ITS/AliITSTrackerV1.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 // The purpose of this class is to permorm the ITS tracking. The
  19 // constructor has the task to inizialize some private members. The method
  20 // DoTracking is written to be called by a macro. It gets the event number,
  21 // the minimum and maximum order number of TPC tracks that are to be tracked
  22 // trough the ITS, and the file where the recpoints are registered. The
  23 // method Recursivetracking is a recursive function that performs the
  24 // tracking trough the ITS The method Intersection found the layer, ladder
  25 // and detector whre the intersection take place and caluclate the
  26 // cohordinates of this intersection. It returns an integer that is 0 if the
  27 // intersection has been found successfully. The two mwthods Kalmanfilter
  28 // and kalmanfiltervert operate the kalmanfilter without and with the vertex
  29 // imposition respectively. The authors thank Mariana Bondila to have help
  30 // them to resolve some problems.  July-2000
  31
  32 #include <Riostream.h>
  33 #include <TMath.h>
  34 #include <TBranch.h>
  35 #include <TVector.h>
  36 #include <TFile.h>
  37 #include <TRandom.h>
  38 #include <TTree.h>
  39
  40 #include "TParticle.h"
  41 #include "AliRun.h"
  42 #include "AliITSDetTypeRec.h"
  43 #include "AliITSgeomSPD.h"
  44 #include "AliITSgeomSDD.h"
  45 #include "AliITSgeomSSD.h"
  46 #include "AliITSgeom.h"
  47 #include "AliITSRecPoint.h"
  48 #include "AliKalmanTrack.h"
  49 #include "AliMagF.h"
  50 #include "AliITSTrackV1.h"
  51 #include "AliITSIOTrack.h"
  52 #include "AliITSRad.h"
  53 #include "AliTPCtracker.h"
  54 #include "AliITSTrackerV1.h"
  55 #include "AliITSPid.h"
  56 #include "AliMC.h"
  57
  58 ClassImp(AliITSTrackerV1)
  59  //______________________________________________________________________
  60 AliITSTrackerV1::AliITSTrackerV1() {
  61   //Default constructor
  62   //fITS = 0;
  63   fresult = 0;
  64   fPtref=0.;
  65   fChi2max=0.;
  66   //fepsphi=0.;
  67   //fepsz=0.;
  68   frecPoints = 0;
  69   fvettid = 0;
  70   fflagvert=0;
  71   frl = 0;
  72   Int_t ia;
  73   for(ia=0; ia<6; ia++) {
  74   fNlad[ia]=0;
  75   fNdet[ia]=0;
  76   fAvrad[ia]=0.;
  77   fDetx[ia]=0.;
  78   fDetz[ia]=0.;
  79   } // end for ia
  80   fzmin = 0;
  81   fzmax = 0;
  82   fphimin = 0;
  83   fphimax = 0;
  84   fphidet = 0;
  85   fNRecPoints=0;
  86   fRecCylR=0;
  87   fRecCylPhi=0;
  88   fRecCylZ=0;
  89   fFieldFactor=0;
  90   fDetTypeRec = 0;
  91 }
  92 //______________________________________________________________________
  93 AliITSTrackerV1::AliITSTrackerV1(Int_t evnumber, Bool_t flag) {
  94     //Origin   A. Badala' and G.S. Pappalardo:
  95     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
  96     // Class constructor. It does some initializations.
  97
  98   //PH Initialisation taken from the default constructor
  99   //fITS      = IITTSS;
 100   fresult = 0;
 101   fPtref    = 0.;
 102   fChi2max  =0.;
 103   frecPoints = 0;
 104   fvettid = 0;
 105   fflagvert = flag;
 106   frl = 0;
 107   fzmin = 0;
 108   fzmax = 0;
 109   fphimin = 0;
 110   fphimax = 0;
 111   fphidet = 0;
 112
 113   Int_t imax = 200,jmax = 450;
 114   frl       = new AliITSRad(imax,jmax);
 115
 116   //////////  gets information on geometry /////////////////////////////
 117   AliRunLoader* rl = AliRunLoader::Open("galice.root");
 118   AliITSLoader* loader = (AliITSLoader*)runLoader->GetLoader("ITSLoader");
 119   if (!loader) {
 120     Error("AliITSTrackerV1", "ITS loader not found");
 121     return;
 122   }
 123   fDetTypeRec = new AliITSDetTypeRec(loader);
 124   AliITSgeom* g1 = loader->GetITSgeom();
 125
 126   Int_t ll=1, dd=1;
 127   TVector det(9);
 128
 129   Int_t ia;
 130   for(ia=0; ia<6; ia++) {
 131     fNlad[ia]=g1->GetNladders(ia+1);
 132     fNdet[ia]=g1->GetNdetectors(ia+1);
 133     //cout<<fNlad[i]<<" "<<fNdet[i]<<"\n";
 134   } // end for ia
 135
 136     //cout<<" mean radius = ";
 137   Int_t ib;
 138   for(ib=0; ib<6; ib++) {
 139     g1->GetCenterThetaPhi(ib+1,ll,dd,det);
 140     Double_t r1=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 141     g1->GetCenterThetaPhi(ib+1,ll,dd+1,det);
 142     Double_t r2=TMath::Sqrt(det(0)*det(0)+det(1)*det(1));
 143     fAvrad[ib]=(r1+r2)/2.;
 144     //cout<<fAvrad[ib]<<" ";
 145   } // end for ib
 146     //cout<<"\n"; getchar();
 147
 148   fDetx[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDx();
 149   fDetz[0] = ((AliITSgeomSPD*)(g1->GetShape(1, ll, dd)))->GetDz();
 150
 151   fDetx[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDx();
 152   fDetz[1] = ((AliITSgeomSPD*)(g1->GetShape(2, ll, dd)))->GetDz();
 153
 154     fDetx[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDx();
 155     fDetz[2] = ((AliITSgeomSDD*)(g1->GetShape(3, ll, dd)))->GetDz();
 156
 157     fDetx[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDx();
 158     fDetz[3] = ((AliITSgeomSDD*)(g1->GetShape(4, ll, dd)))->GetDz();
 159
 160     fDetx[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDx();
 161     fDetz[4] = ((AliITSgeomSSD*)(g1->GetShape(5, ll, dd)))->GetDz();
 162
 163     fDetx[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDx();
 164     fDetz[5] = ((AliITSgeomSSD*)(g1->GetShape(6, ll, dd)))->GetDz();
 165     //cout<<"    Detx     Detz\n";
 166     //for(Int_t la=0; la<6; la++) cout<<"    "<<fDetx[la]<<"     "<<
 167     //                                 fDetz[la]<<endl;
 168     //getchar();
 169
 170     // allocate memory and define matrices fzmin, fzmax, fphimin and fphimax //
 171     Double_t epsz=1.2;
 172     Double_t epszdrift=0.05;
 173
 174     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 175     Int_t im1, im2, im2max;
 176     for(im1=0; im1<6; im1++) {
 177         im2max=fNdet[im1];
 178         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 179     } // end for im1
 180
 181     for(im1=0; im1<6; im1++) {
 182         im2max=fNdet[im1];
 183         for(im2=0; im2<im2max; im2++) {
 184             g1->GetCenterThetaPhi(im1+1,1,im2+1,det);
 185             if(im2!=0) fzmin[im1][im2]=det(2)-fDetz[im1];
 186             else
 187                 fzmin[im1][im2]=det(2)-(fDetz[im1])*epsz;
 188             if(im2!=(im2max-1)) fzmax[im1][im2]=det(2)+fDetz[im1];
 189             else
 190                 fzmax[im1][im2]=det(2)+fDetz[im1]*epsz;
 191             if(im1==2 || im1==3) {
 192                 fzmin[im1][im2]-=epszdrift;
 193                 fzmax[im1][im2]+=epszdrift;
 194             } // end if im1==2 || im1==3
 195         } // end for im2
 196     } // end for im1
 197
 198     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 199     for(im1=0;im1<6;im1++) {
 200         im2max=fNlad[im1];
 201         fphimin[im1] = new Double_t[im2max];
 202         fphimax[im1] = new Double_t[im2max];
 203     } // end for im1
 204
 205     fphidet = new Double_t*[6];
 206     for(im1=0; im1<6; im1++) {
 207         im2max=fNlad[im1];
 208         fphidet[im1] = new Double_t[im2max];
 209     } // end for im1
 210
 211         Double_t global[3],local[3];
 212     Double_t pigre=TMath::Pi();
 213     Double_t xmin,ymin,xmax,ymax;
 214
 215     for(im1=0; im1<6; im1++) {
 216         im2max=fNlad[im1];
 217         for(im2=0; im2<im2max; im2++) {
 218             Int_t idet=2;
 219             g1->GetCenterThetaPhi(im1+1,im2+1,idet,det);
 220             fphidet[im1][im2] = TMath::ATan2(Double_t(det(1)),
 221                                              Double_t(det(0)));
 222             if(fphidet[im1][im2]<0.) fphidet[im1][im2]+=2.*pigre;
 223             local[1]=local[2]=0.;
 224             local[0]= -(fDetx[im1]);
 225             if(im1==0) local[0]= (fDetx[im1]); //to take into account
 226                                                // different reference system
 227             g1->LtoG(im1+1,im2+1,idet,local,global);
 228             xmax=global[0]; ymax=global[1];
 229             local[0]= (fDetx[im1]);
 230             if(im1==0) local[0]= -(fDetx[im1]);//take into account different
 231                                                // reference system
 232             g1->LtoG(im1+1,im2+1,idet,local,global);
 233             xmin=global[0]; ymin=global[1];
 234             fphimin[im1][im2]= TMath::ATan2(ymin,xmin);
 235             if(fphimin[im1][im2]<0.) fphimin[im1][im2]+=2.*pigre;
 236             fphimax[im1][im2]= TMath::ATan2(ymax,xmax);
 237             if(fphimax[im1][im2]<0.) fphimax[im1][im2]+=2.*pigre;
 238         } // end for im2
 239     } // end for im1
 240 //////////////////////////////////////////////////////////////////////////////////////////////////////////
 241 /////////////// allocate memory and define vector fNRecPoints and matrices fRecCylR, fRecCylPhi, fRecCylZ /////////////
 242         gAlice->GetEvent(evnumber);
 243   Int_t numOfModules = g1->GetIndexMax();
 244   fRecCylR = new Double_t *[numOfModules];
 245   fRecCylPhi = new Double_t *[numOfModules];
 246   fRecCylZ = new Double_t *[numOfModules];
 247   AliITSRecPoint *recp;
 248   fNRecPoints = new Int_t[numOfModules];
 249
 250                  for(Int_t module=0; module<numOfModules; module++) {
 251                   fDetTypeRec->ResetRecPoints();
 252                   gAlice->TreeR()->GetEvent(module);
 253                   frecPoints=fDetTypeRec->RecPoints();
 254                   Int_t nRecPoints=fNRecPoints[module]=frecPoints->GetEntries();
 255                   fRecCylR[module] = new Double_t[nRecPoints];
 256                   fRecCylPhi[module] = new Double_t[nRecPoints];
 257                   fRecCylZ[module] = new  Double_t[nRecPoints];
 258                   Int_t ind;
 259                   for(ind=0; ind<fNRecPoints[module]; ind++) {
 260                     recp=(AliITSRecPoint*)frecPoints->UncheckedAt(ind);
 261                         // Float_t global[3], local[3];
 262                          Double_t global[3], local[3];
 263                local[0]=recp->GetX();
 264                local[1]=0.;
 265                local[2]= recp->GetZ();
