(Marian)
[u/mrichter/AliRoot.git] / TPC / AliTPCtrackerMI.cxx
index 0f0bd3b..ce18704 100644 (file)
 //
 //   Origin: Marian Ivanov   Marian.Ivanov@cern.ch
 // 
-//  AliTPC parallel tracker - 
-//  How to use?  - 
-//  run AliTPCFindClusters.C macro - clusters neccessary for tracker are founded
-//  run AliTPCFindTracksMI.C macro - to find tracks
-//  tracks are written to AliTPCtracks.root file
-//  for comparison also seeds are written to the same file - to special branch
+//  AliTPC parallel tracker
 //-------------------------------------------------------
 
 
 /* $Id$ */
 
-
-
 #include "Riostream.h"
 #include <TClonesArray.h>
 #include <TFile.h>
 #include <TObjArray.h>
 #include <TTree.h>
+#include "AliLog.h"
 
 #include "AliComplexCluster.h"
 #include "AliESD.h"
+#include "AliESDkink.h"
 #include "AliHelix.h"
 #include "AliRunLoader.h"
 #include "AliTPCClustersRow.h"
 #include "AliTPCParam.h"
+#include "AliTPCReconstructor.h"
 #include "AliTPCclusterMI.h"
 #include "AliTPCpolyTrack.h"
-#include "AliTPCreco.h" 
+#include "AliTPCreco.h"
+#include "AliTPCseed.h" 
 #include "AliTPCtrackerMI.h"
 #include "TStopwatch.h"
+#include "AliTPCReconstructor.h"
+#include "AliESDkink.h"
+#include "AliPID.h"
+#include "TTreeStream.h"
+#include "AliAlignObj.h"
+#include "AliTrackPointArray.h"
+
 //
 
-ClassImp(AliTPCseed)
 ClassImp(AliTPCtrackerMI)
 
 
@@ -121,13 +124,13 @@ Int_t AliTPCtrackerMI::UpdateTrack(AliTPCseed * track, Int_t accept){
   track->fClusterPointer[track->fRow] = c;  
   //
 
-  Float_t angle2 = track->GetSnp()*track->GetSnp();
-  angle2 = TMath::Sqrt(angle2/(1-angle2)); 
+  Double_t angle2 = track->GetSnp()*track->GetSnp();
   //
   //SET NEW Track Point
   //
-  //  if (debug)
+  if (angle2<1) //PH sometimes angle2 is very big. To be investigated...
   {
+    angle2 = TMath::Sqrt(angle2/(1-angle2)); 
     AliTPCTrackerPoint   &point =*(track->GetTrackPoint(track->fRow));
     //
     point.SetSigmaY(c->GetSigmaY2()/track->fCurrentSigmaY2);
@@ -254,8 +257,24 @@ AliTracker(), fkNIS(par->GetNInnerSector()/2), fkNOS(par->GetNOuterSector()/2)
   fNewIO     =0;
   fDebug     =0;
   fEvent     =0;
+  fDebugStreamer = new TTreeSRedirector("TPCdebug.root");
+}
+//________________________________________________________________________
+AliTPCtrackerMI::AliTPCtrackerMI(const AliTPCtrackerMI &t):
+  AliTracker(t),
+  fkNIS(t.fkNIS),
+  fkNOS(t.fkNOS)
+{
+  //------------------------------------
+  // dummy copy constructor
+  //------------------------------------------------------------------
+}
+AliTPCtrackerMI & AliTPCtrackerMI::operator=(const AliTPCtrackerMI& /*r*/){
+  //------------------------------
+  // dummy 
+  //--------------------------------------------------------------
+  return *this;
 }
-
 //_____________________________________________________________________________
 AliTPCtrackerMI::~AliTPCtrackerMI() {
   //------------------------------------------------------------------
@@ -267,6 +286,7 @@ AliTPCtrackerMI::~AliTPCtrackerMI() {
     fSeeds->Delete(); 
     delete fSeeds;
   }
+  if (fDebugStreamer) delete fDebugStreamer;
 }
 
 void AliTPCtrackerMI::SetIO()
@@ -341,18 +361,113 @@ void AliTPCtrackerMI::FillESD(TObjArray* arr)
     // write tracks to the event
     // store index of the track
     Int_t nseed=arr->GetEntriesFast();
+    //FindKinks(arr,fEvent);
     for (Int_t i=0; i<nseed; i++) {
       AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);    
       if (!pt) continue; 
-      pt->PropagateTo(fParam->GetInnerRadiusLow());
+      pt->UpdatePoints();
+      //      pt->PropagateTo(fParam->GetInnerRadiusLow());
+      if (pt->GetKinkIndex(0)<=0){  //don't propagate daughter tracks 
+       pt->PropagateTo(fParam->GetInnerRadiusLow());
+      }
+      if (( pt->GetPoints()[2]- pt->GetPoints()[0])>5 && pt->GetPoints()[3]>0.8){
+       AliESDtrack iotrack;
+       iotrack.UpdateTrackParams(pt,AliESDtrack::kTPCin);
+       iotrack.SetTPCPoints(pt->GetPoints());
+       iotrack.SetKinkIndexes(pt->GetKinkIndexes());
+       iotrack.SetV0Indexes(pt->GetV0Indexes());
+       //      iotrack.SetTPCpid(pt->fTPCr);
+       //iotrack.SetTPCindex(i);
+       fEvent->AddTrack(&iotrack);
+       continue;
+      }
+       
       if ( (pt->GetNumberOfClusters()>70)&& (Float_t(pt->GetNumberOfClusters())/Float_t(pt->fNFoundable))>0.55) {
        AliESDtrack iotrack;
+       iotrack.UpdateTrackParams(pt,AliESDtrack::kTPCin);
+       iotrack.SetTPCPoints(pt->GetPoints());
+       //iotrack.SetTPCindex(i);
+       iotrack.SetKinkIndexes(pt->GetKinkIndexes());
+       iotrack.SetV0Indexes(pt->GetV0Indexes());
+       //      iotrack.SetTPCpid(pt->fTPCr);
+       fEvent->AddTrack(&iotrack);
+       continue;
+      } 
+      //
+      // short tracks  - maybe decays
+
+      if ( (pt->GetNumberOfClusters()>30) && (Float_t(pt->GetNumberOfClusters())/Float_t(pt->fNFoundable))>0.70) {
+       Int_t found,foundable,shared;
+       pt->GetClusterStatistic(0,60,found, foundable,shared,kFALSE);
+       if ( (found>20) && (pt->fNShared/float(pt->GetNumberOfClusters())<0.2)){
+         AliESDtrack iotrack;
+         iotrack.UpdateTrackParams(pt,AliESDtrack::kTPCin);    
+         //iotrack.SetTPCindex(i);
+         iotrack.SetTPCPoints(pt->GetPoints());
+         iotrack.SetKinkIndexes(pt->GetKinkIndexes());
+         iotrack.SetV0Indexes(pt->GetV0Indexes());
+         //iotrack.SetTPCpid(pt->fTPCr);
+         fEvent->AddTrack(&iotrack);
+         continue;
+       }
+      }       
+      
+      if ( (pt->GetNumberOfClusters()>20) && (Float_t(pt->GetNumberOfClusters())/Float_t(pt->fNFoundable))>0.8) {
+       Int_t found,foundable,shared;
+       pt->GetClusterStatistic(0,60,found, foundable,shared,kFALSE);
+       if (found<20) continue;
+       if (pt->fNShared/float(pt->GetNumberOfClusters())>0.2) continue;
+       //
+       AliESDtrack iotrack;
        iotrack.UpdateTrackParams(pt,AliESDtrack::kTPCin);      
+       iotrack.SetTPCPoints(pt->GetPoints());
+       iotrack.SetKinkIndexes(pt->GetKinkIndexes());
+       iotrack.SetV0Indexes(pt->GetV0Indexes());
+       //iotrack.SetTPCpid(pt->fTPCr);
        //iotrack.SetTPCindex(i);
        fEvent->AddTrack(&iotrack);
-      }        
+       continue;
+      }   
+      // short tracks  - secondaties
+      //
+      if ( (pt->GetNumberOfClusters()>30) ) {
+       Int_t found,foundable,shared;
+       pt->GetClusterStatistic(128,158,found, foundable,shared,kFALSE);
+       if ( (found>20) && (pt->fNShared/float(pt->GetNumberOfClusters())<0.2) &&float(found)/float(foundable)>0.8){
+         AliESDtrack iotrack;
+         iotrack.UpdateTrackParams(pt,AliESDtrack::kTPCin);    
+         iotrack.SetTPCPoints(pt->GetPoints());
+         iotrack.SetKinkIndexes(pt->GetKinkIndexes());
+         iotrack.SetV0Indexes(pt->GetV0Indexes());
+         //iotrack.SetTPCpid(pt->fTPCr);       
+         //iotrack.SetTPCindex(i);
+         fEvent->AddTrack(&iotrack);
+         continue;
+       }
+      }       
+      
+      if ( (pt->GetNumberOfClusters()>15)) {
+       Int_t found,foundable,shared;
+       pt->GetClusterStatistic(138,158,found, foundable,shared,kFALSE);
+       if (found<15) continue;
+       if (foundable<=0) continue;
+       if (pt->fNShared/float(pt->GetNumberOfClusters())>0.2) continue;
+       if (float(found)/float(foundable)<0.8) continue;
+       //
+       AliESDtrack iotrack;
+       iotrack.UpdateTrackParams(pt,AliESDtrack::kTPCin);      
+       iotrack.SetTPCPoints(pt->GetPoints());
+       iotrack.SetKinkIndexes(pt->GetKinkIndexes());
+       iotrack.SetV0Indexes(pt->GetV0Indexes());
+       //      iotrack.SetTPCpid(pt->fTPCr);
+       //iotrack.SetTPCindex(i);
+       fEvent->AddTrack(&iotrack);
+       continue;
+      }   
     }
   }
+  printf("Number of filled ESDs-\t%d\n",fEvent->GetNumberOfTracks());
 }
 
 void AliTPCtrackerMI::WriteTracks(TTree * tree)
@@ -527,7 +642,7 @@ Double_t AliTPCtrackerMI::ErrY2(AliTPCseed* seed, AliTPCclusterMI * cl){
   Float_t z = TMath::Abs(fParam->GetZLength()-TMath::Abs(seed->GetZ()));
   Int_t ctype = cl->GetType();  
   Float_t padlength= GetPadPitchLength(seed->fRow);
-  Float_t angle2 = seed->GetSnp()*seed->GetSnp();
+  Double_t angle2 = seed->GetSnp()*seed->GetSnp();
   angle2 = angle2/(1-angle2); 
   //
   //cluster "quality"
@@ -662,7 +777,7 @@ Double_t AliTPCtrackerMI::ErrZ2(AliTPCseed* seed, AliTPCclusterMI * cl){
   Int_t ctype = cl->GetType();  
   Float_t padlength= GetPadPitchLength(seed->fRow);
   //
-  Float_t angle2 = seed->GetSnp()*seed->GetSnp();
+  Double_t angle2 = seed->GetSnp()*seed->GetSnp();
   //  if (angle2<0.6) angle2 = 0.6;
   angle2 = seed->GetTgl()*seed->GetTgl()*(1+angle2/(1-angle2)); 
   //
@@ -797,160 +912,6 @@ Double_t AliTPCtrackerMI::ErrZ2(AliTPCseed* seed, AliTPCclusterMI * cl){
 
 
 
-void AliTPCseed::Reset(Bool_t all)
-{
-  //
-  //
-  SetNumberOfClusters(0);
-  fNFoundable = 0;
-  SetChi2(0);
-  ResetCovariance();
-  /*
-  if (fTrackPoints){
-    for (Int_t i=0;i<8;i++){
-      delete [] fTrackPoints[i];
-    }
-    delete fTrackPoints;
-    fTrackPoints =0;
-  }
-  */
-
-  if (all){   
-    for (Int_t i=0;i<200;i++) SetClusterIndex2(i,-3);
-    for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
-  }
-
-}
-
-
-void AliTPCseed::Modify(Double_t factor)
-{
-
-  //------------------------------------------------------------------
-  //This function makes a track forget its history :)  
-  //------------------------------------------------------------------
-  if (factor<=0) {
-    ResetCovariance();
-    return;
-  }
-  fC00*=factor;
-  fC10*=0;  fC11*=factor;
-  fC20*=0;  fC21*=0;  fC22*=factor;
-  fC30*=0;  fC31*=0;  fC32*=0;  fC33*=factor;
-  fC40*=0;  fC41*=0;  fC42*=0;  fC43*=0;  fC44*=factor;
-  SetNumberOfClusters(0);
-  fNFoundable =0;
-  SetChi2(0);
-  fRemoval = 0;
-  fCurrentSigmaY2 = 0.000005;
-  fCurrentSigmaZ2 = 0.000005;
-  fNoCluster     = 0;
-  //fFirstPoint = 160;
-  //fLastPoint  = 0;
-}
-
-
-
-
-Int_t  AliTPCseed::GetProlongation(Double_t xk, Double_t &y, Double_t & z) const
-{
-  //-----------------------------------------------------------------
-  // This function find proloncation of a track to a reference plane x=xk.
-  // doesn't change internal state of the track
-  //-----------------------------------------------------------------
-  
-  Double_t x1=fX, x2=x1+(xk-x1), dx=x2-x1;
-
-  if (TMath::Abs(fP4*xk - fP2) >= 0.999) {   
-    return 0;
-  }
-
-  //  Double_t y1=fP0, z1=fP1;
-  Double_t c1=fP4*x1 - fP2, r1=sqrt(1.- c1*c1);
-  Double_t c2=fP4*x2 - fP2, r2=sqrt(1.- c2*c2);
-  
-  y = fP0;
-  z = fP1;
-  //y += dx*(c1+c2)/(r1+r2);
-  //z += dx*(c1+c2)/(c1*r2 + c2*r1)*fP3;
-  
-  Double_t dy = dx*(c1+c2)/(r1+r2);
-  Double_t dz = 0;
-  //
-  Double_t delta = fP4*dx*(c1+c2)/(c1*r2 + c2*r1);
-  /*
-  if (TMath::Abs(delta)>0.0001){
-    dz = fP3*TMath::ASin(delta)/fP4;
-  }else{
-    dz = dx*fP3*(c1+c2)/(c1*r2 + c2*r1);
-  }
-  */
-  dz =  fP3*AliTPCFastMath::FastAsin(delta)/fP4;
-  //
-  y+=dy;
-  z+=dz;
-  
-
-  return 1;  
-}
-
-
-//_____________________________________________________________________________
-Double_t AliTPCseed::GetPredictedChi2(const AliTPCclusterMI *c) const 
-{
-  //-----------------------------------------------------------------
-  // This function calculates a predicted chi2 increment.
-  //-----------------------------------------------------------------
-  //Double_t r00=c->GetSigmaY2(), r01=0., r11=c->GetSigmaZ2();
-  Double_t r00=fErrorY2, r01=0., r11=fErrorZ2;
-  r00+=fC00; r01+=fC10; r11+=fC11;
-
-  Double_t det=r00*r11 - r01*r01;
-  if (TMath::Abs(det) < 1.e-10) {
-    Int_t n=GetNumberOfClusters();
-    if (n>4) cerr<<n<<" AliKalmanTrack warning: Singular matrix !\n";
-    return 1e10;
-  }
-  Double_t tmp=r00; r00=r11; r11=tmp; r01=-r01;
-  
-  Double_t dy=c->GetY() - fP0, dz=c->GetZ() - fP1;
-  
-  return (dy*r00*dy + 2*r01*dy*dz + dz*r11*dz)/det;
-}
-
-
-//_________________________________________________________________________________________
-
-
-Int_t AliTPCseed::Compare(const TObject *o) const {
-  //-----------------------------------------------------------------
-  // This function compares tracks according to the sector - for given sector according z
-  //-----------------------------------------------------------------
-  AliTPCseed *t=(AliTPCseed*)o;
-
-  if (fSort == 0){
-    if (t->fRelativeSector>fRelativeSector) return -1;
-    if (t->fRelativeSector<fRelativeSector) return 1;
-    Double_t z2 = t->GetZ();
-    Double_t z1 = GetZ();
-    if (z2>z1) return 1;
-    if (z2<z1) return -1;
-    return 0;
-  }
-  else {
-    Float_t f2 =1;
-    f2 = 1-20*TMath::Sqrt(t->fC44)/(TMath::Abs(t->GetC())+0.0066);
-    if (t->fBConstrain) f2=1.2;
-
-    Float_t f1 =1;
-    f1 = 1-20*TMath::Sqrt(fC44)/(TMath::Abs(GetC())+0.0066);
-
-    if (fBConstrain)   f1=1.2;
-    if (t->GetNumberOfClusters()*f2 <GetNumberOfClusters()*f1) return -1;
-    else return +1;
-  }
-}
 
 void AliTPCtrackerMI::RotateToLocal(AliTPCseed *seed)
 {
@@ -973,65 +934,6 @@ void AliTPCtrackerMI::RotateToLocal(AliTPCseed *seed)
 
 
 
-
-//_____________________________________________________________________________
-Int_t AliTPCseed::Update(const AliTPCclusterMI *c, Double_t chisq, UInt_t /*index*/) {
-  //-----------------------------------------------------------------
-  // This function associates a cluster with this track.
-  //-----------------------------------------------------------------
-  Double_t r00=fErrorY2, r01=0., r11=fErrorZ2;
-
-  r00+=fC00; r01+=fC10; r11+=fC11;
-  Double_t det=r00*r11 - r01*r01;
-  Double_t tmp=r00; r00=r11/det; r11=tmp/det; r01=-r01/det;
-
-  Double_t k00=fC00*r00+fC10*r01, k01=fC00*r01+fC10*r11;
-  Double_t k10=fC10*r00+fC11*r01, k11=fC10*r01+fC11*r11;
-  Double_t k20=fC20*r00+fC21*r01, k21=fC20*r01+fC21*r11;
-  Double_t k30=fC30*r00+fC31*r01, k31=fC30*r01+fC31*r11;
-  Double_t k40=fC40*r00+fC41*r01, k41=fC40*r01+fC41*r11;
-
-  Double_t dy=c->GetY() - fP0, dz=c->GetZ() - fP1;
-  Double_t cur=fP4 + k40*dy + k41*dz, eta=fP2 + k20*dy + k21*dz;
-  if (TMath::Abs(cur*fX-eta) >= 0.9) {
-    return 0;
-  }
-
-  fP0 += k00*dy + k01*dz;
-  fP1 += k10*dy + k11*dz;
-  fP2  = eta;
-  fP3 += k30*dy + k31*dz;
-  fP4  = cur;
-
-  Double_t c01=fC10, c02=fC20, c03=fC30, c04=fC40;
-  Double_t c12=fC21, c13=fC31, c14=fC41;
-
-  fC00-=k00*fC00+k01*fC10; fC10-=k00*c01+k01*fC11;
-  fC20-=k00*c02+k01*c12;   fC30-=k00*c03+k01*c13;
-  fC40-=k00*c04+k01*c14; 
-
-  fC11-=k10*c01+k11*fC11;
-  fC21-=k10*c02+k11*c12;   fC31-=k10*c03+k11*c13;
-  fC41-=k10*c04+k11*c14; 
-
-  fC22-=k20*c02+k21*c12;   fC32-=k20*c03+k21*c13;
-  fC42-=k20*c04+k21*c14; 
-
-  fC33-=k30*c03+k31*c13;
-  fC43-=k40*c03+k41*c13; 
-
-  fC44-=k40*c04+k41*c14; 
-
-  Int_t n=GetNumberOfClusters();
-  //  fIndex[n]=index;
-  SetNumberOfClusters(n+1);
-  SetChi2(GetChi2()+chisq);
-
-  return 1;
-}
-
-
-
 //_____________________________________________________________________________
 Double_t AliTPCtrackerMI::F1old(Double_t x1,Double_t y1,
                    Double_t x2,Double_t y2,
@@ -1226,6 +1128,9 @@ Int_t  AliTPCtrackerMI::LoadClusters()
     //  
     Int_t sec,row;
     fParam->AdjustSectorRow(clrow->GetID(),sec,row);
+    for (Int_t icl=0; icl<clrow->GetArray()->GetEntriesFast(); icl++){
+      Transform((AliCluster*)(clrow->GetArray()->At(icl)));
+    }
     //
     AliTPCRow * tpcrow=0;
     Int_t left=0;
@@ -1288,6 +1193,21 @@ void AliTPCtrackerMI::UnloadClusters()
   return ;
 }
 
+void   AliTPCtrackerMI::Transform(AliCluster * cluster){
+  //
+  // 
+  //
+  //if (!fParam->IsGeoRead()) fParam->ReadGeoMatrices();
+  TGeoHMatrix  *mat = fParam->GetClusterMatrix(cluster->GetDetector());
+  //TGeoHMatrix  mat;
+  Double_t pos[3]= {cluster->GetX(),cluster->GetY(),cluster->GetZ()};
+  Double_t posC[3];
+  //mat.LocalToMaster(pos,posC);
+  mat->LocalToMaster(pos,posC);
+  cluster->SetX(posC[0]);
+  cluster->SetY(posC[1]);
+  cluster->SetZ(posC[2]);
+}
 
