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 1.22  2002/10/22 14:45:36  alibrary
  19 Introducing Riostream.h
  20
  21 Revision 1.21  2002/02/05 09:12:26  hristov
  22 Small mods for gcc 3.02
  23
  24 Revision 1.20  2001/11/21 14:47:45  barbera
  25 Some unuseful print-out commented out
  26
  27 Revision 1.19  2001/11/21 10:49:07  barbera
  28 Bug correction suggested by Rene done
  29
  30 Revision 1.18  2001/11/20 15:46:17  barbera
  31 Point coordinated are calculated in cylindrical reference frame once and for all at the beginning of tracking V1
  32
  33 Revision 1.10.2.1  2001/10/24 07:26:04  hristov
  34 All the changes from the head are merged with the release
  35
  36 Revision 1.14  2001/10/24 07:19:57  hristov
  37 Some pointer correctly initialised in one of the constructors
  38
  39 Revision 1.13  2001/10/21 19:17:12  hristov
  40 Several pointers were set to zero in the default constructors to avoid memory management problems
  41
  42 Revision 1.12  2001/10/19 21:32:35  nilsen
  43 Minor changes to remove compliation warning on gcc 2.92.2 compiler, and
  44 cleanded up a little bit of code.
  45
  46 */
  47 //     The purpose of this class is to permorm the ITS tracking. The
  48 // constructor has the task to inizialize some private members. The method
  49 // DoTracking is written to be called by a macro. It gets the event number,
  50 // the minimum and maximum order number of TPC tracks that are to be tracked
  51 // trough the ITS, and the file where the recpoints are registered. The
  52 // method Recursivetracking is a recursive function that performs the
  53 // tracking trough the ITS The method Intersection found the layer, ladder
  54 // and detector whre the intersection take place and caluclate the
  55 // cohordinates of this intersection. It returns an integer that is 0 if the
  56 // intersection has been found successfully. The two mwthods Kalmanfilter
  57 // and kalmanfiltervert operate the kalmanfilter without and with the vertex
  58 // imposition respectively. The authors thank Mariana Bondila to have help
  59 // them to resolve some problems.  July-2000
  60
  61 #include <Riostream.h>
  62 #include <Riostream.h>
  63 #include <TMath.h>
  64 #include <TBranch.h>
  65 #include <TVector.h>
  66 #include <TFile.h>
  67 #include <TTree.h>
  68 #include <TStopwatch.h>
  69
  70 #include "TParticle.h"
  71 #include "AliRun.h"
  72 #include "AliITS.h"
  73 #include "AliITSsegmentationSSD.h"
  74 #include "AliITSgeomSPD.h"
  75 #include "AliITSgeomSDD.h"
  76 #include "AliITSgeomSSD.h"
  77 #include "AliITSgeom.h"
  78 #include "AliITSRecPoint.h"
  79 #include "stdlib.h"
  80 #include "AliKalmanTrack.h"
  81 #include "AliMagF.h"
  82 #include "AliITSTrackV1.h"
  83 #include "AliITSIOTrack.h"
  84 #include "AliITSRad.h"
  85 #include "../TPC/AliTPCtracker.h"
  86 #include "AliITSTrackerV1.h"
  87 #include "AliITSVertex.h"
  88
  89 ClassImp(AliITSTrackerV1)
  90  //______________________________________________________________________
  91 AliITSTrackerV1::AliITSTrackerV1() {
  92   //Default constructor
  93   fITS = 0;
  94   fresult = 0;
  95   fPtref=0.;
  96   fChi2max=0.;
  97   //fepsphi=0.;
  98   //fepsz=0.;
  99   frecPoints = 0;
 100   fvettid = 0;
 101   fflagvert=0;
 102   frl = 0;
 103   Int_t ia;
 104   for(ia=0; ia<6; ia++) {
 105   fNlad[ia]=0;
 106   fNdet[ia]=0;
 107   fAvrad[ia]=0.;
 108   fDetx[ia]=0.;
 109   fDetz[ia]=0.;
 110   } // end for ia
 111   fzmin = 0;
 112   fzmax = 0;
 113   fphimin = 0;
 114   fphimax = 0;
 115   fphidet = 0;
 116   fNRecPoints=0;
 117   fRecCylR=0;
 118   fRecCylPhi=0;
 119   fRecCylZ=0;
 120   fFieldFactor=0;
 121 }
 122 //______________________________________________________________________
 123 AliITSTrackerV1::AliITSTrackerV1(AliITS* IITTSS, Int_t evnumber, Bool_t flag) {
 124     //Origin   A. Badala' and G.S. Pappalardo:
 125     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 126     // Class constructor. It does some initializations.
 127
 128   //PH Initialisation taken from the default constructor
 129     fITS      = IITTSS;
 130     fresult = 0;
 131     fPtref    = 0.;
 132     fChi2max  =0.;
 133     frecPoints = 0;
 134     fvettid = 0;
 135     fflagvert = flag;
 136     frl = 0;
 137     fzmin = 0;
 138     fzmax = 0;
 139     fphimin = 0;
 140     fphimax = 0;
 141     fphidet = 0;
 142
 143     Int_t imax = 200,jmax = 450;
 144     frl       = new AliITSRad(imax,jmax);
 145
 146     //////////  gets information on geometry /////////////////////////////
 147          AliITSgeom *g1 = fITS->GetITSgeom();
 148     Int_t ll=1, dd=1;
 149     TVector det(9);
 150
 151     Int_t ia;
 152     for(ia=0; ia<6; ia++) {
 153         fNlad[ia]=g1->GetNladders(ia+1);
 154         fNdet[ia]=g1->GetNdetectors(ia+1);
 155         //cout<<fNlad[i]<<" "<<fNdet[i]<<"\n";
 156     } // end for ia
 157
 158     //cout<<" mean radius = ";
 159     Int_t ib;
 160     for(ib=0; ib<6; ib++) {
 161         g1->GetCenterThetaPhi(ib+1,ll,dd,det);
 162         Double_t r1=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 163         g1->GetCenterThetaPhi(ib+1,ll,dd+1,det);
 164         Double_t r2=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 165         fAvrad[ib]=(r1+r2)/2.;
 166         //cout<<fAvrad[ib]<<" ";
 167     } // end for ib
 168     //cout<<"\n"; getchar();
 169
 170     fDetx[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDx();
 171     fDetz[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDz();
 172
 173     fDetx[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDx();
 174     fDetz[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDz();
 175
 176     fDetx[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDx();
 177     fDetz[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDz();
 178
 179     fDetx[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDx();
 180     fDetz[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDz();
 181
 182     fDetx[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDx();
 183     fDetz[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDz();
 184
 185     fDetx[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDx();
 186     fDetz[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDz();
 187     //cout<<"    Detx     Detz\n";
 188     //for(Int_t la=0; la<6; la++) cout<<"    "<<fDetx[la]<<"     "<<
 189     //                                 fDetz[la]<<endl;
 190     //getchar();
 191
 192     // allocate memory and define matrices fzmin, fzmax, fphimin and fphimax //
 193     Double_t epsz=1.2;
 194     Double_t epszdrift=0.05;
 195
 196     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 197     Int_t im1, im2, im2max;
 198     for(im1=0; im1<6; im1++) {
 199         im2max=fNdet[im1];
 200         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 201     } // end for im1
 202
 203     for(im1=0; im1<6; im1++) {
 204         im2max=fNdet[im1];
 205         for(im2=0; im2<im2max; im2++) {
 206             g1->GetCenterThetaPhi(im1+1,1,im2+1,det);
 207             if(im2!=0) fzmin[im1][im2]=det(2)-fDetz[im1];
 208             else
 209                 fzmin[im1][im2]=det(2)-(fDetz[im1])*epsz;
 210             if(im2!=(im2max-1)) fzmax[im1][im2]=det(2)+fDetz[im1];
 211             else
 212                 fzmax[im1][im2]=det(2)+fDetz[im1]*epsz;
 213             if(im1==2 || im1==3) {
 214                 fzmin[im1][im2]-=epszdrift;
 215                 fzmax[im1][im2]+=epszdrift;
 216             } // end if im1==2 || im1==3
 217         } // end for im2
 218     } // end for im1
 219
 220     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 221     for(im1=0;im1<6;im1++) {
 222         im2max=fNlad[im1];
 223         fphimin[im1] = new Double_t[im2max];
 224         fphimax[im1] = new Double_t[im2max];
 225     } // end for im1
 226
 227     fphidet = new Double_t*[6];
 228     for(im1=0; im1<6; im1++) {
 229         im2max=fNlad[im1];
 230         fphidet[im1] = new Double_t[im2max];
 231     } // end for im1
 232
 233     //Float_t global[3],local[3];
 234          Double_t global[3],local[3];
 235     Double_t pigre=TMath::Pi();
 236     Double_t xmin,ymin,xmax,ymax;
 237
 238     for(im1=0; im1<6; im1++) {
 239         im2max=fNlad[im1];
 240         for(im2=0; im2<im2max; im2++) {
 241             Int_t idet=2;
 242             g1->GetCenterThetaPhi(im1+1,im2+1,idet,det);
 243             fphidet[im1][im2] = TMath::ATan2(Double_t(det(1)),
 244                                              Double_t(det(0)));
 245             if(fphidet[im1][im2]<0.) fphidet[im1][im2]+=2.*pigre;
 246             local[1]=local[2]=0.;
 247             local[0]= -(fDetx[im1]);
 248             if(im1==0) local[0]= (fDetx[im1]); //to take into account
 249                                                // different reference system
 250             g1->LtoG(im1+1,im2+1,idet,local,global);
 251             xmax=global[0]; ymax=global[1];
 252             local[0]= (fDetx[im1]);
 253             if(im1==0) local[0]= -(fDetx[im1]);//take into account different
 254                                                // reference system
 255             g1->LtoG(im1+1,im2+1,idet,local,global);
 256             xmin=global[0]; ymin=global[1];
 257             fphimin[im1][im2]= TMath::ATan2(ymin,xmin);
 258             if(fphimin[im1][im2]<0.) fphimin[im1][im2]+=2.*pigre;
 259             fphimax[im1][im2]= TMath::ATan2(ymax,xmax);
 260             if(fphimax[im1][im2]<0.) fphimax[im1][im2]+=2.*pigre;
 261         } // end for im2
 262     } // end for im1
 263 //////////////////////////////////////////////////////////////////////////////////////////////////////////
 264 /////////////// allocate memory and define vector fNRecPoints and matrices fRecCylR, fRecCylPhi, fRecCylZ /////////////
 265         gAlice->GetEvent(evnumber);
 266   Int_t NumOfModules = g1->GetIndexMax();
 267   //fRecCylR = new Float_t *[NumOfModules];
 268   fRecCylR = new Double_t *[NumOfModules];
 269   //fRecCylPhi = new Float_t *[NumOfModules];
 270   fRecCylPhi = new Double_t *[NumOfModules];
 271   //fRecCylZ = new Float_t *[NumOfModules];
 272   fRecCylZ = new Double_t *[NumOfModules];
 273   AliITSRecPoint *recp;
 274   fNRecPoints = new Int_t[NumOfModules];
 275
 276                  for(Int_t module=0; module<NumOfModules; module++) {
 277                   fITS->ResetRecPoints();
 278         gAlice->TreeR()->GetEvent(module);
 279                   frecPoints=fITS->RecPoints();
 280                   Int_t nRecPoints=fNRecPoints[module]=frecPoints->GetEntries();
 281                   /*
 282                   fRecCylR[module] = new Float_t[nRecPoints];
 283                   fRecCylPhi[module] = new Float_t[nRecPoints];
 284                   fRecCylZ[module] = new Float_t[nRecPoints];
 285                   */
 286                   fRecCylR[module] = new Double_t[nRecPoints];
