]> git.uio.no Git - u/mrichter/AliRoot.git/blobdiff - ITS/AliITStrackerSA.cxx
Small optimizations
[u/mrichter/AliRoot.git] / ITS / AliITStrackerSA.cxx
index 787a576434c21f6c709b92b878367668ec1d8cfe..4305191a7570eb82b970adf7f7265ea9ae0864c3 100644 (file)
 #include <TObjArray.h>
 #include <TTree.h>
 
-#include "AliESD.h"
+#include "AliESDEvent.h"
 #include "AliESDVertex.h"
 #include "AliESDtrack.h"
 #include "AliITSVertexer.h"
 #include "AliITSclusterTable.h"
 #include "AliITSRecPoint.h"
-#include "AliITSgeom.h"
+#include "AliITSgeomTGeo.h"
 #include "AliITStrackSA.h"
 #include "AliITStrackerSA.h"
 #include "AliRun.h"
 ClassImp(AliITStrackerSA)
 
 //____________________________________________________________________________
-AliITStrackerSA::AliITStrackerSA():AliITStrackerMI(){
+AliITStrackerSA::AliITStrackerSA():AliITStrackerMI(),
+fPhiEstimate(0),
+fITSStandAlone(0),
+fLambdac(0),
+fPhic(0),
+fCoef1(0),
+fCoef2(0),
+fCoef3(0),
+fNloop(0),
+fPhiWin(0),
+fLambdaWin(0),
+fVert(0),
+fVertexer(0),
+fListOfTracks(0),
+fITSclusters(0),
+fSixPoints(0),
+fOuterStartLayer(0),
+fCluLayer(0),
+fCluCoord(0){
   // Default constructor
   Init();
  
 }
 //____________________________________________________________________________
-AliITStrackerSA::AliITStrackerSA(AliITSgeom *geom):AliITStrackerMI(geom) 
+AliITStrackerSA::AliITStrackerSA(const Char_t *geom):AliITStrackerMI(0),
+fPhiEstimate(0),
+fITSStandAlone(0),
+fLambdac(0),
+fPhic(0),
+fCoef1(0),
+fCoef2(0),
+fCoef3(0),
+fNloop(0),
+fPhiWin(0),
+fLambdaWin(0),
+fVert(0),
+fVertexer(0),
+fListOfTracks(0),
+fITSclusters(0),
+fSixPoints(0),
+fOuterStartLayer(0),
+fCluLayer(0),
+fCluCoord(0) 
 {
   // Standard constructor (Vertex is known and passed to this obj.)
+  if (geom) {
+    AliWarning("\"geom\" is actually a dummy argument !");
+  }
+
   Init();
   fVert = 0;
-  fGeom = geom;
  
 }
 
 //____________________________________________________________________________
-AliITStrackerSA::AliITStrackerSA(AliITSgeom *geom, AliESDVertex *vert):AliITStrackerMI(geom) 
+AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliESDVertex *vert):AliITStrackerMI(0),
+fPhiEstimate(0),
+fITSStandAlone(0),
+fLambdac(0),
+fPhic(0),
+fCoef1(0),
+fCoef2(0),
+fCoef3(0),
+fNloop(0),
+fPhiWin(0),
+fLambdaWin(0),
+fVert(vert),
+fVertexer(0),
+fListOfTracks(0),
+fITSclusters(0),
+fSixPoints(0),
+fOuterStartLayer(0),
+fCluLayer(0),
+fCluCoord(0)
 {
   // Standard constructor (Vertex is known and passed to this obj.)
+  if (geom) {
+    AliWarning("\"geom\" is actually a dummy argument !");
+  }
   Init();
-  fVert = vert;
-  fGeom = geom;
  
 }
 
 //____________________________________________________________________________
-AliITStrackerSA::AliITStrackerSA(AliITSgeom *geom, AliITSVertexer *vertexer):AliITStrackerMI(geom) 
+AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliITSVertexer *vertexer):AliITStrackerMI(0),
+fPhiEstimate(0),
+fITSStandAlone(0),
+fLambdac(0),
+fPhic(0),
+fCoef1(0),
+fCoef2(0),
+fCoef3(0),
+fNloop(0),
+fPhiWin(0),
+fLambdaWin(0),
+fVert(),
+fVertexer(vertexer),
+fListOfTracks(0),
+fITSclusters(0),
+fSixPoints(0),
+fOuterStartLayer(0),
+fCluLayer(0),
+fCluCoord(0)
 {
   // Standard constructor (Vertex is unknown - vertexer is passed to this obj)
+  if (geom) {
+    AliWarning("\"geom\" is actually a dummy argument !");
+  }
   Init();
   fVertexer = vertexer;
-  fGeom = geom;
  