 //_____________________________________________________________________________
 Int_t AliTPCtrackerMI::LoadOuterSectors() {
@@ -1393,29 +1313,46 @@ AliTPCclusterMI *AliTPCtrackerMI::GetClusterMI(Int_t index) const {
   //--------------------------------------------------------------------
   //       Return pointer to a given cluster
   //--------------------------------------------------------------------
+  if (index<0) return 0; // no cluster
   Int_t sec=(index&0xff000000)>>24; 
   Int_t row=(index&0x00ff0000)>>16; 
   Int_t ncl=(index&0x00007fff)>>00;
 
   const AliTPCRow * tpcrow=0;
   AliTPCclusterMI * clrow =0;
+
+  if (sec<0 || sec>=fkNIS*4) {
+    AliWarning(Form("Wrong sector %d",sec));
+    return 0x0;
+  }
+
   if (sec<fkNIS*2){
     tpcrow = &(fInnerSec[sec%fkNIS][row]);
-    if (sec<fkNIS) 
+    if (tpcrow==0) return 0;
+
+    if (sec<fkNIS) {
+      if (tpcrow->fN1<=ncl) return 0;
       clrow = tpcrow->fClusters1;
-    else
+    }
+    else {
+      if (tpcrow->fN2<=ncl) return 0;
       clrow = tpcrow->fClusters2;
+    }
   }
-  else{
+  else {
     tpcrow = &(fOuterSec[(sec-fkNIS*2)%fkNOS][row]);
-    if (sec-2*fkNIS<fkNOS)
+    if (tpcrow==0) return 0;
+
+    if (sec-2*fkNIS<fkNOS) {
+      if (tpcrow->fN1<=ncl) return 0;
       clrow = tpcrow->fClusters1;
-    else
+    }
+    else {
+      if (tpcrow->fN2<=ncl) return 0;
       clrow = tpcrow->fClusters2;
+    }
   }
-  if (tpcrow==0) return 0;
-  if (tpcrow->GetN()<=ncl) return 0;
-  //  return (AliTPCclusterMI*)(*tpcrow)[ncl];      
+
   return &(clrow[ncl]);      
   
 }
@@ -1454,9 +1391,9 @@ Int_t AliTPCtrackerMI::FollowToNext(AliTPCseed& t, Int_t nr) {
       if (TMath::Abs(angle-t.GetAlpha())>0.001){
        Double_t rotation = angle-t.GetAlpha();
        t.fRelativeSector= relativesector;
-       t.Rotate(rotation);     
+       if (!t.Rotate(rotation)) return 0;      
       }
-      t.PropagateTo(x);
+      if (!t.PropagateTo(x)) return 0;
       //
       t.fCurrentCluster = cl; 
       t.fRow = nr;
@@ -1476,10 +1413,15 @@ Int_t AliTPCtrackerMI::FollowToNext(AliTPCseed& t, Int_t nr) {
       }    
     }
   }
-  if (fIteration>1) return 0;  // not look for new cluster during refitting
+  if (TMath::Abs(t.GetSnp())>AliTPCReconstructor::GetMaxSnpTracker()) return 0;  // cut on angle
+  if (fIteration>1){
+    // not look for new cluster during refitting    
+    t.fNFoundable++; 
+    return 0;
+  }
   //
   UInt_t index=0;
-  if (TMath::Abs(t.GetSnp())>0.95 || TMath::Abs(x*t.GetC()-t.GetEta())>0.95) return 0;
+  //  if (TMath::Abs(t.GetSnp())>0.95 || TMath::Abs(x*t.GetC()-t.GetEta())>0.95) return 0;// patch 28 fev 06
   Double_t  y=t.GetYat(x);
   if (TMath::Abs(y)>ymax){
     if (y > ymax) {
@@ -1501,6 +1443,16 @@ Int_t AliTPCtrackerMI::FollowToNext(AliTPCseed& t, Int_t nr) {
   y=t.GetY(); 
   Double_t z=t.GetZ();
   //
+  if (!IsActive(t.fRelativeSector,nr)) {
+    t.fInDead = kTRUE;
+    t.SetClusterIndex2(nr,-1); 
+    return 0;
+  }
+  //AliInfo(Form("A - Sector%d phi %f - alpha %f", t.fRelativeSector,y/x, t.GetAlpha()));
+  Bool_t isActive  = IsActive(t.fRelativeSector,nr);
+  Bool_t isActive2 = (nr>=fInnerSec->GetNRows()) ? fOuterSec[t.fRelativeSector][nr-fInnerSec->GetNRows()].GetN()>0:fInnerSec[t.fRelativeSector][nr].GetN()>0;
+  
+  if (!isActive || !isActive2) return 0;
   const AliTPCRow &krow=GetRow(t.fRelativeSector,nr);
   if ( (t.GetSigmaY2()<0) || t.GetSigmaZ2()<0) return 0;
   Double_t  roady  =1.;
@@ -1513,7 +1465,8 @@ Int_t AliTPCtrackerMI::FollowToNext(AliTPCseed& t, Int_t nr) {
   } 
   else
     {
-      if (TMath::Abs(z)<(1.05*x+10)) t.fNFoundable++;
+      if (TMath::Abs(z)<(AliTPCReconstructor::GetCtgRange()*x+10) && TMath::Abs(z)<fParam->GetZLength() && (TMath::Abs(t.GetSnp())<AliTPCReconstructor::GetMaxSnpTracker())) 
+       t.fNFoundable++;
       else
        return 0;
     }   
@@ -1610,7 +1563,7 @@ Int_t AliTPCtrackerMI::FollowToNextFast(AliTPCseed& t, Int_t nr) {
   } 
   else
     {
-      if (TMath::Abs(z)>(1.05*x+10)) t.SetClusterIndex2(row,-1);
+      if (TMath::Abs(z)>(AliTPCReconstructor::GetCtgRange()*x+10)) t.SetClusterIndex2(row,-1);
     }   
   //calculate 
   
@@ -1634,6 +1587,53 @@ Int_t AliTPCtrackerMI::FollowToNextFast(AliTPCseed& t, Int_t nr) {
 
 
 
+//_________________________________________________________________________
+Bool_t AliTPCtrackerMI::GetTrackPoint(Int_t index, AliTrackPoint &p ) const
+{
+  // Get track space point by index
+  // return false in case the cluster doesn't exist
+  AliTPCclusterMI *cl = GetClusterMI(index);
+  if (!cl) return kFALSE;
+  Int_t sector = (index&0xff000000)>>24;
+  //  Int_t row = (index&0x00ff0000)>>16;
+  Float_t xyz[3];
+  //  xyz[0] = fParam->GetPadRowRadii(sector,row);
+  xyz[0] = cl->GetX();
+  xyz[1] = cl->GetY();
+  xyz[2] = cl->GetZ();
+  Float_t sin,cos;
+  fParam->AdjustCosSin(sector,cos,sin);
+  Float_t x = cos*xyz[0]-sin*xyz[1];
+  Float_t y = cos*xyz[1]+sin*xyz[0];
+  Float_t cov[6];
+  Float_t sigmaY2 = 0.027*cl->GetSigmaY2();
+  if (sector < fParam->GetNInnerSector()) sigmaY2 *= 2.07;
+  Float_t sigmaZ2 = 0.066*cl->GetSigmaZ2();
+  if (sector < fParam->GetNInnerSector()) sigmaZ2 *= 1.77;
+  cov[0] = sin*sin*sigmaY2;
+  cov[1] = -sin*cos*sigmaY2;
+  cov[2] = 0.;
+  cov[3] = cos*cos*sigmaY2;
+  cov[4] = 0.;
+  cov[5] = sigmaZ2;
+  p.SetXYZ(x,y,xyz[2],cov);
+  AliAlignObj::ELayerID iLayer;
+  Int_t idet;
+  if (sector < fParam->GetNInnerSector()) {
+    iLayer = AliAlignObj::kTPC1;
+    idet = sector;
+  }
+  else {
+    iLayer = AliAlignObj::kTPC2;
+    idet = sector - fParam->GetNInnerSector();
+  }
+  UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,idet);
+  p.SetVolumeID(volid);
+  return kTRUE;
+}
+
+
+
 Int_t AliTPCtrackerMI::UpdateClusters(AliTPCseed& t,  Int_t nr) {
   //-----------------------------------------------------------------
   // This function tries to find a track prolongation to next pad row
@@ -1646,14 +1646,14 @@ Int_t AliTPCtrackerMI::UpdateClusters(AliTPCseed& t,  Int_t nr) {
   Double_t  ymax= GetMaxY(nr);
 
   if (row < nr) return 1; // don't prolongate if not information until now -
-  if (TMath::Abs(t.GetSnp())>0.9 && t.GetNumberOfClusters()>40. && fIteration!=2) {
-    t.fRemoval =10;
-    return 0;  // not prolongate strongly inclined tracks
-  } 
-  if (TMath::Abs(t.GetSnp())>0.95) {
-    t.fRemoval =10;
-    return 0;  // not prolongate strongly inclined tracks
-  }
+//   if (TMath::Abs(t.GetSnp())>0.9 && t.GetNumberOfClusters()>40. && fIteration!=2) {
+//     t.fRemoval =10;
+//     return 0;  // not prolongate strongly inclined tracks
+//   } 
+//   if (TMath::Abs(t.GetSnp())>0.95) {
+//     t.fRemoval =10;
+//     return 0;  // not prolongate strongly inclined tracks
+//   }// patch 28 fev 06
 
   Double_t x= GetXrow(nr);
   Double_t y,z;
@@ -1683,7 +1683,13 @@ Int_t AliTPCtrackerMI::UpdateClusters(AliTPCseed& t,  Int_t nr) {
     //y = t.GetY();    
   }
   //
-
+  if (TMath::Abs(t.GetSnp())>AliTPCReconstructor::GetMaxSnpTracker()) return 0;
+  if (!IsActive(t.fRelativeSector,nr)) {
+    t.fInDead = kTRUE;
+    t.SetClusterIndex2(nr,-1); 
+    return 0;
+  }
+  //AliInfo(Form("A - Sector%d phi %f - alpha %f", t.fRelativeSector,y/x, t.GetAlpha()));
   AliTPCRow &krow=GetRow(t.fRelativeSector,nr);
 
   if (TMath::Abs(TMath::Abs(y)-ymax)<krow.fDeadZone){
@@ -1693,7 +1699,7 @@ Int_t AliTPCtrackerMI::UpdateClusters(AliTPCseed& t,  Int_t nr) {
   } 
   else
     {
-      if (TMath::Abs(t.GetZ())<(1.05*t.GetX()+10)) t.fNFoundable++;
+      if (TMath::Abs(t.GetZ())<(AliTPCReconstructor::GetCtgRange()*t.GetX()+10) && (TMath::Abs(t.GetSnp())<AliTPCReconstructor::GetMaxSnpTracker())) t.fNFoundable++;
       else
        return 0;      
     }
@@ -1706,7 +1712,7 @@ Int_t AliTPCtrackerMI::UpdateClusters(AliTPCseed& t,  Int_t nr) {
   }
     
   AliTPCclusterMI *cl=0;
-  UInt_t index=0;
+  Int_t index=0;
   //
   Double_t roady = 1.;
   Double_t roadz = 1.;
@@ -1725,12 +1731,15 @@ Int_t AliTPCtrackerMI::UpdateClusters(AliTPCseed& t,  Int_t nr) {
     }
   }
 
+  //  if (index<0) return 0;
+  UInt_t uindex = TMath::Abs(index);
+
   if (krow) {    
-    //cl = krow.FindNearest2(y+10,z,roady,roadz,index);      
-    cl = krow.FindNearest2(y,z,roady,roadz,index);      
+    //cl = krow.FindNearest2(y+10,z,roady,roadz,uindex);      
+    cl = krow.FindNearest2(y,z,roady,roadz,uindex);      
   }
 
-  if (cl) t.fCurrentClusterIndex1 = krow.GetIndex(index);   
+  if (cl) t.fCurrentClusterIndex1 = krow.GetIndex(uindex);   
   t.fCurrentCluster  = cl;
 
   return 1;
@@ -1789,7 +1798,31 @@ Int_t AliTPCtrackerMI::FollowProlongation(AliTPCseed& t, Int_t rf, Int_t step) {
   t.fRelativeSector = Int_t(alpha/fSectors->GetAlpha()+0.0001)%fN;
     
   Int_t first = GetRowNumber(xt)-1;
-  for (Int_t nr= first; nr>=rf; nr-=step) {    
+  for (Int_t nr= first; nr>=rf; nr-=step) {
+    // update kink info
+    if (t.GetKinkIndexes()[0]>0){
+      for (Int_t i=0;i<3;i++){
+       Int_t index = t.GetKinkIndexes()[i];
+       if (index==0) break;
+       if (index<0) continue;
+       //
+       AliESDkink * kink = fEvent->GetKink(index-1);
+       if (!kink){
+         printf("PROBLEM\n");
+       }
+       else{
+         Int_t kinkrow = kink->GetTPCRow0()+2+Int_t(0.5/(0.05+kink->GetAngle(2)));
+         if (kinkrow==nr){
+           AliExternalTrackParam paramd(t);
+           kink->SetDaughter(paramd);
+           kink->SetStatus(2,5);
+           kink->Update();
+         }
+       }
+      }
+    }
+
+    if (nr==80) t.UpdateReference();
     if (nr<fInnerSec->GetNRows()) 
       fSectors = fInnerSec;
     else
@@ -1832,18 +1865,41 @@ Int_t AliTPCtrackerMI::FollowBackProlongation(AliTPCseed& t, Int_t rf) {
   //-----------------------------------------------------------------
   // This function tries to find a track prolongation.
   //-----------------------------------------------------------------
-  //  Double_t xt=t.GetX();  
   //
+  Double_t xt=t.GetX();  
   Double_t alpha=t.GetAlpha() - fSectors->GetAlphaShift();
   if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();  
   if (alpha < 0.            ) alpha += 2.*TMath::Pi();  
   t.fRelativeSector = Int_t(alpha/fSectors->GetAlpha()+0.0001)%fN;
     
   Int_t first = t.fFirstPoint;
+  if (first<GetRowNumber(xt)+1) first = GetRowNumber(xt)+1;
   //
   if (first<0) first=0;
   for (Int_t nr=first; nr<=rf; nr++) {
-    //if ( (t.GetSnp()<0.9))
+    //    if ( (TMath::Abs(t.GetSnp())>0.95)) break;//patch 28 fev 06
+    if (t.GetKinkIndexes()[0]<0){
+      for (Int_t i=0;i<3;i++){
+       Int_t index = t.GetKinkIndexes()[i];
+       if (index==0) break;
+       if (index>0) continue;
+       index = TMath::Abs(index);
+       AliESDkink * kink = fEvent->GetKink(index-1);
+       if (!kink){
+         printf("PROBLEM\n");
+       }
+       else{
+         Int_t kinkrow = kink->GetTPCRow0()-2-Int_t(0.5/(0.05+kink->GetAngle(2)));
+         if (kinkrow==nr){
+           AliExternalTrackParam paramm(t);
+           kink->SetMother(paramm);
+           kink->SetStatus(2,1);
+           kink->Update();
+         }
+       }
+      }      
+    }
+    //
     if (nr<fInnerSec->GetNRows()) 
       fSectors = fInnerSec;
     else
@@ -2173,6 +2229,95 @@ void AliTPCtrackerMI::RemoveUsed(TObjArray * arr, Float_t factor1,  Float_t fact
   }
 }
 
+
+void AliTPCtrackerMI::RemoveUsed2(TObjArray * arr, Float_t factor1,  Float_t factor2, Int_t minimal)
+{
+
+  //Loop over all tracks and remove "overlaps"
+  //
+  //
+  UnsignClusters();
+  //
+  Int_t nseed = arr->GetEntriesFast();  
+  Float_t * quality = new Float_t[nseed];
+  Int_t   * indexes = new Int_t[nseed];
+  Int_t good =0;
+  //
+  //
+  for (Int_t i=0; i<nseed; i++) {
+    AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i);    
+    if (!pt){
+      quality[i]=-1;
+      continue;
+    }
+    pt->UpdatePoints();    //select first last max dens points
+    Float_t * points = pt->GetPoints();
+    if (points[3]<0.8) quality[i] =-1;
+    //
+    quality[i] = (points[2]-points[0])+pt->GetNumberOfClusters();
+  }
+  TMath::Sort(nseed,quality,indexes);
+  //
+  //
+  for (Int_t itrack=0; itrack<nseed; itrack++) {
+    Int_t trackindex = indexes[itrack];
+    AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(trackindex);    
+    if (quality[trackindex]<0){
+      if (pt) {
+       delete arr->RemoveAt(trackindex);
+      }
+      else{
+       arr->RemoveAt(trackindex);
+      }
+      continue;
+    }
+    //
+    Int_t first = Int_t(pt->GetPoints()[0]);
+    Int_t last  = Int_t(pt->GetPoints()[2]);
+    Double_t factor = (pt->fBConstrain) ? factor1: factor2;
+    //
+    Int_t found,foundable,shared;
+    pt->GetClusterStatistic(first,last, found, foundable,shared,kFALSE);
+    Float_t sharedfactor = Float_t(shared+1)/Float_t(found+1);
+    Bool_t itsgold =kFALSE;
+    if (pt->fEsd){
+      Int_t dummy[12];
+      if (pt->fEsd->GetITSclusters(dummy)>4) itsgold= kTRUE;
+    }
+    if (!itsgold){
+      //
+      if (Float_t(shared+1)/Float_t(found+1)>factor){
+       if (pt->GetKinkIndexes()[0]!=0) continue;  //don't remove tracks  - part of the kinks
+       delete arr->RemoveAt(trackindex);
+       continue;
+      }      
+      if (pt->GetNumberOfClusters()<50&&(found-0.5*shared)<minimal){  //remove short tracks
+       if (pt->GetKinkIndexes()[0]!=0) continue;  //don't remove tracks  - part of the kinks
+       delete arr->RemoveAt(trackindex);
+       continue;
+      }
+    }
+
+    good++;
+    if (sharedfactor>0.4) continue;
+    if (pt->GetKinkIndexes()[0]>0) continue;
+    for (Int_t i=first; i<last; i++) {
+      Int_t index=pt->GetClusterIndex2(i);
+      // if (index<0 || index&0x8000 ) continue;
+      if (index<0 || index&0x8000 ) continue;
+      AliTPCclusterMI *c= pt->fClusterPointer[i];        
+      if (!c) continue;
+      c->Use(10);  
+    }    
+  }
+  fNtracks = good;
+  if (fDebug>0){
+    Info("RemoveUsed","\n*****\nNumber of good tracks after shared removal\t%d\n",fNtracks);
+  }
+  delete []quality;
+  delete []indexes;
+}
+
 void AliTPCtrackerMI::UnsignClusters() 
 {
   //
@@ -2431,23 +2576,49 @@ Int_t AliTPCtrackerMI::RefitInward(AliESD *event)
   fIteration=2;
   //PrepareForProlongation(fSeeds,1);
   PropagateForward2(fSeeds);
+
   Int_t ntracks=0;
   Int_t nseed = fSeeds->GetEntriesFast();
   for (Int_t i=0;i<nseed;i++){
     AliTPCseed * seed = (AliTPCseed*) fSeeds->UncheckedAt(i);
     if (!seed) continue;
+    if (seed->GetKinkIndex(0)>0)  UpdateKinkQualityD(seed);  // update quality informations for kinks
+
     seed->PropagateTo(fParam->GetInnerRadiusLow());
+    seed->UpdatePoints();
     AliESDtrack *esd=event->GetTrack(i);
     seed->CookdEdx(0.02,0.6);
     CookLabel(seed,0.1); //For comparison only
-    if (seed->GetNumberOfClusters()>60){
+    //
+    if (AliTPCReconstructor::StreamLevel()>0 && seed!=0&&esd!=0) {
+      TTreeSRedirector &cstream = *fDebugStreamer;
+      cstream<<"Crefit"<<
+       "Esd.="<<esd<<
+       "Track.="<<seed<<
+       "\n"; 
+    }
+    if (seed->GetNumberOfClusters()>15){
       esd->UpdateTrackParams(seed,AliESDtrack::kTPCrefit); 
+      esd->SetTPCPoints(seed->GetPoints());
+      esd->SetTPCPointsF(seed->fNFoundable);
+      Int_t ndedx   = seed->fNCDEDX[0]+seed->fNCDEDX[1]+seed->fNCDEDX[2]+seed->fNCDEDX[3];
+      Float_t sdedx = (seed->fSDEDX[0]+seed->fSDEDX[1]+seed->fSDEDX[2]+seed->fSDEDX[3])*0.25;
+      Float_t dedx  = seed->GetdEdx();
+      esd->SetTPCsignal(dedx, sdedx, ndedx);
+      //
+      // add seed to the esd track in Calib level
+      //
+      if (AliTPCReconstructor::StreamLevel()>0){
+       AliTPCseed * seedCopy = new AliTPCseed(*seed, kTRUE); 
+       esd->AddCalibObject(seedCopy);
+      }
       ntracks++;
     }
     else{
       //printf("problem\n");
     }
   }
+  //FindKinks(fSeeds,event);
   Info("RefitInward","Number of refitted tracks %d",ntracks);
   fEvent =0;
   //WriteTracks();
@@ -2463,21 +2634,37 @@ Int_t AliTPCtrackerMI::PropagateBack(AliESD *event)
 
