summaryrefslogtreecommitdiff
path: root/Dragon/src/XHXTRK.f
blob: 7f6f8aca5798f561c948add8445ba5f844f0b507 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
*DECK XHXTRK
      SUBROUTINE XHXTRK(IPTRK ,IPGEOM,GEONAM,IDISP ,IFTEMP,
     >                  IPRT  ,NDIM  ,ITOPT ,NV    ,NS    ,NANGL ,
     >                  ISYMM ,DENS  ,PCORN ,MXSEG ,ICODE ,TITREC)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Call all routines for the production of tracks for the 
* hexagonal geometry.
*
*Copyright:
* Copyright (C) 1991 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): M. Ouisloumen
*
*Parameters: input
* IPTRK   pointer to the excell tracking.
* IPGEOM  pointer to the geometry.        
* GEONAM  geometry name.                  
* IFTEMP  temporary tracking file.        
* IPRT    print option.                   
* TITREC  title for execution.            
*
*Parameters: input/output
* IDISP   tracking file disposition:
*         = -2 no traking - only analyse geometry
*              then abort (option halt);
*         = -1 modify tracking file;
*         =  0 old tracking file;
*         =  1 new tracking file.
*
*Parameters: output
* NDIM    number of physical dimensions.
* ITOPT   tracking option:
*         = 0 finite;  = 1 cyclic.
* NV      number of physical regions.
* NS      number of outer surface.
* NANGL   number of angles.
* ISYMM   symmetry factor.
* DENS    track density.
* PCORN   corner proximity.
* MXSEG   maximum segment length.
* ICODE   albedo associated with face.
*
*-----------------------------------------------------------------------
*
      USE             GANLIB
      IMPLICIT        NONE
      INTEGER         IOUT,NSTATE
      CHARACTER*6     NAMSBR
      DOUBLE PRECISION PI
      PARAMETER      (IOUT=6,NSTATE=40,PI=3.141592653589793D0,
     >                NAMSBR='XHXTRK')
*----
*  ROUTINE PARAMETERS
*----
      TYPE(C_PTR)     IPTRK,IPGEOM
      INTEGER         IDISP,IFTEMP,IPRT,NDIM,MXSEG,ITOPT,NV,NS,NANGL,
     >                ISYMM,ICODE(6)
      CHARACTER       GEONAM*12,TITREC*72
      REAL            DENS,PCORN
*----
*  LOCAL VARIABLES
*---- 
      INTEGER        KDROPN,KDRCLS
      INTEGER        IFILE,IER
      INTEGER        ISTATE(NSTATE),NCODE(6),IPARAM(NSTATE)
      INTEGER        NEIGHB
      LOGICAL        SECTOR
      REAL           ALBEDO(6),DENUSR,DENUSZ,EXTKOP(NSTATE)
