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 1.24  2002/10/23 14:28:38  barbera
  19 Fixes added to get into account the new magnetic field conversion factor automatically
  20
  21 Revision 1.23  2002/10/22 18:29:34  barbera
  22 Tracking V1 ported to the HEAD
  23
  24 Revision 1.22  2002/10/22 14:45:36  alibrary
  25 Introducing Riostream.h
  26
  27 Revision 1.21  2002/02/05 09:12:26  hristov
  28 Small mods for gcc 3.02
  29
  30 Revision 1.20  2001/11/21 14:47:45  barbera
  31 Some unuseful print-out commented out
  32
  33 Revision 1.19  2001/11/21 10:49:07  barbera
  34 Bug correction suggested by Rene done
  35
  36 Revision 1.18  2001/11/20 15:46:17  barbera
  37 Point coordinated are calculated in cylindrical reference frame once and for all at the beginning of tracking V1
  38
  39 Revision 1.10.2.1  2001/10/24 07:26:04  hristov
  40 All the changes from the head are merged with the release
  41
  42 Revision 1.14  2001/10/24 07:19:57  hristov
  43 Some pointer correctly initialised in one of the constructors
  44
  45 Revision 1.13  2001/10/21 19:17:12  hristov
  46 Several pointers were set to zero in the default constructors to avoid memory management problems
  47
  48 Revision 1.12  2001/10/19 21:32:35  nilsen
  49 Minor changes to remove compliation warning on gcc 2.92.2 compiler, and
  50 cleanded up a little bit of code.
  51
  52 */
  53 // The purpose of this class is to permorm the ITS tracking. The
  54 // constructor has the task to inizialize some private members. The method
  55 // DoTracking is written to be called by a macro. It gets the event number,
  56 // the minimum and maximum order number of TPC tracks that are to be tracked
  57 // trough the ITS, and the file where the recpoints are registered. The
  58 // method Recursivetracking is a recursive function that performs the
  59 // tracking trough the ITS The method Intersection found the layer, ladder
  60 // and detector whre the intersection take place and caluclate the
  61 // cohordinates of this intersection. It returns an integer that is 0 if the
  62 // intersection has been found successfully. The two mwthods Kalmanfilter
  63 // and kalmanfiltervert operate the kalmanfilter without and with the vertex
  64 // imposition respectively. The authors thank Mariana Bondila to have help
  65 // them to resolve some problems.  July-2000
  66
  67 #include <Riostream.h>
  68 #include <Riostream.h>
  69 #include <TMath.h>
  70 #include <TBranch.h>
  71 #include <TVector.h>
  72 #include <TFile.h>
  73 #include <TTree.h>
  74 #include <TStopwatch.h>
  75
  76 #include "TParticle.h"
  77 #include "AliRun.h"
  78 #include "AliITS.h"
  79 #include "AliITSsegmentationSSD.h"
  80 #include "AliITSgeomSPD.h"
  81 #include "AliITSgeomSDD.h"
  82 #include "AliITSgeomSSD.h"
  83 #include "AliITSgeom.h"
  84 #include "AliITSRecPoint.h"
  85 #include "stdlib.h"
  86 #include "AliKalmanTrack.h"
  87 #include "AliMagF.h"
  88 #include "AliITSTrackV1.h"
  89 #include "AliITSIOTrack.h"
  90 #include "AliITSRad.h"
  91 #include "../TPC/AliTPCtracker.h"
  92 #include "AliITSTrackerV1.h"
  93 #include "AliITSVertex.h"
  94 #include "AliITSPid.h"
  95
  96 ClassImp(AliITSTrackerV1)
  97  //______________________________________________________________________
  98 AliITSTrackerV1::AliITSTrackerV1() {
  99   //Default constructor
 100   fITS = 0;
 101   fresult = 0;
 102   fPtref=0.;
 103   fChi2max=0.;
 104   //fepsphi=0.;
 105   //fepsz=0.;
 106   frecPoints = 0;
 107   fvettid = 0;
 108   fflagvert=0;
 109   frl = 0;
 110   Int_t ia;
 111   for(ia=0; ia<6; ia++) {
 112   fNlad[ia]=0;
 113   fNdet[ia]=0;
 114   fAvrad[ia]=0.;
 115   fDetx[ia]=0.;
 116   fDetz[ia]=0.;
 117   } // end for ia
 118   fzmin = 0;
 119   fzmax = 0;
 120   fphimin = 0;
 121   fphimax = 0;
 122   fphidet = 0;
 123   fNRecPoints=0;
 124   fRecCylR=0;
 125   fRecCylPhi=0;
 126   fRecCylZ=0;
 127   fFieldFactor=0;
 128 }
 129 //______________________________________________________________________
 130 AliITSTrackerV1::AliITSTrackerV1(AliITS* IITTSS, Int_t evnumber, Bool_t flag) {
 131     //Origin   A. Badala' and G.S. Pappalardo:
 132     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 133     // Class constructor. It does some initializations.
 134
 135   //PH Initialisation taken from the default constructor
 136     fITS      = IITTSS;
 137     fresult = 0;
 138     fPtref    = 0.;
 139     fChi2max  =0.;
 140     frecPoints = 0;
 141     fvettid = 0;
 142     fflagvert = flag;
 143     frl = 0;
 144     fzmin = 0;
 145     fzmax = 0;
 146     fphimin = 0;
 147     fphimax = 0;
 148     fphidet = 0;
 149
 150     Int_t imax = 200,jmax = 450;
 151     frl       = new AliITSRad(imax,jmax);
 152
 153     //////////  gets information on geometry /////////////////////////////
 154          AliITSgeom *g1 = fITS->GetITSgeom();
 155     Int_t ll=1, dd=1;
 156     TVector det(9);
 157
 158     Int_t ia;
 159     for(ia=0; ia<6; ia++) {
 160         fNlad[ia]=g1->GetNladders(ia+1);
 161         fNdet[ia]=g1->GetNdetectors(ia+1);
 162         //cout<<fNlad[i]<<" "<<fNdet[i]<<"\n";
 163     } // end for ia
 164
 165     //cout<<" mean radius = ";
 166     Int_t ib;
 167     for(ib=0; ib<6; ib++) {
 168         g1->GetCenterThetaPhi(ib+1,ll,dd,det);
 169         Double_t r1=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 170         g1->GetCenterThetaPhi(ib+1,ll,dd+1,det);
 171         Double_t r2=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 172         fAvrad[ib]=(r1+r2)/2.;
 173         //cout<<fAvrad[ib]<<" ";
 174     } // end for ib
 175     //cout<<"\n"; getchar();
 176
 177     fDetx[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDx();
 178     fDetz[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDz();
 179
 180     fDetx[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDx();
 181     fDetz[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDz();
 182
 183     fDetx[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDx();
 184     fDetz[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDz();
 185
 186     fDetx[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDx();
 187     fDetz[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDz();
 188
 189     fDetx[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDx();
 190     fDetz[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDz();
 191
 192     fDetx[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDx();
 193     fDetz[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDz();
 194     //cout<<"    Detx     Detz\n";
 195     //for(Int_t la=0; la<6; la++) cout<<"    "<<fDetx[la]<<"     "<<
 196     //                                 fDetz[la]<<endl;
 197     //getchar();
 198
 199     // allocate memory and define matrices fzmin, fzmax, fphimin and fphimax //
 200     Double_t epsz=1.2;
 201     Double_t epszdrift=0.05;
 202
 203     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 204     Int_t im1, im2, im2max;
 205     for(im1=0; im1<6; im1++) {
 206         im2max=fNdet[im1];
 207         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 208     } // end for im1
 209
 210     for(im1=0; im1<6; im1++) {
 211         im2max=fNdet[im1];
 212         for(im2=0; im2<im2max; im2++) {
 213             g1->GetCenterThetaPhi(im1+1,1,im2+1,det);
 214             if(im2!=0) fzmin[im1][im2]=det(2)-fDetz[im1];
 215             else
 216                 fzmin[im1][im2]=det(2)-(fDetz[im1])*epsz;
 217             if(im2!=(im2max-1)) fzmax[im1][im2]=det(2)+fDetz[im1];
 218             else
 219                 fzmax[im1][im2]=det(2)+fDetz[im1]*epsz;
 220             if(im1==2 || im1==3) {
 221                 fzmin[im1][im2]-=epszdrift;
 222                 fzmax[im1][im2]+=epszdrift;
 223             } // end if im1==2 || im1==3
 224         } // end for im2
 225     } // end for im1
 226
 227     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 228     for(im1=0;im1<6;im1++) {
 229         im2max=fNlad[im1];
 230         fphimin[im1] = new Double_t[im2max];
 231         fphimax[im1] = new Double_t[im2max];
 232     } // end for im1
 233
 234     fphidet = new Double_t*[6];
 235     for(im1=0; im1<6; im1++) {
 236         im2max=fNlad[im1];
 237         fphidet[im1] = new Double_t[im2max];
 238     } // end for im1
 239
 240         Double_t global[3],local[3];
 241     Double_t pigre=TMath::Pi();
 242     Double_t xmin,ymin,xmax,ymax;
 243
 244     for(im1=0; im1<6; im1++) {
 245         im2max=fNlad[im1];
 246         for(im2=0; im2<im2max; im2++) {
 247             Int_t idet=2;
 248             g1->GetCenterThetaPhi(im1+1,im2+1,idet,det);
 249             fphidet[im1][im2] = TMath::ATan2(Double_t(det(1)),
 250                                              Double_t(det(0)));
 251             if(fphidet[im1][im2]<0.) fphidet[im1][im2]+=2.*pigre;
 252             local[1]=local[2]=0.;
 253             local[0]= -(fDetx[im1]);
 254             if(im1==0) local[0]= (fDetx[im1]); //to take into account
 255                                                // different reference system
 256             g1->LtoG(im1+1,im2+1,idet,local,global);
 257             xmax=global[0]; ymax=global[1];
 258             local[0]= (fDetx[im1]);
 259             if(im1==0) local[0]= -(fDetx[im1]);//take into account different
 260                                                // reference system
 261             g1->LtoG(im1+1,im2+1,idet,local,global);
 262             xmin=global[0]; ymin=global[1];
 263             fphimin[im1][im2]= TMath::ATan2(ymin,xmin);
 264             if(fphimin[im1][im2]<0.) fphimin[im1][im2]+=2.*pigre;
 265             fphimax[im1][im2]= TMath::ATan2(ymax,xmax);
 266             if(fphimax[im1][im2]<0.) fphimax[im1][im2]+=2.*pigre;
 267         } // end for im2
 268     } // end for im1
 269 //////////////////////////////////////////////////////////////////////////////////////////////////////////
 270 /////////////// allocate memory and define vector fNRecPoints and matrices fRecCylR, fRecCylPhi, fRecCylZ /////////////
 271         gAlice->GetEvent(evnumber);
 272   Int_t NumOfModules = g1->GetIndexMax();
 273   fRecCylR = new Double_t *[NumOfModules];
 274   fRecCylPhi = new Double_t *[NumOfModules];
 275   fRecCylZ = new Double_t *[NumOfModules];
 276   AliITSRecPoint *recp;
 277   fNRecPoints = new Int_t[NumOfModules];
 278
 279                  for(Int_t module=0; module<NumOfModules; module++) {
 280                   fITS->ResetRecPoints();