 }
 
 //____________________________________________________________________________
-AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA& tracker):AliITStrackerMI(){
+AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA& tracker):AliITStrackerMI(),
+fPhiEstimate(tracker.fPhiEstimate),
+fITSStandAlone(tracker.fITSStandAlone),
+fLambdac(tracker.fLambdac),
+fPhic(tracker.fPhic),
+fCoef1(tracker.fCoef1),
+fCoef2(tracker.fCoef2),
+fCoef3(tracker.fCoef3),
+fNloop(tracker.fNloop),
+fPhiWin(tracker.fPhiWin),
+fLambdaWin(tracker.fLambdaWin),
+fVert(tracker.fVert),
+fVertexer(tracker.fVertexer),
+fListOfTracks(tracker.fListOfTracks),
+fITSclusters(tracker.fITSclusters),
+fSixPoints(tracker.fSixPoints),
+fOuterStartLayer(tracker.fOuterStartLayer),
+fCluLayer(tracker.fCluLayer),
+fCluCoord(tracker.fCluCoord) {
   // Copy constructor
-  fPhiEstimate = tracker.fPhiEstimate;
   for(Int_t i=0;i<2;i++){
     fPoint1[i]=tracker.fPoint1[i];
     fPoint2[i]=tracker.fPoint2[i];
     fPoint3[i]=tracker.fPoint3[i];
     fPointc[i]=tracker.fPointc[i];
   }
-  fLambdac = tracker.fLambdac;
-  fPhic = tracker.fPhic;
-  fCoef1 = tracker.fCoef1;
-  fCoef2 = tracker.fCoef2;
-  fCoef3 = tracker.fCoef3;
-  fNloop = tracker.fNloop;
-  fPhiWin = tracker.fPhiWin;
-  fLambdaWin = tracker.fLambdaWin;
   if(tracker.fVertexer && tracker.fVert){
     fVert = new AliESDVertex(*tracker.fVert);
   }
   else {
     fVert = tracker.fVert;
   }
-  fVertexer = tracker.fVertexer;
-  fGeom = tracker.fGeom;
-  fListOfTracks = tracker.fListOfTracks;
-  for(Int_t i=0;i<fGeom->GetNlayers();i++){
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
     fCluLayer[i] = tracker.fCluLayer[i];
     fCluCoord[i] = tracker.fCluCoord[i];
   } 
 }
 //______________________________________________________________________
-AliITStrackerSA& AliITStrackerSA::operator=(const AliITStrackerSA& /*source*/){
-    // Assignment operator. This is a function which is not allowed to be
-    // done.
-    Error("operator=","Assignment operator not allowed\n");
-    return *this; 
+AliITStrackerSA& AliITStrackerSA::operator=(const AliITStrackerSA& source){
+    // Assignment operator. 
+  this->~AliITStrackerSA();
+  new(this) AliITStrackerSA(source);
+  return *this;
 }
 
 //____________________________________________________________________________
@@ -132,8 +217,9 @@ AliITStrackerSA::~AliITStrackerSA(){
   if(fPhiWin)delete []fPhiWin;
   if(fLambdaWin)delete []fLambdaWin;
   fListOfTracks->Delete();
+  delete fListOfTracks;
   if(fCluLayer){
-    for(Int_t i=0;i<fGeom->GetNlayers();i++){
+    for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
       if(fCluLayer[i]){
        fCluLayer[i]->Delete();
        delete fCluLayer[i];
@@ -142,7 +228,7 @@ AliITStrackerSA::~AliITStrackerSA(){
     delete [] fCluLayer;
   }
   if(fCluCoord){
-    for(Int_t i=0;i<fGeom->GetNlayers();i++){
+    for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
       if(fCluCoord[i]){
        fCluCoord[i]->Delete();
        delete fCluCoord[i];
@@ -151,7 +237,24 @@ AliITStrackerSA::~AliITStrackerSA(){
     delete [] fCluCoord;
   }
   
-  fGeom = 0; 
+}
+
+//____________________________________________________________________________
+Int_t AliITStrackerSA::Clusters2Tracks(AliESDEvent *event){
+// This method is used to find and fit the tracks. By default the corresponding
+// method in the parent class is invoked. In this way a combined tracking
+// TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
+// is done in the ITS only. In the standard reconstruction chain this option
+// can be set via AliReconstruction::SetOption("ITS","onlyITS")
+  Int_t rc=0;
+  if(!fITSStandAlone){
+    rc=AliITStrackerMI::Clusters2Tracks(event);
+  }
+  else {
+    AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
+  }
+  if(!rc) rc=FindTracks(event);
+  return rc;
 }
 
 //____________________________________________________________________________
@@ -168,10 +271,11 @@ void AliITStrackerSA::Init(){
     fPointc[1]=0;
     fVert = 0;
     fVertexer = 0;
-    fGeom = 0;
     SetWindowSizes();
     fITSclusters = 0;
     SetSixPoints();
+    SetOuterStartLayer(0);
+    SetSAFlag(kFALSE);
     fListOfTracks=new TObjArray(0,0);
     fCluLayer = 0;
     fCluCoord = 0;
@@ -194,7 +298,7 @@ void AliITStrackerSA::ResetForFinding(){
  
 
 //______________________________________________________________________
-Int_t AliITStrackerSA::FindTracks(AliESD* event){
+Int_t AliITStrackerSA::FindTracks(AliESDEvent* event){
 
 // Track finder using the ESD object
 
@@ -213,7 +317,7 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
    while (nentr--) {
      AliESDtrack *track=event->GetTrack(nentr);
      if (track->GetStatus()&AliESDtrack::kITSin==AliESDtrack::kITSin){
-       UInt_t idx[6];
+       Int_t idx[12];
        Int_t ncl = track->GetITSclusters(idx);
        for(Int_t k=0;k<ncl;k++){
                 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
@@ -222,6 +326,7 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
      }
    }
 
+   //Get primary vertex
    Double_t primaryVertex[3];
    event->GetVertex()->GetXYZ(primaryVertex);
    //Creates TClonesArray with clusters for each layer. The clusters already used
@@ -229,10 +334,15 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
    
