ITS/AliITSTrackerV1.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /*
  17 $Log$
  18 Revision 1.20  2001/11/21 14:47:45  barbera
  19 Some unuseful print-out commented out
  20
  21 Revision 1.19  2001/11/21 10:49:07  barbera
  22 Bug correction suggested by Rene done
  23
  24 Revision 1.18  2001/11/20 15:46:17  barbera
  25 Point coordinated are calculated in cylindrical reference frame once and for all at the beginning of tracking V1
  26
  27 Revision 1.10.2.1  2001/10/24 07:26:04  hristov
  28 All the changes from the head are merged with the release
  29
  30 Revision 1.14  2001/10/24 07:19:57  hristov
  31 Some pointer correctly initialised in one of the constructors
  32
  33 Revision 1.13  2001/10/21 19:17:12  hristov
  34 Several pointers were set to zero in the default constructors to avoid memory management problems
  35
  36 Revision 1.12  2001/10/19 21:32:35  nilsen
  37 Minor changes to remove compliation warning on gcc 2.92.2 compiler, and
  38 cleanded up a little bit of code.
  39
  40 */
  41 //     The purpose of this class is to permorm the ITS tracking. The
  42 // constructor has the task to inizialize some private members. The method
  43 // DoTracking is written to be called by a macro. It gets the event number,
  44 // the minimum and maximum order number of TPC tracks that are to be tracked
  45 // trough the ITS, and the file where the recpoints are registered. The
  46 // method Recursivetracking is a recursive function that performs the
  47 // tracking trough the ITS The method Intersection found the layer, ladder
  48 // and detector whre the intersection take place and caluclate the
  49 // cohordinates of this intersection. It returns an integer that is 0 if the
  50 // intersection has been found successfully. The two mwthods Kalmanfilter
  51 // and kalmanfiltervert operate the kalmanfilter without and with the vertex
  52 // imposition respectively. The authors thank Mariana Bondila to have help
  53 // them to resolve some problems.  July-2000
  54
  55 #include <iostream.h>
  56 #include <fstream.h>
  57 #include <TMath.h>
  58 #include <TBranch.h>
  59 #include <TVector.h>
  60 #include <TFile.h>
  61 #include <TTree.h>
  62 #include <TStopwatch.h>
  63
  64 #include "TParticle.h"
  65 #include "AliRun.h"
  66 #include "AliITS.h"
  67 #include "AliITSsegmentationSSD.h"
  68 #include "AliITSgeomSPD.h"
  69 #include "AliITSgeomSDD.h"
  70 #include "AliITSgeomSSD.h"
  71 #include "AliITSgeom.h"
  72 #include "AliITSRecPoint.h"
  73 #include "stdlib.h"
  74 #include "AliKalmanTrack.h"
  75 #include "AliMagF.h"
  76 #include "AliITSTrackV1.h"
  77 #include "AliITSIOTrack.h"
  78 #include "AliITSRad.h"
  79 #include "../TPC/AliTPCtracker.h"
  80 #include "AliITSTrackerV1.h"
  81 #include "AliITSVertex.h"
  82
  83 ClassImp(AliITSTrackerV1)
  84  //______________________________________________________________________
  85 AliITSTrackerV1::AliITSTrackerV1() {
  86   //Default constructor
  87   fITS = 0;
  88   fresult = 0;
  89   fPtref=0.;
  90   fChi2max=0.;
  91   //fepsphi=0.;
  92   //fepsz=0.;
  93   frecPoints = 0;
  94   fvettid = 0;
  95   fflagvert=0;
  96   frl = 0;
  97   Int_t ia;
  98   for(ia=0; ia<6; ia++) {
  99   fNlad[ia]=0;
 100   fNdet[ia]=0;
 101   fAvrad[ia]=0.;
 102   fDetx[ia]=0.;
 103   fDetz[ia]=0.;
 104   } // end for ia
 105   fzmin = 0;
 106   fzmax = 0;
 107   fphimin = 0;
 108   fphimax = 0;
 109   fphidet = 0;
 110   fNRecPoints=0;
 111   fRecCylR=0;
 112   fRecCylPhi=0;
 113   fRecCylZ=0;
 114   fFieldFactor=0;
 115 }
 116 //______________________________________________________________________
 117 AliITSTrackerV1::AliITSTrackerV1(AliITS* IITTSS, Int_t evnumber, Bool_t flag) {
 118     //Origin   A. Badala' and G.S. Pappalardo:
 119     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 120     // Class constructor. It does some initializations.
 121
 122   //PH Initialisation taken from the default constructor
 123     fITS      = IITTSS;
 124     fresult = 0;
 125     fPtref    = 0.;
 126     fChi2max  =0.;
 127     frecPoints = 0;
 128     fvettid = 0;
 129     fflagvert = flag;
 130     frl = 0;
 131     fzmin = 0;
 132     fzmax = 0;
 133     fphimin = 0;
 134     fphimax = 0;
 135     fphidet = 0;
 136
 137     Int_t imax = 200,jmax = 450;
 138     frl       = new AliITSRad(imax,jmax);
 139
 140     //////////  gets information on geometry /////////////////////////////
 141          AliITSgeom *g1 = fITS->GetITSgeom();
 142     Int_t ll=1, dd=1;
 143     TVector det(9);
 144
 145     Int_t ia;
 146     for(ia=0; ia<6; ia++) {
 147         fNlad[ia]=g1->GetNladders(ia+1);
 148         fNdet[ia]=g1->GetNdetectors(ia+1);
 149         //cout<<fNlad[i]<<" "<<fNdet[i]<<"\n";
 150     } // end for ia
 151
 152     //cout<<" mean radius = ";
 153     Int_t ib;
 154     for(ib=0; ib<6; ib++) {
 155         g1->GetCenterThetaPhi(ib+1,ll,dd,det);
 156         Double_t r1=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 157         g1->GetCenterThetaPhi(ib+1,ll,dd+1,det);
 158         Double_t r2=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 159         fAvrad[ib]=(r1+r2)/2.;
 160         //cout<<fAvrad[ib]<<" ";
 161     } // end for ib
 162     //cout<<"\n"; getchar();
 163
 164     fDetx[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDx();
 165     fDetz[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDz();
 166
 167     fDetx[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDx();
 168     fDetz[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDz();
 169
 170     fDetx[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDx();
 171     fDetz[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDz();
 172
 173     fDetx[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDx();
 174     fDetz[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDz();
 175
 176     fDetx[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDx();
 177     fDetz[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDz();
 178
 179     fDetx[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDx();
 180     fDetz[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDz();
 181     //cout<<"    Detx     Detz\n";
 182     //for(Int_t la=0; la<6; la++) cout<<"    "<<fDetx[la]<<"     "<<
 183     //                                 fDetz[la]<<endl;
 184     //getchar();
 185
 186     // allocate memory and define matrices fzmin, fzmax, fphimin and fphimax //
 187     Double_t epsz=1.2;
 188     Double_t epszdrift=0.05;
 189
 190     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 191     Int_t im1, im2, im2max;
 192     for(im1=0; im1<6; im1++) {
 193         im2max=fNdet[im1];
 194         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 195     } // end for im1
 196
 197     for(im1=0; im1<6; im1++) {
 198         im2max=fNdet[im1];
 199         for(im2=0; im2<im2max; im2++) {
 200             g1->GetCenterThetaPhi(im1+1,1,im2+1,det);
 201             if(im2!=0) fzmin[im1][im2]=det(2)-fDetz[im1];
 202             else
 203                 fzmin[im1][im2]=det(2)-(fDetz[im1])*epsz;
 204             if(im2!=(im2max-1)) fzmax[im1][im2]=det(2)+fDetz[im1];
 205             else
 206                 fzmax[im1][im2]=det(2)+fDetz[im1]*epsz;
 207             if(im1==2 || im1==3) {
 208                 fzmin[im1][im2]-=epszdrift;
 209                 fzmax[im1][im2]+=epszdrift;
 210             } // end if im1==2 || im1==3
 211         } // end for im2
 212     } // end for im1
 213
 214     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 215     for(im1=0;im1<6;im1++) {
 216         im2max=fNlad[im1];
 217         fphimin[im1] = new Double_t[im2max];
 218         fphimax[im1] = new Double_t[im2max];
 219     } // end for im1
 220
 221     fphidet = new Double_t*[6];
 222     for(im1=0; im1<6; im1++) {
 223         im2max=fNlad[im1];
 224         fphidet[im1] = new Double_t[im2max];
 225     } // end for im1
 226
 227     //Float_t global[3],local[3];
 228          Double_t global[3],local[3];
 229     Double_t pigre=TMath::Pi();
 230     Double_t xmin,ymin,xmax,ymax;
 231
 232     for(im1=0; im1<6; im1++) {
 233         im2max=fNlad[im1];
 234         for(im2=0; im2<im2max; im2++) {
 235             Int_t idet=2;
 236             g1->GetCenterThetaPhi(im1+1,im2+1,idet,det);
 237             fphidet[im1][im2] = TMath::ATan2(Double_t(det(1)),
 238                                              Double_t(det(0)));
 239             if(fphidet[im1][im2]<0.) fphidet[im1][im2]+=2.*pigre;
 240             local[1]=local[2]=0.;
 241             local[0]= -(fDetx[im1]);
 242             if(im1==0) local[0]= (fDetx[im1]); //to take into account
 243                                                // different reference system
 244             g1->LtoG(im1+1,im2+1,idet,local,global);
 245             xmax=global[0]; ymax=global[1];
 246             local[0]= (fDetx[im1]);
 247             if(im1==0) local[0]= -(fDetx[im1]);//take into account different
 248                                                // reference system
 249             g1->LtoG(im1+1,im2+1,idet,local,global);
 250             xmin=global[0]; ymin=global[1];
 251             fphimin[im1][im2]= TMath::ATan2(ymin,xmin);
 252             if(fphimin[im1][im2]<0.) fphimin[im1][im2]+=2.*pigre;
 253             fphimax[im1][im2]= TMath::ATan2(ymax,xmax);
 254             if(fphimax[im1][im2]<0.) fphimax[im1][im2]+=2.*pigre;
 255         } // end for im2
 256     } // end for im1
 257 //////////////////////////////////////////////////////////////////////////////////////////////////////////
 258 /////////////// allocate memory and define vector fNRecPoints and matrices fRecCylR, fRecCylPhi, fRecCylZ /////////////
 259         gAlice->GetEvent(evnumber);
 260   Int_t NumOfModules = g1->GetIndexMax();
 261   //fRecCylR = new Float_t *[NumOfModules];
 262   fRecCylR = new Double_t *[NumOfModules];
 263   //fRecCylPhi = new Float_t *[NumOfModules];
 264   fRecCylPhi = new Double_t *[NumOfModules];
 265   //fRecCylZ = new Float_t *[NumOfModules];
 266   fRecCylZ = new Double_t *[NumOfModules];
 267   AliITSRecPoint *recp;
 268   fNRecPoints = new Int_t[NumOfModules];
 269
 270                  for(Int_t module=0; module<NumOfModules; module++) {
 271                   fITS->ResetRecPoints();
 272         gAlice->TreeR()->GetEvent(module);
 273                   frecPoints=fITS->RecPoints();
 274                   Int_t nRecPoints=fNRecPoints[module]=frecPoints->GetEntries();
 275                   /*
 276                   fRecCylR[module] = new Float_t[nRecPoints];
 277                   fRecCylPhi[module] = new Float_t[nRecPoints];
 278                   fRecCylZ[module] = new Float_t[nRecPoints];
 279                   */
 280                   fRecCylR[module] = new Double_t[nRecPoints];
 281                   fRecCylPhi[module] = new Double_t[nRecPoints];