 281         gAlice->TreeR()->GetEvent(module);
 282                   frecPoints=fITS->RecPoints();
 283                   Int_t nRecPoints=fNRecPoints[module]=frecPoints->GetEntries();
 284                   fRecCylR[module] = new Double_t[nRecPoints];
 285                   fRecCylPhi[module] = new Double_t[nRecPoints];
 286                   fRecCylZ[module] = new  Double_t[nRecPoints];
 287                   Int_t ind;
 288                   for(ind=0; ind<fNRecPoints[module]; ind++) {
 289                     recp=(AliITSRecPoint*)frecPoints->UncheckedAt(ind);
 290                         // Float_t global[3], local[3];
 291                          Double_t global[3], local[3];
 292                local[0]=recp->GetX();
 293                local[1]=0.;
 294                local[2]= recp->GetZ();
 295                          g1->LtoG(module,local,global);
 296
 297                          Double_t r = TMath::Sqrt(global[0]*global[0]+global[1]*global[1]);                     // r hit
 298                          Double_t phi = TMath::ATan2(global[1],global[0]); if(phi<0.) phi+=2.*TMath::Pi();      // phi hit
 299                  Double_t z = global[2];                                                                // z hit
 300
 301                          fRecCylR[module][ind]=r;
 302                          fRecCylPhi[module][ind]=phi;
 303                          fRecCylZ[module][ind]=z;
 304                   }
 305                 }
 306          //}
 307   //}
 308 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 309
 310
 311     ////////// gets magnetic field factor //////////////////////////////
 312
 313     AliMagF * fieldPointer = gAlice->Field();
 314    // fFieldFactor = (Double_t)fieldPointer->Factor();
 315     fFieldFactor =(Double_t)fieldPointer-> SolenoidField()/10/.2;
 316    // cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
 317 }
 318 //______________________________________________________________________
 319 AliITSTrackerV1::AliITSTrackerV1(const AliITSTrackerV1 &cobj) {
 320     // Origin  A. Badala' and G.S. Pappalardo:
 321     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 322     // copy constructor
 323
 324          *fITS = *cobj.fITS;
 325     *fresult = *cobj.fresult;
 326     fPtref = cobj.fPtref;
 327     fChi2max = cobj.fChi2max;
 328     **fvettid = **cobj.fvettid;
 329     fflagvert = cobj.fflagvert;
 330     Int_t imax=200,jmax=450;
 331     frl = new AliITSRad(imax,jmax);
 332     *frl = *cobj.frl;
 333     fFieldFactor = cobj.fFieldFactor;
 334     Int_t i,im1,im2,im2max;
 335     for(i=0; i<6; i++) {
 336         fNlad[i] = cobj.fNlad[i];
 337         fNdet[i] = cobj.fNdet[i];
 338         fAvrad[i] = cobj.fAvrad[i];
 339         fDetx[i] = cobj.fDetx[i];
 340         fDetz[i] = cobj.fDetz[i];
 341     } // end or i
 342     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 343     for(im1=0; im1<6; im1++) {
 344         im2max=fNdet[im1];
 345         fzmin[im1] = new Double_t[im2max];
 346         fzmax[im1] = new Double_t[im2max];
 347     } // end for im1
 348     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 349     for(im1=0;im1<6;im1++) {
 350         im2max=fNlad[im1];
 351         fphimin[im1] = new Double_t[im2max];
 352         fphimax[im1] = new Double_t[im2max];
 353     } // end for im1
 354
 355     fphidet = new Double_t*[6];
 356     for(im1=0; im1<6; im1++) {
 357         im2max=fNlad[im1];
 358         fphidet[im1] = new Double_t[im2max];
 359     } // end for im1
 360     for(im1=0; im1<6; im1++) {
 361         im2max=fNdet[im1];
 362         for(im2=0; im2<im2max; im2++) {
 363             fzmin[im1][im2]=cobj.fzmin[im1][im2];
 364             fzmax[im1][im2]=cobj.fzmax[im1][im2];
 365         } // end for im2
 366     } // end for im1
 367     for(im1=0; im1<6; im1++) {
 368         im2max=fNlad[im1];
 369         for(im2=0; im2<im2max; im2++) {
 370             fphimin[im1][im2]=cobj.fphimin[im1][im2];
 371             fphimax[im1][im2]=cobj.fphimax[im1][im2];
 372             fphidet[im1][im2]=cobj.fphidet[im1][im2];
 373         } // end for im2
 374     } // end for im2
 375
 376
 377         AliITSgeom *g1 = fITS->GetITSgeom();
 378    Int_t NumOfModules = g1->GetIndexMax();
 379         /*
 380   fRecCylR = new Float_t *[NumOfModules];
 381   fRecCylPhi = new Float_t *[NumOfModules];
 382   fRecCylZ = new Float_t *[NumOfModules];
 383   */
 384   fRecCylR = new Double_t *[NumOfModules];
 385   fRecCylPhi = new Double_t *[NumOfModules];
 386   fRecCylZ = new Double_t *[NumOfModules];
 387   fNRecPoints = new Int_t[NumOfModules];
 388                 for(Int_t module=0; module<NumOfModules; module++) {
 389                   Int_t nRecPoints=fNRecPoints[module]=cobj.fNRecPoints[module];
 390                   /*
 391                   fRecCylR[module] = new Float_t[nRecPoints];
 392                   fRecCylPhi[module] = new Float_t[nRecPoints];
 393                   fRecCylZ[module] = new Float_t[nRecPoints];
 394                   */
 395                   fRecCylR[module] = new Double_t[nRecPoints];
 396                   fRecCylPhi[module] = new Double_t[nRecPoints];
 397                   fRecCylZ[module] = new Double_t[nRecPoints];
 398                   Int_t ind;
 399                   for(ind=0; ind<nRecPoints; ind++) {
 400                          fRecCylR[module][ind]=cobj.fRecCylR[module][ind];
 401                          fRecCylPhi[module][ind]=cobj.fRecCylPhi[module][ind];
 402                          fRecCylZ[module][ind]=cobj.fRecCylZ[module][ind];
 403                   }
 404                 }
 405
 406 }
 407 void AliITSTrackerV1::DelMatrix(Int_t NumOfModules) {
 408   for(Int_t mod=0; mod<NumOfModules; mod++) {
 409     delete fRecCylR[mod];
 410          delete fRecCylPhi[mod];
 411          delete fRecCylZ[mod];
 412   }
 413     delete fRecCylR;
 414          delete fRecCylPhi;
 415          delete fRecCylZ;
 416 }
 417 //______________________________________________________________________
 418 AliITSTrackerV1::~AliITSTrackerV1(){
 419     // Origin  A. Badala' and G.S. Pappalardo:
 420     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 421     // class destructor
 422   delete frl;
 423   delete fNRecPoints;
 424   for(Int_t i=0; i<6; i++) {
 425     delete fzmin[i];
 426          delete fzmax[i];
 427          delete fphimin[i];
 428          delete fphimax[i];
 429          delete fphidet[i];
 430   }
 431
 432   delete fzmin;
 433   delete fzmax;
 434   delete fphimin;
 435   delete fphimax;
 436   delete fphidet;
 437
 438 }
 439 //______________________________________________________________________
 440 AliITSTrackerV1 &AliITSTrackerV1::operator=(AliITSTrackerV1 obj) {
 441     // Origin  A. Badala' and G.S. Pappalardo:
 442     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 443     // assignement operator
 444
 445          *fITS = *obj.fITS;
 446     *fresult = *obj.fresult;
 447     fPtref = obj.fPtref;
 448     fChi2max = obj.fChi2max;
 449     **fvettid = **obj.fvettid;
 450     fflagvert = obj.fflagvert;
 451     Int_t imax=200,jmax=450;
 452     frl = new AliITSRad(imax,jmax);
 453     *frl = *obj.frl;
 454     fFieldFactor = obj.fFieldFactor;
 455     Int_t i;
 456     for(i=0; i<6; i++) {
 457         fNlad[i] = obj.fNlad[i];
 458         fNdet[i] = obj.fNdet[i];
 459         fAvrad[i] = obj.fAvrad[i];
 460         fDetx[i] = obj.fDetx[i];
 461         fDetz[i] = obj.fDetz[i];
 462     } // end for i
 463     fzmin = new Double_t*[6];
 464     fzmax = new Double_t*[6];
 465     Int_t im1, im2, im2max;
 466     for(im1=0; im1<6; im1++) {
 467         im2max=fNdet[im1];
 468         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 469     } // end for im1
 470     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 471     for(im1=0;im1<6;im1++) {
 472         im2max=fNlad[im1];
 473         fphimin[im1] = new Double_t[im2max];
 474         fphimax[im1] = new Double_t[im2max];
 475     } // end for im1
 476
 477     fphidet = new Double_t*[6];
 478     for(im1=0; im1<6; im1++) {
 479         im2max=fNlad[im1];
 480         fphidet[im1] = new Double_t[im2max];
 481     } // end for im1
 482     for(im1=0; im1<6; im1++) {
 483         im2max=fNdet[im1];
 484         for(im2=0; im2<im2max; im2++) {
 485             fzmin[im1][im2]=obj.fzmin[im1][im2];
 486             fzmax[im1][im2]=obj.fzmax[im1][im2];
 487         } // end for im2
 488     } // end for im1
 489     for(im1=0; im1<6; im1++) {
 490         im2max=fNlad[im1];
 491         for(im2=0; im2<im2max; im2++) {
 492             fphimin[im1][im2]=obj.fphimin[im1][im2];
 493             fphimax[im1][im2]=obj.fphimax[im1][im2];
 494             fphidet[im1][im2]=obj.fphidet[im1][im2];
 495         } // end for im2
 496     } // end for im1
 497
 498         AliITSgeom *g1 = fITS->GetITSgeom();
 499    Int_t NumOfModules = g1->GetIndexMax();
 500   fRecCylR = new Double_t *[NumOfModules];
 501   fRecCylPhi = new Double_t *[NumOfModules];
 502   fRecCylZ = new Double_t *[NumOfModules];
 503   fNRecPoints = new Int_t[NumOfModules];
 504           for(Int_t module=0; module<NumOfModules; module++) {
 505                   Int_t nRecPoints=fNRecPoints[module]=obj.fNRecPoints[module];
 506                   fRecCylR[module] = new Double_t[nRecPoints];
 507                   fRecCylPhi[module] = new Double_t[nRecPoints];
 508                   fRecCylZ[module] = new Double_t[nRecPoints];
 509                   Int_t ind;
 510                   for(ind=0; ind<nRecPoints; ind++) {
 511                          fRecCylR[module][ind]=obj.fRecCylR[module][ind];
 512                          fRecCylPhi[module][ind]=obj.fRecCylPhi[module][ind];
 513                          fRecCylZ[module][ind]=obj.fRecCylZ[module][ind];
 514                   }
 515                 }
 516
 517
 518     return *this;
 519 }
 520 //______________________________________________________________________
 521 void AliITSTrackerV1::DoTracking(Int_t evNumber,Int_t minTr,Int_t maxTr,
 522                                  TFile *file, Bool_t realmass) {
 523     // Origin   A. Badala' and G.S. Pappalardo:
 524     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 525     // The method needs the event number, the minimum and maximum order
 526     // number of TPC tracks that
 527     // are to be tracked trough the ITS, and the file where the recpoints
 528     // are registered.
