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*DECK TRINTR
SUBROUTINE TRINTR (ISPLH,IPTRK,LX,LI4,IHEX,MAT)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Numbering corresponding to a mesh centred finite difference for
* hexagonal geometry (each hexagon represented by 6 triangles).
*
*Copyright:
* Copyright (C) 2002 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): A. Benaboud
*
*Parameters: input
* ISPLH used to compute the number of triangles per hexagon
* (6*(ISPLH-1)**2).
* IPTRK L_TRACK pointer to the tracking information.
* LX number of elements.
* IHEX type of hexagonal boundary condition.
* MAT mixture index assigned to each element.
*
*Parameters: output
* LI4 total number of unknown (variational coefficients) per
* energy group per plan.
*
*-----------------------------------------------------------------------
*
USE GANLIB
*----
* SUBROUTINE ARGUMENTS
*----
TYPE(C_PTR) IPTRK
INTEGER ISPLH,LX,LI4,IHEX,MAT(LX)
*----
* LOCAL VARIABLES
*----
LOGICAL LPAIR
INTEGER IRO(180,2),NBL(20,2)
INTEGER, DIMENSION(:), ALLOCATABLE :: IW,IY,IPO,IXN,IDX,IDY
INTEGER, DIMENSION(:,:), ALLOCATABLE :: IC1,IC2
INTEGER, DIMENSION(:,:,:), ALLOCATABLE :: NIK
DATA NBL /3,3,5,7,7,5,7,9,11,11,9,7,9,11,13,15,15,13,11,9,
> 3,3,7,5,5,7,11,9,7,7,9,11,15,13,11,9,9,11,13,15/
DATA IRO /4,1,2,5,6,3, 13,6,7,1,2,20,14,15,8,9,3,4,21,22,16,
> 17,10,11,5,23,24,18,19,12, 28,17,18,8,9,1,2,39,29,30,19,20,
> 10,11,3,4,48,40,41,31,32,21,22,12,13,5,6,49,50,42,43,33,34,
> 23,24,14,15,7,51,52,44,45,35,36,25,26,16,53,54,46,47,37,38,
> 27, 49,34,35,21,22,10,11,1,2,64,50,51,36,37,23,24,12,13,3,
> 4,77,65,66,52,53,38,39,25,26,14,15,5,6,88,78,79,67,68,54,55,
> 40,41,27,28,16,17,7,8,89,90,80,81,69,70,56,57,42,43,29,30,18,
> 19,9,91,92,82,83,71,72,58,59,44,45,31,32,20,93,94,84,85,73,
> 74,60,61,46,47,33,95,96,86,87,75,76,62,63,48,
> 5,4,1,6,3,2, 21,20,14,13,6,23,22,16,15,8,7,1,24,18,17,10,9,
> 3,2,19,12,11,5,4, 49,48,40,39,29,28,17,51,50,42,41,31,30,19,
> 18,8,53,52,44,43,33,32,21,20,10,9,1,54,46,45,35,34,23,22,12,
> 11,3,2,47,37,36,25,24,14,13,5,4,38,27,26,16,15,7,6,
> 89,88,78,77,65,64,50,49,34,91,90,80,79,67,66,52,51,36,35,21,
> 93,92,82,81,69,68,54,53,38,37,23,22,10,95,94,84,83,71,70,56,
> 55,40,39,25,24,12,11,1,96,86,85,73,72,58,57,42,41,27,26,14,
> 13,3,2,87,75,74,60,59,44,43,29,28,16,15,5,4,76,62,61,46,45,
> 31,30,18,17,7,6,63,48,47,33,32,20,19,9,8/
*----
* SCRATCH STORAGE ALLOCATION
*----
ALLOCATE(IC1(3,2*LX),IC2(3,2*LX*(ISPLH-1)))
ALLOCATE(NIK(3,6*(ISPLH-1)**2,LX))
*
NBE = 0
NC = INT((SQRT(REAL((4*LX-1)/3))+1.)/2.)
L1 = 3*NC - 2
COURS2 = REAL(L1)/2.