 266                          g1->LtoG(module,local,global);
 267
 268                          Double_t r = TMath::Sqrt(global[0]*global[0]+global[1]*global[1]);                     // r hit
 269                          Double_t phi = TMath::ATan2(global[1],global[0]); if(phi<0.) phi+=2.*TMath::Pi();      // phi hit
 270                  Double_t z = global[2];                                                                // z hit
 271
 272                          fRecCylR[module][ind]=r;
 273                          fRecCylPhi[module][ind]=phi;
 274                          fRecCylZ[module][ind]=z;
 275                   }
 276                 }
 277          //}
 278   //}
 279 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 280
 281
 282     ////////// gets magnetic field factor //////////////////////////////
 283     AliMagF * fieldPointer = (AliMagF*)TGeoGlobalMagField::Instance()->GetField();
 284     fFieldFactor =  fieldPointer ? fieldPointer->SolenoidField()/10/.2 : 0;
 285    // cout<< " field factor = "<<fFieldFactor<<"\n"; getchar();
 286     delete rl;
 287
 288 }
 289 //______________________________________________________________________
 290 AliITSTrackerV1::AliITSTrackerV1(const AliITSTrackerV1 &cobj) : TObject(cobj) {
 291     // Origin  A. Badala' and G.S. Pappalardo:
 292     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 293     // copy constructor
 294
 295   //     *fITS = *cobj.fITS;
 296     *fresult = *cobj.fresult;
 297     fPtref = cobj.fPtref;
 298     fChi2max = cobj.fChi2max;
 299     **fvettid = **cobj.fvettid;
 300     fflagvert = cobj.fflagvert;
 301     Int_t imax=200,jmax=450;
 302     frl = new AliITSRad(imax,jmax);
 303     *frl = *cobj.frl;
 304     fFieldFactor = cobj.fFieldFactor;
 305     Int_t i,im1,im2,im2max;
 306     for(i=0; i<6; i++) {
 307         fNlad[i] = cobj.fNlad[i];
 308         fNdet[i] = cobj.fNdet[i];
 309         fAvrad[i] = cobj.fAvrad[i];
 310         fDetx[i] = cobj.fDetx[i];
 311         fDetz[i] = cobj.fDetz[i];
 312     } // end or i
 313     fzmin = new Double_t*[6]; fzmax = new Double_t*[6];
 314     for(im1=0; im1<6; im1++) {
 315         im2max=fNdet[im1];
 316         fzmin[im1] = new Double_t[im2max];
 317         fzmax[im1] = new Double_t[im2max];
 318     } // end for im1
 319     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 320     for(im1=0;im1<6;im1++) {
 321         im2max=fNlad[im1];
 322         fphimin[im1] = new Double_t[im2max];
 323         fphimax[im1] = new Double_t[im2max];
 324     } // end for im1
 325
 326     fphidet = new Double_t*[6];
 327     for(im1=0; im1<6; im1++) {
 328         im2max=fNlad[im1];
 329         fphidet[im1] = new Double_t[im2max];
 330     } // end for im1
 331     for(im1=0; im1<6; im1++) {
 332         im2max=fNdet[im1];
 333         for(im2=0; im2<im2max; im2++) {
 334             fzmin[im1][im2]=cobj.fzmin[im1][im2];
 335             fzmax[im1][im2]=cobj.fzmax[im1][im2];
 336         } // end for im2
 337     } // end for im1
 338     for(im1=0; im1<6; im1++) {
 339         im2max=fNlad[im1];
 340         for(im2=0; im2<im2max; im2++) {
 341             fphimin[im1][im2]=cobj.fphimin[im1][im2];
 342             fphimax[im1][im2]=cobj.fphimax[im1][im2];
 343             fphidet[im1][im2]=cobj.fphidet[im1][im2];
 344         } // end for im2
 345     } // end for im2
 346
 347
 348     AliRunLoader* rl = AliRunLoader::Open("galice.root");
 349     rl->CdGAFile();
 350     AliITSgeom* g1 = (AliITSgeom*)gDirectory->Get("AliITSgeom");
 351
 352    Int_t numOfModules = g1->GetIndexMax();
 353         /*
 354   fRecCylR = new Float_t *[numOfModules];
 355   fRecCylPhi = new Float_t *[numOfModules];
 356   fRecCylZ = new Float_t *[numOfModules];
 357   */
 358   fRecCylR = new Double_t *[numOfModules];
 359   fRecCylPhi = new Double_t *[numOfModules];
 360   fRecCylZ = new Double_t *[numOfModules];
 361   fNRecPoints = new Int_t[numOfModules];
 362                 for(Int_t module=0; module<numOfModules; module++) {
 363                   Int_t nRecPoints=fNRecPoints[module]=cobj.fNRecPoints[module];
 364                   /*
 365                   fRecCylR[module] = new Float_t[nRecPoints];
 366                   fRecCylPhi[module] = new Float_t[nRecPoints];
 367                   fRecCylZ[module] = new Float_t[nRecPoints];
 368                   */
 369                   fRecCylR[module] = new Double_t[nRecPoints];
 370                   fRecCylPhi[module] = new Double_t[nRecPoints];
 371                   fRecCylZ[module] = new Double_t[nRecPoints];
 372                   Int_t ind;
 373                   for(ind=0; ind<nRecPoints; ind++) {
 374                          fRecCylR[module][ind]=cobj.fRecCylR[module][ind];
 375                          fRecCylPhi[module][ind]=cobj.fRecCylPhi[module][ind];
 376                          fRecCylZ[module][ind]=cobj.fRecCylZ[module][ind];
 377                   }
 378                 }
 379                 delete rl;
 380
 381 }
 382 /*
 383 //______________________________________________________________________
 384 void AliITSTrackerV1::DelMatrix(Int_t numOfModules) {
 385   // cleanup of some data members
 386   for(Int_t mod=0; mod<numOfModules; mod++) {
 387     delete fRecCylR[mod];
 388          delete fRecCylPhi[mod];
 389          delete fRecCylZ[mod];
 390   }
 391     delete fRecCylR;
 392          delete fRecCylPhi;
 393          delete fRecCylZ;
 394 }
 395 */
 396 //______________________________________________________________________
 397 AliITSTrackerV1::~AliITSTrackerV1(){
 398     // Origin  A. Badala' and G.S. Pappalardo:
 399     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 400     // class destructor
 401   delete frl;
 402   delete fNRecPoints;
 403   for(Int_t i=0; i<6; i++) {
 404     delete fzmin[i];
 405          delete fzmax[i];
 406          delete fphimin[i];
 407          delete fphimax[i];
 408          delete fphidet[i];
 409   }
 410
 411   delete fzmin;
 412   delete fzmax;
 413   delete fphimin;
 414   delete fphimax;
 415   delete fphidet;
 416
 417 }
 418 //______________________________________________________________________
 419 AliITSTrackerV1 &AliITSTrackerV1::operator=(const AliITSTrackerV1 &obj) {
 420     // Origin  A. Badala' and G.S. Pappalardo:
 421     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 422     // assignement operator
 423
 424   //     *fITS = *obj.fITS;
 425     *fresult = *obj.fresult;
 426     fPtref = obj.fPtref;
 427     fChi2max = obj.fChi2max;
 428     **fvettid = **obj.fvettid;
 429     fflagvert = obj.fflagvert;
 430     Int_t imax=200,jmax=450;
 431     frl = new AliITSRad(imax,jmax);
 432     *frl = *obj.frl;
 433     fFieldFactor = obj.fFieldFactor;
 434     Int_t i;
 435     for(i=0; i<6; i++) {
 436         fNlad[i] = obj.fNlad[i];
 437         fNdet[i] = obj.fNdet[i];
 438         fAvrad[i] = obj.fAvrad[i];
 439         fDetx[i] = obj.fDetx[i];
 440         fDetz[i] = obj.fDetz[i];
 441     } // end for i
 442     fzmin = new Double_t*[6];
 443     fzmax = new Double_t*[6];
 444     Int_t im1, im2, im2max;
 445     for(im1=0; im1<6; im1++) {
 446         im2max=fNdet[im1];
 447         fzmin[im1] = new Double_t[im2max]; fzmax[im1] = new Double_t[im2max];
 448     } // end for im1
 449     fphimin = new Double_t*[6]; fphimax = new Double_t*[6];
 450     for(im1=0;im1<6;im1++) {
 451         im2max=fNlad[im1];
 452         fphimin[im1] = new Double_t[im2max];
 453         fphimax[im1] = new Double_t[im2max];
 454     } // end for im1
 455
 456     fphidet = new Double_t*[6];
 457     for(im1=0; im1<6; im1++) {
 458         im2max=fNlad[im1];
 459         fphidet[im1] = new Double_t[im2max];
 460     } // end for im1
 461     for(im1=0; im1<6; im1++) {
 462         im2max=fNdet[im1];
 463         for(im2=0; im2<im2max; im2++) {
 464             fzmin[im1][im2]=obj.fzmin[im1][im2];
 465             fzmax[im1][im2]=obj.fzmax[im1][im2];
 466         } // end for im2
 467     } // end for im1
 468     for(im1=0; im1<6; im1++) {
 469         im2max=fNlad[im1];
 470         for(im2=0; im2<im2max; im2++) {
 471             fphimin[im1][im2]=obj.fphimin[im1][im2];
 472             fphimax[im1][im2]=obj.fphimax[im1][im2];
 473             fphidet[im1][im2]=obj.fphidet[im1][im2];
 474         } // end for im2
 475     } // end for im1
 476
 477     AliRunLoader* rl = AliRunLoader::Open("galice.root");
 478     rl->CdGAFile();
 479     AliITSgeom* g1 = (AliITSgeom*)gDirectory->Get("AliITSgeom");
 480     //  AliITSgeom *g1 = fITS->GetITSgeom();
 481    Int_t numOfModules = g1->GetIndexMax();
 482   fRecCylR = new Double_t *[numOfModules];
 483   fRecCylPhi = new Double_t *[numOfModules];
 484   fRecCylZ = new Double_t *[numOfModules];
 485   fNRecPoints = new Int_t[numOfModules];
 486           for(Int_t module=0; module<numOfModules; module++) {
 487                   Int_t nRecPoints=fNRecPoints[module]=obj.fNRecPoints[module];
 488                   fRecCylR[module] = new Double_t[nRecPoints];
 489                   fRecCylPhi[module] = new Double_t[nRecPoints];
 490                   fRecCylZ[module] = new Double_t[nRecPoints];
 491                   Int_t ind;
 492                   for(ind=0; ind<nRecPoints; ind++) {
 493                          fRecCylR[module][ind]=obj.fRecCylR[module][ind];
 494                          fRecCylPhi[module][ind]=obj.fRecCylPhi[module][ind];
 495                          fRecCylZ[module][ind]=obj.fRecCylZ[module][ind];
 496                   }
 497                 }
 498
 499
 500           delete rl;
 501     return *this;
 502 }
 503 //______________________________________________________________________
 504 void AliITSTrackerV1::DoTracking(Int_t evNumber,Int_t minTr,Int_t maxTr,
 505                                  TFile *file, Bool_t realmass) {
 506     // Origin   A. Badala' and G.S. Pappalardo:
 507     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 508     // The method needs the event number, the minimum and maximum order
 509     // number of TPC tracks that
 510     // are to be tracked trough the ITS, and the file where the recpoints
 511     // are registered.
