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*DECK XCGROD
SUBROUTINE XCGROD(NRT,MSROD,NRODS,RODS,MATROD,RODR)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Check geometry and reorder rod clusters if necessary.
*
*Copyright:
* Copyright (C) 1994 Ecole Polytechnique de Montreal
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version
*
*Author(s): G. Marleau
*
*Parameters: input
* NRT number of rod types.
* MSROD maximum number of subrods per rods.
*
*Parameters: input/output
* NRODS integer description of rod of a given type:
* NRODS(1,IRT) = number of rod;
* NRODS(2,IRT) = number of subrods in rod;
* NRODS(3,IRT) = first concentric region.
* RODS real description of rod of a given type:
* RODS(1,IRT) = rod center radius;
* RODS(2,IRT) = angular position of first rod.
* MATROD type of material for each subrod.
* RODR subrod radius.
*
*----------------------------------------------------------------------
*
INTEGER IOUT
REAL PI
PARAMETER (IOUT=6,PI=3.1415926535898)
INTEGER NRT,NRODS(3,NRT),MATROD(MSROD,NRT)
REAL RODS(2,NRT),RODR(MSROD,NRT)
INTEGER, ALLOCATABLE, DIMENSION(:) :: IORD
*----
* SCRATCH STORAGE ALLOCATION
* IORD : NEW ROD CLUSTER ORDER I(NRT)
*----
ALLOCATE(IORD(NRT))
*----
* CLASSIFY ROD CLUSTER BY INCREASING DISTANCE OF CENTER AND ANGLE
*----
DO 100 IRT=1,NRT
IORD(IRT)=IRT
100 CONTINUE
DO 110 IRT=2,NRT
REFR=RODS(1,IRT)
REFA=RODS(2,IRT)
IPOS=IORD(IRT)
DO 111 JRT=IRT-1,1,-1
KRT=JRT
IF(RODS(1,JRT).GT.REFR) THEN
RODS(1,JRT+1)=RODS(1,JRT)
RODS(2,JRT+1)=RODS(2,JRT)
IORD(JRT+1)=IORD(JRT)
ELSE IF(RODS(1,JRT).EQ.REFR) THEN
IPOS=-IPOS
GO TO 112
ELSE
GO TO 112
ENDIF
111 CONTINUE
KRT=0
112 CONTINUE
RODS(1,KRT+1)=REFR
RODS(2,KRT+1)=REFA
IORD(KRT+1)=IPOS
IF(IPOS.LT.0) THEN
DO 113 JRT=KRT,1,-1
LRT=JRT
IF((RODS(2,JRT).GT.REFA).AND.
> (RODS(1,JRT).EQ.REFR)) THEN
RODS(1,JRT+1)=RODS(1,JRT)
RODS(2,JRT+1)=RODS(2,JRT)
IORD(JRT+1)=IORD(JRT)
ELSE
GO TO 114
ENDIF
113 CONTINUE
LRT=0
114 CONTINUE
RODS(1,LRT+1)=REFR
RODS(2,LRT+1)=REFA
IORD(LRT+1)=-IPOS
ENDIF
110 CONTINUE
*----
* REORDER REMAINING VECTORS NRODS,MATROD,RODR
*----
DO 140 IRT=1,NRT
JRT=IORD(IRT)
IF(JRT.NE.IRT) THEN
DO 141 IX=1,3
NNR=NRODS(IX,IRT)
NRODS(IX,IRT)=NRODS(IX,JRT)
NRODS(IX,JRT)=NNR
141 CONTINUE
DO 142 IS=1,MSROD
MATT=MATROD(IS,IRT)
MATROD(IS,IRT)=MATROD(IS,JRT)
MATROD(IS,JRT)=MATT
RROD=RODR(IS,IRT)
RODR(IS,IRT)=RODR(IS,JRT)