 287                   fRecCylPhi[module] = new Double_t[nRecPoints];
 288                   fRecCylZ[module] = new  Double_t[nRecPoints];
 289                   Int_t ind;
 290                   for(ind=0; ind<fNRecPoints[module]; ind++) {
 291                     recp=(AliITSRecPoint*)frecPoints->UncheckedAt(ind);
 292                         // Float_t global[3], local[3];
 293                          Double_t global[3], local[3];
 294                local[0]=recp->GetX();
 295                local[1]=0.;
 296                local[2]= recp->GetZ();
 297                          g1->LtoG(module,local,global);
 298                          /*
 299                          Float_t r = TMath::Sqrt(global[0]*global[0]+global[1]*global[1]);                     // r hit
 300                          Float_t phi = TMath::ATan2(global[1],global[0]); if(phi<0.) phi+=2.*TMath::Pi();      // phi hit
 301           Float_t z = global[2];                                                               // z hit
 302                          */
 303
 304                          Double_t r = TMath::Sqrt(global[0]*global[0]+global[1]*global[1]);                     // r hit
 305                          Double_t phi = TMath::ATan2(global[1],global[0]); if(phi<0.) phi+=2.*TMath::Pi();      // phi hit
 306           Double_t z = global[2];                                                                // z hit
 307
 308                          fRecCylR[module][ind]=r;
 309                          fRecCylPhi[module][ind]=phi;
 310                          fRecCylZ[module][ind]=z;
 311                   }
 312                 }
 313          //}
 314   //}
 315 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 316
 317
 318     ////////// gets magnetic field factor //////////////////////////////
 319
 320     AliMagF * fieldPointer = gAlice->Field();
 321     fFieldFactor = (Double_t)fieldPointer->Factor();
 322     //cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
 323 }
 324 //______________________________________________________________________
 325 AliITSTrackerV1::AliITSTrackerV1(const AliITSTrackerV1 &cobj) {
 326     // Origin  A. Badala' and G.S. Pappalardo:
 327     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 328     // copy constructor
 329
 330          *fITS = *cobj.fITS;
 331     *fresult = *cobj.fresult;
 332     fPtref = cobj.fPtref;
 333     fChi2max = cobj.fChi2max;
 334     **fvettid = **cobj.fvettid;
 335     fflagvert = cobj.fflagvert;
 336     Int_t imax=200,jmax=450;
 337     frl = new AliITSRad(imax,jmax);
 338     *frl = *cobj.frl;
 339     fFieldFactor = cobj.fFieldFactor;
 340     Int_t i,im1,im2,im2max;
 341     for(i=0; i<6; i++) {
 342         fNlad[i] = cobj.fNlad[i];
 343         fNdet[i] = cobj.fNdet[i];
 344         fAvrad[i] = cobj.fAvrad[i];
 345         fDetx[i] = cobj.fDetx[i];
 346         fDetz[i] = cobj.fDetz[i];
 347     } // end or i
 348     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 349     for(im1=0; im1<6; im1++) {
 350         im2max=fNdet[im1];
 351         fzmin[im1] = new Double_t[im2max];
 352         fzmax[im1] = new Double_t[im2max];
 353     } // end for im1
 354     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 355     for(im1=0;im1<6;im1++) {
 356         im2max=fNlad[im1];
 357         fphimin[im1] = new Double_t[im2max];
 358         fphimax[im1] = new Double_t[im2max];
 359     } // end for im1
 360
 361     fphidet = new Double_t*[6];
 362     for(im1=0; im1<6; im1++) {
 363         im2max=fNlad[im1];
 364         fphidet[im1] = new Double_t[im2max];
 365     } // end for im1
 366     for(im1=0; im1<6; im1++) {
 367         im2max=fNdet[im1];
 368         for(im2=0; im2<im2max; im2++) {
 369             fzmin[im1][im2]=cobj.fzmin[im1][im2];
 370             fzmax[im1][im2]=cobj.fzmax[im1][im2];
 371         } // end for im2
 372     } // end for im1
 373     for(im1=0; im1<6; im1++) {
 374         im2max=fNlad[im1];
 375         for(im2=0; im2<im2max; im2++) {
 376             fphimin[im1][im2]=cobj.fphimin[im1][im2];
 377             fphimax[im1][im2]=cobj.fphimax[im1][im2];
 378             fphidet[im1][im2]=cobj.fphidet[im1][im2];
 379         } // end for im2
 380     } // end for im2
 381
 382
 383         AliITSgeom *g1 = fITS->GetITSgeom();
 384    Int_t NumOfModules = g1->GetIndexMax();
 385         /*
 386   fRecCylR = new Float_t *[NumOfModules];
 387   fRecCylPhi = new Float_t *[NumOfModules];
 388   fRecCylZ = new Float_t *[NumOfModules];
 389   */
 390   fRecCylR = new Double_t *[NumOfModules];
 391   fRecCylPhi = new Double_t *[NumOfModules];
 392   fRecCylZ = new Double_t *[NumOfModules];
 393   fNRecPoints = new Int_t[NumOfModules];
 394                 for(Int_t module=0; module<NumOfModules; module++) {
 395                   Int_t nRecPoints=fNRecPoints[module]=cobj.fNRecPoints[module];
 396                   /*
 397                   fRecCylR[module] = new Float_t[nRecPoints];
 398                   fRecCylPhi[module] = new Float_t[nRecPoints];
 399                   fRecCylZ[module] = new Float_t[nRecPoints];
 400                   */
 401                   fRecCylR[module] = new Double_t[nRecPoints];
 402                   fRecCylPhi[module] = new Double_t[nRecPoints];
 403                   fRecCylZ[module] = new Double_t[nRecPoints];
 404                   Int_t ind;
 405                   for(ind=0; ind<nRecPoints; ind++) {
 406                          fRecCylR[module][ind]=cobj.fRecCylR[module][ind];
 407                          fRecCylPhi[module][ind]=cobj.fRecCylPhi[module][ind];
 408                          fRecCylZ[module][ind]=cobj.fRecCylZ[module][ind];
 409                   }
 410                 }
 411
 412 }
 413 void AliITSTrackerV1::DelMatrix(Int_t NumOfModules) {
 414   for(Int_t mod=0; mod<NumOfModules; mod++) {
 415     delete fRecCylR[mod];
 416          delete fRecCylPhi[mod];
 417          delete fRecCylZ[mod];
 418   }
 419     delete fRecCylR;
 420          delete fRecCylPhi;
 421          delete fRecCylZ;
 422 }
 423 //______________________________________________________________________
 424 AliITSTrackerV1::~AliITSTrackerV1(){
 425     // Origin  A. Badala' and G.S. Pappalardo:
 426     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 427     // class destructor
 428   delete frl;
 429   delete fNRecPoints;
 430   for(Int_t i=0; i<6; i++) {
 431     delete fzmin[i];
 432          delete fzmax[i];
 433          delete fphimin[i];
 434          delete fphimax[i];
 435          delete fphidet[i];
 436   }
 437
 438   delete fzmin;
 439   delete fzmax;
 440   delete fphimin;
 441   delete fphimax;
 442   delete fphidet;
 443
 444 }
 445 //______________________________________________________________________
 446 AliITSTrackerV1 &AliITSTrackerV1::operator=(AliITSTrackerV1 obj) {
 447     // Origin  A. Badala' and G.S. Pappalardo:
 448     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 449     // assignement operator
 450
 451          *fITS = *obj.fITS;
 452     *fresult = *obj.fresult;
 453     fPtref = obj.fPtref;
 454     fChi2max = obj.fChi2max;
 455     **fvettid = **obj.fvettid;
 456     fflagvert = obj.fflagvert;
 457     Int_t imax=200,jmax=450;
 458     frl = new AliITSRad(imax,jmax);
 459     *frl = *obj.frl;
 460     fFieldFactor = obj.fFieldFactor;
 461     Int_t i;
 462     for(i=0; i<6; i++) {
 463         fNlad[i] = obj.fNlad[i];
 464         fNdet[i] = obj.fNdet[i];
 465         fAvrad[i] = obj.fAvrad[i];
 466         fDetx[i] = obj.fDetx[i];
 467         fDetz[i] = obj.fDetz[i];
 468     } // end for i
 469     fzmin = new Double_t*[6];
 470     fzmax = new Double_t*[6];
 471     Int_t im1, im2, im2max;
 472     for(im1=0; im1<6; im1++) {
 473         im2max=fNdet[im1];
 474         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 475     } // end for im1
 476     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 477     for(im1=0;im1<6;im1++) {
 478         im2max=fNlad[im1];
 479         fphimin[im1] = new Double_t[im2max];
 480         fphimax[im1] = new Double_t[im2max];
 481     } // end for im1
 482
 483     fphidet = new Double_t*[6];
 484     for(im1=0; im1<6; im1++) {
 485         im2max=fNlad[im1];
 486         fphidet[im1] = new Double_t[im2max];
 487     } // end for im1
 488     for(im1=0; im1<6; im1++) {
 489         im2max=fNdet[im1];
 490         for(im2=0; im2<im2max; im2++) {
 491             fzmin[im1][im2]=obj.fzmin[im1][im2];
 492             fzmax[im1][im2]=obj.fzmax[im1][im2];
 493         } // end for im2
 494     } // end for im1
 495     for(im1=0; im1<6; im1++) {
 496         im2max=fNlad[im1];
 497         for(im2=0; im2<im2max; im2++) {
 498             fphimin[im1][im2]=obj.fphimin[im1][im2];
 499             fphimax[im1][im2]=obj.fphimax[im1][im2];
 500             fphidet[im1][im2]=obj.fphidet[im1][im2];
 501         } // end for im2
 502     } // end for im1
 503
 504         AliITSgeom *g1 = fITS->GetITSgeom();
 505    Int_t NumOfModules = g1->GetIndexMax();
 506         /*
 507   fRecCylR = new Float_t *[NumOfModules];
 508   fRecCylPhi = new Float_t *[NumOfModules];
 509   fRecCylZ = new Float_t *[NumOfModules];
 510   */
 511   fRecCylR = new Double_t *[NumOfModules];
 512   fRecCylPhi = new Double_t *[NumOfModules];
 513   fRecCylZ = new Double_t *[NumOfModules];
 514   fNRecPoints = new Int_t[NumOfModules];
 515           for(Int_t module=0; module<NumOfModules; module++) {
 516                   Int_t nRecPoints=fNRecPoints[module]=obj.fNRecPoints[module];
 517                   /*
 518                   fRecCylR[module] = new Float_t[nRecPoints];
 519                   fRecCylPhi[module] = new Float_t[nRecPoints];
 520                   fRecCylZ[module] = new Float_t[nRecPoints];
 521                   */
 522                   fRecCylR[module] = new Double_t[nRecPoints];
 523                   fRecCylPhi[module] = new Double_t[nRecPoints];
 524                   fRecCylZ[module] = new Double_t[nRecPoints];
 525                   Int_t ind;
 526                   for(ind=0; ind<nRecPoints; ind++) {
 527                          fRecCylR[module][ind]=obj.fRecCylR[module][ind];
 528                          fRecCylPhi[module][ind]=obj.fRecCylPhi[module][ind];
 529                          fRecCylZ[module][ind]=obj.fRecCylZ[module][ind];
 530                   }
 531                 }
 532
 533
 534     return *this;
 535 }
 536 //______________________________________________________________________
 537 void AliITSTrackerV1::DoTracking(Int_t evNumber,Int_t minTr,Int_t maxTr,
 538                                  TFile *file, Bool_t realmass) {
 539     // Origin   A. Badala' and G.S. Pappalardo:
 540     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 541     // The method needs the event number, the minimum and maximum order
 542     // number of TPC tracks that
 543     // are to be tracked trough the ITS, and the file where the recpoints
 544     // are registered.