    Int_t nclusters[6]={0,0,0,0,0,0};
    Int_t dmar[6]={0,0,0,0,0,0};
-   fCluLayer = new TClonesArray*[fGeom->GetNlayers()];
-   fCluCoord = new TClonesArray*[fGeom->GetNlayers()];
-
-   for(Int_t i=0;i<fGeom->GetNlayers();i++){
+   if (fCluLayer == 0) {
+   fCluLayer = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
+   fCluCoord = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
+     for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
+        fCluLayer[i]=0;
+        fCluCoord[i]=0;
+     }
+   }
+   for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
      AliITSlayer &layer=fgLayers[i];
      for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
        AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
@@ -241,17 +351,19 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
        nclusters[i]++;
      }
      dmar[i]=0;
+     delete fCluLayer[i];
      fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
+     delete fCluCoord[i];
      fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
    }
 
    
-   Int_t * firstmod = new Int_t[fGeom->GetNlayers()];
-   for(Int_t i=0;i<fGeom->GetNlayers();i++){
-     firstmod[i]=fGeom->GetModuleIndex(i+1,1,1);
+   Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
+   for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
+     firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
    }
    
-   for(Int_t ilay=0;ilay<fGeom->GetNlayers();ilay++){
+   for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){
      TClonesArray &clulay = *fCluLayer[ilay];
      TClonesArray &clucoo = *fCluCoord[ilay];
      AliITSlayer &layer=fgLayers[ilay];
@@ -262,9 +374,8 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
        Double_t phi=0;Double_t lambda=0;
        Float_t x=0;Float_t y=0;Float_t z=0;
        Float_t sx=0;Float_t sy=0;Float_t sz=0;
-       Int_t module = cls->GetDetectorIndex()+firstmod[ilay];
-       GetCoorAngles(cls,module,phi,lambda,x,y,z,primaryVertex);
-       GetCoorErrors(cls,module,sx,sy,sz);
+       GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
+       GetCoorErrors(cls,sx,sy,sz);
        new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
        new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
        dmar[ilay]++;
@@ -272,7 +383,6 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
    }
    
  
-  //Get primary vertex
 
    Int_t ntrack=0;
    //loop on the different windows
@@ -301,8 +411,8 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
 
        fPoint2[0]=arr->GetX();
        fPoint2[1]=arr->GetY();
-       Int_t * nn = new Int_t[fGeom->GetNlayers()];//counter for clusters on each layer
-       for(Int_t i=0;i<fGeom->GetNlayers();i++){ nn[i]=0;}
+       Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()];//counter for clusters on each layer
+       for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ nn[i]=0;}
        nn[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
        
        nn[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
@@ -333,7 +443,7 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
       Int_t numberofpoints;
       if(fSixPoints) numberofpoints=6;  //check of the candidate track
       else numberofpoints=5;           //if track is good (with the required number        
-      for(Int_t nnp=0;nnp<fGeom->GetNlayers();nnp++){    //of points) it is written on file
+      for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers();nnp++){    //of points) it is written on file
         if(nn[nnp]!=0) layOK+=1;
       }
       if(layOK>=numberofpoints){
@@ -346,7 +456,6 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
        outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
        event->AddTrack(&outtrack);
        ntrack++;
-       
       }
        
 
@@ -359,12 +468,12 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
    }
    
    //if 5/6 points are required, second loop starting 
-   //from second layer, to find tracks with point of 
-   //layer 1 missing
-   
-   if(!fSixPoints){
+   //from second layer (SPD2), to find tracks with point of 
+   //layer 1 missing   
+   if(!fSixPoints) {
+     //printf("looking from SPD2\n");
      //   counter for clusters on each layer  
-     Int_t * nn = new Int_t[fGeom->GetNlayers()-1];      
+     Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-1];      
      for(Int_t nloop=0;nloop<fNloop;nloop++){
        Int_t ncl2=fCluLayer[1]->GetEntries();
        while(ncl2--){ //loop starting from layer 2
@@ -384,7 +493,7 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
         
         fPoint2[0]=arr->GetX();
         fPoint2[1]=arr->GetY();
-        for(Int_t kk=0;kk<fGeom->GetNlayers()-1;kk++)nn[kk] = 0;
+        for(Int_t kk=0;kk<AliITSgeomTGeo::GetNLayers()-1;kk++)nn[kk] = 0;
         nn[0] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],
                                   trs,primaryVertex[2],pflag);
         nn[1] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],
@@ -410,7 +519,7 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
                                   trs,primaryVertex[2],pflag);
 
         Int_t fl=0;
-        for(Int_t nnp=0;nnp<fGeom->GetNlayers()-1;nnp++){
+        for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-1;nnp++){
           if(nn[nnp]!=0) fl+=1;
         }
         if(fl>=5){  // 5/6       
@@ -425,14 +534,88 @@ Int_t AliITStrackerSA::FindTracks(AliESD* event){
           ntrack++;
 
         }   
-       
-       
+              
         delete trs;
       }//end loop on clusters of layer2
      }
    
