[u/mrichter/AliRoot.git] / TRD / AliTRDtrackV1.cxx

/**************************************************************************
 * 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.                  *
 **************************************************************************/

/* $Id$ */

#include "AliESDtrack.h"
#include "AliTracker.h"

#include "AliTRDtrackV1.h"
#include "AliTRDcluster.h"
#include "AliTRDcalibDB.h"
#include "AliTRDReconstructor.h"
#include "AliTRDrecoParam.h"

ClassImp(AliTRDtrackV1)

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  Represents a reconstructed TRD track                                     //
//  Local TRD Kalman track                                                   //
//                                                                           //
//  Authors:                                                                 //
//    Alex Bercuci <A.Bercuci@gsi.de>                                        //
//    Markus Fasel <M.Fasel@gsi.de>                                          //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

//_______________________________________________________________
AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
  ,fPIDquality(0)
  ,fDE(0.)
  ,fBackupTrack(0x0)
{
  //
  // Default constructor
  //
  for(int i =0; i<3; i++) fBudget[i] = 0.;
  
  Float_t pid = 1./AliPID::kSPECIES;
  for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;

  for(int ip=0; ip<kNplane; ip++){
    fTrackletIndex[ip] = 0xffff;
    fTracklet[ip]      = 0x0;
  }
}

//_______________________________________________________________
AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
  ,fPIDquality(ref.fPIDquality)
  ,fDE(ref.fDE)
  ,fBackupTrack(0x0)
{
  //
  // Copy constructor
  //

  for(int ip=0; ip<kNplane; ip++){ 
    fTrackletIndex[ip] = ref.fTrackletIndex[ip];
    fTracklet[ip]      = ref.fTracklet[ip];
  }

  for (Int_t i = 0; i < 3;i++) fBudget[i]      = ref.fBudget[i];

	for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
  
  AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
}

//_______________________________________________________________
AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
  ,fPIDquality(0)
  ,fDE(0.)
  ,fBackupTrack(0x0)
{
  //
  // Constructor from AliESDtrack
  //

  SetLabel(t.GetLabel());
  SetChi2(0.0);
  SetMass(t.GetMass());
  AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls()); 
  Int_t ti[kNplane]; t.GetTRDtracklets(&ti[0]);
  for(int ip=0; ip<kNplane; ip++){ 
    fTrackletIndex[ip] = ti[ip] < 0 ? 0xffff : ti[ip];
    fTracklet[ip]      = 0x0;
  }
  for(int i =0; i<3; i++) fBudget[i] = 0.;
  
  Float_t pid = 1./AliPID::kSPECIES;
  for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;

  const AliExternalTrackParam *par = &t;
  if (t.GetStatus() & AliESDtrack::kTRDbackup) { 
    par = t.GetOuterParam();
    if (!par) {
      AliError("No backup info!"); 
      par = &t;
    }
  }
  Set(par->GetX() 
     ,par->GetAlpha()
     ,par->GetParameter()
     ,par->GetCovariance());

  if(t.GetStatus() & AliESDtrack::kTIME) {
    StartTimeIntegral();
    Double_t times[10]; 
    t.GetIntegratedTimes(times); 
    SetIntegratedTimes(times);
    SetIntegratedLength(t.GetIntegratedLength());
  }
}

//_______________________________________________________________
AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 *trklts, const Double_t p[5], const Double_t cov[15]
             , Double_t x, Double_t alpha) : AliKalmanTrack()
  ,fPIDquality(0)
  ,fDE(0.)
  ,fBackupTrack(0x0)
{
  //
  // The stand alone tracking constructor
  // TEMPORARY !!!!!!!!!!!
  // to check :
  // 1. covariance matrix
  // 2. dQdl calculation
  //

  Double_t cnv = GetBz() < 1.e-5 ? 1.e5 : 1.0 / (GetBz() * kB2C);
  //  Double_t cnv   = 1.0 / (GetBz() * kB2C);

  Double_t pp[5] = { p[0]    
                   , p[1]
                   , x*p[4] - p[2]
                   , p[3]
                   , p[4]*cnv      };

  Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[ 5];
  Double_t c32 =   x*cov[13] -     cov[ 8];
  Double_t c20 =   x*cov[10] -     cov[ 3];
  Double_t c21 =   x*cov[11] -     cov[ 4];
  Double_t c42 =   x*cov[14] -     cov[12];

  Double_t cc[15] = { cov[ 0]
                    , cov[ 1],     cov[ 2]
                    , c20,         c21,         c22
                    , cov[ 6],     cov[ 7],     c32,     cov[ 9]
                    , cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv };

  Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
  Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
  Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0);
  pp[4] = w0*p0 + w1*pp[4];
  cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1;

	Set(x,alpha,pp,cc);
  Int_t ncls = 0;
	for(int iplane=0; iplane<kNplane; iplane++){
    fTrackletIndex[iplane] = 0xffff;
		if(!trklts[iplane].IsOK()) fTracklet[iplane] = 0x0;
    else{ 
      fTracklet[iplane] = new AliTRDseedV1(trklts[iplane]);
      ncls += fTracklet[iplane]->GetN();
    }
	}
  AliKalmanTrack::SetNumberOfClusters(ncls);		
  for(int i =0; i<3; i++) fBudget[i] = 0.;
  
  Float_t pid = 1./AliPID::kSPECIES;
  for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;