 545     // The method can be called by a macro. It preforms the tracking for
 546     // all good TPC tracks
 547
 548     printf("begin DoTracking - file %p\n",file);
 549
 550     gAlice->GetEvent(evNumber);  //modificato per gestire hbt
 551
 552     AliKalmanTrack *kkprov;
 553     kkprov->SetConvConst(100/0.299792458/0.2/fFieldFactor);
 554
 555     TFile *cf=TFile::Open("AliTPCclusters.root");
 556     AliTPCParam *digp= (AliTPCParam*)cf->Get("75x40_100x60_150x60");
 557     if (!digp) { cerr<<"TPC parameters have not been found !\n"; getchar();}
 558
 559     cf->cd();
 560     AliTPCtracker *tracker = new AliTPCtracker(digp,evNumber);
 561
 562     // Load clusters
 563     tracker->LoadInnerSectors();
 564     tracker->LoadOuterSectors();
 565
 566     // Load tracks
 567     TFile *tf=TFile::Open("AliTPCtracksSorted.root");
 568     if (!tf->IsOpen()) {
 569         cerr<<"Can't open AliTPCtracksSorted.root !\n";
 570         return ;
 571     } // end if
 572     TObjArray tracks(200000);
 573     char tname[100];
 574     sprintf(tname,"TreeT_TPC_%d",evNumber);
 575
 576     TTree *tracktree=(TTree*)tf->Get(tname);
 577     if (!tracktree) {cerr<<"Can't get a tree with TPC tracks !\n";}
 578     TBranch *tbranch=tracktree->GetBranch("tracks");
 579     Int_t nentr=(Int_t)tracktree->GetEntries();
 580     Int_t kk;
 581
 582     AliTPCtrack *ioTrackTPC=0;
 583     for (kk=0; kk<nentr; kk++) {
 584         ioTrackTPC=new AliTPCtrack;
 585         tbranch->SetAddress(&ioTrackTPC);
 586         tracktree->GetEvent(kk);
 587         tracker->CookLabel(ioTrackTPC,0.1);
 588         tracks.AddLast(ioTrackTPC);
 589     } // end for kk
 590     delete tracker;
 591     tf->Close();
 592
 593     Int_t nt = tracks.GetEntriesFast();
 594     cerr<<"Number of found tracks "<<nt<<endl;
 595
 596     TVector vec(5);
 597     TTree *tr=gAlice->TreeR();
 598     Int_t nent=(Int_t)tr->GetEntries();
 599     frecPoints = fITS->RecPoints();
 600
 601     Int_t numbpoints;
 602     Int_t totalpoints=0;
 603     Int_t *np = new Int_t[nent];
 604     fvettid = new Int_t* [nent];
 605     Int_t mod;
 606
 607     for (mod=0; mod<nent; mod++) {
 608         fvettid[mod]=0;
 609         fITS->ResetRecPoints();
 610         gAlice->TreeR()->GetEvent(mod);
 611         numbpoints = frecPoints->GetEntries();
 612         totalpoints+=numbpoints;
 613         np[mod] = numbpoints;
 614         //cout<<" mod = "<<mod<<"   numbpoints = "<<numbpoints<<"\n";getchar();
 615         fvettid[mod] = new Int_t[numbpoints];
 616         Int_t ii;
 617         for (ii=0;ii<numbpoints; ii++) *(fvettid[mod]+ii)=0;
 618     } // end for mod
 619
 620     AliTPCtrack *track=0;
 621
 622     if(minTr < 0) {minTr = 0; maxTr = nt-1;}
 623
 624     TVector vgeant(3);
 625
 626     TTree tracktree1("TreeT","Tree with ITS tracks");
 627     AliITSIOTrack *ioTrack=0;
 628     tracktree1.Branch("ITStracks","AliITSIOTrack",&ioTrack,32000,0);
 629
 630    TDatabasePDG * db = new TDatabasePDG;
 631
 632     Int_t j;
 633     for (j=minTr; j<=maxTr; j++) {
 634         track=(AliTPCtrack*)tracks.UncheckedAt(j);
 635         if (!track) continue;
 636
 637         ///   mass definition ////////////////////////
 638     Double_t mass=0.13956995;
 639          Int_t pcode=211;  // a pion by default
 640          if(realmass) {
 641     Int_t TPClabel=TMath::Abs( track->GetLabel() );
 642          TParticle *p = (TParticle*)gAlice->Particle(TPClabel);
 643           pcode=p->GetPdgCode();
 644          // Int_t mothercode=p->GetFirstMother();
 645          //if(mothercode>0 ) numofsecondaries++; else numofprimaries++;
 646          }
 647          //if(!pcode) pcode=211;
 648          if(TMath::Abs(pcode)<20443) mass=db->GetParticle(pcode)->Mass();
 649
 650
 651         ///////////////////////////////////////////////
 652   /*
 653         //////   propagation to the end of TPC //////////////
 654         Double_t xk=77.415;
 655         track->PropagateTo(xk, 28.94, 1.204e-3,mass);    //Ne
 656         xk -=0.01;
 657         track->PropagateTo(xk, 44.77, 1.71,mass);        //Tedlar
 658         xk -=0.04;
 659         track->PropagateTo(xk, 44.86, 1.45,mass);        //kevlar
 660         xk -=2.0;
 661         track->PropagateTo(xk, 41.28, 0.029,mass);       //Nomex
 662         xk-=16;
 663         track->PropagateTo(xk,36.2,1.98e-3,mass); //C02
 664         xk -=0.01;
 665         track->PropagateTo(xk, 24.01, 2.7,mass);         //Al
 666         xk -=0.01;
 667         track->PropagateTo(xk, 44.77, 1.71,mass);        //Tedlar
 668         xk -=0.04;
 669         track->PropagateTo(xk, 44.86, 1.45,mass);        //kevlar
 670         xk -=0.5;
 671         track->PropagateTo(xk, 41.28, 0.029,mass);       //Nomex
 672     ////////////////////////////////////////////////////////////////////
 673    */
 674          //   new propagation to the end of TPC
 675     Double_t xk=80.;
 676    // track->PropagateTo(xk,0.,0.); //Ne if it's still there   //attenzione funziona solo se modifica in TPC
 677         // Double_t xk=77.415;
 678          track->PropagateTo(xk, 28.94, 1.204e-3);
 679     xk-=0.005;
 680     track->PropagateTo(xk, 44.77,1.71); //Tedlar
 681     xk-=0.02;
 682     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 683     xk-=2.0;
 684     track->PropagateTo(xk, 41.28, 0.029);//Nomex
 685     xk-=0.02;
 686     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 687     xk-=0.005;
 688     track->PropagateTo(xk, 44.77, 1.71); //Tedlar
 689
 690     xk=61.;
 691    // track->PropagateTo(xk,0.,0.); //C02
 692          track->PropagateTo(xk,36.2,1.98e-3); //C02        //attenzione funziona solo se modifica in TPC
 693
 694     xk -=0.005;
 695     track->PropagateTo(xk, 24.01, 2.7);    //Al
 696     xk -=0.005;
 697     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 698     xk -=0.02;
 699     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 700     xk -=0.5;
 701     track->PropagateTo(xk, 41.28, 0.029);  //Nomex
 702     xk -=0.02;
 703     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 704     xk -=0.005;
 705     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 706     xk -=0.005;
 707     track->PropagateTo(xk, 24.01, 2.7);    //Al
 708         ////////////////////////////////////////////////////////////////////////////////////////////////////////
 709         AliITSTrackV1 trackITS(*track);
 710         trackITS.PutMass(mass);   //new to add mass to track
 711         if(fresult){ delete fresult; fresult=0;}
 712         fresult = new AliITSTrackV1(trackITS);
 713
 714         AliITSTrackV1 primaryTrack(trackITS);
 715         vgeant=(*fresult).GetVertex();
 716
 717         // Definition of dv and zv for vertex constraint
 718         Double_t sigmaDv=0.0050;  Double_t sigmaZv=0.010;
 719         //Double_t sigmaDv=0.0015;  Double_t sigmaZv=0.0015;
 720         Double_t uniform= gRandom->Uniform();
 721         Double_t signdv;
 722         if(uniform<=0.5) signdv=-1.;
 723         else
 724             signdv=1.;
 725
 726         Double_t vr=TMath::Sqrt(vgeant(0)*vgeant(0)+ vgeant(1)*vgeant(1));
 727         Double_t dv=gRandom->Gaus(signdv*vr,(Float_t)sigmaDv);
 728         Double_t zv=gRandom->Gaus(vgeant(2),(Float_t)sigmaZv);
 729         //cout<<" Dv e Zv = "<<dv<<" "<<zv<<"\n";
 730         trackITS.SetDv(dv);
 731         trackITS.SetZv(zv);
 732         trackITS.SetsigmaDv(sigmaDv);
 733         trackITS.SetsigmaZv(sigmaZv);
 734         (*fresult).SetDv(dv);
 735         (*fresult).SetZv(zv);
 736         (*fresult).SetsigmaDv(sigmaDv);
 737         (*fresult).SetsigmaZv(sigmaZv);
 738         primaryTrack.SetDv(dv);
 739         primaryTrack.SetZv(zv);
 740         primaryTrack.SetsigmaDv(sigmaDv);
 741         primaryTrack.SetsigmaZv(sigmaZv);
 742         primaryTrack.PrimaryTrack(frl);
 743         TVector  d2=primaryTrack.Getd2();
 744         TVector  tgl2=primaryTrack.Gettgl2();
 745         TVector  dtgl=primaryTrack.Getdtgl();
 746         trackITS.Setd2(d2); trackITS.Settgl2(tgl2);
 747         trackITS.Setdtgl(dtgl);
 748         (*fresult).Setd2(d2); (*fresult).Settgl2(tgl2);
 749         (*fresult).Setdtgl(dtgl);
 750         /*
 751           trackITS.SetVertex(vertex); trackITS.SetErrorVertex(ervertex);
 752           (*result).SetVertex(vertex);   (*result).SetErrorVertex(ervertex);
 753         */
