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