      DOUBLE PRECISION DBLINP,AUX,SINT,SINF,COST,COSF,
     >               SINT1,SINF1,COST1,COSF1
      DOUBLE PRECISION COS1,COS2,COS3,PASY,PASZ,PPASY,PPASZ,
     >               RAYON,POIDS,DZMIN,DZMAX,DSIDE
      INTEGER        NSOUT,ILNLCM,ITPLCM,NSMIN,NSMAX,NCELA,MVOLUM,
     >               MMESH,LINMAX,LTRK,NANGLE,INDLEC,NGLE,NPHI,NTETA,
     >               IQUAD,INDATA,IHEX,LEVEL,NCL,NCOUR,IPLANZ,NCPHY,
     >               NREGIO,LXI,MCODE,IPLANI,NCELAP,IDIM1,IDIM2,
     >               IAUX,IA,KGAUS,IG,JG,JAUX,MAXCYL,I,J,MAXSEC,MMAXS,
     >               NALBG,NSURF,MACP,MTT,MT0,NBLINE,KANG,ICC,ICC1,
     >               ICORN,IFCC1,IXX,IYY,IYY0,NCEL2,IVV,II,IAUXS,
     >               IAUXX,IANG,ISS,ISUR
      REAL           POIDSH,RCUTOF,CUTOFX,DEN,REDATA,SIDE,ZMIN,SQRT3
      CHARACTER      TEDATA*8,COMENT*80
*----
*  ALLOCATABLE ARRAYS
*----
      INTEGER, ALLOCATABLE, DIMENSION(:) :: KEYMRG,MATALB,LATV,ICEL,
     + IPLAN,IFACB,IFFV,ISURB,IVSYM,ISSYM,IMAT,KCORN,IVOIS,MATRT,SURL,
     + IV0
      REAL, ALLOCATABLE, DIMENSION(:) :: VOLSUR,MESH,XGS,WGS,XGS1,
     + WGS1,WW,A1,A2,A3,T0,T1,RAUX
      DOUBLE PRECISION, ALLOCATABLE, DIMENSION(:) :: ANGLES,DENSTY,POP
*----
*  DATA AND COMMONS
*----
      CHARACTER       CSTOP*8,CTISO*8, CTSPC*8,CNOTR*8, CBLAN*8,
     >                CGAUS*8, CEQW*8
      SAVE             CSTOP,CTISO,CTSPC,CNOTR,CBLAN,CGAUS,CEQW
      DATA             CSTOP,CTISO,CTSPC,CNOTR,CBLAN,CGAUS,CEQW
     >              / 'STOP','TISO','TSPC', 'NOTR','    ' ,
     >                'GAUS','EQW' /
      PCORN=0.0
      DENS=0.0
      ISYMM=1
*
** 2.1) TAKE THE ORIGINAL GEOMETRY.
      ISTATE(:NSTATE)=0
      CALL LCMLEN(IPGEOM,'STATE-VECTOR',ILNLCM,ITPLCM)
      IF (ILNLCM .GT. 0 .AND. ILNLCM .LE. NSTATE) THEN
        CALL LCMGET(IPGEOM,'STATE-VECTOR',ISTATE)
      ELSE
        CALL XABORT('XHXTRK: INVALID STATE VECTOR IN GEOMETRY')
      ENDIF
      CALL LCMGET(IPGEOM,'NCODE',NCODE)
      NDIM=2
      IF(ISTATE(5).GT.0) NDIM=3
*
      NSMIN = 0
      NSMAX = 0
      NCELA = 0
      MVOLUM= 0
      MMESH = 0
      LINMAX= 0
      LTRK  = 0
      NANGLE= 0
      DENUSR=10.0
      DENUSZ=10.0
      RCUTOF= 0.0
      CUTOFX= 0.0
      TEDATA= CBLAN
      IQUAD=0
*
** 1) READ ALL USER INPUT.
*
*     READ TRACKING PARAMETERS  LTRK= 0 : NO  TRACKING
*                               LTRK= 1 : ISOTROPIC TRACKING   (TISO)
*                               LTRK= 2 : SPECULAR TRACKING    (TSPC)
      IF( IDISP.GT.0 )THEN
         CALL REDGET( INDLEC, NGLE, DEN, TEDATA, DBLINP)
         IF( INDLEC.NE.3 ) THEN
           CALL XABORT('XHXTRK: TYPE OF INTEGRATION NOT SPECIFIED ')
         ENDIF
         LTRK=1
         IF( TEDATA(1:4).EQ.CSTOP(1:4) ) THEN
*
*  INITIALISATION PAR DEFAUT
*
            NPHI=5
            NTETA=5
            IQUAD=1
            GOTO 55
         ELSEIF( TEDATA(1:4).EQ.CTISO(1:4) ) THEN
            LTRK=1
            IQUAD=2
            NTETA=1
            CALL REDGET( INDLEC, NPHI , DEN, TEDATA, DBLINP)
            IF( INDLEC .EQ. 3 ) THEN
              IF(TEDATA(1:4) .EQ. CGAUS(1:4)) THEN
                IQUAD=1
              ELSE IF(TEDATA(1:3) .NE. CEQW(1:3)) THEN
                CALL XABORT('XHXTRK: INVALID INTEGRATION TYPE')
              ENDIF