 512     // The method can be called by a macro. It preforms the tracking for
 513     // all good TPC tracks
 514
 515     printf("begin DoTracking - file %p\n",(void*)file);
 516
 517     gAlice->GetEvent(evNumber);  //modificato per gestire hbt
 518
 519     TFile *cf=TFile::Open("AliTPCclusters.root");
 520     AliTPCParam *digp= (AliTPCParam*)cf->Get("75x40_100x60_150x60");
 521     if (!digp) { cerr<<"TPC parameters have not been found !\n"; getchar();}
 522
 523     cf->cd();
 524     AliRunLoader* rl = AliRunLoader::Open("galice.root");
 525     AliITSLoader* itsl = (AliITSLoader*)rl->GetLoader("ITSLoader");
 526     TString foldname(itsl->GetEventFolder()->GetName());
 527     //TString foldname(fITS->GetLoader()->GetEventFolder()->GetName());
 528     delete rl;
 529     printf("This method is not converted to the NewIO !\n");  //I.B.
 530     return; //I.B.
 531     AliTPCtracker *tracker = new AliTPCtracker(digp);            //I.B.
 532     //PH    tracker->SetEventNumber(evNumber);                           //I.B.
 533
 534     // Load clusters
 535     printf("This method is not converted to the NewIO !\n");  //I.B.
 536     return; //I.B.
 537     tracker->LoadClusters(0);       //I.B.
 538
 539     // Load tracks
 540     TFile *tf=TFile::Open("AliTPCtracksSorted.root");
 541     if (!tf->IsOpen()) {
 542         cerr<<"Can't open AliTPCtracksSorted.root !\n";
 543         return ;
 544     } // end if
 545     TObjArray tracks(200000);
 546     char tname[100];
 547     sprintf(tname,"TreeT_TPC_%d",evNumber);
 548
 549     TTree *tracktree=(TTree*)tf->Get(tname);
 550     if (!tracktree) {cerr<<"Can't get a tree with TPC tracks !\n";}
 551     TBranch *tbranch=tracktree->GetBranch("tracks");
 552     Int_t nentr=(Int_t)tracktree->GetEntries();
 553     Int_t kk;
 554
 555     AliITSRecPoint *recp;    // oggi
 556         AliTPCtrack *ioTrackTPC=0;
 557     for (kk=0; kk<nentr; kk++) {
 558         ioTrackTPC=new AliTPCtrack;
 559         tbranch->SetAddress(&ioTrackTPC);
 560         tracktree->GetEvent(kk);
 561         tracker->CookLabel(ioTrackTPC,0.1);
 562         tracks.AddLast(ioTrackTPC);
 563     } // end for kk
 564     delete tracker;
 565     tf->Close();
 566
 567     Int_t nt = tracks.GetEntriesFast();
 568     cerr<<"Number of found tracks "<<nt<<endl;
 569
 570     TVector vec(5);
 571     TTree *tr=gAlice->TreeR();
 572     Int_t nent=(Int_t)tr->GetEntries();
 573     frecPoints = fDetTypeRec->RecPoints();
 574
 575     Int_t numbpoints;
 576     Int_t totalpoints=0;
 577     Int_t *np = new Int_t[nent];
 578     fvettid = new Int_t* [nent];
 579     Int_t mod;
 580
 581     for (mod=0; mod<nent; mod++) {
 582         fvettid[mod]=0;
 583         fDetTypeRec->ResetRecPoints();
 584         gAlice->TreeR()->GetEvent(mod);
 585         numbpoints = frecPoints->GetEntries();
 586         totalpoints+=numbpoints;
 587         np[mod] = numbpoints;
 588         //cout<<" mod = "<<mod<<"   numbpoints = "<<numbpoints<<"\n";getchar();
 589         fvettid[mod] = new Int_t[numbpoints];
 590         Int_t ii;
 591         for (ii=0;ii<numbpoints; ii++) *(fvettid[mod]+ii)=0;
 592     } // end for mod
 593
 594     AliTPCtrack *track=0;
 595
 596     if(minTr < 0) {minTr = 0; maxTr = nt-1;}
 597
 598     TVector vgeant(3);
 599
 600     TTree tracktree1("TreeT","Tree with ITS tracks");
 601     AliITSIOTrack *ioTrack=0;
 602         AliITSPid *pid=new AliITSPid(1000);  // oggi
 603
 604     tracktree1.Branch("ITStracks","AliITSIOTrack",&ioTrack,32000,0);
 605
 606     TDatabasePDG * db = new TDatabasePDG;
 607
 608     Int_t j;
 609     for (j=minTr; j<=maxTr; j++) {
 610         track=(AliTPCtrack*)tracks.UncheckedAt(j);
 611         if (!track) continue;
 612
 613         ///   mass definition ////////////////////////
 614     Double_t mass=0.13956995;
 615          Int_t pcode=211;  // a pion by default
 616
 617          if(realmass) {
 618         if(TMath::Abs(pcode)<20443) mass=db->GetParticle(pcode)->Mass();
 619          }
 620          else {
 621                  mass = track->GetMass();
 622 //               cout << "Mass = " << mass << endl;
 623          }
 624
 625
 626
 627          //   new propagation to the end of TPC
 628     Double_t xk=80.;
 629    // track->PropagateTo(xk,0.,0.); //Ne if it's still there   //attenzione funziona solo se modifica in TPC
 630         // Double_t xk=77.415;
 631          track->PropagateTo(xk, 28.94, 1.204e-3);
 632     xk-=0.005;
 633     track->PropagateTo(xk, 44.77,1.71); //Tedlar
 634     xk-=0.02;
 635     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 636     xk-=2.0;
 637     track->PropagateTo(xk, 41.28, 0.029);//Nomex
 638     xk-=0.02;
 639     track->PropagateTo(xk, 44.86, 1.45);   //Kevlar
 640     xk-=0.005;
 641     track->PropagateTo(xk, 44.77, 1.71); //Tedlar
 642
 643     xk=61.;
 644    // track->PropagateTo(xk,0.,0.); //C02
 645          track->PropagateTo(xk,36.2,1.98e-3); //C02        //attenzione funziona solo se modifica in TPC
 646
 647     xk -=0.005;
 648     track->PropagateTo(xk, 24.01, 2.7);    //Al
 649     xk -=0.005;
 650     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 651     xk -=0.02;
 652     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 653     xk -=0.5;
 654     track->PropagateTo(xk, 41.28, 0.029);  //Nomex
 655     xk -=0.02;
 656     track->PropagateTo(xk, 44.86, 1.45);    //Kevlar
 657     xk -=0.005;
 658     track->PropagateTo(xk, 44.77, 1.71);  //Tedlar
 659     xk -=0.005;
 660     track->PropagateTo(xk, 24.01, 2.7);    //Al
 661
 662         ////////////////////////////////////////////////////////////////////////////////////////////////////////
 663         //AliITSTrackV1 trackITS(*track);
 664         AliITSTrackV1 trackITS(*track, fFieldFactor);
 665         //cout<<" fFieldFactor = "<<fFieldFactor<<"\n";
 666         trackITS.PutMass(mass);   //new to add mass to track
 667         if(fresult){ delete fresult; fresult=0;}
 668         fresult = new AliITSTrackV1(trackITS);
 669
 670         AliITSTrackV1 primaryTrack(trackITS);
 671         vgeant=(*fresult).GetVertex();
 672
 673         // Definition of dv and zv for vertex constraint
 674         Double_t sigmaDv=0.0050;  Double_t sigmaZv=0.010;
 675         //Double_t sigmaDv=0.0015;  Double_t sigmaZv=0.0015;
 676         Double_t uniform= gRandom->Uniform();
 677         Double_t signdv;
 678         if(uniform<=0.5) signdv=-1.;
 679         else
 680             signdv=1.;
 681
 682         Double_t vr=TMath::Sqrt(vgeant(0)*vgeant(0)+ vgeant(1)*vgeant(1));
 683         Double_t dv=gRandom->Gaus(signdv*vr,(Float_t)sigmaDv);
 684         Double_t zv=gRandom->Gaus(vgeant(2),(Float_t)sigmaZv);
 685         //cout<<" Dv e Zv = "<<dv<<" "<<zv<<"\n";
 686         trackITS.SetDv(dv);
 687         trackITS.SetZv(zv);
 688         trackITS.SetsigmaDv(sigmaDv);
 689         trackITS.SetsigmaZv(sigmaZv);
 690         (*fresult).SetDv(dv);
 691         (*fresult).SetZv(zv);
 692         (*fresult).SetsigmaDv(sigmaDv);
 693         (*fresult).SetsigmaZv(sigmaZv);
 694         primaryTrack.SetDv(dv);
 695         primaryTrack.SetZv(zv);
 696         primaryTrack.SetsigmaDv(sigmaDv);
 697         primaryTrack.SetsigmaZv(sigmaZv);
 698         primaryTrack.PrimaryTrack();
 699         TVector  d2=primaryTrack.Getd2();
 700         TVector  tgl2=primaryTrack.Gettgl2();
 701         TVector  dtgl=primaryTrack.Getdtgl();
 702         trackITS.Setd2(d2); trackITS.Settgl2(tgl2);
 703         trackITS.Setdtgl(dtgl);
 704         (*fresult).Setd2(d2); (*fresult).Settgl2(tgl2);
 705         (*fresult).Setdtgl(dtgl);
 706         /*
 707           trackITS.SetVertex(vertex); trackITS.SetErrorVertex(ervertex);
 708           (*result).SetVertex(vertex);   (*result).SetErrorVertex(ervertex);
 709         */
 710         TList *list= new TList();
 711
 712         list->AddLast(&trackITS);
 713
 714         fPtref=TMath::Abs( (trackITS).GetPt() );
 715         //cout<<" fPtref = " <<fPtref<<"\n";
 716         if(fPtref>1.0) fChi2max=40.;
 717         if(fPtref<=1.0) fChi2max=20.;
 718         if(fPtref<0.4 ) fChi2max=100.;
 719         if(fPtref<0.2 ) fChi2max=40.;
 720         // if(fPtref<0.4 ) fChi2max=30.;
 721         // if(fPtref<0.2 ) fChi2max=20.;
 722         //if(fPtref<0.2 ) fChi2max=10.;
 723         //if(fPtref<0.1 ) fChi2max=5.;
 724         //cout << "\n Pt = " << fPtref <<"\n";  //stampa
 725         RecursiveTracking(list);
 726         list->Delete();
 727         delete list;
 728
 729         Int_t itot=-1;
 730         TVector vecTotLabRef(18);
 731         Int_t lay, k;
 732         for(lay=5; lay>=0; lay--) {
 733             TVector vecLabRef(3);
 734             vecLabRef=(*fresult).GetLabTrack(lay);
 735             Float_t clustZ=(*fresult).GetZclusterTrack( lay);
 736             for(k=0; k<3; k++){
 737                 Int_t lpp=(Int_t)vecLabRef(k);