 529     // The method can be called by a macro. It preforms the tracking for
 530     // all good TPC tracks
 531
 532     printf("begin DoTracking - file %p\n",file);
 533
 534     gAlice->GetEvent(evNumber);  //modificato per gestire hbt
 535
 536     AliKalmanTrack *kkprov;
 537     //kkprov->SetConvConst(100/0.299792458/0.2/fFieldFactor);
 538     kkprov->SetConvConst(1000/0.299792458/gAlice->Field()->SolenoidField());
 539    // cout<<" field = "<<gAlice->Field()->SolenoidField()<<endl;
 540
 541
 542     TFile *cf=TFile::Open("AliTPCclusters.root");
 543     AliTPCParam *digp= (AliTPCParam*)cf->Get("75x40_100x60_150x60");
 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     AliITSRecPoint *recp;    // oggi
 570         AliTPCtrack *ioTrackTPC=0;
 571     for (kk=0; kk<nentr; kk++) {
 572         ioTrackTPC=new AliTPCtrack;
 573         tbranch->SetAddress(&ioTrackTPC);
 574         tracktree->GetEvent(kk);
 575         tracker->CookLabel(ioTrackTPC,0.1);
 576         tracks.AddLast(ioTrackTPC);
 577     } // end for kk
 578     delete tracker;
 579     tf->Close();
 580
 581     Int_t nt = tracks.GetEntriesFast();
 582     cerr<<"Number of found tracks "<<nt<<endl;
 583
 584     TVector vec(5);
 585     TTree *tr=gAlice->TreeR();
 586     Int_t nent=(Int_t)tr->GetEntries();
 587     frecPoints = fITS->RecPoints();
 588
 589     Int_t numbpoints;
 590     Int_t totalpoints=0;
 591     Int_t *np = new Int_t[nent];
 592     fvettid = new Int_t* [nent];
 593     Int_t mod;
 594
 595     for (mod=0; mod<nent; mod++) {
 596         fvettid[mod]=0;
 597         fITS->ResetRecPoints();
 598         gAlice->TreeR()->GetEvent(mod);
 599         numbpoints = frecPoints->GetEntries();
 600         totalpoints+=numbpoints;
 601         np[mod] = numbpoints;
 602         //cout<<" mod = "<<mod<<"   numbpoints = "<<numbpoints<<"\n";getchar();
 603         fvettid[mod] = new Int_t[numbpoints];
 604         Int_t ii;
 605         for (ii=0;ii<numbpoints; ii++) *(fvettid[mod]+ii)=0;
 606     } // end for mod
 607
 608     AliTPCtrack *track=0;
 609
 610     if(minTr < 0) {minTr = 0; maxTr = nt-1;}
 611
 612     TVector vgeant(3);
 613
 614     TTree tracktree1("TreeT","Tree with ITS tracks");
 615     AliITSIOTrack *ioTrack=0;
 616         AliITSPid *pid=new AliITSPid(1000);  // oggi
 617
 618     tracktree1.Branch("ITStracks","AliITSIOTrack",&ioTrack,32000,0);
 619
 620     TDatabasePDG * db = new TDatabasePDG;
 621
 622     Int_t j;
 623     for (j=minTr; j<=maxTr; j++) {
 624         track=(AliTPCtrack*)tracks.UncheckedAt(j);
 625         if (!track) continue;
 626
 627         ///   mass definition ////////////////////////
 628     Double_t mass=0.13956995;
 629          Int_t pcode=211;  // a pion by default
 630
 631          if(realmass) {
 632         if(TMath::Abs(pcode)<20443) mass=db->GetParticle(pcode)->Mass();
 633          }
 634          else {
 635                  mass = track->GetMass();
 636                  cout << "Mass = " << mass << endl;
 637          }
 638
 639
 640
 641          //   new propagation to the end of TPC
 642     Double_t xk=80.;
 643    // track->PropagateTo(xk,0.,0.); //Ne if it's still there   //attenzione funziona solo se modifica in TPC
 644         // Double_t xk=77.415;
 645          track->PropagateTo(xk, 28.94, 1.204e-3);
 646     xk-=0.005;
 647     track->PropagateTo(xk, 44.77,1.71); //Tedlar
 648     xk-=0.02;
 649     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 650     xk-=2.0;
 651     track->PropagateTo(xk, 41.28, 0.029);//Nomex
 652     xk-=0.02;
 653     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 654     xk-=0.005;
 655     track->PropagateTo(xk, 44.77, 1.71); //Tedlar
 656
 657     xk=61.;
 658    // track->PropagateTo(xk,0.,0.); //C02
 659          track->PropagateTo(xk,36.2,1.98e-3); //C02        //attenzione funziona solo se modifica in TPC
 660
 661     xk -=0.005;
 662     track->PropagateTo(xk, 24.01, 2.7);    //Al
 663     xk -=0.005;
 664     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 665     xk -=0.02;
 666     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 667     xk -=0.5;
 668     track->PropagateTo(xk, 41.28, 0.029);  //Nomex
 669     xk -=0.02;
 670     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 671     xk -=0.005;
 672     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 673     xk -=0.005;
 674     track->PropagateTo(xk, 24.01, 2.7);    //Al
 675
 676         ////////////////////////////////////////////////////////////////////////////////////////////////////////
 677         //AliITSTrackV1 trackITS(*track);
 678         AliITSTrackV1 trackITS(*track, fFieldFactor);
 679         //cout<<" fFieldFactor = "<<fFieldFactor<<"\n";
 680         trackITS.PutMass(mass);   //new to add mass to track
 681         if(fresult){ delete fresult; fresult=0;}
 682         fresult = new AliITSTrackV1(trackITS);
 683
 684         AliITSTrackV1 primaryTrack(trackITS);
 685         vgeant=(*fresult).GetVertex();
 686
 687         // Definition of dv and zv for vertex constraint
 688         Double_t sigmaDv=0.0050;  Double_t sigmaZv=0.010;
 689         //Double_t sigmaDv=0.0015;  Double_t sigmaZv=0.0015;
 690         Double_t uniform= gRandom->Uniform();
 691         Double_t signdv;
 692         if(uniform<=0.5) signdv=-1.;
 693         else
 694             signdv=1.;
 695
 696         Double_t vr=TMath::Sqrt(vgeant(0)*vgeant(0)+ vgeant(1)*vgeant(1));
 697         Double_t dv=gRandom->Gaus(signdv*vr,(Float_t)sigmaDv);
 698         Double_t zv=gRandom->Gaus(vgeant(2),(Float_t)sigmaZv);
 699         //cout<<" Dv e Zv = "<<dv<<" "<<zv<<"\n";
 700         trackITS.SetDv(dv);
 701         trackITS.SetZv(zv);
 702         trackITS.SetsigmaDv(sigmaDv);
 703         trackITS.SetsigmaZv(sigmaZv);
 704         (*fresult).SetDv(dv);
 705         (*fresult).SetZv(zv);
 706         (*fresult).SetsigmaDv(sigmaDv);
 707         (*fresult).SetsigmaZv(sigmaZv);
 708         primaryTrack.SetDv(dv);
 709         primaryTrack.SetZv(zv);
 710         primaryTrack.SetsigmaDv(sigmaDv);
 711         primaryTrack.SetsigmaZv(sigmaZv);
 712         primaryTrack.PrimaryTrack(frl);
 713         TVector  d2=primaryTrack.Getd2();
 714         TVector  tgl2=primaryTrack.Gettgl2();
 715         TVector  dtgl=primaryTrack.Getdtgl();
 716         trackITS.Setd2(d2); trackITS.Settgl2(tgl2);
 717         trackITS.Setdtgl(dtgl);
 718         (*fresult).Setd2(d2); (*fresult).Settgl2(tgl2);
 719         (*fresult).Setdtgl(dtgl);
 720         /*
 721           trackITS.SetVertex(vertex); trackITS.SetErrorVertex(ervertex);
 722           (*result).SetVertex(vertex);   (*result).SetErrorVertex(ervertex);
 723         */
 724         TList *list= new TList();
 725
 726         list->AddLast(&trackITS);
 727
 728         fPtref=TMath::Abs( (trackITS).GetPt() );
 729         //cout<<" fPtref = " <<fPtref<<"\n";
 730         if(fPtref>1.0) fChi2max=40.;
 731         if(fPtref<=1.0) fChi2max=20.;
 732         if(fPtref<0.4 ) fChi2max=100.;
 733         if(fPtref<0.2 ) fChi2max=40.;
 734         // if(fPtref<0.4 ) fChi2max=30.;
 735         // if(fPtref<0.2 ) fChi2max=20.;
 736         //if(fPtref<0.2 ) fChi2max=10.;
 737         //if(fPtref<0.1 ) fChi2max=5.;
 738         //cout << "\n Pt = " << fPtref <<"\n";  //stampa
 739         RecursiveTracking(list);
 740         list->Delete();
 741         delete list;
 742
 743         Int_t itot=-1;
 744         TVector vecTotLabRef(18);
 745         Int_t lay, k;
 746         for(lay=5; lay>=0; lay--) {
 747             TVector vecLabRef(3);
 748             vecLabRef=(*fresult).GetLabTrack(lay);
 749             Float_t clustZ=(*fresult).GetZclusterTrack( lay);
 750             for(k=0; k<3; k++){
 751                 Int_t lpp=(Int_t)vecLabRef(k);
 752                 if(lpp>=0) {
 753                     TParticle *p=(TParticle*) gAlice->Particle(lpp);
 754                     Int_t pcode=p->GetPdgCode();
 755                     if(pcode==11) vecLabRef(k)=p->GetFirstMother();
 756                 } // end if
 757                 itot++; vecTotLabRef(itot)=vecLabRef(k);
 758                 if(vecLabRef(k)==0. && clustZ == -1.) vecTotLabRef(itot) =-3.;
 759             } // end for k
 760         } // end for lay
 761         Long_t labref;
 762         Int_t freq;
 763         (*fresult).Search(vecTotLabRef, labref, freq);
 764
 765         //if(freq < 6) labref=-labref;        // cinque - sei
 766         if(freq < 5) labref=-labref;        // cinque - sei