 754         TList *list= new TList();
 755
 756         list->AddLast(&trackITS);
 757
 758         fPtref=TMath::Abs( (trackITS).GetPt() );
 759         if(fPtref>1.0) fChi2max=40.;
 760         if(fPtref<=1.0) fChi2max=20.;
 761         if(fPtref<0.4 ) fChi2max=100.;
 762         if(fPtref<0.2 ) fChi2max=40.;
 763         // if(fPtref<0.4 ) fChi2max=30.;
 764         // if(fPtref<0.2 ) fChi2max=20.;
 765         //if(fPtref<0.2 ) fChi2max=10.;
 766         //if(fPtref<0.1 ) fChi2max=5.;
 767         //cout << "\n Pt = " << fPtref <<"\n";  //stampa
 768         RecursiveTracking(list);
 769         list->Delete();
 770         delete list;
 771
 772         Int_t itot=-1;
 773         TVector vecTotLabRef(18);
 774         Int_t lay, k;
 775         for(lay=5; lay>=0; lay--) {
 776             TVector vecLabRef(3);
 777             vecLabRef=(*fresult).GetLabTrack(lay);
 778             Float_t clustZ=(*fresult).GetZclusterTrack( lay);
 779             for(k=0; k<3; k++){
 780                 Int_t lpp=(Int_t)vecLabRef(k);
 781                 if(lpp>=0) {
 782                     TParticle *p=(TParticle*) gAlice->Particle(lpp);
 783                     Int_t pcode=p->GetPdgCode();
 784                     if(pcode==11) vecLabRef(k)=p->GetFirstMother();
 785                 } // end if
 786                 itot++; vecTotLabRef(itot)=vecLabRef(k);
 787                 if(vecLabRef(k)==0. && clustZ == -1.) vecTotLabRef(itot) =-3.;
 788             } // end for k
 789         } // end for lay
 790         Long_t labref;
 791         Int_t freq;
 792         (*fresult).Search(vecTotLabRef, labref, freq);
 793
 794         //if(freq < 6) labref=-labref;        // cinque - sei
 795         if(freq < 5) labref=-labref;        // cinque - sei
 796         (*fresult).SetLabel(labref);
 797
 798         // cout<<" progressive track number = "<<j<<"\r";
 799         // cout<<j<<"\r";
 800         Int_t numOfCluster=(*fresult).GetNumClust();
 801         //cout<<" progressive track number = "<<j<<"\n";    // stampa
 802         Long_t labITS=(*fresult).GetLabel();
 803         //cout << " ITS track label = " << labITS << "\n";      // stampa
 804         Int_t lab=track->GetLabel();
 805         //cout << " TPC track label = " << lab <<"\n";      // stampa
 806         //propagation to vertex
 807
 808         Double_t rbeam=3.;
 809     if((*fresult).DoNotCross(rbeam)) continue;  //no intersection with beampipe
 810         (*fresult).Propagation(rbeam);
 811         Double_t c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44;
 812         (*fresult).GetCElements(c00,
 813                                 c10,c11,
 814                                 c20,c21,c22,
 815                                 c30,c31,c32,c33,
 816                                 c40,c41,c42,c43,c44);
 817
 818         Double_t pt=TMath::Abs((*fresult).GetPt());
 819         Double_t dr=(*fresult).GetD();
 820         Double_t z=(*fresult).GetZ();
 821         Double_t tgl=(*fresult).GetTgl();
 822         Double_t c=(*fresult).GetC();
 823         Double_t cy=c/2.;
 824         Double_t dz=z-(tgl/cy)*TMath::ASin((*fresult).Arga(rbeam));
 825         dz-=vgeant(2);
 826         // cout<<" dr e dz alla fine = "<<dr<<" "<<dz<<"\n"; getchar();
 827         Double_t phi=(*fresult).Getphi();
 828         Double_t phivertex = phi - TMath::ASin((*fresult).ArgA(rbeam));
 829         Double_t duepi=2.*TMath::Pi();
 830         if(phivertex>duepi) phivertex-=duepi;
 831         if(phivertex<0.) phivertex+=duepi;
 832         /////////////////////////////////////////////////////////////
 833         Int_t idmodule,idpoint;
 834         if(numOfCluster >=5)  {            // cinque - sei
 835             //if(numOfCluster ==6)  {            // cinque - sei
 836             AliITSIOTrack outTrack;
 837             ioTrack=&outTrack;
 838             ioTrack->SetStatePhi(phi);
 839             ioTrack->SetStateZ(z);
 840             ioTrack->SetStateD(dr);
 841             ioTrack->SetStateTgl(tgl);
 842             ioTrack->SetStateC(c);
 843             Double_t radius=(*fresult).Getrtrack();
 844             ioTrack->SetRadius(radius);
 845             Int_t charge;
 846             if(c>0.) charge=-1;  else charge=1;
 847             ioTrack->SetCharge(charge);
 848             ioTrack->SetCovMatrix(c00,
 849                                   c10,c11,
 850                                   c20,c21,c22,
 851                                   c30,c31,c32,c33,
 852                                   c40,c41,c42,c43,c44);
 853             Double_t px=pt*TMath::Cos(phivertex);
 854             Double_t py=pt*TMath::Sin(phivertex);
 855             Double_t pz=pt*tgl;
 856             Double_t xtrack=dr*TMath::Sin(phivertex);
 857             Double_t ytrack=dr*TMath::Cos(phivertex);
 858             Double_t ztrack=dz+vgeant(2);
 859             ioTrack->SetPx(px);
 860             ioTrack->SetPy(py);
 861             ioTrack->SetPz(pz);
 862             ioTrack->SetX(xtrack);
 863             ioTrack->SetY(ytrack);
 864             ioTrack->SetZ(ztrack);
 865             ioTrack->SetLabel(labITS);
 866             ioTrack->SetTPCLabel(lab);
 867                  ioTrack->SetDz(dz);
 868             Int_t il;
 869             for(il=0;il<6; il++){
 870                 ioTrack->SetIdPoint(il,(*fresult).GetIdPoint(il));
 871                 ioTrack->SetIdModule(il,(*fresult).GetIdModule(il));
 872             } // end for il
 873             tracktree1.Fill();
 874             for (il=0;il<6;il++) {
 875                 idpoint=(*fresult).GetIdPoint(il);
 876                 idmodule=(*fresult).GetIdModule(il);
 877                 if(idmodule>0.) *(fvettid[idmodule]+idpoint)=1;
 878
 879                 ioTrack->SetIdPoint(il,idpoint);
 880                 ioTrack->SetIdModule(il,idmodule);
 881             } // end for il
 882         } // end if on numOfCluster
 883         //gObjectTable->Print();    // stampa memoria
 884     }  //  end for (int j=minTr; j<=maxTr; j++)
 885     delete db;
 886     static Bool_t first=kTRUE;
 887     static TFile *tfile;
 888     if(first) {
 889         tfile=new TFile("itstracks.root","RECREATE");
 890         //cout<<"I have opened itstracks.root file "<<endl;
 891     } // end if
 892     first=kFALSE;
 893     tfile->cd();
 894     tfile->ls();
 895     char hname[30];
 896     sprintf(hname,"TreeT%d",evNumber);
 897     tracktree1.Write(hname);
 898
 899     TTree *fAli=gAlice->TreeK();
 900     TFile *fileAli=0;
 901     if (fAli) fileAli =fAli->GetCurrentFile();
 902     fileAli->cd();
 903     ////////////////////////////////////////////////////////////////////
 904
 905     printf("delete vectors\n");
 906     if(np) delete [] np;
 907     if(fvettid) delete [] fvettid;
 908     if(fresult) {delete fresult; fresult=0;}
 909 }
 910 //______________________________________________________________________
 911 void AliITSTrackerV1::RecursiveTracking(TList *trackITSlist) {
 912     //   This function perform the recursive tracking in ITS detectors
 913     // reference is a pointer to the final best track
 914     // Origin  A. Badala' and G.S. Pappalardo:
 915     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 916     // The authors thank Mariana Bondila to have help them to resolve some
 917     // problems.  July-2000
 918
 919     //Rlayer[0]=4.; Rlayer[1]=7.;  Rlayer[2]=14.9;
 920     // Rlayer[3]=23.8;  Rlayer[4]=39.1;  Rlayer[5]=43.6; //vecchio
 921
 922     //////////////////////
 923     Float_t sigmaphil[6], sigmazl[6];
 924     sigmaphil[0]=1.44e-6/(fAvrad[0]*fAvrad[0]);
 925     sigmaphil[1]=1.44e-6/(fAvrad[1]*fAvrad[1]);
 926     sigmaphil[2]=1.444e-5/(fAvrad[2]*fAvrad[2]);
 927     sigmaphil[3]=1.444e-5/(fAvrad[3]*fAvrad[3]);
 928     sigmaphil[4]=4e-6/(fAvrad[4]*fAvrad[4]);
 929     sigmaphil[5]=4e-6/(fAvrad[5]*fAvrad[5]);
 930     sigmazl[0]=1e-2;
 931     sigmazl[1]=1e-2;
 932     sigmazl[2]=7.84e-4;
 933     sigmazl[3]=7.84e-4;
 934     sigmazl[4]=0.6889;
 935     sigmazl[5]=0.6889;
 936     ///////////////////////////////////////////////////////////
 937     Int_t index;
 938     AliITSgeom *g1 = fITS->GetITSgeom();
 939     AliITSRecPoint *recp;
 940     for(index =0; index<trackITSlist->GetSize(); index++) {
 941         AliITSTrackV1 *trackITS = (AliITSTrackV1 *) trackITSlist->At(index);
 942         if((*trackITS).GetLayer()==7) fresult->SetChi2(10.223e140);