              CALL REDGET( INDLEC, NPHI , DEN, TEDATA, DBLINP)
            ELSE IF( INDLEC.EQ.2 ) THEN
              CALL XABORT('XHXTRK: INVALID DATA FOLLOWING TISO ')
            ENDIF
            IF(NDIM .EQ. 3) THEN
              IF(INDLEC .NE. 1) 
     >          CALL XABORT('XHXTRK: NTETA MUST BE INTEGER')
              IF(NPHI .LE. 1) CALL XABORT('XHXTRK: NTETA < 2 ') 
              NTETA=NPHI
              CALL REDGET( INDLEC, NPHI , DENUSR, TEDATA, DBLINP)
            ENDIF
            IF(INDLEC .NE. 1)
     >        CALL XABORT('XHXTRK: NPHI MUST BE INTEGER')
            IF(NPHI .LE. 1) CALL XABORT('XHXTRK: NPHI < 2 ')
            CALL REDGET( INDLEC, NPHI , DENUSR, TEDATA, DBLINP)
            IF (INDLEC .NE. 2) 
     >        CALL XABORT('XHXTRK: DENSITY MUST BE REAL')
            IF(DENUSR .LE. 0.0) CALL XABORT('XHXTRK: DENSITY < 0.0 ')
            IF(NDIM .EQ. 3) THEN
              CALL REDGET( INDLEC, NGLE , DENUSZ, TEDATA, DBLINP)
              IF(INDLEC .NE. 2) 
     >          CALL XABORT('XHXTRK: DENSITY MUST BE REAL')
              IF(DENUSZ .LE. 0.0) CALL XABORT('XHXTRK: DENSITY < 0 ')
            ENDIF
            IF(IQUAD .EQ. 1) THEN
              IF(NTETA .GT. 64 .OR. NPHI .GT. 64) THEN
                 CALL XABORT('XHXTRK: NANGLE IS GREATER THAN 64.')
              ENDIF
            ENDIF
            IF(NDIM .EQ. 2)THEN
              NANGLE=NTETA*NPHI*2
            ELSE
              NANGLE=NTETA*NPHI*4
            ENDIF
         ELSEIF( TEDATA(1:4).EQ.CTSPC(1:4) ) THEN
            LTRK  = 2
            CALL XABORT('XHXTRK: *TSPC* NOT AVAILABLE FOR HEXAGONE' )
         ELSEIF( TEDATA(1:4).EQ.CNOTR(1:4) )THEN
            LTRK=0
            GOTO 54
         ELSEIF( TEDATA(1:4).NE.CGAUS(1:4)
     +           .OR.TEDATA(1:4).NE.CEQW(1:4) ) THEN
            CALL XABORT('XHXTRK: CHARACTER EXPECTED ')
         ENDIF
   54    CALL REDGET( INDLEC, INDATA, REDATA, TEDATA, DBLINP)
         IF( INDLEC.NE.3.OR.TEDATA(1:1).NE.';' )THEN
            CALL XABORT( 'XHXTRK: ; IS SUPPOSED TO BE HERE' )
         ENDIF
   55    CONTINUE
      ENDIF
**    EVERYTHING IS NOW READ.
*----
*  SAVE EXCELL SPECIFIC TRACKING INFORMATION.
*----
      ISTATE(:NSTATE)=0
      EXTKOP(:NSTATE)=0.0
      ISTATE(9)=LTRK-1
      ISTATE(11)=NANGLE
      ISTATE(12)=ISYMM
      CALL LCMPUT(IPTRK,'STATE-VECTOR',NSTATE,1,ISTATE)
      EXTKOP(2)=DENUSR
      CALL LCMPUT(IPTRK,'EXCELTRACKOP',NSTATE,2,EXTKOP)
*
** 2) PROCEED TO THE EXACT GEOMETRY TREATMENT.
*
*
*     STUDY TRACKING PARAMETERS. ARE THEY BASICALLY POSSIBLE ?
      IF( IPRT.GT.0 )THEN
         WRITE(IOUT,6000) GEONAM
      ENDIF
* -------------*************************************--------------------
*             /                                         /
*           /  TRAITEMENT DE LA GEOMETRIE HEXAGONALE  /
*         /                                         /
*--------------*************************************--------------------
*
*       DUPLICATE AND UNFOLD THE GEOMETRY.
*
      CALL LCMGET(IPGEOM,'IHEX',IHEX)
      LEVEL= 1
      IF(IHEX.EQ.9) THEN
        IF(NCODE(5) .EQ.  5 .OR. NCODE(6) .EQ.  5 .OR.
     >     NCODE(5) .EQ. 10 .OR. NCODE(6) .EQ. 10) THEN
          NCL=ISTATE(3)
          NCOUR=NINT( (4.+SQRT(1.+4.*FLOAT(NCL-1)/3.)
