--- /dev/null
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
+
+
+
+
+//-----------------------------------------------------------------
+//
+// Implementation of the TPC seed class
+// This class is used by the AliTPCtrackerMI class
+// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
+//-----------------------------------------------------------------
+#include "TClonesArray.h"
+#include "TGraphErrors.h"
+#include "AliTPCseed.h"
+#include "AliTPCReconstructor.h"
+#include "AliTPCClusterParam.h"
+#include "AliTPCCalPad.h"
+#include "AliTPCCalROC.h"
+#include "AliTPCcalibDB.h"
+#include "AliTPCParam.h"
+#include "AliMathBase.h"
+#include "AliTPCTransform.h"
+#include "AliSplineFit.h"
+#include "AliCDBManager.h"
+#include "AliTPCcalibDButil.h"
+
+
+ClassImp(AliTPCseed)
+
+
+
+AliTPCseed::AliTPCseed():
+ AliTPCtrack(),
+ fEsd(0x0),
+ fClusterOwner(kFALSE),
+ fRow(0),
+ fSector(-1),
+ fRelativeSector(-1),
+ fCurrentSigmaY2(1e10),
+ fCurrentSigmaZ2(1e10),
+ fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
+ fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
+ fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
+ fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
+ //
+ fErrorY2(1e10),
+ fErrorZ2(1e10),
+ fCurrentCluster(0x0),
+ fCurrentClusterIndex1(-1),
+ fInDead(kFALSE),
+ fIsSeeding(kFALSE),
+ fNoCluster(0),
+ fSort(0),
+ fBSigned(kFALSE),
+ fSeedType(0),
+ fSeed1(-1),
+ fSeed2(-1),
+ fMAngular(0),
+ fCircular(0),
+ fPoolID(-1)
+{
+ //
+ for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
+ for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
+ for (Int_t i=0;i<3;i++) fKinkIndexes[i]=0;
+ for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=0.2;
+ for (Int_t i=0;i<4;i++) {
+ fDEDX[i] = 0.;
+ fSDEDX[i] = 1e10;
+ fNCDEDX[i] = 0;
+ fNCDEDXInclThres[i] = 0;
+ }
+ fDEDX[4] = 0;
+ for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
+}
+
+AliTPCseed::AliTPCseed(const AliTPCseed &s, Bool_t clusterOwner):
+ AliTPCtrack(s),
+ fEsd(0x0),
+ fClusterOwner(clusterOwner),
+ fRow(0),
+ fSector(-1),
+ fRelativeSector(-1),
+ fCurrentSigmaY2(-1),
+ fCurrentSigmaZ2(-1),
+ fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
+ fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
+ fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
+ fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
+ fErrorY2(1e10),
+ fErrorZ2(1e10),
+ fCurrentCluster(0x0),
+ fCurrentClusterIndex1(-1),
+ fInDead(kFALSE),
+ fIsSeeding(kFALSE),
+ fNoCluster(0),
+ fSort(0),
+ fBSigned(kFALSE),
+ fSeedType(0),
+ fSeed1(-1),
+ fSeed2(-1),
+ fMAngular(0),
+ fCircular(0),
+ fPoolID(-1)
+{
+ //---------------------
+ // dummy copy constructor
+ //-------------------------
+ for (Int_t i=0;i<160;i++) {
+ fClusterPointer[i]=0;
+ if (fClusterOwner){
+ if (s.fClusterPointer[i])
+ fClusterPointer[i] = new AliTPCclusterMI(*(s.fClusterPointer[i]));
+ }else{
+ fClusterPointer[i] = s.fClusterPointer[i];
+ }
+ fTrackPoints[i] = s.fTrackPoints[i];
+ }
+ for (Int_t i=0;i<160;i++) fIndex[i] = s.fIndex[i];
+ for (Int_t i=0;i<AliPID::kSPECIES;i++) fTPCr[i]=s.fTPCr[i];
+ for (Int_t i=0;i<4;i++) {
+ fDEDX[i] = s.fDEDX[i];
+ fSDEDX[i] = s.fSDEDX[i];
+ fNCDEDX[i] = s.fNCDEDX[i];
+ fNCDEDXInclThres[i] = s.fNCDEDXInclThres[i];
+ }
+ fDEDX[4] = s.fDEDX[4];
+ for (Int_t i=0;i<12;i++) fOverlapLabels[i] = s.fOverlapLabels[i];
+
+}
+
+
+AliTPCseed::AliTPCseed(const AliTPCtrack &t):
+ AliTPCtrack(t),
+ fEsd(0x0),
+ fClusterOwner(kFALSE),
+ fRow(0),
+ fSector(-1),
+ fRelativeSector(-1),
+ fCurrentSigmaY2(-1),
+ fCurrentSigmaZ2(-1),
+ fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
+ fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
+ fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
+ fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
+ fErrorY2(1e10),
+ fErrorZ2(1e10),
+ fCurrentCluster(0x0),
+ fCurrentClusterIndex1(-1),
+ fInDead(kFALSE),
+ fIsSeeding(kFALSE),
+ fNoCluster(0),
+ fSort(0),
+ fBSigned(kFALSE),
+ fSeedType(0),
+ fSeed1(-1),
+ fSeed2(-1),
+ fMAngular(0),
+ fCircular(0),
+ fPoolID(-1)
+{
+ //
+ // Constructor from AliTPCtrack
+ //
+ fFirstPoint =0;
+ for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
+ 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);
+ }
+ }
+ for (Int_t i=0;i<4;i++) {
+ fDEDX[i] = 0.;
+ fSDEDX[i] = 1e10;
+ fNCDEDX[i] = 0;
+ fNCDEDXInclThres[i] = 0;
+ }
+ fDEDX[4] = 0;
+ for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
+}
+
+AliTPCseed::AliTPCseed(Double_t xr, Double_t alpha, const Double_t xx[5],
+ const Double_t cc[15], Int_t index):
+ AliTPCtrack(xr, alpha, xx, cc, index),
+ fEsd(0x0),
+ fClusterOwner(kFALSE),
+ fRow(0),
+ fSector(-1),
+ fRelativeSector(-1),
+ fCurrentSigmaY2(-1),
+ fCurrentSigmaZ2(-1),
+ fCMeanSigmaY2p30(-1.), //! current mean sigma Y2 - mean30%
+ fCMeanSigmaZ2p30(-1.), //! current mean sigma Z2 - mean30%
+ fCMeanSigmaY2p30R(-1.), //! current mean sigma Y2 - mean2%
+ fCMeanSigmaZ2p30R(-1.), //! current mean sigma Z2 - mean2%
+ fErrorY2(1e10),
+ fErrorZ2(1e10),
+ fCurrentCluster(0x0),
+ fCurrentClusterIndex1(-1),
+ fInDead(kFALSE),
+ fIsSeeding(kFALSE),
+ fNoCluster(0),
+ fSort(0),
+ fBSigned(kFALSE),
+ fSeedType(0),
+ fSeed1(-1),
+ fSeed2(-1),
+ fMAngular(0),
+ fCircular(0),
+ fPoolID(-1)
+{
+ //
+ // Constructor
+ //
+ fFirstPoint =0;
+ for (Int_t i=0;i<160;i++) SetClusterIndex2(i,-3);
+ for (Int_t i=0;i<160;i++) fClusterPointer[i]=0;
+ for (Int_t i=0;i<5;i++) fTPCr[i]=0.2;
+ for (Int_t i=0;i<4;i++) {
+ fDEDX[i] = 0.;
+ fSDEDX[i] = 1e10;
+ fNCDEDX[i] = 0;
+ fNCDEDXInclThres[i] = 0;
+ }
+ fDEDX[4] = 0;
+ for (Int_t i=0;i<12;i++) fOverlapLabels[i] = -1;
+}
+
+AliTPCseed::~AliTPCseed(){
+ //
+ // destructor
+ fNoCluster =0;
+ if (fClusterOwner){
+ for (Int_t icluster=0; icluster<160; icluster++){
+ delete fClusterPointer[icluster];
+ }
+ }
+
+}
+//_________________________________________________
+AliTPCseed & AliTPCseed::operator=(const AliTPCseed ¶m)
+{
+ //
+ // assignment operator
+ // don't touch pool ID
+ //
+ if(this!=¶m){
+ AliTPCtrack::operator=(param);
+ fEsd =param.fEsd;
+ fClusterOwner = param.fClusterOwner;
+ if (!fClusterOwner) for(Int_t i = 0;i<160;++i)fClusterPointer[i] = param.fClusterPointer[i];
+ else for(Int_t i = 0;i<160;++i) {
+ delete fClusterPointer[i];
+ fClusterPointer[i] = new AliTPCclusterMI(*(param.fClusterPointer[i]));
+ }
+ // leave out fPoint, they are also not copied in the copy ctor...
