HLT/src/AliL3Transform.cxx

   1 /* $Id$
   2 // Author: Anders Vestbo <mailto:vestbo@fi.uib.no>, Uli Frankenfeld <mailto:franken@fi.uib.no>
   3 //*-- Copyright &copy ASV
   4 // changes done by Constantin Loizides <mailto:loizides@ikf.physik.uni-frankfurt.de>
   5 */
   6
   7 #include "AliL3Logging.h"
   8 #include "AliL3Transform.h"
   9 #include <math.h>
  10
  11 //_____________________________________________________________
  12 // AliL3Transform
  13 //
  14 // Transformation class for ALICE TPC.
  15 //
  16 // Class which contains all detector specific parameters for the TPC,
  17 // and different useful functions for coordinate transforms.
  18 //
  19 // The class is completely static, which means that no object needs
  20 // to be instantiated. Function calls should then be done like:
  21 //
  22 // AliL3Transform::GetEta(xyz);
  23 //
  24 // IMPORTANT: If used as is, default detector parameters will be used,
  25 //            and you really have to make sure that these correspond to
  26 //            the AliROOT version you are currently working on!!
  27 //            You should therefore always initialize the parameters by
  28 //
  29 //            AliL3Transform::Init(path);
  30 //
  31 //            where path is a char*, giving the path to where file containing
  32 //            the detector parameter is located. This file should be called
  33 //            "l3transform.config", and can be created with macro exa/Make_Init.C.
  34
  35 ClassImp(AliL3Transform)
  36
  37 Int_t AliL3Transform::fVersion = 0;
  38 Int_t AliL3Transform::fNTimeBins = 446 ;
  39 Int_t AliL3Transform::fNRowLow = 64 ;
  40 Int_t AliL3Transform::fNRowUp = 112 ;
  41 Int_t AliL3Transform::fNSectorLow = 36 ;
  42 Int_t AliL3Transform::fNSectorUp = 36 ;
  43 Int_t AliL3Transform::fNSector = 72 ;
  44 Double_t AliL3Transform::fPadPitchWidthLow = 0.400000 ;
  45 Double_t AliL3Transform::fPadPitchWidthUp = 0.600000 ;
  46 Double_t AliL3Transform::fZWidth = 0.56599998474121093750 ;
  47 Double_t AliL3Transform::fZSigma = 0.22880849748219134199 ;
  48 Double_t AliL3Transform::fZOffset = 0.68642549244657402596;
  49 Double_t AliL3Transform::fZLength = 250.;
  50 Int_t AliL3Transform::fNSlice = 36 ;
  51 Int_t AliL3Transform::fNRow = 176 ;
  52 Double_t AliL3Transform::fNRotShift = 0.5 ;
  53 Double_t AliL3Transform::fPi = 3.141592653589793 ;
  54 Double_t AliL3Transform::fX[176] = {84.570007324218750,
  55                                     85.320007324218750,
  56                                     86.070007324218750,
  57                                     86.820007324218750,
  58                                     87.570007324218750,
  59                                     88.320007324218750,
  60                                     89.070007324218750,
  61                                     89.820007324218750,
  62                                     90.570007324218750,
  63                                     91.320007324218750,
  64                                     92.070007324218750,
  65                                     92.820007324218750,
  66                                     93.570007324218750,
  67                                     94.320007324218750,
  68                                     95.070007324218750,
  69                                     95.820007324218750,
  70                                     96.570007324218750,
  71                                     97.320007324218750,
  72                                     98.070007324218750,
  73                                     98.820007324218750,
  74                                     99.570007324218750,
  75                                     100.320007324218750,
  76                                     101.070007324218750,
  77                                     101.820007324218750,
  78                                     102.570007324218750,
  79                                     103.320007324218750,
  80                                     104.070007324218750,
  81                                     104.820007324218750,
  82                                     105.570007324218750,
  83                                     106.320007324218750,
  84                                     107.070007324218750,
  85                                     107.820007324218750,
  86                                     108.570007324218750,
  87                                     109.320007324218750,
  88                                     110.070007324218750,
  89                                     110.820007324218750,
  90                                     111.570007324218750,
  91                                     112.320007324218750,
  92                                     113.070007324218750,
  93                                     113.820007324218750,
  94                                     114.570007324218750,
  95                                     115.320007324218750,
  96                                     116.070007324218750,
  97                                     116.820007324218750,
  98                                     117.570007324218750,
  99                                     118.320007324218750,
 100                                     119.070007324218750,
 101                                     119.820007324218750,
 102                                     120.570007324218750,
 103                                     121.320007324218750,
 104                                     122.070007324218750,
 105                                     122.820007324218750,
 106                                     123.570007324218750,
 107                                     124.320007324218750,
 108                                     125.070007324218750,
 109                                     125.820007324218750,
 110                                     126.570007324218750,
 111                                     127.320007324218750,
 112                                     128.070007324218750,
 113                                     128.820007324218750,
 114                                     129.570007324218750,
 115                                     130.320007324218750,
 116                                     131.070007324218750,
 117                                     131.820007324218750,
 118                                     135.054992675781250,
 119                                     136.054992675781250,
 120                                     137.054992675781250,
 121                                     138.054992675781250,
 122                                     139.054992675781250,
 123                                     140.054992675781250,
 124                                     141.054992675781250,
 125                                     142.054992675781250,
 126                                     143.054992675781250,
 127                                     144.054992675781250,
 128                                     145.054992675781250,
 129                                     146.054992675781250,
 130                                     147.054992675781250,
 131                                     148.054992675781250,