 767         (*fresult).SetLabel(labref);
 768
 769         // cout<<" progressive track number = "<<j<<"\r";
 770         // cout<<j<<"\r";
 771         Int_t numOfCluster=(*fresult).GetNumClust();
 772         //cout<<" progressive track number = "<<j<<"\n";    // stampa
 773         Long_t labITS=(*fresult).GetLabel();
 774         //cout << " ITS track label = " << labITS << "\n";      // stampa
 775         Int_t lab=track->GetLabel();
 776         //cout << " TPC track label = " << lab <<"\n";      // stampa
 777         //propagation to vertex
 778
 779         Double_t rbeam=3.;
 780         if((*fresult).DoNotCross(rbeam)) continue;  //no intersection with beampipe
 781         (*fresult).Propagation(rbeam);
 782         Double_t c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44;
 783         (*fresult).GetCElements(c00,
 784                                 c10,c11,
 785                                 c20,c21,c22,
 786                                 c30,c31,c32,c33,
 787                                 c40,c41,c42,c43,c44);
 788
 789         Double_t pt=TMath::Abs((*fresult).GetPt());
 790         Double_t dr=(*fresult).GetD();
 791         Double_t z=(*fresult).GetZ();
 792         Double_t tgl=(*fresult).GetTgl();
 793         Double_t c=(*fresult).GetC();
 794         Double_t cy=c/2.;
 795         Double_t dz=z-(tgl/cy)*TMath::ASin((*fresult).Arga(rbeam));
 796         dz-=vgeant(2);
 797         // cout<<" dr e dz alla fine = "<<dr<<" "<<dz<<"\n"; getchar();
 798         Double_t phi=(*fresult).Getphi();
 799         Double_t phivertex = phi - TMath::ASin((*fresult).ArgA(rbeam));
 800         Double_t duepi=2.*TMath::Pi();
 801         if(phivertex>duepi) phivertex-=duepi;
 802         if(phivertex<0.) phivertex+=duepi;
 803         /////////////////////////////////////////////////////////////
 804         Int_t idmodule,idpoint;
 805         if(numOfCluster >=5)  {            // cinque - sei
 806             //if(numOfCluster ==6)  {            // cinque - sei
 807             AliITSIOTrack outTrack;
 808             ioTrack=&outTrack;
 809             ioTrack->SetStatePhi(phi);
 810             ioTrack->SetStateZ(z);
 811             ioTrack->SetStateD(dr);
 812             ioTrack->SetStateTgl(tgl);
 813             ioTrack->SetStateC(c);
 814             Double_t radius=(*fresult).Getrtrack();
 815             ioTrack->SetRadius(radius);
 816             Int_t charge;
 817             if(c>0.) charge=-1;  else charge=1;
 818             ioTrack->SetCharge(charge);
 819                 Double_t trackmass=(*fresult).GetMass();         // oggi
 820                 ioTrack->SetMass(trackmass);                     // oggi
 821             ioTrack->SetCovMatrix(c00,
 822                                   c10,c11,
 823                                   c20,c21,c22,
 824                                   c30,c31,c32,c33,
 825                                   c40,c41,c42,c43,c44);
 826             Double_t px=pt*TMath::Cos(phivertex);
 827             Double_t py=pt*TMath::Sin(phivertex);
 828             Double_t pz=pt*tgl;
 829             Double_t xtrack=dr*TMath::Sin(phivertex);
 830             Double_t ytrack=dr*TMath::Cos(phivertex);
 831             Double_t ztrack=dz+vgeant(2);
 832             ioTrack->SetPx(px);
 833             ioTrack->SetPy(py);
 834             ioTrack->SetPz(pz);
 835             ioTrack->SetX(xtrack);
 836             ioTrack->SetY(ytrack);
 837             ioTrack->SetZ(ztrack);
 838             ioTrack->SetLabel(labITS);
 839             ioTrack->SetTPCLabel(lab);
 840                  ioTrack->SetDz(dz);
 841             Int_t il;
 842             /*
 843                 for(il=0;il<6; il++){
 844                 ioTrack->SetIdPoint(il,(*fresult).GetIdPoint(il));
 845                 ioTrack->SetIdModule(il,(*fresult).GetIdModule(il));
 846             } // end for il
 847             */
 848             //tracktree1.Fill();
 849                 Float_t q[4]={-1.,-1.,-1.,-1.};
 850             Float_t  globaldedx=0.;
 851             for (il=0;il<6;il++) {
 852                 idpoint=(*fresult).GetIdPoint(il);
 853                 idmodule=(*fresult).GetIdModule(il);
 854                 if(idmodule>0.) *(fvettid[idmodule]+idpoint)=1;
 855
 856                 ioTrack->SetIdPoint(il,idpoint);
 857                 ioTrack->SetIdModule(il,idmodule);
 858                 ////  for q definition
 859                 if(il>1){
 860                   if(idmodule>0.){
 861                     fITS->ResetRecPoints();
 862                     gAlice->TreeR()->GetEvent(idmodule);
 863                     recp=(AliITSRecPoint*)frecPoints->UncheckedAt(idpoint);
 864                     q[il-2]=recp->GetQ()*(*fresult).Getfcor(il-2);
 865                   }
 866                 }
 867             } // end for il
 868                 q[0]/=280.; q[1]/=280.;
 869             q[2]/=38.; q[3]/=38.;
 870
 871  // cout<<" q prima = "<<q[0]<<" "<<q[1]<<" "<<q[2]<<" "<<q[3]<<"\n"; getchar();
 872
 873      Int_t swap;
 874   do{
 875     swap=0;
 876     for (il=0; il<3; il++) {
 877       if (q[il]<=q[il+1]) continue;
 878       Float_t tmp=q[il];
 879       q[il]=q[il+1]; q[il+1]=tmp;
 880       swap++;
 881     }
 882   } while(swap);
 883
 884
 885   // cout<<" q dopo = "<<q[0]<<" "<<q[1]<<" "<<q[2]<<" "<<q[3]<<"\n"; getchar();
 886
 887     if(q[0]<0.) {
 888       q[0]=q[1];
 889       q[1]=q[2];
 890       q[2]=q[3];
 891       q[3]=-1.;
 892     }
 893
 894   // cout<<" q  dopo if = "<<q[0]<<" "<<q[1]<<" "<<q[2]<<" "<<q[3]<<"\n"; getchar();
 895
 896     globaldedx=(q[0]+q[1])/2.;
 897
 898    // if(q[3]> 0.) globaldedx=(q[0]+q[1]+q[2]+q[3])/4.;
 899    //      else    globaldedx=(q[0]+q[1]+q[2])/3.;
 900
 901     ioTrack->SetdEdx(globaldedx);
 902     ioTrack->SetPid(pid->GetPcode(ioTrack));
 903
 904             tracktree1.Fill();
 905         } // end if on numOfCluster
 906         //gObjectTable->Print();    // stampa memoria
 907     }  //  end for (int j=minTr; j<=maxTr; j++)
 908     delete db;
 909     static Bool_t first=kTRUE;
 910     static TFile *tfile;
 911     if(first) {
 912         tfile=new TFile("itstracks.root","RECREATE");
 913         //cout<<"I have opened itstracks.root file "<<endl;
 914     } // end if
 915     first=kFALSE;
 916     tfile->cd();
 917     tfile->ls();
 918     char hname[30];
 919     sprintf(hname,"TreeT%d",evNumber);
 920         cout << "Number of saved ITS tracks " << tracktree1.GetEntries() << endl;
 921     tracktree1.Write(hname);
 922
 923     TTree *fAli=gAlice->TreeK();
 924     TFile *fileAli=0;
 925     if (fAli) fileAli =fAli->GetCurrentFile();
 926     fileAli->cd();
 927     ////////////////////////////////////////////////////////////////////
 928
 929     printf("delete vectors\n");
 930     if(np) delete [] np;
 931     if(fvettid) delete [] fvettid;
 932     if(fresult) {delete fresult; fresult=0;}
 933 }
 934 //______________________________________________________________________
 935 void AliITSTrackerV1::RecursiveTracking(TList *trackITSlist) {
 936     //   This function perform the recursive tracking in ITS detectors
 937     // reference is a pointer to the final best track
 938     // Origin  A. Badala' and G.S. Pappalardo:
 939     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 940     // The authors thank Mariana Bondila to have help them to resolve some
 941     // problems.  July-2000
 942
 943     //Rlayer[0]=4.; Rlayer[1]=7.;  Rlayer[2]=14.9;
 944     // Rlayer[3]=23.8;  Rlayer[4]=39.1;  Rlayer[5]=43.6; //vecchio
 945
 946     //////////////////////
 947     Float_t sigmaphil[6], sigmazl[6];
 948     sigmaphil[0]=1.44e-6/(fAvrad[0]*fAvrad[0]);
 949     sigmaphil[1]=1.44e-6/(fAvrad[1]*fAvrad[1]);
 950     sigmaphil[2]=1.444e-5/(fAvrad[2]*fAvrad[2]);
 951     sigmaphil[3]=1.444e-5/(fAvrad[3]*fAvrad[3]);
 952     sigmaphil[4]=4e-6/(fAvrad[4]*fAvrad[4]);
 953     sigmaphil[5]=4e-6/(fAvrad[5]*fAvrad[5]);
 954     sigmazl[0]=1e-2;
 955     sigmazl[1]=1e-2;
 956     sigmazl[2]=7.84e-4;
 957     sigmazl[3]=7.84e-4;
 958     sigmazl[4]=0.6889;
 959     sigmazl[5]=0.6889;
 960     ///////////////////////////////////////////////////////////
 961     Int_t index;
 962     AliITSgeom *g1 = fITS->GetITSgeom();
 963     AliITSRecPoint *recp;
 964     for(index =0; index<trackITSlist->GetSize(); index++) {
 965         AliITSTrackV1 *trackITS = (AliITSTrackV1 *) trackITSlist->At(index);