 738                 if(lpp>=0) {
 739                     TParticle *p=(TParticle*) gAlice->GetMCApp()->Particle(lpp);
 740                     Int_t pcode=p->GetPdgCode();
 741                     if(pcode==11) vecLabRef(k)=p->GetFirstMother();
 742                 } // end if
 743                 itot++; vecTotLabRef(itot)=vecLabRef(k);
 744                 if(vecLabRef(k)==0. && clustZ == -1.) vecTotLabRef(itot) =-3.;
 745             } // end for k
 746         } // end for lay
 747         Long_t labref;
 748         Int_t freq;
 749         (*fresult).Search(vecTotLabRef, labref, freq);
 750
 751         //if(freq < 6) labref=-labref;        // cinque - sei
 752         if(freq < 5) labref=-labref;        // cinque - sei
 753         (*fresult).SetLabel(labref);
 754
 755         // cout<<" progressive track number = "<<j<<"\r";
 756         // cout<<j<<"\r";
 757         Int_t numOfCluster=(*fresult).GetNumClust();
 758         //cout<<" progressive track number = "<<j<<"\n";    // stampa
 759         Long_t labITS=(*fresult).GetLabel();
 760         //cout << " ITS track label = " << labITS << "\n";      // stampa
 761         Int_t lab=track->GetLabel();
 762         //cout << " TPC track label = " << lab <<"\n";      // stampa
 763         //propagation to vertex
 764
 765         Double_t rbeam=3.;
 766         if((*fresult).DoNotCross(rbeam)) continue;  //no intersection with beampipe
 767         (*fresult).Propagation(rbeam);
 768         Double_t c00,c10,c11,c20,c21,c22,c30,c31,c32,c33,c40,c41,c42,c43,c44;
 769         (*fresult).GetCElements(c00,
 770                                 c10,c11,
 771                                 c20,c21,c22,
 772                                 c30,c31,c32,c33,
 773                                 c40,c41,c42,c43,c44);
 774
 775         Double_t pt=TMath::Abs((*fresult).GetPt());
 776         Double_t dr=(*fresult).GetD();
 777         Double_t z=(*fresult).GetZ();
 778         Double_t tgl=(*fresult).GetTgl();
 779         Double_t c=(*fresult).GetC();
 780         Double_t cy=c/2.;
 781         Double_t dz=z-(tgl/cy)*TMath::ASin((*fresult).Arga(rbeam));
 782         dz-=vgeant(2);
 783         // cout<<" dr e dz alla fine = "<<dr<<" "<<dz<<"\n"; getchar();
 784         Double_t phi=(*fresult).Getphi();
 785         Double_t phivertex = phi - TMath::ASin((*fresult).ArgA(rbeam));
 786         Double_t duepi=2.*TMath::Pi();
 787         if(phivertex>duepi) phivertex-=duepi;
 788         if(phivertex<0.) phivertex+=duepi;
 789         /////////////////////////////////////////////////////////////
 790         Int_t idmodule,idpoint;
 791         if(numOfCluster >=5)  {            // cinque - sei
 792             //if(numOfCluster ==6)  {            // cinque - sei
 793             AliITSIOTrack outTrack;
 794             ioTrack=&outTrack;
 795             ioTrack->SetStatePhi(phi);
 796             ioTrack->SetStateZ(z);
 797             ioTrack->SetStateD(dr);
 798             ioTrack->SetStateTgl(tgl);
 799             ioTrack->SetStateC(c);
 800             Double_t radius=(*fresult).Getrtrack();
 801             ioTrack->SetRadius(radius);
 802             Int_t charge;
 803             if(c>0.) charge=-1;  else charge=1;
 804             ioTrack->SetCharge(charge);
 805                 Double_t trackmass=(*fresult).GetMass();         // oggi
 806                 ioTrack->SetMass(trackmass);                     // oggi
 807             ioTrack->SetCovMatrix(c00,
 808                                   c10,c11,
 809                                   c20,c21,c22,
 810                                   c30,c31,c32,c33,
 811                                   c40,c41,c42,c43,c44);
 812             Double_t px=pt*TMath::Cos(phivertex);
 813             Double_t py=pt*TMath::Sin(phivertex);
 814             Double_t pz=pt*tgl;
 815             Double_t xtrack=dr*TMath::Sin(phivertex);
 816             Double_t ytrack=dr*TMath::Cos(phivertex);
 817             Double_t ztrack=dz+vgeant(2);
 818             ioTrack->SetPx(px);
 819             ioTrack->SetPy(py);
 820             ioTrack->SetPz(pz);
 821             ioTrack->SetX(xtrack);
 822             ioTrack->SetY(ytrack);
 823             ioTrack->SetZ(ztrack);
 824             ioTrack->SetLabel(labITS);
 825             ioTrack->SetTPCLabel(lab);
 826                  ioTrack->SetDz(dz);
 827             Int_t il;
 828             /*
 829                 for(il=0;il<6; il++){
 830                 ioTrack->SetIdPoint(il,(*fresult).GetIdPoint(il));
 831                 ioTrack->SetIdModule(il,(*fresult).GetIdModule(il));
 832             } // end for il
 833             */
 834             //tracktree1.Fill();
 835                 Float_t q[4]={-1.,-1.,-1.,-1.};
 836             Float_t  globaldedx=0.;
 837             for (il=0;il<6;il++) {
 838                 idpoint=(*fresult).GetIdPoint(il);
 839                 idmodule=(*fresult).GetIdModule(il);
 840                 if(idmodule>0.) *(fvettid[idmodule]+idpoint)=1;
 841
 842                 ioTrack->SetIdPoint(il,idpoint);
 843                 ioTrack->SetIdModule(il,idmodule);
 844                 ////  for q definition
 845                 if(il>1){
 846                   if(idmodule>0.){
 847                     fDetTypeRec->ResetRecPoints();
 848                     gAlice->TreeR()->GetEvent(idmodule);
 849                     recp=(AliITSRecPoint*)frecPoints->UncheckedAt(idpoint);
 850                     q[il-2]=recp->GetQ()*(*fresult).Getfcor(il-2);
 851                   }
 852                 }
 853             } // end for il
 854                 q[0]/=280.; q[1]/=280.;
 855             q[2]/=38.; q[3]/=38.;
 856
 857  // cout<<" q prima = "<<q[0]<<" "<<q[1]<<" "<<q[2]<<" "<<q[3]<<"\n"; getchar();
 858
 859      Int_t swap;
 860   do{
 861     swap=0;
 862     for (il=0; il<3; il++) {
 863       if (q[il]<=q[il+1]) continue;
 864       Float_t tmp=q[il];
 865       q[il]=q[il+1]; q[il+1]=tmp;
 866       swap++;
 867     }
 868   } while(swap);
 869
 870
 871   // cout<<" q dopo = "<<q[0]<<" "<<q[1]<<" "<<q[2]<<" "<<q[3]<<"\n"; getchar();
 872
 873     if(q[0]<0.) {
 874       q[0]=q[1];
 875       q[1]=q[2];
 876       q[2]=q[3];
 877       q[3]=-1.;
 878     }
 879
 880   // cout<<" q  dopo if = "<<q[0]<<" "<<q[1]<<" "<<q[2]<<" "<<q[3]<<"\n"; getchar();
 881
 882     globaldedx=(q[0]+q[1])/2.;
 883
 884    // if(q[3]> 0.) globaldedx=(q[0]+q[1]+q[2]+q[3])/4.;
 885    //      else    globaldedx=(q[0]+q[1]+q[2])/3.;
 886
 887     ioTrack->SetdEdx(globaldedx);
 888     ioTrack->SetPid(pid->GetPcode(ioTrack));
 889
 890             tracktree1.Fill();
 891         } // end if on numOfCluster
 892         //gObjectTable->Print();    // stampa memoria
 893     }  //  end for (int j=minTr; j<=maxTr; j++)
 894     delete db;
 895     static Bool_t first=kTRUE;
 896     static TFile *tfile;
 897     if(first) {
 898         tfile=new TFile("itstracks.root","RECREATE");
 899         //cout<<"I have opened itstracks.root file "<<endl;
 900     } // end if
 901     first=kFALSE;
 902     tfile->cd();
 903     tfile->ls();
 904     char hname[30];
 905     sprintf(hname,"TreeT%d",evNumber);
 906         cout << "Number of saved ITS tracks " << tracktree1.GetEntries() << endl;
 907     tracktree1.Write(hname);
 908
 909     TTree *fAli=gAlice->TreeK();
 910     TFile *fileAli=0;
 911     if (fAli) fileAli =fAli->GetCurrentFile();
 912     fileAli->cd();
 913     ////////////////////////////////////////////////////////////////////
 914
 915     printf("delete vectors\n");
 916     if(np) delete [] np;
 917     if(fvettid) delete [] fvettid;
 918     if(fresult) {delete fresult; fresult=0;}
 919 }
 920 //______________________________________________________________________
 921 void AliITSTrackerV1::RecursiveTracking(TList *trackITSlist) {
 922     //   This function perform the recursive tracking in ITS detectors
 923     // reference is a pointer to the final best track
 924     // Origin  A. Badala' and G.S. Pappalardo:
 925     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
 926     // The authors thank Mariana Bondila to have help them to resolve some
 927     // problems.  July-2000
 928
 929     //Rlayer[0]=4.; Rlayer[1]=7.;  Rlayer[2]=14.9;
 930     // Rlayer[3]=23.8;  Rlayer[4]=39.1;  Rlayer[5]=43.6; //vecchio
 931
 932     //////////////////////
 933     Float_t sigmaphil[6], sigmazl[6];
 934     sigmaphil[0]=1.44e-6/(fAvrad[0]*fAvrad[0]);
 935     sigmaphil[1]=1.44e-6/(fAvrad[1]*fAvrad[1]);
 936     sigmaphil[2]=1.444e-5/(fAvrad[2]*fAvrad[2]);
 937     sigmaphil[3]=1.444e-5/(fAvrad[3]*fAvrad[3]);
 938     sigmaphil[4]=4e-6/(fAvrad[4]*fAvrad[4]);
 939     sigmaphil[5]=4e-6/(fAvrad[5]*fAvrad[5]);
 940     sigmazl[0]=1e-2;
 941     sigmazl[1]=1e-2;
 942     sigmazl[2]=7.84e-4;
 943     sigmazl[3]=7.84e-4;
 944     sigmazl[4]=0.6889;
 945     sigmazl[5]=0.6889;