     +                 +SQRT(1.+4.*FLOAT(NCL-2)/3.))*.25)
          ALLOCATE(LATV(2*NCOUR))
        ENDIF
      ENDIF
      CALL LHXUNH(IPTRK,IPGEOM,GEONAM,MMESH,NCELA,IPLANZ,NCPHY,ICODE,
     +            ALBEDO,NV,NREGIO,NS,SIDE,ISTATE,NSMIN,NSMAX,MVOLUM,
     +            IHEX,LXI,MCODE,IPLANI,LATV)
      CALL LCMSIX(IPTRK,'DATA_DUP',1)
      CALL LCMLEN(IPTRK,'SURL_HEX',ISUR,ITPLCM)
      ALLOCATE(SURL(MAX(1,ISUR)))
      IF(ISUR.GT.0) CALL LCMGET(IPTRK,'SURL_HEX',SURL)
      CALL LCMSIX(IPTRK,' ',2)
*
      NCELAP=NCELA/IPLANZ
      IDIM1=2*NCELA+MVOLUM
      IDIM2=2*IPLANZ
      IAUX=NV+NS+1
      ALLOCATE(MESH(MMESH),ICEL(IDIM1),IPLAN(IDIM2))
      ALLOCATE(VOLSUR(IAUX),MATALB(IAUX),KEYMRG(IAUX))
      IF(IQUAD.EQ.1.OR.IQUAD.EQ.2) THEN
        ALLOCATE(XGS(NPHI),WGS(NPHI))
        IF(NDIM.EQ.3) THEN
          ALLOCATE(XGS1(NTETA),WGS1(NTETA))
        ENDIF
      ENDIF
      ALLOCATE(WW(NANGLE),A1(NANGLE),A2(NANGLE))
      IF(NDIM.EQ.3)ALLOCATE(A3(NANGLE))
      IF(IQUAD.EQ.1) THEN
*
*  GAUSS-LEGENDRE INTEGRATION POINTS
*
         CALL ALGPT(NPHI,-1.,1.,XGS,WGS)
         IF(NDIM.EQ.3)
     >     CALL ALGPT(NTETA,-1.,1.,XGS1,WGS1)
      ELSEIF(IQUAD.EQ.2) THEN
*
*        EQUAL WEIGHT INTEGRATION POINTS.
*
         DO 51 IA=1,NPHI
           XGS(IA)=(2.0*REAL(IA)-1.0)/REAL(NPHI)-1.0
           WGS(IA)=2.0/REAL(NPHI)
   51    CONTINUE
         IF(NDIM.EQ.3) THEN
           DO 61 IA=1,NTETA
             XGS1(IA)=(2.0*REAL(IA)-1.0)/REAL(NTETA)-1.0
             WGS1(IA)=2.0/REAL(NTETA)
   61      CONTINUE
         ENDIF
*
      ENDIF
      IF(IQUAD.EQ.1.OR.IQUAD.EQ.2) THEN
      KGAUS=-1
      IF(NDIM.EQ.3) THEN
      AUX=PI*0.125D0*0.125D0
      DO 445 IG=0,NTETA-1
*
* INTEGRATION OVER (0,PI/2) (COLATITUDE)
*
         SINT=SIN(0.25D0*PI*(DBLE(XGS1(IG+1))+1.0D0))
         COST=COS(0.25D0*PI*(DBLE(XGS1(IG+1))+1.0D0))
* INTEGRATION OVER (PI/2,PI) (COLATITUDE)
         SINT1=SIN(0.25D0*PI*(DBLE(XGS1(IG+1))+3.0D0))
         COST1=COS(0.25D0*PI*(DBLE(XGS1(IG+1))+3.0D0))
         DO 444 JG=0,NPHI-1
* INTEGRATION OVER  (0,PI/2) (LATITUDE)
            SINF=SIN(0.25D0*PI*(DBLE(XGS(JG+1))+1.0D0))
            COSF=COS(0.25D0*PI*(DBLE(XGS(JG+1))+1.0D0))
            KGAUS=KGAUS+1
            WW(KGAUS+1)=REAL(AUX*WGS1(IG+1)*WGS(JG+1)*SINT)
            A1(KGAUS+1)=REAL(SINT*COSF)
            A2(KGAUS+1)=REAL(SINT*SINF)
            A3(KGAUS+1)=REAL(COST)
            KGAUS=KGAUS+1
            WW(KGAUS+1)=REAL(AUX*WGS1(IG+1)*WGS(JG+1)*SINT1)
            A1(KGAUS+1)=REAL(SINT1*COSF)
            A2(KGAUS+1)=REAL(SINT1*SINF)
            A3(KGAUS+1)=REAL(COST1)
* INTEGRATION OVER (PI/2,PI)
            SINF1=SIN(0.25D0*PI*(DBLE(XGS(JG+1))+3.0D0))
            COSF1=COS(0.25D0*PI*(DBLE(XGS(JG+1))+3.0D0))