}

//_______________________________________________________________
AliTRDtrackV1::~AliTRDtrackV1()
{
  if(fBackupTrack) {
    delete fBackupTrack;
  }
  fBackupTrack = 0x0;

  if(TestBit(1)){
    for(Int_t ip=0; ip<kNplane; ip++){
      if(fTracklet[ip]) delete fTracklet[ip];
      fTracklet[ip] = 0x0;
    }
  }
}
	
//_______________________________________________________________
Bool_t AliTRDtrackV1::CookLabel(Float_t wrong)
{
  // set MC label for this track
  
  Int_t s[kMAXCLUSTERSPERTRACK][2];
  for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
    s[i][0] = -1;
    s[i][1] =  0;
  }
  
  Bool_t labelAdded;
  Int_t label;
  AliTRDcluster *c    = 0x0;
  for (Int_t ip = 0; ip < kNplane; ip++) {
    if(fTrackletIndex[ip] == 0xffff) continue;
    for (Int_t ic = 0; ic < AliTRDseed::knTimebins; ic++) {
      if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
      for (Int_t k = 0; k < 3; k++) { 
        label      = c->GetLabel(k);
        labelAdded = kFALSE; 
        Int_t j = 0;
        if (label >= 0) {
          while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) {
            if ((s[j][0] == label) || 
                (s[j][1] ==     0)) {
              s[j][0] = label; 
              s[j][1]++; 
              labelAdded = kTRUE;
            }
            j++;
          }
        }
      }
    }
  }
  
  Int_t max = 0;
  label = -123456789;
  for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
    if (s[i][1] <= max) continue;
    max   = s[i][1]; 
    label = s[i][0];
  }
  
  if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label;
  
  SetLabel(label); 
  
  return kTRUE;
}

//_______________________________________________________________
Bool_t AliTRDtrackV1::CookPID()
{
  //
  // Cook the PID information
  //
  
  // Reset the a priori probabilities
  Double_t pid = 1. / AliPID::kSPECIES;
  for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
    fPID[ispec] = pid;	
  }
  fPIDquality = 0;
  
  // steer PID calculation @ tracklet level
  Double_t *prob = 0x0;
  for(int ip=0; ip<kNplane; ip++){
    if(fTrackletIndex[ip] == 0xffff) continue;
    if(!fTracklet[ip]->IsOK()) continue;
    if(!(prob = fTracklet[ip]->GetProbability())) return kFALSE;
    
    Int_t nspec = 0; // quality check of tracklet dEdx
    for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
      if(prob[ispec] < 0.) continue;
      fPID[ispec] *= prob[ispec];
      nspec++;
    }
    if(!nspec) continue;
    
    fPIDquality++;
  }
  
  // no tracklet found for PID calculations
  if(!fPIDquality) return kTRUE;
  
  // slot for PID calculation @ track level
  
  
  // normalize probabilities
  Double_t probTotal = 0.0;
  for (Int_t is = 0; is < AliPID::kSPECIES; is++) probTotal += fPID[is];
  
  
  if (probTotal <= 0.0) {
    AliWarning("The total probability over all species <= 0. This may be caused by some error in the reference data.");
    return kFALSE;
  }
  
  for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) fPID[iSpecies] /= probTotal;
  
  return kTRUE;
}

//_____________________________________________________________________________
Double_t AliTRDtrackV1::GetBz() const 
{
  //
  // Returns Bz component of the magnetic field (kG)
  //

  if (AliTracker::UniformField()) return AliTracker::GetBz();

  Double_t r[3]; 
  GetXYZ(r);
  return AliTracker::GetBz(r);
}

//_______________________________________________________________
Int_t  AliTRDtrackV1::GetClusterIndex(Int_t id) const
{
  Int_t n = 0;
  for(Int_t ip=0; ip<kNplane; ip++){
    if(!fTracklet[ip]) continue;
    if(n+fTracklet[ip]->GetN() < id){ 
      n+=fTracklet[ip]->GetN();
      continue;
    }
    for(Int_t ic=34; ic>=0; ic--){
      if(!fTracklet[ip]->GetClusters(ic)) continue;
      n++;
      if(n<id) continue;
      return fTracklet[ip]->GetIndexes(ic);
    }
  }
  return -1;
}

//_______________________________________________________________
Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt) const
{
  //
  // Get the predicted chi2
  //
  
  Double_t x      = trklt->GetX0();
  Double_t p[2]   = { trklt->GetYat(x)
                    , trklt->GetZat(x) };
  Double_t cov[3];
  trklt->GetCovAt(x, cov);
  
  return AliExternalTrackParam::GetPredictedChi2(p, cov);
}

	
//_____________________________________________________________________________
void AliTRDtrackV1::MakeBackupTrack()
{
  //
  // Creates a backup track
  //

  if(fBackupTrack) {
    fBackupTrack->~AliTRDtrackV1();
    new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
    return;
  }
  fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
}

//_____________________________________________________________________________
Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z)
{
  //
  // Find a prolongation at given x
  // Return 0 if it does not exist
  //  

  Double_t bz = GetBz();
  if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return 0;
  if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return 0;

  return 1;  

}

//_____________________________________________________________________________
Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
{
  //
  // Propagates this track to a reference plane defined by "xk" [cm] 
  // correcting for the mean crossed material.
  //
  // "xx0"  - thickness/rad.length [units of the radiation length] 
  // "xrho" - thickness*density    [g/cm^2] 
  // 

  if (xk == GetX()) {
    return kTRUE;
  }

  Double_t oldX = GetX();
  Double_t oldY = GetY();
  Double_t oldZ = GetZ();

