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|
SUBROUTINE CONDRW (SCRARR)
C
C +-----------------------------------------------------------------+
C | |
C | Copyright (C) 1986 by UCAR |
C | University Corporation for Atmospheric Research |
C | All Rights Reserved |
C | |
C | NCARGRAPHICS Version 1.00 |
C | |
C +-----------------------------------------------------------------+
C
C
C
C DRAW ALL CONTOURS AT THIS LEVEL
C IF NOT EXTRAPOLATING
C SEARCH CONVEX HULL FOR CONTOURS INTERSECTING IT AND DRAW THEM
C SEARCH INTERIOR AND DRAW ALL REMAINING UNDRAWN CONTOURS
C
C IF EXTRAPOLATING
C SEARCH FROM X START TO X END AND Y START TO Y END FOR ALL
C CONTOURS AT THIS LEVEL
C
C INPUT
C SCRARR SCRATCH ARRAY USED FOR FAST CONTOURING
C VIA COMMON BLOCKS BELOW
C CONV-THE CURRENT CONTOUR LEVEL
C ITLOC-THE CONVEX HULL BOUNDRIES RELATIVE TO THE SCRATCH
C ARRAY, SCRARR
C PV-REAL Y COOORDINATES OF THE CONVEX HULL RELATIVE TO THE
C USERS COORDINATE SPACE
C IXMAX,IYMAX-MAXINUM X AND Y COORDINATES RELATIVE TO THE
C SCRATCH ARRAY, SCRARR
C XMAX,YMAX-MAXIMUM X AND Y COORDINATES RELATIVE TO USERS
C COORDINATE SPACE
C
C OUTPUT
C CONTOUR LINES OUTPUT TO PLOTTER FILE
C
C NOTE
C THIS ROUTINE WILL DETECT AND CORRECT FOR CONRAN ERROR 9
C
DIMENSION SCRARR(1)
C
C
COMMON /CONRA1/ CL(30) ,NCL ,OLDZ ,PV(210) ,
1 FINC ,HI ,FLO
COMMON /CONRA2/ REPEAT ,EXTRAP ,PER ,MESS ,
1 ISCALE ,LOOK ,PLDVLS ,GRD ,
2 CINC ,CHILO ,CON ,LABON ,
3 PMIMX ,SCALE ,FRADV ,EXTRI ,
4 BPSIZ ,LISTOP
COMMON /CONRA3/ IREC
COMMON /CONRA4/ NCP ,NCPSZ
COMMON /CONRA5/ NIT ,ITIPV
COMMON /CONRA6/ XST ,YST ,XED ,YED ,
1 STPSZ ,IGRAD ,IG ,XRG ,
2 YRG ,BORD ,PXST ,PYST ,
3 PXED ,PYED ,ITICK
COMMON /CONRA7/ TITLE ,ICNT ,ITLSIZ
COMMON /CONRA8/ IHIGH ,INMAJ ,INLAB ,INDAT ,
1 LEN ,IFMT ,LEND ,
2 IFMTD ,ISIZEP ,INMIN
COMMON /CONRA9/ ICOORD(500), NP ,MXXY ,TR ,
1 BR ,TL ,BL ,CONV ,
2 XN ,YN ,ITLL ,IBLL ,
3 ITRL ,IBRL ,XC ,YC ,
4 ITLOC(210) ,JX ,JY ,ILOC ,
5 ISHFCT ,XO ,YO ,IOC ,NC
COMMON /CONR10/ NT ,NL ,NTNL ,JWIPT ,
1 JWIWL ,JWIWP ,JWIPL ,IPR ,
2 ITPV
COMMON /CONR11/ NREP ,NCRT ,ISIZEL ,
1 MINGAP ,ISIZEM ,
2 TENS
COMMON /CONR12/ IXMAX ,IYMAX ,XMAX ,YMAX
LOGICAL REPEAT ,EXTRAP ,PER ,MESS ,
1 LOOK ,PLDVLS ,GRD ,LABON ,
2 PMIMX ,FRADV ,EXTRI ,CINC ,
3 TITLE ,LISTOP ,CHILO ,CON
COMMON /CONR15/ ISTRNG
CHARACTER*64 ISTRNG
COMMON /CONR16/ FORM
CHARACTER*10 FORM
COMMON /CONR17/ NDASH, IDASH, EDASH
CHARACTER*10 NDASH, IDASH, EDASH
C
C
SAVE
C
C
C FLAGS TO ALLOW COMPRESSION OF CONTOUR STORAGE IF IT IS EXAUSTED