+ // but deleted in the dtor... strange...
+ fRow = param.fRow;
+ fSector = param.fSector;
+ fRelativeSector = param.fRelativeSector;
+ fCurrentSigmaY2 = param.fCurrentSigmaY2;
+ fCurrentSigmaZ2 = param.fCurrentSigmaZ2;
+ fErrorY2 = param.fErrorY2;
+ fErrorZ2 = param.fErrorZ2;
+ fCurrentCluster = param.fCurrentCluster; // this is not allocated by AliTPCSeed
+ fCurrentClusterIndex1 = param.fCurrentClusterIndex1;
+ fInDead = param.fInDead;
+ fIsSeeding = param.fIsSeeding;
+ fNoCluster = param.fNoCluster;
+ fSort = param.fSort;
+ fBSigned = param.fBSigned;
+ for(Int_t i = 0;i<4;++i){
+ fDEDX[i] = param.fDEDX[i];
+ fSDEDX[i] = param.fSDEDX[i];
+ fNCDEDX[i] = param.fNCDEDX[i];
+ fNCDEDXInclThres[i] = param.fNCDEDXInclThres[i];
+ }
+ fDEDX[4] = param.fDEDX[4];
+ for(Int_t i = 0;i<AliPID::kSPECIES;++i)fTPCr[i] = param.fTPCr[i];
+
+ fSeedType = param.fSeedType;
+ fSeed1 = param.fSeed1;
+ fSeed2 = param.fSeed2;
+ for(Int_t i = 0;i<12;++i)fOverlapLabels[i] = param.fOverlapLabels[i];
+ fMAngular = param.fMAngular;
+ fCircular = param.fCircular;
+ for(int i = 0;i<160;++i)fTrackPoints[i] = param.fTrackPoints[i];
+ }
+ return (*this);
+}
+//____________________________________________________
+AliTPCTrackerPoint * AliTPCseed::GetTrackPoint(Int_t i)
+{
+ //
+ //
+ return &fTrackPoints[i];
+}
+
+
+
+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);
+
+}
+
+
+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 (index&0x8000) continue;
+ 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::Reset(Bool_t all)
+{
+ //
+ //
+ SetNumberOfClusters(0);
+ fNFoundable = 0;
+ SetChi2(0);
+ ResetCovariance(10.);
+ /*
+ if (fTrackPoints){
+ for (Int_t i=0;i<8;i++){
+ delete [] fTrackPoints[i];
+ }
+ delete fTrackPoints;
+ fTrackPoints =0;
+ }
+ */
+
+ if (all){
+ for (Int_t i=200;i--;) SetClusterIndex2(i,-3);
+ if (!fClusterOwner) for (Int_t i=160;i--;) fClusterPointer[i]=0;
+ else for (Int_t i=160;i--;) {delete fClusterPointer[i]; fClusterPointer[i]=0;}
+ }
+
+}
+
+
+void AliTPCseed::Modify(Double_t factor)
+{
+
+ //------------------------------------------------------------------
+ //This function makes a track forget its history :)
+ //------------------------------------------------------------------
+ if (factor<=0) {
+ ResetCovariance(10.);
+ return;
+ }
+ ResetCovariance(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=GetX(), x2=x1+(xk-x1), dx=x2-x1;
+
+ if (TMath::Abs(GetSnp()+GetC()*dx) >= AliTPCReconstructor::GetMaxSnpTrack()) {
+ return 0;
+ }
+
+ // Double_t y1=fP0, z1=fP1;
+ Double_t c1=GetSnp(), r1=sqrt((1.-c1)*(1.+c1));
+ Double_t c2=c1 + GetC()*dx, r2=sqrt((1.-c2)*(1.+c2));
+
+ y = GetY();
+ z = GetZ();
+ //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 = GetC()*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;
+ dz = GetTgl()*TMath::ASin(delta)/GetC();
+ //
+ y+=dy;
+ z+=dz;
+
+
+ return 1;
+}
+
+
+//_____________________________________________________________________________
+Double_t AliTPCseed::GetPredictedChi2(const AliCluster *c) const
+{
+ //-----------------------------------------------------------------
+ // This function calculates a predicted chi2 increment.
+ //-----------------------------------------------------------------
+ Double_t p[2]={c->GetY(), c->GetZ()};
+ Double_t cov[3]={fErrorY2, 0., fErrorZ2};
+
+ Float_t dx = ((AliTPCclusterMI*)c)->GetX()-GetX();
+ if (TMath::Abs(dx)>0){
+ Float_t ty = TMath::Tan(TMath::ASin(GetSnp()));
+ Float_t dy = dx*ty;
+ Float_t dz = dx*TMath::Sqrt(1.+ty*ty)*GetTgl();
+ p[0] = c->GetY()-dy;
+ p[1] = c->GetZ()-dz;
+ }
+ return AliExternalTrackParam::GetPredictedChi2(p,cov);
+}
+
+//_________________________________________________________________________________________
+
+
+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->GetSigma1Pt2())/(t->OneOverPt()+0.0066);
+ if (t->fBConstrain) f2=1.2;
+
+ Float_t f1 =1;
+ f1 = 1-20*TMath::Sqrt(GetSigma1Pt2())/(OneOverPt()+0.0066);
+
+ if (fBConstrain) f1=1.2;
+
+ if (t->GetNumberOfClusters()*f2 <GetNumberOfClusters()*f1) return -1;
+ else return +1;
+ }
+}
+
+
+
+
+//_____________________________________________________________________________
+Bool_t AliTPCseed::Update(const AliCluster *c, Double_t chisq, Int_t index)
+{
+ //-----------------------------------------------------------------
+ // This function associates a cluster with this track.