   fEvent = event;
   fIteration = 1;
-  ReadSeeds(event,0);
-  PropagateBack(fSeeds);
+  ReadSeeds(event,1);
+  PropagateBack(fSeeds); 
+  RemoveUsed2(fSeeds,0.4,0.4,20);
+  //
   Int_t nseed = fSeeds->GetEntriesFast();
   Int_t ntracks=0;
   for (Int_t i=0;i<nseed;i++){
     AliTPCseed * seed = (AliTPCseed*) fSeeds->UncheckedAt(i);
     if (!seed) continue;
+    if (seed->GetKinkIndex(0)<0)  UpdateKinkQualityM(seed);  // update quality informations for kinks
+    seed->UpdatePoints();
     AliESDtrack *esd=event->GetTrack(i);
     seed->CookdEdx(0.02,0.6);
     CookLabel(seed,0.1); //For comparison only
-    if (seed->GetNumberOfClusters()>60){
+    if (seed->GetNumberOfClusters()>15){
       esd->UpdateTrackParams(seed,AliESDtrack::kTPCout);
+      esd->SetTPCPoints(seed->GetPoints());
+      esd->SetTPCPointsF(seed->fNFoundable);
+      Int_t ndedx   = seed->fNCDEDX[0]+seed->fNCDEDX[1]+seed->fNCDEDX[2]+seed->fNCDEDX[3];
+      Float_t sdedx = (seed->fSDEDX[0]+seed->fSDEDX[1]+seed->fSDEDX[2]+seed->fSDEDX[3])*0.25;
+      Float_t dedx  = seed->GetdEdx();
+      esd->SetTPCsignal(dedx, sdedx, ndedx);
       ntracks++;
+      Int_t eventnumber = event->GetEventNumber();// patch 28 fev 06
+      (*fDebugStreamer)<<"Cback"<<
+       "Tr0.="<<seed<<
+       "EventNr="<<eventnumber<<
+       "\n"; // patch 28 fev 06   
     }
   }
+  //FindKinks(fSeeds,event);
   Info("PropagateBack","Number of back propagated tracks %d",ntracks);
   fEvent =0;
   //WriteTracks();
@@ -2516,10 +2703,29 @@ void AliTPCtrackerMI::ReadSeeds(AliESD *event, Int_t direction)
   //  Int_t ntrk=0;  
   for (Int_t i=0; i<nentr; i++) {
     AliESDtrack *esd=event->GetTrack(i);
-    ULong_t status=esd->GetStatus();    
+    ULong_t status=esd->GetStatus();
+    if (!(status&AliESDtrack::kTPCin)) continue;
     AliTPCtrack t(*esd);
-    AliTPCseed *seed = new AliTPCseed(t,t.GetAlpha());
-    if ((status==AliESDtrack::kTPCin)&&(direction==1)) seed->ResetCovariance(); 
+    t.SetNumberOfClusters(0);
+    //    AliTPCseed *seed = new AliTPCseed(t,t.GetAlpha());
+    AliTPCseed *seed = new AliTPCseed(t/*,t.GetAlpha()*/);
+    for (Int_t ikink=0;ikink<3;ikink++) {
+      Int_t index = esd->GetKinkIndex(ikink);
+      seed->GetKinkIndexes()[ikink] = index;
+      if (index==0) continue;
+      index = TMath::Abs(index);
+      AliESDkink * kink = fEvent->GetKink(index-1);
+      if (kink&&esd->GetKinkIndex(ikink)<0){
+       if ((status & AliESDtrack::kTRDrefit) != 0) kink->SetStatus(1,2);
+       if ((status & AliESDtrack::kITSout) != 0)   kink->SetStatus(1,0);
+      }
+      if (kink&&esd->GetKinkIndex(ikink)>0){
+       if ((status & AliESDtrack::kTRDrefit) != 0) kink->SetStatus(1,6);
+       if ((status & AliESDtrack::kITSout) != 0)   kink->SetStatus(1,4);
+      }
+
+    }
+    if (((status&AliESDtrack::kITSout)==0)&&(direction==1)) seed->ResetCovariance(); 
     if ( direction ==2 &&(status & AliESDtrack::kTRDrefit) == 0 ) seed->ResetCovariance();
     if ( direction ==2 && ((status & AliESDtrack::kTPCout) == 0) ) {
       fSeeds->AddAt(0,i);
@@ -2527,22 +2733,23 @@ void AliTPCtrackerMI::ReadSeeds(AliESD *event, Int_t direction)
       continue;    
     }
     if ( direction ==2 &&(status & AliESDtrack::kTRDrefit) > 0 )  {
-      Double_t par0[5],par1[5],x;
-      esd->GetInnerExternalParameters(x,par0);
+      Double_t par0[5],par1[5],alpha,x;
+      esd->GetInnerExternalParameters(alpha,x,par0);
       esd->GetExternalParameters(x,par1);
       Double_t delta1 = TMath::Abs(par0[4]-par1[4])/(0.000000001+TMath::Abs(par0[4]+par1[4]));
       Double_t delta2 = TMath::Abs(par0[3]-par1[3]);
+      Double_t trdchi2=0;
+      if (esd->GetTRDncls()>0) trdchi2 = esd->GetTRDchi2()/esd->GetTRDncls();
       //reset covariance if suspicious 
-      if ( (delta1>0.1) || (delta2>0.006))
+      if ( (delta1>0.1) || (delta2>0.006) ||trdchi2>7.)
        seed->ResetCovariance();
     }
 
     //
     //
     // rotate to the local coordinate system
-   
-    fSectors=fInnerSec; fN=fkNIS;
-    
+    //   
+    fSectors=fInnerSec; fN=fkNIS;    
     Double_t alpha=seed->GetAlpha() - fSectors->GetAlphaShift();
     if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
     if (alpha < 0.            ) alpha += 2.*TMath::Pi();
@@ -2556,34 +2763,23 @@ void AliTPCtrackerMI::ReadSeeds(AliESD *event, Int_t direction)
       continue;
     }
     seed->fEsd = esd;
-    //
-    //seed->PropagateTo(fSectors->GetX(0));
-    //
-    //    Int_t index = esd->GetTPCindex();
-    //AliTPCseed * seed2= (AliTPCseed*)fSeeds->At(index);
-    //if (direction==2){
-    //  AliTPCseed * seed2  = ReSeed(seed,0.,0.5,1.);
-    //  if (seed2) {
-    // delete seed;
-    // seed = seed2;
-    //  }
-    //}
-    //
     // sign clusters
-    for (Int_t irow=0;irow<160;irow++){
-      Int_t index = seed->GetClusterIndex2(irow);    
-      if (index>0){ 
-       //
-       AliTPCclusterMI * cl = GetClusterMI(index);
-       seed->fClusterPointer[irow] = cl;
-       if (cl){
-         if ((index & 0x8000)==0){
-           cl->Use(10);  // accepted cluster     
+    if (esd->GetKinkIndex(0)<=0){
+      for (Int_t irow=0;irow<160;irow++){
+       Int_t index = seed->GetClusterIndex2(irow);    
+       if (index>0){ 
+         //
+         AliTPCclusterMI * cl = GetClusterMI(index);
+         seed->fClusterPointer[irow] = cl;
+         if (cl){
+           if ((index & 0x8000)==0){
+             cl->Use(10);  // accepted cluster   
+           }else{
+             cl->Use(6);   // close cluster not accepted
+           }   
          }else{
-           cl->Use(6);   // close cluster not accepted
-         }     
-       }else{
-          Info("ReadSeeds","Not found cluster");
+           Info("ReadSeeds","Not found cluster");
+         }
        }
       }
     }
@@ -3435,15 +3631,14 @@ AliTPCseed *AliTPCtrackerMI::MakeSeed(AliTPCseed *track, Float_t r0, Float_t r1,
   Int_t p2 = int(r2*track->GetNumberOfClusters());   // last point
   Int_t pp2=0;
   Double_t  x0[3],x1[3],x2[3];
-  x0[0]=-1;
-  x0[0]=-1;
-  x0[0]=-1;
+  for (Int_t i=0;i<3;i++){
+    x0[i]=-1;
+    x1[i]=-1;
+    x2[i]=-1;
+  }
 
   // find track position at given ratio of the length
-  Int_t  sec0, sec1, sec2;
-  sec0=0;
-  sec1=0;
-  sec2=0;
+  Int_t  sec0=0, sec1=0, sec2=0;
   Int_t index=-1;
   Int_t clindex;
   for (Int_t i=0;i<160;i++){
@@ -3670,253 +3865,1487 @@ AliTPCseed *AliTPCtrackerMI::ReSeed(AliTPCseed *track, Float_t r0, Float_t r1, F
   return seed;
 }
 
