+Int_t AliTRDtrackV1::GetSector() const
+{
+ return Int_t(GetAlpha()/AliTRDgeometry::GetAlpha() + (GetAlpha()>0. ? 0 : AliTRDgeometry::kNsector));
+}
+
+//_______________________________________________________________
+Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
+{
+ // Checks whether two tracks are equal
+ if (!o) return kFALSE;
+ const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
+ if (!inTrack) return kFALSE;
+
+ //if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
+
+ for(Int_t i = 0; i < AliPID::kSPECIES; i++){
+ if ( fPID[i] != inTrack->GetPID(i) ) return kFALSE;
+ }
+
+ for (Int_t i = 0; i < 3; i++){
+ if ( fBudget[i] != inTrack->GetBudget(i) ) return kFALSE;
+ }
+ if ( fDE != inTrack->GetEdep() ) return kFALSE;
+ if ( fFakeRatio != inTrack->GetFakeRatio() ) return kFALSE;
+ if ( fChi2 != inTrack->GetChi2() ) return kFALSE;
+ if ( fMass != inTrack->GetMass() ) return kFALSE;
+ if ( fLab != inTrack->GetLabel() ) return kFALSE;
+ if ( fN != inTrack->GetNumberOfClusters() ) return kFALSE;
+ if ( AliKalmanTrack::GetIntegratedLength() != inTrack->GetIntegratedLength() ) return kFALSE;
+
+ if ( GetX() != inTrack->GetX() ) return kFALSE;
+ if ( GetAlpha() != inTrack->GetAlpha() ) return kFALSE;
+ const Double_t *inP = inTrack->GetParameter();
+ const Double_t *curP = GetParameter();
+ for (Int_t i = 0; i < 5; i++){
+ if ( curP[i] != inP[i]) return kFALSE;
+ }
+ const Double_t *inC = inTrack->GetCovariance();
+ const Double_t *curC = GetCovariance();
+ for (Int_t i = 0; i < 15; i++){
+ if ( curC[i] != inC[i]) return kFALSE;
+ }
+
+ for (Int_t iTracklet = 0; iTracklet < kNplane; iTracklet++){
+ AliTRDseedV1 *curTracklet = fTracklet[iTracklet];
+ AliTRDseedV1 *inTracklet = inTrack->GetTracklet(iTracklet);
+ if (curTracklet && inTracklet){
+ if (! curTracklet->IsEqual(inTracklet) ) {
+ curTracklet->Print();
+ inTracklet->Print();
+ return kFALSE;
+ }
+ } else {
+ // if one tracklet exists, and corresponding
+ // in other track doesn't - return kFALSE
+ if(inTracklet || curTracklet) return kFALSE;
+ }
+ }
+
+ return kTRUE;
+}
+
+//_______________________________________________________________
+Bool_t AliTRDtrackV1::IsElectron() const
+{
+ if(GetPID(0) > fkReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
+ return kFALSE;
+}
+
+
+//_____________________________________________________________________________
+Int_t AliTRDtrackV1::MakeBackupTrack()
+{
+//
+// Creates a backup track
+// TO DO update quality check of the track.
+//
+
+ Float_t occupancy(0.); Int_t n(0), ncls(0);
+ for(Int_t il(AliTRDgeometry::kNlayer); il--;){
+ if(!fTracklet[il]) continue;
+ n++;
+ occupancy+=fTracklet[il]->GetOccupancyTB();
+ ncls += fTracklet[il]->GetN();
+ }
+ if(!n) return -1;
+ occupancy/=n;
+
+ //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
+
+ Int_t failedCutId(0);
+ if(GetChi2()/n > 5.0) failedCutId=1;
+ if(occupancy < 0.7) failedCutId=2;
+ //if(ratio1 > 0.6) &&
+ //if(ratio0+ratio1 > 1.5) &&
+ if(GetNCross() != 0) failedCutId=3;
+ if(TMath::Abs(GetSnp()) > 0.85) failedCutId=4;
+ if(ncls < 20) failedCutId=5;
+
+ if(failedCutId){
+ AliDebug(2, Form("\n"
+ "chi2/tracklet < 5.0 [%c] %5.2f\n"
+ "occupancy > 0.7 [%c] %4.2f\n"
+ "NCross == 0 [%c] %d\n"
+ "Abs(snp) < 0.85 [%c] %4.2f\n"
+ "NClusters > 20 [%c] %d"
+ ,(GetChi2()/n<5.0)?'y':'n', GetChi2()/n
+ ,(occupancy>0.7)?'y':'n', occupancy
+ ,(GetNCross()==0)?'y':'n', GetNCross()
+ ,(TMath::Abs(GetSnp())<0.85)?'y':'n', TMath::Abs(GetSnp())
+ ,(ncls>20)?'y':'n', ncls
+ ));
+ return failedCutId;
+ }
+
+ if(fBackupTrack) {
+ fBackupTrack->~AliTRDtrackV1();
+ new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
+ return 0;
+ }
+ fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
+ return 0;
+}
+
+//_____________________________________________________________________________
+Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z) const