 132                                     149.054992675781250,
 133                                     150.054992675781250,
 134                                     151.054992675781250,
 135                                     152.054992675781250,
 136                                     153.054992675781250,
 137                                     154.054992675781250,
 138                                     155.054992675781250,
 139                                     156.054992675781250,
 140                                     157.054992675781250,
 141                                     158.054992675781250,
 142                                     159.054992675781250,
 143                                     160.054992675781250,
 144                                     161.054992675781250,
 145                                     162.054992675781250,
 146                                     163.054992675781250,
 147                                     164.054992675781250,
 148                                     165.054992675781250,
 149                                     166.054992675781250,
 150                                     167.054992675781250,
 151                                     168.054992675781250,
 152                                     169.054992675781250,
 153                                     170.054992675781250,
 154                                     171.054992675781250,
 155                                     172.054992675781250,
 156                                     173.054992675781250,
 157                                     174.054992675781250,
 158                                     175.054992675781250,
 159                                     176.054992675781250,
 160                                     177.054992675781250,
 161                                     178.054992675781250,
 162                                     179.054992675781250,
 163                                     180.054992675781250,
 164                                     181.054992675781250,
 165                                     182.054992675781250,
 166                                     183.054992675781250,
 167                                     184.054992675781250,
 168                                     185.054992675781250,
 169                                     186.054992675781250,
 170                                     187.054992675781250,
 171                                     188.054992675781250,
 172                                     189.054992675781250,
 173                                     190.054992675781250,
 174                                     191.054992675781250,
 175                                     192.054992675781250,
 176                                     193.054992675781250,
 177                                     194.054992675781250,
 178                                     195.054992675781250,
 179                                     196.054992675781250,
 180                                     197.054992675781250,
 181                                     198.054992675781250,
 182                                     199.054992675781250,
 183                                     200.054992675781250,
 184                                     201.054992675781250,
 185                                     202.054992675781250,
 186                                     203.054992675781250,
 187                                     204.054992675781250,
 188                                     205.054992675781250,
 189                                     206.054992675781250,
 190                                     207.054992675781250,
 191                                     208.054992675781250,
 192                                     209.054992675781250,
 193                                     210.054992675781250,
 194                                     211.054992675781250,
 195                                     212.054992675781250,
 196                                     213.054992675781250,
 197                                     214.054992675781250,
 198                                     215.054992675781250,
 199                                     216.054992675781250,
 200                                     217.054992675781250,
 201                                     218.054992675781250,
 202                                     219.054992675781250,
 203                                     220.054992675781250,
 204                                     221.054992675781250,
 205                                     222.054992675781250,
 206                                     223.054992675781250,
 207                                     224.054992675781250,
 208                                     225.054992675781250,
 209                                     226.054992675781250,
 210                                     227.054992675781250,
 211                                     228.054992675781250,
 212                                     229.054992675781250,
 213                                     230.054992675781250,
 214                                     231.054992675781250,
 215                                     232.054992675781250,
 216                                     233.054992675781250,
 217                                     234.054992675781250,
 218                                     235.054992675781250,
 219                                     236.054992675781250,
 220                                     237.054992675781250,
 221                                     238.054992675781250,
 222                                     239.054992675781250,
 223                                     240.054992675781250,
 224                                     241.054992675781250,
 225                                     242.054992675781250,
 226                                     243.054992675781250,
 227                                     244.054992675781250,
 228                                     245.054992675781250,
 229                                     246.054992675781250,
 230 };
 231
 232 Int_t AliL3Transform::fNPads[176] = {67,
 233                                      67,
 234                                      67,
 235                                      69,
 236                                      69,
 237                                      69,
 238                                      71,
 239                                      71,
 240                                      71,
 241                                      73,
 242                                      73,
 243                                      73,
 244                                      75,
 245                                      75,
 246                                      75,
 247                                      77,
 248                                      77,
 249                                      77,
 250                                      79,
 251                                      79,
 252                                      79,
 253                                      81,
 254                                      81,
 255                                      81,
 256                                      83,