 282                   fRecCylZ[module] = new  Double_t[nRecPoints];
 283                   Int_t ind;
 284                   for(ind=0; ind<fNRecPoints[module]; ind++) {
 285                     recp=(AliITSRecPoint*)frecPoints->UncheckedAt(ind);
 286                         // Float_t global[3], local[3];
 287                          Double_t global[3], local[3];
 288                local[0]=recp->GetX();
 289                local[1]=0.;
 290                local[2]= recp->GetZ();
 291                          g1->LtoG(module,local,global);
 292                          /*
 293                          Float_t r = TMath::Sqrt(global[0]*global[0]+global[1]*global[1]);                     // r hit
 294                          Float_t phi = TMath::ATan2(global[1],global[0]); if(phi<0.) phi+=2.*TMath::Pi();      // phi hit
 295           Float_t z = global[2];                                                               // z hit
 296                          */
 297
 298                          Double_t r = TMath::Sqrt(global[0]*global[0]+global[1]*global[1]);                     // r hit
 299                          Double_t phi = TMath::ATan2(global[1],global[0]); if(phi<0.) phi+=2.*TMath::Pi();      // phi hit
 300           Double_t z = global[2];                                                                // z hit
 301
 302                          fRecCylR[module][ind]=r;
 303                          fRecCylPhi[module][ind]=phi;
 304                          fRecCylZ[module][ind]=z;
 305                   }
 306                 }
 307          //}
 308   //}
 309 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 310
 311
 312     ////////// gets magnetic field factor //////////////////////////////
 313
 314     AliMagF * fieldPointer = gAlice->Field();
 315     fFieldFactor = (Double_t)fieldPointer->Factor();
 316     //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
 317 }
 318 //______________________________________________________________________
 319 AliITSTrackerV1::AliITSTrackerV1(const AliITSTrackerV1 &cobj) {
 320     // Origin  A. Badala' and G.S. Pappalardo:
 321     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 322     // copy constructor
 323
 324          *fITS = *cobj.fITS;
 325     *fresult = *cobj.fresult;
 326     fPtref = cobj.fPtref;
 327     fChi2max = cobj.fChi2max;
 328     **fvettid = **cobj.fvettid;
 329     fflagvert = cobj.fflagvert;
 330     Int_t imax=200,jmax=450;
 331     frl = new AliITSRad(imax,jmax);
 332     *frl = *cobj.frl;
 333     fFieldFactor = cobj.fFieldFactor;
 334     Int_t i,im1,im2,im2max;
 335     for(i=0; i<6; i++) {
 336         fNlad[i] = cobj.fNlad[i];
 337         fNdet[i] = cobj.fNdet[i];
 338         fAvrad[i] = cobj.fAvrad[i];
 339         fDetx[i] = cobj.fDetx[i];
 340         fDetz[i] = cobj.fDetz[i];
 341     } // end or i
 342     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 343     for(im1=0; im1<6; im1++) {
 344         im2max=fNdet[im1];
 345         fzmin[im1] = new Double_t[im2max];
 346         fzmax[im1] = new Double_t[im2max];
 347     } // end for im1
 348     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 349     for(im1=0;im1<6;im1++) {
 350         im2max=fNlad[im1];
 351         fphimin[im1] = new Double_t[im2max];
 352         fphimax[im1] = new Double_t[im2max];
 353     } // end for im1
 354
 355     fphidet = new Double_t*[6];
 356     for(im1=0; im1<6; im1++) {
 357         im2max=fNlad[im1];
 358         fphidet[im1] = new Double_t[im2max];
 359     } // end for im1
 360     for(im1=0; im1<6; im1++) {
 361         im2max=fNdet[im1];
 362         for(im2=0; im2<im2max; im2++) {
 363             fzmin[im1][im2]=cobj.fzmin[im1][im2];
 364             fzmax[im1][im2]=cobj.fzmax[im1][im2];
 365         } // end for im2
 366     } // end for im1
 367     for(im1=0; im1<6; im1++) {
 368         im2max=fNlad[im1];
 369         for(im2=0; im2<im2max; im2++) {
 370             fphimin[im1][im2]=cobj.fphimin[im1][im2];
 371             fphimax[im1][im2]=cobj.fphimax[im1][im2];
 372             fphidet[im1][im2]=cobj.fphidet[im1][im2];
 373         } // end for im2
 374     } // end for im2
 375
 376
 377         AliITSgeom *g1 = fITS->GetITSgeom();
 378    Int_t NumOfModules = g1->GetIndexMax();
 379         /*
 380   fRecCylR = new Float_t *[NumOfModules];
 381   fRecCylPhi = new Float_t *[NumOfModules];
 382   fRecCylZ = new Float_t *[NumOfModules];
 383   */
 384   fRecCylR = new Double_t *[NumOfModules];
 385   fRecCylPhi = new Double_t *[NumOfModules];
 386   fRecCylZ = new Double_t *[NumOfModules];
 387   fNRecPoints = new Int_t[NumOfModules];
 388                 for(Int_t module=0; module<NumOfModules; module++) {
 389                   Int_t nRecPoints=fNRecPoints[module]=cobj.fNRecPoints[module];
 390                   /*
 391                   fRecCylR[module] = new Float_t[nRecPoints];
 392                   fRecCylPhi[module] = new Float_t[nRecPoints];
 393                   fRecCylZ[module] = new Float_t[nRecPoints];
 394                   */
 395                   fRecCylR[module] = new Double_t[nRecPoints];
 396                   fRecCylPhi[module] = new Double_t[nRecPoints];
 397                   fRecCylZ[module] = new Double_t[nRecPoints];
 398                   Int_t ind;
 399                   for(ind=0; ind<nRecPoints; ind++) {
 400                          fRecCylR[module][ind]=cobj.fRecCylR[module][ind];
 401                          fRecCylPhi[module][ind]=cobj.fRecCylPhi[module][ind];
 402                          fRecCylZ[module][ind]=cobj.fRecCylZ[module][ind];
 403                   }
 404                 }
 405
 406 }
 407 void AliITSTrackerV1::DelMatrix(Int_t NumOfModules) {
 408   for(Int_t mod=0; mod<NumOfModules; mod++) {
 409     delete fRecCylR[mod];
 410          delete fRecCylPhi[mod];
 411          delete fRecCylZ[mod];
 412   }
 413     delete fRecCylR;
 414          delete fRecCylPhi;
 415          delete fRecCylZ;
 416 }
 417 //______________________________________________________________________
 418 AliITSTrackerV1::~AliITSTrackerV1(){
 419     // Origin  A. Badala' and G.S. Pappalardo:
 420     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 421     // class destructor
 422   delete frl;
 423   delete fNRecPoints;
 424   for(Int_t i=0; i<6; i++) {
 425     delete fzmin[i];
 426          delete fzmax[i];
 427          delete fphimin[i];
 428          delete fphimax[i];
 429          delete fphidet[i];
 430   }
 431
 432   delete fzmin;
 433   delete fzmax;
 434   delete fphimin;
 435   delete fphimax;
 436   delete fphidet;
 437
 438 }
 439 //______________________________________________________________________
 440 AliITSTrackerV1 &AliITSTrackerV1::operator=(AliITSTrackerV1 obj) {
 441     // Origin  A. Badala' and G.S. Pappalardo:
 442     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 443     // assignement operator
 444
 445          *fITS = *obj.fITS;
 446     *fresult = *obj.fresult;
 447     fPtref = obj.fPtref;
 448     fChi2max = obj.fChi2max;
 449     **fvettid = **obj.fvettid;
 450     fflagvert = obj.fflagvert;
 451     Int_t imax=200,jmax=450;
 452     frl = new AliITSRad(imax,jmax);
 453     *frl = *obj.frl;
 454     fFieldFactor = obj.fFieldFactor;
 455     Int_t i;
 456     for(i=0; i<6; i++) {
 457         fNlad[i] = obj.fNlad[i];
 458         fNdet[i] = obj.fNdet[i];
 459         fAvrad[i] = obj.fAvrad[i];
 460         fDetx[i] = obj.fDetx[i];
 461         fDetz[i] = obj.fDetz[i];
 462     } // end for i
 463     fzmin = new Double_t*[6];
 464     fzmax = new Double_t*[6];
 465     Int_t im1, im2, im2max;
 466     for(im1=0; im1<6; im1++) {
 467         im2max=fNdet[im1];
 468         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 469     } // end for im1
 470     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 471     for(im1=0;im1<6;im1++) {
 472         im2max=fNlad[im1];
 473         fphimin[im1] = new Double_t[im2max];
 474         fphimax[im1] = new Double_t[im2max];
 475     } // end for im1
 476
 477     fphidet = new Double_t*[6];
 478     for(im1=0; im1<6; im1++) {
 479         im2max=fNlad[im1];
 480         fphidet[im1] = new Double_t[im2max];
 481     } // end for im1
 482     for(im1=0; im1<6; im1++) {
 483         im2max=fNdet[im1];
 484         for(im2=0; im2<im2max; im2++) {
 485             fzmin[im1][im2]=obj.fzmin[im1][im2];
 486             fzmax[im1][im2]=obj.fzmax[im1][im2];
 487         } // end for im2
 488     } // end for im1
 489     for(im1=0; im1<6; im1++) {
 490         im2max=fNlad[im1];
 491         for(im2=0; im2<im2max; im2++) {
 492             fphimin[im1][im2]=obj.fphimin[im1][im2];
 493             fphimax[im1][im2]=obj.fphimax[im1][im2];
 494             fphidet[im1][im2]=obj.fphidet[im1][im2];
 495         } // end for im2
 496     } // end for im1
 497
 498         AliITSgeom *g1 = fITS->GetITSgeom();
 499    Int_t NumOfModules = g1->GetIndexMax();
 500         /*
 501   fRecCylR = new Float_t *[NumOfModules];
 502   fRecCylPhi = new Float_t *[NumOfModules];
 503   fRecCylZ = new Float_t *[NumOfModules];
 504   */
 505   fRecCylR = new Double_t *[NumOfModules];
 506   fRecCylPhi = new Double_t *[NumOfModules];
 507   fRecCylZ = new Double_t *[NumOfModules];
 508   fNRecPoints = new Int_t[NumOfModules];
 509           for(Int_t module=0; module<NumOfModules; module++) {
 510                   Int_t nRecPoints=fNRecPoints[module]=obj.fNRecPoints[module];
 511                   /*
 512                   fRecCylR[module] = new Float_t[nRecPoints];
 513                   fRecCylPhi[module] = new Float_t[nRecPoints];
 514                   fRecCylZ[module] = new Float_t[nRecPoints];
 515                   */
 516                   fRecCylR[module] = new Double_t[nRecPoints];
 517                   fRecCylPhi[module] = new Double_t[nRecPoints];
 518                   fRecCylZ[module] = new Double_t[nRecPoints];
 519                   Int_t ind;
 520                   for(ind=0; ind<nRecPoints; ind++) {
 521                          fRecCylR[module][ind]=obj.fRecCylR[module][ind];
 522                          fRecCylPhi[module][ind]=obj.fRecCylPhi[module][ind];
 523                          fRecCylZ[module][ind]=obj.fRecCylZ[module][ind];
 524                   }
 525                 }
 526
 527
 528     return *this;
 529 }
 530 //______________________________________________________________________
 531 void AliITSTrackerV1::DoTracking(Int_t evNumber,Int_t minTr,Int_t maxTr,
 532                                  TFile *file, Bool_t realmass) {
 533     // Origin   A. Badala' and G.S. Pappalardo:
 534     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 535     // The method needs the event number, the minimum and maximum order
 536     // number of TPC tracks that
 537     // are to be tracked trough the ITS, and the file where the recpoints
 538     // are registered.