+ //-----------------------------------------------------------------
+ Int_t n=GetNumberOfClusters();
+ Int_t idx=GetClusterIndex(n); // save the current cluster index
+
+ AliTPCclusterMI cl(*(AliTPCclusterMI*)c); cl.SetSigmaY2(fErrorY2); cl.SetSigmaZ2(fErrorZ2);
+
+ AliTPCClusterParam * parcl = AliTPCcalibDB::Instance()->GetClusterParam();
+
+ Float_t ty = TMath::Tan(TMath::ASin(GetSnp()));
+
+ if( parcl ){
+ Int_t padSize = 0; // short pads
+ if (cl.GetDetector() >= 36) {
+ padSize = 1; // medium pads
+ if (cl.GetRow() > 63) padSize = 2; // long pads
+ }
+ Float_t waveCorr = parcl->GetWaveCorrection( padSize, cl.GetZ(), cl.GetMax(),cl.GetPad(), ty );
+ cl.SetY( cl.GetY() - waveCorr );
+ }
+
+ Float_t dx = ((AliTPCclusterMI*)c)->GetX()-GetX();
+ if (TMath::Abs(dx)>0){
+ Float_t dy = dx*ty;
+ Float_t dz = dx*TMath::Sqrt(1.+ty*ty)*GetTgl();
+ cl.SetY(cl.GetY()-dy);
+ cl.SetZ(cl.GetZ()-dz);
+ }
+
+
+ if (!AliTPCtrack::Update(&cl,chisq,index)) return kFALSE;
+
+ if (fCMeanSigmaY2p30<0){
+ fCMeanSigmaY2p30= c->GetSigmaY2(); //! current mean sigma Y2 - mean30%
+ fCMeanSigmaZ2p30= c->GetSigmaZ2(); //! current mean sigma Z2 - mean30%
+ fCMeanSigmaY2p30R = 1; //! current mean sigma Y2 - mean5%
+ fCMeanSigmaZ2p30R = 1; //! current mean sigma Z2 - mean5%
+ }
+ //
+ fCMeanSigmaY2p30= 0.70*fCMeanSigmaY2p30 +0.30*c->GetSigmaY2();
+ fCMeanSigmaZ2p30= 0.70*fCMeanSigmaZ2p30 +0.30*c->GetSigmaZ2();
+ if (fCurrentSigmaY2>0){
+ fCMeanSigmaY2p30R = 0.7*fCMeanSigmaY2p30R +0.3*c->GetSigmaY2()/fCurrentSigmaY2;
+ fCMeanSigmaZ2p30R = 0.7*fCMeanSigmaZ2p30R +0.3*c->GetSigmaZ2()/fCurrentSigmaZ2;
+ }
+
+
+ SetClusterIndex(n,idx); // restore the current cluster index
+ return kTRUE;
+}
+
+
+
+//_____________________________________________________________________________
+Float_t 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.
+ //-----------------------------------------------------------------
+ // CookdEdxAnalytical(Double_t low, Double_t up, Int_t type, Int_t i1, Int_t i2, Int_t returnVal)
+ AliTPCParam *param = AliTPCcalibDB::Instance()->GetParameters();
+
+ Int_t row0 = param->GetNRowLow();
+ Int_t row1 = row0+param->GetNRowUp1();
+ Int_t row2 = row1+param->GetNRowUp2();
+ const AliTPCRecoParam * recoParam = AliTPCcalibDB::Instance()->GetTransform()->GetCurrentRecoParam();
+ Int_t useTot = 0;
+ if (recoParam) useTot = (recoParam->GetUseTotCharge())? 0:1;
+ //
+ //
+ //
+ fDEDX[0] = CookdEdxAnalytical(low,up,useTot ,i1 ,i2, 0);
+ fDEDX[1] = CookdEdxAnalytical(low,up,useTot ,0 ,row0, 0);
+ fDEDX[2] = CookdEdxAnalytical(low,up,useTot ,row0,row1, 0);
+ fDEDX[3] = CookdEdxAnalytical(low,up,useTot ,row1,row2, 0);
+ fDEDX[4] = CookdEdxAnalytical(low,up,useTot ,row0,row2, 0); // full OROC truncated mean
+ //
+ fSDEDX[0] = CookdEdxAnalytical(low,up,useTot ,i1 ,i2, 1);
+ fSDEDX[1] = CookdEdxAnalytical(low,up,useTot ,0 ,row0, 1);
+ fSDEDX[2] = CookdEdxAnalytical(low,up,useTot ,row0,row1, 1);
+ fSDEDX[3] = CookdEdxAnalytical(low,up,useTot ,row1,row2, 1);
+ //
+ fNCDEDX[0] = TMath::Nint(GetTPCClustInfo(2, 1, i1 , i2));
+ fNCDEDX[1] = TMath::Nint(GetTPCClustInfo(2, 1, 0 , row0));
+ fNCDEDX[2] = TMath::Nint(GetTPCClustInfo(2, 1, row0, row1));
+ fNCDEDX[3] = TMath::Nint(GetTPCClustInfo(2, 1, row1, row2));
+ //
+ fNCDEDXInclThres[0] = TMath::Nint(GetTPCClustInfo(2, 2, i1 , i2));
+ fNCDEDXInclThres[1] = TMath::Nint(GetTPCClustInfo(2, 2, 0 , row0));
+ fNCDEDXInclThres[2] = TMath::Nint(GetTPCClustInfo(2, 2, row0, row1));
+ fNCDEDXInclThres[3] = TMath::Nint(GetTPCClustInfo(2, 2, row1, row2));
+ //
+ SetdEdx(fDEDX[0]);
+ return fDEDX[0];
+
+// return CookdEdxNorm(low,up,0,i1,i2,1,0,2);
+
+
+// Float_t amp[200];
+// Float_t angular[200];
+// Float_t weight[200];
+// Int_t index[200];
+// //Int_t nc = 0;
+// 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;
+
+// Float_t gainGG = 1;
+// if (AliTPCcalibDB::Instance()->GetParameters()){
+// gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000.; //relative gas gain
+// }
+
+
+// for (Int_t of =0; of<4; of++){
+// for (Int_t i=of+i1;i<i2;i+=4)
+// {
+// Int_t clindex = fIndex[i];
+// if (clindex<0||clindex&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 = (AliTPCReconstructor::GetCtgRange()-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;
+// amp[nc[of]] /=gainGG;
+// 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 0;
+// }
+// // 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);
+// return dedx;
+}
+
+void AliTPCseed::CookPID()
+{
+ //
+ // cook PID information according dEdx
+ //
+ Double_t fRange = 10.;
+ Double_t fRes = 0.1;
+ Double_t fMIP = 47.;
+ //
+ Int_t ns=AliPID::kSPECIES;
+ Double_t sumr =0;
+ for (Int_t j=0; j<ns; j++) {
+ Double_t mass=AliPID::ParticleMass(j);
+ Double_t mom=GetP();
+ Double_t dedx=fdEdx/fMIP;
+ Double_t bethe=AliMathBase::BetheBlochAleph(mom/mass);
+ Double_t sigma=fRes*bethe;
+ if (sigma>0.001){
+ if (TMath::Abs(dedx-bethe) > fRange*sigma) {
+ fTPCr[j]=TMath::Exp(-0.5*fRange*fRange)/sigma;
+ sumr+=fTPCr[j];
+ continue;
+ }
+ fTPCr[j]=TMath::Exp(-0.5*(dedx-bethe)*(dedx-bethe)/(sigma*sigma))/sigma;
+ sumr+=fTPCr[j];
+ }
+ else{
+ fTPCr[j]=1.;
+ sumr+=fTPCr[j];
+ }
+ }
+ for (Int_t j=0; j<ns; j++) {
+ fTPCr[j]/=sumr; //normalize
+ }
+}
+
+Double_t AliTPCseed::GetYat(Double_t xk) const {
+//-----------------------------------------------------------------
+// This function calculates the Y-coordinate of a track at the plane x=xk.