 257                                      83,
 258                                      83,
 259                                      85,
 260                                      85,
 261                                      85,
 262                                      87,
 263                                      87,
 264                                      87,
 265                                      89,
 266                                      89,
 267                                      89,
 268                                      91,
 269                                      91,
 270                                      91,
 271                                      93,
 272                                      93,
 273                                      93,
 274                                      95,
 275                                      95,
 276                                      95,
 277                                      97,
 278                                      97,
 279                                      97,
 280                                      99,
 281                                      99,
 282                                      99,
 283                                      101,
 284                                      101,
 285                                      101,
 286                                      103,
 287                                      103,
 288                                      103,
 289                                      105,
 290                                      105,
 291                                      105,
 292                                      107,
 293                                      107,
 294                                      107,
 295                                      109,
 296                                      73,
 297                                      75,
 298                                      75,
 299                                      75,
 300                                      77,
 301                                      77,
 302                                      77,
 303                                      77,
 304                                      79,
 305                                      79,
 306                                      79,
 307                                      81,
 308                                      81,
 309                                      81,
 310                                      83,
 311                                      83,
 312                                      83,
 313                                      83,
 314                                      85,
 315                                      85,
 316                                      85,
 317                                      87,
 318                                      87,
 319                                      87,
 320                                      87,
 321                                      89,
 322                                      89,
 323                                      89,
 324                                      91,
 325                                      91,
 326                                      91,
 327                                      93,
 328                                      93,
 329                                      93,
 330                                      93,
 331                                      95,
 332                                      95,
 333                                      95,
 334                                      97,
 335                                      97,
 336                                      97,
 337                                      97,
 338                                      99,
 339                                      99,
 340                                      99,
 341                                      101,
 342                                      101,
 343                                      101,
 344                                      103,
 345                                      103,
 346                                      103,
 347                                      103,
 348                                      105,
 349                                      105,
 350                                      105,
 351                                      107,
 352                                      107,
 353                                      107,
 354                                      107,
 355                                      109,
 356                                      109,
 357                                      109,
 358                                      111,
 359                                      111,
 360                                      111,
 361                                      113,
 362                                      113,
 363                                      113,
 364                                      113,
 365                                      115,
 366                                      115,
 367                                      115,
 368                                      117,
 369                                      117,
 370                                      117,
 371                                      117,
 372                                      119,
 373                                      119,
 374                                      119,
 375                                      121,
 376                                      121,
 377                                      121,
 378                                      123,
 379                                      123,
 380                                      123,
 381                                      123,
 382                                      125,
 383                                      125,
 384                                      125,
 385                                      127,
 386                                      127,
 387                                      127,
 388                                      127,
 389                                      129,
 390                                      129,
 391                                      129,
 392                                      131,
 393                                      131,
 394                                      131,
 395                                      133,
 396                                      133,
 397                                      133,
 398                                      133,
 399                                      135,
 400                                      135,
 401                                      135,
 402                                      137,
 403                                      137,
 404                                      137,
 405                                      137,
 406                                      139,
 407                                      139,
 408 };
 409
 410
 411
 412 void AliL3Transform::Init(const Char_t* path)
 413 {
 414   //Overwrite the parameters with values stored in file "l3transform.config" in path.