 539     // The method can be called by a macro. It preforms the tracking for
 540     // all good TPC tracks
 541
 542     printf("begin DoTracking - file %p\n",file);
 543
 544     gAlice->GetEvent(evNumber);  //modificato per gestire hbt
 545
 546     AliKalmanTrack *kkprov;
 547     kkprov->SetConvConst(100/0.299792458/0.2/fFieldFactor);
 548
 549     TFile *cf=TFile::Open("AliTPCclusters.root");
 550     AliTPCParam *digp= (AliTPCParam*)cf->Get("75x40_100x60");
 551     if (!digp) { cerr<<"TPC parameters have not been found !\n"; getchar();}
 552
 553     cf->cd();
 554     AliTPCtracker *tracker = new AliTPCtracker(digp,evNumber);
 555
 556     // Load clusters
 557     tracker->LoadInnerSectors();
 558     tracker->LoadOuterSectors();
 559
 560     // Load tracks
 561     TFile *tf=TFile::Open("AliTPCtracksSorted.root");
 562     if (!tf->IsOpen()) {
 563         cerr<<"Can't open AliTPCtracksSorted.root !\n";
 564         return ;
 565     } // end if
 566     TObjArray tracks(200000);
 567     char tname[100];
 568     sprintf(tname,"TreeT_TPC_%d",evNumber);
 569
 570     TTree *tracktree=(TTree*)tf->Get(tname);
 571     if (!tracktree) {cerr<<"Can't get a tree with TPC tracks !\n";}
 572     TBranch *tbranch=tracktree->GetBranch("tracks");
 573     Int_t nentr=(Int_t)tracktree->GetEntries();
 574     Int_t kk;
 575
 576     AliTPCtrack *ioTrackTPC=0;
 577     for (kk=0; kk<nentr; kk++) {
 578         ioTrackTPC=new AliTPCtrack;
 579         tbranch->SetAddress(&ioTrackTPC);
 580         tracktree->GetEvent(kk);
 581         tracker->CookLabel(ioTrackTPC,0.1);
 582         tracks.AddLast(ioTrackTPC);
 583     } // end for kk
 584     delete tracker;
 585     tf->Close();
 586
 587     Int_t nt = tracks.GetEntriesFast();
 588     cerr<<"Number of found tracks "<<nt<<endl;
 589
 590     TVector vec(5);
 591     TTree *tr=gAlice->TreeR();
 592     Int_t nent=(Int_t)tr->GetEntries();
 593     frecPoints = fITS->RecPoints();
 594
 595     Int_t numbpoints;
 596     Int_t totalpoints=0;
 597     Int_t *np = new Int_t[nent];
 598     fvettid = new Int_t* [nent];
 599     Int_t mod;
 600
 601     for (mod=0; mod<nent; mod++) {
 602         fvettid[mod]=0;
 603         fITS->ResetRecPoints();
 604         gAlice->TreeR()->GetEvent(mod);
 605         numbpoints = frecPoints->GetEntries();
 606         totalpoints+=numbpoints;
 607         np[mod] = numbpoints;
 608         //cout<<" mod = "<<mod<<"   numbpoints = "<<numbpoints<<"\n";getchar();
 609         fvettid[mod] = new Int_t[numbpoints];
 610         Int_t ii;
 611         for (ii=0;ii<numbpoints; ii++) *(fvettid[mod]+ii)=0;
 612     } // end for mod
 613
 614     AliTPCtrack *track=0;
 615
 616     if(minTr < 0) {minTr = 0; maxTr = nt-1;}
 617
 618     TVector vgeant(3);
 619
 620     TTree tracktree1("TreeT","Tree with ITS tracks");
 621     AliITSIOTrack *ioTrack=0;
 622     tracktree1.Branch("ITStracks","AliITSIOTrack",&ioTrack,32000,0);
 623
 624    TDatabasePDG * db = new TDatabasePDG;
 625
 626     Int_t j;
 627     for (j=minTr; j<=maxTr; j++) {
 628         track=(AliTPCtrack*)tracks.UncheckedAt(j);
 629         if (!track) continue;
 630
 631         ///   mass definition ////////////////////////
 632     Double_t mass=0.13956995;
 633          Int_t pcode=211;  // a pion by default
 634          if(realmass) {
 635     Int_t TPClabel=TMath::Abs( track->GetLabel() );
 636          TParticle *p = (TParticle*)gAlice->Particle(TPClabel);
 637           pcode=p->GetPdgCode();
 638          // Int_t mothercode=p->GetFirstMother();
 639          //if(mothercode>0 ) numofsecondaries++; else numofprimaries++;
 640          }
 641          //if(!pcode) pcode=211;
 642          if(TMath::Abs(pcode)<20443) mass=db->GetParticle(pcode)->Mass();
 643
 644
 645         ///////////////////////////////////////////////
 646   /*
 647         //////   propagation to the end of TPC //////////////
 648         Double_t xk=77.415;
 649         track->PropagateTo(xk, 28.94, 1.204e-3,mass);    //Ne
 650         xk -=0.01;
 651         track->PropagateTo(xk, 44.77, 1.71,mass);        //Tedlar
 652         xk -=0.04;
 653         track->PropagateTo(xk, 44.86, 1.45,mass);        //kevlar
 654         xk -=2.0;
 655         track->PropagateTo(xk, 41.28, 0.029,mass);       //Nomex
 656         xk-=16;
 657         track->PropagateTo(xk,36.2,1.98e-3,mass); //C02
 658         xk -=0.01;
 659         track->PropagateTo(xk, 24.01, 2.7,mass);         //Al
 660         xk -=0.01;
 661         track->PropagateTo(xk, 44.77, 1.71,mass);        //Tedlar
 662         xk -=0.04;
 663         track->PropagateTo(xk, 44.86, 1.45,mass);        //kevlar
 664         xk -=0.5;
 665         track->PropagateTo(xk, 41.28, 0.029,mass);       //Nomex
 666     ////////////////////////////////////////////////////////////////////
 667    */
 668          //   new propagation to the end of TPC
 669     Double_t xk=80.;
 670    // track->PropagateTo(xk,0.,0.); //Ne if it's still there   //attenzione funziona solo se modifica in TPC
 671         // Double_t xk=77.415;
 672          track->PropagateTo(xk, 28.94, 1.204e-3);
 673     xk-=0.005;
 674     track->PropagateTo(xk, 44.77,1.71); //Tedlar
 675     xk-=0.02;
 676     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 677     xk-=2.0;
 678     track->PropagateTo(xk, 41.28, 0.029);//Nomex
 679     xk-=0.02;
 680     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 681     xk-=0.005;
 682     track->PropagateTo(xk, 44.77, 1.71); //Tedlar
 683
 684     xk=61.;
 685    // track->PropagateTo(xk,0.,0.); //C02
 686          track->PropagateTo(xk,36.2,1.98e-3); //C02        //attenzione funziona solo se modifica in TPC
 687
 688     xk -=0.005;
 689     track->PropagateTo(xk, 24.01, 2.7);    //Al
 690     xk -=0.005;
 691     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 692     xk -=0.02;
 693     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 694     xk -=0.5;
 695     track->PropagateTo(xk, 41.28, 0.029);  //Nomex
 696     xk -=0.02;
 697     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 698     xk -=0.005;
 699     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 700     xk -=0.005;
 701     track->PropagateTo(xk, 24.01, 2.7);    //Al
 702         ////////////////////////////////////////////////////////////////////////////////////////////////////////
 703         AliITSTrackV1 trackITS(*track);
 704         trackITS.PutMass(mass);   //new to add mass to track
 705         if(fresult){ delete fresult; fresult=0;}
 706         fresult = new AliITSTrackV1(trackITS);
 707
 708         AliITSTrackV1 primaryTrack(trackITS);
 709         vgeant=(*fresult).GetVertex();
 710
 711         // Definition of dv and zv for vertex constraint
 712         Double_t sigmaDv=0.0050;  Double_t sigmaZv=0.010;
 713         //Double_t sigmaDv=0.0015;  Double_t sigmaZv=0.0015;
 714         Double_t uniform= gRandom->Uniform();
 715         Double_t signdv;
 716         if(uniform<=0.5) signdv=-1.;
 717         else
 718             signdv=1.;
 719
 720         Double_t vr=TMath::Sqrt(vgeant(0)*vgeant(0)+ vgeant(1)*vgeant(1));
 721         Double_t dv=gRandom->Gaus(signdv*vr,(Float_t)sigmaDv);
 722         Double_t zv=gRandom->Gaus(vgeant(2),(Float_t)sigmaZv);
 723         //cout<<" Dv e Zv = "<<dv<<" "<<zv<<"\n";
 724         trackITS.SetDv(dv);
 725         trackITS.SetZv(zv);
 726         trackITS.SetsigmaDv(sigmaDv);
 727         trackITS.SetsigmaZv(sigmaZv);
 728         (*fresult).SetDv(dv);
 729         (*fresult).SetZv(zv);
 730         (*fresult).SetsigmaDv(sigmaDv);
 731         (*fresult).SetsigmaZv(sigmaZv);
 732         primaryTrack.SetDv(dv);
 733         primaryTrack.SetZv(zv);
 734         primaryTrack.SetsigmaDv(sigmaDv);
 735         primaryTrack.SetsigmaZv(sigmaZv);
 736         primaryTrack.PrimaryTrack(frl);
 737         TVector  d2=primaryTrack.Getd2();
 738         TVector  tgl2=primaryTrack.Gettgl2();
 739         TVector  dtgl=primaryTrack.Getdtgl();
 740         trackITS.Setd2(d2); trackITS.Settgl2(tgl2);
 741         trackITS.Setdtgl(dtgl);
 742         (*fresult).Setd2(d2); (*fresult).Settgl2(tgl2);
 743         (*fresult).Setdtgl(dtgl);
 744         /*
 745           trackITS.SetVertex(vertex); trackITS.SetErrorVertex(ervertex);
 746           (*result).SetVertex(vertex);   (*result).SetErrorVertex(ervertex);
 747         */