-Int_t  AliTPCtrackerMI::CheckKinkPoint(AliTPCseed*seed, Float_t th)
+
+AliTPCseed *AliTPCtrackerMI::ReSeed(AliTPCseed *track,Int_t r0, Bool_t forward)
 {
   //
   //
+  //reseed using founded clusters 
+  //
+  Double_t  xyz[3][3];
+  Int_t     row[3]={0,0,0};
+  Int_t     sec[3]={0,0,0};
+  //
+  // forward direction
+  if (forward){
+    for (Int_t irow=r0;irow<160;irow++){
+      if (track->GetClusterIndex(irow)>0){
+       row[0] = irow;
+       break;
+      }
+    }
+    for (Int_t irow=160;irow>r0;irow--){
+      if (track->GetClusterIndex(irow)>0){
+       row[2] = irow;
+       break;
+      }
+    }
+    for (Int_t irow=row[2]-15;irow>row[0];irow--){
+      if (track->GetClusterIndex(irow)>0){
+       row[1] = irow;
+       break;
+      }
+    }
+    //
+  }
+  if (!forward){
+    for (Int_t irow=0;irow<r0;irow++){
+      if (track->GetClusterIndex(irow)>0){
+       row[0] = irow;
+       break;
+      }
+    }
+    for (Int_t irow=r0;irow>0;irow--){
+      if (track->GetClusterIndex(irow)>0){
+       row[2] = irow;
+       break;
+      }
+    }    
+    for (Int_t irow=row[2]-15;irow>row[0];irow--){
+      if (track->GetClusterIndex(irow)>0){
+       row[1] = irow;
+       break;
+      }
+    } 
+  }
+  //
+  if ((row[2]-row[0])<20) return 0;
+  if (row[1]==0) return 0;
+  //
+  //
+  //Get cluster and sector position
+  for (Int_t ipoint=0;ipoint<3;ipoint++){
+    Int_t clindex = track->GetClusterIndex2(row[ipoint]);
+    AliTPCclusterMI * cl = GetClusterMI(clindex);
+    if (cl==0) {
+      //Error("Bug\n");
+      //      AliTPCclusterMI * cl = GetClusterMI(clindex);
+      return 0;
+    }
+    sec[ipoint]     = ((clindex&0xff000000)>>24)%18;
+    xyz[ipoint][0]  = GetXrow(row[ipoint]);
+    AliTPCTrackerPoint * point = track->GetTrackPoint(row[ipoint]);    
+    if (point&&ipoint<2){
+      //
+       xyz[ipoint][1]  = point->GetY();
+       xyz[ipoint][2]  = point->GetZ();
+    }
+    else{
+      xyz[ipoint][1]  = cl->GetY();
+      xyz[ipoint][2]  = cl->GetZ();
+    }
+  }
+  //
+  //
+  //
+  //
+  // Calculate seed state vector and covariance matrix
+
+  Double_t alpha, cs,sn, xx2,yy2;
+  //
+  alpha = (sec[1]-sec[2])*fSectors->GetAlpha();
+  cs = TMath::Cos(alpha);
+  sn = TMath::Sin(alpha); 
+  xx2= xyz[1][0]*cs-xyz[1][1]*sn;
+  yy2= xyz[1][0]*sn+xyz[1][1]*cs;
+  xyz[1][0] = xx2;
+  xyz[1][1] = yy2;
+  //
+  alpha = (sec[0]-sec[2])*fSectors->GetAlpha();
+  cs = TMath::Cos(alpha);
+  sn = TMath::Sin(alpha); 
+  xx2= xyz[0][0]*cs-xyz[0][1]*sn;
+  yy2= xyz[0][0]*sn+xyz[0][1]*cs;
+  xyz[0][0] = xx2;
+  xyz[0][1] = yy2;
+  //
+  //
+  //
+  Double_t x[5],c[15];
+  //
+  x[0]=xyz[2][1];
+  x[1]=xyz[2][2];
+  x[4]=F1(xyz[2][0],xyz[2][1],xyz[1][0],xyz[1][1],xyz[0][0],xyz[0][1]);
+  x[2]=F2(xyz[2][0],xyz[2][1],xyz[1][0],xyz[1][1],xyz[0][0],xyz[0][1]);
+  x[3]=F3n(xyz[2][0],xyz[2][1],xyz[0][0],xyz[0][1],xyz[2][2],xyz[0][2],x[4]);
+  //  
+  Double_t sy =0.1,  sz =0.1;
+  //
+  Double_t sy1=0.2, sz1=0.2;
+  Double_t sy2=0.2, sz2=0.2;
+  Double_t sy3=0.2;
+  //
+  Double_t f40=(F1(xyz[2][0],xyz[2][1]+sy,xyz[1][0],xyz[1][1],xyz[0][0],xyz[0][1])-x[4])/sy;
+  Double_t f42=(F1(xyz[2][0],xyz[2][1],xyz[1][0],xyz[1][1]+sy,xyz[0][0],xyz[0][1])-x[4])/sy;
+  Double_t f43=(F1(xyz[2][0],xyz[2][1],xyz[1][0],xyz[1][1],xyz[0][0],xyz[0][1]+sy)-x[4])/sy;
+  Double_t f20=(F2(xyz[2][0],xyz[2][1]+sy,xyz[1][0],xyz[1][1],xyz[0][0],xyz[0][1])-x[2])/sy;
+  Double_t f22=(F2(xyz[2][0],xyz[2][1],xyz[1][0],xyz[1][1]+sy,xyz[0][0],xyz[0][1])-x[2])/sy;
+  Double_t f23=(F2(xyz[2][0],xyz[2][1],xyz[1][0],xyz[1][1],xyz[0][0],xyz[0][1]+sy)-x[2])/sy;
+  //
+  Double_t f30=(F3(xyz[2][0],xyz[2][1]+sy,xyz[0][0],xyz[0][1],xyz[2][2],xyz[0][2])-x[3])/sy;
+  Double_t f31=(F3(xyz[2][0],xyz[2][1],xyz[0][0],xyz[0][1],xyz[2][2]+sz,xyz[0][2])-x[3])/sz;
+  Double_t f32=(F3(xyz[2][0],xyz[2][1],xyz[0][0],xyz[0][1]+sy,xyz[2][2],xyz[0][2])-x[3])/sy;
+  Double_t f34=(F3(xyz[2][0],xyz[2][1],xyz[0][0],xyz[0][1],xyz[2][2],xyz[0][2]+sz)-x[3])/sz;
+  
+  
+  c[0]=sy1;
+  c[1]=0.;       c[2]=sz1;
+  c[3]=f20*sy1;  c[4]=0.;       c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
+  c[6]=f30*sy1;  c[7]=f31*sz1;  c[8]=f30*sy1*f20+f32*sy2*f22;
+  c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
+  c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
+  c[13]=f30*sy1*f40+f32*sy2*f42;
+  c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
+  
+  //  Int_t row1 = fSectors->GetRowNumber(xyz[2][0]);
+  AliTPCseed *seed=new  AliTPCseed(0, x, c, xyz[2][0], sec[2]*fSectors->GetAlpha()+fSectors->GetAlphaShift());
+  seed->fLastPoint  = row[2];
+  seed->fFirstPoint = row[2];  
+  for (Int_t i=row[0];i<row[2];i++){
+    seed->fIndex[i] = track->fIndex[i];
+  }
+
+  return seed;
+}
+
+void  AliTPCtrackerMI::FindKinks(TObjArray * array, AliESD *esd)
+{
+  //
+  //  find kinks
+  //
+  //
+
+  TObjArray *kinks= new TObjArray(10000);
+  //  TObjArray *v0s= new TObjArray(10000);
+  Int_t nentries = array->GetEntriesFast();
+  AliHelix *helixes      = new AliHelix[nentries];
+  Int_t    *sign         = new Int_t[nentries];
+  Int_t    *nclusters    = new Int_t[nentries];
+  Float_t  *alpha        = new Float_t[nentries];
+  AliESDkink * kink      = new AliESDkink();
+  Int_t      * usage     = new Int_t[nentries];
+  Float_t  *zm           = new Float_t[nentries];
+  Float_t  *z0           = new Float_t[nentries]; 
+  Float_t  *fim          = new Float_t[nentries];
+  Float_t  *shared       = new Float_t[nentries];
+  Bool_t   *circular     = new Bool_t[nentries];
+  Float_t *dca          = new Float_t[nentries];
+  //const AliESDVertex * primvertex = esd->GetVertex();
+  //
+  //  nentries = array->GetEntriesFast();
+  //
+  
+  //
+  //
+  for (Int_t i=0;i<nentries;i++){
+    sign[i]=0;
+    usage[i]=0;
+    AliTPCseed* track = (AliTPCseed*)array->At(i);    
+    if (!track) continue;
+    track->fCircular =0;
+    shared[i] = kFALSE;
+    track->UpdatePoints();
+    if (( track->GetPoints()[2]- track->GetPoints()[0])>5 && track->GetPoints()[3]>0.8){
+    }
+    nclusters[i]=track->GetNumberOfClusters();
+    alpha[i] = track->GetAlpha();
+    new (&helixes[i]) AliHelix(*track);
+    Double_t xyz[3];
+    helixes[i].Evaluate(0,xyz);
+    sign[i] = (track->GetC()>0) ? -1:1;
+    Double_t x,y,z;
+    x=160;
+    if (track->GetProlongation(x,y,z)){
+      zm[i]  = z;
+      fim[i] = alpha[i]+TMath::ATan2(y,x);
+    }
+    else{
+      zm[i]  = track->GetZ();
+      fim[i] = alpha[i];
+    }   
+    z0[i]=1000;
+    circular[i]= kFALSE;
+    if (track->GetProlongation(0,y,z))  z0[i] = z;
+    dca[i] = track->GetD(0,0);    
+  }
+  //
+  //
+  TStopwatch timer;
+  timer.Start();
+  Int_t ncandidates =0;
+  Int_t nall =0;
+  Int_t ntracks=0; 
+  Double_t phase[2][2],radius[2];
+
+  //
+  // Find circling track
+  TTreeSRedirector &cstream = *fDebugStreamer;
+  //
+  for (Int_t i0=0;i0<nentries;i0++){
+    AliTPCseed * track0 = (AliTPCseed*)array->At(i0);
+    if (!track0) continue;    
+    if (track0->fN<40) continue;
+    if (TMath::Abs(1./track0->fP4)>200) continue;
+    for (Int_t i1=i0+1;i1<nentries;i1++){
+      AliTPCseed * track1 = (AliTPCseed*)array->At(i1);
+      if (!track1) continue;
+      if (track1->fN<40)                  continue;
+      if ( TMath::Abs(track1->fP3+track0->fP3)>0.1) continue;
+      if (track0->fBConstrain&&track1->fBConstrain) continue;
+      if (TMath::Abs(1./track1->fP4)>200) continue;
+      if (track1->fP4*track0->fP4>0)      continue;
+      if (track1->fP3*track0->fP3>0)      continue;
+      if (max(TMath::Abs(1./track0->fP4),TMath::Abs(1./track1->fP4))>190) continue;
+      if (track0->fBConstrain&&TMath::Abs(track1->fP4)<TMath::Abs(track0->fP4)) continue; //returning - lower momenta
+      if (track1->fBConstrain&&TMath::Abs(track0->fP4)<TMath::Abs(track1->fP4)) continue; //returning - lower momenta
+      //
+      Float_t mindcar = TMath::Min(TMath::Abs(dca[i0]),TMath::Abs(dca[i1]));
+      if (mindcar<5)   continue;
+      Float_t mindcaz = TMath::Min(TMath::Abs(z0[i0]-GetZ()),TMath::Abs(z0[i1]-GetZ()));
+      if (mindcaz<5) continue;
+      if (mindcar+mindcaz<20) continue;
+      //
+      //
+      Float_t xc0 = helixes[i0].GetHelix(6);
+      Float_t yc0 = helixes[i0].GetHelix(7);
+      Float_t r0  = helixes[i0].GetHelix(8);
+      Float_t xc1 = helixes[i1].GetHelix(6);
+      Float_t yc1 = helixes[i1].GetHelix(7);
+      Float_t r1  = helixes[i1].GetHelix(8);
+       
+      Float_t rmean = (r0+r1)*0.5;
+      Float_t delta =TMath::Sqrt((xc1-xc0)*(xc1-xc0)+(yc1-yc0)*(yc1-yc0));
+      //if (delta>30) continue;
+      if (delta>rmean*0.25) continue;
+      if (TMath::Abs(r0-r1)/rmean>0.3) continue; 
+      //
+      Int_t npoints = helixes[i0].GetRPHIintersections(helixes[i1], phase, radius,10);
+      if (npoints==0) continue;
+      helixes[i0].GetClosestPhases(helixes[i1], phase);
+      //
+      Double_t xyz0[3];
+      Double_t xyz1[3];
+      Double_t hangles[3];
+      helixes[i0].Evaluate(phase[0][0],xyz0);
+      helixes[i1].Evaluate(phase[0][1],xyz1);
+
+      helixes[i0].GetAngle(phase[0][0],helixes[i1],phase[0][1],hangles);
+      Double_t deltah[2],deltabest;
+      if (hangles[2]<2.8) continue;
+      /*
+      cstream<<"C"<<track0->fLab<<track1->fLab<<
+       track0->fP3<<track1->fP3<<
+       track0->fP4<<track1->fP4<<
+       delta<<rmean<<npoints<<
+       hangles[0]<<hangles[2]<<
+       xyz0[2]<<xyz1[2]<<radius[0]<<"\n"; 
+      */
+      if (npoints>0){
+       Int_t ibest=0;
+       helixes[i0].ParabolicDCA(helixes[i1],phase[0][0],phase[0][1],radius[0],deltah[0],2);
+       if (npoints==2){
+         helixes[i0].ParabolicDCA(helixes[i1],phase[1][0],phase[1][1],radius[1],deltah[1],2);
+         if (deltah[1]<deltah[0]) ibest=1;
+       }
+       deltabest  = TMath::Sqrt(deltah[ibest]);
+       helixes[i0].Evaluate(phase[ibest][0],xyz0);
+       helixes[i1].Evaluate(phase[ibest][1],xyz1);
+       helixes[i0].GetAngle(phase[ibest][0],helixes[i1],phase[ibest][1],hangles);
+       Double_t radiusbest = TMath::Sqrt(radius[ibest]);
+       //
+       if (deltabest>6) continue;
+       if (mindcar+mindcaz<40 && (hangles[2]<3.12||deltabest>3)) continue;
+       Bool_t sign =kFALSE;
+       if (hangles[2]>3.06) sign =kTRUE;
+       //
+       if (sign){
+         circular[i0] = kTRUE;
+         circular[i1] = kTRUE;
+         if (TMath::Abs(track0->fP4)<TMath::Abs(track1->fP4)){
+           track0->fCircular += 1;
+           track1->fCircular += 2;
+         }
+         else{
+           track1->fCircular += 1;
+           track0->fCircular += 2;
+         }
+       }               
+       if (sign&&AliTPCReconstructor::StreamLevel()>1){          
+         //debug stream          
+         cstream<<"Curling"<<
+           "lab0="<<track0->fLab<<
+           "lab1="<<track1->fLab<<   
+           "Tr0.="<<track0<<
+           "Tr1.="<<track1<<      
+           "dca0="<<dca[i0]<<
+           "dca1="<<dca[i1]<<
+           "mindcar="<<mindcar<<
+           "mindcaz="<<mindcaz<<
+           "delta="<<delta<<
+           "rmean="<<rmean<<
+           "npoints="<<npoints<<                      
+           "hangles0="<<hangles[0]<<
+           "hangles2="<<hangles[2]<<                    
+           "xyz0="<<xyz0[2]<<
+           "xyzz1="<<xyz1[2]<<
+           "z0="<<z0[i0]<<
+           "z1="<<z0[i1]<<
+           "radius="<<radiusbest<<
+           "deltabest="<<deltabest<< 
+           "phase0="<<phase[ibest][0]<<
+           "phase1="<<phase[ibest][1]<<
+           "\n";                 
+       }
+      }
+    }
+  }
+  //
+  //  Finf kinks loop
   // 
-  for (Int_t i=0;i<12;i++) seed->fKinkPoint[i]=0;
-  //
-  if (TMath::Abs(seed->GetC())>0.01) return 0;
-  //
-
-  Float_t x[160], y[160], erry[160], z[160], errz[160];
-  Int_t sec[160];
-  Float_t xt[160], yt[160], zt[160];
-  Int_t i1 = 200;
-  Int_t i2 = 0;
-  Int_t secm   = -1;
-  Int_t padm   = -1;
-  Int_t middle = seed->GetNumberOfClusters()/2;
-  //
-  //
-  // find central sector, get local cooordinates
-  Int_t count = 0;
-  for (Int_t i=seed->fFirstPoint;i<=seed->fLastPoint;i++) {
-    sec[i]= seed->GetClusterSector(i)%18;
-    x[i]  = GetXrow(i);  
-    if (sec[i]>=0) {
-      AliTPCclusterMI * cl = seed->fClusterPointer[i];
-      //      if (cl==0)        cl = GetClusterMI(seed->GetClusterIndex2(i));
-      if (cl==0) {
-       sec[i] = -1;
-       continue;
+  //
+  for (Int_t i =0;i<nentries;i++){
+    if (sign[i]==0) continue;
+    AliTPCseed * track0 = (AliTPCseed*)array->At(i);
+    ntracks++;
+    //
+    Double_t cradius0 = 40*40;
+    Double_t cradius1 = 270*270;
+    Double_t cdist1=8.;
+    Double_t cdist2=8.;
+    Double_t cdist3=0.55; 
+    for (Int_t j =i+1;j<nentries;j++){
+      nall++;
+      if (sign[j]*sign[i]<1) continue;
+      if ( (nclusters[i]+nclusters[j])>200) continue;
+      if ( (nclusters[i]+nclusters[j])<80) continue;
+      if ( TMath::Abs(zm[i]-zm[j])>60.) continue;
+      if ( TMath::Abs(fim[i]-fim[j])>0.6 && TMath::Abs(fim[i]-fim[j])<5.7 ) continue;
+      //AliTPCseed * track1 = (AliTPCseed*)array->At(j);  Double_t phase[2][2],radius[2];    
+      Int_t npoints = helixes[i].GetRPHIintersections(helixes[j], phase, radius,20);
+      if (npoints<1) continue;
+      // cuts on radius      
+      if (npoints==1){
+       if (radius[0]<cradius0||radius[0]>cradius1) continue;
+      }
+      else{
+       if ( (radius[0]<cradius0||radius[0]>cradius1) && (radius[1]<cradius0||radius[1]>cradius1) ) continue;
+      }
+      //      
+      Double_t delta1=10000,delta2=10000;
+      // cuts on the intersection radius
+      helixes[i].LinearDCA(helixes[j],phase[0][0],phase[0][1],radius[0],delta1);
+      if (radius[0]<20&&delta1<1) continue; //intersection at vertex
+      if (radius[0]<10&&delta1<3) continue; //intersection at vertex
+      if (npoints==2){ 
+       helixes[i].LinearDCA(helixes[j],phase[1][0],phase[1][1],radius[1],delta2);
+       if (radius[1]<20&&delta2<1) continue;  //intersection at vertex
+       if (radius[1]<10&&delta2<3) continue;  //intersection at vertex 
       }
       //
+      Double_t distance1 = TMath::Min(delta1,delta2);
+      if (distance1>cdist1) continue;  // cut on DCA linear approximation
       //
-      if (i>i2)  i2 = i;  //last  point with cluster
-      if (i2<i1) i1 = i;  //first point with cluster
-      y[i] = cl->GetY();
-      z[i] = cl->GetZ();
-      AliTPCTrackerPoint * point = seed->GetTrackPoint(i);
-      xt[i] = x[i];
-      yt[i] = point->GetY();
-      zt[i] = point->GetZ();
-  
-      if (point->GetX()>0){
-       erry[i] = point->GetErrY();
-       errz[i] = point->GetErrZ();     
+      npoints = helixes[i].GetRPHIintersections(helixes[j], phase, radius,20);
+      helixes[i].ParabolicDCA(helixes[j],phase[0][0],phase[0][1],radius[0],delta1);
+      if (radius[0]<20&&delta1<1) continue; //intersection at vertex
+      if (radius[0]<10&&delta1<3) continue; //intersection at vertex
+      //
+      if (npoints==2){ 
+       helixes[i].ParabolicDCA(helixes[j],phase[1][0],phase[1][1],radius[1],delta2);   
+       if (radius[1]<20&&delta2<1) continue;  //intersection at vertex
+       if (radius[1]<10&&delta2<3) continue;  //intersection at vertex 
+      }            
+      distance1 = TMath::Min(delta1,delta2);
+      Float_t rkink =0;
+      if (delta1<delta2){
+       rkink = TMath::Sqrt(radius[0]);
+      }
+      else{
+       rkink = TMath::Sqrt(radius[1]);
+      }
+      if (distance1>cdist2) continue;
+      //
+      //
+      AliTPCseed * track1 = (AliTPCseed*)array->At(j);
+      //
+      //
+      Int_t row0 = GetRowNumber(rkink); 
+      if (row0<10)  continue;
+      if (row0>150) continue;
+      //
+      //
+      Float_t dens00=-1,dens01=-1;
+      Float_t dens10=-1,dens11=-1;
+      //
+      Int_t found,foundable,shared;
+      track0->GetClusterStatistic(0,row0-5, found, foundable,shared,kFALSE);
+      if (foundable>5) dens00 = Float_t(found)/Float_t(foundable);
+      track0->GetClusterStatistic(row0+5,155, found, foundable,shared,kFALSE);
+      if (foundable>5) dens01 = Float_t(found)/Float_t(foundable);
+      //
+      track1->GetClusterStatistic(0,row0-5, found, foundable,shared,kFALSE);
+      if (foundable>10) dens10 = Float_t(found)/Float_t(foundable);
+      track1->GetClusterStatistic(row0+5,155, found, foundable,shared,kFALSE);
+      if (foundable>10) dens11 = Float_t(found)/Float_t(foundable);
+      //     
+      if (dens00<dens10 && dens01<dens11) continue;
+      if (dens00>dens10 && dens01>dens11) continue;
+      if (TMath::Max(dens00,dens10)<0.1)  continue;
+      if (TMath::Max(dens01,dens11)<0.3)  continue;
+      //
+      if (TMath::Min(dens00,dens10)>0.6)  continue;
+      if (TMath::Min(dens01,dens11)>0.6)  continue;
+
+      //
+      AliTPCseed * ktrack0, *ktrack1;
+      if (dens00>dens10){
+       ktrack0 = track0;
+       ktrack1 = track1;
+      }
+      else{
+       ktrack0 = track1;
+       ktrack1 = track0;
+      }
+      if (TMath::Abs(ktrack0->GetC())>5) continue; // cut on the curvature for mother particle
+      AliExternalTrackParam paramm(*ktrack0);
+      AliExternalTrackParam paramd(*ktrack1);
+      if (row0>60&&ktrack1->GetReference().GetX()>90.) new (&paramd) AliExternalTrackParam(ktrack1->GetReference()); 
+      //
+      //
+      kink->SetMother(paramm);
+      kink->SetDaughter(paramd);
+      kink->Update();
+
+      Float_t x[3] = { kink->GetPosition()[0],kink->GetPosition()[1],kink->GetPosition()[2]};
+      Int_t index[4];
+      fParam->Transform0to1(x,index);
+      fParam->Transform1to2(x,index);
+      row0 = GetRowNumber(x[0]); 
+
+      if (kink->GetR()<100) continue;
+      if (kink->GetR()>240) continue;
+      if (kink->GetPosition()[2]/kink->GetR()>AliTPCReconstructor::GetCtgRange()) continue;  //out of fiducial volume
+      if (kink->GetDistance()>cdist3) continue;
+      Float_t dird = kink->GetDaughterP()[0]*kink->GetPosition()[0]+kink->GetDaughterP()[1]*kink->GetPosition()[1];  // rough direction estimate
+      if (dird<0) continue;
+
+      Float_t dirm = kink->GetMotherP()[0]*kink->GetPosition()[0]+kink->GetMotherP()[1]*kink->GetPosition()[1];  // rough direction estimate
+      if (dirm<0) continue;
+      Float_t mpt = TMath::Sqrt(kink->GetMotherP()[0]*kink->GetMotherP()[0]+kink->GetMotherP()[1]*kink->GetMotherP()[1]);
+      if (mpt<0.2) continue;
+
+      if (mpt<1){
+       //for high momenta momentum not defined well in first iteration
+       Double_t qt   =  TMath::Sin(kink->GetAngle(2))*ktrack1->P();
+       if (qt>0.35) continue; 
+      }
+      
+      kink->SetLabel(CookLabel(ktrack0,0.4,0,row0),0);
+      kink->SetLabel(CookLabel(ktrack1,0.4,row0,160),1);
+      if (dens00>dens10){
+       kink->SetTPCDensity(dens00,0,0);
+       kink->SetTPCDensity(dens01,0,1);
+       kink->SetTPCDensity(dens10,1,0);
+       kink->SetTPCDensity(dens11,1,1);
+       kink->SetIndex(i,0);
+       kink->SetIndex(j,1);
+      }
+      else{
+       kink->SetTPCDensity(dens10,0,0);
+       kink->SetTPCDensity(dens11,0,1);
+       kink->SetTPCDensity(dens00,1,0);
+       kink->SetTPCDensity(dens01,1,1);
+       kink->SetIndex(j,0);
+       kink->SetIndex(i,1);
       }
 
-      count++;
-      if (count<middle) {
-       secm = sec[i];  //central sector
-       padm = i;       //middle point with cluster
+      if (mpt<1||kink->GetAngle(2)>0.1){
+       //      angle and densities  not defined yet
+       if (kink->GetTPCDensityFactor()<0.8) continue;
+       if ((2-kink->GetTPCDensityFactor())*kink->GetDistance() >0.25) continue;
+       if (kink->GetAngle(2)*ktrack0->P()<0.003) continue; //too small angle
+       if (kink->GetAngle(2)>0.2&&kink->GetTPCDensityFactor()<1.15) continue;
+       if (kink->GetAngle(2)>0.2&&kink->GetTPCDensity(0,1)>0.05) continue;
+
+       Float_t criticalangle = track0->fC22+track0->fC33;
+       criticalangle+= track1->fC22+track1->fC33;
+       criticalangle= 3*TMath::Sqrt(criticalangle);
+       if (criticalangle>0.02) criticalangle=0.02;
+       if (kink->GetAngle(2)<criticalangle) continue;
+      }
+      //
+      Int_t drow = Int_t(2.+0.5/(0.05+kink->GetAngle(2)));  // overlap region defined
+      Float_t shapesum =0;
+      Float_t sum = 0;
+      for ( Int_t row = row0-drow; row<row0+drow;row++){
+       if (row<0) continue;
+       if (row>155) continue;
+       if (ktrack0->fClusterPointer[row]){
+         AliTPCTrackerPoint *point =ktrack0->GetTrackPoint(row);
+         shapesum+=point->GetSigmaY()+point->GetSigmaZ();
+         sum++;
+       }
+       if (ktrack1->fClusterPointer[row]){
+         AliTPCTrackerPoint *point =ktrack1->GetTrackPoint(row);
+         shapesum+=point->GetSigmaY()+point->GetSigmaZ();
+         sum++;
+       }       
+      }
+      if (sum<4){
+       kink->SetShapeFactor(-1.);
       }
+      else{
+       kink->SetShapeFactor(shapesum/sum);
+      }      
+      //      esd->AddKink(kink);
+      kinks->AddLast(kink);
+      kink = new AliESDkink;
+      ncandidates++;
     }
   }
   //
-  // rotate position to global coordinate system connected to  sector at last the point
+  // sort the kinks according quality - and refit them towards vertex
   //
-  for (Int_t i=i1;i<=i2;i++){
-    //    
-    if (sec[i]<0) continue;
-    Double_t alpha = (sec[i2]-sec[i])*fSectors->GetAlpha();
-    Double_t cs = TMath::Cos(alpha);
-    Double_t sn = TMath::Sin(alpha);    
-    Float_t xx2= x[i]*cs+y[i]*sn;
-    Float_t yy2= -x[i]*sn+y[i]*cs;
-    x[i] = xx2;
-    y[i] = yy2;    
+  Int_t       nkinks    = kinks->GetEntriesFast();
+  Float_t    *quality   = new Float_t[nkinks];
+  Int_t      *indexes   = new Int_t[nkinks];
+  AliTPCseed *mothers   = new AliTPCseed[nkinks];
+  AliTPCseed *daughters = new AliTPCseed[nkinks];
+  //
+  //
+  for (Int_t i=0;i<nkinks;i++){
+    quality[i] =100000;
+    AliESDkink *kink = (AliESDkink*)kinks->At(i);
     //
-    xx2= xt[i]*cs+yt[i]*sn;
-    yy2= -xt[i]*sn+yt[i]*cs;
-    xt[i] = xx2;
-    yt[i] = yy2;    
-
-  }
-  //get "state" vector
-  Double_t xh[5],xm = x[padm];  
-  xh[0]=yt[i2];
-  xh[1]=zt[i2];
-  xh[4]=F1(xt[i2],yt[i2],xt[padm],yt[padm],xt[i1],yt[i1]);  
-  xh[2]=F2(xt[i2],yt[i2],xt[padm],yt[padm],xt[i1],yt[i1]);
-  xh[3]=F3n(xt[i2],yt[i2],xt[i1],yt[i1],zt[i2],zt[i1],xh[4]);
-  //
-  //
-  for (Int_t i=i1;i<=i2;i++){
-    Double_t yy,zz;
-    if (sec[i]<0) continue;    
-    GetProlongation(x[i2], x[i],xh,yy,zz);
-    if (TMath::Abs(y[i]-yy)>4||TMath::Abs(z[i]-zz)>4){
-      //Double_t xxh[5];
-      //xxh[4]=F1old(x[i2],y[i2],x[padm],y[padm],x[i1],y[i1]);  
-      //xxh[2]=F2old(x[i2],y[i2],x[padm],y[padm],x[i1],y[i1]);
-      Error("AliTPCtrackerMI::CheckKinkPoint","problem\n");
+    // refit kinks towards vertex
+    // 
+    Int_t index0 = kink->GetIndex(0);
+    Int_t index1 = kink->GetIndex(1);
+    AliTPCseed * ktrack0 = (AliTPCseed*)array->At(index0);
+    AliTPCseed * ktrack1 = (AliTPCseed*)array->At(index1);
+    //
+    Int_t sumn=ktrack0->fN+ktrack1->fN;
+    //
+    // Refit Kink under if too small angle
+    //
+    if (kink->GetAngle(2)<0.05){
+      kink->SetTPCRow0(GetRowNumber(kink->GetR()));
+      Int_t row0 = kink->GetTPCRow0();
+      Int_t drow = Int_t(2.+0.5/(0.05+kink->GetAngle(2)));
+      //
+      //
+      Int_t last  = row0-drow;
+      if (last<40) last=40;
+      if (last<ktrack0->fFirstPoint+25) last = ktrack0->fFirstPoint+25;
+      AliTPCseed* seed0 = ReSeed(ktrack0,last,kFALSE);
+      //
+      //
+      Int_t first = row0+drow;
+      if (first>130) first=130;
+      if (first>ktrack1->fLastPoint-25) first = TMath::Max(ktrack1->fLastPoint-25,30);
+      AliTPCseed* seed1 = ReSeed(ktrack1,first,kTRUE);
+      //
+      if (seed0 && seed1){
+       kink->SetStatus(1,8);
+       if (RefitKink(*seed0,*seed1,*kink)) kink->SetStatus(1,9);
+       row0 = GetRowNumber(kink->GetR());
+       sumn = seed0->fN+seed1->fN;
+       new (&mothers[i])   AliTPCseed(*seed0);
+       new (&daughters[i]) AliTPCseed(*seed1); 
+      }
+      else{
+       delete kinks->RemoveAt(i);
+       if (seed0) delete seed0;
+       if (seed1) delete seed1;
+       continue;
+      }
+      if (kink->GetDistance()>0.5 || kink->GetR()<110 || kink->GetR()>240) {
+       delete kinks->RemoveAt(i);
+       if (seed0) delete seed0;
+       if (seed1) delete seed1;
+       continue;
+      }
+      //
+      delete seed0;
+      delete seed1;            
     }
-    y[i] = y[i] - yy;
-    z[i] = z[i] - zz;
+    //
+    if (kink) quality[i] = 160*((0.1+kink->GetDistance())*(2.-kink->GetTPCDensityFactor()))/(sumn+40.);  //the longest -clossest will win
   }
-  Float_t dyup[160],dydown[160], dzup[160], dzdown[160];
-  Float_t yup[160], ydown[160],  zup[160],  zdown[160];
-  AliTPCpolyTrack ptrack1,ptrack2;
+  TMath::Sort(nkinks,quality,indexes,kFALSE);
+  //
+  //remove double find kinks
+  //
+  for (Int_t ikink0=1;ikink0<nkinks;ikink0++){
+    AliESDkink * kink0 = (AliESDkink*) kinks->At(indexes[ikink0]);
+    if (!kink0) continue;
+    //
+    for (Int_t ikink1=0;ikink1<ikink0;ikink1++){
+      if (!kink0) continue;
+      AliESDkink * kink1 = (AliESDkink*) kinks->At(indexes[ikink1]);
+      if (!kink1) continue;
+      // if not close kink continue
+      if (TMath::Abs(kink1->GetPosition()[2]-kink0->GetPosition()[2])>10) continue;
+      if (TMath::Abs(kink1->GetPosition()[1]-kink0->GetPosition()[1])>10) continue;
+      if (TMath::Abs(kink1->GetPosition()[0]-kink0->GetPosition()[0])>10) continue;
+      //
+      AliTPCseed &mother0   = mothers[indexes[ikink0]];
+      AliTPCseed &daughter0 = daughters[indexes[ikink0]];
+      AliTPCseed &mother1   = mothers[indexes[ikink1]];
+      AliTPCseed &daughter1 = daughters[indexes[ikink1]];
+      Int_t row0 = (kink0->GetTPCRow0()+kink1->GetTPCRow0())/2;
+      //
+      Int_t same  = 0;
+      Int_t both  = 0;
+      Int_t samem = 0;
+      Int_t bothm = 0;
+      Int_t samed = 0;
+      Int_t bothd = 0;
+      //
+      for (Int_t i=0;i<row0;i++){
+       if (mother0.fIndex[i]>0 && mother1.fIndex[i]>0){
+         both++;
+         bothm++;
+         if (mother0.fIndex[i]==mother1.fIndex[i]){
+           same++;
+           samem++;
+         }
+       }
+      }
+
+      for (Int_t i=row0;i<158;i++){
+       if (daughter0.fIndex[i]>0 && daughter0.fIndex[i]>0){
+         both++;
+         bothd++;
+         if (mother0.fIndex[i]==mother1.fIndex[i]){
+           same++;
+           samed++;
+         }
+       }
+      }
+      Float_t ratio = Float_t(same+1)/Float_t(both+1);
+      Float_t ratiom = Float_t(samem+1)/Float_t(bothm+1);
+      Float_t ratiod = Float_t(samed+1)/Float_t(bothd+1);
+      if (ratio>0.3 && ratiom>0.5 &&ratiod>0.5) {
+       Int_t sum0 = mother0.fN+daughter0.fN;
+       Int_t sum1 = mother1.fN+daughter1.fN;
+       if (sum1>sum0){
+         shared[kink0->GetIndex(0)]= kTRUE;
+         shared[kink0->GetIndex(1)]= kTRUE;      
+         delete kinks->RemoveAt(indexes[ikink0]);
+       }
+       else{
+         shared[kink1->GetIndex(0)]= kTRUE;
+         shared[kink1->GetIndex(1)]= kTRUE;      
+         delete kinks->RemoveAt(indexes[ikink1]);
+       }
+      }
+    }
+  }
+
+
+  for (Int_t i=0;i<nkinks;i++){
+    AliESDkink * kink = (AliESDkink*) kinks->At(indexes[i]);
+    if (!kink) continue;
+    kink->SetTPCRow0(GetRowNumber(kink->GetR()));
+    Int_t index0 = kink->GetIndex(0);
+    Int_t index1 = kink->GetIndex(1);
+    if (circular[index0]||circular[index1]&&kink->GetDistance()>0.2) continue;
+    kink->SetMultiple(usage[index0],0);
+    kink->SetMultiple(usage[index1],1);
+    if (kink->GetMultiple()[0]+kink->GetMultiple()[1]>2) continue;
+    if (kink->GetMultiple()[0]+kink->GetMultiple()[1]>0 && quality[indexes[i]]>0.2) continue;
+    if (kink->GetMultiple()[0]+kink->GetMultiple()[1]>0 && kink->GetDistance()>0.2) continue;
+    if (circular[index0]||circular[index1]&&kink->GetDistance()>0.1) continue;
+
+    AliTPCseed * ktrack0 = (AliTPCseed*)array->At(index0);
+    AliTPCseed * ktrack1 = (AliTPCseed*)array->At(index1);
+    if (!ktrack0 || !ktrack1) continue;
+    Int_t index = esd->AddKink(kink);
+    //
+    //
+    if ( ktrack0->fKinkIndexes[0]==0 && ktrack1->fKinkIndexes[0]==0) {  //best kink
+      if (mothers[indexes[i]].fN>20 && daughters[indexes[i]].fN>20 && (mothers[indexes[i]].fN+daughters[indexes[i]].fN)>100){
+       new (ktrack0) AliTPCseed(mothers[indexes[i]]);
+       new (ktrack1) AliTPCseed(daughters[indexes[i]]);
+      }
+    }
+    //
+    ktrack0->fKinkIndexes[usage[index0]] = -(index+1);
+    ktrack1->fKinkIndexes[usage[index1]] =  (index+1);
+    usage[index0]++;
+    usage[index1]++;
+  }
+  //
+  // Remove tracks corresponding to shared kink's
   //
-  // derivation up
-  for (Int_t i=i1;i<=i2;i++){
-    AliTPCclusterMI * cl = seed->fClusterPointer[i];
-    if (!cl) continue;
-    if (cl->GetType()<0) continue;
-    if (cl->GetType()>10) continue;
+  for (Int_t i=0;i<nentries;i++){
+    AliTPCseed * track0 = (AliTPCseed*)array->At(i);
+    if (!track0) continue;
+    if (track0->fKinkIndexes[0]!=0) continue;
+    if (shared[i]) delete array->RemoveAt(i);
+  }
 