 966         if((*trackITS).GetLayer()==7) fresult->SetChi2(10.223e140);
 967         // cout <<" Layer inizio = "<<(*trackITS).GetLayer()<<"\n";
 968         //  cout<<"fvtrack =" <<"\n";
 969         //  cout << (*trackITS)(0) << " "<<(*trackITS)(1)<<" "
 970         //       <<(*trackITS)(2)<<" "<<(*trackITS)(3)<<" "
 971         //       <<(*trackITS)(4)<<"\n";
 972         //  cout<< " rtrack = "<<(*trackITS).Getrtrack()<<"\n";
 973         //  cout<< " Pt = "<<(*trackITS).GetPt()<<"\n";
 974         //  getchar();
 975         Double_t chi2Now, chi2Ref;
 976         Float_t numClustRef = fresult->GetNumClust();
 977         if((*trackITS).GetLayer()==1 ) {
 978             chi2Now = trackITS->GetChi2();
 979             Float_t numClustNow = trackITS->GetNumClust();
 980             if(trackITS->GetNumClust())
 981                 chi2Now /= (Double_t)trackITS->GetNumClust();
 982             chi2Ref = fresult->GetChi2();
 983             if(fresult->GetNumClust())
 984                 chi2Ref /= (Double_t)fresult->GetNumClust();
 985             //cout<<" chi2Now and chi2Ref = "<<chi2Now<<" "<<chi2Ref<<"\n";
 986             if( numClustNow > numClustRef ) {*fresult = *trackITS;}
 987             if((numClustNow == numClustRef )&&
 988                (chi2Now < chi2Ref))  {
 989                 *fresult = *trackITS;
 990             } // end if
 991             continue;
 992         } // end if
 993
 994         if(trackITS->Getfnoclust()>=2)  continue;
 995         Float_t numClustNow = trackITS->GetNumClust();
 996         if(numClustNow) {
 997             chi2Now = trackITS->GetChi2();
 998
 999             if(numClustNow<numClustRef && chi2Now>fresult->GetChi2()) continue;
1000             //cout<<" chi2Now =  "<<chi2Now<<"\n";
1001
1002             chi2Now/=numClustNow;
1003             if(fPtref > 1.0 && chi2Now > 30.) continue;
1004             if((fPtref >= 0.6 && fPtref<=1.0) && chi2Now > 40.) continue;
1005             // if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 40.) continue;
1006             // if(fPtref <= 0.2 && chi2Now > 8.) continue;
1007             if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 30.) continue;
1008             if(fPtref <= 0.2 && chi2Now > 7.) continue;
1009             /////////////////////////////
1010         } // end if
1011
1012         Int_t layerInit = (*trackITS).GetLayer();
1013         Int_t layernew = layerInit - 2;// -1 for new layer, -1 for matrix index
1014         TList listoftrack;
1015         Int_t ladp, ladm, detp,detm,ladinters,detinters;
1016         Int_t layerfin=layerInit-1;
1017         // cout<<"Prima di intersection \n";
1018         Int_t  outinters=Intersection(*trackITS,layerfin,ladinters,detinters);
1019         // cout<<" outinters = "<<outinters<<"\n";
1020         //  cout<<" Layer ladder detector intersection ="
1021         //      <<layerfin<<" "<<ladinters<<" "<<detinters<<"\n";
1022         //  cout << " phiinters zinters = "<<(*trackITS)(0)
1023         //       << " "<<(*trackITS)(1)<<"\n"; getchar();
1024         if(outinters==-1) continue;
1025         Int_t flaghit=0;
1026         (*trackITS).SetLayer(layerfin);  // oggi
1027         (*trackITS).Setfcor();           // oggi
1028         if(outinters==0){
1029             TVector toucLad(9), toucDet(9);
1030             Int_t lycur=layerfin;
1031             ladp=ladinters+1;
1032             ladm=ladinters-1;
1033             if(ladm <= 0) ladm=fNlad[layerfin-1];
1034             if(ladp > fNlad[layerfin-1]) ladp=1;
1035             detp=detinters+1;
1036             detm=detinters-1;
1037             Int_t idetot=1;
1038             /*
1039               toucLad(0)=ladinters; toucLad(1)=ladm; toucLad(2)=ladp;
1040               toucLad(3)=ladinters; toucLad(4)=ladm; toucLad(5)=ladp;
1041               toucLad(6)=ladinters; toucLad(7)=ladm; toucLad(8)=ladp;
1042               toucDet(0)=detinters; toucDet(1)=detinters; toucDet(2)=detinters;
1043               if(detm > 0 && detp <= fNdet[layerfin-1]) {
1044                    idetot=9;
1045                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1046                    toucDet(6)=detp; toucDet(7)=detp; toucDet(8)=detp;
1047               } // end if
1048               if(detm > 0 && detp > fNdet[layerfin-1]) {
1049                    idetot=6;
1050                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1051              } // end if
1052              if(detm <= 0 && detp <= fNdet[layerfin-1]) {
1053                   idetot=6;
1054                   toucDet(3)=detp; toucDet(4)=detp; toucDet(5)=detp;
1055              } // end if
1056             */
1057             Float_t epsphi=5.0, epsz=5.0;
1058             if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1059             // new definition of idetot e toucLad e toucDet to be
1060             // transformed in a method
1061             // these values could be modified
1062             Float_t pigre=TMath::Pi();
1063             Float_t rangephi=5., rangez=5.;
1064             if(layerfin==1 || layerfin ==2){
1065                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1066                                                 (*trackITS).GetSigmaphi());
1067                 rangez = 40.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1068                                               (*trackITS).GetSigmaZ());
1069             } // end if
1070             if(layerfin==3 || layerfin ==4){
1071                 //rangephi=30.*fepsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1072                 //                                 (*trackITS).GetSigmaphi());
1073                 //rangez = 40.*fepsz*TMath::Sqrt(sigmazl[layerfin-1]+
1074                 //                               (*trackITS).GetSigmaZ());
1075                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1076                                                 (*trackITS).GetSigmaphi());
1077                 rangez = 50.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1078                                               (*trackITS).GetSigmaZ());
1079             } // end if
1080             if(layerfin==5 || layerfin ==6){
1081                 rangephi=20.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1082                                                 (*trackITS).GetSigmaphi());
1083                 rangez =5.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1084                                             (*trackITS).GetSigmaZ());
1085             } // end if
1086             Float_t phinters, zinters;
1087             phinters=(*trackITS).Getphi();
1088             zinters=(*trackITS).GetZ();
1089             Float_t distz = 0.0;
1090             Float_t phicm, phicp, distphim, distphip;
1091             phicm=phinters;
1092                  if(phinters>fphimax[layerfin-1][ladm-1]) phicm=phinters-2*pigre;  //corretto il 20-11-2001
1093                  distphim=TMath::Abs(phicm-fphimax[layerfin-1][ladm-1]);  //corretto il 20-11-2001
1094             phicp=phinters;
1095                  //cout<<" fNlad[layerfin-1] e ladp = "<<fNlad[layerfin-1]<<" "<<ladp<<endl;
1096                  if(phinters>fphimin[layerfin-1][ladp-1]) phicp=phinters-2.*pigre;   //corretto il 20-11-2001
1097                  distphip=TMath::Abs(phicp-fphimin[layerfin-1][ladp-1]);      //corretto il 20-11-2001
1098             Int_t flagzmin=0;
1099             Int_t flagzmax=0;
1100             idetot=1;
1101             toucLad(0)=ladinters; toucDet(0)=detinters;
1102             if(detm>0) distz=TMath::Abs(zinters-fzmax[layerfin-1][detm-1]);
1103             if(detm>0 && rangez>=distz){
1104                 flagzmin=1;
1105                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detm;
1106                 if(rangephi>=distphim){
1107                     idetot++;
1108                     toucLad(idetot-1)=ladm;
1109                     toucDet(idetot-1)=detinters;
1110                     idetot++;
1111                     toucLad(idetot-1)=ladm;
1112                     toucDet(idetot-1)=detm;
1113                 } // end if
1114                 if(rangephi>=distphip){
1115                     idetot++;
1116                     toucLad(idetot-1)=ladp;
1117                     toucDet(idetot-1)=detinters;
1118                     idetot++;
1119                     toucLad(idetot-1)=ladp;
1120                     toucDet(idetot-1)=detm;
1121                 } // end if
1122             }  //end detm>0....