 748         TList *list= new TList();
 749
 750         list->AddLast(&trackITS);
 751
 752         fPtref=TMath::Abs( (trackITS).GetPt() );
 753         if(fPtref>1.0) fChi2max=40.;
 754         if(fPtref<=1.0) fChi2max=20.;
 755         if(fPtref<0.4 ) fChi2max=100.;
 756         if(fPtref<0.2 ) fChi2max=40.;
 757         // if(fPtref<0.4 ) fChi2max=30.;
 758         // if(fPtref<0.2 ) fChi2max=20.;
 759         //if(fPtref<0.2 ) fChi2max=10.;
 760         //if(fPtref<0.1 ) fChi2max=5.;
 761         //cout << "\n Pt = " << fPtref <<"\n";  //stampa
 762         RecursiveTracking(list);
 763         list->Delete();
 764         delete list;
 765
 766         Int_t itot=-1;
 767         TVector vecTotLabRef(18);
 768         Int_t lay, k;
 769         for(lay=5; lay>=0; lay--) {
 770             TVector vecLabRef(3);
 771             vecLabRef=(*fresult).GetLabTrack(lay);
 772             Float_t clustZ=(*fresult).GetZclusterTrack( lay);
 773             for(k=0; k<3; k++){
 774                 Int_t lpp=(Int_t)vecLabRef(k);
 775                 if(lpp>=0) {
 776                     TParticle *p=(TParticle*) gAlice->Particle(lpp);
 777                     Int_t pcode=p->GetPdgCode();
 778                     if(pcode==11) vecLabRef(k)=p->GetFirstMother();
 779                 } // end if
 780                 itot++; vecTotLabRef(itot)=vecLabRef(k);
 781                 if(vecLabRef(k)==0. && clustZ == -1.) vecTotLabRef(itot) =-3.;
 782             } // end for k
 783         } // end for lay
 784         Long_t labref;
 785         Int_t freq;
 786         (*fresult).Search(vecTotLabRef, labref, freq);
 787
 788         //if(freq < 6) labref=-labref;        // cinque - sei
 789         if(freq < 5) labref=-labref;        // cinque - sei
 790         (*fresult).SetLabel(labref);
 791
 792         // cout<<" progressive track number = "<<j<<"\r";
 793         // cout<<j<<"\r";
 794         Int_t numOfCluster=(*fresult).GetNumClust();
 795         //cout<<" progressive track number = "<<j<<"\n";    // stampa
 796         Long_t labITS=(*fresult).GetLabel();
 797         //cout << " ITS track label = " << labITS << "\n";      // stampa
 798         Int_t lab=track->GetLabel();
 799         //cout << " TPC track label = " << lab <<"\n";      // stampa
 800         //propagation to vertex
 801
 802         Double_t rbeam=3.;
 803     if((*fresult).DoNotCross(rbeam)) continue;  //no intersection with beampipe
 804         (*fresult).Propagation(rbeam);
 805         Double_t c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44;
 806         (*fresult).GetCElements(c00,
 807                                 c10,c11,
 808                                 c20,c21,c22,
 809                                 c30,c31,c32,c33,
 810                                 c40,c41,c42,c43,c44);
 811
 812         Double_t pt=TMath::Abs((*fresult).GetPt());
 813         Double_t dr=(*fresult).GetD();
 814         Double_t z=(*fresult).GetZ();
 815         Double_t tgl=(*fresult).GetTgl();
 816         Double_t c=(*fresult).GetC();
 817         Double_t cy=c/2.;
 818         Double_t dz=z-(tgl/cy)*TMath::ASin((*fresult).Arga(rbeam));
 819         dz-=vgeant(2);
 820         // cout<<" dr e dz alla fine = "<<dr<<" "<<dz<<"\n"; getchar();
 821         Double_t phi=(*fresult).Getphi();
 822         Double_t phivertex = phi - TMath::ASin((*fresult).ArgA(rbeam));
 823         Double_t duepi=2.*TMath::Pi();
 824         if(phivertex>duepi) phivertex-=duepi;
 825         if(phivertex<0.) phivertex+=duepi;
 826         /////////////////////////////////////////////////////////////
 827         Int_t idmodule,idpoint;
 828         if(numOfCluster >=5)  {            // cinque - sei
 829             //if(numOfCluster ==6)  {            // cinque - sei
 830             AliITSIOTrack outTrack;
 831             ioTrack=&outTrack;
 832             ioTrack->SetStatePhi(phi);
 833             ioTrack->SetStateZ(z);
 834             ioTrack->SetStateD(dr);
 835             ioTrack->SetStateTgl(tgl);
 836             ioTrack->SetStateC(c);
 837             Double_t radius=(*fresult).Getrtrack();
 838             ioTrack->SetRadius(radius);
 839             Int_t charge;
 840             if(c>0.) charge=-1;  else charge=1;
 841             ioTrack->SetCharge(charge);
 842             ioTrack->SetCovMatrix(c00,
 843                                   c10,c11,
 844                                   c20,c21,c22,
 845                                   c30,c31,c32,c33,
 846                                   c40,c41,c42,c43,c44);
 847             Double_t px=pt*TMath::Cos(phivertex);
 848             Double_t py=pt*TMath::Sin(phivertex);
 849             Double_t pz=pt*tgl;
 850             Double_t xtrack=dr*TMath::Sin(phivertex);
 851             Double_t ytrack=dr*TMath::Cos(phivertex);
 852             Double_t ztrack=dz+vgeant(2);
 853             ioTrack->SetPx(px);
 854             ioTrack->SetPy(py);
 855             ioTrack->SetPz(pz);
 856             ioTrack->SetX(xtrack);
 857             ioTrack->SetY(ytrack);
 858             ioTrack->SetZ(ztrack);
 859             ioTrack->SetLabel(labITS);
 860             ioTrack->SetTPCLabel(lab);
 861                  ioTrack->SetDz(dz);
 862             Int_t il;
 863             for(il=0;il<6; il++){
 864                 ioTrack->SetIdPoint(il,(*fresult).GetIdPoint(il));
 865                 ioTrack->SetIdModule(il,(*fresult).GetIdModule(il));
 866             } // end for il
 867             tracktree1.Fill();
 868             for (il=0;il<6;il++) {
 869                 idpoint=(*fresult).GetIdPoint(il);
 870                 idmodule=(*fresult).GetIdModule(il);
 871                 if(idmodule>0.) *(fvettid[idmodule]+idpoint)=1;
 872
 873                 ioTrack->SetIdPoint(il,idpoint);
 874                 ioTrack->SetIdModule(il,idmodule);
 875             } // end for il
 876         } // end if on numOfCluster
 877         //gObjectTable->Print();    // stampa memoria
 878     }  //  end for (int j=minTr; j<=maxTr; j++)
 879     delete db;
 880     static Bool_t first=kTRUE;
 881     static TFile *tfile;
 882     if(first) {
 883         tfile=new TFile("itstracks.root","RECREATE");
 884         //cout<<"I have opened itstracks.root file "<<endl;
 885     } // end if
 886     first=kFALSE;
 887     tfile->cd();
 888     tfile->ls();
 889     char hname[30];
 890     sprintf(hname,"TreeT%d",evNumber);
 891     tracktree1.Write(hname);
 892
 893     TTree *fAli=gAlice->TreeK();
 894     TFile *fileAli=0;
 895     if (fAli) fileAli =fAli->GetCurrentFile();
 896     fileAli->cd();
 897     ////////////////////////////////////////////////////////////////////
 898
 899     printf("delete vectors\n");
 900     if(np) delete [] np;
 901     if(fvettid) delete [] fvettid;
 902     if(fresult) {delete fresult; fresult=0;}
 903 }
 904 //______________________________________________________________________
 905 void AliITSTrackerV1::RecursiveTracking(TList *trackITSlist) {
 906     //   This function perform the recursive tracking in ITS detectors
 907     // reference is a pointer to the final best track
 908     // Origin  A. Badala' and G.S. Pappalardo:
 909     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 910     // The authors thank Mariana Bondila to have help them to resolve some
 911     // problems.  July-2000
 912
 913     //Rlayer[0]=4.; Rlayer[1]=7.;  Rlayer[2]=14.9;
 914     // Rlayer[3]=23.8;  Rlayer[4]=39.1;  Rlayer[5]=43.6; //vecchio
 915
 916     //////////////////////
 917     Float_t sigmaphil[6], sigmazl[6];
 918     sigmaphil[0]=1.44e-6/(fAvrad[0]*fAvrad[0]);
 919     sigmaphil[1]=1.44e-6/(fAvrad[1]*fAvrad[1]);
 920     sigmaphil[2]=1.444e-5/(fAvrad[2]*fAvrad[2]);
 921     sigmaphil[3]=1.444e-5/(fAvrad[3]*fAvrad[3]);
 922     sigmaphil[4]=4e-6/(fAvrad[4]*fAvrad[4]);
 923     sigmaphil[5]=4e-6/(fAvrad[5]*fAvrad[5]);
 924     sigmazl[0]=1e-2;
 925     sigmazl[1]=1e-2;
 926     sigmazl[2]=7.84e-4;
 927     sigmazl[3]=7.84e-4;
 928     sigmazl[4]=0.6889;
 929     sigmazl[5]=0.6889;
 930     ///////////////////////////////////////////////////////////
 931     Int_t index;
 932     AliITSgeom *g1 = fITS->GetITSgeom();
 933     AliITSRecPoint *recp;
 934     for(index =0; index<trackITSlist->GetSize(); index++) {
 935         AliITSTrackV1 *trackITS = (AliITSTrackV1 *) trackITSlist->At(index);
 936         if((*trackITS).GetLayer()==7) fresult->SetChi2(10.223e140);