-    if (sec[i]>=0){
-      ptrack1.AddPoint(x[i]-xm,y[i],z[i],0.1,0.1);
+  //
+  //
+  RemoveUsed2(array,0.5,0.4,30);
+  UnsignClusters();
+  for (Int_t i=0;i<nentries;i++){
+    AliTPCseed * track0 = (AliTPCseed*)array->At(i);
+    if (!track0) continue;
+    track0->CookdEdx(0.02,0.6);
+    track0->CookPID();
+  }
+  //
+  for (Int_t i=0;i<nentries;i++){
+    AliTPCseed * track0 = (AliTPCseed*)array->At(i);
+    if (!track0) continue;
+    if (track0->Pt()<1.4) continue;
+    //remove double high momenta tracks - overlapped with kink candidates
+    Int_t shared=0;
+    Int_t all   =0;
+    for (Int_t icl=track0->fFirstPoint;icl<track0->fLastPoint; icl++){
+      if (track0->fClusterPointer[icl]!=0){
+       all++;
+       if (track0->fClusterPointer[icl]->IsUsed(10)) shared++;
+      }
     }
-    if (ptrack1.GetN()>4.){
-      ptrack1.UpdateParameters();
-      Double_t ddy,ddz;
-      ptrack1.GetFitDerivation(x[i]-xm,ddy,ddz);
-      Double_t yy,zz;
-      ptrack1.GetFitPoint(x[i]-xm,yy,zz);
-
-      dyup[i] = ddy;
-      dzup[i] = ddz;
-      yup[i]  = yy;
-      zup[i]  = zz;
+    if (Float_t(shared+1)/Float_t(nall+1)>0.5) {
+      delete array->RemoveAt(i);
+      continue;
+    }
+    //
+    if (track0->fKinkIndexes[0]!=0) continue;
+    if (track0->GetNumberOfClusters()<80) continue;
+
+    AliTPCseed *pmother = new AliTPCseed();
+    AliTPCseed *pdaughter = new AliTPCseed();
+    AliESDkink *pkink = new AliESDkink;
+
+    AliTPCseed & mother = *pmother;
+    AliTPCseed & daughter = *pdaughter;
+    AliESDkink & kink = *pkink;
+    if (CheckKinkPoint(track0,mother,daughter, kink)){
+      if (mother.fN<30||daughter.fN<20) {
+       delete pmother;
+       delete pdaughter;
+       delete pkink;
+       continue;  //too short tracks
+      }
+      if (mother.Pt()<1.4) {
+       delete pmother;
+       delete pdaughter;
+       delete pkink;
+       continue;
+      }
+      Int_t row0= kink.GetTPCRow0();
+      if (kink.GetDistance()>0.5 || kink.GetR()<110. || kink.GetR()>240.) {
+       delete pmother;
+       delete pdaughter;
+       delete pkink;
+       continue;
+      }
+      //
+      Int_t index = esd->AddKink(&kink);      
+      mother.fKinkIndexes[0] = -(index+1);
+      daughter.fKinkIndexes[0] = index+1;
+      if (mother.fN>50) {
+       delete array->RemoveAt(i);
+       array->AddAt(new AliTPCseed(mother),i);
+      }
+      else{
+       array->AddLast(new AliTPCseed(mother));
+      }
+      array->AddLast(new AliTPCseed(daughter));      
+      for (Int_t icl=0;icl<row0;icl++) {
+       if (mother.fClusterPointer[icl]) mother.fClusterPointer[icl]->Use(20);
+      }
+      //
+      for (Int_t icl=row0;icl<158;icl++) {
+       if (daughter.fClusterPointer[icl]) daughter.fClusterPointer[icl]->Use(20);
+      }
+      //
+    }
+    delete pmother;
+    delete pdaughter;
+    delete pkink;
+  }
+
+  delete [] daughters;
+  delete [] mothers;
+  //
+  //
+  delete [] dca;
+  delete []circular;
+  delete []shared;
+  delete []quality;
+  delete []indexes;
+  //
+  delete kink;
+  delete[]fim;
+  delete[] zm;
+  delete[] z0;
+  delete [] usage;
+  delete[] alpha;
+  delete[] nclusters;
+  delete[] sign;
+  delete[] helixes;
+  kinks->Delete();
+  delete kinks;
+
+  printf("Ncandidates=\t%d\t%d\t%d\t%d\n",esd->GetNumberOfKinks(),ncandidates,ntracks,nall);
+  timer.Print();
+}
 
+void  AliTPCtrackerMI::FindV0s(TObjArray * array, AliESD *esd)
+{
+  //
+  //  find V0s
+  //
+  //
+  TObjArray *tpcv0s      = new TObjArray(100000);
+  Int_t     nentries     = array->GetEntriesFast();
+  AliHelix *helixes      = new AliHelix[nentries];
+  Int_t    *sign         = new Int_t[nentries];
+  Float_t  *alpha        = new Float_t[nentries];
+  Float_t  *z0           = new Float_t[nentries]; 
+  Float_t  *dca          = new Float_t[nentries];
+  Float_t  *sdcar        = new Float_t[nentries];
+  Float_t  *cdcar        = new Float_t[nentries];
+  Float_t  *pulldcar     = new Float_t[nentries];
+  Float_t  *pulldcaz     = new Float_t[nentries];
+  Float_t  *pulldca      = new Float_t[nentries];
+  Bool_t   *isPrim       = new Bool_t[nentries];  
+  const AliESDVertex * primvertex = esd->GetVertex();
+  Double_t             zvertex = primvertex->GetZv(); 
+  //
+  //  nentries = array->GetEntriesFast();
+  //
+  for (Int_t i=0;i<nentries;i++){
+    sign[i]=0;
+    isPrim[i]=0;
+    AliTPCseed* track = (AliTPCseed*)array->At(i);    
+    if (!track) continue;
+    track->GetV0Indexes()[0] = 0;  //rest v0 indexes
+    track->GetV0Indexes()[1] = 0;  //rest v0 indexes
+    track->GetV0Indexes()[2] = 0;  //rest v0 indexes
+    //
+    alpha[i] = track->GetAlpha();
+    new (&helixes[i]) AliHelix(*track);
+    Double_t xyz[3];
+    helixes[i].Evaluate(0,xyz);
+    sign[i] = (track->GetC()>0) ? -1:1;
+    Double_t x,y,z;
+    x=160;
+    z0[i]=1000;
+    if (track->GetProlongation(0,y,z))  z0[i] = z;
+    dca[i] = track->GetD(0,0);
+    // 
+    // dca error parrameterezation + pulls
+    //
+    sdcar[i]      = TMath::Sqrt(0.150*0.150+(100*track->fP4)*(100*track->fP4));
+    if (TMath::Abs(track->fP3)>1) sdcar[i]*=2.5;
+    cdcar[i]      = TMath::Exp((TMath::Abs(track->fP4)-0.0106)*525.3);
+    pulldcar[i]   = (dca[i]-cdcar[i])/sdcar[i];
+    pulldcaz[i]   = (z0[i]-zvertex)/sdcar[i];
+    pulldca[i]    = TMath::Sqrt(pulldcar[i]*pulldcar[i]+pulldcaz[i]*pulldcaz[i]);
+    if (track->fTPCr[1]+track->fTPCr[2]+track->fTPCr[3]>0.5) {
+      if (pulldca[i]<3.) isPrim[i]=kTRUE;  //pion, muon and Kaon  3 sigma cut
     }
-    else{
-      dyup[i]=0.;  //not enough points
+    if (track->fTPCr[4]>0.5) {
+      if (pulldca[i]<0.5) isPrim[i]=kTRUE;  //proton 0.5 sigma cut
+    }
+    if (track->fTPCr[0]>0.4) {
+      isPrim[i]=kFALSE;  //electron no  sigma cut
     }
   }
   //
-  // derivation down
-  for (Int_t i=i2;i>=i1;i--){
-    AliTPCclusterMI * cl = seed->fClusterPointer[i];
-    if (!cl) continue;
-    if (cl->GetType()<0) continue;
-    if (cl->GetType()>10) continue;
-    if (sec[i]>=0){
-      ptrack2.AddPoint(x[i]-xm,y[i],z[i],0.1,0.1);
+  //
+  TStopwatch timer;
+  timer.Start();
+  Int_t ncandidates =0;
+  Int_t nall =0;
+  Int_t ntracks=0; 
+  Double_t phase[2][2],radius[2];
+  //
+  //  Finf V0s loop
+  // 
+  //
+  // //  
+  TTreeSRedirector &cstream = *fDebugStreamer; 
+  Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
+  AliESDV0MI vertex; 
+  Double_t cradius0 = 10*10;
+  Double_t cradius1 = 200*200;
+  Double_t cdist1=3.;
+  Double_t cdist2=4.;
+  Double_t cpointAngle = 0.95;
+  //
+  Double_t delta[2]={10000,10000};
+  for (Int_t i =0;i<nentries;i++){
+    if (sign[i]==0) continue;
+    AliTPCseed * track0 = (AliTPCseed*)array->At(i);
+    if (!track0) continue;
+    if (AliTPCReconstructor::StreamLevel()>0){
+      cstream<<"Tracks"<<
+       "Tr0.="<<track0<<
+       "dca="<<dca[i]<<
+       "z0="<<z0[i]<<
+       "zvertex="<<zvertex<<
+       "sdcar0="<<sdcar[i]<<
+       "cdcar0="<<cdcar[i]<<
+       "pulldcar0="<<pulldcar[i]<<
+       "pulldcaz0="<<pulldcaz[i]<<
+       "pulldca0="<<pulldca[i]<<
+       "isPrim="<<isPrim[i]<<
+       "\n";
     }
-    if (ptrack2.GetN()>4){
-      ptrack2.UpdateParameters();
-      Double_t ddy,ddz;
-      ptrack2.GetFitDerivation(x[i]-xm,ddy,ddz);
-      Double_t yy,zz;
-      ptrack2.GetFitPoint(x[i]-xm,yy,zz);
-
-      dydown[i] = ddy;
-      dzdown[i] = ddz;
-      ydown[i]  = yy;
-      zdown[i]  = zz;
+    //
+    if (track0->fP4<0) continue;
+    if (track0->GetKinkIndex(0)>0||isPrim[i]) continue;   //daughter kink
+    //
+    if (TMath::Abs(helixes[i].GetHelix(4))<0.000000001) continue;
+    ntracks++;
+    // debug output
+    
+    
+    for (Int_t j =0;j<nentries;j++){
+      AliTPCseed * track1 = (AliTPCseed*)array->At(j);
+      if (!track1) continue;
+      if (track1->GetKinkIndex(0)>0 || isPrim[j]) continue; //daughter kink
+      if (sign[j]*sign[i]>0) continue; 
+      if (TMath::Abs(helixes[j].GetHelix(4))<0.000001) continue;
+      if (track0->fCircular+track1->fCircular>1) continue;    //circling -returning track
+      nall++;
+      //
+      // DCA to prim vertex cut
+      //
+      //
+      delta[0]=10000;
+      delta[1]=10000;
+
+      Int_t npoints = helixes[i].GetRPHIintersections(helixes[j], phase, radius,cdist2);
+      if (npoints<1) continue;
+      Int_t iclosest=0;
+      // cuts on radius      
+      if (npoints==1){
+       if (radius[0]<cradius0||radius[0]>cradius1) continue;
+       helixes[i].LinearDCA(helixes[j],phase[0][0],phase[0][1],radius[0],delta[0]);
+       if (delta[0]>cdist1) continue;
+      }
+      else{
+       if (TMath::Max(radius[0],radius[1])<cradius0|| TMath::Min(radius[0],radius[1])>cradius1) continue;      
+       helixes[i].LinearDCA(helixes[j],phase[0][0],phase[0][1],radius[0],delta[0]);    
+       helixes[i].LinearDCA(helixes[j],phase[1][0],phase[1][1],radius[1],delta[1]);
+       if (delta[1]<delta[0]) iclosest=1;
+       if (delta[iclosest]>cdist1) continue;
+      }
+      helixes[i].ParabolicDCA(helixes[j],phase[iclosest][0],phase[iclosest][1],radius[iclosest],delta[iclosest]);
+      if (radius[iclosest]<cradius0 || radius[iclosest]>cradius1 || delta[iclosest]>cdist1) continue;
+      //
+      Double_t pointAngle = helixes[i].GetPointAngle(helixes[j],phase[iclosest],fprimvertex);
+      if (pointAngle<cpointAngle) continue;
+      //
+      Bool_t isGamma = kFALSE;
+      vertex.SetP(*track0); //track0 - plus
+      vertex.SetM(*track1); //track1 - minus
+      vertex.Update(fprimvertex);
+      if (track0->fTPCr[0]>0.3&&track1->fTPCr[0]>0.3&&vertex.GetAnglep()[2]<0.15) isGamma=kTRUE;              // gamma conversion candidate
+      Double_t pointAngle2 = vertex.GetPointAngle();
+      //continue;
+      if (vertex.GetPointAngle()<cpointAngle && (!isGamma)) continue; // point angle cut
+      if (vertex.GetDist2()>2&&(!isGamma)) continue;         // point angle cut
+      Float_t sigmae     = 0.15*0.15;
+      if (vertex.GetRr()<80) 
+       sigmae += (sdcar[i]*sdcar[i]+sdcar[j]*sdcar[j])*(1.-vertex.GetRr()/80.)*(1.-vertex.GetRr()/80.);
+      sigmae+= TMath::Sqrt(sigmae);
+      if (vertex.GetDist2()/sigmae>3.&&(!isGamma)) continue; 
+      Float_t densb0=0,densb1=0,densa0=0,densa1=0;
+      Int_t row0 = GetRowNumber(vertex.GetRr());
+      if (row0>15){
+       if (vertex.GetDist2()>0.2) continue;             
+       densb0     = track0->Density2(0,row0-5);          
+       densb1     = track1->Density2(0,row0-5);         
+       if (densb0>0.3|| densb1>0.3) continue;            //clusters before vertex
+       densa0     = track0->Density2(row0+5,row0+40);    
+       densa1     = track1->Density2(row0+5,row0+40);    
+       if ((densa0<0.4|| densa1<0.4)&&(!isGamma)) continue;            //missing clusters after vertex
+      }
+      else{
+       densa0     = track0->Density2(0,40);  //cluster density
+       densa1     = track1->Density2(0,40);  //cluster density
+       if ((vertex.GetRr()<80&&densa0+densa1<1.)&&(!isGamma)) continue;
+      }
+      vertex.SetLab(0,track0->GetLabel());
+      vertex.SetLab(1,track1->GetLabel());
+      vertex.SetChi2After((densa0+densa1)*0.5);
+      vertex.SetChi2Before((densb0+densb1)*0.5);
+      vertex.SetIndex(0,i);
+      vertex.SetIndex(1,j);
+      vertex.SetStatus(1); // TPC v0 candidate
+      vertex.SetRp(track0->fTPCr);
+      vertex.SetRm(track1->fTPCr);
+      tpcv0s->AddLast(new AliESDV0MI(vertex));      
+      ncandidates++;
+      {
+       Int_t eventNr = esd->GetEventNumber();
+       Double_t radiusm= (delta[0]<delta[1])? TMath::Sqrt(radius[0]):TMath::Sqrt(radius[1]);  
+       Double_t deltam= (delta[0]<delta[1])? TMath::Sqrt(delta[0]):TMath::Sqrt(delta[1]);  
+       if (AliTPCReconstructor::StreamLevel()>0)
+         cstream<<"V0"<<
+         "Event="<<eventNr<<
+         "vertex.="<<&vertex<<
+         "Tr0.="<<track0<<
+         "lab0="<<track0->fLab<<
+         "Helix0.="<<&helixes[i]<<     
+         "Tr1.="<<track1<<
+         "lab1="<<track1->fLab<<
+         "Helix1.="<<&helixes[j]<<
+         "pointAngle="<<pointAngle<<
+         "pointAngle2="<<pointAngle2<<
+         "dca0="<<dca[i]<<
+         "dca1="<<dca[j]<<
+         "z0="<<z0[i]<<
+         "z1="<<z0[j]<<
+         "zvertex="<<zvertex<<
+         "circular0="<<track0->fCircular<<
+         "circular1="<<track1->fCircular<<
+         "npoints="<<npoints<<
+         "radius0="<<radius[0]<<
+         "delta0="<<delta[0]<<
+         "radius1="<<radius[1]<<
+         "delta1="<<delta[1]<<
+         "radiusm="<<radiusm<<
+         "deltam="<<deltam<<
+         "sdcar0="<<sdcar[i]<<
+         "sdcar1="<<sdcar[j]<<
+         "cdcar0="<<cdcar[i]<<
+         "cdcar1="<<cdcar[j]<<
+         "pulldcar0="<<pulldcar[i]<<
+         "pulldcar1="<<pulldcar[j]<<
+         "pulldcaz0="<<pulldcaz[i]<<
+         "pulldcaz1="<<pulldcaz[j]<<
+         "pulldca0="<<pulldca[i]<<
+         "pulldca1="<<pulldca[j]<<
+         "densb0="<<densb0<<
+         "densb1="<<densb1<<
+         "densa0="<<densa0<<
+         "densa1="<<densa1<<
+         "sigmae="<<sigmae<<
+         "\n";
+      }
     }
-    else{
-      dydown[i]=0.;  //not enough points
+  }    
+  Float_t *quality = new Float_t[ncandidates];
+  Int_t *indexes = new Int_t[ncandidates];
+  Int_t naccepted =0;
+  for (Int_t i=0;i<ncandidates;i++){
+    quality[i]     = 0; 
+    AliESDV0MI *v0 = (AliESDV0MI*)tpcv0s->At(i);
+    quality[i]     = 1./(1.00001-v0->GetPointAngle());   //base point angle
+    // quality[i]    /= (0.5+v0->GetDist2());  
+    // quality[i]    *= v0->GetChi2After();               //density factor
+    Double_t minpulldca = TMath::Min(2.+pulldca[v0->GetIndex(0)],(2.+pulldca[v0->GetIndex(1)]) );     //pull
+    Int_t index0 = v0->GetIndex(0);
+    Int_t index1 = v0->GetIndex(1);
+    AliTPCseed * track0 = (AliTPCseed*)array->At(index0);
+    AliTPCseed * track1 = (AliTPCseed*)array->At(index1);
+    if (track0->fTPCr[0]>0.3&&track1->fTPCr[0]>0.3&&v0->GetAnglep()[2]<0.15) quality[i]+=1000000;              // gamma conversion candidate
+    if (track0->fTPCr[4]>0.9||track1->fTPCr[4]>0.9&&minpulldca>4) quality[i]*=10;    // lambda candidate candidate
+  }
+
+  TMath::Sort(ncandidates,quality,indexes,kTRUE);
+  //
+  //
+  for (Int_t i=0;i<ncandidates;i++){
+    AliESDV0MI * v0 = (AliESDV0MI*)tpcv0s->At(indexes[i]);
+    if (!v0) continue;
+    Int_t index0 = v0->GetIndex(0);
+    Int_t index1 = v0->GetIndex(1);
+    AliTPCseed * track0 = (AliTPCseed*)array->At(index0);
+    AliTPCseed * track1 = (AliTPCseed*)array->At(index1);
+    if (!track0||!track1) {
+      printf("Bug\n");
+      continue;
+    }
+    Bool_t accept =kTRUE;  //default accept
+    Int_t *v0indexes0 = track0->GetV0Indexes();
+    Int_t *v0indexes1 = track1->GetV0Indexes();
+    //
+    Int_t order0 = (v0indexes0[0]!=0) ? 1:0;
+    Int_t order1 = (v0indexes1[0]!=0) ? 1:0;    
+    if (v0indexes0[1]!=0) order0 =2;
+    if (v0indexes1[1]!=0) order1 =2;      
+    //
+    if (v0indexes0[2]!=0) {order0=3; accept=kFALSE;}
+    if (v0indexes0[2]!=0) {order1=3; accept=kFALSE;}
+    //
+    AliESDV0MI * v02 = v0;
+    if (accept){
+      v0->SetOrder(0,order0);
+      v0->SetOrder(1,order1);
+      v0->SetOrder(1,order0+order1);     
+      Int_t index = esd->AddV0MI(v0);
+      v02 = esd->GetV0MI(index);
+      v0indexes0[order0]=index;
+      v0indexes1[order1]=index;
+      naccepted++;
+    }
+    {
+      Int_t eventNr = esd->GetEventNumber();
+      if (AliTPCReconstructor::StreamLevel()>0)
+       cstream<<"V02"<<
+       "Event="<<eventNr<<
+       "vertex.="<<v0<<        
+       "vertex2.="<<v02<<
+       "Tr0.="<<track0<<
+       "lab0="<<track0->fLab<<
+       "Tr1.="<<track1<<
+       "lab1="<<track1->fLab<<
+       "dca0="<<dca[index0]<<
+       "dca1="<<dca[index1]<<
+       "order0="<<order0<<
+       "order1="<<order1<<
+       "accept="<<accept<<
+       "quality="<<quality[i]<<
+       "pulldca0="<<pulldca[index0]<<
+       "pulldca1="<<pulldca[index1]<<
+       "index="<<i<<
+       "\n";
+    }
+  }    
+
+
+  //
+  //
+  delete []quality;
+  delete []indexes;
+//
+  delete [] isPrim;
+  delete [] pulldca;
+  delete [] pulldcaz;
+  delete [] pulldcar;
+  delete [] cdcar;
+  delete [] sdcar;
+  delete [] dca;
+  //
+  delete[] z0;
+  delete[] alpha;
+  delete[] sign;
+  delete[] helixes;
+  printf("TPC V0 finder : naccepted\t%d\tncandidates\t%d\tntracks\t%d\tnall\t%d\n",naccepted,ncandidates,ntracks,nall);
+  timer.Print();
+}
+
+Int_t AliTPCtrackerMI::RefitKink(AliTPCseed &mother, AliTPCseed &daughter, AliESDkink &kink)
+{
+  //
+  // refit kink towards to the vertex
+  //
+  //
+  Int_t row0 = GetRowNumber(kink.GetR());
+  FollowProlongation(mother,0);
+  mother.Reset(kFALSE);
+  //
+  FollowProlongation(daughter,row0);
+  daughter.Reset(kFALSE);
+  FollowBackProlongation(daughter,158);
+  daughter.Reset(kFALSE);
+  Int_t first = TMath::Max(row0-20,30); 
+  Int_t last  = TMath::Min(row0+20,140);
+  //
+  const Int_t kNdiv =5;
+  AliTPCseed  param0[kNdiv];  // parameters along the track
+  AliTPCseed  param1[kNdiv];  // parameters along the track
+  AliESDkink   kinks[kNdiv];   // corresponding kink parameters
+  //
+  Int_t rows[kNdiv];
+  for (Int_t irow=0; irow<kNdiv;irow++){
+    rows[irow] = first +((last-first)*irow)/(kNdiv-1);
+  }
+  // store parameters along the track
+  //
+  for (Int_t irow=0;irow<kNdiv;irow++){
+    FollowBackProlongation(mother, rows[irow]);
+    FollowProlongation(daughter,rows[kNdiv-1-irow]);       
+    new(&param0[irow])     AliTPCseed(mother);
+    new(&param1[kNdiv-1-irow])   AliTPCseed(daughter);
+  }
+  //
+  // define kinks 
+  for (Int_t irow=0; irow<kNdiv-1;irow++){
+    if (param0[irow].fN<kNdiv||param1[irow].fN<kNdiv) continue;
+    kinks[irow].SetMother(param0[irow]);
+    kinks[irow].SetDaughter(param1[irow]);
+    kinks[irow].Update();
+  }
+  //
+  // choose kink with best "quality"
+  Int_t index =-1;
+  Double_t mindist = 10000;
+  for (Int_t irow=0;irow<kNdiv;irow++){
+    if (param0[irow].fN<20||param1[irow].fN<20) continue;
+    if (TMath::Abs(kinks[irow].GetR())>240.) continue;
+    if (TMath::Abs(kinks[irow].GetR())<100.) continue;
+    //
+    Float_t normdist = TMath::Abs(param0[irow].fX-kinks[irow].GetR())*(0.1+kink.GetDistance());
+    normdist/= (param0[irow].fN+param1[irow].fN+40.);
+    if (normdist < mindist){
+      mindist = normdist;
+      index = irow;
     }
   }
   //
+  if (index==-1) return 0;
+  //
+  //
+  param0[index].Reset(kTRUE);
+  FollowProlongation(param0[index],0);
+  //
+  new (&mother) AliTPCseed(param0[index]);
+  new (&daughter) AliTPCseed(param1[index]);  // daughter in vertex
   //
-  // find maximal difference of the derivation
-  for (Int_t i=0;i<12;i++) seed->fKinkPoint[i]=0;
+  kink.SetMother(mother);
+  kink.SetDaughter(daughter);
+  kink.Update();
+  kink.SetTPCRow0(GetRowNumber(kink.GetR()));
+  kink.SetTPCncls(param0[index].fN,0);
+  kink.SetTPCncls(param1[index].fN,1);
+  kink.SetLabel(CookLabel(&mother,0.4, 0,kink.GetTPCRow0()),0);
+  kink.SetLabel(CookLabel(&daughter,0.4, kink.GetTPCRow0(),160),1);
+  mother.SetLabel(kink.GetLabel(0));
+  daughter.SetLabel(kink.GetLabel(1));
 