            KGAUS=KGAUS+1
            WW(KGAUS+1)=REAL(AUX*WGS1(IG+1)*WGS(JG+1)*SINT)
            A1(KGAUS+1)=REAL(SINT*COSF1)
            A2(KGAUS+1)=REAL(SINT*SINF1)
            A3(KGAUS+1)=REAL(COST)
            KGAUS=KGAUS+1
            WW(KGAUS+1)=REAL(AUX*WGS1(IG+1)*WGS(JG+1)*SINT1)
            A1(KGAUS+1)=REAL(SINT1*COSF1)
            A2(KGAUS+1)=REAL(SINT1*SINF1)
            A3(KGAUS+1)=REAL(COST1)
  444    CONTINUE
  445 CONTINUE
      DEALLOCATE(XGS1,WGS1)
      ELSE
      AUX=0.125D0
      DO 544 JG=0,NPHI-1
* INTEGRATION OVER  (0,PI/2)
         SINF=SIN(0.25D0*PI*(DBLE(XGS(JG+1))+1.0D0))
         COSF=COS(0.25D0*PI*(DBLE(XGS(JG+1))+1.0D0))
         KGAUS=KGAUS+1
         WW(KGAUS+1)=REAL(AUX*WGS(JG+1))
         A1(KGAUS+1)=REAL(COSF)
         A2(KGAUS+1)=REAL(SINF)
* INTEGRATION OVER (PI/2,PI)
         SINF=SIN(0.25*PI*(DBLE(XGS(JG+1))+3.0D0))
         COSF=COS(0.25*PI*(DBLE(XGS(JG+1))+3.0D0))
         KGAUS=KGAUS+1
         WW(KGAUS+1)=REAL(AUX*WGS(JG+1))
         A1(KGAUS+1)=REAL(COSF)
         A2(KGAUS+1)=REAL(SINF)
  544 CONTINUE
      ENDIF
      DEALLOCATE(WGS,XGS)
      ENDIF
      NANGL= NANGLE
      ALLOCATE(ANGLES(3*NANGL),DENSTY(NANGL))
      DO 21 IANG=1,NANGL
         ANGLES((IANG-1)*NDIM+1)=A1(IANG)
         ANGLES((IANG-1)*NDIM+2)=A2(IANG)
         IF(NDIM.EQ.3) ANGLES((IANG-1)*NDIM+3)=0.0
         DENSTY(IANG)=1.0/WW(IANG)
   21 CONTINUE
      IF(NDIM.EQ.3)ALLOCATE(IFACB(2*NCELAP))
      ALLOCATE(IFFV(NCELA),ISURB(NS-NSMIN-NSMAX),IVSYM(NV),ISSYM(NS))
      CALL MESHST(IPTRK,IPGEOM,MESH,ICEL,IPLAN,
     +            IPLAN(IPLANZ+1),NCELA,IPLANZ,ISTATE,
     +            ICEL(NCELA+1),ICEL(2*NCELA+1),NCPHY,
     +            VOLSUR,MATALB,SIDE,NCOUR,
     +            NSMIN,NSMAX,NS,IFACB,IFFV,
     +            ISURB,IVSYM,ISSYM,IHEX,LXI,
     +            NV,MCODE,SURL,IPLANI,LATV,ZMIN)
      CALL LCMSIX(IPGEOM,' ',0)
*d -
      IF(IHEX.EQ.9) THEN
         IF(MCODE.GT.0) DEALLOCATE(LATV)
      ENDIF
      DEALLOCATE(SURL)
*----
*  SET ARRAY MERGE CONTAINING MERGED VOLUMES AND SURFACES
*----
      NSOUT=0
      JAUX=0
      DO 20 J=NS-1, 0,-1
         KEYMRG(JAUX+1)=-ISSYM(J+1)
         NSOUT=MAX(NSOUT,ISSYM(J+1))
         JAUX= JAUX+1
   20 CONTINUE
      KEYMRG(JAUX+1)=0
      JAUX= JAUX+1
      DO 29 J=0,NV-1
         KEYMRG(JAUX+1)=IVSYM(J+1)
         JAUX= JAUX+1
   29 CONTINUE
      DEALLOCATE(IVSYM,ISSYM)
*
*      OPENING THE TRACK FILE
*
      IFILE=KDROPN('DUMMYSQ2',0,2,0)
      IF( IFILE.LE.0 ) GO TO 998
      IF( IFILE.EQ.IFTEMP ) CALL XABORT('XHXTRK: BAD TRACKING UNIT')
      IF( LTRK.NE.0 )THEN
      MAXCYL=1
      DO 140 I=0,NCELA-1
         MAXCYL=MAX(MAXCYL,ICEL(NCELA+I+1))
 140  CONTINUE
      MAXSEC=1
      SECTOR=.FALSE.