 937         // cout <<" Layer inizio = "<<(*trackITS).GetLayer()<<"\n";
 938         //  cout<<"fvtrack =" <<"\n";
 939         //  cout << (*trackITS)(0) << " "<<(*trackITS)(1)<<" "
 940         //       <<(*trackITS)(2)<<" "<<(*trackITS)(3)<<" "
 941         //       <<(*trackITS)(4)<<"\n";
 942         //  cout<< " rtrack = "<<(*trackITS).Getrtrack()<<"\n";
 943         //  cout<< " Pt = "<<(*trackITS).GetPt()<<"\n";
 944         //  getchar();
 945         Double_t chi2Now, chi2Ref;
 946         Float_t numClustRef = fresult->GetNumClust();
 947         if((*trackITS).GetLayer()==1 ) {
 948             chi2Now = trackITS->GetChi2();
 949             Float_t numClustNow = trackITS->GetNumClust();
 950             if(trackITS->GetNumClust())
 951                 chi2Now /= (Double_t)trackITS->GetNumClust();
 952             chi2Ref = fresult->GetChi2();
 953             if(fresult->GetNumClust())
 954                 chi2Ref /= (Double_t)fresult->GetNumClust();
 955             //cout<<" chi2Now and chi2Ref = "<<chi2Now<<" "<<chi2Ref<<"\n";
 956             if( numClustNow > numClustRef ) {*fresult = *trackITS;}
 957             if((numClustNow == numClustRef )&&
 958                (chi2Now < chi2Ref))  {
 959                 *fresult = *trackITS;
 960             } // end if
 961             continue;
 962         } // end if
 963
 964         if(trackITS->Getfnoclust()>=2)  continue;
 965         Float_t numClustNow = trackITS->GetNumClust();
 966         if(numClustNow) {
 967             chi2Now = trackITS->GetChi2();
 968
 969             if(numClustNow<numClustRef && chi2Now>fresult->GetChi2()) continue;
 970             //cout<<" chi2Now =  "<<chi2Now<<"\n";
 971
 972             chi2Now/=numClustNow;
 973             if(fPtref > 1.0 && chi2Now > 30.) continue;
 974             if((fPtref >= 0.6 && fPtref<=1.0) && chi2Now > 40.) continue;
 975             // if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 40.) continue;
 976             // if(fPtref <= 0.2 && chi2Now > 8.) continue;
 977             if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 30.) continue;
 978             if(fPtref <= 0.2 && chi2Now > 7.) continue;
 979             /////////////////////////////
 980         } // end if
 981
 982         Int_t layerInit = (*trackITS).GetLayer();
 983         Int_t layernew = layerInit - 2;// -1 for new layer, -1 for matrix index
 984         TList listoftrack;
 985         Int_t ladp, ladm, detp,detm,ladinters,detinters;
 986         Int_t layerfin=layerInit-1;
 987         // cout<<"Prima di intersection \n";
 988         Int_t  outinters=Intersection(*trackITS,layerfin,ladinters,detinters);
 989         // cout<<" outinters = "<<outinters<<"\n";
 990         //  cout<<" Layer ladder detector intersection ="
 991         //      <<layerfin<<" "<<ladinters<<" "<<detinters<<"\n";
 992         //  cout << " phiinters zinters = "<<(*trackITS)(0)
 993         //       << " "<<(*trackITS)(1)<<"\n"; getchar();
 994         if(outinters==-1) continue;
 995         Int_t flaghit=0;
 996         if(outinters==0){
 997             TVector toucLad(9), toucDet(9);
 998             Int_t lycur=layerfin;
 999             ladp=ladinters+1;
1000             ladm=ladinters-1;
1001             if(ladm <= 0) ladm=fNlad[layerfin-1];
1002             if(ladp > fNlad[layerfin-1]) ladp=1;
1003             detp=detinters+1;
1004             detm=detinters-1;
1005             Int_t idetot=1;
1006             /*
1007               toucLad(0)=ladinters; toucLad(1)=ladm; toucLad(2)=ladp;
1008               toucLad(3)=ladinters; toucLad(4)=ladm; toucLad(5)=ladp;
1009               toucLad(6)=ladinters; toucLad(7)=ladm; toucLad(8)=ladp;
1010               toucDet(0)=detinters; toucDet(1)=detinters; toucDet(2)=detinters;
1011               if(detm > 0 && detp <= fNdet[layerfin-1]) {
1012                    idetot=9;
1013                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1014                    toucDet(6)=detp; toucDet(7)=detp; toucDet(8)=detp;
1015               } // end if
1016               if(detm > 0 && detp > fNdet[layerfin-1]) {
1017                    idetot=6;
1018                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1019              } // end if
1020              if(detm <= 0 && detp <= fNdet[layerfin-1]) {
1021                   idetot=6;
1022                   toucDet(3)=detp; toucDet(4)=detp; toucDet(5)=detp;
1023              } // end if
1024             */
1025             Float_t epsphi=5.0, epsz=5.0;
1026             if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1027             // new definition of idetot e toucLad e toucDet to be
1028             // transformed in a method
1029             // these values could be modified
1030             Float_t pigre=TMath::Pi();
1031             Float_t rangephi=5., rangez=5.;
1032             if(layerfin==1 || layerfin ==2){
1033                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1034                                                 (*trackITS).GetSigmaphi());
1035                 rangez = 40.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1036                                               (*trackITS).GetSigmaZ());
1037             } // end if
1038             if(layerfin==3 || layerfin ==4){
1039                 //rangephi=30.*fepsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1040                 //                                 (*trackITS).GetSigmaphi());
1041                 //rangez = 40.*fepsz*TMath::Sqrt(sigmazl[layerfin-1]+
1042                 //                               (*trackITS).GetSigmaZ());
1043                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1044                                                 (*trackITS).GetSigmaphi());
1045                 rangez = 50.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1046                                               (*trackITS).GetSigmaZ());
1047             } // end if
1048             if(layerfin==5 || layerfin ==6){
1049                 rangephi=20.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1050                                                 (*trackITS).GetSigmaphi());
1051                 rangez =5.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1052                                             (*trackITS).GetSigmaZ());
1053             } // end if
1054             Float_t phinters, zinters;
1055             phinters=(*trackITS).Getphi();
1056             zinters=(*trackITS).GetZ();
1057             Float_t distz = 0.0;
1058             Float_t phicm, phicp, distphim, distphip;
1059             phicm=phinters;
1060                  if(phinters>fphimax[layerfin-1][ladm-1]) phicm=phinters-2*pigre;  //corretto il 20-11-2001
1061                  distphim=TMath::Abs(phicm-fphimax[layerfin-1][ladm-1]);  //corretto il 20-11-2001
1062             phicp=phinters;
1063                  //cout<<" fNlad[layerfin-1] e ladp = "<<fNlad[layerfin-1]<<" "<<ladp<<endl;
1064                  if(phinters>fphimin[layerfin-1][ladp-1]) phicp=phinters-2.*pigre;   //corretto il 20-11-2001
1065                  distphip=TMath::Abs(phicp-fphimin[layerfin-1][ladp-1]);      //corretto il 20-11-2001
1066             Int_t flagzmin=0;
1067             Int_t flagzmax=0;
1068             idetot=1;
1069             toucLad(0)=ladinters; toucDet(0)=detinters;
1070             if(detm>0) distz=TMath::Abs(zinters-fzmax[layerfin-1][detm-1]);
1071             if(detm>0 && rangez>=distz){
1072                 flagzmin=1;
1073                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detm;
1074                 if(rangephi>=distphim){
1075                     idetot++;
1076                     toucLad(idetot-1)=ladm;
1077                     toucDet(idetot-1)=detinters;
1078                     idetot++;
1079                     toucLad(idetot-1)=ladm;
1080                     toucDet(idetot-1)=detm;
1081                 } // end if
1082                 if(rangephi>=distphip){
1083                     idetot++;
1084                     toucLad(idetot-1)=ladp;
1085                     toucDet(idetot-1)=detinters;
1086                     idetot++;
1087                     toucLad(idetot-1)=ladp;
1088                     toucDet(idetot-1)=detm;
1089                 } // end if
1090             }  //end detm>0....
