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