+  return 1;
+}
 
-  for (Int_t i=i1+10;i<i2-10;i++){
-    if ( (TMath::Abs(dydown[i])<0.00000001)  ||  (TMath::Abs(dyup[i])<0.00000001) ||i<30)continue;
-    //    printf("%f\t%f\t%f\t%f\t%f\n",x[i],dydown[i],dyup[i],dzdown[i],dzup[i]);
+
+void AliTPCtrackerMI::UpdateKinkQualityM(AliTPCseed * seed){
+  //
+  // update Kink quality information for mother after back propagation
+  //
+  if (seed->GetKinkIndex(0)>=0) return; 
+  for (Int_t ikink=0;ikink<3;ikink++){
+    Int_t index = seed->GetKinkIndex(ikink);
+    if (index>=0) break;
+    index = TMath::Abs(index)-1;
+    AliESDkink * kink = fEvent->GetKink(index);
+    //kink->fTPCdensity2[0][0]=-1;
+    //kink->fTPCdensity2[0][1]=-1;
+    kink->SetTPCDensity2(-1,0,0);
+    kink->SetTPCDensity2(1,0,1);
     //
-    Float_t ddy = TMath::Abs(dydown[i]-dyup[i]);
-    Float_t ddz = TMath::Abs(dzdown[i]-dzup[i]);    
-    if ( (ddy+ddz)> th){
-      seed->fKinkPoint[0] = i;
-      seed->fKinkPoint[1] = ddy;
-      seed->fKinkPoint[2] = ddz;
-      th = ddy+ddz;      
-    }
+    Int_t row0 = kink->GetTPCRow0() - 2 - Int_t( 0.5/ (0.05+kink->GetAngle(2)));
+    if (row0<15) row0=15;
+    //
+    Int_t row1 = kink->GetTPCRow0() + 2 +  Int_t( 0.5/ (0.05+kink->GetAngle(2)));
+    if (row1>145) row1=145;
+    //
+    Int_t found,foundable,shared;
+    seed->GetClusterStatistic(0,row0, found, foundable,shared,kFALSE);
+    if (foundable>5)   kink->SetTPCDensity2(Float_t(found)/Float_t(foundable),0,0);
+    seed->GetClusterStatistic(row1,155, found, foundable,shared,kFALSE);
+    if (foundable>5)   kink->SetTPCDensity2(Float_t(found)/Float_t(foundable),0,1);
   }
+    
+}
 
-  if (fTreeDebug){
+void AliTPCtrackerMI::UpdateKinkQualityD(AliTPCseed * seed){
+  //
+  // update Kink quality information for daughter after refit
+  //
+  if (seed->GetKinkIndex(0)<=0) return; 
+  for (Int_t ikink=0;ikink<3;ikink++){
+    Int_t index = seed->GetKinkIndex(ikink);
+    if (index<=0) break;
+    index = TMath::Abs(index)-1;
+    AliESDkink * kink = fEvent->GetKink(index);
+    kink->SetTPCDensity2(-1,1,0);
+    kink->SetTPCDensity2(-1,1,1);
     //
-    //write information to the debug tree
-    TBranch * br = fTreeDebug->GetBranch("debug");
-    TClonesArray * arr = new TClonesArray("AliTPCTrackPoint2");
-    arr->ExpandCreateFast(i2-i1);
-    br->SetAddress(&arr);
+    Int_t row0 = kink->GetTPCRow0() -2 - Int_t( 0.5/ (0.05+kink->GetAngle(2)));
+    if (row0<15) row0=15;
     //
-    AliTPCclusterMI cldummy;
-    cldummy.SetQ(0);
-    AliTPCTrackPoint2 pdummy;
-    pdummy.GetTPoint().fIsShared = 10;
+    Int_t row1 = kink->GetTPCRow0() +2 +  Int_t( 0.5/ (0.05+kink->GetAngle(2)));
+    if (row1>145) row1=145;
     //
-    Double_t alpha = sec[i2]*fSectors->GetAlpha();
-    Double_t cs    = TMath::Cos(alpha);
-    Double_t sn    = TMath::Sin(alpha);    
-
-    for (Int_t i=i1;i<i2;i++){
-      AliTPCTrackPoint2 *trpoint = (AliTPCTrackPoint2*)arr->UncheckedAt(i-i1);
-      //cluster info
-      AliTPCclusterMI * cl0 = seed->fClusterPointer[i];
-      //      
-      AliTPCTrackerPoint * point = seed->GetTrackPoint(i);
-      
-      if (cl0){
-       Double_t x = GetXrow(i);
-       trpoint->GetTPoint() = *point;
-       trpoint->GetCPoint() = *cl0;
-       trpoint->GetCPoint().SetQ(TMath::Abs(cl0->GetQ()));
-       trpoint->fID    = seed->GetUniqueID();
-       trpoint->fLab   = seed->GetLabel();
-       //
-       trpoint->fGX =  cs *x + sn*point->GetY();
-       trpoint->fGY = -sn *x + cs*point->GetY() ;
-       trpoint->fGZ = point->GetZ();
-       //
-       trpoint->fDY = y[i];
-       trpoint->fDZ = z[i];
-       //
-       trpoint->fDYU = dyup[i];
-       trpoint->fDZU = dzup[i];
-       //
-       trpoint->fDYD = dydown[i];
-       trpoint->fDZD = dzdown[i];
-       //
-       if (TMath::Abs(dyup[i])>0.00000000001 &&TMath::Abs(dydown[i])>0.00000000001){
-         trpoint->fDDY = dydown[i]-dyup[i];
-         trpoint->fDDZ = dzdown[i]-dzup[i];
-       }else{
-         trpoint->fDDY = 0.;
-         trpoint->fDDZ = 0.;
-       }       
-      }
-      else{
-       *trpoint = pdummy;
-       trpoint->GetCPoint()= cldummy;
-       trpoint->fID = -1;
-      }
-      //     
-    }
-    fTreeDebug->Fill();
+    Int_t found,foundable,shared;
+    seed->GetClusterStatistic(0,row0, found, foundable,shared,kFALSE);
+    if (foundable>5)   kink->SetTPCDensity2(Float_t(found)/Float_t(foundable),1,0);
+    seed->GetClusterStatistic(row1,155, found, foundable,shared,kFALSE);
+    if (foundable>5)   kink->SetTPCDensity2(Float_t(found)/Float_t(foundable),1,1);
   }
+    
+}
+
+
+Int_t  AliTPCtrackerMI::CheckKinkPoint(AliTPCseed*seed,AliTPCseed &mother, AliTPCseed &daughter, AliESDkink &kink)
+{
+  //
+  // check kink point for given track
+  // if return value=0 kink point not found
+  // otherwise seed0 correspond to mother particle
+  //           seed1 correspond to daughter particle
+  //           kink  parameter of kink point
+
+  Int_t middlerow = (seed->fFirstPoint+seed->fLastPoint)/2;
+  Int_t first = seed->fFirstPoint; 
+  Int_t last  = seed->fLastPoint;
+  if (last-first<20) return 0;          // shortest length - 2*30 = 60 pad-rows
+
   
+  AliTPCseed *seed1 = ReSeed(seed,middlerow+20, kTRUE);  //middle of chamber
+  if (!seed1) return 0;
+  FollowProlongation(*seed1,seed->fLastPoint-20);
+  seed1->Reset(kTRUE);
+  FollowProlongation(*seed1,158);
+  seed1->Reset(kTRUE);  
+  last = seed1->fLastPoint;
+  //
+  AliTPCseed *seed0 = new AliTPCseed(*seed);
+  seed0->Reset(kFALSE);
+  seed0->Reset();
+  //
+  AliTPCseed  param0[20];  // parameters along the track
+  AliTPCseed  param1[20];  // parameters along the track
+  AliESDkink            kinks[20];   // corresponding kink parameters
+  Int_t rows[20];
+  for (Int_t irow=0; irow<20;irow++){
+    rows[irow] = first +((last-first)*irow)/19;
+  }
+  // store parameters along the track
+  //
+  for (Int_t irow=0;irow<20;irow++){
+    FollowBackProlongation(*seed0, rows[irow]);
+    FollowProlongation(*seed1,rows[19-irow]);       
+    new(&param0[irow])     AliTPCseed(*seed0);
+    new(&param1[19-irow])   AliTPCseed(*seed1);
+  }
+  //
+  // define kinks 
+  for (Int_t irow=0; irow<19;irow++){
+    kinks[irow].SetMother(param0[irow]);
+    kinks[irow].SetDaughter(param1[irow]);
+    kinks[irow].Update();
+  }
+  //
+  // choose kink with biggest change of angle
+  Int_t index =-1;
+  Double_t maxchange= 0;
+  for (Int_t irow=1;irow<19;irow++){
+    if (TMath::Abs(kinks[irow].GetR())>240.) continue;
+    if (TMath::Abs(kinks[irow].GetR())<110.) continue;
+    Float_t quality = TMath::Abs(kinks[irow].GetAngle(2))/(3.+TMath::Abs(kinks[irow].GetR()-param0[irow].fX));
+    if ( quality > maxchange){
+      maxchange = quality;
+      index = irow;
+      //
+    }
+  }
+  delete seed0;
+  delete seed1;
+  if (index<0) return 0;
+  //
+  Int_t row0    = GetRowNumber(kinks[index].GetR());   //row 0 estimate
+  seed0 = new AliTPCseed(param0[index]);
+  seed1 = new AliTPCseed(param1[index]);
+  seed0->Reset(kFALSE);
+  seed1->Reset(kFALSE);
+  seed0->ResetCovariance();
+  seed1->ResetCovariance();
+  FollowProlongation(*seed0,0);
+  FollowBackProlongation(*seed1,158);
+  new (&mother) AliTPCseed(*seed0);  // backup mother at position 0
+  seed0->Reset(kFALSE);  
+  seed1->Reset(kFALSE);
+  seed0->ResetCovariance();
+  seed1->ResetCovariance();
+  //
+  first = TMath::Max(row0-20,0);
+  last  = TMath::Min(row0+20,158);
+  //
+  for (Int_t irow=0; irow<20;irow++){
+    rows[irow] = first +((last-first)*irow)/19;
+  }
+  // store parameters along the track
+  //
+  for (Int_t irow=0;irow<20;irow++){
+    FollowBackProlongation(*seed0, rows[irow]);
+    FollowProlongation(*seed1,rows[19-irow]);       
+    new(&param0[irow])     AliTPCseed(*seed0);
+    new(&param1[19-irow])   AliTPCseed(*seed1);
+  }
+  //
+  // define kinks 
+  for (Int_t irow=0; irow<19;irow++){
+    kinks[irow].SetMother(param0[irow]);
+    kinks[irow].SetDaughter(param1[irow]);
+    //    param0[irow].Dump();
+    //param1[irow].Dump();
+    kinks[irow].Update();
+  }
+  //
+  // choose kink with biggest change of angle
+  index =-1;
+  maxchange= 0;
+  for (Int_t irow=0;irow<20;irow++){
+    if (TMath::Abs(kinks[irow].GetR())>250.) continue;
+    if (TMath::Abs(kinks[irow].GetR())<90.) continue;
+    Float_t quality = TMath::Abs(kinks[irow].GetAngle(2))/(3.+TMath::Abs(kinks[irow].GetR()-param0[irow].fX));
+    if ( quality > maxchange){
+      maxchange = quality;
+      index = irow;
+      //
+    }
+  }
+  //
+  //
+  if (index==-1 || param0[index].fN+param1[index].fN<100){
+    delete seed0;
+    delete seed1;
+    return 0;
+  }
+  //  Float_t anglesigma = TMath::Sqrt(param0[index].fC22+param0[index].fC33+param1[index].fC22+param1[index].fC33);
   