 943         // cout <<" Layer inizio = "<<(*trackITS).GetLayer()<<"\n";
 944         //  cout<<"fvtrack =" <<"\n";
 945         //  cout << (*trackITS)(0) << " "<<(*trackITS)(1)<<" "
 946         //       <<(*trackITS)(2)<<" "<<(*trackITS)(3)<<" "
 947         //       <<(*trackITS)(4)<<"\n";
 948         //  cout<< " rtrack = "<<(*trackITS).Getrtrack()<<"\n";
 949         //  cout<< " Pt = "<<(*trackITS).GetPt()<<"\n";
 950         //  getchar();
 951         Double_t chi2Now, chi2Ref;
 952         Float_t numClustRef = fresult->GetNumClust();
 953         if((*trackITS).GetLayer()==1 ) {
 954             chi2Now = trackITS->GetChi2();
 955             Float_t numClustNow = trackITS->GetNumClust();
 956             if(trackITS->GetNumClust())
 957                 chi2Now /= (Double_t)trackITS->GetNumClust();
 958             chi2Ref = fresult->GetChi2();
 959             if(fresult->GetNumClust())
 960                 chi2Ref /= (Double_t)fresult->GetNumClust();
 961             //cout<<" chi2Now and chi2Ref = "<<chi2Now<<" "<<chi2Ref<<"\n";
 962             if( numClustNow > numClustRef ) {*fresult = *trackITS;}
 963             if((numClustNow == numClustRef )&&
 964                (chi2Now < chi2Ref))  {
 965                 *fresult = *trackITS;
 966             } // end if
 967             continue;
 968         } // end if
 969
 970         if(trackITS->Getfnoclust()>=2)  continue;
 971         Float_t numClustNow = trackITS->GetNumClust();
 972         if(numClustNow) {
 973             chi2Now = trackITS->GetChi2();
 974
 975             if(numClustNow<numClustRef && chi2Now>fresult->GetChi2()) continue;
 976             //cout<<" chi2Now =  "<<chi2Now<<"\n";
 977
 978             chi2Now/=numClustNow;
 979             if(fPtref > 1.0 && chi2Now > 30.) continue;
 980             if((fPtref >= 0.6 && fPtref<=1.0) && chi2Now > 40.) continue;
 981             // if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 40.) continue;
 982             // if(fPtref <= 0.2 && chi2Now > 8.) continue;
 983             if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 30.) continue;
 984             if(fPtref <= 0.2 && chi2Now > 7.) continue;
 985             /////////////////////////////
 986         } // end if
 987
 988         Int_t layerInit = (*trackITS).GetLayer();
 989         Int_t layernew = layerInit - 2;// -1 for new layer, -1 for matrix index
 990         TList listoftrack;
 991         Int_t ladp, ladm, detp,detm,ladinters,detinters;
 992         Int_t layerfin=layerInit-1;
 993         // cout<<"Prima di intersection \n";
 994         Int_t  outinters=Intersection(*trackITS,layerfin,ladinters,detinters);
 995         // cout<<" outinters = "<<outinters<<"\n";
 996         //  cout<<" Layer ladder detector intersection ="
 997         //      <<layerfin<<" "<<ladinters<<" "<<detinters<<"\n";
 998         //  cout << " phiinters zinters = "<<(*trackITS)(0)
 999         //       << " "<<(*trackITS)(1)<<"\n"; getchar();
1000         if(outinters==-1) continue;
1001         Int_t flaghit=0;
1002         if(outinters==0){
1003             TVector toucLad(9), toucDet(9);
1004             Int_t lycur=layerfin;
1005             ladp=ladinters+1;
1006             ladm=ladinters-1;
1007             if(ladm <= 0) ladm=fNlad[layerfin-1];
1008             if(ladp > fNlad[layerfin-1]) ladp=1;
1009             detp=detinters+1;
1010             detm=detinters-1;
1011             Int_t idetot=1;
1012             /*
1013               toucLad(0)=ladinters; toucLad(1)=ladm; toucLad(2)=ladp;
1014               toucLad(3)=ladinters; toucLad(4)=ladm; toucLad(5)=ladp;
1015               toucLad(6)=ladinters; toucLad(7)=ladm; toucLad(8)=ladp;
1016               toucDet(0)=detinters; toucDet(1)=detinters; toucDet(2)=detinters;
1017               if(detm > 0 && detp <= fNdet[layerfin-1]) {
1018                    idetot=9;
1019                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1020                    toucDet(6)=detp; toucDet(7)=detp; toucDet(8)=detp;
1021               } // end if
1022               if(detm > 0 && detp > fNdet[layerfin-1]) {
1023                    idetot=6;
1024                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1025              } // end if
1026              if(detm <= 0 && detp <= fNdet[layerfin-1]) {
1027                   idetot=6;
1028                   toucDet(3)=detp; toucDet(4)=detp; toucDet(5)=detp;
1029              } // end if
1030             */
1031             Float_t epsphi=5.0, epsz=5.0;
1032             if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1033             // new definition of idetot e toucLad e toucDet to be
1034             // transformed in a method
1035             // these values could be modified
1036             Float_t pigre=TMath::Pi();
1037             Float_t rangephi=5., rangez=5.;
1038             if(layerfin==1 || layerfin ==2){
1039                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1040                                                 (*trackITS).GetSigmaphi());
1041                 rangez = 40.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1042                                               (*trackITS).GetSigmaZ());
1043             } // end if
1044             if(layerfin==3 || layerfin ==4){
1045                 //rangephi=30.*fepsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1046                 //                                 (*trackITS).GetSigmaphi());
1047                 //rangez = 40.*fepsz*TMath::Sqrt(sigmazl[layerfin-1]+
1048                 //                               (*trackITS).GetSigmaZ());
1049                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1050                                                 (*trackITS).GetSigmaphi());
1051                 rangez = 50.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1052                                               (*trackITS).GetSigmaZ());
1053             } // end if
1054             if(layerfin==5 || layerfin ==6){
1055                 rangephi=20.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1056                                                 (*trackITS).GetSigmaphi());
1057                 rangez =5.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1058                                             (*trackITS).GetSigmaZ());
1059             } // end if
1060             Float_t phinters, zinters;
1061             phinters=(*trackITS).Getphi();
1062             zinters=(*trackITS).GetZ();
1063             Float_t distz = 0.0;
1064             Float_t phicm, phicp, distphim, distphip;
1065             phicm=phinters;
1066                  if(phinters>fphimax[layerfin-1][ladm-1]) phicm=phinters-2*pigre;  //corretto il 20-11-2001
1067                  distphim=TMath::Abs(phicm-fphimax[layerfin-1][ladm-1]);  //corretto il 20-11-2001
1068             phicp=phinters;
1069                  //cout<<" fNlad[layerfin-1] e ladp = "<<fNlad[layerfin-1]<<" "<<ladp<<endl;
1070                  if(phinters>fphimin[layerfin-1][ladp-1]) phicp=phinters-2.*pigre;   //corretto il 20-11-2001
1071                  distphip=TMath::Abs(phicp-fphimin[layerfin-1][ladp-1]);      //corretto il 20-11-2001
1072             Int_t flagzmin=0;
1073             Int_t flagzmax=0;
1074             idetot=1;
1075             toucLad(0)=ladinters; toucDet(0)=detinters;
1076             if(detm>0) distz=TMath::Abs(zinters-fzmax[layerfin-1][detm-1]);
1077             if(detm>0 && rangez>=distz){
1078                 flagzmin=1;
1079                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detm;
1080                 if(rangephi>=distphim){
1081                     idetot++;
1082                     toucLad(idetot-1)=ladm;
1083                     toucDet(idetot-1)=detinters;
1084                     idetot++;
1085                     toucLad(idetot-1)=ladm;
1086                     toucDet(idetot-1)=detm;
1087                 } // end if
1088                 if(rangephi>=distphip){
1089                     idetot++;
1090                     toucLad(idetot-1)=ladp;
1091                     toucDet(idetot-1)=detinters;
1092                     idetot++;
1093                     toucLad(idetot-1)=ladp;
1094                     toucDet(idetot-1)=detm;
1095                 } // end if
1096             }  //end detm>0....
