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SUBROUTINE CONLOD (XD,YD,ZD,NDP,WK,IWK,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******************************************************************
C* *
C* THIS FILE IS A PACKAGE OF SUPPORT ROUTINES FOR THE ULIB *
C* FILES CONRAN AND CONRAS. SEE THOSE FILES FOR AN *
C* EXPLAINATION OF THE ENTRY POINTS. *
C* *
C******************************************************************
C
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 /CONR13/XVS(50),YVS(50),ICOUNT,SPVAL,SHIELD,
1 SLDPLT
LOGICAL SHIELD,SLDPLT
COMMON /CONR14/LINEAR
LOGICAL LINEAR
COMMON /CONR15/ ISTRNG
CHARACTER*64 ISTRNG
COMMON /CONR16/ FORM
CHARACTER*10 FORM
COMMON /CONR17/ NDASH, IDASH, EDASH
CHARACTER*10 NDASH, IDASH, EDASH
C
C
DIMENSION SCRARR(1)
C
SAVE
C
C IFR - FLAG TO REGISTER FIRST PASS IN Y DIRECTION
C
C LOAD THE SCRATCH SPACE AND CONVEX HULL POINTERS
C ITLOC IS THE LIST OF CONVEX HULL POINTERS RELATIVE TO THE SCARTCH
C SPACE.
C PV IS THE LIST OF CONVEX HULL POINTERS RELATIVE TO USER COORDINATES
C
C INITALIZE THE SPECIAL VALUE FEATURE
C
X = (XED-XST)/2. + XST
Y = (YED-YST)/2. + YST
IF(LINEAR) GO TO 1
SPVAL = CONCOM(X,Y,XD,YD,ZD,NDP,WK,IWK,IT)
GO TO 2
1 SPVAL = CONLCM(X,Y,XD,YD,ZD,NDP,WK,IWK,IT)
2 CONTINUE
C
C INITIALIZE THE SEARCH
C
IYMAX = 0
IFR = 1
JX = 1
X = XST
10 JY = 1
Y = YST
C
C SET HULL POINTERS FOR THIS COLUMN TO NULL
C
ITLOC(JX*2-1) = 0
ITLOC(JX*2) = 0
C
C FLAG START OF COLUMN
C
LOOP = 1
C
C GET INTERPOLATED VALUE
C
20 IF (LINEAR) GO TO 3
RVAL = CONCOM(X,Y,XD,YD,ZD,NDP,WK,IWK,IT)
GO TO 4
3 RVAL = CONLCM(X,Y,XD,YD,ZD,NDP,WK,IWK,IT)
4 CONTINUE
SCRARR(JY+(JX-1)*IYMAX) = RVAL
IF (RVAL.GT.SPVAL) SPVAL = RVAL
C
C IF OUTSIDE CONVEX HULL BRANCH
C
IF (IT.GT.NTNL) GO TO 30
C
C IF OUTSIDE TRIANGLES AND USING LINEAR INTERPLOATION THEN BRANCH
C
IF(LINEAR.AND.IT.GT.NT) GO TO 30
C
C IF FIRST OF COLUMN IN HULL CONTINUE THROUGH
C
IF (LOOP.NE.1) GO TO 40
C
C SET HULL POINTERS
C
PV(JX*2-1) = Y
ITLOC(JX*2-1) = JY
C
C SET FLAG TO LOOK FOR END OF HULL IN COLUMN
C
LOOP = 2
C
C GO FOR NEXT ENTRY
C
GO TO 40
C
C TEST FOR END OF CONVEX HULL ON THIS ROW
C
30 IF (LOOP.NE.2) GO TO 40
C
C END OF HULL SET POINTERS FOR END OF HULL AND FLAG IT VIA LOOP
C
LOOP = 0
ITLOC(JX*2) = JY-1
PV(JX*2) = Y-STPSZ
C
C GET NEXT ELEMENT IN ROW IF NOT OUTSIDE ENCLOSING RECTANGULAR
C BOARDER
C
40 Y = Y+STPSZ
JY = JY+1
IF (Y.LE.YED) GO TO 20
C
C TEST FOR FIRST COLUMN
C
IF (IFR.NE.1) GO TO 50
C
C FIRST COLUMN OVER SET MAX Y VALUES
C
IYMAX = JY-1
YMAX = Y-STPSZ
IFR = 0
C
C IF HULL WENT TO EDGE OF RECTANGULAR BOARDER SET HULL POINTERS HERE
C
50 IF (LOOP.NE.2) GO TO 60
PV(JX*2) = Y-STPSZ
ITLOC(JX*2) = JY-1
C
C END OF COLUMN GET NEXT ONE
C
60 X = X+STPSZ
JX = JX+1
C
C IF NOT END OF WORK CONTINUE WITH NEXT COLUMN
C
IF (X.LE.XED) GO TO 10
C
C END OF WORK SET MAX X VALUES
C
IXMAX = JX-1
XMAX = X-STPSZ
RETURN
END
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