     delete [] nn;
-  }  //end opt="5/6"  
+  } //end opt="5/6"  
+
+
+
+   // search for tracks starting from SPD2, SDD1, SDD2, SSD2
+   // for cosmics (A. Dainese 31.07.07)
+   if(fOuterStartLayer>0) {
+     for(Int_t innLay=1; innLay<=fOuterStartLayer; innLay++) {
+       printf("Searching from layer %d outward\n",innLay);
+       //   counter for clusters on each layer  
+       Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-innLay];      
+       for(Int_t nloop=0;nloop<fNloop;nloop++){
+        Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
+        while(nclInnLay--){ //loop starting from layer innLay
+          ResetForFinding();
+          Int_t pflag=0;
+          AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[innLay]->At(nclInnLay);
+        
+          if(!cl) continue;
+          AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(innLay,nclInnLay);
+          fPhic = arr->GetPhi();
+          fLambdac = arr->GetLambda();
+          fPhiEstimate = fPhic;
+         
+          AliITStrackSA* trs = new AliITStrackSA(); 
+          fPoint1[0]=primaryVertex[0];
+          fPoint1[1]=primaryVertex[1];
+          fPoint2[0]=arr->GetX();
+          fPoint2[1]=arr->GetY();
+
+          Int_t kk;
+          for(kk=0;kk<AliITSgeomTGeo::GetNLayers()-innLay;kk++) nn[kk] = 0;
+
+          kk=0;
+          nn[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
+                                 trs,primaryVertex[2],pflag);
+          for(Int_t nextLay=innLay+1; nextLay<AliITSgeomTGeo::GetNLayers(); nextLay++) {
+            kk++;
+            nn[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
+                                    trs,primaryVertex[2],pflag);
+            if(nn[kk]!=0){
+              pflag=1;
+              if(kk==1) {
+                fPoint3[0]=fPointc[0];
+                fPoint3[1]=fPointc[1];
+              } else {
+                UpdatePoints();
+              }
+            }
+          }
+
+          Int_t fl=0;
+          for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
+            if(nn[nnp]!=0) fl+=1;
+          }
+          if(fl>=AliITSgeomTGeo::GetNLayers()-innLay){ 
+            AliITStrackV2* tr2 = FitShortTrack(trs,primaryVertex,innLay);
+            if(tr2==0){
+              continue;
+            }
+            
+            AliESDtrack outtrack;
+            outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
+            event->AddTrack(&outtrack);
+            ntrack++;
+            
+          }   
+              
+          delete trs;
+        }//end loop on clusters of innLay
+       } //end loop on window sizes
+   
+       delete [] nn;
+     } //end loop on innLay
+   } //end if(fOuterStartLayer>0)
+
    
   delete [] firstmod;
   Info("FindTracks","Number of found tracks: %d",event->GetNumberOfTracks());
@@ -450,14 +633,14 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
   //fit of the found track
 
   
-  Int_t * firstmod = new Int_t[fGeom->GetNlayers()];
-  for(Int_t i=0;i<fGeom->GetNlayers();i++){
-    firstmod[i]=fGeom->GetModuleIndex(i+1,1,1);
+  Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
+    firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
   }  
 
   Int_t nclusters = tr->GetNumberOfClustersSA();
-  TObjArray** listlayer = new TObjArray*[fGeom->GetNlayers()];
-  for(Int_t i=0;i<fGeom->GetNlayers();i++){
+  TObjArray** listlayer = new TObjArray*[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
     listlayer[i] = new TObjArray(0,0);
   }
 
@@ -476,9 +659,9 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
   TArrayI mark5(20);
 
 
-  Int_t * nnn = new Int_t[fGeom->GetNlayers()];
-  Int_t * kkk = new Int_t[fGeom->GetNlayers()];
-  for(Int_t i=0;i<fGeom->GetNlayers();i++) {nnn[i]=0;kkk[i]=0;}
+  Int_t * nnn = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  Int_t * kkk = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {nnn[i]=0;kkk[i]=0;}
   
   for(Int_t ncl=0;ncl<nclusters;ncl++){
     Int_t index = tr->GetClusterIndexSA(ncl); 
@@ -494,7 +677,7 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
   }
   delete [] nnn;
 
-  for(Int_t nlay=0;nlay<fGeom->GetNlayers();nlay++){
+  for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
     for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
       Int_t mark = tr->GetClusterMark(nlay,ncl);
       if(nlay==0) { mark0[kkk[0]]=mark;kkk[0]++;}
@@ -510,8 +693,8 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
   delete [] kkk;
 
  
-  Int_t * end = new Int_t[fGeom->GetNlayers()];
-  for(Int_t i=0;i<fGeom->GetNlayers();i++){
+  Int_t * end = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
     if(listlayer[i]->GetEntries()==0) end[i]=1;
     else end[i]=listlayer[i]->GetEntries();
   }
@@ -521,7 +704,7 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
   Int_t nlist=0;
 
   if(end[0]==0) end[0]=1; //for tracks with cluster on layer 0 missing
-  for(Int_t l1=0;l1<end[0];l1++){//loop on layer 1
+  for(Int_t l1=0;l1<end[0];l1++){ //loop on layer 1
     AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0]->At(l1); 
     Double_t x1,y1,z1,sx1,sy1,sz1;
     Double_t x2,y2,z2,sx2,sy2,sz2;
@@ -534,7 +717,7 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
     Int_t lay1=0;
     Int_t lay2=1;
     Int_t module1=-1;
-    for(Int_t l2=0;l2<end[1];l2++){//loop on layer 2
+    for(Int_t l2=0;l2<end[1];l2++){ //loop on layer 2
       AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1]->At(l2); 
       index2=clind1[l2];
       mrk2 = mark1[l2];
@@ -542,44 +725,51 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
         AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2]->At(l3);
 
         if(cl0==0 && cl1!=0) {
-          p2 = cl2;index1=clind2[l3];mrk1=mark2[l3];lay1=2;
           p1=cl1;
+          p2=cl2;
+         index1=clind1[l2];mrk1=mark1[l2];
+         index2=clind2[l3];mrk2=mark2[l3];
+         lay1=1;
+         lay2=2;
           module1 = p1->GetDetectorIndex()+firstmod[1]; 
         }
         if(cl0!=0 && cl1==0){
           p1=cl0;
-          p2=cl2;index2=clind2[l3];mrk2=mark2[l3];lay2=2;
+          p2=cl2;index2=clind2[l3];mrk2=mark2[l3];
+         lay1=0;
+         lay2=2;
          module1 = p1->GetDetectorIndex()+firstmod[0];
         }
         if(cl0!=0 && cl1!=0){
           p1=cl0;
           p2=cl1;
+         lay1=0;
+         lay2=1;
          module1 = p1->GetDetectorIndex()+firstmod[0];
         }
        