  Double_t bz   = GetBz();

  if (!AliExternalTrackParam::PropagateTo(xk,bz)) {
    return kFALSE;
  }

  Double_t x = GetX();
  Double_t y = GetY();
  Double_t z = GetZ();

  if (oldX < xk) {
    xrho = -xrho;
    if (IsStartedTimeIntegral()) {
      Double_t l2  = TMath::Sqrt((x-oldX)*(x-oldX) 
                               + (y-oldY)*(y-oldY) 
                               + (z-oldZ)*(z-oldZ));
      Double_t crv = AliExternalTrackParam::GetC(bz);
      if (TMath::Abs(l2*crv) > 0.0001) {
        // Make correction for curvature if neccesary
        l2 = 0.5 * TMath::Sqrt((x-oldX)*(x-oldX) 
                             + (y-oldY)*(y-oldY));
        l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
        l2 = TMath::Sqrt(l2*l2 + (z-oldZ)*(z-oldZ));
      }
      AddTimeStep(l2);
    }
  }

  if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0,xrho,GetMass())) { 
    return kFALSE;
  }

  {

    // Energy losses
    Double_t p2    = (1.0 + GetTgl()*GetTgl()) / (GetSigned1Pt()*GetSigned1Pt());
    Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
    if ((beta2 < 1.0e-10) || 
        ((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
      return kFALSE;
    }

    Double_t dE    = 0.153e-3 / beta2 
                   * (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
                   * xrho;
    fBudget[0] += xrho;

    /*
    // Suspicious part - think about it ?
    Double_t kinE =  TMath::Sqrt(p2);
    if (dE > 0.8*kinE) dE = 0.8 * kinE;  //      
    if (dE < 0)        dE = 0.0;         // Not valid region for Bethe bloch 
    */
 
    fDE += dE;

    /*
    // Suspicious ! I.B.
    Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE));   // Energy loss fluctuation 
    Double_t sigmac2 = sigmade*sigmade*fC*fC*(p2+GetMass()*GetMass())/(p2*p2);
    fCcc += sigmac2;
    fCee += fX*fX * sigmac2;  
    */

  }

  return kTRUE;
}

//_____________________________________________________________________________
Int_t   AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
{
  //
  // Propagate track to the radial position
  // Rotation always connected to the last track position
  //

  Double_t xyz0[3];
  Double_t xyz1[3];
  Double_t y;
  Double_t z; 

  Double_t radius = TMath::Sqrt(GetX()*GetX() + GetY()*GetY());
  // Direction +-
  Double_t dir    = (radius > r) ? -1.0 : 1.0;   

  for (Double_t x = radius+dir*step; dir*x < dir*r; x += dir*step) {

    GetXYZ(xyz0);	
    Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
    Rotate(alpha,kTRUE);
    GetXYZ(xyz0);	
    GetProlongation(x,y,z);
    xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha); 
    xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
    xyz1[2] = z;
    Double_t param[7];
    AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
    if (param[1] <= 0) {
      param[1] = 100000000;
    }
    PropagateTo(x,param[1],param[0]*param[4]);

  } 

  GetXYZ(xyz0);	
  Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
  Rotate(alpha,kTRUE);
  GetXYZ(xyz0);	
  GetProlongation(r,y,z);
  xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha); 
  xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
  xyz1[2] = z;
  Double_t param[7];
  AliTracker::MeanMaterialBudget(xyz0,xyz1,param);

  if (param[1] <= 0) {
    param[1] = 100000000;
  }
  PropagateTo(r,param[1],param[0]*param[4]);

  return 0;

}

//_____________________________________________________________________________
Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
{
  //
  // Rotates track parameters in R*phi plane
  // if absolute rotation alpha is in global system
  // otherwise alpha rotation is relative to the current rotation angle
  //  

  if (absolute) alpha -= GetAlpha();
  //else fNRotate++;

  return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
}

//___________________________________________________________
void AliTRDtrackV1::SetNumberOfClusters() 
{
// Calculate the number of clusters attached to this track
	
  Int_t ncls = 0;
  for(int ip=0; ip<kNplane; ip++){
    if(fTracklet[ip] && fTrackletIndex[ip] != 0xffff) ncls += fTracklet[ip]->GetN();
  }
  AliKalmanTrack::SetNumberOfClusters(ncls);	
}

	
//_______________________________________________________________
void AliTRDtrackV1::SetOwner()
{
  //
  // Toggle ownership of tracklets
  //

  if(TestBit(1)) return;
  for (Int_t ip = 0; ip < kNplane; ip++) {
    if(fTrackletIndex[ip] == 0xffff) continue;
    fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
    fTracklet[ip]->SetOwner();
  }
  SetBit(1);
}

//_______________________________________________________________
void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *trklt, Int_t index)
{
  //
  // Set the tracklets
  //
  Int_t plane = trklt->GetPlane();
  if(fTrackletIndex[plane]==0xffff && fTracklet[plane]){ 
    delete fTracklet[plane];
  }
  fTracklet[plane]      = trklt;
  fTrackletIndex[plane] = index;
}

//_______________________________________________________________
Bool_t  AliTRDtrackV1::Update(AliTRDseedV1 *trklt, Double_t chisq)
{
  //
  // Update track and tracklet parameters 
  //
  
  Double_t x      = trklt->GetX0();
  Double_t p[2]   = { trklt->GetYat(x)
                    , trklt->GetZat(x) };
  Double_t cov[3];
  trklt->GetCovAt(x, cov);
  