+//-----------------------------------------------------------------
+ if (TMath::Abs(GetSnp())>AliTPCReconstructor::GetMaxSnpTrack()) return 0.; //patch 01 jan 06
+ Double_t c1=GetSnp(), r1=TMath::Sqrt((1.-c1)*(1.+c1));
+ Double_t c2=c1+GetC()*(xk-GetX());
+ if (TMath::Abs(c2)>AliTPCReconstructor::GetMaxSnpTrack()) return 0;
+ Double_t r2=TMath::Sqrt((1.-c2)*(1.+c2));
+ return GetY() + (xk-GetX())*(c1+c2)/(r1+r2);
+}
+
+
+
+Float_t AliTPCseed::CookdEdxNorm(Double_t low, Double_t up, Int_t type, Int_t i1, Int_t i2, Bool_t shapeNorm,Int_t posNorm, Int_t padNorm, Int_t returnVal){
+
+ //
+ // calculates dedx using the cluster
+ // low - up specify trunc mean range - default form 0-0.7
+ // type - 1 - max charge or 0- total charge in cluster
+ // //2- max no corr 3- total+ correction
+ // i1-i2 - the pad-row range used for calculation
+ // shapeNorm - kTRUE -taken from OCDB
+ //
+ // posNorm - usage of pos normalization
+ // padNorm - pad type normalization
+ // returnVal - 0 return mean
+ // - 1 return RMS
+ // - 2 return number of clusters
+ //
+ // normalization parametrization taken from AliTPCClusterParam
+ //
+ AliTPCClusterParam * parcl = AliTPCcalibDB::Instance()->GetClusterParam();
+ AliTPCParam * param = AliTPCcalibDB::Instance()->GetParameters();
+ if (!parcl) return 0;
+ if (!param) return 0;
+ Int_t row0 = param->GetNRowLow();
+ Int_t row1 = row0+param->GetNRowUp1();
+
+ Float_t amp[160];
+ Int_t indexes[160];
+ Int_t ncl=0;
+ //
+ //
+ Float_t gainGG = 1; // gas gain factor -always enabled
+ Float_t gainPad = 1; // gain map - used always
+ Float_t corrShape = 1; // correction due angular effect, diffusion and electron attachment
+ Float_t corrPos = 1; // local position correction - if posNorm enabled
+ Float_t corrPadType = 1; // pad type correction - if padNorm enabled
+ Float_t corrNorm = 1; // normalization factor - set Q to channel 50
+ //
+ //
+ //
+ if (AliTPCcalibDB::Instance()->GetParameters()){
+ gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000; //relative gas gain
+ }
+
+ const Float_t ktany = TMath::Tan(TMath::DegToRad()*10);
+ const Float_t kedgey =3.;
+ //
+ //
+ for (Int_t irow=i1; irow<i2; irow++){
+ AliTPCclusterMI* cluster = GetClusterPointer(irow);
+ if (!cluster) continue;
+ if (TMath::Abs(cluster->GetY())>cluster->GetX()*ktany-kedgey) continue; // edge cluster
+ Float_t charge= (type%2)? cluster->GetMax():cluster->GetQ();
+ Int_t ipad= 0;
+ if (irow>=row0) ipad=1;
+ if (irow>=row1) ipad=2;
+ //
+ //
+ //
+ AliTPCCalPad * gainMap = AliTPCcalibDB::Instance()->GetDedxGainFactor();
+ if (gainMap) {
+ //
+ // Get gainPad - pad by pad calibration
+ //
+ Float_t factor = 1;
+ AliTPCCalROC * roc = gainMap->GetCalROC(cluster->GetDetector());
+ if (irow < row0) { // IROC
+ factor = roc->GetValue(irow, TMath::Nint(cluster->GetPad()));
+ } else { // OROC
+ factor = roc->GetValue(irow - row0, TMath::Nint(cluster->GetPad()));
+ }
+ if (factor>0.5) gainPad=factor;
+ }
+ //
+ //do position and angular normalization
+ //
+ if (shapeNorm){
+ if (type<=1){
+ //
+ AliTPCTrackerPoint * point = GetTrackPoint(irow);
+ Float_t ty = TMath::Abs(point->GetAngleY());
+ Float_t tz = TMath::Abs(point->GetAngleZ()*TMath::Sqrt(1+ty*ty));
+
+ Float_t dr = (250.-TMath::Abs(cluster->GetZ()))/250.;
+ corrShape = parcl->Qnorm(ipad,type,dr,ty,tz);
+ }
+ }
+
+ if (posNorm>0){
+ //
+ // Do position normalization - relative distance to
+ // center of pad- time bin
+ // Work in progress
+ // corrPos = parcl->QnormPos(ipad,type, cluster->GetPad(),
+ // cluster->GetTimeBin(), cluster->GetZ(),
+ // cluster->GetSigmaY2(),cluster->GetSigmaZ2(),
+ // cluster->GetMax(),cluster->GetQ());
+ // scaled response function
+ Float_t yres0 = parcl->GetRMS0(0,ipad,0,0)/param->GetPadPitchWidth(cluster->GetDetector());
+ Float_t zres0 = parcl->GetRMS0(1,ipad,0,0)/param->GetZWidth();
+ //
+
+ AliTPCTrackerPoint * point = GetTrackPoint(irow);
+ Float_t ty = TMath::Abs(point->GetAngleY());
+ Float_t tz = TMath::Abs(point->GetAngleZ()*TMath::Sqrt(1+ty*ty));
+
+ if (type==1) corrPos =
+ parcl->QmaxCorrection(cluster->GetDetector(), cluster->GetRow(),cluster->GetPad(),
+ cluster->GetTimeBin(),ty,tz,yres0,zres0,0.4);
+ if (type==0) corrPos =
+ parcl->QtotCorrection(cluster->GetDetector(), cluster->GetRow(),cluster->GetPad(),
+ cluster->GetTimeBin(),ty,tz,yres0,zres0,cluster->GetQ(),2.5,0.4);
+ if (posNorm==3){
+ Float_t dr = (250.-TMath::Abs(cluster->GetZ()))/250.;
+ Double_t signtgl = (cluster->GetZ()*point->GetAngleZ()>0)? 1:-1;
+ Double_t p2 = TMath::Abs(TMath::Sin(TMath::ATan(ty)));
+ Float_t corrHis = parcl->QnormHis(ipad,type,dr,p2,TMath::Abs(point->GetAngleZ())*signtgl);
+ if (corrHis>0) corrPos*=corrHis;
+ }
+
+ }
+
+ if (padNorm==1){
+ //taken from OCDB
+ if (type==0 && parcl->QpadTnorm()) corrPadType = (*parcl->QpadTnorm())[ipad];
+ if (type==1 && parcl->QpadMnorm()) corrPadType = (*parcl->QpadMnorm())[ipad];
+
+ }
+ if (padNorm==2){
+ corrPadType =param->GetPadPitchLength(cluster->GetDetector(),cluster->GetRow());
+ //use hardwired - temp fix
+ if (type==0) corrNorm=3.;
+ if (type==1) corrNorm=1.;
+ }
+ //
+ amp[ncl]=charge;
+ amp[ncl]/=gainGG;
+ amp[ncl]/=gainPad;
+ amp[ncl]/=corrShape;
+ amp[ncl]/=corrPadType;
+ amp[ncl]/=corrPos;
+ amp[ncl]/=corrNorm;
+ //
+ ncl++;
+ }
+
+ if (type>3) return ncl;
+ TMath::Sort(ncl,amp, indexes, kFALSE);
+
+ if (ncl<10) return 0;
+
+ Float_t suma=0;
+ Float_t suma2=0;
+ Float_t sumn=0;
+ Int_t icl0=TMath::Nint(ncl*low);
+ Int_t icl1=TMath::Nint(ncl*up);
+ for (Int_t icl=icl0; icl<icl1;icl++){
+ suma+=amp[indexes[icl]];
+ suma2+=amp[indexes[icl]]*amp[indexes[icl]];