 946     ///////////////////////////////////////////////////////////
 947     Int_t index;
 948     AliRunLoader* rl = AliRunLoader::Open("galice.root");
 949     rl->CdGAFile();
 950     AliITSgeom* g1 = (AliITSgeom*)gDirectory->Get("AliITSgeom");
 951
 952     AliITSRecPoint *recp;
 953     for(index =0; index<trackITSlist->GetSize(); index++) {
 954         AliITSTrackV1 *trackITS = (AliITSTrackV1 *) trackITSlist->At(index);
 955         if((*trackITS).GetLayer()==7) fresult->SetChi2(10.223e140);
 956         // cout <<" Layer inizio = "<<(*trackITS).GetLayer()<<"\n";
 957         //  cout<<"fvtrack =" <<"\n";
 958         //  cout << (*trackITS)(0) << " "<<(*trackITS)(1)<<" "
 959         //       <<(*trackITS)(2)<<" "<<(*trackITS)(3)<<" "
 960         //       <<(*trackITS)(4)<<"\n";
 961         //  cout<< " rtrack = "<<(*trackITS).Getrtrack()<<"\n";
 962         //  cout<< " Pt = "<<(*trackITS).GetPt()<<"\n";
 963         //  getchar();
 964         Double_t chi2Now, chi2Ref;
 965         Float_t numClustRef = fresult->GetNumClust();
 966         if((*trackITS).GetLayer()==1 ) {
 967             chi2Now = trackITS->GetChi2();
 968             Float_t numClustNow = trackITS->GetNumClust();
 969             if(trackITS->GetNumClust())
 970                 chi2Now /= (Double_t)trackITS->GetNumClust();
 971             chi2Ref = fresult->GetChi2();
 972             if(fresult->GetNumClust())
 973                 chi2Ref /= (Double_t)fresult->GetNumClust();
 974             //cout<<" chi2Now and chi2Ref = "<<chi2Now<<" "<<chi2Ref<<"\n";
 975             if( numClustNow > numClustRef ) {*fresult = *trackITS;}
 976             if((numClustNow == numClustRef )&&
 977                (chi2Now < chi2Ref))  {
 978                 *fresult = *trackITS;
 979             } // end if
 980             continue;
 981         } // end if
 982
 983         if(trackITS->Getfnoclust()>=2)  continue;
 984         Float_t numClustNow = trackITS->GetNumClust();
 985         if(numClustNow) {
 986             chi2Now = trackITS->GetChi2();
 987
 988             if(numClustNow<numClustRef && chi2Now>fresult->GetChi2()) continue;
 989             //cout<<" chi2Now =  "<<chi2Now<<"\n";
 990
 991             chi2Now/=numClustNow;
 992             if(fPtref > 1.0 && chi2Now > 30.) continue;
 993             if((fPtref >= 0.6 && fPtref<=1.0) && chi2Now > 40.) continue;
 994             // if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 40.) continue;
 995             // if(fPtref <= 0.2 && chi2Now > 8.) continue;
 996             if((fPtref <= 0.6 && fPtref>0.2)&& chi2Now > 30.) continue;
 997             if(fPtref <= 0.2 && chi2Now > 7.) continue;
 998             /////////////////////////////
 999         } // end if
1000
1001         Int_t layerInit = (*trackITS).GetLayer();
1002         Int_t layernew = layerInit - 2;// -1 for new layer, -1 for matrix index
1003         TList listoftrack;
1004         Int_t ladp, ladm, detp,detm,ladinters,detinters;
1005         Int_t layerfin=layerInit-1;
1006         // cout<<"Prima di intersection \n";
1007         Int_t  outinters=Intersection(*trackITS,layerfin,ladinters,detinters);
1008         // cout<<" outinters = "<<outinters<<"\n";
1009         //  cout<<" Layer ladder detector intersection ="
1010         //      <<layerfin<<" "<<ladinters<<" "<<detinters<<"\n";
1011         //  cout << " phiinters zinters = "<<(*trackITS)(0)
1012         //       << " "<<(*trackITS)(1)<<"\n"; getchar();
1013         if(outinters==-1) continue;
1014         Int_t flaghit=0;
1015         (*trackITS).SetLayer(layerfin);  // oggi
1016         (*trackITS).Setfcor();           // oggi
1017         if(outinters==0){
1018             TVector toucLad(9), toucDet(9);
1019             Int_t lycur=layerfin;
1020             ladp=ladinters+1;
1021             ladm=ladinters-1;
1022             if(ladm <= 0) ladm=fNlad[layerfin-1];
1023             if(ladp > fNlad[layerfin-1]) ladp=1;
1024             detp=detinters+1;
1025             detm=detinters-1;
1026             Int_t idetot=1;
1027             /*
1028               toucLad(0)=ladinters; toucLad(1)=ladm; toucLad(2)=ladp;
1029               toucLad(3)=ladinters; toucLad(4)=ladm; toucLad(5)=ladp;
1030               toucLad(6)=ladinters; toucLad(7)=ladm; toucLad(8)=ladp;
1031               toucDet(0)=detinters; toucDet(1)=detinters; toucDet(2)=detinters;
1032               if(detm > 0 && detp <= fNdet[layerfin-1]) {
1033                    idetot=9;
1034                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1035                    toucDet(6)=detp; toucDet(7)=detp; toucDet(8)=detp;
1036               } // end if
1037               if(detm > 0 && detp > fNdet[layerfin-1]) {
1038                    idetot=6;
1039                    toucDet(3)=detm; toucDet(4)=detm; toucDet(5)=detm;
1040              } // end if
1041              if(detm <= 0 && detp <= fNdet[layerfin-1]) {
1042                   idetot=6;
1043                   toucDet(3)=detp; toucDet(4)=detp; toucDet(5)=detp;
1044              } // end if
1045             */
1046             Float_t epsphi=5.0, epsz=5.0;
1047             if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1048             // new definition of idetot e toucLad e toucDet to be
1049             // transformed in a method
1050             // these values could be modified
1051             Float_t pigre=TMath::Pi();
1052             Float_t rangephi=5., rangez=5.;
1053             if(layerfin==1 || layerfin ==2){
1054                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1055                                                 (*trackITS).GetSigmaphi());
1056                 rangez = 40.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1057                                               (*trackITS).GetSigmaZ());
1058             } // end if
1059             if(layerfin==3 || layerfin ==4){
1060                 //rangephi=30.*fepsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1061                 //                                 (*trackITS).GetSigmaphi());
1062                 //rangez = 40.*fepsz*TMath::Sqrt(sigmazl[layerfin-1]+
1063                 //                               (*trackITS).GetSigmaZ());
1064                 rangephi=40.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1065                                                 (*trackITS).GetSigmaphi());
1066                 rangez = 50.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1067                                               (*trackITS).GetSigmaZ());
1068             } // end if
1069             if(layerfin==5 || layerfin ==6){
1070                 rangephi=20.*epsphi*TMath::Sqrt(sigmaphil[layerfin-1]+
1071                                                 (*trackITS).GetSigmaphi());
1072                 rangez =5.*epsz*TMath::Sqrt(sigmazl[layerfin-1]+
1073                                             (*trackITS).GetSigmaZ());
1074             } // end if
1075             Float_t phinters, zinters;
1076             phinters=(*trackITS).Getphi();
1077             zinters=(*trackITS).GetZ();
1078             Float_t distz = 0.0;
1079             Float_t phicm, phicp, distphim, distphip;
1080             phicm=phinters;
1081                  if(phinters>fphimax[layerfin-1][ladm-1]) phicm=phinters-2*pigre;  //corretto il 20-11-2001
1082                  distphim=TMath::Abs(phicm-fphimax[layerfin-1][ladm-1]);  //corretto il 20-11-2001
1083             phicp=phinters;
1084                  //cout<<" fNlad[layerfin-1] e ladp = "<<fNlad[layerfin-1]<<" "<<ladp<<endl;
1085                  if(phinters>fphimin[layerfin-1][ladp-1]) phicp=phinters-2.*pigre;   //corretto il 20-11-2001
1086                  distphip=TMath::Abs(phicp-fphimin[layerfin-1][ladp-1]);      //corretto il 20-11-2001
1087             Int_t flagzmin=0;
1088             Int_t flagzmax=0;
1089             idetot=1;
1090             toucLad(0)=ladinters; toucDet(0)=detinters;
1091             if(detm>0) distz=TMath::Abs(zinters-fzmax[layerfin-1][detm-1]);
1092             if(detm>0 && rangez>=distz){
1093                 flagzmin=1;
1094                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detm;
1095                 if(rangephi>=distphim){
1096                     idetot++;
1097                     toucLad(idetot-1)=ladm;
1098                     toucDet(idetot-1)=detinters;
1099                     idetot++;
1100                     toucLad(idetot-1)=ladm;
1101                     toucDet(idetot-1)=detm;
1102                 } // end if
1103                 if(rangephi>=distphip){
1104                     idetot++;
1105                     toucLad(idetot-1)=ladp;
1106                     toucDet(idetot-1)=detinters;
1107                     idetot++;
1108                     toucLad(idetot-1)=ladp;
1109                     toucDet(idetot-1)=detm;
1110                 } // end if
1111             }  //end detm>0....