 415   //If file does not exist, old default values will be used.
 416
 417   Char_t *pathname=new Char_t[1024];
 418   strcpy(pathname,path);
 419   strcat(pathname,"/l3transform.config");
 420
 421   FILE *fptr=fopen(pathname,"r");
 422   if(!fptr){
 423     LOG(AliL3Log::kWarning,"AliL3Transform::Init","File Open")
 424       <<"Pointer to Config File \""<<pathname<<"\" 0x0!"<<ENDLOG;
 425     return;
 426   }
 427
 428   Char_t d1[250], d2[100], d3[100];
 429   Int_t dummy=0;
 430   Double_t ddummy=0.0;
 431
 432   while(!feof(fptr)) {
 433     fscanf(fptr,"%s",d1);
 434
 435     if(strcmp(d1,"fNTimeBins")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNTimeBins=(Int_t)dummy;}
 436     else if(strcmp(d1,"fNRowLow")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNRowLow=(Int_t)dummy;}
 437     else if(strcmp(d1,"fNRowUp")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNRowUp=(Int_t)dummy;}
 438     else if(strcmp(d1,"fNSectorLow")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNSectorLow=(Int_t)dummy;}
 439     else if(strcmp(d1,"fNSectorUp")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNSectorUp=(Int_t)dummy;}
 440     else if(strcmp(d1,"fNSector")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNSector=(Int_t)dummy;}
 441     else if(strcmp(d1,"fPadPitchWidthLow")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fPadPitchWidthLow=(Double_t)ddummy;}
 442     else if(strcmp(d1,"fPadPitchWidthUp")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fPadPitchWidthUp=(Double_t)ddummy;}
 443     else if(strcmp(d1,"fZWidth")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fZWidth=(Double_t)ddummy;}
 444     else if(strcmp(d1,"fZSigma")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fZSigma=(Double_t)ddummy;}
 445     else if(strcmp(d1,"fZLength")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fZLength=(Double_t)ddummy;}
 446     else if(strcmp(d1,"fZOffset")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fZOffset=(Double_t)ddummy;}
 447     else if(strcmp(d1,"fNSlice")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNSlice=(Int_t)dummy;}
 448     else if(strcmp(d1,"fNRow")==0){
 449       fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNRow=(Int_t)dummy;
 450       if(fNRow!=176){
 451         LOG(AliL3Log::kError,"AliL3Transform::Init","Overflow")<<"Number of PadRows should be 176! Check and fgrep the code for 176 to see the consequences of this major change!"<<ENDLOG;
 452       }
 453     }
 454     else if(strcmp(d1,"fNRotShift")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fNRotShift=(Double_t)ddummy;}
 455     else if(strcmp(d1,"fPi")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fPi=(Double_t)ddummy;}
 456     else if(strcmp(d1,"fX[0]")==0){
 457       fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fX[0]=(Double_t)ddummy;
 458       for(Int_t i=1;i<fNRow;i++){fscanf(fptr,"%s %s %lf %s",d1,d2,&ddummy,d3);fX[i]=(Double_t)ddummy;}
 459     }
 460     else if(strcmp(d1,"fNPads[0]")==0){
 461       fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNPads[0]=(Int_t)dummy;