-  return 0;
-  
+  kink.SetMother(param0[index]);
+  kink.SetDaughter(param1[index]);
+  kink.Update();
+  row0    = GetRowNumber(kink.GetR());   
+  kink.SetTPCRow0(row0);
+  kink.SetLabel(CookLabel(seed0,0.5,0,row0),0);
+  kink.SetLabel(CookLabel(seed1,0.5,row0,158),1);
+  kink.SetIndex(-10,0);
+  kink.SetIndex(int(param0[index].fN+param1[index].fN),1);
+  kink.SetTPCncls(param0[index].fN,0);
+  kink.SetTPCncls(param1[index].fN,1);
+  //
+  //
+  //  new (&mother) AliTPCseed(param0[index]);
+  new (&daughter) AliTPCseed(param1[index]);
+  daughter.SetLabel(kink.GetLabel(1));  
+  param0[index].Reset(kTRUE);
+  FollowProlongation(param0[index],0);  
+  new (&mother) AliTPCseed(param0[index]);
+  mother.SetLabel(kink.GetLabel(0));
+  delete seed0;
+  delete seed1;
+  //
+  return 1;
 }
 
 
 
 
-
 AliTPCseed*  AliTPCtrackerMI::ReSeed(AliTPCseed *t)
 {
   //
@@ -3973,7 +5402,7 @@ Int_t AliTPCtrackerMI::ReadSeeds(const TFile *inp) {
   Int_t n=(Int_t)seedTree->GetEntries();
   for (Int_t i=0; i<n; i++) {
      seedTree->GetEvent(i);
-     fSeeds->AddLast(new AliTPCseed(*seed,seed->GetAlpha()));
+     fSeeds->AddLast(new AliTPCseed(*seed/*,seed->GetAlpha()*/));
   }
   
   delete seed;
@@ -4017,7 +5446,8 @@ Int_t AliTPCtrackerMI::Clusters2Tracks() {
     if (nc<20) {
       delete fSeeds->RemoveAt(i);
       continue;
-    }
+    } 
+    CookLabel(pt,0.1); 
     if (pt->fRemoval==10) {
       if (pt->GetDensityFirst(20)>0.8 || pt->GetDensityFirst(30)>0.8 || pt->GetDensityFirst(40)>0.7)
        pt->Desactivate(10);  // make track again active
@@ -4027,11 +5457,50 @@ Int_t AliTPCtrackerMI::Clusters2Tracks() {
       }
     } 
   }
-  RemoveDouble(fSeeds,0.2,0.6,11);
-  RemoveUsed(fSeeds,0.5,0.5,6);
-
   //
+  RemoveUsed2(fSeeds,0.85,0.85,0);
+  if (AliTPCReconstructor::GetRecoParam()->GetDoKinks()) FindKinks(fSeeds,fEvent);
+  RemoveUsed2(fSeeds,0.5,0.4,20);
+ //  //
+//   // refit short tracks
+//   //
   Int_t nseed=fSeeds->GetEntriesFast();
+//   for (Int_t i=0; i<nseed; i++) {
+//     AliTPCseed *pt=(AliTPCseed*)fSeeds->UncheckedAt(i), &t=*pt;    
+//     if (!pt) continue;    
+//     Int_t nc=t.GetNumberOfClusters();
+//     if (nc<15) {
+//       delete fSeeds->RemoveAt(i);
+//       continue;
+//     }
+//     if (pt->GetKinkIndexes()[0]!=0) continue; // ignore kink candidates
+//     if (nc>100) continue;                     // hopefully, enough for ITS
+//     AliTPCseed *seed2 = new AliTPCseed(*pt);
+//     //seed2->Reset(kFALSE);
+//     //pt->ResetCovariance();
+//     seed2->Modify(1);
+//     FollowBackProlongation(*seed2,158);
+//     //seed2->Reset(kFALSE);
+//     seed2->Modify(10);
+//     FollowProlongation(*seed2,0);
+//     TTreeSRedirector &cstream = *fDebugStreamer;
+//     cstream<<"Crefit"<<
+//       "Tr0.="<<pt<<
+//       "Tr1.="<<seed2<<
+//       "\n";     
+//     if (seed2->fN>pt->fN){
+//       delete fSeeds->RemoveAt(i);
+//       fSeeds->AddAt(seed2,i);
+//     }else{
+//       delete seed2;
+//     }
+//   }
+//   RemoveUsed2(fSeeds,0.6,0.6,50);
+
+//  FindV0s(fSeeds,fEvent);  
+  //RemoveDouble(fSeeds,0.2,0.6,11);
+
+  //
   Int_t found = 0;
   for (Int_t i=0; i<nseed; i++) {
     AliTPCseed *pt=(AliTPCseed*)fSeeds->UncheckedAt(i), &t=*pt;    
@@ -4188,6 +5657,7 @@ TObjArray * AliTPCtrackerMI::Tracking()
 {
   //
   //
+  if (AliTPCReconstructor::GetRecoParam()->GetSpecialSeeding()) return TrackingSpecial();
   TStopwatch timer;
   timer.Start();
   Int_t nup=fOuterSec->GetNRows()+fInnerSec->GetNRows();
@@ -4311,12 +5781,12 @@ TObjArray * AliTPCtrackerMI::Tracking()
   cuts[0]=0.0080;
 
   // find secondaries
-  for (Int_t delta = 30; delta<70; delta+=10){
+  for (Int_t delta = 30; delta<90; delta+=10){
     //
     cuts[0] = 0.3;
-    cuts[1] = 1.5;
+    cuts[1] = 3.5;
     cuts[2] = 3.;
-    cuts[3] = 1.5;
+    cuts[3] = 3.5;
     arr = Tracking(4,nup-1-delta,nup-1-delta-gap,cuts,-1);
     SumTracks(seeds,arr);   
     SignClusters(seeds,fnumber,fdensity);   
@@ -4338,6 +5808,49 @@ TObjArray * AliTPCtrackerMI::Tracking()
 }
 
 
+TObjArray * AliTPCtrackerMI::TrackingSpecial()
+{
+  //
+  // seeding adjusted for laser and cosmic tests - short tracks with big inclination angle
+  // no primary vertex seeding tried
+  //
+  TStopwatch timer;
+  timer.Start();
+  Int_t nup=fOuterSec->GetNRows()+fInnerSec->GetNRows();
+
+  TObjArray * seeds = new TObjArray;
+  TObjArray * arr=0;
+  
+  Int_t   gap  = 15;
+  Float_t cuts[4];
+  Float_t fnumber  = 3.0;
+  Float_t fdensity = 3.0;
+  
+  // find secondaries
+  cuts[0] = AliTPCReconstructor::GetRecoParam()->GetMaxC();   // max curvature
+  cuts[1] = 3.5;    // max tan(phi) angle for seeding
+  cuts[2] = 3.;     // not used (cut on z primary vertex)     
+  cuts[3] = 3.5;    // max tan(theta) angle for seeding
+
+  for (Int_t delta = 0; nup-delta-gap-1>0; delta+=3){
+    //
+    arr = Tracking(4,nup-1-delta,nup-1-delta-gap,cuts,-1);
+    SumTracks(seeds,arr);   
+    SignClusters(seeds,fnumber,fdensity);   
+  } 
+  if (fDebug>0){
+    Info("Tracking()","\n\nSecondary seeding\t%d\n\n",seeds->GetEntriesFast());
+    timer.Print();
+    timer.Start();
+  }
+
+  return seeds;
+  //
+      
+}
+
+
 void AliTPCtrackerMI::SumTracks(TObjArray *arr1,TObjArray *arr2) const
 {
   //
@@ -4347,7 +5860,18 @@ void AliTPCtrackerMI::SumTracks(TObjArray *arr1,TObjArray *arr2) const
   for (Int_t i=0;i<nseed;i++){
     AliTPCseed *pt=(AliTPCseed*)arr2->UncheckedAt(i);    
     if (pt){
-      
+      //
+      // remove tracks with too big curvature
+      //
+      if (TMath::Abs(pt->GetC())>AliTPCReconstructor::GetRecoParam()->GetMaxC()){
+       delete arr2->RemoveAt(i);
+       continue;
+      }
+       // REMOVE VERY SHORT  TRACKS
+      if (pt->GetNumberOfClusters()<20){ 
+       delete arr2->RemoveAt(i);
+       continue;
+      }// patch 28 fev06
       // NORMAL ACTIVE TRACK
       if (pt->IsActive()){
        arr1->AddLast(arr2->RemoveAt(i));
@@ -4358,11 +5882,7 @@ void AliTPCtrackerMI::SumTracks(TObjArray *arr1,TObjArray *arr2) const
        delete arr2->RemoveAt(i);
        continue;
       }
-      // REMOVE VERY SHORT  TRACKS
-      if (pt->GetNumberOfClusters()<20){ 
-       delete arr2->RemoveAt(i);
-       continue;
-      }
+     
       // ENABLE ONLY ENOUGH GOOD STOPPED TRACKS
       if (pt->GetDensityFirst(20)>0.8 || pt->GetDensityFirst(30)>0.8 || pt->GetDensityFirst(40)>0.7)
        arr1->AddLast(arr2->RemoveAt(i));
@@ -4405,6 +5925,7 @@ void  AliTPCtrackerMI::ParallelTracking(TObjArray * arr, Int_t rfirst, Int_t rla
     for (Int_t i=0; i<nseed; i++) {
       AliTPCseed *pt=(AliTPCseed*)arr->UncheckedAt(i), &t=*pt;       
       if (!pt) continue;
+      if (nr==80) pt->UpdateReference();
       if (!pt->IsActive()) continue;
       //      if ( (fSectors ==fOuterSec) && (pt->fFirstPoint-fParam->GetNRowLow())<nr) continue;
       if (pt->fRelativeSector>17) {
@@ -4489,7 +6010,7 @@ Int_t AliTPCtrackerMI::PropagateBack(TObjArray * arr)
   Int_t nseed= arr->GetEntriesFast();
   for (Int_t i=0;i<nseed;i++){
     AliTPCseed *pt = (AliTPCseed*)arr->UncheckedAt(i);
-    if (pt) { 
+    if (pt&& pt->GetKinkIndex(0)<=0) { 
       //AliTPCseed *pt2 = new AliTPCseed(*pt);
       fSectors = fInnerSec;
       //FollowBackProlongation(*pt,fInnerSec->GetNRows()-1);
@@ -4499,7 +6020,14 @@ Int_t AliTPCtrackerMI::PropagateBack(TObjArray * arr)
       //       Error("PropagateBack","Not prolonged track %d",pt->GetLabel());
       //       FollowBackProlongation(*pt2,fInnerSec->GetNRows()+fOuterSec->GetNRows()-1);
       //}
-    }      
+    }
+    if (pt&& pt->GetKinkIndex(0)>0) {
+      AliESDkink * kink = fEvent->GetKink(pt->GetKinkIndex(0)-1);
+      pt->fFirstPoint = kink->GetTPCRow0();
+      fSectors = fInnerSec;
+      FollowBackProlongation(*pt,fInnerSec->GetNRows()+fOuterSec->GetNRows()-1);  
+    }
+    
   }
   return 0;
 }
@@ -4593,7 +6121,7 @@ void  AliTPCtrackerMI::GetShape(AliTPCseed * seed, Int_t row)
   Float_t padlength =  GetPadPitchLength(row);
   //
   Float_t sresy = (seed->fSector < fParam->GetNSector()/2) ? 0.2 :0.3;
-  Float_t angulary  = seed->GetSnp();
+  Double_t angulary  = seed->GetSnp();
   angulary = angulary*angulary/(1-angulary*angulary);
   seed->fCurrentSigmaY2 = sd2+padlength*padlength*angulary/12.+sresy*sresy;  
   //
@@ -4639,13 +6167,12 @@ Float_t  AliTPCtrackerMI::GetSigmaZ(AliTPCseed * seed)
 }
 
 
-
-
 //__________________________________________________________________________
-void AliTPCtrackerMI::CookLabel(AliTPCseed *t, Float_t wrong) const {
+void AliTPCtrackerMI::CookLabel(AliKalmanTrack *tk, Float_t wrong) const {
   //--------------------------------------------------------------------
   //This function "cooks" a track label. If label<0, this track is fake.
   //--------------------------------------------------------------------
+  AliTPCseed * t = (AliTPCseed*)tk;
   Int_t noc=t->GetNumberOfClusters();
   if (noc<10){
     //printf("\nnot founded prolongation\n\n\n");
@@ -4724,6 +6251,90 @@ void AliTPCtrackerMI::CookLabel(AliTPCseed *t, Float_t wrong) const {
 }
 
 
+//__________________________________________________________________________
+Int_t AliTPCtrackerMI::CookLabel(AliTPCseed *t, Float_t wrong,Int_t first, Int_t last) const {
+  //--------------------------------------------------------------------
+  //This function "cooks" a track label. If label<0, this track is fake.
+  //--------------------------------------------------------------------
+  Int_t noc=t->GetNumberOfClusters();
+  if (noc<10){
+    //printf("\nnot founded prolongation\n\n\n");
+    //t->Dump();
+    return -1;
+  }
+  Int_t lb[160];
+  Int_t mx[160];
+  AliTPCclusterMI *clusters[160];
+  //
+  for (Int_t i=0;i<160;i++) {
+    clusters[i]=0;
+    lb[i]=mx[i]=0;
+  }
+
+  Int_t i;
+  Int_t current=0;
+  for (i=0; i<160 && current<noc; i++) {
+    if (i<first) continue;
+    if (i>last)  continue;
+     Int_t index=t->GetClusterIndex2(i);
+     if (index<=0) continue; 
+     if (index&0x8000) continue;
+     //     
+     //clusters[current]=GetClusterMI(index);
+     if (t->fClusterPointer[i]){
+       clusters[current]=t->fClusterPointer[i];     
+       current++;
+     }
+  }
+  noc = current;
+  if (noc<5) return -1;
+  Int_t lab=123456789;
+  for (i=0; i<noc; i++) {
+    AliTPCclusterMI *c=clusters[i];
+    if (!c) continue;
+    lab=TMath::Abs(c->GetLabel(0));
+    Int_t j;
+    for (j=0; j<noc; j++) if (lb[j]==lab || mx[j]==0) break;
+    lb[j]=lab;
+    (mx[j])++;
+  }
+
+  Int_t max=0;
+  for (i=0; i<noc; i++) if (mx[i]>max) {max=mx[i]; lab=lb[i];}
+    
+  for (i=0; i<noc; i++) {
+    AliTPCclusterMI *c=clusters[i]; 
+    if (!c) continue;
+    if (TMath::Abs(c->GetLabel(1)) == lab ||
+        TMath::Abs(c->GetLabel(2)) == lab ) max++;
+  }
+
+  if ((1.- Float_t(max)/noc) > wrong) lab=-lab;
+
+  else {
+     Int_t tail=Int_t(0.10*noc);
+     max=0;
+     Int_t ind=0;
+     for (i=1; i<=160&&ind<tail; i++) {
+       //       AliTPCclusterMI *c=clusters[noc-i];
+       AliTPCclusterMI *c=clusters[i];
+       if (!c) continue;
+       if (lab == TMath::Abs(c->GetLabel(0)) ||
+           lab == TMath::Abs(c->GetLabel(1)) ||
+           lab == TMath::Abs(c->GetLabel(2))) max++;
+       ind++;
+     }
+     if (max < Int_t(0.5*tail)) lab=-lab;
+  }
+
+  //  t->SetLabel(lab);
+  return lab;
+  //  delete[] lb;
+  //delete[] mx;
+  //delete[] clusters;
+}
+
+
 Int_t  AliTPCtrackerMI::AliTPCSector::GetRowNumber(Double_t x) const 
 {
   //return pad row number for this x
@@ -4747,6 +6358,18 @@ Int_t  AliTPCtrackerMI::AliTPCSector::GetRowNumber(Double_t x) const
   }
 }
 
+Int_t  AliTPCtrackerMI::GetRowNumber(Double_t x[3]) const 
+{
+  //return pad row number for given x vector
+  Float_t phi = TMath::ATan2(x[1],x[0]);
+  if(phi<0) phi=2.*TMath::Pi()+phi;
+  //  Get the local angle in the sector philoc
+  const Float_t kRaddeg = 180/3.14159265358979312;
+  Float_t phiangle   = (Int_t (phi*kRaddeg/20.) + 0.5)*20./kRaddeg;
+  Double_t localx    = x[0]*TMath::Cos(phiangle)-x[1]*TMath::Sin(phiangle);
+  return GetRowNumber(localx);
+}
+
 //_________________________________________________________________________
 void AliTPCtrackerMI::AliTPCSector::Setup(const AliTPCParam *par, Int_t f) {
   //-----------------------------------------------------------------------
@@ -4873,10 +6496,16 @@ AliTPCclusterMI * AliTPCtrackerMI::AliTPCRow::FindNearest2(Double_t y, Double_t
   // Return the index of the nearest cluster in z y 
   //-----------------------------------------------------------------------
   Float_t maxdistance = roady*roady + roadz*roadz;
-  Int_t iz1 = TMath::Max(fFastCluster[Int_t(z-roadz+254.5)]-1,0);
-  Int_t iz2 = TMath::Min(fFastCluster[Int_t(z+roadz+255.5)]+1,fN);
-
   AliTPCclusterMI *cl =0;
+
+  //PH Check boundaries. 510 is the size of fFastCluster
+  Int_t iz1 = Int_t(z-roadz+254.5);
+  if (iz1<0 || iz1>=510) return cl;
+  iz1 = TMath::Max(fFastCluster[iz1]-1,0);
+  Int_t iz2 = Int_t(z+roadz+255.5);
+  if (iz2<0 || iz2>=510) return cl;
+  iz2 = TMath::Min(fFastCluster[iz2]+1,fN);
+
   //FindNearest3(y,z,roady,roadz,index);
   //  for (Int_t i=Find(z-roadz); i<fN; i++) {
   for (Int_t i=iz1; i<iz2; i++) {
@@ -4925,642 +6554,12 @@ AliTPCclusterMI * AliTPCtrackerMI::AliTPCRow::FindNearest3(Double_t y, Double_t
 
 
 