+ sumn++;
+ }
+ Float_t mean =suma/sumn;
+ Float_t rms =TMath::Sqrt(TMath::Abs(suma2/sumn-mean*mean));
+ //
+ // do time-dependent correction for pressure and temperature variations
+ UInt_t runNumber = 1;
+ Float_t corrTimeGain = 1;
+ AliTPCTransform * trans = AliTPCcalibDB::Instance()->GetTransform();
+ const AliTPCRecoParam * recoParam = AliTPCcalibDB::Instance()->GetTransform()->GetCurrentRecoParam();
+ if (trans && recoParam->GetUseGainCorrectionTime()>0) {
+ runNumber = trans->GetCurrentRunNumber();
+ //AliTPCcalibDB::Instance()->SetRun(runNumber);
+ TObjArray * timeGainSplines = AliTPCcalibDB::Instance()->GetTimeGainSplinesRun(runNumber);
+ if (timeGainSplines) {
+ UInt_t time = trans->GetCurrentTimeStamp();
+ AliSplineFit * fitMIP = (AliSplineFit *) timeGainSplines->At(0);
+ AliSplineFit * fitFPcosmic = (AliSplineFit *) timeGainSplines->At(1);
+ if (fitMIP) {
+ corrTimeGain = AliTPCcalibDButil::EvalGraphConst(fitMIP, time);/*fitMIP->Eval(time);*/
+ } else {
+ if (fitFPcosmic) corrTimeGain = AliTPCcalibDButil::EvalGraphConst(fitFPcosmic, time);/*fitFPcosmic->Eval(time);*/
+ }
+ }
+ }
+ mean /= corrTimeGain;
+ rms /= corrTimeGain;
+ //
+ if (returnVal==1) return rms;
+ if (returnVal==2) return ncl;
+ return mean;
+}
+
+Float_t AliTPCseed::CookdEdxAnalytical(Double_t low, Double_t up, Int_t type, Int_t i1, Int_t i2, Int_t returnVal, Int_t rowThres, Int_t mode){
+
+ //
+ // calculates dedx using the cluster
+ // low - up specify trunc mean range - default form 0-0.7
+ // type - 1 - max charge or 0- total charge in cluster
+ // //2- max no corr 3- total+ correction
+ // i1-i2 - the pad-row range used for calculation
+ //
+ // posNorm - usage of pos normalization
+ // returnVal - 0 return mean
+ // - 1 return RMS
+ // - 2 return number of clusters
+ // - 3 ratio
+ // - 4 mean upper half
+ // - 5 mean - lower half
+ // - 6 third moment
+ // mode - 0 - linear
+ // - 1 - logatithmic
+ // rowThres - number of rows before and after given pad row to check for clusters below threshold
+ //
+ // normalization parametrization taken from AliTPCClusterParam
+ //
+ AliTPCClusterParam * parcl = AliTPCcalibDB::Instance()->GetClusterParam();
+ AliTPCParam * param = AliTPCcalibDB::Instance()->GetParameters();
+ if (!parcl) return 0;
+ if (!param) return 0;
+ Int_t row0 = param->GetNRowLow();
+ Int_t row1 = row0+param->GetNRowUp1();
+
+ Float_t amp[160];
+ Int_t indexes[160];
+ Int_t ncl=0;
+ Int_t nclBelowThr = 0; // counts number of clusters below threshold
+ //
+ //
+ Float_t gainGG = 1; // gas gain factor -always enabled
+ Float_t gainPad = 1; // gain map - used always
+ Float_t corrPos = 1; // local position correction - if posNorm enabled
+ //
+ //
+ //
+ if (AliTPCcalibDB::Instance()->GetParameters()){
+ gainGG= AliTPCcalibDB::Instance()->GetParameters()->GetGasGain()/20000; //relative gas gain
+ }
+ //
+ // extract time-dependent correction for pressure and temperature variations
+ //
+ UInt_t runNumber = 1;
+ Float_t corrTimeGain = 1;
+ TObjArray * timeGainSplines = 0x0;
+ TGraphErrors * grPadEqual = 0x0;
+ TGraphErrors* grChamberGain[3]={0x0,0x0,0x0};
+ //
+ AliTPCTransform * trans = AliTPCcalibDB::Instance()->GetTransform();
+ const AliTPCRecoParam * recoParam = AliTPCcalibDB::Instance()->GetTransform()->GetCurrentRecoParam();
+ //
+ if (recoParam->GetNeighborRowsDedx() == 0) rowThres = 0;
+ //
+ if (trans) {
+ runNumber = trans->GetCurrentRunNumber();
+ //AliTPCcalibDB::Instance()->SetRun(runNumber);
+ timeGainSplines = AliTPCcalibDB::Instance()->GetTimeGainSplinesRun(runNumber);
+ if (timeGainSplines && recoParam->GetUseGainCorrectionTime()>0) {
+ UInt_t time = trans->GetCurrentTimeStamp();
+ AliSplineFit * fitMIP = (AliSplineFit *) timeGainSplines->At(0);
+ AliSplineFit * fitFPcosmic = (AliSplineFit *) timeGainSplines->At(1);
+ if (fitMIP) {
+ corrTimeGain = AliTPCcalibDButil::EvalGraphConst(fitMIP, time); /*fitMIP->Eval(time);*/
+ } else {
+ if (fitFPcosmic) corrTimeGain = AliTPCcalibDButil::EvalGraphConst(fitFPcosmic, time); /*fitFPcosmic->Eval(time); */
+ }
+ //
+ if (type==1) grPadEqual = (TGraphErrors * ) timeGainSplines->FindObject("TGRAPHERRORS_MEANQMAX_PADREGIONGAIN_BEAM_ALL");
+ if (type==0) grPadEqual = (TGraphErrors * ) timeGainSplines->FindObject("TGRAPHERRORS_MEANQTOT_PADREGIONGAIN_BEAM_ALL");
+ const char* names[3]={"SHORT","MEDIUM","LONG"};
+ for (Int_t iPadRegion=0; iPadRegion<3; ++iPadRegion)
+ grChamberGain[iPadRegion]=(TGraphErrors*)timeGainSplines->FindObject(Form("TGRAPHERRORS_MEAN_CHAMBERGAIN_%s_BEAM_ALL",names[iPadRegion]));
+ }
+ }
+
+ const Float_t kClusterShapeCut = 1.5; // IMPPRTANT TO DO: move value to AliTPCRecoParam
+ const Float_t ktany = TMath::Tan(TMath::DegToRad()*10);
+ const Float_t kedgey =3.;
+ //
+ //
+ for (Int_t irow=i1; irow<i2; irow++){
+ AliTPCclusterMI* cluster = GetClusterPointer(irow);
+ if (!cluster && irow > 1 && irow < 157) {
+ Bool_t isClBefore = kFALSE;
+ Bool_t isClAfter = kFALSE;
+ for(Int_t ithres = 1; ithres <= rowThres; ithres++) {
+ AliTPCclusterMI * clusterBefore = GetClusterPointer(irow - ithres);
+ if (clusterBefore) isClBefore = kTRUE;
+ AliTPCclusterMI * clusterAfter = GetClusterPointer(irow + ithres);
+ if (clusterAfter) isClAfter = kTRUE;
+ }
+ if (isClBefore && isClAfter) nclBelowThr++;
+ }
+ if (!cluster) continue;
+ //
+ //
+ if (TMath::Abs(cluster->GetY())>cluster->GetX()*ktany-kedgey) continue; // edge cluster
+ //
+ AliTPCTrackerPoint * point = GetTrackPoint(irow);
+ if (point==0) continue;
+ Float_t rsigmay = TMath::Sqrt(point->GetSigmaY());
+ if (rsigmay > kClusterShapeCut) continue;