1123             if(detp<=fNdet[layerfin-1])
1124                 distz=TMath::Abs(zinters-fzmin[layerfin-1][detp-1]);
1125             if(detp<=fNdet[layerfin-1] && rangez>=distz){
1126                 flagzmax=1;
1127                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detp;
1128                 if(rangephi>=distphim){
1129                     idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detp;
1130                     if(flagzmin == 0) {
1131                         idetot++;
1132                         toucLad(idetot-1)=ladm;
1133                         toucDet(idetot-1)=detinters;
1134                     } // end if
1135                 } // end if
1136                 if(rangephi>=distphip){
1137                     idetot++;
1138                     toucLad(idetot-1)=ladp;
1139                     toucDet(idetot-1)=detp;
1140                     if(flagzmin == 0) {
1141                         idetot++;
1142                         toucLad(idetot-1)=ladp;
1143                         toucDet(idetot-1)=detinters;
1144                     } // end if
1145                 } // end if
1146             }  //end detm<fNdet[.......
1147
1148             if(flagzmin == 0 && flagzmax==0){
1149                 if(rangephi>=distphim){
1150                     idetot++;
1151                     toucLad(idetot-1)=ladm;
1152                     toucDet(idetot-1)=detinters;
1153                 } // end if
1154                 if(rangephi>=distphip){
1155                     idetot++;
1156                     toucLad(idetot-1)=ladp;
1157                     toucDet(idetot-1)=detinters;
1158                 } // end if
1159             } // end if
1160             ////////////////////////////////////////////////////////////
1161             Int_t iriv;
1162             for (iriv=0; iriv<idetot; iriv++) {  //for on detectors
1163                 ///////////////////////////////////////////////////////
1164                 /*** Rec points sorted by module *****/
1165                 /**************************************/
1166                 Int_t indexmod;
1167                 indexmod = g1->GetModuleIndex(lycur,(Int_t)toucLad(iriv),
1168                                               (Int_t)toucDet(iriv));
1169                 fITS->ResetRecPoints();
1170                 gAlice->TreeR()->GetEvent(indexmod);
1171                 Int_t npoints=frecPoints->GetEntries();
1172
1173                 Int_t indnew;
1174                 for(indnew=0; indnew<npoints; indnew++){
1175                     if (*(fvettid[indexmod]+indnew)==0)
1176                         recp =(AliITSRecPoint*)frecPoints->UncheckedAt(indnew);
1177                     else
1178                         continue;
1179                     TVector cluster(3),vecclust(9);
1180                     //vecclust(6)=vecclust(7)=vecclust(8)=-1.;
1181                     Double_t sigma[2];
1182   // now vecclust is with cylindrical cohordinates
1183                vecclust(0)=(Float_t)fRecCylR[indexmod][indnew];
1184                vecclust(1)=(Float_t)fRecCylPhi[indexmod][indnew];
1185                vecclust(2)=(Float_t)fRecCylZ[indexmod][indnew];
1186                     vecclust(3) = (Float_t)recp->fTracks[0];
1187                     vecclust(4) = (Float_t)indnew;
1188                     vecclust(5) = (Float_t)indexmod;
1189                     vecclust(6) = (Float_t)recp->fTracks[0];
1190                     vecclust(7) = (Float_t)recp->fTracks[1];
1191                     vecclust(8) = (Float_t)recp->fTracks[2];
1192                     sigma[0] = (Double_t)  recp->GetSigmaX2();
1193                     sigma[1] = (Double_t) recp->GetSigmaZ2();
1194
1195                          cluster(0)=fRecCylR[indexmod][indnew];
1196           cluster(1)=fRecCylPhi[indexmod][indnew];
1197                          cluster(2)=fRecCylZ[indexmod][indnew];
1198
1199                     // cout<<" layer = "<<play<<"\n";
1200                     // cout<<" cluster prima = "<<vecclust(0)<<" "
1201                     //     <<vecclust(1)<<" "
1202                     //     <<vecclust(2)<<"\n"; getchar();
1203
1204                     Float_t sigmatotphi, sigmatotz;
1205                     // Float_t epsphi=5.0, epsz=5.0;
1206                     //if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1207                     Double_t rTrack=(*trackITS).Getrtrack();
1208                     Double_t sigmaphi=sigma[0]/(rTrack*rTrack);
1209                     sigmatotphi=epsphi*TMath::Sqrt(sigmaphi +
1210                                                    (*trackITS).GetSigmaphi());
1211                     sigmatotz=epsz*TMath::Sqrt(sigma[1] +
1212                                                (*trackITS).GetSigmaZ());
1213                     //cout<<"cluster e sigmatotphi e track = "<<cluster(0)
1214                     //    <<" "<<cluster(1)<<" "<<sigmatotphi<<" "
1215                     //    <<vecclust(3)<<"\n";
1216                     //if(vecclust(3)==481) getchar();
1217                     if(cluster(1)<6. && (*trackITS).Getphi()>6.)
1218                         cluster(1)=cluster(1)+(2.*TMath::Pi());
1219                     if(cluster(1)>6. && (*trackITS).Getphi()<6.)
1220                         cluster(1)=cluster(1)-(2.*TMath::Pi());
1221                     if(TMath::Abs(cluster(1)-(*trackITS).Getphi())>sigmatotphi)
1222                         continue;
1223                     // cout<<" supero sigmaphi \n";
1224                     AliITSTrackV1 *newTrack = new AliITSTrackV1((*trackITS));
1225                     //(*newTrack).SetLayer((*trackITS).GetLayer()-1);
1226                     if (TMath::Abs(rTrack-cluster(0))/rTrack>1e-6)
1227                         (*newTrack).Correct(Double_t(cluster(0)));
1228                     //cout<<" cluster(2) e(*newTrack).GetZ()="<<cluster(2)<<" "
1229                     //    << (*newTrack).GetZ()<<"\n";
1230                     if(TMath::Abs(cluster(2)-(*newTrack).GetZ()) > sigmatotz){
1231                         delete newTrack;
1232                         continue;
1233                     } // end if
1234                     Double_t sigmanew[2];
1235                     sigmanew[0]= sigmaphi;
1236                     sigmanew[1]=sigma[1];
1237                     Double_t m[2];
1238                     m[0]=cluster(1);
1239                     m[1]=cluster(2);
1240                     //  Double_t chi2pred=newTrack->GetPredChi2(m,sigmanew);
1241                     // cout<<" chi2pred = "<<chi2pred<<"\n";
1242                     // if(chi2pred>fChi2max) continue; //aggiunto il 30-7-2001
1243                     if(iriv == 0) flaghit=1;
1244                     (*newTrack).AddMS(frl);  // add the multiple scattering
1245                                              //matrix to the covariance matrix
1246                     (*newTrack).AddEL(frl,1.,0);
1247
1248                     if(fflagvert){
1249                         KalmanFilterVert(newTrack,cluster,sigmanew);
1250                         //KalmanFilterVert(newTrack,cluster,sigmanew,chi2pred);
1251                     }else{
1252                         KalmanFilter(newTrack,cluster,sigmanew);
1253                     } // end if
1254                     (*newTrack).PutCluster(layernew, vecclust);
1255                     newTrack->AddClustInTrack();
1256                     listoftrack.AddLast(newTrack);
1257                 }   // end for indnew
1258             }  // end of for on detectors (iriv)
1259         }//end if(outinters==0)
1260
1261         if(flaghit==0 || outinters==-2) {
1262             AliITSTrackV1 *newTrack = new AliITSTrackV1(*trackITS);
1263             (*newTrack).Setfnoclust();
1264             //(*newTrack).SetLayer((*trackITS).GetLayer()-1);
1265             (*newTrack).AddMS(frl);  // add the multiple scattering matrix
1266                                      // to the covariance matrix
1267             (*newTrack).AddEL(frl,1.,0);
1268             listoftrack.AddLast(newTrack);
1269         } // end if
1270
1271         //gObjectTable->Print();   // stampa memoria
1272
1273         RecursiveTracking(&listoftrack);
1274         listoftrack.Delete();
1275     } // end of for on tracks (index)
1276
1277     //gObjectTable->Print();   // stampa memoria
1278 }
1279 //______________________________________________________________________
1280 Int_t AliITSTrackerV1::Intersection(AliITSTrackV1 &track,Int_t layer,
1281                                     Int_t &ladder,Int_t &detector) {
1282     // Origin  A. Badala' and G.S. Pappalardo
1283     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1284     // Found the intersection and the detector
1285
1286     Double_t rk=fAvrad[layer-1];
1287     if(track.DoNotCross(rk)){ /*cout<< " Do not cross \n";*/ return -1;}
1288     track.Propagation(rk);
1289     Double_t zinters=track.GetZ();
1290     Double_t phinters=track.Getphi();
1291     //cout<<"zinters = "<<zinters<<"  phinters = "<<phinters<<"\n";
1292
1293     TVector det(9);
1294     TVector listDet(2);
1295     TVector distZCenter(2);
1296
1297     Int_t iz=0;
1298     Int_t iD;
1299     for(iD = 1; iD<= fNdet[layer-1]; iD++) {
1300         if(zinters > fzmin[layer-1][iD-1] && zinters <= fzmax[layer-1][iD-1]) {
1301             if(iz>1) {
