ITS/AliITSTrackerV1.cxx

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