        Int_t cln1=mrk1;
        Int_t cln2=mrk2;
-       AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(lay1,cln1);
-       AliITSclusterTable* arr1= (AliITSclusterTable*)GetClusterCoord(lay2,cln2);
-       x1 = arr->GetX();
-       x2 = arr1->GetX();
-       y1 = arr->GetY();
-       y2 = arr1->GetY();
-       z1 = arr->GetZ();
-       z2 = arr1->GetZ();
-       sx1 = arr->GetSx();
-       sx2 = arr1->GetSx();
-       sy1 = arr->GetSy();
-       sy2 = arr1->GetSy();
-       sz1 = arr->GetSz();
-       sz2 = arr1->GetSz();
+       AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(lay1,cln1);
+       AliITSclusterTable* arr= (AliITSclusterTable*)GetClusterCoord(lay2,cln2);
+       x1 = arr1->GetX();
+       x2 = arr2->GetX();
+       y1 = arr1->GetY();
+       y2 = arr2->GetY();
+       z1 = arr1->GetZ();
+       z2 = arr2->GetZ();
+       sx1 = arr1->GetSx();
+       sx2 = arr2->GetSx();
+       sy1 = arr1->GetSy();
+       sy2 = arr2->GetSy();
+       sz1 = arr1->GetSz();
+       sz2 = arr2->GetSz();
        
        Int_t layer,ladder,detector;
-       fGeom->GetModuleId(module1,layer,ladder,detector);
+       AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector);
         Float_t yclu1 = p1->GetY();
         Float_t zclu1 = p1->GetZ();
-        Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
-        
+        Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);        
        Double_t tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
        Double_t phi2 = TMath::ATan2((y2-y1),(x2-x1));
 
@@ -589,7 +779,7 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
             AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4]->At(l5);
             for(Int_t l6=0;l6<end[5];l6++){ //loop on layer 6  
               AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5]->At(l6);
-              AliITStrackSA* trac = new AliITStrackSA(fGeom,layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
+              AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
                               
               if(cl5!=0) {
                trac->AddClusterV2(5,(clind5[l6] & 0x0fffffff)>>0);
@@ -620,15 +810,15 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
 
               AliITStrackMI* ot = new AliITStrackSA(*trac);
               
-              ot->ResetCovariance();
+              ot->ResetCovariance(10.);
               ot->ResetClusters();
               
-              if(RefitAt(49.,ot,trac)){ //fit from layer 1 to layer 6
+              if(RefitAt(krInsideITSscreen,ot,trac)){ //fit from layer 1 to layer 6
                 AliITStrackMI *otrack2 = new AliITStrackMI(*ot);
-                otrack2->ResetCovariance(); 
+                otrack2->ResetCovariance(10.); 
                 otrack2->ResetClusters();
                 //fit from layer 6 to layer 1
-                if(RefitAt(3.7,otrack2,ot)) {
+                if(RefitAt(krInsideSPD1,otrack2,ot)) {
                  fListOfTracks->AddLast(otrack2);
                  new (tri[nlist]) AliITStrackSA(*trac);
                  nlist++;
@@ -642,8 +832,7 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
               delete trac;
             }//end loop layer 6
           }//end loop layer 5
-        }//end loop layer 4
-        
+        }//end loop layer 4        
       }//end loop layer 3
     }//end loop layer 2 
   }//end loop layer 1
@@ -654,7 +843,7 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
 
   Int_t dim=fListOfTracks->GetEntries();
   if(dim==0){
-    for(Int_t i=0;i<fGeom->GetNlayers();i++){
+    for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
       delete listlayer[i];
     }
     delete [] listlayer;
@@ -669,7 +858,7 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
   AliITStrackSA* trsa = (AliITStrackSA*)listSA->At(lowchi2);
  
   if(otrack==0) {
-    for(Int_t i=0;i<fGeom->GetNlayers();i++){
+    for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
       delete listlayer[i];
     }
     delete [] listlayer; 
@@ -678,8 +867,8 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
     delete [] firstmod;
     return 0;
   }
-  Int_t * indexc = new Int_t[fGeom->GetNlayers()];
-  for(Int_t i=0;i<fGeom->GetNlayers();i++) indexc[i]=0;
+  Int_t * indexc = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0;
   for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
     indexc[nind] = otrack->GetClusterIndex(nind);
   }      
@@ -689,14 +878,14 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
   AliITSRecPoint* cl3 = (AliITSRecPoint*)GetCluster(indexc[3]);
   AliITSRecPoint* cl4 = (AliITSRecPoint*)GetCluster(indexc[4]);
   Int_t labl[3]={-1,-1,-1};
-  if(otrack->GetNumberOfClusters()==fGeom->GetNlayers()){
+  if(otrack->GetNumberOfClusters()==AliITSgeomTGeo::GetNLayers()){
     AliITSRecPoint* cl5 = (AliITSRecPoint*)GetCluster(indexc[5]);
     labl[0]=cl5->GetLabel(0);
     labl[1]=cl5->GetLabel(1);
     labl[2]=cl5->GetLabel(2);
   }
   delete [] indexc;
-  if(otrack->GetNumberOfClusters()==(fGeom->GetNlayers()-1)){
+  if(otrack->GetNumberOfClusters()==(AliITSgeomTGeo::GetNLayers()-1)){
     labl[0]=-1;
     labl[1]=-1;
     labl[2]=-1;
@@ -718,7 +907,7 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
   otrack->SetLabel(label);  
   //remove clusters of found track
 