 462       for(Int_t i=1;i<fNRow;i++){fscanf(fptr,"%s %s %d %s",d1,d2,&dummy,d3);fNPads[i]=(Int_t)dummy;}
 463     }
 464   }
 465
 466   fclose(fptr);
 467   delete pathname;
 468   fVersion=1; //new version
 469
 470 }
 471
 472
 473 Double_t AliL3Transform::GetEta(Float_t *xyz)
 474 {
 475   Double_t r3 = sqrt(xyz[0]*xyz[0]+xyz[1]*xyz[1]+xyz[2]*xyz[2]);
 476   Double_t eta = 0.5 * log((r3+xyz[2])/(r3-xyz[2]));
 477   return eta;
 478 }
 479
 480 void AliL3Transform::XYZtoRPhiEta(Float_t *rpe, Float_t *xyz)
 481 {
 482   rpe[0] = sqrt(xyz[0]*xyz[0]+xyz[1]*xyz[1]+xyz[2]*xyz[2]);
 483   rpe[1] = atan2(xyz[1],xyz[0]);
 484   rpe[2] = 0.5 * log((rpe[0]+xyz[2])/(rpe[0]-xyz[2]));
 485 }
 486
 487 Double_t AliL3Transform::GetEta(Int_t padrow,Int_t pad,Int_t time)
 488 {
 489   Float_t xyz[3];
 490   Int_t sector,row;
 491   Slice2Sector(0,padrow,sector,row);
 492   Raw2Local(xyz,sector,row,pad,time);
 493
 494   return GetEta(xyz);
 495 }
 496
 497 Double_t AliL3Transform::GetPhi(Float_t *xyz)
 498 {
 499   Double_t phi = atan2(xyz[1],xyz[0]);
 500   //if(phi<0) phi=phi+2*TMath::Pi();
 501   return phi;
 502 }
 503
 504 Bool_t AliL3Transform::Slice2Sector(Int_t slice, Int_t slicerow, Int_t & sector, Int_t &row)
 505 {
 506   if(slicerow<0&&slicerow>=fNRow) return kFALSE;
 507   if(slice<0||slice>=fNSlice) return kFALSE;
 508
 509   if(slicerow<fNRowLow){
 510     sector = slice;
 511     row    = slicerow;
 512   }
 513   else {
 514     sector = slice+fNSlice;
 515     row    = slicerow-fNRowLow;
 516   }
 517   return kTRUE;
 518 }
 519
 520 Bool_t AliL3Transform::Sector2Slice(Int_t & slice, Int_t  sector)
 521 {
 522   if(sector<0||sector>=fNSector) return kFALSE;
 523   if(sector<fNSectorLow) slice = sector;
 524   else          slice = sector - fNSectorLow;
 525   return kTRUE;
 526 }
 527
 528 Bool_t AliL3Transform::Sector2Slice(Int_t & slice, Int_t & slicerow,Int_t  sector, Int_t row)
 529 {
 530   if(sector<0||sector>=fNSector||row<0) return kFALSE;
 531   if(sector<fNSectorLow){
 532     if(row>=fNRowLow) return kFALSE;
 533     slice = sector;
 534     slicerow = row;
 535   }
 536   else{
 537     if(row>=fNRowUp) return kFALSE;
 538     slice = sector - fNSectorLow;
 539     slicerow = row + fNRowLow;
 540   }
 541   return kTRUE;
 542 }
 543
 544 Double_t AliL3Transform::Row2X(Int_t slicerow){
 545   if(slicerow<0||slicerow>=fNRow) return 0;
 546   return fX[slicerow];
 547 }
 548
 549 void AliL3Transform::Local2Global(Float_t *xyz,Int_t slice)
 550 {
 551   //Transformation to global coordinate system
 552   Float_t x0 = xyz[0];
 553   Float_t y0 = xyz[1];
 554   Float_t cs,sn;
 555   cs = cos( (2*fPi/18) * (slice+fNRotShift) );
 556   sn = sin( (2*fPi/18) * (slice+fNRotShift) );
 557   xyz[0]=x0*cs-y0*sn;
 558   xyz[1]=x0*sn+y0*cs;
 559   xyz[2]=xyz[2];//global z=local z
 560 }
 561
 562 void AliL3Transform::Local2GlobalAngle(Float_t *angle,Int_t slice){
 563   angle[0] = fmod(angle[0]+(slice+fNRotShift)*(2*fPi/18),2*fPi);
 564 }
 565
 566 void AliL3Transform::Global2LocalAngle(Float_t *angle,Int_t slice){
 567   angle[0] = angle[0]-(slice+fNRotShift)*(2*fPi/18);