1302                 cout<< " Errore su iz in Intersection \n";
1303                 getchar();
1304             }else {
1305                 listDet(iz)= iD; distZCenter(iz)=TMath::Abs(zinters-det(2));
1306                 iz++;
1307             } // end if
1308         } // end if
1309     } // end for iD
1310
1311     if(iz==0) {/* cout<< " No detector along Z \n";*/ return -2;}
1312     detector=Int_t (listDet(0));
1313     if(iz>1 && (distZCenter(0)>distZCenter(1)))   detector=Int_t (listDet(1));
1314
1315     TVector listLad(2);
1316     TVector distPhiCenter(2);
1317     Int_t ip=0;
1318     Double_t pigre=TMath::Pi();
1319     Int_t iLd;
1320     for(iLd = 1; iLd<= fNlad[layer-1]; iLd++) {
1321         Double_t phimin=fphimin[layer-1][iLd-1];
1322         Double_t phimax=fphimax[layer-1][iLd-1];
1323         Double_t phidet=fphidet[layer-1][iLd-1];
1324         Double_t phiconfr=phinters;
1325         if(phimin>phimax) {
1326             //if(phimin <5.5) {cout<<" Error in Intersection for phi \n";
1327             // getchar();}
1328             phimin-=(2.*pigre);
1329             if(phinters>(1.5*pigre)) phiconfr=phinters-(2.*pigre);
1330             if(phidet>(1.5*pigre)) phidet-=(2.*pigre);
1331         } // end if
1332         if(phiconfr>phimin && phiconfr<= phimax) {
1333             if(ip>1) {
1334                 cout<< " Errore su ip in Intersection \n"; getchar();
1335             }else  {
1336                 listLad(ip)= iLd;
1337                 distPhiCenter(ip)=TMath::Abs(phiconfr-phidet); ip++;
1338             } // end if
1339         } // end if
1340     } // end for iLd
1341     if(ip==0) { cout<< " No detector along phi \n"; getchar();}
1342     ladder=Int_t (listLad(0));
1343     if(ip>1 && (distPhiCenter(0)>distPhiCenter(1)))  ladder=Int_t (listLad(1));
1344     return 0;
1345 }
1346 //______________________________________________________________________
1347 void AliITSTrackerV1::KalmanFilter(AliITSTrackV1 *newTrack,TVector &cluster,
1348                                    Double_t sigma[2]){
1349     //Origin  A. Badala' and G.S. Pappalardo:
1350     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1351     // Kalman filter without vertex constraint
1352     ////// Evaluation of the measurement vector ////////////////////////
1353     Double_t m[2];
1354     Double_t rk,phik,zk;
1355     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1356     m[0]=phik;    m[1]=zk;
1357     //////////////////////// Evaluation of the error matrix V  /////////
1358     Double_t v00=sigma[0];
1359     Double_t v11=sigma[1];
1360     ////////////////////////////////////////////////////////////////////
1361     Double_t cin00,cin10,cin20,cin30,cin40,cin11,cin21,cin31,cin41,cin22,
1362              cin32,cin42,cin33,cin43,cin44;
1363
1364     newTrack->GetCElements(cin00,
1365                            cin10,cin11,
1366                            cin20,cin21,cin22,
1367                            cin30,cin31,cin32,cin33,
1368                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1369     Double_t rold00=cin00+v00;
1370     Double_t rold10=cin10;
1371     Double_t rold11=cin11+v11;
1372     ////////////////////// R matrix inversion  /////////////////////////
1373     Double_t det=rold00*rold11-rold10*rold10;
1374     Double_t r00=rold11/det;
1375     Double_t r10=-rold10/det;
1376     Double_t r11=rold00/det;
1377     ////////////////////////////////////////////////////////////////////
1378     Double_t k00=cin00*r00+cin10*r10;
1379     Double_t k01=cin00*r10+cin10*r11;
1380     Double_t k10=cin10*r00+cin11*r10;
1381     Double_t k11=cin10*r10+cin11*r11;
1382     Double_t k20=cin20*r00+cin21*r10;
1383     Double_t k21=cin20*r10+cin21*r11;
1384     Double_t k30=cin30*r00+cin31*r10;
1385     Double_t k31=cin30*r10+cin31*r11;
1386     Double_t k40=cin40*r00+cin41*r10;
1387     Double_t k41=cin40*r10+cin41*r11;
1388     Double_t x0,x1,x2,x3,x4;
1389     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1390     Double_t savex0=x0, savex1=x1;
1391     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1);
1392     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1);
1393     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1);
1394     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1);
1395     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1);
1396     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1397     c00=cin00-k00*cin00-k01*cin10;
1398     c10=cin10-k00*cin10-k01*cin11;
1399     c20=cin20-k00*cin20-k01*cin21;
1400     c30=cin30-k00*cin30-k01*cin31;
1401     c40=cin40-k00*cin40-k01*cin41;
1402     c11=cin11-k10*cin10-k11*cin11;
1403     c21=cin21-k10*cin20-k11*cin21;
1404     c31=cin31-k10*cin30-k11*cin31;
1405     c41=cin41-k10*cin40-k11*cin41;
1406     c22=cin22-k20*cin20-k21*cin21;
1407     c32=cin32-k20*cin30-k21*cin31;
1408     c42=cin42-k20*cin40-k21*cin41;
1409     c33=cin33-k30*cin30-k31*cin31;
1410     c43=cin43-k30*cin40-k31*cin41;
1411     c44=cin44-k40*cin40-k41*cin41;
1412     newTrack->PutXElements(x0,x1,x2,x3,x4);  // put the new state vector
1413     newTrack->PutCElements(c00,
1414                            c10,c11,
1415                            c20,c21,c22,
1416                            c30,c31,c32,c33,
1417                            c40,c41,c42,c43,c44); // put in track the
1418                                                  // new cov matrix
1419     Double_t vmcold00=v00-c00;
1420     Double_t vmcold10=-c10;
1421     Double_t vmcold11=v11-c11;
1422     ////////////////////// Matrix vmc inversion  ///////////////////////
1423     det=vmcold00*vmcold11-vmcold10*vmcold10;
1424     Double_t vmc00=vmcold11/det;
1425     Double_t vmc10=-vmcold10/det;
1426     Double_t vmc11=vmcold00/det;
1427     ////////////////////////////////////////////////////////////////////
1428   Double_t chi2=(m[0]-x0)*( vmc00*(m[0]-x0) + 2.*vmc10*(m[1]-x1) ) +
1429                 (m[1]-x1)*vmc11*(m[1]-x1);
1430   newTrack->SetChi2(newTrack->GetChi2()+chi2);
1431 }
1432 //----------------------------------------------------------------------
1433 //void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1434 //                                       TVector &cluster,Double_t sigma[2]){
1435 void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1436                                        TVector &cluster,Double_t sigma[2]
1437                                        /*, Double_t chi2pred*/){
1438     //Origin  A. Badala' and G.S. Pappalardo:
1439     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1440     // Kalman filter with vertex constraint
1441     ///////////////////// Evaluation of the measurement vector m ////////
1442     Double_t m[4];
1443     Double_t rk,phik,zk;
1444     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1445     m[0]=phik;    m[1]=zk;
1446     Double_t cc=(*newTrack).GetC();
1447     Double_t zv=(*newTrack).GetZv();
1448     Double_t dv=(*newTrack).GetDv();
1449     Double_t cy=cc/2.;
1450     Double_t tgl= (zk-zv)*cy/TMath::ASin(cy*rk);
1451     m[2]=dv;    m[3]=tgl;
1452     /////////////////////// Evaluation of the error matrix V  //////////
1453     Int_t layer=newTrack->GetLayer();
1454     Double_t v00=sigma[0];
1455     Double_t v11=sigma[1];
1456     Double_t v31=sigma[1]/rk;
1457     Double_t sigmaDv=newTrack->GetsigmaDv();
1458     Double_t v22=sigmaDv*sigmaDv  + newTrack->Getd2(layer-1);
1459     Double_t v32=newTrack->Getdtgl(layer-1);
1460     Double_t sigmaZv=newTrack->GetsigmaZv();
1461     Double_t v33=(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+newTrack->Gettgl2(layer-1);
1462     //////////////////////////////////////////////////////////////////
1463     Double_t cin00,cin10,cin11,cin20,cin21,cin22,
1464              cin30,cin31,cin32,cin33,cin40,cin41,cin42,cin43,cin44;
1465     newTrack->GetCElements(cin00,
1466                            cin10,cin11,
1467                            cin20,cin21,cin22,
1468                            cin30,cin31,cin32,cin33,
1469                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1470     Double_t r[4][4];
1471     r[0][0]=cin00+v00;
1472     r[1][0]=cin10;
1473     r[2][0]=cin20;
1474     r[3][0]=cin30;
1475     r[1][1]=cin11+v11;
1476     r[2][1]=cin21;
1477     r[3][1]=cin31+sigma[1]/rk;
1478     r[2][2]=cin22+sigmaDv*sigmaDv+newTrack->Getd2(layer-1);
1479     r[3][2]=cin32+newTrack->Getdtgl(layer-1);
1480     r[3][3]=cin33+(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+
1481                                     newTrack->Gettgl2(layer-1);
1482     r[0][1]=r[1][0]; r[0][2]=r[2][0]; r[0][3]=r[3][0];
1483     r[1][2]=r[2][1]; r[1][3]=r[3][1]; r[2][3]=r[3][2];
1484     /////////////////////  Matrix R inversion //////////////////////////
1485     const Int_t kn=4;
1486     Double_t big, hold;
1487     Double_t d=1.;
1488     Int_t ll[kn],mm[kn];
1489     Int_t i,j,k;
1490
1491     for(k=0; k<kn; k++) {
1492         ll[k]=k;
1493         mm[k]=k;
1494         big=r[k][k];
1495         for(j=k; j<kn ; j++) {
1496             for (i=j; i<kn; i++) {
1497                 if(TMath::Abs(big) < TMath::Abs(r[i][j]) ) {
1498                     big=r[i][j];
1499                     ll[k]=i;
1500                     mm[k]=j;
1501                 } // end if
1502             } // end for i