1112             if(detp<=fNdet[layerfin-1])
1113                 distz=TMath::Abs(zinters-fzmin[layerfin-1][detp-1]);
1114             if(detp<=fNdet[layerfin-1] && rangez>=distz){
1115                 flagzmax=1;
1116                 idetot++; toucLad(idetot-1)=ladinters; toucDet(idetot-1)=detp;
1117                 if(rangephi>=distphim){
1118                     idetot++; toucLad(idetot-1)=ladm; toucDet(idetot-1)=detp;
1119                     if(flagzmin == 0) {
1120                         idetot++;
1121                         toucLad(idetot-1)=ladm;
1122                         toucDet(idetot-1)=detinters;
1123                     } // end if
1124                 } // end if
1125                 if(rangephi>=distphip){
1126                     idetot++;
1127                     toucLad(idetot-1)=ladp;
1128                     toucDet(idetot-1)=detp;
1129                     if(flagzmin == 0) {
1130                         idetot++;
1131                         toucLad(idetot-1)=ladp;
1132                         toucDet(idetot-1)=detinters;
1133                     } // end if
1134                 } // end if
1135             }  //end detm<fNdet[.......
1136
1137             if(flagzmin == 0 && flagzmax==0){
1138                 if(rangephi>=distphim){
1139                     idetot++;
1140                     toucLad(idetot-1)=ladm;
1141                     toucDet(idetot-1)=detinters;
1142                 } // end if
1143                 if(rangephi>=distphip){
1144                     idetot++;
1145                     toucLad(idetot-1)=ladp;
1146                     toucDet(idetot-1)=detinters;
1147                 } // end if
1148             } // end if
1149             ////////////////////////////////////////////////////////////
1150             Int_t iriv;
1151             for (iriv=0; iriv<idetot; iriv++) {  //for on detectors
1152                 ///////////////////////////////////////////////////////
1153                 /*** Rec points sorted by module *****/
1154                 /**************************************/
1155                 Int_t indexmod;
1156                 indexmod = g1->GetModuleIndex(lycur,(Int_t)toucLad(iriv),
1157                                               (Int_t)toucDet(iriv));
1158                 fDetTypeRec->ResetRecPoints();
1159                 gAlice->TreeR()->GetEvent(indexmod);
1160                 Int_t npoints=frecPoints->GetEntries();
1161
1162                 Int_t indnew;
1163                 for(indnew=0; indnew<npoints; indnew++){
1164                     if (*(fvettid[indexmod]+indnew)==0)
1165                         recp =(AliITSRecPoint*)frecPoints->UncheckedAt(indnew);
1166                     else
1167                         continue;
1168                     TVector cluster(3),vecclust(9);
1169                     //vecclust(6)=vecclust(7)=vecclust(8)=-1.;
1170                     Double_t sigma[2];
1171   // now vecclust is with cylindrical cohordinates
1172                vecclust(0)=(Float_t)fRecCylR[indexmod][indnew];
1173                vecclust(1)=(Float_t)fRecCylPhi[indexmod][indnew];
1174                vecclust(2)=(Float_t)fRecCylZ[indexmod][indnew];
1175                     vecclust(3) = (Float_t)recp->fTracks[0];
1176                     vecclust(4) = (Float_t)indnew;
1177                     vecclust(5) = (Float_t)indexmod;
1178                     vecclust(6) = (Float_t)recp->fTracks[0];
1179                     vecclust(7) = (Float_t)recp->fTracks[1];
1180                     vecclust(8) = (Float_t)recp->fTracks[2];
1181                     sigma[0] = (Double_t)  recp->GetSigmaX2();
1182                     sigma[1] = (Double_t) recp->GetSigmaZ2();
1183
1184                          cluster(0)=fRecCylR[indexmod][indnew];
1185           cluster(1)=fRecCylPhi[indexmod][indnew];
1186                          cluster(2)=fRecCylZ[indexmod][indnew];
1187
1188                     // cout<<" layer = "<<play<<"\n";
1189                     // cout<<" cluster prima = "<<vecclust(0)<<" "
1190                     //     <<vecclust(1)<<" "
1191                     //     <<vecclust(2)<<"\n"; getchar();
1192
1193                     Float_t sigmatotphi, sigmatotz;
1194                     // Float_t epsphi=5.0, epsz=5.0;
1195                     //if(fPtref<0.2) {epsphi=3.; epsz=3.;}
1196                     Double_t rTrack=(*trackITS).Getrtrack();
1197                     Double_t sigmaphi=sigma[0]/(rTrack*rTrack);
1198                     sigmatotphi=epsphi*TMath::Sqrt(sigmaphi +
1199                                                    (*trackITS).GetSigmaphi());
1200                     sigmatotz=epsz*TMath::Sqrt(sigma[1] +
1201                                                (*trackITS).GetSigmaZ());
1202                     //cout<<"cluster e sigmatotphi e track = "<<cluster(0)
1203                     //    <<" "<<cluster(1)<<" "<<sigmatotphi<<" "
1204                     //    <<vecclust(3)<<"\n";
1205                     //if(vecclust(3)==481) getchar();
1206                     if(cluster(1)<6. && (*trackITS).Getphi()>6.)
1207                         cluster(1)=cluster(1)+(2.*TMath::Pi());
1208                     if(cluster(1)>6. && (*trackITS).Getphi()<6.)
1209                         cluster(1)=cluster(1)-(2.*TMath::Pi());
1210                     if(TMath::Abs(cluster(1)-(*trackITS).Getphi())>sigmatotphi)
1211                         continue;
1212                     // cout<<" supero sigmaphi \n";
1213                     AliITSTrackV1 *newTrack = new AliITSTrackV1((*trackITS));
1214                     //(*newTrack).SetLayer((*trackITS).GetLayer()-1);
1215                     if (TMath::Abs(rTrack-cluster(0))/rTrack>1e-6)
1216                         (*newTrack).Correct(Double_t(cluster(0)));
1217                     //cout<<" cluster(2) e(*newTrack).GetZ()="<<cluster(2)<<" "
1218                     //    << (*newTrack).GetZ()<<"\n";
1219                     if(TMath::Abs(cluster(2)-(*newTrack).GetZ()) > sigmatotz){
1220                         delete newTrack;
1221                         continue;
1222                     } // end if
1223                     Double_t sigmanew[2];
1224                     sigmanew[0]= sigmaphi;
1225                     sigmanew[1]=sigma[1];
1226                     Double_t m[2];
1227                     m[0]=cluster(1);
1228                     m[1]=cluster(2);
1229                     //  Double_t chi2pred=newTrack->GetPredChi2(m,sigmanew);
1230                     // cout<<" chi2pred = "<<chi2pred<<"\n";
1231                     // if(chi2pred>fChi2max) continue; //aggiunto il 30-7-2001
1232                     if(iriv == 0) flaghit=1;
1233                     (*newTrack).AddMS();  // add the multiple scattering
1234                                              //matrix to the covariance matrix
1235                     (*newTrack).AddEL(1.,0);
1236
1237                     if(fflagvert){
1238                         KalmanFilterVert(newTrack,cluster,sigmanew);
1239                         //KalmanFilterVert(newTrack,cluster,sigmanew,chi2pred);
1240                     }else{
1241                         KalmanFilter(newTrack,cluster,sigmanew);
1242                     } // end if
1243                     (*newTrack).PutCluster(layernew, vecclust);
1244                     newTrack->AddClustInTrack();
1245                     listoftrack.AddLast(newTrack);
1246                 }   // end for indnew
1247             }  // end of for on detectors (iriv)
1248         }//end if(outinters==0)
1249
1250         if(flaghit==0 || outinters==-2) {
1251             AliITSTrackV1 *newTrack = new AliITSTrackV1(*trackITS);
1252             (*newTrack).Setfnoclust();
1253             //(*newTrack).SetLayer((*trackITS).GetLayer()-1);
1254             (*newTrack).AddMS();  // add the multiple scattering matrix
1255                                      // to the covariance matrix
1256             (*newTrack).AddEL(1.,0);
1257             listoftrack.AddLast(newTrack);
1258         } // end if
1259
1260         //gObjectTable->Print();   // stampa memoria
1261
1262         RecursiveTracking(&listoftrack);
1263         listoftrack.Delete();
1264     } // end of for on tracks (index)
1265
1266     //gObjectTable->Print();   // stampa memoria
1267      delete rl;
1268
1269 }
1270 //______________________________________________________________________
1271 Int_t AliITSTrackerV1::Intersection(AliITSTrackV1 &track,Int_t layer,
1272                                     Int_t &ladder,Int_t &detector) {
1273     // Origin  A. Badala' and G.S. Pappalardo
1274     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1275     // Found the intersection and the detector
1276
1277     Double_t rk=fAvrad[layer-1];
1278     if(track.DoNotCross(rk)){ /*cout<< " Do not cross \n";*/ return -1;}
1279     track.Propagation(rk);
1280     Double_t zinters=track.GetZ();
1281     Double_t phinters=track.Getphi();
1282     //cout<<"zinters = "<<zinters<<"  phinters = "<<phinters<<"\n";
1283
1284     TVector det(9);
1285     TVector listDet(2);
1286     TVector distZCenter(2);
1287
1288     Int_t iz=0;
1289     Int_t iD;
1290     for(iD = 1; iD<= fNdet[layer-1]; iD++) {
1291         if(zinters > fzmin[layer-1][iD-1] && zinters <= fzmax[layer-1][iD-1]) {
1292             if(iz>1) {