      DO 141 I=0,MVOLUM-1
         MMAXS=ICEL(2*NCELA+I+1)
         IF(MMAXS.GT.1) SECTOR=.TRUE.
         MAXSEC=MAX(MAXSEC,MMAXS)
 141  CONTINUE 
      ITOPT= LTRK-1
      NALBG= 6
      NSURF=2
      IF(NDIM.EQ.3) NSURF=4
      MXSEG= 2*NV+2*NSURF
      WRITE(IFILE) '$TRK',5,0,0
      COMENT='CREATOR  : DRAGON'
      WRITE(IFILE) COMENT
      COMENT='MODULE   : XHXTRK'
      WRITE(IFILE) COMENT
      COMENT='TYPE     : HEXAGONALE'
      WRITE(IFILE) COMENT
      COMENT='GEOMETRY : '//GEONAM
      WRITE(IFILE) COMENT
      COMENT=TITREC
      WRITE(IFILE) COMENT
      WRITE(IFILE) NDIM,ITOPT,NV,NS,NALBG,NSURF,NANGL,1,MXSEG
      WRITE(IFILE) (VOLSUR(J),J=1,IAUX)
      WRITE(IFILE) (MATALB(J),J=1,IAUX)
      WRITE(IFILE) (ICODE(J),J=1,NALBG)
      WRITE(IFILE) (ALBEDO(J),J=1,NALBG)
      WRITE(IFILE) (ANGLES(J),J=1,NDIM*NANGL)
      WRITE(IFILE) (DENSTY(J),J=1,NANGL)
      DEALLOCATE(DENSTY,ANGLES)
      MACP=(MAXCYL+1)*2*NCELA*(1+6*(MAXSEC-1))
      ALLOCATE(POP(MACP),IMAT(MACP*2))
      MTT=2*(MAXCYL+1)
      MT0=2*MTT*(1+6*(MAXSEC-1))
      ALLOCATE(T0(2*MT0),T1(2*MT0),IV0(MT0))
*
* RAYON DU CYLINDRE ENGLOBANT LA GEOMETRIE ET VALEURES EXTREMES DE Z
*
      DSIDE=DBLE(SIDE)
      RAYON=0.5D0*DSIDE*SQRT(1.0D0+3.0D0*(DBLE(2*NCOUR-1))**2) 
*
* FIND ODD NUMBER OF TRACKS THAT ENSURES MINIMUM REQUIRED
* DENSITY IS RESPECTED
*
      NBLINE=INT(RAYON*DENUSR+0.5D0)
      IF(MOD(NBLINE,2) .EQ. 0) NBLINE=NBLINE+1
      PASY=1.D0/DBLE(NBLINE)
      PASZ=PASY
      IF(NDIM.EQ.3) THEN
        NBLINE=INT(RAYON*DENUSZ+0.5D0)
        IF(MOD(NBLINE,2) .EQ. 0) NBLINE=NBLINE+1
        PASZ=1.D0/DBLE(NBLINE)
      ENDIF
      KANG=0
      ICC=1
      ICC1=1
      IF(NCELA.GT.1) THEN
        ICC=2+(NCOUR-1)*(1+3*(NCOUR-2))
        ICC1=2+(NCOUR-1)*(3*(NCOUR-2))
      ENDIF
      DZMIN=DBLE(ZMIN)
      IF(NDIM.EQ.3) THEN
        DZMAX=DBLE(MESH(3*NCELA))
      ELSE
        DZMAX=DZMIN
      ENDIF
*
      SQRT3=SQRT(3.)