1097             if(detp<=fNdet[layerfin-1])
1098                 distz=TMath::Abs(zinters-fzmin[layerfin-1][detp-1]);
1099             if(detp<=fNdet[layerfin-1] && rangez>=distz){
1100                 flagzmax=1;
1101                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detp;
1102                 if(rangephi>=distphim){
1103                     idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detp;
1104                     if(flagzmin == 0) {
1105                         idetot++;
1106                         toucLad(idetot-1)=ladm;
1107                         toucDet(idetot-1)=detinters;
1108                     } // end if
1109                 } // end if
1110                 if(rangephi>=distphip){
1111                     idetot++;
1112                     toucLad(idetot-1)=ladp;
1113                     toucDet(idetot-1)=detp;
1114                     if(flagzmin == 0) {
1115                         idetot++;
1116                         toucLad(idetot-1)=ladp;
1117                         toucDet(idetot-1)=detinters;
1118                     } // end if
1119                 } // end if
1120             }  //end detm<fNdet[.......
1121
1122             if(flagzmin == 0 && flagzmax==0){
1123                 if(rangephi>=distphim){
1124                     idetot++;
1125                     toucLad(idetot-1)=ladm;
1126                     toucDet(idetot-1)=detinters;
1127                 } // end if
1128                 if(rangephi>=distphip){
1129                     idetot++;
1130                     toucLad(idetot-1)=ladp;
1131                     toucDet(idetot-1)=detinters;
1132                 } // end if
1133             } // end if
1134             ////////////////////////////////////////////////////////////
1135             Int_t iriv;
1136             for (iriv=0; iriv<idetot; iriv++) {  //for on detectors
1137                 ///////////////////////////////////////////////////////
1138                 /*** Rec points sorted by module *****/
1139                 /**************************************/
1140                 Int_t indexmod;
1141                 indexmod = g1->GetModuleIndex(lycur,(Int_t)toucLad(iriv),
1142                                               (Int_t)toucDet(iriv));
1143                 fITS->ResetRecPoints();
1144                 gAlice->TreeR()->GetEvent(indexmod);
1145                 Int_t npoints=frecPoints->GetEntries();
1146
1147                 Int_t indnew;
1148                 for(indnew=0; indnew<npoints; indnew++){
1149                     if (*(fvettid[indexmod]+indnew)==0)
1150                         recp =(AliITSRecPoint*)frecPoints->UncheckedAt(indnew);
1151                     else
1152                         continue;
1153                     TVector cluster(3),vecclust(9);
1154                     //vecclust(6)=vecclust(7)=vecclust(8)=-1.;
1155                     Double_t sigma[2];
1156   // now vecclust is with cylindrical cohordinates
1157                vecclust(0)=(Float_t)fRecCylR[indexmod][indnew];
1158                vecclust(1)=(Float_t)fRecCylPhi[indexmod][indnew];
1159                vecclust(2)=(Float_t)fRecCylZ[indexmod][indnew];
1160                     vecclust(3) = (Float_t)recp->fTracks[0];
1161                     vecclust(4) = (Float_t)indnew;
1162                     vecclust(5) = (Float_t)indexmod;
1163                     vecclust(6) = (Float_t)recp->fTracks[0];
1164                     vecclust(7) = (Float_t)recp->fTracks[1];
1165                     vecclust(8) = (Float_t)recp->fTracks[2];
1166                     sigma[0] = (Double_t)  recp->GetSigmaX2();
1167                     sigma[1] = (Double_t) recp->GetSigmaZ2();
1168
1169                          cluster(0)=fRecCylR[indexmod][indnew];
1170           cluster(1)=fRecCylPhi[indexmod][indnew];
1171                          cluster(2)=fRecCylZ[indexmod][indnew];
1172
1173                     // cout<<" layer = "<<play<<"\n";
1174                     // cout<<" cluster prima = "<<vecclust(0)<<" "
1175                     //     <<vecclust(1)<<" "
1176                     //     <<vecclust(2)<<"\n"; getchar();
1177
1178                     Float_t sigmatotphi, sigmatotz;
1179                     // Float_t epsphi=5.0, epsz=5.0;
1180                     //if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1181                     Double_t rTrack=(*trackITS).Getrtrack();
1182                     Double_t sigmaphi=sigma[0]/(rTrack*rTrack);
1183                     sigmatotphi=epsphi*TMath::Sqrt(sigmaphi +
1184                                                    (*trackITS).GetSigmaphi());
1185                     sigmatotz=epsz*TMath::Sqrt(sigma[1] +
1186                                                (*trackITS).GetSigmaZ());
1187                     //cout<<"cluster e sigmatotphi e track = "<<cluster(0)
1188                     //    <<" "<<cluster(1)<<" "<<sigmatotphi<<" "
1189                     //    <<vecclust(3)<<"\n";
1190                     //if(vecclust(3)==481) getchar();
1191                     if(cluster(1)<6. && (*trackITS).Getphi()>6.)
1192                         cluster(1)=cluster(1)+(2.*TMath::Pi());
1193                     if(cluster(1)>6. && (*trackITS).Getphi()<6.)
1194                         cluster(1)=cluster(1)-(2.*TMath::Pi());
1195                     if(TMath::Abs(cluster(1)-(*trackITS).Getphi())>sigmatotphi)
1196                         continue;
1197                     // cout<<" supero sigmaphi \n";
1198                     AliITSTrackV1 *newTrack = new AliITSTrackV1((*trackITS));
1199                     (*newTrack).SetLayer((*trackITS).GetLayer()-1);
1200                     if (TMath::Abs(rTrack-cluster(0))/rTrack>1e-6)
1201                         (*newTrack).Correct(Double_t(cluster(0)));
1202                     //cout<<" cluster(2) e(*newTrack).GetZ()="<<cluster(2)<<" "
1203                     //    << (*newTrack).GetZ()<<"\n";
1204                     if(TMath::Abs(cluster(2)-(*newTrack).GetZ()) > sigmatotz){
1205                         delete newTrack;
1206                         continue;
1207                     } // end if
1208                     Double_t sigmanew[2];
1209                     sigmanew[0]= sigmaphi;
1210                     sigmanew[1]=sigma[1];
1211                     Double_t m[2];
1212                     m[0]=cluster(1);
1213                     m[1]=cluster(2);
1214                     //  Double_t chi2pred=newTrack->GetPredChi2(m,sigmanew);
1215                     // cout<<" chi2pred = "<<chi2pred<<"\n";
1216                     // if(chi2pred>fChi2max) continue; //aggiunto il 30-7-2001
1217                     if(iriv == 0) flaghit=1;
1218                     (*newTrack).AddMS(frl);  // add the multiple scattering
1219                                              //matrix to the covariance matrix
1220                     (*newTrack).AddEL(frl,1.,0);
1221
1222                     if(fflagvert){
1223                         KalmanFilterVert(newTrack,cluster,sigmanew);
1224                         //KalmanFilterVert(newTrack,cluster,sigmanew,chi2pred);
1225                     }else{
1226                         KalmanFilter(newTrack,cluster,sigmanew);
1227                     } // end if
1228                     (*newTrack).PutCluster(layernew, vecclust);
1229                     newTrack->AddClustInTrack();
1230                     listoftrack.AddLast(newTrack);
1231                 }   // end for indnew
1232             }  // end of for on detectors (iriv)
1233         }//end if(outinters==0)
1234
1235         if(flaghit==0 || outinters==-2) {
1236             AliITSTrackV1 *newTrack = new AliITSTrackV1(*trackITS);
1237             (*newTrack).Setfnoclust();
1238             (*newTrack).SetLayer((*trackITS).GetLayer()-1);
1239             (*newTrack).AddMS(frl);  // add the multiple scattering matrix
1240                                      // to the covariance matrix
1241             (*newTrack).AddEL(frl,1.,0);
1242             listoftrack.AddLast(newTrack);
1243         } // end if
1244
1245         //gObjectTable->Print();   // stampa memoria
1246
1247         RecursiveTracking(&listoftrack);
1248         listoftrack.Delete();
1249     } // end of for on tracks (index)
1250
1251     //gObjectTable->Print();   // stampa memoria
1252 }
1253 //______________________________________________________________________
1254 Int_t AliITSTrackerV1::Intersection(AliITSTrackV1 &track,Int_t layer,
1255                                     Int_t &ladder,Int_t &detector) {
1256     // Origin  A. Badala' and G.S. Pappalardo
1257     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1258     // Found the intersection and the detector
1259
1260     Double_t rk=fAvrad[layer-1];
1261     if(track.DoNotCross(rk)){ /*cout<< " Do not cross \n";*/ return -1;}
1262     track.Propagation(rk);
1263     Double_t zinters=track.GetZ();
1264     Double_t phinters=track.Getphi();
1265     //cout<<"zinters = "<<zinters<<"  phinters = "<<phinters<<"\n";
1266
1267     TVector det(9);
1268     TVector listDet(2);
1269     TVector distZCenter(2);
1270
1271     Int_t iz=0;
1272     Int_t iD;
1273     for(iD = 1; iD<= fNdet[layer-1]; iD++) {
1274         if(zinters > fzmin[layer-1][iD-1] && zinters <= fzmax[layer-1][iD-1]) {
1275             if(iz>1) {