1503         } // end for j
1504         //
1505         j= ll[k];
1506         if(j > k) {
1507             for(i=0; i<kn; i++) {
1508                 hold=-r[k][i];
1509                 r[k][i]=r[j][i];
1510                 r[j][i]=hold;
1511             } // end for i
1512         }// end if
1513         //
1514         i=mm[k];
1515         if(i > k ) {
1516             for(j=0; j<kn; j++) {
1517                 hold=-r[j][k];
1518                 r[j][k]=r[j][i];
1519                 r[j][i]=hold;
1520             } // end for j
1521         } // end if
1522         //
1523         if(!big) {
1524             d=0.;
1525             cout << "Singular matrix\n";
1526         } // end if
1527         for(i=0; i<kn; i++) {
1528             if(i == k) { continue; }
1529             r[i][k]=r[i][k]/(-big);
1530         } // end for i
1531         //
1532         for(i=0; i<kn; i++) {
1533             hold=r[i][k];
1534             for(j=0; j<kn; j++) {
1535                 if(i == k || j == k) continue;
1536                 r[i][j]=hold*r[k][j]+r[i][j];
1537             } // end for j
1538         } // end of ri
1539         //
1540         for(j=0; j<kn; j++) {
1541             if(j == k) continue;
1542             r[k][j]=r[k][j]/big;
1543         } // end for j
1544         //
1545         d=d*big;
1546         //
1547         r[k][k]=1./big;
1548     } // end for k
1549     //
1550     for(k=kn-1; k>=0; k--) {
1551         i=ll[k];
1552         if(i > k) {
1553             for (j=0; j<kn; j++) {
1554                 hold=r[j][k];
1555                 r[j][k]=-r[j][i];
1556                 r[j][i]=hold;
1557             } // end for j
1558         } // end if i
1559         j=mm[k];
1560         if(j > k) {
1561             for (i=0; i<kn; i++) {
1562                 hold=r[k][i];
1563                 r[k][i]=-r[j][i];
1564                 r[j][i]=hold;
1565             } // end for i
1566         } // end if
1567     } // end for k
1568     ////////////////////////////////////////////////////////////////////
1569     Double_t k00=cin00*r[0][0]+cin10*r[1][0]+cin20*r[2][0]+cin30*r[3][0];
1570     Double_t k01=cin00*r[1][0]+cin10*r[1][1]+cin20*r[2][1]+cin30*r[3][1];
1571     Double_t k02=cin00*r[2][0]+cin10*r[2][1]+cin20*r[2][2]+cin30*r[3][2];
1572     Double_t k03=cin00*r[3][0]+cin10*r[3][1]+cin20*r[3][2]+cin30*r[3][3];
1573     Double_t k10=cin10*r[0][0]+cin11*r[1][0]+cin21*r[2][0]+cin31*r[3][0];
1574     Double_t k11=cin10*r[1][0]+cin11*r[1][1]+cin21*r[2][1]+cin31*r[3][1];
1575     Double_t k12=cin10*r[2][0]+cin11*r[2][1]+cin21*r[2][2]+cin31*r[3][2];
1576     Double_t k13=cin10*r[3][0]+cin11*r[3][1]+cin21*r[3][2]+cin31*r[3][3];
1577     Double_t k20=cin20*r[0][0]+cin21*r[1][0]+cin22*r[2][0]+cin32*r[3][0];
1578     Double_t k21=cin20*r[1][0]+cin21*r[1][1]+cin22*r[2][1]+cin32*r[3][1];
1579     Double_t k22=cin20*r[2][0]+cin21*r[2][1]+cin22*r[2][2]+cin32*r[3][2];
1580     Double_t k23=cin20*r[3][0]+cin21*r[3][1]+cin22*r[3][2]+cin32*r[3][3];
1581     Double_t k30=cin30*r[0][0]+cin31*r[1][0]+cin32*r[2][0]+cin33*r[3][0];
1582     Double_t k31=cin30*r[1][0]+cin31*r[1][1]+cin32*r[2][1]+cin33*r[3][1];
1583     Double_t k32=cin30*r[2][0]+cin31*r[2][1]+cin32*r[2][2]+cin33*r[3][2];
1584     Double_t k33=cin30*r[3][0]+cin31*r[3][1]+cin32*r[3][2]+cin33*r[3][3];
1585     Double_t k40=cin40*r[0][0]+cin41*r[1][0]+cin42*r[2][0]+cin43*r[3][0];
1586     Double_t k41=cin40*r[1][0]+cin41*r[1][1]+cin42*r[2][1]+cin43*r[3][1];
1587     Double_t k42=cin40*r[2][0]+cin41*r[2][1]+cin42*r[2][2]+cin43*r[3][2];
1588     Double_t k43=cin40*r[3][0]+cin41*r[3][1]+cin42*r[3][2]+cin43*r[3][3];
1589
1590     Double_t x0,x1,x2,x3,x4;
1591     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1592     Double_t savex0=x0, savex1=x1, savex2=x2, savex3=x3;
1593     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1)+k02*(m[2]-savex2)+
1594         k03*(m[3]-savex3);
1595     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1)+k12*(m[2]-savex2)+
1596         k13*(m[3]-savex3);
1597     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1)+k22*(m[2]-savex2)+
1598         k23*(m[3]-savex3);
1599     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1)+k32*(m[2]-savex2)+
1600         k33*(m[3]-savex3);
1601     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1)+k42*(m[2]-savex2)+
1602         k43*(m[3]-savex3);
1603     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1604     c00=cin00-k00*cin00-k01*cin10-k02*cin20-k03*cin30;
1605     c10=cin10-k00*cin10-k01*cin11-k02*cin21-k03*cin31;
1606     c20=cin20-k00*cin20-k01*cin21-k02*cin22-k03*cin32;
1607     c30=cin30-k00*cin30-k01*cin31-k02*cin32-k03*cin33;
1608     c40=cin40-k00*cin40-k01*cin41-k02*cin42-k03*cin43;
1609     c11=cin11-k10*cin10-k11*cin11-k12*cin21-k13*cin31;
1610     c21=cin21-k10*cin20-k11*cin21-k12*cin22-k13*cin32;
1611     c31=cin31-k10*cin30-k11*cin31-k12*cin32-k13*cin33;
1612     c41=cin41-k10*cin40-k11*cin41-k12*cin42-k13*cin43;
1613     c22=cin22-k20*cin20-k21*cin21-k22*cin22-k23*cin32;
1614     c32=cin32-k20*cin30-k21*cin31-k22*cin32-k23*cin33;
1615     c42=cin42-k20*cin40-k21*cin41-k22*cin42-k23*cin43;
1616     c33=cin33-k30*cin30-k31*cin31-k32*cin32-k33*cin33;
1617     c43=cin43-k30*cin40-k31*cin41-k32*cin42-k33*cin43;
1618     c44=cin44-k40*cin40-k41*cin41-k42*cin42-k43*cin43;
1619
1620     newTrack->PutXElements(x0,x1,x2,x3,x4); // put the new state vector
1621     newTrack->PutCElements(c00,
1622                            c10,c11,
1623                            c20,c21,c22,
1624                            c30,c31,c32,c33,
1625                            c40,c41,c42,c43,c44); // put in track the
1626                                                  // new cov matrix
1627     Double_t vmc[4][4];
1628     vmc[0][0]=v00-c00; vmc[1][0]=-c10; vmc[2][0]=-c20; vmc[3][0]=-c30;
1629     vmc[1][1]=v11-c11; vmc[2][1]=-c21; vmc[3][1]=v31-c31;
1630     vmc[2][2]=v22-c22; vmc[3][2]=v32-c32;
1631     vmc[3][3]=v33-c33;
1632     vmc[0][1]=vmc[1][0]; vmc[0][2]=vmc[2][0]; vmc[0][3]=vmc[3][0];
1633     vmc[1][2]=vmc[2][1]; vmc[1][3]=vmc[3][1];
1634     vmc[2][3]=vmc[3][2];
1635     /////////////////////// vmc matrix inversion ///////////////////////
1636     d=1.;
1637     for(k=0; k<kn; k++) {
1638         ll[k]=k;
1639         mm[k]=k;
1640         big=vmc[k][k];
1641         for(j=k; j<kn ; j++) {
1642             for (i=j; i<kn; i++) {
1643                 if(TMath::Abs(big) < TMath::Abs(vmc[i][j]) ) {
1644                     big=vmc[i][j];
1645                     ll[k]=i;
1646                     mm[k]=j;
1647                 } // end if
1648             } // end for i
1649         } // end for j
1650         //
1651         j= ll[k];
1652         if(j > k) {
1653             for(i=0; i<kn; i++) {
1654                 hold=-vmc[k][i];
1655                 vmc[k][i]=vmc[j][i];
1656                 vmc[j][i]=hold;
1657             } // end for i
1658         } // end if
1659         //
1660         i=mm[k];
1661         if(i > k ) {
1662             for(j=0; j<kn; j++) {
1663                 hold=-vmc[j][k];
1664                 vmc[j][k]=vmc[j][i];
1665                 vmc[j][i]=hold;
1666             } // end for j
1667         } // end if
1668         //
1669         if(!big) {
1670             d=0.;
1671             cout << "Singular matrix\n";
1672         } // end if
1673         for(i=0; i<kn; i++) {
1674             if(i == k) continue;
1675             vmc[i][k]=vmc[i][k]/(-big);
1676         }    // end for i
1677         //
1678         for(i=0; i<kn; i++) {
1679             hold=vmc[i][k];
1680             for(j=0; j<kn; j++) {
1681                 if(i == k || j == k) continue;
1682                 vmc[i][j]=hold*vmc[k][j]+vmc[i][j];
1683             } // end for j
1684         } // end for i
1685         //
1686         for(j=0; j<kn; j++) {
1687             if(j == k) continue;
1688             vmc[k][j]=vmc[k][j]/big;
1689         } // end for j
1690         //
1691         d=d*big;
1692         //
1693         vmc[k][k]=1./big;
1694     }  // end for k
1695     //
1696     for(k=kn-1; k>=0; k--) {
1697         i=ll[k];
1698         if(i > k) {
1699             for (j=0; j<kn; j++) {
1700                 hold=vmc[j][k];
1701                 vmc[j][k]=-vmc[j][i];
1702                 vmc[j][i]=hold;
1703             } // end for j
1704         } // end if i>k
1705         j=mm[k];
1706         if(j > k) {
1707             for (i=0; i<kn; i++) {
1708                 hold=vmc[k][i];
1709                 vmc[k][i]=-vmc[j][i];
1710                 vmc[j][i]=hold;
1711             } // end for i
1712         } // end if j>k
1713     } // end for k
1714     ////////////////////////////////////////////////////////////////////
1715     Double_t chi2=(m[0]-x0)*( vmc[0][0]*(m[0]-x0) + 2.*vmc[1][0]*(m[1]-x1) +
1716                               2.*vmc[2][0]*(m[2]-x2)+ 2.*vmc[3][0]*(m[3]-x3) )+
1717         (m[1]-x1)* ( vmc[1][1]*(m[1]-x1) + 2.*vmc[2][1]*(m[2]-x2)+
1718                      2.*vmc[3][1]*(m[3]-x3) ) +
1719         (m[2]-x2)* ( vmc[2][2]*(m[2]-x2)+ 2.*vmc[3][2]*(m[3]-x3) ) +
1720         (m[3]-x3)*vmc[3][3]*(m[3]-x3);
1721     //cout<<" chi2 kalman = "<<chi2<<"\n";  getchar();
1722     newTrack->SetChi2(newTrack->GetChi2()+chi2);
1723     //   newTrack->SetChi2(newTrack->GetChi2()+chi2pred);
1724 }