF=6, LUNIT=2, IWTYPE=8, IWKID=1) ! X Windows
C PARAMETER (IERRF=6, LUNIT=2, IWTYPE=11, IWKID=1) ! PDF
C PARAMETER (IERRF=6, LUNIT=2, IWTYPE=20, IWKID=1) ! PostScript
C
PARAMETER (IERRF=6, LUNIT=2, IWTYPE=1, IWKID=1)
C
C OPEN GKS, OPEN WORKSTATION OF TYPE 1, ACTIVATE WORKSTATION
C
CALL GOPKS (IERRF, ISZDM)
CALL GOPWK (IWKID, LUNIT, IWTYPE)
CALL GACWK (IWKID)
C
C INVOKE DEMO DRIVER
C
CALL STRML(IERR)
C
C DEACTIVATE AND CLOSE WORKSTATION, CLOSE GKS.
C
CALL GDAWK (IWKID)
CALL GCLWK (IWKID)
CALL GCLKS
C
STOP
END
C
SUBROUTINE STRML (IERROR)
C
C PURPOSE To provide a simple demonstration of STRMLN.
C
C USAGE CALL STRML (IERROR)
C
C ARGUMENTS
C
C ON OUTPUT IERROR
C An integer variable
C = 0, if the test was successful,
C = 1, the test was not successful.
C
C I/O If the test is successful, the message
C
C STRMLN TEST EXECUTED--SEE PLOT TO CERTIFY
C
C is printed on unit 6. In addition, 1
C frame is produced on the machine graphics
C device. In order to determine if the test
C was successful, it is necessary to examine
C the plot.
C
C PRECISION Single
C
C LANGUAGE FORTRAN 77
C
C REQUIRED ROUTINES STRMLN
C
C REQUIRED GKS LEVEL 0A
C
C ALGORITHM Routine TSTRML calls routine STRMLN to
C produce a plot which depicts the flow and
C magnitude of a vector field.
C
REAL U(21,25) ,V(21,25) ,WRK(1050)
C
C Specify coordinates for plot titles. The values TX and TY
C define the center of the title string in a 0. to 1. range.
C
DATA TX/.5/,TY/.9765/
C
C Set the grid dimensions.
C
DATA NH,NV/21,25/
C
C Initialize the error parameter.
C
IERROR = 1
C
C Specify horizontal and vertical vector components U and V on
C the rectangular grid.
C
TPIMX = 2.*3.14/REAL(NH)
TPJMX = 2.*3.14/REAL(NV)
DO 20 J=1,NV
DO 10 I=1,NH
U(I,J) = SIN(TPIMX*(REAL(I)-1.))
V(I,J) = SIN(TPJMX*(REAL(J)-1.))
10 CONTINUE
20 CONTINUE
C
C Select normalization transformation 0.
C
CALL GSELNT (0)
C
C Call PLCHLQ to write the plot title.
C
CALL PLCHLQ (TX,TY,'DEMONSTRATION PLOT FOR ROUTINE STRMLN',16.,
1 0.,0.)
C
C Define normalization transformation 1, and set up log scaling.
C
CALL SET(0.1, 0.9, 0.1, 0.9,1.0, 21., 1.0, 25.,1)
C
C Draw the plot perimeter.
C
CALL PERIM(1,0,1,0)
C
C Call STRMLN for vector field streamlines plot.
C
CALL STRMLN (U,V,WRK,NH,NH,NV,1,IER)
C
CALL FRAME
C
IERROR = 0
WRITE (6,1001)
RETURN
C
1001 FORMAT (' STRMLN TEST EXECUTED--SEE PLOT TO CERTIFY')
C
END
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