+ //
+ if (cluster->IsUsed(11)) continue; // remove shared clusters for PbPb
+ //
+ Float_t charge= (type%2)? cluster->GetMax():cluster->GetQ();
+ Int_t ipad= 0;
+ if (irow>=row0) ipad=1;
+ if (irow>=row1) ipad=2;
+ //
+ //
+ //
+ AliTPCCalPad * gainMap = AliTPCcalibDB::Instance()->GetDedxGainFactor();
+ if (gainMap) {
+ //
+ // Get gainPad - pad by pad calibration
+ //
+ Float_t factor = 1;
+ AliTPCCalROC * roc = gainMap->GetCalROC(cluster->GetDetector());
+ if (irow < row0) { // IROC
+ factor = roc->GetValue(irow, TMath::Nint(cluster->GetPad()));
+ } else { // OROC
+ factor = roc->GetValue(irow - row0, TMath::Nint(cluster->GetPad()));
+ }
+ if (factor>0.3) gainPad=factor;
+ }
+ //
+ // Do position normalization - relative distance to
+ // center of pad- time bin
+
+ Float_t ty = TMath::Abs(point->GetAngleY());
+ Float_t tz = TMath::Abs(point->GetAngleZ()*TMath::Sqrt(1+ty*ty));
+ Float_t yres0 = parcl->GetRMS0(0,ipad,0,0)/param->GetPadPitchWidth(cluster->GetDetector());
+ Float_t zres0 = parcl->GetRMS0(1,ipad,0,0)/param->GetZWidth();
+
+ yres0 *=parcl->GetQnormCorr(ipad, type,0);
+ zres0 *=parcl->GetQnormCorr(ipad, type,1);
+ Float_t effLength=parcl->GetQnormCorr(ipad, type,4)*0.5;
+ Float_t effDiff =(parcl->GetQnormCorr(ipad, type,2)+parcl->GetQnormCorr(ipad, type,3))*0.5;
+ //
+ if (type==1) {
+ corrPos = parcl->GetQnormCorr(ipad, type,5)*
+ parcl->QmaxCorrection(cluster->GetDetector(), cluster->GetRow(),cluster->GetPad(),
+ cluster->GetTimeBin(),ty,tz,yres0,zres0,effLength,effDiff);
+ Float_t drm = 0.5-TMath::Abs(cluster->GetZ()/250.);
+ corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,0)*drm);
+ corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,1)*ty*ty);
+ corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,2)*tz*tz);
+ //
+ }
+ if (type==0) {
+ corrPos = parcl->GetQnormCorr(ipad, type,5)*
+ parcl->QtotCorrection(cluster->GetDetector(), cluster->GetRow(),cluster->GetPad(),
+ cluster->GetTimeBin(),ty,tz,yres0,zres0,cluster->GetQ(),2.5,effLength,effDiff);
+
+ Float_t drm = 0.5-TMath::Abs(cluster->GetZ()/250.);
+ corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,0)*drm);
+ corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,1)*ty*ty);
+ corrPos*=(1+parcl->GetQnormCorr(ipad, type+2,2)*tz*tz);
+ //
+ }
+ //
+ // pad region equalization outside of cluster param
+ //
+ Float_t gainEqualPadRegion = 1;
+ if (grPadEqual && recoParam->GetUseGainCorrectionTime()>0) gainEqualPadRegion = grPadEqual->Eval(ipad);
+ //
+ // chamber-by-chamber equalization outside gain map
+ //
+ Float_t gainChamber = 1;
+ if (grChamberGain[ipad] && recoParam->GetUseGainCorrectionTime()>0) gainChamber = grChamberGain[ipad]->Eval(cluster->GetDetector());
+ //
+ amp[ncl]=charge;
+ amp[ncl]/=gainGG;
+ amp[ncl]/=gainPad;
+ amp[ncl]/=corrPos;
+ amp[ncl]/=gainEqualPadRegion;
+ amp[ncl]/=gainChamber;
+ //
+ ncl++;
+ }
+
+ if (type==2) return ncl;
+ TMath::Sort(ncl,amp, indexes, kFALSE);
+ //
+ if (ncl<10) return 0;
+ //
+ Double_t * ampWithBelow = new Double_t[ncl + nclBelowThr];
+ for(Int_t iCl = 0; iCl < ncl + nclBelowThr; iCl++) {
+ if (iCl < nclBelowThr) {
+ ampWithBelow[iCl] = amp[indexes[0]];
+ } else {
+ ampWithBelow[iCl] = amp[indexes[iCl - nclBelowThr]];
+ }
+ }
+ //printf("DEBUG: %i shit %f", nclBelowThr, amp[indexes[0]]);
+ //
+ Float_t suma=0;
+ Float_t suma2=0;
+ Float_t suma3=0;
+ Float_t sumaS=0;
+ Float_t sumn=0;
+ // upper,and lower part statistic
+ Float_t sumL=0, sumL2=0, sumLN=0;
+ Float_t sumD=0, sumD2=0, sumDN=0;
+
+ Int_t icl0=TMath::Nint((ncl + nclBelowThr)*low);
+ Int_t icl1=TMath::Nint((ncl + nclBelowThr)*up);
+ Int_t iclm=TMath::Nint((ncl + nclBelowThr)*(low +(up+low)*0.5));
+ //
+ for (Int_t icl=icl0; icl<icl1;icl++){
+ if (ampWithBelow[icl]<0.1) continue;
+ Double_t camp=ampWithBelow[icl]/corrTimeGain;
+ if (mode==1) camp= TMath::Log(camp);
+ if (icl<icl1){
+ suma+=camp;
+ suma2+=camp*camp;
+ suma3+=camp*camp*camp;
+ sumaS+=TMath::Power(TMath::Abs(camp),1./3.);
+ sumn++;
+ }
+ if (icl>iclm){
+ sumL+=camp;
+ sumL2+=camp*camp;
+ sumLN++;
+ }
+ if (icl<=iclm){
+ sumD+=camp;
+ sumD2+=camp*camp;
+ sumDN++;
+ }
+ }
+ //
+ Float_t mean = 0;
+ Float_t meanL = 0;
+ Float_t meanD = 0; // lower half mean
+ if (sumn > 1e-30) mean =suma/sumn;
+ if (sumLN > 1e-30) meanL =sumL/sumLN;
+ if (sumDN > 1e-30) meanD =(sumD/sumDN);
+ /*
+ Float_t mean =suma/sumn;
+ Float_t meanL = sumL/sumLN;
+ Float_t meanD =(sumD/sumDN); // lower half mean
+ */
+
+ Float_t rms = 0;
+ Float_t mean2=0;
+ Float_t mean3=0;
+ Float_t meanS=0;
+
+ if(sumn>0){
+ rms = TMath::Sqrt(TMath::Abs(suma2/sumn-mean*mean));
+ mean2=suma2/sumn;
+ mean3=suma3/sumn;
+ meanS=sumaS/sumn;
+ }
+
+ if (mean2>0) mean2=TMath::Power(TMath::Abs(mean2),1./2.);
+ if (mean3>0) mean3=TMath::Power(TMath::Abs(mean3),1./3.);
+ if (meanS>0) meanS=TMath::Power(TMath::Abs(meanS),3.);
+ //
+ if (mode==1) mean=TMath::Exp(mean);
+ if (mode==1) meanL=TMath::Exp(meanL); // upper truncation
+ if (mode==1) meanD=TMath::Exp(meanD); // lower truncation
+ //
+ delete [] ampWithBelow;
+
+
+ //
+ if (returnVal==1) return rms;
+ if (returnVal==2) return ncl;
+ if (returnVal==3) return Double_t(nclBelowThr)/Double_t(nclBelowThr+ncl);
+ if (returnVal==4) return meanL;
+ if (returnVal==5) return meanD;
+ if (returnVal==6) return mean2;
+ if (returnVal==7) return mean3;
+ if (returnVal==8) return meanS;
+ return mean;
+}
+
+
+
+
+Float_t AliTPCseed::CookShape(Int_t type){
+ //
+ //
+ //
+ //-----------------------------------------------------------------
+ // This funtion calculates dE/dX within the "low" and "up" cuts.