  // insert systematic uncertainties calibration and misalignment
  Double_t sys[15];
  AliTRDReconstructor::RecoParam()->GetSysCovMatrix(sys);
  cov[0] += (sys[0]*sys[0]);
  cov[2] += (sys[1]*sys[1]);

  if(!AliExternalTrackParam::Update(p, cov)) return kFALSE;
  
  AliTRDcluster *c = 0x0;
  Int_t ic = 0; while(!(c = trklt->GetClusters(ic))) ic++;
  AliTracker::FillResiduals(this, p, cov, c->GetVolumeId());
  
  
  // Register info to track
  SetNumberOfClusters();
  SetChi2(GetChi2() + chisq);
  
  // update tracklet
  trklt->SetMomentum(GetP());
  trklt->SetSnp(GetSnp());
  trklt->SetTgl(GetTgl());
  return kTRUE;
}

//_______________________________________________________________
void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
{
  //
  // Update the TRD PID information in the ESD track
  //

  track->SetNumberOfTRDslices(kNslice);

  for (Int_t ip = 0; ip < kNplane; ip++) {
    if(fTrackletIndex[ip] == 0xffff) continue;
    fTracklet[ip]->CookdEdx(kNslice);
    Float_t *dedx = fTracklet[ip]->GetdEdx();
    for (Int_t js = 0; js < kNslice; js++) track->SetTRDslice(dedx[js], ip, js);
  }