      ALLOCATE(RAUX(2*MAXCYL))
*
*--CREATION DU VECTEUR CORN NECESSAIRE POUR LE STOCKAGE DES CELLULES
*--PERIPHERIQUES UTILISEES DANS TRKHEX
*
      IF(NDIM.EQ.3) THEN
        ICORN=IPLAN(1)
        IF(IPLANZ.GT.1) ICORN=ICORN+IPLAN(1)
        IF(IPLANZ.GT.2) ICORN=ICORN+(IPLANZ-2)*6*(NCOUR-1)
      ELSE
        ICORN=1
        IF(NCOUR.GT.1)ICORN=6*(NCOUR-1)
      ENDIF
      ALLOCATE(KCORN(ICORN))
      IFCC1=2+(NCOUR-1)*(3*(NCOUR-2))
      IF(NCELA.EQ.1) IFCC1=1
      IXX=0
      IF(NDIM.EQ.3) THEN
        DO 147 I=1,IPLAN(1)
          KCORN(IXX+1)=I
          IXX=IXX+1
 147    CONTINUE
        IF(IPLANZ.GT.1) THEN
          IAUX=IPLAN(1)+IFCC1
          DO 149 I=2,IPLANZ-1
          DO 148 J=IFCC1,IPLAN(1)
             KCORN(IXX+1)=IAUX
             IAUX=IAUX+1
             IXX=IXX+1
 148      CONTINUE
          IAUX=IPLAN(I)+IFCC1
 149      CONTINUE
          IYY=IPLANZ*IPLAN(1)
          IYY0=(IPLANZ-1)*IPLAN(1)+1
          DO 146 I=IYY0,IYY
           KCORN(IXX+1)=I
           IXX=IXX+1
 146     CONTINUE
        ENDIF
      ELSE
        DO 145 J=IFCC1,NCELA
           KCORN(IXX+1)=J
           IXX=IXX+1
 145    CONTINUE
      ENDIF
*
*   LES CELLULES VOISINES A CHAQUE VOLUME SONT STOCKEES.
*
      NCEL2=NCELA/IPLANZ
      ALLOCATE(IVOIS(6*NCEL2))
      IVV=-1
      DO 165 I=1,NCEL2
        DO 160 J=1,6
          IVV=IVV+1 
          IVOIS(IVV+1)=NEIGHB(I,J,9,NCEL2,POIDSH)
 160    CONTINUE
 165  CONTINUE
      IF(IPRT .GE. 100) THEN
        IF(NDIM .EQ. 3) THEN
          WRITE(IOUT,6300) NAMSBR,NCELA
          WRITE(IOUT,6301) (MESH(II+1),MESH(II+NCELA),
     >                      MESH(II+2*NCELA),II=1,NCELA) 
        ELSE
          WRITE(IOUT,6200) NAMSBR,NCELA
          WRITE(IOUT,6201) (MESH(II),MESH(II+NCELA),II=1,NCELA)
        ENDIF
      ENDIF
*----
*  SAVE EXCELL TRACKING FOR HEXAGONAL GEOMETRY
*----
      CALL LCMSIX(IPTRK,'EXCELL      ',1)
      IPARAM(:NSTATE)=0
      IAUX=NV+NS+1 
      IAUXS=NS-NSMIN-NSMAX
      IAUXX=2*NCELAP
      IPARAM(1)=NDIM
      IPARAM(2)=NS
      IPARAM(3)=NV
      IPARAM(4)=NCELA
      IPARAM(5)=MMESH
      IPARAM(6)=IAUX
      IPARAM(7)=MAXCYL
      IPARAM(8)=MAXSEC
      IPARAM(9)=IPLANZ
      IPARAM(10)=IDIM1
      IPARAM(11)=IDIM2
      IPARAM(12)=IAUXS
      IPARAM(13)=IAUXX
      CALL LCMPUT(IPTRK,'ICEL        ',IDIM1 ,1,ICEL )
      CALL LCMPUT(IPTRK,'IPLAN       ',IDIM2 ,1,IPLAN)
      IF(NDIM.EQ.3)