C
DATA ICOMP,NOCOMP/1,0/
C
C STATEMENT FUNCTION TO MAKE ARRAY ACCESS SEEM LIKE MATRIX ACCESS
C
SCRTCH(IXX,IYY) = SCRARR(IYY+(IXX-1)*IYMAX)
C
C CLEAR THE CONTOUR STORAGE LIST
C
NP = 0
C
C SCAN X BOARDERS FOR INTERSECTIONS
C
JX = 2
ICASE = 1
X = XST+STPSZ
C
C IF NOT EXTRAPOLATING BRANCH
C
10 IF (.NOT.EXTRAP) GO TO 20
JY = 2
JYE = IYMAX
Y = YST+STPSZ
GO TO 30
C
C NOT EXTRAPOLATING
C
20 JY = ITLOC(JX*2-1)
IF (JY.EQ.0) GO TO 60
JYE = ITLOC(JX*2)+1
IF (JYE.GT.IYMAX) JYE = IYMAX
Y = PV(JX*2-1)
IF (JY.GE.2) GO TO 30
JY = 2
Y = YST+STPSZ
30 TL = SCRTCH(JX-1,JY-1)
BL = SCRTCH(JX,JY-1)
40 TR = SCRTCH(JX-1,JY)
BR = SCRTCH(JX,JY)
CALL CONGEN (X,Y,NOCOMP,SCRARR,ICASE)
C
C TEST IF CONTOUR STORAGE EXAUSTED
C
IF (NERRO(NERR).NE.10) GO TO 50
CALL EPRIN
CALL ERROF
RETURN
C
C MOVE TO NEW CELL
C
50 TL = TR
BL = BR
JY = JY+1
Y = Y+STPSZ
IF (JY.LE.JYE) GO TO 40
60 IF (JX.EQ.IXMAX) GO TO 70
JX = IXMAX
ICASE = 3
X = XMAX
GO TO 10
C
C SCAN Y BOARDERS
C
70 IPOS = 1
ICASE = 4
80 JX = 3
X = XST+STPSZ+STPSZ
C
C IF NOT EXTRAPOLATING BRANCH
C
90 IF (.NOT.EXTRAP) GO TO 100
JY = 2
Y = YST+STPSZ
IF (IPOS.NE.0) GO TO 110
JY = IYMAX
Y = YED
GO TO 110
C
C NOT EXTRAPOLATING
C
100 JY = ITLOC(JX*2 - IPOS )
IF (JY.EQ.0) GO TO 120
JY = JY + IPOS
Y = PV(JX*2 - IPOS) + STPSZ*(1*IPOS)
110 TL = SCRTCH(JX-1,JY-1)
BL = SCRTCH(JX,JY-1)
TR = SCRTCH(JX-1,JY)
BR = SCRTCH(JX,JY)
CALL CONGEN (X,Y,NOCOMP,SCRARR,ICASE)
C
C TEST IF CONTOUR STORAGE EXAUSTED
C
IF (NERRO(NERR).NE.10) GO TO 120
CALL EPRIN
CALL ERROF
RETURN
C
C MOVE TO NEW CELL
C
120 JX = JX+1
X = X+STPSZ
IF (JX.LE.IXMAX-1) GO TO 90
IF (IPOS.EQ.0) GO TO 130
IPOS = 0
ICASE = 2
GO TO 80
C
C BOARDER SEARCH DONE CONTOUR INTERIOR
C
C INITIALIZE THE SEARCH
C
130 JX = 3
ICASE = 0
X = XST+STPSZ+STPSZ
JXE = IXMAX-1
C
C IF EXTRAPOLATING GO FROM BORDER TO BORDER
C
140 IF (.NOT.EXTRAP) GO TO 150
JY = 3
JYE = IYMAX-1
Y = YST+STPSZ+STPSZ
GO TO 160
C
C NOT EXTRAPOLATING STAY IN HULL
C
150 JY = ITLOC(JX*2 - 1)+2
IF (JY.EQ.2) GO TO 190
JYE = ITLOC(JX*2)-1
Y = PV(JX*2 - 1)+STPSZ+STPSZ
C
160 IF (JY.GT.JYE) GO TO 190
TL = SCRTCH(JX-1,JY-1)
BL = SCRTCH(JX,JY-1)
170 TR = SCRTCH(JX-1,JY)
BR = SCRTCH(JX,JY)
CALL CONGEN (X,Y,ICOMP,SCRARR,ICASE)
C
C TEST IF CONTOUR STORAGE EXAUSTED
C
IF (NERRO(NERR).NE.10) GO TO 180
CALL EPRIN
CALL ERROF
RETURN
C
C MOVE TO NEW CELL
C
180 JY = JY+1
Y = Y+STPSZ
TL = TR
BL = BR
IF (JY.LE.JYE) GO TO 170
C
C PROCESS EACH ROW OF INTERIOR
C
190 X = X+STPSZ
JX = JX+1
IF (JX.LE.JXE) GO TO 140
C
RETURN
END
|