+ //-----------------------------------------------------------------
+ Float_t means=0;
+ Float_t meanc=0;
+ for (Int_t i =0; i<160;i++) {
+ AliTPCTrackerPoint * point = GetTrackPoint(i);
+ if (point==0) continue;
+
+ AliTPCclusterMI * cl = fClusterPointer[i];
+ if (cl==0) continue;
+
+ Float_t rsigmay = TMath::Sqrt(point->GetSigmaY());
+ Float_t rsigmaz = TMath::Sqrt(point->GetSigmaZ());
+ Float_t rsigma = (rsigmay+rsigmaz)*0.5;
+ if (type==0) means+=rsigma;
+ if (type==1) means+=rsigmay;
+ if (type==2) means+=rsigmaz;
+ meanc++;
+ }
+ Float_t mean = (meanc>0)? means/meanc:0;
+ return mean;
+}
+
+
+
+Int_t AliTPCseed::RefitTrack(AliTPCseed *seed, AliExternalTrackParam * parin, AliExternalTrackParam * parout){
+ //
+ // Refit the track
+ // return value - number of used clusters
+ //
+ //
+ const Int_t kMinNcl =10;
+ AliTPCseed *track=new AliTPCseed(*seed);
+ Int_t sector=-1;
+ // reset covariance
+ //
+ Double_t covar[15];
+ for (Int_t i=0;i<15;i++) covar[i]=0;
+ covar[0]=10.*10.;
+ covar[2]=10.*10.;
+ covar[5]=10.*10./(64.*64.);
+ covar[9]=10.*10./(64.*64.);
+ covar[14]=1*1;
+ //
+
+ Float_t xmin=1000, xmax=-10000;
+ Int_t imin=158, imax=0;
+ for (Int_t i=0;i<160;i++) {
+ AliTPCclusterMI *c=track->GetClusterPointer(i);
+ if (!c || (track->GetClusterIndex(i) & 0x8000)) continue;
+ if (sector<0) sector = c->GetDetector();
+ if (c->GetX()<xmin) xmin=c->GetX();
+ if (c->GetX()>xmax) xmax=c->GetX();
+ if (i<imin) imin=i;
+ if (i>imax) imax=i;
+ }
+ if(imax-imin<kMinNcl) {
+ delete track;
+ return 0 ;
+ }
+ // Not succes to rotate
+ if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
+ delete track;
+ return 0;
+ }
+ //
+ //
+ // fit from inner to outer row
+ //
+ AliExternalTrackParam paramIn;
+ AliExternalTrackParam paramOut;
+ Bool_t isOK=kTRUE;
+ Int_t ncl=0;
+ //
+ //
+ //
+ for (Int_t i=imin; i<=imax; i++){
+ AliTPCclusterMI *c=track->GetClusterPointer(i);
+ if (!c || (track->GetClusterIndex(i) & 0x8000)) continue;
+ // if (RejectCluster(c,track)) continue;
+ sector = (c->GetDetector()%18);
+ if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
+ //continue;
+ }
+ Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
+ Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
+ if (!track->PropagateTo(r[0])) {
+ isOK=kFALSE;
+ }
+ if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
+ }
+ if (!isOK) { delete track; return 0;}
+ track->AddCovariance(covar);
+ //
+ //
+ //
+ for (Int_t i=imax; i>=imin; i--){
+ AliTPCclusterMI *c=track->GetClusterPointer(i);
+ if (!c || (track->GetClusterIndex(i) & 0x8000)) continue;
+ //if (RejectCluster(c,track)) continue;
+ sector = (c->GetDetector()%18);
+ if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
+ //continue;
+ }
+ Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
+ Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
+ if (!track->PropagateTo(r[0])) {
+ isOK=kFALSE;
+ }
+ if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
+ }
+ //if (!isOK) { delete track; return 0;}
+ paramIn = *track;
+ track->AddCovariance(covar);
+ //
+ //
+ for (Int_t i=imin; i<=imax; i++){
+ AliTPCclusterMI *c=track->GetClusterPointer(i);
+ if (!c || (track->GetClusterIndex(i) & 0x8000)) continue;
+ sector = (c->GetDetector()%18);
+ if (!track->Rotate(TMath::DegToRad()*(sector%18*20.+10.)-track->GetAlpha())) {
+ //continue;
+ }
+ ncl++;
+ //if (RejectCluster(c,track)) continue;
+ Double_t r[3]={c->GetX(),c->GetY(),c->GetZ()};
+ Double_t cov[3]={0.01,0.,0.01}; //TODO: correct error parametrisation
+ if (!track->PropagateTo(r[0])) {
+ isOK=kFALSE;
+ }
+ if ( !((static_cast<AliExternalTrackParam*>(track)->Update(&r[1],cov)))) isOK=kFALSE;
+ }
+ //if (!isOK) { delete track; return 0;}
+ paramOut=*track;
+ //
+ //
+ //
+ if (parin) (*parin)=paramIn;
+ if (parout) (*parout)=paramOut;
+ delete track;
+ return ncl;
+}
+
+
+
+Bool_t AliTPCseed::RefitTrack(AliTPCseed* /*seed*/, Bool_t /*out*/){
+ //
+ //
+ //
+ return kFALSE;
+}
+
+
+
+
+
+
+void AliTPCseed::GetError(AliTPCclusterMI* cluster, AliExternalTrackParam * param,
+ Double_t& erry, Double_t &errz)
+{
+ //
+ // Get cluster error at given position
+ //
+ AliTPCClusterParam *clusterParam = AliTPCcalibDB::Instance()->GetClusterParam();
+ Double_t tany,tanz;
+ Double_t snp1=param->GetSnp();
+ tany=snp1/TMath::Sqrt((1.-snp1)*(1.+snp1));
+ //
+ Double_t tgl1=param->GetTgl();
+ tanz=tgl1/TMath::Sqrt((1.-snp1)*(1.+snp1));
+ //
+ Int_t padSize = 0; // short pads
+ if (cluster->GetDetector() >= 36) {
+ padSize = 1; // medium pads
+ if (cluster->GetRow() > 63) padSize = 2; // long pads
+ }
+
+ erry = clusterParam->GetError0Par( 0, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tany) );
+ errz = clusterParam->GetError0Par( 1, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tanz) );
+}
+
+
+void AliTPCseed::GetShape(AliTPCclusterMI* cluster, AliExternalTrackParam * param,
+ Double_t& rmsy, Double_t &rmsz)
+{
+ //
+ // Get cluster error at given position
+ //
+ AliTPCClusterParam *clusterParam = AliTPCcalibDB::Instance()->GetClusterParam();