-AliTPCseed::AliTPCseed():AliTPCtrack(){
-  //
-  fRow=0; 
-  fRemoval =0; 
-  for (Int_t i=0;i<200;i++) SetClusterIndex2(i,-3);
-  for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
-
-  fPoints = 0;
-  fEPoints = 0;
-  fNFoundable =0;
-  fNShared  =0;
-  fRemoval = 0;
-  fSort =0;
-  fFirstPoint =0;
-  fNoCluster =0;
-  fBSigned = kFALSE;
-  fSeed1 =-1;
-  fSeed2 =-1;
-  fCurrentCluster =0;
-  fCurrentSigmaY2=0;
-  fCurrentSigmaZ2=0;
-}
-
-AliTPCseed::AliTPCseed(const AliTPCtrack &t):AliTPCtrack(t){
-  //
-  //copy constructor
-  fPoints = 0;
-  fEPoints = 0;
-  fNShared  =0; 
-  //  fTrackPoints =0;
-  fRemoval =0;
-  fSort =0;
-  for (Int_t i=0;i<160;i++) {
-    fClusterPointer[i] = 0;
-    Int_t index = t.GetClusterIndex(i);
-    if (index>=-1){ 
-      SetClusterIndex2(i,index);
-    }
-    else{
-      SetClusterIndex2(i,-3); 
-    }    
-  }
-  fFirstPoint =0;
-  fNoCluster =0;
-  fBSigned = kFALSE;
-  fSeed1 =-1;
-  fSeed2 =-1;
-  fCurrentCluster =0;
-  fCurrentSigmaY2=0;
-  fCurrentSigmaZ2=0;
-}
-
-AliTPCseed::AliTPCseed(const AliKalmanTrack &t, Double_t a):AliTPCtrack(t,a){
-  //
-  //copy constructor
-  fRow=0;
-  for (Int_t i=0;i<160;i++) {
-    fClusterPointer[i] = 0;
-    Int_t index = t.GetClusterIndex(i);
-    SetClusterIndex2(i,index);
-  }
-  
-  fPoints = 0;
-  fEPoints = 0;
-  fNFoundable =0; 
-  fNShared  =0; 
-  //  fTrackPoints =0;
-  fRemoval =0;
-  fSort = 0;
-  fFirstPoint =0;
-  fNoCluster =0;
-  fBSigned = kFALSE;
-  fSeed1 =-1;
-  fSeed2 =-1;
-  fCurrentCluster =0;
-  fCurrentSigmaY2=0;
-  fCurrentSigmaZ2=0;
-
-}
-
-AliTPCseed::AliTPCseed(UInt_t index, const Double_t xx[5], const Double_t cc[15], 
-                                       Double_t xr, Double_t alpha):      
-  AliTPCtrack(index, xx, cc, xr, alpha) {
-  //
-  //
-  //constructor
-  fRow =0;
-  for (Int_t i=0;i<200;i++) SetClusterIndex2(i,-3);
-  for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
-  fPoints = 0;
-  fEPoints = 0;
-  fNFoundable =0;
-  fNShared  = 0;
-  //  fTrackPoints =0;
-  fRemoval =0;
-  fSort =0;
-  fFirstPoint =0;
-  //  fHelixIn = new TClonesArray("AliHelix",0);
-  //fHelixOut = new TClonesArray("AliHelix",0);
-  fNoCluster =0;
-  fBSigned = kFALSE;
-  fSeed1 =-1;
-  fSeed2 =-1;
-  fCurrentCluster =0;
-  fCurrentSigmaY2=0;
-  fCurrentSigmaZ2=0;
-}
-
-AliTPCseed::~AliTPCseed(){
-  //
-  // destructor
-  if (fPoints) delete fPoints;
-  fPoints =0;
-  if (fEPoints) delete fEPoints;
-  fEPoints = 0;
-  fNoCluster =0;
-}
-
-AliTPCTrackerPoint * AliTPCseed::GetTrackPoint(Int_t i)
-{
-  //
-  // 
-  return &fTrackPoints[i];
-}
-
-void AliTPCseed::RebuildSeed()
-{
-  //
-  // rebuild seed to be ready for storing
-  AliTPCclusterMI cldummy;
-  cldummy.SetQ(0);
-  AliTPCTrackPoint pdummy;
-  pdummy.GetTPoint().fIsShared = 10;
-  for (Int_t i=0;i<160;i++){
-    AliTPCclusterMI * cl0 = fClusterPointer[i];
-    AliTPCTrackPoint *trpoint = (AliTPCTrackPoint*)fPoints->UncheckedAt(i);     
-    if (cl0){
-      trpoint->GetTPoint() = *(GetTrackPoint(i));
-      trpoint->GetCPoint() = *cl0;
-      trpoint->GetCPoint().SetQ(TMath::Abs(cl0->GetQ()));
-    }
-    else{
-      *trpoint = pdummy;
-      trpoint->GetCPoint()= cldummy;
-    }
-    
-  }
-
-}
-
-
-Double_t AliTPCseed::GetDensityFirst(Int_t n)
-{
-  //
-  //
-  // return cluster for n rows bellow first point
-  Int_t nfoundable = 1;
-  Int_t nfound      = 1;
-  for (Int_t i=fLastPoint-1;i>0&&nfoundable<n; i--){
-    Int_t index = GetClusterIndex2(i);
-    if (index!=-1) nfoundable++;
-    if (index>0) nfound++;
-  }
-  if (nfoundable<n) return 0;
-  return Double_t(nfound)/Double_t(nfoundable);
-
-}
 
+// AliTPCTrackerPoint * AliTPCseed::GetTrackPoint(Int_t i)
+// {
+//   //
+//   // 
+//   return &fTrackPoints[i];
+// }
 
-void AliTPCseed::GetClusterStatistic(Int_t first, Int_t last, Int_t &found, Int_t &foundable, Int_t &shared, Bool_t plus2)
-{
-  // get cluster stat.  on given region
-  //
-  found       = 0;
-  foundable   = 0;
-  shared      =0;
-  for (Int_t i=first;i<last; i++){
-    Int_t index = GetClusterIndex2(i);
-    if (index!=-1) foundable++;
-    if (fClusterPointer[i]) {
-      found++;
-    }
-    else 
-      continue;
 
-    if (fClusterPointer[i]->IsUsed(10)) {
-      shared++;
-      continue;
-    }
-    if (!plus2) continue; //take also neighborhoud
-    //
-    if ( (i>0) && fClusterPointer[i-1]){
-      if (fClusterPointer[i-1]->IsUsed(10)) {
-       shared++;
-       continue;
-      }
-    }
-    if ( fClusterPointer[i+1]){
-      if (fClusterPointer[i+1]->IsUsed(10)) {
-       shared++;
-       continue;
-      }
-    }
-    
-  }
-  //if (shared>found){
-    //Error("AliTPCseed::GetClusterStatistic","problem\n");
-  //}
-}
-
-//_____________________________________________________________________________
-void AliTPCseed::CookdEdx(Double_t low, Double_t up,Int_t i1, Int_t i2, Bool_t onlyused) {
-  //-----------------------------------------------------------------
-  // This funtion calculates dE/dX within the "low" and "up" cuts.
-  //-----------------------------------------------------------------
-
-  Float_t amp[200];
-  Float_t angular[200];
-  Float_t weight[200];
-  Int_t index[200];
-  //Int_t nc = 0;
-  //  TClonesArray & arr = *fPoints; 
-  Float_t meanlog = 100.;
-  
-  Float_t mean[4]  = {0,0,0,0};
-  Float_t sigma[4] = {1000,1000,1000,1000};
-  Int_t nc[4]      = {0,0,0,0};
-  Float_t norm[4]    = {1000,1000,1000,1000};
-  //
-  //
-  fNShared =0;
-
-  for (Int_t of =0; of<4; of++){    
-    for (Int_t i=of+i1;i<i2;i+=4)
-      {
-       Int_t index = fIndex[i];
-       if (index<0||index&0x8000) continue;
-
-       //AliTPCTrackPoint * point = (AliTPCTrackPoint *) arr.At(i);
-       AliTPCTrackerPoint * point = GetTrackPoint(i);
-       //AliTPCTrackerPoint * pointm = GetTrackPoint(i-1);
-       //AliTPCTrackerPoint * pointp = 0;
-       //if (i<159) pointp = GetTrackPoint(i+1);
-
-       if (point==0) continue;
-       AliTPCclusterMI * cl = fClusterPointer[i];
-       if (cl==0) continue;    
-       if (onlyused && (!cl->IsUsed(10))) continue;
-       if (cl->IsUsed(11)) {
-         fNShared++;
-         continue;
-       }
-       Int_t   type   = cl->GetType();
-       //if (point->fIsShared){
-       //  fNShared++;
-       //  continue;
-       //}
-       //if (pointm) 
-       //  if (pointm->fIsShared) continue;
-       //if (pointp) 
-       //  if (pointp->fIsShared) continue;
-
-       if (type<0) continue;
-       //if (type>10) continue;       
-       //if (point->GetErrY()==0) continue;
-       //if (point->GetErrZ()==0) continue;
-
-       //Float_t ddy = (point->GetY()-cl->GetY())/point->GetErrY();
-       //Float_t ddz = (point->GetZ()-cl->GetZ())/point->GetErrZ();
-       //if ((ddy*ddy+ddz*ddz)>10) continue; 
-
-
-       //      if (point->GetCPoint().GetMax()<5) continue;
-       if (cl->GetMax()<5) continue;
-       Float_t angley = point->GetAngleY();
-       Float_t anglez = point->GetAngleZ();
-
-       Float_t rsigmay2 =  point->GetSigmaY();
-       Float_t rsigmaz2 =  point->GetSigmaZ();
-       /*
-       Float_t ns = 1.;
-       if (pointm){
-         rsigmay +=  pointm->GetTPoint().GetSigmaY();
-         rsigmaz +=  pointm->GetTPoint().GetSigmaZ();
-         ns+=1.;
-       }
-       if (pointp){
-         rsigmay +=  pointp->GetTPoint().GetSigmaY();
-         rsigmaz +=  pointp->GetTPoint().GetSigmaZ();
-         ns+=1.;
-       }
-       rsigmay/=ns;
-       rsigmaz/=ns;
-       */
-
-       Float_t rsigma = TMath::Sqrt(rsigmay2*rsigmaz2);
-
-       Float_t ampc   = 0;     // normalization to the number of electrons
-       if (i>64){
-         //      ampc = 1.*point->GetCPoint().GetMax();
-         ampc = 1.*cl->GetMax();
-         //ampc = 1.*point->GetCPoint().GetQ();          
-         //      AliTPCClusterPoint & p = point->GetCPoint();
-         //      Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.6)) - TMath::Abs(p.GetY()/0.6)+0.5);
-         // Float_t iz =  (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
-         //Float_t dz = 
-         //  TMath::Abs( Int_t(iz) - iz + 0.5);
-         //ampc *= 1.15*(1-0.3*dy);
-         //ampc *= 1.15*(1-0.3*dz);
-         //      Float_t zfactor = (1.05-0.0004*TMath::Abs(point->GetCPoint().GetZ()));
-         //ampc               *=zfactor; 
-       }
-       else{ 
-         //ampc = 1.0*point->GetCPoint().GetMax(); 
-         ampc = 1.0*cl->GetMax(); 
-         //ampc = 1.0*point->GetCPoint().GetQ(); 
-         //AliTPCClusterPoint & p = point->GetCPoint();
-         // Float_t dy = TMath::Abs(Int_t( TMath::Abs(p.GetY()/0.4)) - TMath::Abs(p.GetY()/0.4)+0.5);
-         //Float_t iz =  (250.0-TMath::Abs(p.GetZ())+0.11)/0.566;
-         //Float_t dz = 
-         //  TMath::Abs( Int_t(iz) - iz + 0.5);
-
-         //ampc *= 1.15*(1-0.3*dy);
-         //ampc *= 1.15*(1-0.3*dz);
-         //    Float_t zfactor = (1.02-0.000*TMath::Abs(point->GetCPoint().GetZ()));
-         //ampc               *=zfactor; 
-
-       }
-       ampc *= 2.0;     // put mean value to channel 50
-       //ampc *= 0.58;     // put mean value to channel 50
-       Float_t w      =  1.;
-       //      if (type>0)  w =  1./(type/2.-0.5); 
-       //      Float_t z = TMath::Abs(cl->GetZ());
-       if (i<64) {
-         ampc /= 0.6;
-         //ampc /= (1+0.0008*z);
-       } else
-         if (i>128){
-           ampc /=1.5;
-           //ampc /= (1+0.0008*z);
-         }else{
-           //ampc /= (1+0.0008*z);
-         }
-       
-       if (type<0) {  //amp at the border - lower weight
-         // w*= 2.;
-         
-         continue;
-       }
-       if (rsigma>1.5) ampc/=1.3;  // if big backround
-       amp[nc[of]]        = ampc;
-       angular[nc[of]]    = TMath::Sqrt(1.+angley*angley+anglez*anglez);
-       weight[nc[of]]     = w;
-       nc[of]++;
-      }
-    
-    TMath::Sort(nc[of],amp,index,kFALSE);
-    Float_t sumamp=0;
-    Float_t sumamp2=0;
-    Float_t sumw=0;
-    //meanlog = amp[index[Int_t(nc[of]*0.33)]];
-    meanlog = 50;
-    for (Int_t i=int(nc[of]*low+0.5);i<int(nc[of]*up+0.5);i++){
-      Float_t ampl      = amp[index[i]]/angular[index[i]];
-      ampl              = meanlog*TMath::Log(1.+ampl/meanlog);
-      //
-      sumw    += weight[index[i]]; 
-      sumamp  += weight[index[i]]*ampl;
-      sumamp2 += weight[index[i]]*ampl*ampl;
-      norm[of]    += angular[index[i]]*weight[index[i]];
-    }
-    if (sumw<1){ 
-      SetdEdx(0);  
-    }
-    else {
-      norm[of] /= sumw;
-      mean[of]  = sumamp/sumw;
-      sigma[of] = sumamp2/sumw-mean[of]*mean[of];
-      if (sigma[of]>0.1) 
-       sigma[of] = TMath::Sqrt(sigma[of]);
-      else
-       sigma[of] = 1000;
-      
-    mean[of] = (TMath::Exp(mean[of]/meanlog)-1)*meanlog;
-    //mean  *=(1-0.02*(sigma/(mean*0.17)-1.));
-    //mean *=(1-0.1*(norm-1.));
-    }
-  }
-
-  Float_t dedx =0;
-  fSdEdx =0;
-  fMAngular =0;
-  //  mean[0]*= (1-0.05*(sigma[0]/(0.01+mean[1]*0.18)-1));
-  //  mean[1]*= (1-0.05*(sigma[1]/(0.01+mean[0]*0.18)-1));
-
-  
-  //  dedx = (mean[0]* TMath::Sqrt((1.+nc[0]))+ mean[1]* TMath::Sqrt((1.+nc[1])) )/ 
-  //  (  TMath::Sqrt((1.+nc[0]))+TMath::Sqrt((1.+nc[1])));
-
-  Int_t norm2 = 0;
-  Int_t norm3 = 0;
-  for (Int_t i =0;i<4;i++){
-    if (nc[i]>2&&nc[i]<1000){
-      dedx      += mean[i] *nc[i];
-      fSdEdx    += sigma[i]*(nc[i]-2);
-      fMAngular += norm[i] *nc[i];    
-      norm2     += nc[i];
-      norm3     += nc[i]-2;
-    }
-    fDEDX[i]  = mean[i];             
-    fSDEDX[i] = sigma[i];            
-    fNCDEDX[i]= nc[i]; 
-  }
-
-  if (norm3>0){
-    dedx   /=norm2;
-    fSdEdx /=norm3;
-    fMAngular/=norm2;
-  }
-  else{
-    SetdEdx(0);
-    return;
-  }
-  //  Float_t dedx1 =dedx;
-  /*
-  dedx =0;
-  for (Int_t i =0;i<4;i++){
-    if (nc[i]>2&&nc[i]<1000){
-      mean[i]   = mean[i]*(1-0.12*(sigma[i]/(fSdEdx)-1.));
-      dedx      += mean[i] *nc[i];
-    }
-    fDEDX[i]  = mean[i];                
-  }
-  dedx /= norm2;
-  */
-
-  
-  SetdEdx(dedx);
-    
-  //mi deDX
-
-
-
-  //Very rough PID
-  Double_t p=TMath::Sqrt((1.+ GetTgl()*GetTgl())/(Get1Pt()*Get1Pt()));
-
-  if (p<0.6) {
-    if (dedx < 39.+ 12./(p+0.25)/(p+0.25)) { SetMass(0.13957); return;}
-    if (dedx < 39.+ 12./p/p) { SetMass(0.49368); return;}
-    SetMass(0.93827); return;
-  }
-
-  if (p<1.2) {
-    if (dedx < 39.+ 12./(p+0.25)/(p+0.25)) { SetMass(0.13957); return;}
-    SetMass(0.93827); return;
-  }
-
-  SetMass(0.13957); return;
-
-}
-
-
-
-/*
-
-
-
-void AliTPCseed::CookdEdx2(Double_t low, Double_t up) {
-  //-----------------------------------------------------------------
-  // This funtion calculates dE/dX within the "low" and "up" cuts.
-  //-----------------------------------------------------------------
-
-  Float_t amp[200];
-  Float_t angular[200];
-  Float_t weight[200];
-  Int_t index[200];
-  Bool_t inlimit[200];
-  for (Int_t i=0;i<200;i++) inlimit[i]=kFALSE;
-  for (Int_t i=0;i<200;i++) amp[i]=10000;
-  for (Int_t i=0;i<200;i++) angular[i]= 1;;
-  
-
-  //
-  Float_t meanlog = 100.;
-  Int_t indexde[4]={0,64,128,160};
-
-  Float_t amean     =0;
-  Float_t asigma    =0;
-  Float_t anc       =0;
-  Float_t anorm     =0;
-
-  Float_t mean[4]  = {0,0,0,0};
-  Float_t sigma[4] = {1000,1000,1000,1000};
-  Int_t nc[4]      = {0,0,0,0};
-  Float_t norm[4]    = {1000,1000,1000,1000};
-  //
-  //
-  fNShared =0;
-
-  //  for (Int_t of =0; of<3; of++){    
-  //  for (Int_t i=indexde[of];i<indexde[of+1];i++)
-  for (Int_t i =0; i<160;i++)
-    {
-       AliTPCTrackPoint * point = GetTrackPoint(i);
-       if (point==0) continue;
-       if (point->fIsShared){
-         fNShared++;     
-         continue;
-       }
-       Int_t   type   = point->GetCPoint().GetType();
-       if (type<0) continue;
-       if (point->GetCPoint().GetMax()<5) continue;
-       Float_t angley = point->GetTPoint().GetAngleY();
-       Float_t anglez = point->GetTPoint().GetAngleZ();
-       Float_t rsigmay =  point->GetCPoint().GetSigmaY();
-       Float_t rsigmaz =  point->GetCPoint().GetSigmaZ();
-       Float_t rsigma = TMath::Sqrt(rsigmay*rsigmaz);
-
-       Float_t ampc   = 0;     // normalization to the number of electrons
-       if (i>64){
-         ampc =  point->GetCPoint().GetMax();
-       }
-       else{ 
-         ampc = point->GetCPoint().GetMax(); 
-       }
-       ampc *= 2.0;     // put mean value to channel 50
-       //      ampc *= 0.565;     // put mean value to channel 50
-
-       Float_t w      =  1.;
-       Float_t z = TMath::Abs(point->GetCPoint().GetZ());
-       if (i<64) {
-         ampc /= 0.63;
-       } else
-         if (i>128){
-           ampc /=1.51;
-         }             
-       if (type<0) {  //amp at the border - lower weight                 
-         continue;
-       }
-       if (rsigma>1.5) ampc/=1.3;  // if big backround
-       angular[i]    = TMath::Sqrt(1.+angley*angley+anglez*anglez);
-       amp[i]        = ampc/angular[i];
-       weight[i]     = w;
-       anc++;
-    }
-
-  TMath::Sort(159,amp,index,kFALSE);
-  for (Int_t i=int(anc*low+0.5);i<int(anc*up+0.5);i++){      
-    inlimit[index[i]] = kTRUE;  // take all clusters
-  }
-  
-  //  meanlog = amp[index[Int_t(anc*0.3)]];
-  meanlog =10000.;
-  for (Int_t of =0; of<3; of++){    
-    Float_t sumamp=0;
-    Float_t sumamp2=0;
-    Float_t sumw=0;    
-   for (Int_t i=indexde[of];i<indexde[of+1];i++)
-      {
-       if (inlimit[i]==kFALSE) continue;
-       Float_t ampl      = amp[i];
-       ///angular[i];
-       ampl              = meanlog*TMath::Log(1.+ampl/meanlog);
-       //
-       sumw    += weight[i]; 
-       sumamp  += weight[i]*ampl;
-       sumamp2 += weight[i]*ampl*ampl;
-       norm[of]    += angular[i]*weight[i];
-       nc[of]++;
-      }
-   if (sumw<1){ 
-     SetdEdx(0);  
-   }
-   else {
-     norm[of] /= sumw;
-     mean[of]  = sumamp/sumw;
-     sigma[of] = sumamp2/sumw-mean[of]*mean[of];
-     if (sigma[of]>0.1) 
-       sigma[of] = TMath::Sqrt(sigma[of]);
-     else
-       sigma[of] = 1000;      
-     mean[of] = (TMath::Exp(mean[of]/meanlog)-1)*meanlog;
-   }
-  }
-    
-  Float_t dedx =0;
-  fSdEdx =0;
-  fMAngular =0;
-  //
-  Int_t norm2 = 0;
-  Int_t norm3 = 0;
-  Float_t www[3] = {12.,14.,17.};
-  //Float_t www[3] = {1.,1.,1.};
-
-  for (Int_t i =0;i<3;i++){
-    if (nc[i]>2&&nc[i]<1000){
-      dedx      += mean[i] *nc[i]*www[i]/sigma[i];
-      fSdEdx    += sigma[i]*(nc[i]-2)*www[i]/sigma[i];
-      fMAngular += norm[i] *nc[i];    
-      norm2     += nc[i]*www[i]/sigma[i];
-      norm3     += (nc[i]-2)*www[i]/sigma[i];
-    }
-    fDEDX[i]  = mean[i];             
-    fSDEDX[i] = sigma[i];            
-    fNCDEDX[i]= nc[i]; 
-  }
-
-  if (norm3>0){
-    dedx   /=norm2;
-    fSdEdx /=norm3;
-    fMAngular/=norm2;
-  }
-  else{
-    SetdEdx(0);
-    return;
-  }
-  //  Float_t dedx1 =dedx;
-  
-  dedx =0;
-  Float_t norm4 = 0;
-  for (Int_t i =0;i<3;i++){
-    if (nc[i]>2&&nc[i]<1000&&sigma[i]>3){
-      //mean[i]   = mean[i]*(1+0.08*(sigma[i]/(fSdEdx)-1.));
-      dedx      += mean[i] *(nc[i])/(sigma[i]);
-      norm4     += (nc[i])/(sigma[i]);
-    }
-    fDEDX[i]  = mean[i];                
-  }
-  if (norm4>0) dedx /= norm4;
-  
-
-  
-  SetdEdx(dedx);
-    
-  //mi deDX
-
-}
-
-*/