-  for(Int_t nlay=0;nlay<fGeom->GetNlayers();nlay++){
+  for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
     for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
       Int_t index = trsa->GetClusterMark(nlay,cln);
       fCluLayer[nlay]->RemoveAt(index);
@@ -729,7 +918,301 @@ AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVert
   listSA->Delete();
   delete listSA;
 
-  for(Int_t i=0;i<fGeom->GetNlayers();i++){
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
+    delete listlayer[i];
+  }
+  delete [] listlayer; 
+  delete [] firstmod;
+  return otrack;
+
+}
+
+//________________________________________________________________________
+
+AliITStrackV2* AliITStrackerSA::FitShortTrack(AliITStrackSA* tr,Double_t *primaryVertex,Int_t innLay){
+  //fit of the found track (short tracks, <6 points, for cosmics). A.Dainese 31.07.07 
+
+  
+  Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
+    firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
+  }  
+
+  Int_t nclusters = tr->GetNumberOfClustersSA();
+  TObjArray** listlayer = new TObjArray*[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
+    listlayer[i] = new TObjArray(0,0);
+  }
+
+  TArrayI clind0(20);
+  TArrayI clind1(20);
+  TArrayI clind2(20);
+  TArrayI clind3(20);
+  TArrayI clind4(20);
+  TArrayI clind5(20);
+
+  TArrayI mark0(20);
+  TArrayI mark1(20);
+  TArrayI mark2(20);
+  TArrayI mark3(20);
+  TArrayI mark4(20);
+  TArrayI mark5(20);
+
+
+  Int_t * nnn = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  Int_t * kkk = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {nnn[i]=0;kkk[i]=0;}
+  
+  for(Int_t ncl=0;ncl<nclusters;ncl++){
+    Int_t index = tr->GetClusterIndexSA(ncl); 
+    AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index);
+    if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
+    Int_t lay = (index & 0xf0000000) >> 28;
+    if(lay==0) { listlayer[0]->AddLast(cl); clind0[nnn[0]]=index;nnn[0]++;}
+    if(lay==1) { listlayer[1]->AddLast(cl); clind1[nnn[1]]=index;nnn[1]++;}
+    if(lay==2) { listlayer[2]->AddLast(cl); clind2[nnn[2]]=index;nnn[2]++;}
+    if(lay==3) { listlayer[3]->AddLast(cl); clind3[nnn[3]]=index;nnn[3]++;}
+    if(lay==4) { listlayer[4]->AddLast(cl); clind4[nnn[4]]=index;nnn[4]++;}
+    if(lay==5) { listlayer[5]->AddLast(cl); clind5[nnn[5]]=index;nnn[5]++;}    
+  }
+  delete [] nnn;
+
+  for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
+    for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
+      Int_t mark = tr->GetClusterMark(nlay,ncl);
+      if(nlay==0) { mark0[kkk[0]]=mark;kkk[0]++;}
+      if(nlay==1) { mark1[kkk[1]]=mark;kkk[1]++;}
+      if(nlay==2) { mark2[kkk[2]]=mark;kkk[2]++;}
+      if(nlay==3) { mark3[kkk[3]]=mark;kkk[3]++;}
+      if(nlay==4) { mark4[kkk[4]]=mark;kkk[4]++;}
+      if(nlay==5) { mark5[kkk[5]]=mark;kkk[5]++;}
+
+    }
+  }
+
+  delete [] kkk;
+
+  Int_t * end = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
+    if(listlayer[i]->GetEntries()==0) end[i]=1;
+    else end[i]=listlayer[i]->GetEntries();
+  }
+
+  TClonesArray* listSA = new TClonesArray("AliITStrackSA");
+  TClonesArray &tri = *listSA;
+  Int_t nlist=0;
+
+  //  if(end[0]==0) end[0]=1; //for tracks with cluster on layer 0 missing
+  for(Int_t l1=0;l1<end[0];l1++){ //loop on layer 1
+    AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0]->At(l1); 
+    for(Int_t l2=0;l2<end[1];l2++){ //loop on layer 2
+      AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1]->At(l2); 
+      for(Int_t l3=0;l3<end[2];l3++){  //loop on layer 3
+        AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2]->At(l3);
+        for(Int_t l4=0;l4<end[3];l4++){ //loop on layer 4   
+          AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3]->At(l4);
+          for(Int_t l5=0;l5<end[4];l5++){ //loop on layer 5
+            AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4]->At(l5);
+            for(Int_t l6=0;l6<end[5];l6++){ //loop on layer 6  
+              AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5]->At(l6);
+
+
+             Double_t x1,y1,z1,sx1,sy1,sz1;
+             Double_t x2,y2,z2,sx2,sy2,sz2;
+             AliITSRecPoint* p1=0;
+             AliITSRecPoint* p2=0;
+             Int_t index1=0,index2=0;
+             Int_t mrk1=0,mrk2=0;
+             if(innLay==1) {
+               p1=cl1;
+               p2=cl2;
+               index1=clind1[l2];mrk1=mark1[l2];
+               index2=clind2[l3];mrk2=mark2[l3];
+             } else if(innLay==2) {
+               p1=cl2;
+               p2=cl3;
+               index1=clind2[l3];mrk1=mark2[l3];
+               index2=clind3[l4];mrk2=mark3[l4];
+             } else if(innLay==3) {
+               p1=cl3;
+               p2=cl4;
+               index1=clind3[l4];mrk1=mark3[l4];
+               index2=clind4[l5];mrk2=mark4[l5];
+             } else if(innLay==4) {
+               p1=cl4;
+               p2=cl5;
+               index1=clind4[l5];mrk1=mark4[l5];
+               index2=clind5[l6];mrk2=mark5[l6];
+             }
+             Int_t lay1=innLay;
+             Int_t lay2=innLay+1;
+             Int_t module1 = p1->GetDetectorIndex()+firstmod[innLay]; 
+             
+             Int_t cln1=mrk1;
+             Int_t cln2=mrk2;
+             AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(lay1,cln1);
+             AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(lay2,cln2);
+             x1 = arr1->GetX();
+             x2 = arr2->GetX();
+             y1 = arr1->GetY();
+             y2 = arr2->GetY();
+             z1 = arr1->GetZ();
+             z2 = arr2->GetZ();
+             sx1 = arr1->GetSx();
+             sx2 = arr2->GetSx();
+             sy1 = arr1->GetSy();
+             sy2 = arr2->GetSy();
+             sz1 = arr1->GetSz();
+             sz2 = arr2->GetSz();
+             
+             Int_t layer,ladder,detector;
+             AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector);