1276                 cout<< " Errore su iz in Intersection \n";
1277                 getchar();
1278             }else {
1279                 listDet(iz)= iD; distZCenter(iz)=TMath::Abs(zinters-det(2));
1280                 iz++;
1281             } // end if
1282         } // end if
1283     } // end for iD
1284
1285     if(iz==0) {/* cout<< " No detector along Z \n";*/ return -2;}
1286     detector=Int_t (listDet(0));
1287     if(iz>1 && (distZCenter(0)>distZCenter(1)))   detector=Int_t (listDet(1));
1288
1289     TVector listLad(2);
1290     TVector distPhiCenter(2);
1291     Int_t ip=0;
1292     Double_t pigre=TMath::Pi();
1293     Int_t iLd;
1294     for(iLd = 1; iLd<= fNlad[layer-1]; iLd++) {
1295         Double_t phimin=fphimin[layer-1][iLd-1];
1296         Double_t phimax=fphimax[layer-1][iLd-1];
1297         Double_t phidet=fphidet[layer-1][iLd-1];
1298         Double_t phiconfr=phinters;
1299         if(phimin>phimax) {
1300             //if(phimin <5.5) {cout<<" Error in Intersection for phi \n";
1301             // getchar();}
1302             phimin-=(2.*pigre);
1303             if(phinters>(1.5*pigre)) phiconfr=phinters-(2.*pigre);
1304             if(phidet>(1.5*pigre)) phidet-=(2.*pigre);
1305         } // end if
1306         if(phiconfr>phimin && phiconfr<= phimax) {
1307             if(ip>1) {
1308                 cout<< " Errore su ip in Intersection \n"; getchar();
1309             }else  {
1310                 listLad(ip)= iLd;
1311                 distPhiCenter(ip)=TMath::Abs(phiconfr-phidet); ip++;
1312             } // end if
1313         } // end if
1314     } // end for iLd
1315     if(ip==0) { cout<< " No detector along phi \n"; getchar();}
1316     ladder=Int_t (listLad(0));
1317     if(ip>1 && (distPhiCenter(0)>distPhiCenter(1)))  ladder=Int_t (listLad(1));
1318     return 0;
1319 }
1320 //______________________________________________________________________
1321 void AliITSTrackerV1::KalmanFilter(AliITSTrackV1 *newTrack,TVector &cluster,
1322                                    Double_t sigma[2]){
1323     //Origin  A. Badala' and G.S. Pappalardo:
1324     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1325     // Kalman filter without vertex constraint
1326     ////// Evaluation of the measurement vector ////////////////////////
1327     Double_t m[2];
1328     Double_t rk,phik,zk;
1329     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1330     m[0]=phik;    m[1]=zk;
1331     //////////////////////// Evaluation of the error matrix V  /////////
1332     Double_t v00=sigma[0];
1333     Double_t v11=sigma[1];
1334     ////////////////////////////////////////////////////////////////////
1335     Double_t cin00,cin10,cin20,cin30,cin40,cin11,cin21,cin31,cin41,cin22,
1336              cin32,cin42,cin33,cin43,cin44;
1337
1338     newTrack->GetCElements(cin00,
1339                            cin10,cin11,
1340                            cin20,cin21,cin22,
1341                            cin30,cin31,cin32,cin33,
1342                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1343     Double_t rold00=cin00+v00;
1344     Double_t rold10=cin10;
1345     Double_t rold11=cin11+v11;
1346     ////////////////////// R matrix inversion  /////////////////////////
1347     Double_t det=rold00*rold11-rold10*rold10;
1348     Double_t r00=rold11/det;
1349     Double_t r10=-rold10/det;
1350     Double_t r11=rold00/det;
1351     ////////////////////////////////////////////////////////////////////
1352     Double_t k00=cin00*r00+cin10*r10;
1353     Double_t k01=cin00*r10+cin10*r11;
1354     Double_t k10=cin10*r00+cin11*r10;
1355     Double_t k11=cin10*r10+cin11*r11;
1356     Double_t k20=cin20*r00+cin21*r10;
1357     Double_t k21=cin20*r10+cin21*r11;
1358     Double_t k30=cin30*r00+cin31*r10;
1359     Double_t k31=cin30*r10+cin31*r11;
1360     Double_t k40=cin40*r00+cin41*r10;
1361     Double_t k41=cin40*r10+cin41*r11;
1362     Double_t x0,x1,x2,x3,x4;
1363     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1364     Double_t savex0=x0, savex1=x1;
1365     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1);
1366     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1);
1367     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1);
1368     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1);
1369     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1);
1370     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1371     c00=cin00-k00*cin00-k01*cin10;
1372     c10=cin10-k00*cin10-k01*cin11;
1373     c20=cin20-k00*cin20-k01*cin21;
1374     c30=cin30-k00*cin30-k01*cin31;
1375     c40=cin40-k00*cin40-k01*cin41;
1376     c11=cin11-k10*cin10-k11*cin11;
1377     c21=cin21-k10*cin20-k11*cin21;
1378     c31=cin31-k10*cin30-k11*cin31;
1379     c41=cin41-k10*cin40-k11*cin41;
1380     c22=cin22-k20*cin20-k21*cin21;
1381     c32=cin32-k20*cin30-k21*cin31;
1382     c42=cin42-k20*cin40-k21*cin41;
1383     c33=cin33-k30*cin30-k31*cin31;
1384     c43=cin43-k30*cin40-k31*cin41;
1385     c44=cin44-k40*cin40-k41*cin41;
1386     newTrack->PutXElements(x0,x1,x2,x3,x4);  // put the new state vector
1387     newTrack->PutCElements(c00,
1388                            c10,c11,
1389                            c20,c21,c22,
1390                            c30,c31,c32,c33,
1391                            c40,c41,c42,c43,c44); // put in track the
1392                                                  // new cov matrix
1393     Double_t vmcold00=v00-c00;
1394     Double_t vmcold10=-c10;
1395     Double_t vmcold11=v11-c11;
1396     ////////////////////// Matrix vmc inversion  ///////////////////////
1397     det=vmcold00*vmcold11-vmcold10*vmcold10;
1398     Double_t vmc00=vmcold11/det;
1399     Double_t vmc10=-vmcold10/det;
1400     Double_t vmc11=vmcold00/det;
1401     ////////////////////////////////////////////////////////////////////
1402   Double_t chi2=(m[0]-x0)*( vmc00*(m[0]-x0) + 2.*vmc10*(m[1]-x1) ) +
1403                 (m[1]-x1)*vmc11*(m[1]-x1);
1404   newTrack->SetChi2(newTrack->GetChi2()+chi2);
1405 }
1406 //----------------------------------------------------------------------
1407 //void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1408 //                                       TVector &cluster,Double_t sigma[2]){
1409 void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1410                                        TVector &cluster,Double_t sigma[2]
1411                                        /*, Double_t chi2pred*/){
1412     //Origin  A. Badala' and G.S. Pappalardo:
1413     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1414     // Kalman filter with vertex constraint
1415     ///////////////////// Evaluation of the measurement vector m ////////
1416     Double_t m[4];
1417     Double_t rk,phik,zk;
1418     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1419     m[0]=phik;    m[1]=zk;
1420     Double_t cc=(*newTrack).GetC();
1421     Double_t zv=(*newTrack).GetZv();
1422     Double_t dv=(*newTrack).GetDv();
1423     Double_t cy=cc/2.;
1424     Double_t tgl= (zk-zv)*cy/TMath::ASin(cy*rk);
1425     m[2]=dv;    m[3]=tgl;
1426     /////////////////////// Evaluation of the error matrix V  //////////
1427     Int_t layer=newTrack->GetLayer();
1428     Double_t v00=sigma[0];
1429     Double_t v11=sigma[1];
1430     Double_t v31=sigma[1]/rk;
1431     Double_t sigmaDv=newTrack->GetsigmaDv();
1432     Double_t v22=sigmaDv*sigmaDv  + newTrack->Getd2(layer-1);
1433     Double_t v32=newTrack->Getdtgl(layer-1);
1434     Double_t sigmaZv=newTrack->GetsigmaZv();
1435     Double_t v33=(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+newTrack->Gettgl2(layer-1);
1436     //////////////////////////////////////////////////////////////////
1437     Double_t cin00,cin10,cin11,cin20,cin21,cin22,
1438              cin30,cin31,cin32,cin33,cin40,cin41,cin42,cin43,cin44;
1439     newTrack->GetCElements(cin00,
1440                            cin10,cin11,
1441                            cin20,cin21,cin22,
1442                            cin30,cin31,cin32,cin33,
1443                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1444     Double_t r[4][4];
1445     r[0][0]=cin00+v00;
1446     r[1][0]=cin10;
1447     r[2][0]=cin20;
1448     r[3][0]=cin30;
1449     r[1][1]=cin11+v11;
1450     r[2][1]=cin21;
1451     r[3][1]=cin31+sigma[1]/rk;
1452     r[2][2]=cin22+sigmaDv*sigmaDv+newTrack->Getd2(layer-1);
1453     r[3][2]=cin32+newTrack->Getdtgl(layer-1);
1454     r[3][3]=cin33+(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+
1455                                     newTrack->Gettgl2(layer-1);
1456     r[0][1]=r[1][0]; r[0][2]=r[2][0]; r[0][3]=r[3][0];
1457     r[1][2]=r[2][1]; r[1][3]=r[3][1]; r[2][3]=r[3][2];
1458     /////////////////////  Matrix R inversion //////////////////////////
1459     const Int_t kn=4;
1460     Double_t big, hold;
1461     Double_t d=1.;
1462     Int_t ll[kn],mm[kn];
1463     Int_t i,j,k;
1464
1465     for(k=0; k<kn; k++) {
1466         ll[k]=k;
1467         mm[k]=k;
1468         big=r[k][k];
1469         for(j=k; j<kn ; j++) {
1470             for (i=j; i<kn; i++) {
1471                 if(TMath::Abs(big) < TMath::Abs(r[i][j]) ) {
1472                     big=r[i][j];
1473                     ll[k]=i;
1474                     mm[k]=j;
1475                 } // end if
1476             } // end for i