1293                 cout<< " Errore su iz in Intersection \n";
1294                 getchar();
1295             }else {
1296                 listDet(iz)= iD; distZCenter(iz)=TMath::Abs(zinters-det(2));
1297                 iz++;
1298             } // end if
1299         } // end if
1300     } // end for iD
1301
1302     if(iz==0) {/* cout<< " No detector along Z \n";*/ return -2;}
1303     detector=Int_t (listDet(0));
1304     if(iz>1 && (distZCenter(0)>distZCenter(1)))   detector=Int_t (listDet(1));
1305
1306     TVector listLad(2);
1307     TVector distPhiCenter(2);
1308     Int_t ip=0;
1309     Double_t pigre=TMath::Pi();
1310     Int_t iLd;
1311     for(iLd = 1; iLd<= fNlad[layer-1]; iLd++) {
1312         Double_t phimin=fphimin[layer-1][iLd-1];
1313         Double_t phimax=fphimax[layer-1][iLd-1];
1314         Double_t phidet=fphidet[layer-1][iLd-1];
1315         Double_t phiconfr=phinters;
1316         if(phimin>phimax) {
1317             //if(phimin <5.5) {cout<<" Error in Intersection for phi \n";
1318             // getchar();}
1319             phimin-=(2.*pigre);
1320             if(phinters>(1.5*pigre)) phiconfr=phinters-(2.*pigre);
1321             if(phidet>(1.5*pigre)) phidet-=(2.*pigre);
1322         } // end if
1323         if(phiconfr>phimin && phiconfr<= phimax) {
1324             if(ip>1) {
1325                 cout<< " Errore su ip in Intersection \n"; getchar();
1326             }else  {
1327                 listLad(ip)= iLd;
1328                 distPhiCenter(ip)=TMath::Abs(phiconfr-phidet); ip++;
1329             } // end if
1330         } // end if
1331     } // end for iLd
1332     if(ip==0) { cout<< " No detector along phi \n"; getchar();}
1333     ladder=Int_t (listLad(0));
1334     if(ip>1 && (distPhiCenter(0)>distPhiCenter(1)))  ladder=Int_t (listLad(1));
1335     return 0;
1336 }
1337 //______________________________________________________________________
1338 void AliITSTrackerV1::KalmanFilter(AliITSTrackV1 *newTrack,TVector &cluster,
1339                                    Double_t sigma[2]){
1340     //Origin  A. Badala' and G.S. Pappalardo:
1341     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1342     // Kalman filter without vertex constraint
1343     ////// Evaluation of the measurement vector ////////////////////////
1344     Double_t m[2];
1345     Double_t rk,phik,zk;
1346     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1347     m[0]=phik;    m[1]=zk;
1348     //////////////////////// Evaluation of the error matrix V  /////////
1349     Double_t v00=sigma[0];
1350     Double_t v11=sigma[1];
1351     ////////////////////////////////////////////////////////////////////
1352     Double_t cin00,cin10,cin20,cin30,cin40,cin11,cin21,cin31,cin41,cin22,
1353              cin32,cin42,cin33,cin43,cin44;
1354
1355     newTrack->GetCElements(cin00,
1356                            cin10,cin11,
1357                            cin20,cin21,cin22,
1358                            cin30,cin31,cin32,cin33,
1359                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1360     Double_t rold00=cin00+v00;
1361     Double_t rold10=cin10;
1362     Double_t rold11=cin11+v11;
1363     ////////////////////// R matrix inversion  /////////////////////////
1364     Double_t det=rold00*rold11-rold10*rold10;
1365     Double_t r00=rold11/det;
1366     Double_t r10=-rold10/det;
1367     Double_t r11=rold00/det;
1368     ////////////////////////////////////////////////////////////////////
1369     Double_t k00=cin00*r00+cin10*r10;
1370     Double_t k01=cin00*r10+cin10*r11;
1371     Double_t k10=cin10*r00+cin11*r10;
1372     Double_t k11=cin10*r10+cin11*r11;
1373     Double_t k20=cin20*r00+cin21*r10;
1374     Double_t k21=cin20*r10+cin21*r11;
1375     Double_t k30=cin30*r00+cin31*r10;
1376     Double_t k31=cin30*r10+cin31*r11;
1377     Double_t k40=cin40*r00+cin41*r10;
1378     Double_t k41=cin40*r10+cin41*r11;
1379     Double_t x0,x1,x2,x3,x4;
1380     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1381     Double_t savex0=x0, savex1=x1;
1382     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1);
1383     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1);
1384     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1);
1385     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1);
1386     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1);
1387     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1388     c00=cin00-k00*cin00-k01*cin10;
1389     c10=cin10-k00*cin10-k01*cin11;
1390     c20=cin20-k00*cin20-k01*cin21;
1391     c30=cin30-k00*cin30-k01*cin31;
1392     c40=cin40-k00*cin40-k01*cin41;
1393     c11=cin11-k10*cin10-k11*cin11;
1394     c21=cin21-k10*cin20-k11*cin21;
1395     c31=cin31-k10*cin30-k11*cin31;
1396     c41=cin41-k10*cin40-k11*cin41;
1397     c22=cin22-k20*cin20-k21*cin21;
1398     c32=cin32-k20*cin30-k21*cin31;
1399     c42=cin42-k20*cin40-k21*cin41;
1400     c33=cin33-k30*cin30-k31*cin31;
1401     c43=cin43-k30*cin40-k31*cin41;
1402     c44=cin44-k40*cin40-k41*cin41;
1403     newTrack->PutXElements(x0,x1,x2,x3,x4);  // put the new state vector
1404     newTrack->PutCElements(c00,
1405                            c10,c11,
1406                            c20,c21,c22,
1407                            c30,c31,c32,c33,
1408                            c40,c41,c42,c43,c44); // put in track the
1409                                                  // new cov matrix
1410     Double_t vmcold00=v00-c00;
1411     Double_t vmcold10=-c10;
1412     Double_t vmcold11=v11-c11;
1413     ////////////////////// Matrix vmc inversion  ///////////////////////
1414     det=vmcold00*vmcold11-vmcold10*vmcold10;
1415     Double_t vmc00=vmcold11/det;
1416     Double_t vmc10=-vmcold10/det;
1417     Double_t vmc11=vmcold00/det;
1418     ////////////////////////////////////////////////////////////////////
1419   Double_t chi2=(m[0]-x0)*( vmc00*(m[0]-x0) + 2.*vmc10*(m[1]-x1) ) +
1420                 (m[1]-x1)*vmc11*(m[1]-x1);
1421   newTrack->SetChi2(newTrack->GetChi2()+chi2);
1422 }
1423 //----------------------------------------------------------------------
1424 //void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1425 //                                       TVector &cluster,Double_t sigma[2]){
1426 void AliITSTrackerV1::KalmanFilterVert(AliITSTrackV1 *newTrack,
1427                                        TVector &cluster,Double_t sigma[2]
1428                                        /*, Double_t chi2pred*/){
1429     //Origin  A. Badala' and G.S. Pappalardo:
1430     // e-mail Angela.Badala@ct.infn.it, Giuseppe.S.Pappalardo@ct.infn.it
1431     // Kalman filter with vertex constraint
1432     ///////////////////// Evaluation of the measurement vector m ////////
1433     Double_t m[4];
1434     Double_t rk,phik,zk;
1435     rk=cluster(0);   phik=cluster(1);  zk=cluster(2);
1436     m[0]=phik;    m[1]=zk;
1437     Double_t cc=(*newTrack).GetC();
1438     Double_t zv=(*newTrack).GetZv();
1439     Double_t dv=(*newTrack).GetDv();
1440     Double_t cy=cc/2.;
1441     Double_t tgl= (zk-zv)*cy/TMath::ASin(cy*rk);
1442     m[2]=dv;    m[3]=tgl;
1443     /////////////////////// Evaluation of the error matrix V  //////////
1444     Int_t layer=newTrack->GetLayer();
1445     Double_t v00=sigma[0];
1446     Double_t v11=sigma[1];
1447     Double_t v31=sigma[1]/rk;
1448     Double_t sigmaDv=newTrack->GetsigmaDv();
1449     Double_t v22=sigmaDv*sigmaDv  + newTrack->Getd2(layer-1);
1450     Double_t v32=newTrack->Getdtgl(layer-1);
1451     Double_t sigmaZv=newTrack->GetsigmaZv();
1452     Double_t v33=(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+newTrack->Gettgl2(layer-1);
1453     //////////////////////////////////////////////////////////////////
1454     Double_t cin00,cin10,cin11,cin20,cin21,cin22,
1455              cin30,cin31,cin32,cin33,cin40,cin41,cin42,cin43,cin44;
1456     newTrack->GetCElements(cin00,
1457                            cin10,cin11,
1458                            cin20,cin21,cin22,
1459                            cin30,cin31,cin32,cin33,
1460                            cin40,cin41,cin42,cin43,cin44); //get C matrix
1461     Double_t r[4][4];
1462     r[0][0]=cin00+v00;
1463     r[1][0]=cin10;
1464     r[2][0]=cin20;
1465     r[3][0]=cin30;
1466     r[1][1]=cin11+v11;
1467     r[2][1]=cin21;
1468     r[3][1]=cin31+sigma[1]/rk;
1469     r[2][2]=cin22+sigmaDv*sigmaDv+newTrack->Getd2(layer-1);
1470     r[3][2]=cin32+newTrack->Getdtgl(layer-1);
1471     r[3][3]=cin33+(sigma[1]+sigmaZv*sigmaZv)/(rk*rk)+
1472                                     newTrack->Gettgl2(layer-1);
1473     r[0][1]=r[1][0]; r[0][2]=r[2][0]; r[0][3]=r[3][0];
1474     r[1][2]=r[2][1]; r[1][3]=r[3][1]; r[2][3]=r[3][2];
1475     /////////////////////  Matrix R inversion //////////////////////////
1476     const Int_t kn=4;
1477     Double_t big, hold;
1478     Double_t d=1.;
1479     Int_t ll[kn],mm[kn];
1480     Int_t i,j,k;
1481
1482     for(k=0; k<kn; k++) {
1483         ll[k]=k;
1484         mm[k]=k;
1485         big=r[k][k];
1486         for(j=k; j<kn ; j++) {
1487             for (i=j; i<kn; i++) {
1488                 if(TMath::Abs(big) < TMath::Abs(r[i][j]) ) {
1489                     big=r[i][j];
1490                     ll[k]=i;
1491                     mm[k]=j;
1492                 } // end if