  // copy PID to ESD
  track->SetTRDpid(fPID);
  track->SetTRDpidQuality(fPIDquality);
}
Commit	Line	Data
d9950a5a	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/* $Id$ */
	17
eb38ed55	18	#include "AliESDtrack.h"
41880fac	19	#include "AliTracker.h"
eb38ed55	20
d9950a5a	21	#include "AliTRDtrackV1.h"
	22	#include "AliTRDcluster.h"
	23	#include "AliTRDcalibDB.h"
3afdab72	24	#include "AliTRDReconstructor.h"
d9950a5a	25	#include "AliTRDrecoParam.h"
d9950a5a	26
d9950a5a	27	ClassImp(AliTRDtrackV1)
d9950a5a	28
0906e73e	29	///////////////////////////////////////////////////////////////////////////////
	30	// //
	31	// Represents a reconstructed TRD track //
	32	// Local TRD Kalman track //
	33	// //
	34	// Authors: //
	35	// Alex Bercuci <A.Bercuci@gsi.de> //
	36	// Markus Fasel <M.Fasel@gsi.de> //
	37	// //
	38	///////////////////////////////////////////////////////////////////////////////
d9950a5a	39
d9950a5a	40	//_______________________________________________________________
3b57a3f7	41	AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
	42	,fPIDquality(0)
	43	,fDE(0.)
	44	,fBackupTrack(0x0)
0906e73e	45	{
d9950a5a	46	//
	47	// Default constructor
	48	//
3b57a3f7	49	for(int i =0; i<3; i++) fBudget[i] = 0.;
	50
	51	Float_t pid = 1./AliPID::kSPECIES;
	52	for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
	53
	54	for(int ip=0; ip<kNplane; ip++){
	55	fTrackletIndex[ip] = 0xffff;
	56	fTracklet[ip] = 0x0;
	57	}
d9950a5a	58	}
	59
	60	//_______________________________________________________________
3b57a3f7	61	AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
	62	,fPIDquality(ref.fPIDquality)
	63	,fDE(ref.fDE)
	64	,fBackupTrack(0x0)
d9950a5a	65	{
d9950a5a	66	//
3b57a3f7	67	// Copy constructor
d9950a5a	68	//
d9950a5a	69
3b57a3f7	70	for(int ip=0; ip<kNplane; ip++){
	71	fTrackletIndex[ip] = ref.fTrackletIndex[ip];
	72	fTracklet[ip] = ref.fTracklet[ip];
	73	}
	74
	75	for (Int_t i = 0; i < 3;i++) fBudget[i] = ref.fBudget[i];
	76
	77	for(Int_t is = 0; is<AliPID::kSPECIES; is++) fPID[is] = ref.fPID[is];
	78
	79	AliKalmanTrack::SetNumberOfClusters(ref.GetNumberOfClusters());
d9950a5a	80	}
	81
	82	//_______________________________________________________________
3b57a3f7	83	AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
	84	,fPIDquality(0)
	85	,fDE(0.)
	86	,fBackupTrack(0x0)
d9950a5a	87	{
d9950a5a	88	//
3b57a3f7	89	// Constructor from AliESDtrack
d9950a5a	90	//
d9950a5a	91
3b57a3f7	92	SetLabel(t.GetLabel());
	93	SetChi2(0.0);
	94	SetMass(t.GetMass());
	95	AliKalmanTrack::SetNumberOfClusters(t.GetTRDncls());
	96	Int_t ti[kNplane]; t.GetTRDtracklets(&ti[0]);
	97	for(int ip=0; ip<kNplane; ip++){
	98	fTrackletIndex[ip] = ti[ip] < 0 ? 0xffff : ti[ip];
	99	fTracklet[ip] = 0x0;
	100	}
	101	for(int i =0; i<3; i++) fBudget[i] = 0.;
	102
	103	Float_t pid = 1./AliPID::kSPECIES;
	104	for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
	105
	106	const AliExternalTrackParam *par = &t;
	107	if (t.GetStatus() & AliESDtrack::kTRDbackup) {
	108	par = t.GetOuterParam();
	109	if (!par) {
	110	AliError("No backup info!");
	111	par = &t;
	112	}
	113	}
	114	Set(par->GetX()
	115	,par->GetAlpha()
	116	,par->GetParameter()
	117	,par->GetCovariance());
	118
	119	if(t.GetStatus() & AliESDtrack::kTIME) {
	120	StartTimeIntegral();
	121	Double_t times[10];
	122	t.GetIntegratedTimes(times);
	123	SetIntegratedTimes(times);
	124	SetIntegratedLength(t.GetIntegratedLength());
	125	}
d9950a5a	126	}
d9950a5a	127
d9950a5a	128	//_______________________________________________________________
eb38ed55	129	AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 *trklts, const Double_t p[5], const Double_t cov[15]
3b57a3f7	130	, Double_t x, Double_t alpha) : AliKalmanTrack()
	131	,fPIDquality(0)
	132	,fDE(0.)
	133	,fBackupTrack(0x0)
d9950a5a	134	{
0906e73e	135	//
	136	// The stand alone tracking constructor
	137	// TEMPORARY !!!!!!!!!!!
	138	// to check :
	139	// 1. covariance matrix
	140	// 2. dQdl calculation
	141	//
d9950a5a	142
fb17de1f	143	Double_t cnv = GetBz() < 1.e-5 ? 1.e5 : 1.0 / (GetBz() * kB2C);
fb17de1f	144	// Double_t cnv = 1.0 / (GetBz() * kB2C);
d9950a5a	145
	146	Double_t pp[5] = { p[0]
	147	, p[1]
	148	, x*p[4] - p[2]
	149	, p[3]
	150	, p[4]*cnv };
	151
	152	Double_t c22 = xxcov[14] - 2xcov[12] + cov[ 5];
	153	Double_t c32 = x*cov[13] - cov[ 8];
	154	Double_t c20 = x*cov[10] - cov[ 3];
	155	Double_t c21 = x*cov[11] - cov[ 4];
	156	Double_t c42 = x*cov[14] - cov[12];
	157
	158	Double_t cc[15] = { cov[ 0]
	159	, cov[ 1], cov[ 2]
	160	, c20, c21, c22
	161	, cov[ 6], cov[ 7], c32, cov[ 9]
	162	, cov[10]cnv, cov[11]cnv, c42cnv, cov[13]cnv, cov[14]cnvcnv };
ae3fbe1f	163
	164	Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt();
	165	Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]);
	166	Double_t w0=cc[14]/(cc[14] + p0p0), w1=p0p0/(cc[14] + p0*p0);
	167	pp[4] = w0p0 + w1pp[4];