+ Double_t tany,tanz;
+ Double_t snp1=param->GetSnp();
+ tany=snp1/TMath::Sqrt((1.-snp1)*(1.+snp1));
+ //
+ Double_t tgl1=param->GetTgl();
+ tanz=tgl1/TMath::Sqrt((1.-snp1)*(1.+snp1));
+ //
+ Int_t padSize = 0; // short pads
+ if (cluster->GetDetector() >= 36) {
+ padSize = 1; // medium pads
+ if (cluster->GetRow() > 63) padSize = 2; // long pads
+ }
+
+ rmsy = clusterParam->GetRMSQ( 0, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tany), TMath::Abs(cluster->GetMax()) );
+ rmsz = clusterParam->GetRMSQ( 1, padSize, (250.0 - TMath::Abs(cluster->GetZ())), TMath::Abs(tanz) ,TMath::Abs(cluster->GetMax()));
+}
+
+
+
+Double_t AliTPCseed::GetQCorrGeom(Float_t ty, Float_t tz){
+ //Geoetrical
+ //ty - tangent in local y direction
+ //tz - tangent
+ //
+ Float_t norm=TMath::Sqrt(1+ty*ty+tz*tz);
+ return norm;
+}
+
+Double_t AliTPCseed::GetQCorrShape(Int_t ipad, Int_t type,Float_t z, Float_t ty, Float_t tz, Float_t /*q*/, Float_t /*thr*/){
+ //
+ // Q normalization
+ //
+ // return value = Q Normalization factor
+ // Normalization - 1 - shape factor part for full drift
+ // 1 - electron attachment for 0 drift
+
+ // Input parameters:
+ //
+ // ipad - 0 short pad
+ // 1 medium pad
+ // 2 long pad
+ //
+ // type - 0 qmax
+ // - 1 qtot
+ //
+ //z - z position (-250,250 cm)
+ //ty - tangent in local y direction
+ //tz - tangent
+ //
+
+ AliTPCClusterParam * paramCl = AliTPCcalibDB::Instance()->GetClusterParam();
+ AliTPCParam * paramTPC = AliTPCcalibDB::Instance()->GetParameters();
+
+ if (!paramCl) return 1;
+ //
+ Double_t dr = 250.-TMath::Abs(z);
+ Double_t sy = paramCl->GetRMS0( 0,ipad, dr, TMath::Abs(ty));
+ Double_t sy0= paramCl->GetRMS0(0,ipad, 250, 0);
+ Double_t sz = paramCl->GetRMS0( 1,ipad, dr, TMath::Abs(tz));
+ Double_t sz0= paramCl->GetRMS0(1,ipad, 250, 0);
+
+ Double_t sfactorMax = TMath::Sqrt(sy0*sz0/(sy*sz));
+
+
+ Double_t dt = 1000000*(dr/paramTPC->GetDriftV()); //time in microsecond
+ Double_t attProb = TMath::Exp(-paramTPC->GetAttCoef()*paramTPC->GetOxyCont()*dt);
+ //
+ //
+ if (type==0) return sfactorMax*attProb;
+
+ return attProb;
+
+
+}
+
+
+//_______________________________________________________________________
+Float_t AliTPCseed::GetTPCClustInfo(Int_t nNeighbours, Int_t type, Int_t row0, Int_t row1)
+{
+ //
+ // TPC cluster information
+ // type 0: get fraction of found/findable clusters with neighbourhood definition
+ // 1: found clusters
+ // 2: findable (number of clusters above and below threshold)
+ //
+ // definition of findable clusters:
+ // a cluster is defined as findable if there is another cluster
+ // within +- nNeighbours pad rows. The idea is to overcome threshold
+ // effects with a very simple algorithm.
+ //
+
+ const Float_t kClusterShapeCut = 1.5; // IMPPRTANT TO DO: move value to AliTPCRecoParam
+ const Float_t ktany = TMath::Tan(TMath::DegToRad()*10);
+ const Float_t kedgey =3.;
+
+ Float_t ncl = 0;
+ Float_t nclBelowThr = 0; // counts number of clusters below threshold
+
+ for (Int_t irow=row0; irow<row1; irow++){
+ AliTPCclusterMI* cluster = GetClusterPointer(irow);
+
+ if (!cluster && irow > 1 && irow < 157) {
+ Bool_t isClBefore = kFALSE;
+ Bool_t isClAfter = kFALSE;
+ for(Int_t ithres = 1; ithres <= nNeighbours; ithres++) {
+ AliTPCclusterMI * clusterBefore = GetClusterPointer(irow - ithres);
+ if (clusterBefore) isClBefore = kTRUE;
+ AliTPCclusterMI * clusterAfter = GetClusterPointer(irow + ithres);
+ if (clusterAfter) isClAfter = kTRUE;
+ }
+ if (isClBefore && isClAfter) nclBelowThr++;
+ }
+ if (!cluster) continue;
+ //
+ //
+ if (TMath::Abs(cluster->GetY())>cluster->GetX()*ktany-kedgey) continue; // edge cluster
+ //
+ AliTPCTrackerPoint * point = GetTrackPoint(irow);
+ if (point==0) continue;
+ Float_t rsigmay = TMath::Sqrt(point->GetSigmaY());
+ if (rsigmay > kClusterShapeCut) continue;
+ //
+ if (cluster->IsUsed(11)) continue; // remove shared clusters for PbPb
+ ncl++;
+ }
+
+ if(ncl<10)
+ return 0;
+ if(type==0)
+ if(nclBelowThr+ncl>0)
+ return ncl/(nclBelowThr+ncl);
+ if(type==1)
+ return ncl;
+ if(type==2)
+ return ncl+nclBelowThr;
+ return 0;
+}
+//_______________________________________________________________________
+Int_t AliTPCseed::GetNumberOfClustersIndices() {
+ Int_t ncls = 0;
+ for (int i=0; i < 160; i++) {
+ if ((fIndex[i] & 0x8000) == 0)
+ ncls++;
+ }
+ return ncls;
+}
+
+//_______________________________________________________________________
+void AliTPCseed::Clear(Option_t*)
+{
+ // formally seed may allocate memory for clusters (althought this should not happen for
+ // the seeds in the pool). Hence we need this method for fwd. compatibility
+ if (fClusterOwner) for (int i=160;i--;) {delete fClusterPointer[i]; fClusterPointer[i] = 0;}
+}
+
+TObject* AliTPCseed::Clone(const char* newname) const
+{
+ // temporary override TObject::Clone to avoid crashes in reco
+ AliTPCseed* src = (AliTPCseed*)this;
+ AliTPCseed* dst = new AliTPCseed(*src,fClusterOwner);
+ return dst;
+}