1091             if(detp<=fNdet[layerfin-1])
1092                 distz=TMath::Abs(zinters-fzmin[layerfin-1][detp-1]);
1093             if(detp<=fNdet[layerfin-1] && rangez>=distz){
1094                 flagzmax=1;
1095                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detp;
1096                 if(rangephi>=distphim){
1097                     idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detp;
1098                     if(flagzmin == 0) {
1099                         idetot++;
1100                         toucLad(idetot-1)=ladm;
1101                         toucDet(idetot-1)=detinters;
1102                     } // end if
1103                 } // end if
1104                 if(rangephi>=distphip){
1105                     idetot++;
1106                     toucLad(idetot-1)=ladp;
1107                     toucDet(idetot-1)=detp;
1108                     if(flagzmin == 0) {
1109                         idetot++;
1110                         toucLad(idetot-1)=ladp;
1111                         toucDet(idetot-1)=detinters;
1112                     } // end if
1113                 } // end if
1114             }  //end detm<fNdet[.......
1115
1116             if(flagzmin == 0 && flagzmax==0){
1117                 if(rangephi>=distphim){
1118                     idetot++;
1119                     toucLad(idetot-1)=ladm;
1120                     toucDet(idetot-1)=detinters;
1121                 } // end if
1122                 if(rangephi>=distphip){
1123                     idetot++;
1124                     toucLad(idetot-1)=ladp;
1125                     toucDet(idetot-1)=detinters;
1126                 } // end if
1127             } // end if
1128             ////////////////////////////////////////////////////////////
1129             Int_t iriv;
1130             for (iriv=0; iriv<idetot; iriv++) {  //for on detectors
1131                 ///////////////////////////////////////////////////////
1132                 /*** Rec points sorted by module *****/
1133                 /**************************************/
1134                 Int_t indexmod;
1135                 indexmod = g1->GetModuleIndex(lycur,(Int_t)toucLad(iriv),
1136                                               (Int_t)toucDet(iriv));
1137                 fITS->ResetRecPoints();
1138                 gAlice->TreeR()->GetEvent(indexmod);
1139                 Int_t npoints=frecPoints->GetEntries();
1140
1141                 Int_t indnew;
1142                 for(indnew=0; indnew<npoints; indnew++){
1143                     if (*(fvettid[indexmod]+indnew)==0)
1144                         recp =(AliITSRecPoint*)frecPoints->UncheckedAt(indnew);
1145                     else
1146                         continue;
1147                     TVector cluster(3),vecclust(9);
1148                     //vecclust(6)=vecclust(7)=vecclust(8)=-1.;
1149                     Double_t sigma[2];
1150   // now vecclust is with cylindrical cohordinates
1151                vecclust(0)=(Float_t)fRecCylR[indexmod][indnew];
1152                vecclust(1)=(Float_t)fRecCylPhi[indexmod][indnew];
1153                vecclust(2)=(Float_t)fRecCylZ[indexmod][indnew];
1154                     vecclust(3) = (Float_t)recp->fTracks[0];
1155                     vecclust(4) = (Float_t)indnew;
1156                     vecclust(5) = (Float_t)indexmod;
1157                     vecclust(6) = (Float_t)recp->fTracks[0];
1158                     vecclust(7) = (Float_t)recp->fTracks[1];
1159                     vecclust(8) = (Float_t)recp->fTracks[2];
1160                     sigma[0] = (Double_t)  recp->GetSigmaX2();
1161                     sigma[1] = (Double_t) recp->GetSigmaZ2();
1162
1163                          cluster(0)=fRecCylR[indexmod][indnew];
1164           cluster(1)=fRecCylPhi[indexmod][indnew];
1165                          cluster(2)=fRecCylZ[indexmod][indnew];
1166
1167                     // cout<<" layer = "<<play<<"\n";
1168                     // cout<<" cluster prima = "<<vecclust(0)<<" "
1169                     //     <<vecclust(1)<<" "
1170                     //     <<vecclust(2)<<"\n"; getchar();
1171
1172                     Float_t sigmatotphi, sigmatotz;
1173                     // Float_t epsphi=5.0, epsz=5.0;
1174                     //if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1175                     Double_t rTrack=(*trackITS).Getrtrack();
1176                     Double_t sigmaphi=sigma[0]/(rTrack*rTrack);
1177                     sigmatotphi=epsphi*TMath::Sqrt(sigmaphi +
1178                                                    (*trackITS).GetSigmaphi());
1179                     sigmatotz=epsz*TMath::Sqrt(sigma[1] +
1180                                                (*trackITS).GetSigmaZ());
1181                     //cout<<"cluster e sigmatotphi e track = "<<cluster(0)
1182                     //    <<" "<<cluster(1)<<" "<<sigmatotphi<<" "
1183                     //    <<vecclust(3)<<"\n";
1184                     //if(vecclust(3)==481) getchar();
1185                     if(cluster(1)<6. && (*trackITS).Getphi()>6.)
1186                         cluster(1)=cluster(1)+(2.*TMath::Pi());
1187                     if(cluster(1)>6. && (*trackITS).Getphi()<6.)
1188                         cluster(1)=cluster(1)-(2.*TMath::Pi());
1189                     if(TMath::Abs(cluster(1)-(*trackITS).Getphi())>sigmatotphi)
1190                         continue;
1191                     // cout<<" supero sigmaphi \n";
1192                     AliITSTrackV1 *newTrack = new AliITSTrackV1((*trackITS));
1193                     (*newTrack).SetLayer((*trackITS).GetLayer()-1);
1194                     if (TMath::Abs(rTrack-cluster(0))/rTrack>1e-6)
1195                         (*newTrack).Correct(Double_t(cluster(0)));
1196                     //cout<<" cluster(2) e(*newTrack).GetZ()="<<cluster(2)<<" "
1197                     //    << (*newTrack).GetZ()<<"\n";
1198                     if(TMath::Abs(cluster(2)-(*newTrack).GetZ()) > sigmatotz){
1199                         delete newTrack;
1200                         continue;
1201                     } // end if
1202                     Double_t sigmanew[2];
1203                     sigmanew[0]= sigmaphi;
1204                     sigmanew[1]=sigma[1];
1205                     Double_t m[2];
1206                     m[0]=cluster(1);
1207                     m[1]=cluster(2);
1208                     //  Double_t chi2pred=newTrack->GetPredChi2(m,sigmanew);
1209                     // cout<<" chi2pred = "<<chi2pred<<"\n";
1210                     // if(chi2pred>fChi2max) continue; //aggiunto il 30-7-2001
1211                     if(iriv == 0) flaghit=1;
1212                     (*newTrack).AddMS(frl);  // add the multiple scattering
1213                                              //matrix to the covariance matrix
1214                     (*newTrack).AddEL(frl,1.,0);
1215
1216                     if(fflagvert){
1217                         KalmanFilterVert(newTrack,cluster,sigmanew);
1218                         //KalmanFilterVert(newTrack,cluster,sigmanew,chi2pred);
1219                     }else{
1220                         KalmanFilter(newTrack,cluster,sigmanew);
1221                     } // end if
1222                     (*newTrack).PutCluster(layernew, vecclust);
1223                     newTrack->AddClustInTrack();
1224                     listoftrack.AddLast(newTrack);
1225                 }   // end for indnew
1226             }  // end of for on detectors (iriv)
1227         }//end if(outinters==0)
1228
1229         if(flaghit==0 || outinters==-2) {
1230             AliITSTrackV1 *newTrack = new AliITSTrackV1(*trackITS);
1231             (*newTrack).Setfnoclust();
1232             (*newTrack).SetLayer((*trackITS).GetLayer()-1);
1233             (*newTrack).AddMS(frl);  // add the multiple scattering matrix
1234                                      // to the covariance matrix
1235             (*newTrack).AddEL(frl,1.,0);
1236             listoftrack.AddLast(newTrack);
1237         } // end if
1238
1239         //gObjectTable->Print();   // stampa memoria
1240
1241         RecursiveTracking(&listoftrack);
1242         listoftrack.Delete();
1243     } // end of for on tracks (index)
1244
1245     //gObjectTable->Print();   // stampa memoria
1246 }
1247 //______________________________________________________________________
1248 Int_t AliITSTrackerV1::Intersection(AliITSTrackV1 &track,Int_t layer,
1249                                     Int_t &ladder,Int_t &detector) {
1250     // Origin  A. Badala' and G.S. Pappalardo
1251     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1252     // Found the intersection and the detector
1253
1254     Double_t rk=fAvrad[layer-1];
1255     if(track.DoNotCross(rk)){ /*cout<< " Do not cross \n";*/ return -1;}
1256     track.Propagation(rk);
1257     Double_t zinters=track.GetZ();
1258     Double_t phinters=track.Getphi();
1259     //cout<<"zinters = "<<zinters<<"  phinters = "<<phinters<<"\n";
1260
1261     TVector det(9);
1262     TVector listDet(2);
1263     TVector distZCenter(2);
1264
1265     Int_t iz=0;
1266     Int_t iD;
1267     for(iD = 1; iD<= fNdet[layer-1]; iD++) {
1268         if(zinters > fzmin[layer-1][iD-1] && zinters <= fzmax[layer-1][iD-1]) {
1269             if(iz>1) {