	168	cc[10]=w1; cc[11]=w1; cc[12]=w1; cc[13]=w1; cc[14]*=w1;
	169
d9950a5a	170	Set(x,alpha,pp,cc);
41702fec	171	Int_t ncls = 0;
3b57a3f7	172	for(int iplane=0; iplane<kNplane; iplane++){
41702fec	173	fTrackletIndex[iplane] = 0xffff;
	174	if(!trklts[iplane].IsOK()) fTracklet[iplane] = 0x0;
	175	else{
	176	fTracklet[iplane] = new AliTRDseedV1(trklts[iplane]);
	177	ncls += fTracklet[iplane]->GetN();
	178	}
d9950a5a	179	}
41702fec	180	AliKalmanTrack::SetNumberOfClusters(ncls);
	181	for(int i =0; i<3; i++) fBudget[i] = 0.;
	182
	183	Float_t pid = 1./AliPID::kSPECIES;
	184	for(int is =0; is<AliPID::kSPECIES; is++) fPID[is] = pid;
	185
d9950a5a	186	}
d9950a5a	187
bb56afff	188	//_______________________________________________________________
3b57a3f7	189	AliTRDtrackV1::~AliTRDtrackV1()
bb56afff	190	{
3b57a3f7	191	if(fBackupTrack) {
	192	delete fBackupTrack;
	193	}
	194	fBackupTrack = 0x0;
bb56afff	195
3b57a3f7	196	if(TestBit(1)){
	197	for(Int_t ip=0; ip<kNplane; ip++){
	198	if(fTracklet[ip]) delete fTracklet[ip];
	199	fTracklet[ip] = 0x0;
	200	}
	201	}
	202	}
	203
	204	//_______________________________________________________________
	205	Bool_t AliTRDtrackV1::CookLabel(Float_t wrong)
	206	{
	207	// set MC label for this track
	208
bb56afff	209	Int_t s[kMAXCLUSTERSPERTRACK][2];
	210	for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
	211	s[i][0] = -1;
	212	s[i][1] = 0;
	213	}
3b57a3f7	214
bb56afff	215	Bool_t labelAdded;
3b57a3f7	216	Int_t label;
	217	AliTRDcluster *c = 0x0;
	218	for (Int_t ip = 0; ip < kNplane; ip++) {
	219	if(fTrackletIndex[ip] == 0xffff) continue;
	220	for (Int_t ic = 0; ic < AliTRDseed::knTimebins; ic++) {
	221	if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
	222	for (Int_t k = 0; k < 3; k++) {
	223	label = c->GetLabel(k);
	224	labelAdded = kFALSE;
	225	Int_t j = 0;
	226	if (label >= 0) {
	227	while ((!labelAdded) && (j < kMAXCLUSTERSPERTRACK)) {
	228	if ((s[j][0] == label) \|\|
	229	(s[j][1] == 0)) {
	230	s[j][0] = label;
	231	s[j][1]++;
	232	labelAdded = kTRUE;
	233	}
	234	j++;
	235	}
	236	}
	237	}
	238	}
	239	}
	240
bb56afff	241	Int_t max = 0;
	242	label = -123456789;
	243	for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
	244	if (s[i][1] <= max) continue;
3b57a3f7	245	max = s[i][1];
3b57a3f7	246	label = s[i][0];
bb56afff	247	}
3b57a3f7	248
bb56afff	249	if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label;
3b57a3f7	250
bb56afff	251	SetLabel(label);
3b57a3f7	252
3b57a3f7	253	return kTRUE;
bb56afff	254	}
bb56afff	255
d9950a5a	256	//_______________________________________________________________
	257	Bool_t AliTRDtrackV1::CookPID()
	258	{
0906e73e	259	//
	260	// Cook the PID information
	261	//
3b57a3f7	262
	263	// Reset the a priori probabilities
	264	Double_t pid = 1. / AliPID::kSPECIES;
0906e73e	265	for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
3b57a3f7	266	fPID[ispec] = pid;
	267	}
	268	fPIDquality = 0;
	269
	270	// steer PID calculation @ tracklet level
	271	Double_t *prob = 0x0;
	272	for(int ip=0; ip<kNplane; ip++){
	273	if(fTrackletIndex[ip] == 0xffff) continue;
	274	if(!fTracklet[ip]->IsOK()) continue;
	275	if(!(prob = fTracklet[ip]->GetProbability())) return kFALSE;
	276
	277	Int_t nspec = 0; // quality check of tracklet dEdx
	278	for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
	279	if(prob[ispec] < 0.) continue;
	280	fPID[ispec] *= prob[ispec];
	281	nspec++;
	282	}
	283	if(!nspec) continue;
	284
	285	fPIDquality++;
0906e73e	286	}
0906e73e	287
	288	// no tracklet found for PID calculations
	289	if(!fPIDquality) return kTRUE;
3b57a3f7	290
	291	// slot for PID calculation @ track level
	292
	293
0906e73e	294	// normalize probabilities
	295	Double_t probTotal = 0.0;
	296	for (Int_t is = 0; is < AliPID::kSPECIES; is++) probTotal += fPID[is];
3b57a3f7	297
3b57a3f7	298
0906e73e	299	if (probTotal <= 0.0) {
0906e73e	300	AliWarning("The total probability over all species <= 0. This may be caused by some error in the reference data.");
d9950a5a	301	return kFALSE;
d9950a5a	302	}
3b57a3f7	303
0906e73e	304	for (Int_t iSpecies = 0; iSpecies < AliPID::kSPECIES; iSpecies++) fPID[iSpecies] /= probTotal;
3b57a3f7	305
0906e73e	306	return kTRUE;
d9950a5a	307	}
d9950a5a	308
3b57a3f7	309	//_____________________________________________________________________________
3b57a3f7	310	Double_t AliTRDtrackV1::GetBz() const
0906e73e	311	{
0906e73e	312	//
3b57a3f7	313	// Returns Bz component of the magnetic field (kG)
0906e73e	314	//
0906e73e	315
3b57a3f7	316	if (AliTracker::UniformField()) return AliTracker::GetBz();
	317
	318	Double_t r[3];
	319	GetXYZ(r);
	320	return AliTracker::GetBz(r);
	321	}
	322
	323	//_______________________________________________________________
	324	Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
	325	{
	326	Int_t n = 0;
	327	for(Int_t ip=0; ip<kNplane; ip++){
	328	if(!fTracklet[ip]) continue;
	329	if(n+fTracklet[ip]->GetN() < id){
	330	n+=fTracklet[ip]->GetN();
