/usr/share/ncarg/tests/tconpa.f is in libncarg-data 6.1.2-7.
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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 CONPA(IERR,IWKID)
C
C DEACTIVATE AND CLOSE WORKSTATION, CLOSE GKS.
C
CALL GDAWK (IWKID)
CALL GCLWK (IWKID)
CALL GCLKS
C
STOP
END
C
SUBROUTINE CONPA (IERR,IWKID)
C
C PURPOSE To provide a simple demonstration of the use of
C CONPACK to contour regularly-spaced rectangular
C data.
C
C USAGE CALL CONPA (IERR)
C
C ARGUMENTS (OUTPUT) IERR
C
C An integer variable
C = 0, if the test was successful,
C = 1, otherwise
C
C I/O If the test is successful, the message "CONPACK
C TEST EXECUTED--SEE PLOTS TO CERTIFY" is printed
C on unit 6. In addition, three frames are drawn
C on the graphics device. In order to determine
C if the test was successful, it is necessary to
C examine these frames.
C
C PRECISION Single.
C
C LANGUAGE FORTRAN 77.
C
C REQUIRED ROUTINES The AREAS, CONPACK, LABELBAR, SOFTFILL, and
C SPPS packages.
C
C REQUIRED GKS LEVEL 0A.
C
C ALGORITHM The function
C
C Z(X,Y) = X + Y + 1./((X-.1)**2+Y**2+.09)
C -1./((X+.1)**2+Y**2+.09)
C
C for X = -1. to 1. in increments of .1, and Y =
C -1.2 to 1.2 in increments of .1, is computed.
C Then, entries CPEZCT and CPCNRC are called to
C generate contour plots of Z.
C
C ZDAT contains the values to be plotted.
C
DIMENSION ZDAT(21,25)
C
C Declare an array to hold the GKS "aspect source flags".
C
DIMENSION IASF(13)
C
C Define real and integer work spaces and an area-map array.
C
DIMENSION RWRK(1000),IWRK(1000),IAMA(20000)
C
C Define arrays for use by ARSCAM.
C
DIMENSION XCRA(1000),YCRA(1000),IAIA(10),IGIA(10)
C
C Declare arrays to hold the list of indices and the list of labels
C required by the label-bar routine.
C
DIMENSION LIND(10)
CHARACTER*2 LLBS(9)
C
C Declare the routine which will color the areas.
C
EXTERNAL CPCOLR
C
C Initialize the values in the aspect-source-flag array.
C
DATA IASF / 13*1 /
C
C Define the list of indices and the list of labels required by the
C label-bar routine.
C
DATA LIND / 6,7,8,9,10,11,12,13,14,15 /
C
DATA LLBS / '-4','-3','-2','-1',' 0',' 1',' 2',' 3',' 4' /
C
C Initialize the error parameter.
C
IERR = 0
C
C Fill the 2D array to be plotted.
C
DO 102 I=1,21
X=.1*REAL(I-11)
DO 101 J=1,25
Y = .1*REAL(J-13)
ZDAT(I,J)=X+Y+1./((X-.10)**2+Y**2+.09)
+ -1./((X+.10)**2+Y**2+.09)
101 CONTINUE
102 CONTINUE
C
C Frame 1 -- CPEZCT.
C
C The routine CPEZCT requires only the array name and dimensions.
C
CALL SET (0.,1.,0.,1.,0.,1.,0.,1.,1)
CALL WTSTR (.5,.9765,
+ 'DEMONSTRATION PLOT FOR CONPACK ROUTINE CPEZCT',2,0,0)
C
CALL CPEZCT (ZDAT,21,25)
C
C Frame 2 -- CPCNRC.
C
C The routine CPCNRC is called just like the old routine CONREC.
C
C In this example, the lowest contour level (-4.5), the highest contour
C level (4.5), and the increment between contour levels (0.3) are set.
C Line labels are positioned using the penalty scheme and the smoother
C is turned on.
C
CALL SET (0.,1.,0.,1.,0.,1.,0.,1.,1)
CALL WTSTR (.5,.9765,
+ 'DEMONSTRATION PLOT FOR CONPACK ROUTINE CPCNRC',2,0,0)
C
CALL CPSETI ('LLP - LINE LABEL POSITIONING',3)
CALL CPSETR ('T2D - TENSION ON 2D SPLINES',3.6)
CALL CPCNRC (ZDAT,21,21,25,-4.5,4.5,.3,0,0,0)
CALL FRAME
C
C Frame 3 - A solid-filled contour plot.
C
C Set all the GKS aspect source flags to "individual".
C
CALL GSASF (IASF)
C
C Force solid fill.
C
CALL GSFAIS (1)
C
C Turn off the clipping indicator.
C
CALL GSCLIP (0)
C
C Define a bunch of color indices.
C
CALL CPCLRS(IWKID)
C
C Put a label at the top of the frame.
C
CALL SET (0.,1.,0.,1.,0.,1.,0.,1.,1)
CALL WTSTR (.5,.9765,
+ 'DEMONSTRATION PLOT FOR BASIC CONPACK ROUTINES',2,0,0)
C
C Force the plot into the left side of the frame.