LPAIR = (AINT(COURS2).EQ.COURS2)
IF(ISPLH.LE.3) ISAU = 2*(ISPLH-2)
IF(ISPLH.GE.4) ISAU = 6*(ISPLH-3)
ALLOCATE(IW(3*L1),IY(L1))
IW(1) = 2+3*(NC-1)*(NC-2)
DO 10 I = 1,L1
IF(I.LT.L1) IW(I+1) = 2+3*NC*(NC-1)-I
IF(I.LE.NC) IW(I+L1) = 3+(3*NC-5)*(NC-1)-I
IF(I.GT.NC) IW(I+L1) = 2+3*NC*(NC-1)-I+NC
IF(I.LE.2*NC-1) IW(I+2*L1) = 3+(3*NC-4)*(NC-1)-I
IF(I.GT.2*NC-1) IW(I+2*L1) = 2+3*NC*(NC-1)-I+2*NC-1
10 CONTINUE
IF(LPAIR) THEN
DO 20 I = 1,L1/2
IF(I.LE.NC) IY(I) = 1+2*(I-1)
IF(I.GT.NC) IY(I) = IY(NC)
20 CONTINUE
KEL = 1
DO 30 I = L1,L1/2,-1
IF(I.GE.(L1-NC-1)) IY(I) = IY(KEL)
IF(I.LT.(L1-NC-1)) IY(I) = IY(NC)
KEL = KEL + 1
30 CONTINUE
ELSE
DO 40 I = 1,(L1+1)/2
IF(I.LE.NC) IY(I) = 1+2*(I-1)
IF(I.GT.NC) IY(I) = IY(NC)
40 CONTINUE
KEL = 1
DO 50 I = L1,(L1-1)/2,-1
IF(I.GE.(L1-NC-1)) IY(I) = IY(KEL)
IF(I.LT.(L1-NC-1)) IY(I) = IY(NC)
KEL = KEL + 1
50 CONTINUE
ENDIF
ICAS = 3
DO 90 K = 1,ICAS
KEL = 1
DO 80 I = 1,L1
IPAR = IW(I+(K-1)*L1)
NPAR = IPAR
IC1(K,KEL) = NPAR
KEL = KEL + 1
IF(I.GT.(2*NC-1)) GO TO 70
60 NPAR = ABS(NEIGHB(NPAR,K+1,IHEX,LX,P))
IF(NPAR.GT.LX) THEN
IF(I.LT.NC.OR.I.GT.(2*NC-1)) GO TO 80
IF(I.GE.NC.AND.I.LE.(2*NC-1)) NPAR = IPAR
ENDIF
IC1(K,KEL) = NPAR
KEL = KEL + 1
70 NPAR = ABS(NEIGHB(NPAR,K+2,IHEX,LX,P))
IF(NPAR.GT.LX) GO TO 80
IC1(K,KEL) = NPAR
KEL = KEL + 1
GO TO 60
80 CONTINUE
90 CONTINUE
DO 140 K=1,ICAS
IF(ISPLH.EQ.2) THEN
DO 100 JX = 1,2*LX
IC2(K,JX) = IC1(K,JX)
100 CONTINUE
ELSE
JEL = 1
IEL = 1
KEL = 1
MEL = 0
110 IF(IEL.LE.2*LX) THEN
IF(IC1(K,IEL).EQ.MEL) NBE = IY(KEL-1)
IF(IC1(K,IEL).EQ.IW(KEL+(K-1)*L1)) THEN
NBE = IY(KEL)
KEL = KEL + 1
ENDIF
MEL = IC1(K,IEL)
IFOIS = 0
ISAUV = IEL
120 DO 130 LDB = 1,NBE
IC2(K,JEL) = IC1(K,IEL)
JEL = JEL + 1
IEL = IEL + 1
130 CONTINUE
IFOIS = IFOIS + 1
IF(IFOIS.LT.(ISPLH-1)) THEN
IEL = ISAUV
GO TO 120
ENDIF
GO TO 110
ENDIF
ENDIF
140 CONTINUE
DO 152 K=1,ICAS
DO 151 I=1,LX
DO 150 J=1,6*(ISPLH-1)**2
NIK(K,J,I) = 0
150 CONTINUE
151 CONTINUE
152 CONTINUE
ALLOCATE(IPO(LX))
DO 200 K=1,ICAS
DO 160 KK=1,LX
IPO(KK) = 1
160 CONTINUE
IA = 1
IX = 1
ILI = 1
ICOMPT = 1
170 IEL = 1
JCL = 1
IVAL = IC2(K,IX)
180 IF(MAT(IC2(K,IX)).EQ.0) THEN
IX = IX + 1
IEL = IEL + 1
JCL = JCL + 1
IF(JCL.GT.2) JCL = 1
ELSE
IF(ILI+ISAU.GT.20) CALL XABORT('TRINTR: NBL OVERFLOW.')
IDEB = IPO(IC2(K,IX))
IFIN = IPO(IC2(K,IX)) + NBL(ILI+ISAU,JCL) - 1
DO 190 J=IDEB,IFIN
NIK(K,J,IC2(K,IX)) = ICOMPT
ICOMPT = ICOMPT + 1
190 CONTINUE
IPO(IC2(K,IX)) = J
IX = IX + 1
IEL = IEL + 1
JCL = JCL + 1
IF(JCL.GT.2) JCL = 1
ENDIF
IF(IEL.LE.IY(IA)) GO TO 180
IF(IX.GT.2*LX*(ISPLH-1)) GO TO 200
IF(IC2(K,IX).NE.IVAL) IA = IA + 1
ILI = ILI + 1
IF(ILI.LE.(ISPLH-1)) GO TO 170
IF((ILI.GT.(ISPLH-1).AND.ILI.LE.2*(ISPLH-1)).AND.
> (IVAL.EQ.IC2(K,IX))) GO TO 170
ILI = 1
IF(IA.GT.(1+2*(NC-1))) ILI = ISPLH
IF(IX.LE.2*LX*(ISPLH-1)) GO TO 170
200 CONTINUE
LI4 = ICOMPT - 1
DEALLOCATE(IPO,IY,IW)
ALLOCATE(IXN(LI4),IDX(LI4),IDY(LI4))
KEL = 0
ICR = ISAU*(1+2*(ISPLH-2))
DO 220 I = 1, LX
IF(MAT(I).EQ.0) GO TO 220
DO 210 J=1,6*(ISPLH-1)**2
KEL = KEL + 1
IXN(KEL) = NIK(1,J,I)
IDX(NIK(1,J,I))=NIK(2,IRO(J+ICR,1),I)
IDY(NIK(1,J,I))=NIK(3,IRO(J+ICR,2),I)
210 CONTINUE
220 CONTINUE
*
CALL LCMPUT(IPTRK,'IKN',LI4,1,IXN)
CALL LCMPUT(IPTRK,'ILX',LI4,1,IDX)
CALL LCMPUT(IPTRK,'ILY',LI4,1,IDY)
DEALLOCATE(IDY,IDX,IXN)
*----
* SCRATCH STORAGE DEALLOCATION
*----
DEALLOCATE(NIK,IC2,IC1)
RETURN
END
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