	331	continue;
	332	}
	333	for(Int_t ic=34; ic>=0; ic--){
	334	if(!fTracklet[ip]->GetClusters(ic)) continue;
	335	n++;
	336	if(n<id) continue;
	337	return fTracklet[ip]->GetIndexes(ic);
	338	}
	339	}
	340	return -1;
0906e73e	341	}
d9950a5a	342
	343	//_______________________________________________________________
	344	Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt) const
	345	{
	346	//
0906e73e	347	// Get the predicted chi2
d9950a5a	348	//
3b57a3f7	349
d9950a5a	350	Double_t x = trklt->GetX0();
	351	Double_t p[2] = { trklt->GetYat(x)
	352	, trklt->GetZat(x) };
	353	Double_t cov[3];
3b57a3f7	354	trklt->GetCovAt(x, cov);
3b57a3f7	355
d9950a5a	356	return AliExternalTrackParam::GetPredictedChi2(p, cov);
3b57a3f7	357	}
d9950a5a	358
3b57a3f7	359
	360	//_____________________________________________________________________________
	361	void AliTRDtrackV1::MakeBackupTrack()
	362	{
	363	//
	364	// Creates a backup track
	365	//
	366
	367	if(fBackupTrack) {
	368	fBackupTrack->~AliTRDtrackV1();
	369	new(fBackupTrack) AliTRDtrackV1((AliTRDtrackV1&)(*this));
592fdd48	370	return;
3b57a3f7	371	}
3b57a3f7	372	fBackupTrack = new AliTRDtrackV1((AliTRDtrackV1&)(*this));
d9950a5a	373	}
d9950a5a	374
3b57a3f7	375	//_____________________________________________________________________________
	376	Int_t AliTRDtrackV1::GetProlongation(Double_t xk, Double_t &y, Double_t &z)
	377	{
	378	//
	379	// Find a prolongation at given x
	380	// Return 0 if it does not exist
	381	//
	382
	383	Double_t bz = GetBz();
	384	if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return 0;
	385	if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return 0;
	386
	387	return 1;
	388
	389	}
	390
	391	//_____________________________________________________________________________
	392	Bool_t AliTRDtrackV1::PropagateTo(Double_t xk, Double_t xx0, Double_t xrho)
0906e73e	393	{
0906e73e	394	//
3b57a3f7	395	// Propagates this track to a reference plane defined by "xk" [cm]
3b57a3f7	396	// correcting for the mean crossed material.
0906e73e	397	//
3b57a3f7	398	// "xx0" - thickness/rad.length [units of the radiation length]
	399	// "xrho" - thickness*density [g/cm^2]
	400	//
0906e73e	401
3b57a3f7	402	if (xk == GetX()) {
	403	return kTRUE;
	404	}
	405
	406	Double_t oldX = GetX();
	407	Double_t oldY = GetY();
	408	Double_t oldZ = GetZ();
	409
	410	Double_t bz = GetBz();
	411
	412	if (!AliExternalTrackParam::PropagateTo(xk,bz)) {
	413	return kFALSE;
	414	}
	415
	416	Double_t x = GetX();
	417	Double_t y = GetY();
	418	Double_t z = GetZ();
	419
	420	if (oldX < xk) {
	421	xrho = -xrho;
	422	if (IsStartedTimeIntegral()) {
	423	Double_t l2 = TMath::Sqrt((x-oldX)*(x-oldX)
	424	+ (y-oldY)*(y-oldY)
	425	+ (z-oldZ)*(z-oldZ));
	426	Double_t crv = AliExternalTrackParam::GetC(bz);
	427	if (TMath::Abs(l2*crv) > 0.0001) {
	428	// Make correction for curvature if neccesary
	429	l2 = 0.5 * TMath::Sqrt((x-oldX)*(x-oldX)
	430	+ (y-oldY)*(y-oldY));
	431	l2 = 2.0 * TMath::ASin(l2 * crv) / crv;
	432	l2 = TMath::Sqrt(l2l2 + (z-oldZ)(z-oldZ));
	433	}
	434	AddTimeStep(l2);
	435	}
	436	}
	437
	438	if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0,xrho,GetMass())) {
	439	return kFALSE;
	440	}
	441
	442	{
	443
	444	// Energy losses
	445	Double_t p2 = (1.0 + GetTgl()GetTgl()) / (GetSigned1Pt()GetSigned1Pt());
	446	Double_t beta2 = p2 / (p2 + GetMass()*GetMass());
	447	if ((beta2 < 1.0e-10) \|\|
	448	((5940.0 * beta2/(1.0 - beta2 + 1.0e-10) - beta2) < 0.0)) {
	449	return kFALSE;
	450	}
	451
	452	Double_t dE = 0.153e-3 / beta2
	453	* (TMath::Log(5940.0 * beta2/(1.0 - beta2 + 1.0e-10)) - beta2)
	454	* xrho;
	455	fBudget[0] += xrho;
	456
	457	/*
	458	// Suspicious part - think about it ?
	459	Double_t kinE = TMath::Sqrt(p2);
	460	if (dE > 0.8kinE) dE = 0.8 kinE; //
	461	if (dE < 0) dE = 0.0; // Not valid region for Bethe bloch
	462	*/
	463
	464	fDE += dE;
	465
466	/*
467	// Suspicious ! I.B.
468	Double_t sigmade = 0.07 * TMath::Sqrt(TMath::Abs(dE)); // Energy loss fluctuation
469	Double_t sigmac2 = sigmadesigmadefCfC(p2+GetMass()GetMass())/(p2p2);
470	fCcc += sigmac2;
471	fCee += fXfX sigmac2;
472	*/
473
474	}
475
476	return kTRUE;
0906e73e	477	}
3b57a3f7	478
87a7fa94	479	//_____________________________________________________________________________
3b57a3f7	480	Int_t AliTRDtrackV1::PropagateToR(Double_t r,Double_t step)
87a7fa94	481	{
87a7fa94	482	//
3b57a3f7	483	// Propagate track to the radial position
3b57a3f7	484	// Rotation always connected to the last track position
87a7fa94	485	//
87a7fa94	486
3b57a3f7	487	Double_t xyz0[3];
	488	Double_t xyz1[3];
	489	Double_t y;
	490	Double_t z;
	491
	492	Double_t radius = TMath::Sqrt(GetX()GetX() + GetY()GetY());
	493	// Direction +-
	494	Double_t dir = (radius > r) ? -1.0 : 1.0;
	495
	496	for (Double_t x = radius+dirstep; dirx < dirr; x += dirstep) {
	497
	498	GetXYZ(xyz0);
	499	Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