1477         } // end for j
1478         //
1479         j= ll[k];
1480         if(j > k) {
1481             for(i=0; i<kn; i++) {
1482                 hold=-r[k][i];
1483                 r[k][i]=r[j][i];
1484                 r[j][i]=hold;
1485             } // end for i
1486         }// end if
1487         //
1488         i=mm[k];
1489         if(i > k ) {
1490             for(j=0; j<kn; j++) {
1491                 hold=-r[j][k];
1492                 r[j][k]=r[j][i];
1493                 r[j][i]=hold;
1494             } // end for j
1495         } // end if
1496         //
1497         if(!big) {
1498             d=0.;
1499             cout << "Singular matrix\n";
1500         } // end if
1501         for(i=0; i<kn; i++) {
1502             if(i == k) { continue; }
1503             r[i][k]=r[i][k]/(-big);
1504         } // end for i
1505         //
1506         for(i=0; i<kn; i++) {
1507             hold=r[i][k];
1508             for(j=0; j<kn; j++) {
1509                 if(i == k || j == k) continue;
1510                 r[i][j]=hold*r[k][j]+r[i][j];
1511             } // end for j
1512         } // end of ri
1513         //
1514         for(j=0; j<kn; j++) {
1515             if(j == k) continue;
1516             r[k][j]=r[k][j]/big;
1517         } // end for j
1518         //
1519         d=d*big;
1520         //
1521         r[k][k]=1./big;
1522     } // end for k
1523     //
1524     for(k=kn-1; k>=0; k--) {
1525         i=ll[k];
1526         if(i > k) {
1527             for (j=0; j<kn; j++) {
1528                 hold=r[j][k];
1529                 r[j][k]=-r[j][i];
1530                 r[j][i]=hold;
1531             } // end for j
1532         } // end if i
1533         j=mm[k];
1534         if(j > k) {
1535             for (i=0; i<kn; i++) {
1536                 hold=r[k][i];
1537                 r[k][i]=-r[j][i];
1538                 r[j][i]=hold;
1539             } // end for i
1540         } // end if
1541     } // end for k
1542     ////////////////////////////////////////////////////////////////////
1543     Double_t k00=cin00*r[0][0]+cin10*r[1][0]+cin20*r[2][0]+cin30*r[3][0];
1544     Double_t k01=cin00*r[1][0]+cin10*r[1][1]+cin20*r[2][1]+cin30*r[3][1];
1545     Double_t k02=cin00*r[2][0]+cin10*r[2][1]+cin20*r[2][2]+cin30*r[3][2];
1546     Double_t k03=cin00*r[3][0]+cin10*r[3][1]+cin20*r[3][2]+cin30*r[3][3];
1547     Double_t k10=cin10*r[0][0]+cin11*r[1][0]+cin21*r[2][0]+cin31*r[3][0];
1548     Double_t k11=cin10*r[1][0]+cin11*r[1][1]+cin21*r[2][1]+cin31*r[3][1];
1549     Double_t k12=cin10*r[2][0]+cin11*r[2][1]+cin21*r[2][2]+cin31*r[3][2];
1550     Double_t k13=cin10*r[3][0]+cin11*r[3][1]+cin21*r[3][2]+cin31*r[3][3];
1551     Double_t k20=cin20*r[0][0]+cin21*r[1][0]+cin22*r[2][0]+cin32*r[3][0];
1552     Double_t k21=cin20*r[1][0]+cin21*r[1][1]+cin22*r[2][1]+cin32*r[3][1];
1553     Double_t k22=cin20*r[2][0]+cin21*r[2][1]+cin22*r[2][2]+cin32*r[3][2];
1554     Double_t k23=cin20*r[3][0]+cin21*r[3][1]+cin22*r[3][2]+cin32*r[3][3];
1555     Double_t k30=cin30*r[0][0]+cin31*r[1][0]+cin32*r[2][0]+cin33*r[3][0];
1556     Double_t k31=cin30*r[1][0]+cin31*r[1][1]+cin32*r[2][1]+cin33*r[3][1];
1557     Double_t k32=cin30*r[2][0]+cin31*r[2][1]+cin32*r[2][2]+cin33*r[3][2];
1558     Double_t k33=cin30*r[3][0]+cin31*r[3][1]+cin32*r[3][2]+cin33*r[3][3];
1559     Double_t k40=cin40*r[0][0]+cin41*r[1][0]+cin42*r[2][0]+cin43*r[3][0];
1560     Double_t k41=cin40*r[1][0]+cin41*r[1][1]+cin42*r[2][1]+cin43*r[3][1];
1561     Double_t k42=cin40*r[2][0]+cin41*r[2][1]+cin42*r[2][2]+cin43*r[3][2];
1562     Double_t k43=cin40*r[3][0]+cin41*r[3][1]+cin42*r[3][2]+cin43*r[3][3];
1563
1564     Double_t x0,x1,x2,x3,x4;
1565     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1566     Double_t savex0=x0, savex1=x1, savex2=x2, savex3=x3;
1567     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1)+k02*(m[2]-savex2)+
1568         k03*(m[3]-savex3);
1569     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1)+k12*(m[2]-savex2)+
1570         k13*(m[3]-savex3);
1571     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1)+k22*(m[2]-savex2)+
1572         k23*(m[3]-savex3);
1573     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1)+k32*(m[2]-savex2)+
1574         k33*(m[3]-savex3);
1575     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1)+k42*(m[2]-savex2)+
1576         k43*(m[3]-savex3);
1577     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1578     c00=cin00-k00*cin00-k01*cin10-k02*cin20-k03*cin30;
1579     c10=cin10-k00*cin10-k01*cin11-k02*cin21-k03*cin31;
1580     c20=cin20-k00*cin20-k01*cin21-k02*cin22-k03*cin32;
1581     c30=cin30-k00*cin30-k01*cin31-k02*cin32-k03*cin33;
1582     c40=cin40-k00*cin40-k01*cin41-k02*cin42-k03*cin43;
1583     c11=cin11-k10*cin10-k11*cin11-k12*cin21-k13*cin31;
1584     c21=cin21-k10*cin20-k11*cin21-k12*cin22-k13*cin32;
1585     c31=cin31-k10*cin30-k11*cin31-k12*cin32-k13*cin33;
1586     c41=cin41-k10*cin40-k11*cin41-k12*cin42-k13*cin43;
1587     c22=cin22-k20*cin20-k21*cin21-k22*cin22-k23*cin32;
1588     c32=cin32-k20*cin30-k21*cin31-k22*cin32-k23*cin33;
1589     c42=cin42-k20*cin40-k21*cin41-k22*cin42-k23*cin43;
1590     c33=cin33-k30*cin30-k31*cin31-k32*cin32-k33*cin33;
1591     c43=cin43-k30*cin40-k31*cin41-k32*cin42-k33*cin43;
1592     c44=cin44-k40*cin40-k41*cin41-k42*cin42-k43*cin43;
1593
1594     newTrack->PutXElements(x0,x1,x2,x3,x4); // put the new state vector
1595     newTrack->PutCElements(c00,
1596                            c10,c11,
1597                            c20,c21,c22,
1598                            c30,c31,c32,c33,
1599                            c40,c41,c42,c43,c44); // put in track the
1600                                                  // new cov matrix
1601     Double_t vmc[4][4];
1602     vmc[0][0]=v00-c00; vmc[1][0]=-c10; vmc[2][0]=-c20; vmc[3][0]=-c30;
1603     vmc[1][1]=v11-c11; vmc[2][1]=-c21; vmc[3][1]=v31-c31;
1604     vmc[2][2]=v22-c22; vmc[3][2]=v32-c32;
1605     vmc[3][3]=v33-c33;
1606     vmc[0][1]=vmc[1][0]; vmc[0][2]=vmc[2][0]; vmc[0][3]=vmc[3][0];
1607     vmc[1][2]=vmc[2][1]; vmc[1][3]=vmc[3][1];
1608     vmc[2][3]=vmc[3][2];
1609     /////////////////////// vmc matrix inversion ///////////////////////
1610     d=1.;
1611     for(k=0; k<kn; k++) {
1612         ll[k]=k;
1613         mm[k]=k;
1614         big=vmc[k][k];
1615         for(j=k; j<kn ; j++) {
1616             for (i=j; i<kn; i++) {
1617                 if(TMath::Abs(big) < TMath::Abs(vmc[i][j]) ) {
1618                     big=vmc[i][j];
1619                     ll[k]=i;
1620                     mm[k]=j;
1621                 } // end if
1622             } // end for i
1623         } // end for j
1624         //
1625         j= ll[k];
1626         if(j > k) {
1627             for(i=0; i<kn; i++) {
1628                 hold=-vmc[k][i];
1629                 vmc[k][i]=vmc[j][i];
1630                 vmc[j][i]=hold;
1631             } // end for i
1632         } // end if
1633         //
1634         i=mm[k];
1635         if(i > k ) {
1636             for(j=0; j<kn; j++) {
1637                 hold=-vmc[j][k];
1638                 vmc[j][k]=vmc[j][i];
1639                 vmc[j][i]=hold;
1640             } // end for j
1641         } // end if
1642         //
1643         if(!big) {
1644             d=0.;
1645             cout << "Singular matrix\n";
1646         } // end if
1647         for(i=0; i<kn; i++) {
1648             if(i == k) continue;
1649             vmc[i][k]=vmc[i][k]/(-big);
1650         }    // end for i
1651         //
1652         for(i=0; i<kn; i++) {
1653             hold=vmc[i][k];
1654             for(j=0; j<kn; j++) {
1655                 if(i == k || j == k) continue;
1656                 vmc[i][j]=hold*vmc[k][j]+vmc[i][j];
1657             } // end for j
1658         } // end for i
1659         //
1660         for(j=0; j<kn; j++) {
1661             if(j == k) continue;
1662             vmc[k][j]=vmc[k][j]/big;
1663         } // end for j
1664         //
1665         d=d*big;
1666         //
1667         vmc[k][k]=1./big;
1668     }  // end for k
1669     //
1670     for(k=kn-1; k>=0; k--) {
1671         i=ll[k];
1672         if(i > k) {
1673             for (j=0; j<kn; j++) {
1674                 hold=vmc[j][k];
1675                 vmc[j][k]=-vmc[j][i];
1676                 vmc[j][i]=hold;
1677             } // end for j
1678         } // end if i>k
1679         j=mm[k];
1680         if(j > k) {
1681             for (i=0; i<kn; i++) {
1682                 hold=vmc[k][i];
1683                 vmc[k][i]=-vmc[j][i];
1684                 vmc[j][i]=hold;
1685             } // end for i
1686         } // end if j>k
1687     } // end for k
1688     ////////////////////////////////////////////////////////////////////
1689     Double_t chi2=(m[0]-x0)*( vmc[0][0]*(m[0]-x0) + 2.*vmc[1][0]*(m[1]-x1) +
1690                               2.*vmc[2][0]*(m[2]-x2)+ 2.*vmc[3][0]*(m[3]-x3) )+
1691         (m[1]-x1)* ( vmc[1][1]*(m[1]-x1) + 2.*vmc[2][1]*(m[2]-x2)+
1692                      2.*vmc[3][1]*(m[3]-x3) ) +
1693         (m[2]-x2)* ( vmc[2][2]*(m[2]-x2)+ 2.*vmc[3][2]*(m[3]-x3) ) +
1694         (m[3]-x3)*vmc[3][3]*(m[3]-x3);
1695     //cout<<" chi2 kalman = "<<chi2<<"\n";  getchar();
1696     newTrack->SetChi2(newTrack->GetChi2()+chi2);
1697     //   newTrack->SetChi2(newTrack->GetChi2()+chi2pred);
1698 }