C
CALL CPSETR ('VPR - VIEWPORT RIGHT',.75)
C
C Force the use of exactly 9 contour levels, specify those levels, and
C define exactly what is to be done at each level.
C
CALL CPSETI ('CLS - CONTOUR LEVEL SELECTOR',0)
CALL CPSETI ('NCL - NUMBER OF CONTOUR LEVELS',9)
C
DO 103 I=1,9
CALL CPSETI ('PAI - PARAMETER ARRAY INDEX',I)
CALL CPSETR ('CLV - CONTOUR LEVEL',REAL(I-5))
CALL CPSETI ('CLU - CONTOUR LEVEL USE',1)
CALL CPSETI ('AIB - AREA IDENTIFIER BELOW LEVEL',I)
CALL CPSETI ('AIA - AREA IDENTIFIER ABOVE LEVEL',I+1)
103 CONTINUE
C
C Initialize the drawing of the contour plot.
C
CALL CPRECT (ZDAT,21,21,25,RWRK,1000,IWRK,1000)
C
C Initialize the area map and put the contour lines into it.
C
CALL ARINAM (IAMA,20000)
CALL CPCLAM (ZDAT,RWRK,IWRK,IAMA)
C
C Color the map.
C
CALL ARSCAM (IAMA,XCRA,YCRA,1000,IAIA,IGIA,10,CPCOLR)
C
C Put black contour lines over the colored map.
C
CALL GSPLCI (0)
CALL CPCLDR (ZDAT,RWRK,IWRK)
CALL GSPLCI (1)
C
C Draw a color bar for the plot.
C
CALL LBSETI ('CBL - COLOR OF BOX LINES',2)
CALL PCSETR ('CS - CONSTANT SPACING FLAG',1.25)
CALL LBLBAR (1,.80,.95,.05,.95,10,.5,1.,LIND,0,LLBS,9,1)
C
C Advance the frame.
C
CALL FRAME
C
C Log a successful-completion message and return to the caller.
C
WRITE (6,1001)
C
RETURN
C
1001 FORMAT (' CONPACK TEST EXECUTED--SEE PLOTS TO CERTIFY')
C
END
SUBROUTINE CPCLRS(IWKID)
C
C Define a set of RGB color triples for colors 1 through 15.
C
DIMENSION RGBV(3,15)
C
C Define the RGB color triples needed below.
C
DATA RGBV / 1.00 , 1.00 , 1.00 ,
+ 0.70 , 0.70 , 0.70 ,
+ 0.75 , 0.50 , 1.00 ,
+ 0.50 , 0.00 , 1.00 ,
+ 0.00 , 0.00 , 1.00 ,
+ 0.00 , 0.50 , 1.00 ,
+ 0.00 , 1.00 , 1.00 ,
+ 0.00 , 1.00 , 0.60 ,
+ 0.00 , 1.00 , 0.00 ,
+ 0.70 , 1.00 , 0.00 ,
+ 1.00 , 1.00 , 0.00 ,
+ 1.00 , 0.75 , 0.00 ,
+ 1.00 , 0.38 , 0.38 ,
+ 1.00 , 0.00 , 0.38 ,
+ 1.00 , 0.00 , 0.00 /
C
C Define 16 different color indices, for indices 0 through 15. The
C color corresponding to index 0 is black and the color corresponding
C to index 1 is white.
C
CALL GSCR (IWKID,0,0.,0.,0.)
C
DO 101 I=1,15
CALL GSCR (IWKID,I,RGBV(1,I),RGBV(2,I),RGBV(3,I))
101 CONTINUE
C
C Done.
C
RETURN
C
END
SUBROUTINE CPCOLR (XCRA,YCRA,NCRA,IAIA,IGIA,NAIA)
C
DIMENSION XCRA(*),YCRA(*),IAIA(*),IGIA(*)
C
C The arrays XCRA and YCRA, for indices 1 to NCRA, contain the X and Y
C coordinates of points defining a polygon. The area identifiers in
C the array IAIA, each with an associated group identifier in the array
C IGIA, tell us whether the polygon is to be color-filled or not.
C
C
C Assume the polygon will be filled until we find otherwise.
C
IFLL=1
C
C If any of the area identifiers is negative, don't fill the polygon.
C
DO 101 I=1,NAIA
IF (IAIA(I).LT.0) IFLL=0
101 CONTINUE
C
C Otherwise, fill the polygon in the color implied by its area
C identifier relative to edge group 3 (the contour-line group).
C
IF (IFLL.NE.0) THEN
IFLL=0
DO 102 I=1,NAIA
IF (IGIA(I).EQ.3) IFLL=IAIA(I)
102 CONTINUE
IF (IFLL.GE.1.AND.IFLL.LE.10) THEN
CALL GSFACI (IFLL+5)
CALL GFA (NCRA-1,XCRA,YCRA)
END IF
END IF
C
C Done.
C
RETURN
C
END
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