1270                 cout<< " Errore su iz in Intersection \n";
1271                 getchar();
1272             }else {
1273                 listDet(iz)= iD; distZCenter(iz)=TMath::Abs(zinters-det(2));
1274                 iz++;
1275             } // end if
1276         } // end if
1277     } // end for iD
1278
1279     if(iz==0) {/* cout<< " No detector along Z \n";*/ return -2;}
1280     detector=Int_t (listDet(0));
1281     if(iz>1 && (distZCenter(0)>distZCenter(1)))   detector=Int_t (listDet(1));
1282
1283     TVector listLad(2);
1284     TVector distPhiCenter(2);
1285     Int_t ip=0;
1286     Double_t pigre=TMath::Pi();
1287     Int_t iLd;
1288     for(iLd = 1; iLd<= fNlad[layer-1]; iLd++) {
1289         Double_t phimin=fphimin[layer-1][iLd-1];
1290         Double_t phimax=fphimax[layer-1][iLd-1];
1291         Double_t phidet=fphidet[layer-1][iLd-1];
1292         Double_t phiconfr=phinters;
1293         if(phimin>phimax) {
1294             //if(phimin <5.5) {cout<<" Error in Intersection for phi \n";
1295             // getchar();}
1296             phimin-=(2.*pigre);
1297             if(phinters>(1.5*pigre)) phiconfr=phinters-(2.*pigre);
1298             if(phidet>(1.5*pigre)) phidet-=(2.*pigre);
1299         } // end if
1300         if(phiconfr>phimin && phiconfr<= phimax) {
1301             if(ip>1) {
1302                 cout<< " Errore su ip in Intersection \n"; getchar();
1303             }else  {
1304                 listLad(ip)= iLd;
1305                 distPhiCenter(ip)=TMath::Abs(phiconfr-phidet); ip++;
1306             } // end if
1307         } // end if
1308     } // end for iLd
1309     if(ip==0) { cout<< " No detector along phi \n"; getchar();}
1310     ladder=Int_t (listLad(0));
1311     if(ip>1 && (distPhiCenter(0)>distPhiCenter(1)))  ladder=Int_t (listLad(1));
1312     return 0;
1313 }
1314 //______________________________________________________________________
1315 void AliITSTrackerV1::KalmanFilter(AliITSTrackV1 *newTrack,TVector &cluster,
1316                                    Double_t sigma[2]){
1317     //Origin  A. Badala' and G.S. Pappalardo:
1318     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1319     // Kalman filter without vertex constraint
1320     ////// Evaluation of the measurement vector ////////////////////////
1321     Double_t m[2];
1322     Double_t rk,phik,zk;
1323     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1324     m[0]=phik;    m[1]=zk;
1325     //////////////////////// Evaluation of the error matrix V  /////////
1326     Double_t v00=sigma[0];
1327     Double_t v11=sigma[1];
1328     ////////////////////////////////////////////////////////////////////
1329     Double_t cin00,cin10,cin20,cin30,cin40,cin11,cin21,cin31,cin41,cin22,
1330              cin32,cin42,cin33,cin43,cin44;
1331
1332     newTrack->GetCElements(cin00,
1333                            cin10,cin11,
1334                            cin20,cin21,cin22,
1335                            cin30,cin31,cin32,cin33,
1336                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1337     Double_t rold00=cin00+v00;
1338     Double_t rold10=cin10;
1339     Double_t rold11=cin11+v11;
1340     ////////////////////// R matrix inversion  /////////////////////////
1341     Double_t det=rold00*rold11-rold10*rold10;
1342     Double_t r00=rold11/det;
1343     Double_t r10=-rold10/det;
1344     Double_t r11=rold00/det;
1345     ////////////////////////////////////////////////////////////////////
1346     Double_t k00=cin00*r00+cin10*r10;
1347     Double_t k01=cin00*r10+cin10*r11;
1348     Double_t k10=cin10*r00+cin11*r10;
1349     Double_t k11=cin10*r10+cin11*r11;
1350     Double_t k20=cin20*r00+cin21*r10;
1351     Double_t k21=cin20*r10+cin21*r11;
1352     Double_t k30=cin30*r00+cin31*r10;
1353     Double_t k31=cin30*r10+cin31*r11;
1354     Double_t k40=cin40*r00+cin41*r10;
1355     Double_t k41=cin40*r10+cin41*r11;
1356     Double_t x0,x1,x2,x3,x4;
1357     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1358     Double_t savex0=x0, savex1=x1;
1359     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1);
1360     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1);
1361     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1);
1362     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1);
1363     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1);
1364     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1365     c00=cin00-k00*cin00-k01*cin10;
1366     c10=cin10-k00*cin10-k01*cin11;
1367     c20=cin20-k00*cin20-k01*cin21;
1368     c30=cin30-k00*cin30-k01*cin31;
1369     c40=cin40-k00*cin40-k01*cin41;
1370     c11=cin11-k10*cin10-k11*cin11;
1371     c21=cin21-k10*cin20-k11*cin21;
1372     c31=cin31-k10*cin30-k11*cin31;
1373     c41=cin41-k10*cin40-k11*cin41;
1374     c22=cin22-k20*cin20-k21*cin21;
1375     c32=cin32-k20*cin30-k21*cin31;
1376     c42=cin42-k20*cin40-k21*cin41;
1377     c33=cin33-k30*cin30-k31*cin31;
1378     c43=cin43-k30*cin40-k31*cin41;
1379     c44=cin44-k40*cin40-k41*cin41;
1380     newTrack->PutXElements(x0,x1,x2,x3,x4);  // put the new state vector
1381     newTrack->PutCElements(c00,
1382                            c10,c11,
1383                            c20,c21,c22,
1384                            c30,c31,c32,c33,
1385                            c40,c41,c42,c43,c44); // put in track the
1386                                                  // new cov matrix
1387     Double_t vmcold00=v00-c00;
1388     Double_t vmcold10=-c10;
1389     Double_t vmcold11=v11-c11;
1390     ////////////////////// Matrix vmc inversion  ///////////////////////
1391     det=vmcold00*vmcold11-vmcold10*vmcold10;
1392     Double_t vmc00=vmcold11/det;
1393     Double_t vmc10=-vmcold10/det;
1394     Double_t vmc11=vmcold00/det;
1395     ////////////////////////////////////////////////////////////////////
1396   Double_t chi2=(m[0]-x0)*( vmc00*(m[0]-x0) + 2.*vmc10*(m[1]-x1) ) +
1397                 (m[1]-x1)*vmc11*(m[1]-x1);
1398   newTrack->SetChi2(newTrack->GetChi2()+chi2);
1399 }
1400 //----------------------------------------------------------------------
1401 //void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1402 //                                       TVector &cluster,Double_t sigma[2]){
1403 void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1404                                        TVector &cluster,Double_t sigma[2]
1405                                        /*, Double_t chi2pred*/){
1406     //Origin  A. Badala' and G.S. Pappalardo:
1407     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1408     // Kalman filter with vertex constraint
1409     ///////////////////// Evaluation of the measurement vector m ////////
1410     Double_t m[4];
1411     Double_t rk,phik,zk;
1412     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1413     m[0]=phik;    m[1]=zk;
1414     Double_t cc=(*newTrack).GetC();
1415     Double_t zv=(*newTrack).GetZv();
1416     Double_t dv=(*newTrack).GetDv();
1417     Double_t cy=cc/2.;
1418     Double_t tgl= (zk-zv)*cy/TMath::ASin(cy*rk);
1419     m[2]=dv;    m[3]=tgl;
1420     /////////////////////// Evaluation of the error matrix V  //////////
1421     Int_t layer=newTrack->GetLayer();
1422     Double_t v00=sigma[0];
1423     Double_t v11=sigma[1];
1424     Double_t v31=sigma[1]/rk;
1425     Double_t sigmaDv=newTrack->GetsigmaDv();
1426     Double_t v22=sigmaDv*sigmaDv  + newTrack->Getd2(layer-1);
1427     Double_t v32=newTrack->Getdtgl(layer-1);
1428     Double_t sigmaZv=newTrack->GetsigmaZv();
1429     Double_t v33=(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+newTrack->Gettgl2(layer-1);
1430     //////////////////////////////////////////////////////////////////
1431     Double_t cin00,cin10,cin11,cin20,cin21,cin22,
1432              cin30,cin31,cin32,cin33,cin40,cin41,cin42,cin43,cin44;
1433     newTrack->GetCElements(cin00,
1434                            cin10,cin11,
1435                            cin20,cin21,cin22,
1436                            cin30,cin31,cin32,cin33,
1437                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1438     Double_t r[4][4];
1439     r[0][0]=cin00+v00;
1440     r[1][0]=cin10;
1441     r[2][0]=cin20;
1442     r[3][0]=cin30;
1443     r[1][1]=cin11+v11;
1444     r[2][1]=cin21;
1445     r[3][1]=cin31+sigma[1]/rk;
1446     r[2][2]=cin22+sigmaDv*sigmaDv+newTrack->Getd2(layer-1);
1447     r[3][2]=cin32+newTrack->Getdtgl(layer-1);
1448     r[3][3]=cin33+(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+
1449                                     newTrack->Gettgl2(layer-1);
1450     r[0][1]=r[1][0]; r[0][2]=r[2][0]; r[0][3]=r[3][0];
1451     r[1][2]=r[2][1]; r[1][3]=r[3][1]; r[2][3]=r[3][2];
1452     /////////////////////  Matrix R inversion //////////////////////////
1453     const Int_t kn=4;
1454     Double_t big, hold;
1455     Double_t d=1.;
1456     Int_t ll[kn],mm[kn];
1457     Int_t i,j,k;
1458
1459     for(k=0; k<kn; k++) {
1460         ll[k]=k;
1461         mm[k]=k;
1462         big=r[k][k];
1463         for(j=k; j<kn ; j++) {
1464             for (i=j; i<kn; i++) {
1465                 if(TMath::Abs(big) < TMath::Abs(r[i][j]) ) {
1466                     big=r[i][j];
1467                     ll[k]=i;
1468                     mm[k]=j;
1469                 } // end if
1470             } // end for i