     >CALL LCMPUT(IPTRK,'IFACB       ',IAUXX ,1,IFACB)
      CALL LCMPUT(IPTRK,'IFFV        ',NCELA ,1,IFFV )
      IF(IAUXS.GT.0)
     >CALL LCMPUT(IPTRK,'ISURB       ',IAUXS ,1,ISURB)
      CALL LCMPUT(IPTRK,'REMESH      ',MMESH ,2,MESH )
      CALL LCMPUT(IPTRK,'KEYMRG      ',IAUX  ,1,KEYMRG  )
      CALL LCMPUT(IPTRK,'MATALB      ',IAUX  ,1,MATALB  )
      CALL LCMPUT(IPTRK,'VOLSUR      ',IAUX  ,2,VOLSUR  )
      CALL LCMPUT(IPTRK,'STATE-VECTOR',NSTATE,1,IPARAM  ) 
      CALL LCMSIX(IPTRK,'EXCELL      ',2)
      DO 150 IANG=1,NANGLE
       KANG=IANG
       COS1=A1(IANG)
       COS2=A2(IANG)
       COS3=0.0
       IF(NDIM.EQ.3) COS3=A3(IANG)
       PPASY=PASY
       PPASZ=PASZ
       POIDS=WW(IANG) 
       IF(IPRT .GE. 500) WRITE(IOUT,6400) IANG
       CALL TRKHEX(IPRT,NCELA,ICEL,MESH,MMESH,PPASY,
     +             DSIDE,COS1,COS2,COS3,POP,IPLAN,
     +             IPLANZ,IPLAN(IPLANZ+1),NDIM,
     +             ICEL(NCELA+1),IMAT,IFILE,KANG,POIDS,
     +             IMAT(MACP+1),ICEL(2*NCELA+1),T0,
     +             T1,IV0,IV0(MTT+1),PPASZ,RAYON,DZMIN,
     +             DZMAX,IFACB,IFFV,SECTOR,NSMIN+1,ISURB,RAUX,
     +             NSURF,KCORN,ICORN,IVOIS,NCEL2,NS)
        ZMIN=REAL(DZMIN)
  150 CONTINUE
      DEALLOCATE(IVOIS,KCORN,IMAT,ISURB,RAUX,POP,T0,T1,IV0,WW,A1,A2,
     + IFFV)
      IF(NDIM.EQ.3) DEALLOCATE(IFACB,A3)
      ENDIF
      DEALLOCATE(MESH,ICEL,IPLAN)
*----
*  SET BC MATRIX
*----
      ALLOCATE(MATRT(NSOUT))
      DO 200 ISS=1,NSOUT
        MATRT(ISS)=ISS
 200  CONTINUE
      CALL LCMPUT(IPTRK,'BC-REFL+TRAN',NSOUT,1,MATRT)
      DEALLOCATE(MATRT)
*----
*  SET NCOR=1
*----
      REWIND IFILE
      CALL XELCOR(IFILE,IFTEMP)
      IER=KDRCLS(IFILE,2)
      IF(IER.LT.0) GO TO 999
      DEALLOCATE(KEYMRG,MATALB,VOLSUR)
      RETURN
*
  998 WRITE(IOUT,'(31H ECHO = UNABLE TO OPEN  FILE FT,I4)') IFILE
      CALL XABORT('XHXTRK: OPEN  FAILED')
  999 WRITE(IOUT,'(31H ECHO = UNABLE TO CLOSE FILE FT,I4)') IFILE
      CALL XABORT('XHXTRK: CLOSE FAILED')
 6000 FORMAT(' >>> GLOBAL GEOMETRY NAME TREATED: ',A12/
     >       ' >>>  EXACT EXCELL *CP* TREATMENT <<'/)
 6200 FORMAT(' ---> OUTPUT FROM ',A6,': NUMBER OF CELLS = ',I10/ 
     >       9X,'X-MESH',9X,'Y-MESH')
 6201 FORMAT(1P,2E15.6)
 6300 FORMAT(' ---> OUTPUT FROM ',A6,': NUMBER OF CELLS = ',I10/ 
     >       9X,'X-MESH',9X,'Y-MESH',9X,'Z-MESH')
 6301 FORMAT(1P,3E15.6)
 6400 FORMAT(' INTEGRATION DIRECTION = ',I10)
      END