1493             } // end for i
1494         } // end for j
1495         //
1496         j= ll[k];
1497         if(j > k) {
1498             for(i=0; i<kn; i++) {
1499                 hold=-r[k][i];
1500                 r[k][i]=r[j][i];
1501                 r[j][i]=hold;
1502             } // end for i
1503         }// end if
1504         //
1505         i=mm[k];
1506         if(i > k ) {
1507             for(j=0; j<kn; j++) {
1508                 hold=-r[j][k];
1509                 r[j][k]=r[j][i];
1510                 r[j][i]=hold;
1511             } // end for j
1512         } // end if
1513         //
1514         if(!big) {
1515             d=0.;
1516             cout << "Singular matrix\n";
1517         } // end if
1518         for(i=0; i<kn; i++) {
1519             if(i == k) { continue; }
1520             r[i][k]=r[i][k]/(-big);
1521         } // end for i
1522         //
1523         for(i=0; i<kn; i++) {
1524             hold=r[i][k];
1525             for(j=0; j<kn; j++) {
1526                 if(i == k || j == k) continue;
1527                 r[i][j]=hold*r[k][j]+r[i][j];
1528             } // end for j
1529         } // end of ri
1530         //
1531         for(j=0; j<kn; j++) {
1532             if(j == k) continue;
1533             r[k][j]=r[k][j]/big;
1534         } // end for j
1535         //
1536         d=d*big;
1537         //
1538         r[k][k]=1./big;
1539     } // end for k
1540     //
1541     for(k=kn-1; k>=0; k--) {
1542         i=ll[k];
1543         if(i > k) {
1544             for (j=0; j<kn; j++) {
1545                 hold=r[j][k];
1546                 r[j][k]=-r[j][i];
1547                 r[j][i]=hold;
1548             } // end for j
1549         } // end if i
1550         j=mm[k];
1551         if(j > k) {
1552             for (i=0; i<kn; i++) {
1553                 hold=r[k][i];
1554                 r[k][i]=-r[j][i];
1555                 r[j][i]=hold;
1556             } // end for i
1557         } // end if
1558     } // end for k
1559     ////////////////////////////////////////////////////////////////////
1560     Double_t k00=cin00*r[0][0]+cin10*r[1][0]+cin20*r[2][0]+cin30*r[3][0];
1561     Double_t k01=cin00*r[1][0]+cin10*r[1][1]+cin20*r[2][1]+cin30*r[3][1];
1562     Double_t k02=cin00*r[2][0]+cin10*r[2][1]+cin20*r[2][2]+cin30*r[3][2];
1563     Double_t k03=cin00*r[3][0]+cin10*r[3][1]+cin20*r[3][2]+cin30*r[3][3];
1564     Double_t k10=cin10*r[0][0]+cin11*r[1][0]+cin21*r[2][0]+cin31*r[3][0];
1565     Double_t k11=cin10*r[1][0]+cin11*r[1][1]+cin21*r[2][1]+cin31*r[3][1];
1566     Double_t k12=cin10*r[2][0]+cin11*r[2][1]+cin21*r[2][2]+cin31*r[3][2];
1567     Double_t k13=cin10*r[3][0]+cin11*r[3][1]+cin21*r[3][2]+cin31*r[3][3];
1568     Double_t k20=cin20*r[0][0]+cin21*r[1][0]+cin22*r[2][0]+cin32*r[3][0];
1569     Double_t k21=cin20*r[1][0]+cin21*r[1][1]+cin22*r[2][1]+cin32*r[3][1];
1570     Double_t k22=cin20*r[2][0]+cin21*r[2][1]+cin22*r[2][2]+cin32*r[3][2];
1571     Double_t k23=cin20*r[3][0]+cin21*r[3][1]+cin22*r[3][2]+cin32*r[3][3];
1572     Double_t k30=cin30*r[0][0]+cin31*r[1][0]+cin32*r[2][0]+cin33*r[3][0];
1573     Double_t k31=cin30*r[1][0]+cin31*r[1][1]+cin32*r[2][1]+cin33*r[3][1];
1574     Double_t k32=cin30*r[2][0]+cin31*r[2][1]+cin32*r[2][2]+cin33*r[3][2];
1575     Double_t k33=cin30*r[3][0]+cin31*r[3][1]+cin32*r[3][2]+cin33*r[3][3];
1576     Double_t k40=cin40*r[0][0]+cin41*r[1][0]+cin42*r[2][0]+cin43*r[3][0];
1577     Double_t k41=cin40*r[1][0]+cin41*r[1][1]+cin42*r[2][1]+cin43*r[3][1];
1578     Double_t k42=cin40*r[2][0]+cin41*r[2][1]+cin42*r[2][2]+cin43*r[3][2];
1579     Double_t k43=cin40*r[3][0]+cin41*r[3][1]+cin42*r[3][2]+cin43*r[3][3];
1580
1581     Double_t x0,x1,x2,x3,x4;
1582     newTrack->GetXElements(x0,x1,x2,x3,x4);     // get the state vector
1583     Double_t savex0=x0, savex1=x1, savex2=x2, savex3=x3;
1584     x0+=k00*(m[0]-savex0)+k01*(m[1]-savex1)+k02*(m[2]-savex2)+
1585         k03*(m[3]-savex3);
1586     x1+=k10*(m[0]-savex0)+k11*(m[1]-savex1)+k12*(m[2]-savex2)+
1587         k13*(m[3]-savex3);
1588     x2+=k20*(m[0]-savex0)+k21*(m[1]-savex1)+k22*(m[2]-savex2)+
1589         k23*(m[3]-savex3);
1590     x3+=k30*(m[0]-savex0)+k31*(m[1]-savex1)+k32*(m[2]-savex2)+
1591         k33*(m[3]-savex3);
1592     x4+=k40*(m[0]-savex0)+k41*(m[1]-savex1)+k42*(m[2]-savex2)+
1593         k43*(m[3]-savex3);
1594     Double_t c00,c10,c20,c30,c40,c11,c21,c31,c41,c22,c32,c42,c33,c43,c44;
1595     c00=cin00-k00*cin00-k01*cin10-k02*cin20-k03*cin30;
1596     c10=cin10-k00*cin10-k01*cin11-k02*cin21-k03*cin31;
1597     c20=cin20-k00*cin20-k01*cin21-k02*cin22-k03*cin32;
1598     c30=cin30-k00*cin30-k01*cin31-k02*cin32-k03*cin33;
1599     c40=cin40-k00*cin40-k01*cin41-k02*cin42-k03*cin43;
1600     c11=cin11-k10*cin10-k11*cin11-k12*cin21-k13*cin31;
1601     c21=cin21-k10*cin20-k11*cin21-k12*cin22-k13*cin32;
1602     c31=cin31-k10*cin30-k11*cin31-k12*cin32-k13*cin33;
1603     c41=cin41-k10*cin40-k11*cin41-k12*cin42-k13*cin43;
1604     c22=cin22-k20*cin20-k21*cin21-k22*cin22-k23*cin32;
1605     c32=cin32-k20*cin30-k21*cin31-k22*cin32-k23*cin33;
1606     c42=cin42-k20*cin40-k21*cin41-k22*cin42-k23*cin43;
1607     c33=cin33-k30*cin30-k31*cin31-k32*cin32-k33*cin33;
1608     c43=cin43-k30*cin40-k31*cin41-k32*cin42-k33*cin43;
1609     c44=cin44-k40*cin40-k41*cin41-k42*cin42-k43*cin43;
1610
1611     newTrack->PutXElements(x0,x1,x2,x3,x4); // put the new state vector
1612     newTrack->PutCElements(c00,
1613                            c10,c11,
1614                            c20,c21,c22,
1615                            c30,c31,c32,c33,
1616                            c40,c41,c42,c43,c44); // put in track the
1617                                                  // new cov matrix
1618     Double_t vmc[4][4];
1619     vmc[0][0]=v00-c00; vmc[1][0]=-c10; vmc[2][0]=-c20; vmc[3][0]=-c30;
1620     vmc[1][1]=v11-c11; vmc[2][1]=-c21; vmc[3][1]=v31-c31;
1621     vmc[2][2]=v22-c22; vmc[3][2]=v32-c32;
1622     vmc[3][3]=v33-c33;
1623     vmc[0][1]=vmc[1][0]; vmc[0][2]=vmc[2][0]; vmc[0][3]=vmc[3][0];
1624     vmc[1][2]=vmc[2][1]; vmc[1][3]=vmc[3][1];
1625     vmc[2][3]=vmc[3][2];
1626     /////////////////////// vmc matrix inversion ///////////////////////
1627     d=1.;
1628     for(k=0; k<kn; k++) {
1629         ll[k]=k;
1630         mm[k]=k;
1631         big=vmc[k][k];
1632         for(j=k; j<kn ; j++) {
1633             for (i=j; i<kn; i++) {
1634                 if(TMath::Abs(big) < TMath::Abs(vmc[i][j]) ) {
1635                     big=vmc[i][j];
1636                     ll[k]=i;
1637                     mm[k]=j;
1638                 } // end if
1639             } // end for i
1640         } // end for j
1641         //
1642         j= ll[k];
1643         if(j > k) {
1644             for(i=0; i<kn; i++) {
1645                 hold=-vmc[k][i];
1646                 vmc[k][i]=vmc[j][i];
1647                 vmc[j][i]=hold;
1648             } // end for i
1649         } // end if
1650         //
1651         i=mm[k];
1652         if(i > k ) {
1653             for(j=0; j<kn; j++) {
1654                 hold=-vmc[j][k];
1655                 vmc[j][k]=vmc[j][i];
1656                 vmc[j][i]=hold;
1657             } // end for j
1658         } // end if
1659         //
1660         if(!big) {
1661             d=0.;
1662             cout << "Singular matrix\n";
1663         } // end if
1664         for(i=0; i<kn; i++) {
1665             if(i == k) continue;
1666             vmc[i][k]=vmc[i][k]/(-big);
1667         }    // end for i
1668         //
1669         for(i=0; i<kn; i++) {
1670             hold=vmc[i][k];
1671             for(j=0; j<kn; j++) {
1672                 if(i == k || j == k) continue;
1673                 vmc[i][j]=hold*vmc[k][j]+vmc[i][j];
1674             } // end for j
1675         } // end for i
1676         //
1677         for(j=0; j<kn; j++) {
1678             if(j == k) continue;
1679             vmc[k][j]=vmc[k][j]/big;
1680         } // end for j
1681         //
1682         d=d*big;
1683         //
1684         vmc[k][k]=1./big;
1685     }  // end for k
1686     //
1687     for(k=kn-1; k>=0; k--) {
1688         i=ll[k];
1689         if(i > k) {
1690             for (j=0; j<kn; j++) {
1691                 hold=vmc[j][k];
1692                 vmc[j][k]=-vmc[j][i];
1693                 vmc[j][i]=hold;
1694             } // end for j
1695         } // end if i>k
1696         j=mm[k];
1697         if(j > k) {
1698             for (i=0; i<kn; i++) {
1699                 hold=vmc[k][i];
1700                 vmc[k][i]=-vmc[j][i];
1701                 vmc[j][i]=hold;
1702             } // end for i
1703         } // end if j>k
1704     } // end for k
1705     ////////////////////////////////////////////////////////////////////
1706     Double_t chi2=(m[0]-x0)*( vmc[0][0]*(m[0]-x0) + 2.*vmc[1][0]*(m[1]-x1) +
1707                               2.*vmc[2][0]*(m[2]-x2)+ 2.*vmc[3][0]*(m[3]-x3) )+
1708         (m[1]-x1)* ( vmc[1][1]*(m[1]-x1) + 2.*vmc[2][1]*(m[2]-x2)+
1709                      2.*vmc[3][1]*(m[3]-x3) ) +
1710         (m[2]-x2)* ( vmc[2][2]*(m[2]-x2)+ 2.*vmc[3][2]*(m[3]-x3) ) +
1711         (m[3]-x3)*vmc[3][3]*(m[3]-x3);
1712     //cout<<" chi2 kalman = "<<chi2<<"\n";  getchar();
1713     newTrack->SetChi2(newTrack->GetChi2()+chi2);
1714     //   newTrack->SetChi2(newTrack->GetChi2()+chi2pred);
1715 }
1716