+             Float_t yclu1 = p1->GetY();
+             Float_t zclu1 = p1->GetZ();
+             Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);        
+             Double_t tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
+             Double_t phi2 = TMath::ATan2((y2-y1),(x2-x1));
+             //printf("phi2: %f   tgl2: %f\n",phi2,tgl2);
+              AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
+                              
+             //Float_t clxyz[3]; 
+              if(cl5!=0) {
+               trac->AddClusterV2(5,(clind5[l6] & 0x0fffffff)>>0);
+               trac->AddClusterMark(5,mark5[l6]);
+               //cl5->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);       
+             }
+              if(cl4!=0){
+               trac->AddClusterV2(4,(clind4[l5] & 0x0fffffff)>>0);
+               trac->AddClusterMark(4,mark4[l5]);
+               //cl4->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);       
+             }
+              if(cl3!=0){
+               trac->AddClusterV2(3,(clind3[l4] & 0x0fffffff)>>0);
+               trac->AddClusterMark(3,mark3[l4]);
+               //cl3->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);       
+             }
+              if(cl2!=0){
+               trac->AddClusterV2(2,(clind2[l3] & 0x0fffffff)>>0);
+               trac->AddClusterMark(2,mark2[l3]);
+               //cl2->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);       
+             }
+              if(cl1!=0){
+               trac->AddClusterV2(1,(clind1[l2] & 0x0fffffff)>>0);
+               trac->AddClusterMark(1,mark1[l2]);
+               //cl1->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);       
+             }
+              if(cl0!=0){
+               trac->AddClusterV2(0,(clind0[l1] & 0x0fffffff)>>0);
+               trac->AddClusterMark(0,mark0[l1]);
+               //cl0->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);       
+             }
+
+
+              //fit with Kalman filter using AliITStrackerMI::RefitAt()
+             AliITStrackMI* ot = new AliITStrackSA(*trac);
+              
+              ot->ResetCovariance(10.);
+              ot->ResetClusters();
+              
+             //printf("%d  \n",trac->GetNumberOfClusters());for(Int_t ijk=0;ijk<trac->GetNumberOfClusters();ijk++) printf("    %d",trac->GetClusterIndex(ijk)); printf("\n");
+              if(RefitAt(krInsideITSscreen,ot,trac)){ //fit from layer 1 to layer 6
+                AliITStrackMI *otrack2 = new AliITStrackMI(*ot);
+                otrack2->ResetCovariance(10.); 
+                otrack2->ResetClusters();
+                //fit from layer 6 to layer 1
+                if(RefitAt(krInsideSPD1,otrack2,ot)) {
+                 fListOfTracks->AddLast(otrack2);
+                 new (tri[nlist]) AliITStrackSA(*trac);
+                 nlist++;
+               } else {
+                 delete otrack2;
+               }
+                              
+              }       
+          
+              delete ot;
+              delete trac;
+            }//end loop layer 6
+          }//end loop layer 5
+        }//end loop layer 4        
+      }//end loop layer 3
+    }//end loop layer 2 
+  }//end loop layer 1
+
+  delete [] end;
+
+
+  Int_t dim=fListOfTracks->GetEntries();
+  if(dim==0){
+    for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
+      delete listlayer[i];
+    }
+    delete [] listlayer;
+    listSA->Delete();
+    delete listSA;
+    delete [] firstmod;
+    return 0;
+  }
+
+  Int_t lowchi2 = FindTrackLowChiSquare(fListOfTracks,dim);
+  AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
+  AliITStrackSA* trsa = (AliITStrackSA*)listSA->At(lowchi2);
+  if(otrack==0) {
+    for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
+      delete listlayer[i];
+    }
+    delete [] listlayer; 
+    listSA->Delete();
+    delete listSA;
+    delete [] firstmod;
+    return 0;
+  }
+  Int_t * indexc = new Int_t[AliITSgeomTGeo::GetNLayers()];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0;
+  for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
+    indexc[nind] = otrack->GetClusterIndex(nind);
+  }      
+  Int_t labl[6][3];
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
+    if(i<otrack->GetNumberOfClusters()) {
+      AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc[i]);
+      labl[i][0]=cl->GetLabel(0);
+      labl[i][1]=cl->GetLabel(1);
+      labl[i][2]=cl->GetLabel(2);
+    } else {
+      labl[i][0]=-1;
+      labl[i][1]=-1;
+      labl[i][2]=-1;
+    }
+  }
+  delete [] indexc;
+  Int_t numberofpoints=AliITSgeomTGeo::GetNLayers()-innLay;
+  CookLabel(otrack,0.); //MI change - to see fake ratio
+  Int_t label=FindLabel(labl[0][0],labl[1][0],labl[2][0],labl[3][0],labl[4][0],labl[5][0]);
+  Int_t lflag=0;
+  for(Int_t i=0;i<numberofpoints;i++)
+    if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
+  
+  if(lflag<numberofpoints) label = -label;
+  otrack->SetLabel(label);  
+
+  //remove clusters of found track
+  for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
+    for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
+      Int_t index = trsa->GetClusterMark(nlay,cln);
+      fCluLayer[nlay]->RemoveAt(index);
+      RemoveClusterCoord(nlay,index);
+      fCluLayer[nlay]->Compress();
+    }    
+  }
+  listSA->Delete();
+  delete listSA;
+
+  for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
     delete listlayer[i];
   }
   delete [] listlayer; 
@@ -751,8 +1234,8 @@ Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t la
     FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
     if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
        return 0;
-    Double_t fi1=TMath::ATan2(cy1,cx1);
-    Double_t fi2=TMath::ATan2(cy2,cx2);
+    Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
+    Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
     fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
   }
 