	500	Rotate(alpha,kTRUE);
	501	GetXYZ(xyz0);
	502	GetProlongation(x,y,z);
	503	xyz1[0] = x * TMath::Cos(alpha) + y * TMath::Sin(alpha);
	504	xyz1[1] = x * TMath::Sin(alpha) - y * TMath::Cos(alpha);
	505	xyz1[2] = z;
	506	Double_t param[7];
	507	AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
	508	if (param[1] <= 0) {
	509	param[1] = 100000000;
	510	}
	511	PropagateTo(x,param[1],param[0]*param[4]);
	512
	513	}
	514
	515	GetXYZ(xyz0);
	516	Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
	517	Rotate(alpha,kTRUE);
	518	GetXYZ(xyz0);
	519	GetProlongation(r,y,z);
	520	xyz1[0] = r * TMath::Cos(alpha) + y * TMath::Sin(alpha);
	521	xyz1[1] = r * TMath::Sin(alpha) - y * TMath::Cos(alpha);
	522	xyz1[2] = z;
	523	Double_t param[7];
	524	AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
	525
	526	if (param[1] <= 0) {
	527	param[1] = 100000000;
87a7fa94	528	}
3b57a3f7	529	PropagateTo(r,param[1],param[0]*param[4]);
	530
	531	return 0;
	532
87a7fa94	533	}
87a7fa94	534
3b57a3f7	535	//_____________________________________________________________________________
	536	Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
	537	{
	538	//
	539	// Rotates track parameters in R*phi plane
	540	// if absolute rotation alpha is in global system
	541	// otherwise alpha rotation is relative to the current rotation angle
	542	//
	543
	544	if (absolute) alpha -= GetAlpha();
	545	//else fNRotate++;
	546
	547	return AliExternalTrackParam::Rotate(GetAlpha()+alpha);
	548	}
87a7fa94	549
eb38ed55	550	//___________________________________________________________
	551	void AliTRDtrackV1::SetNumberOfClusters()
	552	{
	553	// Calculate the number of clusters attached to this track
	554
3b57a3f7	555	Int_t ncls = 0;
	556	for(int ip=0; ip<kNplane; ip++){
	557	if(fTracklet[ip] && fTrackletIndex[ip] != 0xffff) ncls += fTracklet[ip]->GetN();
	558	}
	559	AliKalmanTrack::SetNumberOfClusters(ncls);
eb38ed55	560	}
	561
	562
0906e73e	563	//_______________________________________________________________
3b57a3f7	564	void AliTRDtrackV1::SetOwner()
0906e73e	565	{
	566	//
	567	// Toggle ownership of tracklets
	568	//
	569
3b57a3f7	570	if(TestBit(1)) return;
	571	for (Int_t ip = 0; ip < kNplane; ip++) {
	572	if(fTrackletIndex[ip] == 0xffff) continue;
	573	fTracklet[ip] = new AliTRDseedV1(*fTracklet[ip]);
	574	fTracklet[ip]->SetOwner();
	575	}
	576	SetBit(1);
0906e73e	577	}
0906e73e	578
d9950a5a	579	//_______________________________________________________________
3b57a3f7	580	void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *trklt, Int_t index)
d9950a5a	581	{
d9950a5a	582	//
0906e73e	583	// Set the tracklets
d9950a5a	584	//
3b57a3f7	585	Int_t plane = trklt->GetPlane();
41702fec	586	if(fTrackletIndex[plane]==0xffff && fTracklet[plane]){
	587	delete fTracklet[plane];
	588	}
3b57a3f7	589	fTracklet[plane] = trklt;
3b57a3f7	590	fTrackletIndex[plane] = index;
d9950a5a	591	}
	592
	593	//_______________________________________________________________
0906e73e	594	Bool_t AliTRDtrackV1::Update(AliTRDseedV1 *trklt, Double_t chisq)
d9950a5a	595	{
d9950a5a	596	//
3b57a3f7	597	// Update track and tracklet parameters
d9950a5a	598	//
3b57a3f7	599
0906e73e	600	Double_t x = trklt->GetX0();
d9950a5a	601	Double_t p[2] = { trklt->GetYat(x)
	602	, trklt->GetZat(x) };
	603	Double_t cov[3];
3b57a3f7	604	trklt->GetCovAt(x, cov);
3b57a3f7	605
3afdab72	606	// insert systematic uncertainties calibration and misalignment
	607	Double_t sys[15];
	608	AliTRDReconstructor::RecoParam()->GetSysCovMatrix(sys);
	609	cov[0] += (sys[0]*sys[0]);
	610	cov[2] += (sys[1]*sys[1]);
	611
d9950a5a	612	if(!AliExternalTrackParam::Update(p, cov)) return kFALSE;
3b57a3f7	613
	614	AliTRDcluster *c = 0x0;
	615	Int_t ic = 0; while(!(c = trklt->GetClusters(ic))) ic++;
	616	AliTracker::FillResiduals(this, p, cov, c->GetVolumeId());
	617
	618
d9950a5a	619	// Register info to track
3b57a3f7	620	SetNumberOfClusters();
d9950a5a	621	SetChi2(GetChi2() + chisq);
3b57a3f7	622
	623	// update tracklet
	624	trklt->SetMomentum(GetP());
	625	trklt->SetSnp(GetSnp());
	626	trklt->SetTgl(GetTgl());
	627	return kTRUE;
d9950a5a	628	}
	629
	630	//_______________________________________________________________
0906e73e	631	void AliTRDtrackV1::UpdateESDtrack(AliESDtrack *track)
d9950a5a	632	{
d9950a5a	633	//
6984f7c1	634	// Update the TRD PID information in the ESD track
d9950a5a	635	//
6984f7c1	636
6984f7c1	637	track->SetNumberOfTRDslices(kNslice);
3b57a3f7	638
6984f7c1	639	for (Int_t ip = 0; ip < kNplane; ip++) {
3b57a3f7	640	if(fTrackletIndex[ip] == 0xffff) continue;
	641	fTracklet[ip]->CookdEdx(kNslice);
	642	Float_t *dedx = fTracklet[ip]->GetdEdx();
	643	for (Int_t js = 0; js < kNslice; js++) track->SetTRDslice(dedx[js], ip, js);
6984f7c1	644	}
0906e73e	645
6984f7c1	646	// copy PID to ESD
	647	track->SetTRDpid(fPID);
	648	track->SetTRDpidQuality(fPIDquality);
d9950a5a	649	}