 568   if(angle[0]<0) angle[0]+=2*fPi;
 569 }
 570
 571 void AliL3Transform::Raw2Local(Float_t *xyz,Int_t sector,Int_t row,Float_t pad,Float_t time)
 572 {
 573   //Transformation from rawdata to local coordinate system
 574
 575   Int_t slice,slicerow;
 576   Sector2Slice(slice, slicerow, sector, row);
 577
 578   //X-Value
 579   xyz[0]=Row2X(slicerow);
 580
 581   //Y-Value
 582   Int_t npads= fNPads[slicerow];
 583   if(sector<fNSectorLow)
 584     xyz[1]=(pad-0.5*(npads-1))*fPadPitchWidthLow;
 585   else
 586     xyz[1]=(pad-0.5*(npads-1))*fPadPitchWidthUp;
 587
 588   //Z-Value (remember PULSA Delay)
 589   //xyz[2]=fZWidth*time-3.*fZSigma;
 590   xyz[2]=fZWidth*time-fZOffset;
 591   if(slice < 18)
 592     xyz[2]=fZLength-xyz[2];
 593   else
 594     xyz[2]=xyz[2]-fZLength;
 595
 596 }
 597
 598 void AliL3Transform::Local2Global(Float_t *xyz,Int_t sector,Int_t row)
 599 {
 600   //Transformation to global coordinate system
 601   Int_t slice,slicerow;
 602   Sector2Slice(slice, slicerow, sector, row);
 603   Float_t r=Row2X(slicerow);
 604   Float_t cs = cos( (2*fPi/18) * (slice+fNRotShift) );
 605   Float_t sn = sin( (2*fPi/18) * (slice+fNRotShift) );
 606
 607   xyz[0]=r*cs-xyz[1]*sn;
 608   xyz[1]=r*sn+xyz[1]*cs;
 609   xyz[2]=xyz[2];//global z=local z
 610 }
 611
 612 Double_t AliL3Transform::GetMaxY(Int_t slicerow)
 613 {
 614
 615  if(slicerow < fNRowLow)
 616      return fPadPitchWidthLow*fNPads[slicerow]/2;
 617
 618  else
 619      return fPadPitchWidthUp*fNPads[slicerow]/2;
 620
 621 }
 622
 623 void AliL3Transform::Global2Local(Float_t *xyz,Int_t sector,Bool_t isSlice)
 624 {
 625
 626   Int_t slice;
 627   if(!isSlice)
 628     Sector2Slice(slice, sector);
 629   else
 630     slice = sector;
 631   Float_t cs = cos( (2*fPi/18) * (slice+fNRotShift) );
 632   Float_t sn = sin( (2*fPi/18) * (slice+fNRotShift) );
 633   Float_t x1 = xyz[0]*cs + xyz[1]*sn;
 634   Float_t y1 = -xyz[0]*sn + xyz[1]*cs;
 635   xyz[0] = x1;
 636   xyz[1] = y1;
 637 }
 638
 639 void AliL3Transform::Raw2Global(Float_t *xyz,Int_t sector,Int_t row,Float_t pad,Float_t time)
 640 {
 641   //Transformation from raw to global coordinates
 642
 643   Raw2Local(xyz,sector,row,pad,time);
 644   Local2Global(xyz,sector,row);
 645 }
 646
 647 void AliL3Transform::Local2Raw(Float_t *xyz,Int_t sector,Int_t row)
 648 {
 649   //Transformation from local coordinates to raw
 650
 651   Int_t slice,slicerow;
 652   Sector2Slice(slice, slicerow, sector, row);
 653
 654   if(sector<fNSectorLow)
 655     xyz[1]=xyz[1]/fPadPitchWidthLow+0.5*(fNPads[slicerow]-1);
 656   else
 657     xyz[1]=xyz[1]/fPadPitchWidthUp+0.5*(fNPads[slicerow]-1);
 658   Int_t sign=-1;
 659   Int_t nis=fNSectorLow;
 660   Int_t nos=fNSectorUp;
 661
 662   if ((sector<nis/2) || ((sector-nis)<nos/2)) sign=1;
 663   xyz[2]=fZLength-sign*xyz[2];
 664   xyz[2]=(xyz[2]+fZOffset)/fZWidth;
 665
 666 }
 667
 668 void AliL3Transform::Global2Raw(Float_t *xyz,Int_t sector,Int_t row)
 669 {
 670   //Transformation from global coordinates to raw.
 671
 672   Global2Local(xyz,sector);
 673   Local2Raw(xyz,sector,row);
 674
 675 }