@@ -876,13 +1359,13 @@ Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
 
 //_________________________________________________________________
 Int_t AliITStrackerSA::FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const {
-  // returns track with lowes chi square  
+  // returns track with lowers chi square  
   if(dim==1){
     //AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(0);
     //return trk;
     return 0;
   }
-  //if(dim==0) return 0;
+  if(dim==0) return 0;
   Double_t * chi2 = new Double_t[dim];
   Int_t * index = new Int_t[dim];
   for(Int_t i=0;i<dim;i++){
@@ -906,10 +1389,10 @@ Int_t AliITStrackerSA::FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) co
     }
     w++;
   }
-
+  Int_t tmp = index[dim-1];
   delete [] chi2;
   delete [] index;
-  return index[dim-1];
+  return tmp;
 }
 
 //__________________________________________________________
@@ -922,7 +1405,7 @@ Int_t AliITStrackerSA::FindLabel(Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l
   Int_t ff=0; 
   Int_t ll=0;
   Int_t k=0;Int_t w=0;Int_t num=6;
-  if(lb[5]==-1) num=5;
+  for(Int_t i=5;i>=0;i--) if(lb[i]==-1) num=i;
   
   while(k<num){
   
@@ -934,11 +1417,11 @@ Int_t AliITStrackerSA::FindLabel(Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l
         aa[i]=0;
       }
     }
-  k++;
+    k++;
   }
 
   while(w<num){
-  
     for(Int_t j=0;j<6;j++){
       if(aa[w]<aa[j]){
       ff=aa[w];
@@ -949,10 +1432,11 @@ Int_t AliITStrackerSA::FindLabel(Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l
       lb[j]=ll;
      }
     }
-  w++;
+    w++;
   }
-  if(num==6)  return lb[5];
-  else return lb[4];
+  
+  if(num<1) return -1; 
+  return lb[num-1];
 }
 
 //_____________________________________________________________________________
@@ -1021,9 +1505,9 @@ void AliITStrackerSA::SetWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
 
 }
 //_______________________________________________________________________
-void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Int_t module,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){
+void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){
   //Returns values of phi (azimuthal) and lambda angles for a given cluster
-  
+/*  
   Double_t rot[9];     fGeom->GetRotMatrix(module,rot);
   Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
   Float_t tx,ty,tz;  fGeom->GetTrans(lay,lad,det,tx,ty,tz);     
@@ -1035,30 +1519,44 @@ void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Int_t module,Double_t &ph
   Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
   Float_t r=tx*cp+ty*sp;
 
-  x= r*cp - cl->GetY()*sp;
+  xyz= r*cp - cl->GetY()*sp;
   y= r*sp + cl->GetY()*cp;
   z=cl->GetZ();
-  
-  phi=TMath::ATan2(y,x);
+*/
+  Float_t xyz[3];
+  cl->GetGlobalXYZ(xyz);
+  x=xyz[0];
+  y=xyz[1];
+  z=xyz[2];
+  phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
   lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
 }
 
 //________________________________________________________________________
-void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl, Int_t module,Float_t &sx,Float_t &sy, Float_t &sz){
-
-  //returns x,y,z of cluster in global coordinates
+void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
 
+  //returns sigmax, y, z of cluster in global coordinates
+/*
   Double_t rot[9];     fGeom->GetRotMatrix(module,rot);
-  Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
+  Int_t lay,lad,det; 
+  AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
  
   Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
   Double_t phi=TMath::Pi()/2+alpha;
   if (lay==1) phi+=TMath::Pi();
 
   Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
-
+*/
+  Float_t covm[6];
+  cl->GetGlobalCov(covm);
+  sx=TMath::Sqrt(covm[0]);
+  sy=TMath::Sqrt(covm[3]);
+  sz=TMath::Sqrt(covm[5]);
+/*
   sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
   sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
   sz = TMath::Sqrt(cl->GetSigmaZ2());
-
+*/
 }
+