RODR(IS,JRT)=RROD
142 CONTINUE
DO 143 KRT=IRT+1,NRT
IF(IORD(KRT).EQ.IRT) THEN
IORD(KRT)=JRT
IORD(IRT)=IRT
GO TO 144
ENDIF
143 CONTINUE
144 CONTINUE
ENDIF
140 CONTINUE
*----
* FIND IF ROD OVERLAPP
*----
DO 150 IRT=1,NRT
NRDB=NRODS(1,IRT)
NSBRB=NRODS(2,IRT)
RODRB=RODR(NSBRB,IRT)
RODRB2=RODRB*RODRB
RDPB=RODS(1,IRT)
XBOT=RDPB-RODRB
DANGB=2.*PI/FLOAT(NRDB)
ANGB=RODS(2,IRT)
*----
* CHECK FOR ROD OVERLAPP INSIDE EACH CLUSTER
*----
IF(NRDB.GT.1) THEN
IF(RODRB.GT.RDPB) THEN
WRITE(IOUT,'(1X,24HROD OVERLAP IN CLUSTER =,I10)') IRT
CALL XABORT('XCGROD: ROD OVERLAP IN A CLUSTER')
ELSE
ANGMIN=2.*ASIN(RODRB/RDPB)
IF(DANGB.LE.ANGMIN) THEN
WRITE(IOUT,'(1X,24HROD OVERLAP IN CLUSTER =,I10)') IRT
CALL XABORT('XCGROD: ROD OVERLAP IN A CLUSTER')
ENDIF
ENDIF
ENDIF
*----
* CHECK FOR ROD OVERLAPP BETWEEN DIFFERENT CLUSTERS
*----
DO 151 JRT=IRT-1,1,-1
NRDT=NRODS(1,JRT)
NSBRT=NRODS(2,JRT)
RODRT=RODR(NSBRT,JRT)
RODRT2=RODRT*RODRT
RDPT=RODS(1,JRT)
XTOP=RDPT+RODRT
DANGT=2.*PI/FLOAT(NRDT)
ANGT=RODS(2,JRT)
*----
* NO OVERLAPP
*----
IF(XTOP.LT.XBOT) GO TO 152
*----
* SOME OVERLAPP POSSIBLE TEST FOR INTERSECTION
*----
ANG1=ANGB
DO 160 IA1=1,NRDB
*----
* FIND POSITION OF ROD (X0,Y0)
*----
X01=RDPB*COS(ANG1)
Y01=RDPB*SIN(ANG1)
RRX=RODRB2-X01*X01
RRY=RODRB2-Y01*Y01
XY=X01*Y01
RR1=(RRX-Y01*Y01)
ANG2=ANGT
DO 161 IA2=1,NRDT
X02=RDPT*COS(ANG2)
Y02=RDPT*SIN(ANG2)
RR2=(RODRT2-X02*X02-Y02*Y02)
*----
* CHECK FOR ROD INSIDE ROD
*----
DELX=X02-X01
DELY=Y02-Y01
DIST=SQRT(DELX**2+DELY**2)
IF(DIST.LT.RODRT+RODRB) THEN
WRITE(IOUT,'(1X,25HROD OVERLAP IN CLUSTERS =,2I10)')
> IRT,JRT
CALL XABORT('XCGROD: ROD OVERLAP IN 2 CLUSTERS')
ENDIF
*----
* FIND IF CIRCLES
* (X-X01)**2+(Y-Y01)**2=RODRB*2
* (X-X02)**2+(Y-Y02)**2=RODRT*2
* INTERSECT
*----
IF(X02.NE.X01) THEN
CCR=1./DELX
BBR=-DELY*CCR
AAR=0.5*CCR*(RR1-RR2)
ARGSQ=AAR*(2.*X01-2.*BBR*Y01-AAR)
> +BBR*(BBR*RRY+2.*XY)+RRX
ELSE
CCR=1./DELY
BBR=-DELX*CCR
AAR=0.5*CCR*(RR1-RR2)
ARGSQ=AAR*(2.*Y01-2.*BBR*X01-AAR)
> +BBR*(BBR*RRX+2.*XY)+RRY
ENDIF
IF(ARGSQ.GE.0.0) THEN
WRITE(IOUT,'(1X,25HROD OVERLAP IN CLUSTERS =,2I10)')
> IRT,JRT
CALL XABORT('XCGROD: ROD OVERLAP IN 2 CLUSTERS')
ENDIF
ANG2=ANG2+DANGT
161 CONTINUE
ANG1=ANG1+DANGB
160 CONTINUE
151 CONTINUE
152 CONTINUE
150 CONTINUE
*----
* SCRATCH STORAGE DEALLOCATION
*----
DEALLOCATE(IORD)
*----
* RETURN
*----
RETURN
END
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