1471         } // end for j
1472         //
1473         j= ll[k];
1474         if(j > k) {
1475             for(i=0; i<kn; i++) {
1476                 hold=-r[k][i];
1477                 r[k][i]=r[j][i];
1478                 r[j][i]=hold;
1479             } // end for i
1480         }// end if
1481         //
1482         i=mm[k];
1483         if(i > k ) {
1484             for(j=0; j<kn; j++) {
1485                 hold=-r[j][k];
1486                 r[j][k]=r[j][i];
1487                 r[j][i]=hold;
1488             } // end for j
1489         } // end if
1490         //
1491         if(!big) {
1492             d=0.;
1493             cout << "Singular matrix\n";
1494         } // end if
1495         for(i=0; i<kn; i++) {
1496             if(i == k) { continue; }
1497             r[i][k]=r[i][k]/(-big);
1498         } // end for i
1499         //
1500         for(i=0; i<kn; i++) {
1501             hold=r[i][k];
1502             for(j=0; j<kn; j++) {
1503                 if(i == k || j == k) continue;
1504                 r[i][j]=hold*r[k][j]+r[i][j];
1505             } // end for j
1506         } // end of ri
1507         //
1508         for(j=0; j<kn; j++) {
1509             if(j == k) continue;
1510             r[k][j]=r[k][j]/big;
1511         } // end for j
1512         //
1513         d=d*big;
1514         //
1515         r[k][k]=1./big;
1516     } // end for k
1517     //
1518     for(k=kn-1; k>=0; k--) {
1519         i=ll[k];
1520         if(i > k) {
1521             for (j=0; j<kn; j++) {
1522                 hold=r[j][k];
1523                 r[j][k]=-r[j][i];
1524                 r[j][i]=hold;
1525             } // end for j
1526         } // end if i
1527         j=mm[k];
1528         if(j > k) {
1529             for (i=0; i<kn; i++) {
1530                 hold=r[k][i];
1531                 r[k][i]=-r[j][i];
1532                 r[j][i]=hold;
1533             } // end for i
1534         } // end if
1535     } // end for k
1536     ////////////////////////////////////////////////////////////////////
1537     Double_t k00=cin00*r[0][0]+cin10*r[1][0]+cin20*r[2][0]+cin30*r[3][0];
1538     Double_t k01=cin00*r[1][0]+cin10*r[1][1]+cin20*r[2][1]+cin30*r[3][1];
1539     Double_t k02=cin00*r[2][0]+cin10*r[2][1]+cin20*r[2][2]+cin30*r[3][2];
1540     Double_t k03=cin00*r[3][0]+cin10*r[3][1]+cin20*r[3][2]+cin30*r[3][3];
1541     Double_t k10=cin10*r[0][0]+cin11*r[1][0]+cin21*r[2][0]+cin31*r[3][0];
1542     Double_t k11=cin10*r[1][0]+cin11*r[1][1]+cin21*r[2][1]+cin31*r[3][1];
1543     Double_t k12=cin10*r[2][0]+cin11*r[2][1]+cin21*r[2][2]+cin31*r[3][2];
1544     Double_t k13=cin10*r[3][0]+cin11*r[3][1]+cin21*r[3][2]+cin31*r[3][3];
1545     Double_t k20=cin20*r[0][0]+cin21*r[1][0]+cin22*r[2][0]+cin32*r[3][0];
1546     Double_t k21=cin20*r[1][0]+cin21*r[1][1]+cin22*r[2][1]+cin32*r[3][1];
1547     Double_t k22=cin20*r[2][0]+cin21*r[2][1]+cin22*r[2][2]+cin32*r[3][2];
1548     Double_t k23=cin20*r[3][0]+cin21*r[3][1]+cin22*r[3][2]+cin32*r[3][3];
1549     Double_t k30=cin30*r[0][0]+cin31*r[1][0]+cin32*r[2][0]+cin33*r[3][0];
1550     Double_t k31=cin30*r[1][0]+cin31*r[1][1]+cin32*r[2][1]+cin33*r[3][1];
1551     Double_t k32=cin30*r[2][0]+cin31*r[2][1]+cin32*r[2][2]+cin33*r[3][2];
1552     Double_t k33=cin30*r[3][0]+cin31*r[3][1]+cin32*r[3][2]+cin33*r[3][3];
1553     Double_t k40=cin40*r[0][0]+cin41*r[1][0]+cin42*r[2][0]+cin43*r[3][0];
1554     Double_t k41=cin40*r[1][0]+cin41*r[1][1]+cin42*r[2][1]+cin43*r[3][1];
1555     Double_t k42=cin40*r[2][0]+cin41*r[2][1]+cin42*r[2][2]+cin43*r[3][2];
1556     Double_t k43=cin40*r[3][0]+cin41*r[3][1]+cin42*r[3][2]+cin43*r[3][3];
1557
1558     Double_t x0,x1,x2,x3,x4;
1559     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1560     Double_t savex0=x0, savex1=x1, savex2=x2, savex3=x3;
1561     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1)+k02*(m[2]-savex2)+
1562         k03*(m[3]-savex3);
1563     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1)+k12*(m[2]-savex2)+
1564         k13*(m[3]-savex3);
1565     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1)+k22*(m[2]-savex2)+
1566         k23*(m[3]-savex3);
1567     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1)+k32*(m[2]-savex2)+
1568         k33*(m[3]-savex3);
1569     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1)+k42*(m[2]-savex2)+
1570         k43*(m[3]-savex3);
1571     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1572     c00=cin00-k00*cin00-k01*cin10-k02*cin20-k03*cin30;
1573     c10=cin10-k00*cin10-k01*cin11-k02*cin21-k03*cin31;
1574     c20=cin20-k00*cin20-k01*cin21-k02*cin22-k03*cin32;
1575     c30=cin30-k00*cin30-k01*cin31-k02*cin32-k03*cin33;
1576     c40=cin40-k00*cin40-k01*cin41-k02*cin42-k03*cin43;
1577     c11=cin11-k10*cin10-k11*cin11-k12*cin21-k13*cin31;
1578     c21=cin21-k10*cin20-k11*cin21-k12*cin22-k13*cin32;
1579     c31=cin31-k10*cin30-k11*cin31-k12*cin32-k13*cin33;
1580     c41=cin41-k10*cin40-k11*cin41-k12*cin42-k13*cin43;
1581     c22=cin22-k20*cin20-k21*cin21-k22*cin22-k23*cin32;
1582     c32=cin32-k20*cin30-k21*cin31-k22*cin32-k23*cin33;
1583     c42=cin42-k20*cin40-k21*cin41-k22*cin42-k23*cin43;
1584     c33=cin33-k30*cin30-k31*cin31-k32*cin32-k33*cin33;
1585     c43=cin43-k30*cin40-k31*cin41-k32*cin42-k33*cin43;
1586     c44=cin44-k40*cin40-k41*cin41-k42*cin42-k43*cin43;
1587
1588     newTrack->PutXElements(x0,x1,x2,x3,x4); // put the new state vector
1589     newTrack->PutCElements(c00,
1590                            c10,c11,
1591                            c20,c21,c22,
1592                            c30,c31,c32,c33,
1593                            c40,c41,c42,c43,c44); // put in track the
1594                                                  // new cov matrix
1595     Double_t vmc[4][4];
1596     vmc[0][0]=v00-c00; vmc[1][0]=-c10; vmc[2][0]=-c20; vmc[3][0]=-c30;
1597     vmc[1][1]=v11-c11; vmc[2][1]=-c21; vmc[3][1]=v31-c31;
1598     vmc[2][2]=v22-c22; vmc[3][2]=v32-c32;
1599     vmc[3][3]=v33-c33;
1600     vmc[0][1]=vmc[1][0]; vmc[0][2]=vmc[2][0]; vmc[0][3]=vmc[3][0];
1601     vmc[1][2]=vmc[2][1]; vmc[1][3]=vmc[3][1];
1602     vmc[2][3]=vmc[3][2];
1603     /////////////////////// vmc matrix inversion ///////////////////////
1604     d=1.;
1605     for(k=0; k<kn; k++) {
1606         ll[k]=k;
1607         mm[k]=k;
1608         big=vmc[k][k];
1609         for(j=k; j<kn ; j++) {
1610             for (i=j; i<kn; i++) {
1611                 if(TMath::Abs(big) < TMath::Abs(vmc[i][j]) ) {
1612                     big=vmc[i][j];
1613                     ll[k]=i;
1614                     mm[k]=j;
1615                 } // end if
1616             } // end for i
1617         } // end for j
1618         //
1619         j= ll[k];
1620         if(j > k) {
1621             for(i=0; i<kn; i++) {
1622                 hold=-vmc[k][i];
1623                 vmc[k][i]=vmc[j][i];
1624                 vmc[j][i]=hold;
1625             } // end for i
1626         } // end if
1627         //
1628         i=mm[k];
1629         if(i > k ) {
1630             for(j=0; j<kn; j++) {
1631                 hold=-vmc[j][k];
1632                 vmc[j][k]=vmc[j][i];
1633                 vmc[j][i]=hold;
1634             } // end for j
1635         } // end if
1636         //
1637         if(!big) {
1638             d=0.;
1639             cout << "Singular matrix\n";
1640         } // end if
1641         for(i=0; i<kn; i++) {
1642             if(i == k) continue;
1643             vmc[i][k]=vmc[i][k]/(-big);
1644         }    // end for i
1645         //
1646         for(i=0; i<kn; i++) {
1647             hold=vmc[i][k];
1648             for(j=0; j<kn; j++) {
1649                 if(i == k || j == k) continue;
1650                 vmc[i][j]=hold*vmc[k][j]+vmc[i][j];
1651             } // end for j
1652         } // end for i
1653         //
1654         for(j=0; j<kn; j++) {
1655             if(j == k) continue;
1656             vmc[k][j]=vmc[k][j]/big;
1657         } // end for j
1658         //
1659         d=d*big;
1660         //
1661         vmc[k][k]=1./big;
1662     }  // end for k
1663     //
1664     for(k=kn-1; k>=0; k--) {
1665         i=ll[k];
1666         if(i > k) {
1667             for (j=0; j<kn; j++) {
1668                 hold=vmc[j][k];
1669                 vmc[j][k]=-vmc[j][i];
1670                 vmc[j][i]=hold;
1671             } // end for j
1672         } // end if i>k
1673         j=mm[k];
1674         if(j > k) {
1675             for (i=0; i<kn; i++) {
1676                 hold=vmc[k][i];
1677                 vmc[k][i]=-vmc[j][i];
1678                 vmc[j][i]=hold;
1679             } // end for i
1680         } // end if j>k
1681     } // end for k
1682     ////////////////////////////////////////////////////////////////////
1683     Double_t chi2=(m[0]-x0)*( vmc[0][0]*(m[0]-x0) + 2.*vmc[1][0]*(m[1]-x1) +
1684                               2.*vmc[2][0]*(m[2]-x2)+ 2.*vmc[3][0]*(m[3]-x3) )+
1685         (m[1]-x1)* ( vmc[1][1]*(m[1]-x1) + 2.*vmc[2][1]*(m[2]-x2)+
1686                      2.*vmc[3][1]*(m[3]-x3) ) +
1687         (m[2]-x2)* ( vmc[2][2]*(m[2]-x2)+ 2.*vmc[3][2]*(m[3]-x3) ) +
1688         (m[3]-x3)*vmc[3][3]*(m[3]-x3);
1689     //cout<<" chi2 kalman = "<<chi2<<"\n";  getchar();
1690     newTrack->SetChi2(newTrack->GetChi2()+chi2);
1691     //   newTrack->SetChi2(newTrack->GetChi2()+chi2pred);
1692 }