[u/mrichter/AliRoot.git] / HLT / global / AliHLTGlobalTrackMerger.cxx

//$Id$

/**************************************************************************
 * This file is property of and copyright by the ALICE HLT Project        * 
 * ALICE Experiment at CERN, All rights reserved.                         *
 *                                                                        *
 * Primary Authors: Jacek Otwinowski (Jacek.Otwinowski@gsi.de)            *
 *                  for The ALICE HLT Project.                            *
 *                                                                        *
 * 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.                  *
 **************************************************************************/

/** @file   AliHLTGlobalTrackMerger.cxx
    @author Jacek Otwinowski
    @date   
    @brief  The HLT global merger base class
*/

//#include "AliTPCReconstructor.h"

#include "AliESDEvent.h"
#include "AliESDVertex.h"
#include "AliTracker.h"
#include "TTreeStream.h"

#include <TClonesArray.h>

#include "AliHLTGlobalTrackMerger.h"

#if __GNUC__>= 3
using namespace std;
#endif

ClassImp(AliHLTGlobalTrackMerger)

AliHLTGlobalTrackMerger::AliHLTGlobalTrackMerger()
  :
  fMaxY(0.0),
  fMaxZ(0.0),
  fMaxSnp(0.0),
  fMaxTgl(0.0),
  fMaxSigned1Pt(0.0),
  fVertex(0),
  fDebugStreamer(0)
{
  //Default constructor

  // standard vertex settings at the moment
  // V(0.,0.,0.), sigmaVx=sigmaVy=5.e-3 [cm], sigmaVz=5.3 [cm]    
  fVertex = new AliESDVertex;

  // if (AliTPCReconstructor::StreamLevel()>0) {
  //   fDebugStreamer = new TTreeSRedirector("debugGlobalMerger.root");
  // }

}

//_____________________________________________________________________________
AliHLTGlobalTrackMerger::~AliHLTGlobalTrackMerger()
{
  //Destructor
  if(fVertex) delete fVertex; fVertex =0;
  if(fDebugStreamer) delete fDebugStreamer; fDebugStreamer =0;
}

//_____________________________________________________________________________
Bool_t AliHLTGlobalTrackMerger::Merge(AliESDEvent* esdEvent)
{
  // merge TPC and TRD tracks
  // 1. propagate TPC track to the radius between TPC and TRD
  // 2. propagate TRD track to the same radius between TPC and TRD
  // 3. matches TPC and TRD tracks at the radius
  // 4. propagate matched TRD track to the merging radius (first measured TPC point - x coordinate)
  // 5. merge TPC and TRD track parameters at the merging radius 
  // 6. create AliESDtrack from merged tracks
  // 7. add AliESDtrack to AliESDEvent

  if(!esdEvent) return kFALSE;

  const Double_t kMaxStep     = 10.0;    // [cm] track propagation step
  const Double_t kMatchRadius = 285.0;   // [cm] matching at radius between TPC and TRD
  Double_t kMergeRadius = 0.0;
  Bool_t isOk = kFALSE;
  Bool_t isMatched = kFALSE;
  AliESDtrack *track=0;
  AliExternalTrackParam *extTPCTrack = 0;

  Int_t nTracks = esdEvent->GetNumberOfTracks(); 
  HLTWarning("nTracks %d",nTracks);

  Int_t nTracksTPC =0;
  for(Int_t iTrack = 0; iTrack<nTracks; ++iTrack) 
  {
    track = esdEvent->GetTrack(iTrack); 
    if(!track) continue;

    // TPC tracks
    if((track->GetStatus()&AliESDtrack::kTPCin)==0) continue;
    AliESDtrack *tpcTrack = track;
    nTracksTPC++;

    // create external tpc track param (needed to propagate to matching radius) 
    if ((extTPCTrack = new AliExternalTrackParam(*tpcTrack)) == 0) continue; 

    kMergeRadius = tpcTrack->GetTPCPoints(0); // [cm] merging at first measured TPC point

    HLTInfo("-------------------------------------------------------------------------------------");
    //HLTInfo("-----tpc track before matching: alpha %f, x %f, y, %f, z %f, snp %f, tgl %f, 1pt %f",tpcTrack->GetAlpha(),tpcTrack->GetX(),tpcTrack->GetY(),tpcTrack->GetZ(),tpcTrack->GetSnp(),tpcTrack->GetTgl(),tpcTrack->GetSigned1Pt());
    HLTInfo("-----ext tpc track before matching: alpha %f, x %f, y, %f, z %f, snp %f, tgl %f, 1pt %f",extTPCTrack->GetAlpha(),extTPCTrack->GetX(),extTPCTrack->GetY(),extTPCTrack->GetZ(),extTPCTrack->GetSnp(),extTPCTrack->GetTgl(),extTPCTrack->GetSigned1Pt());

    // propagate tracks to the matching radius 
    //isOk = AliTracker::PropagateTrackTo(tpcTrack,kMatchRadius,tpcTrack->GetMass(),kMaxStep,kFALSE);
    isOk = AliTracker::PropagateTrackTo(extTPCTrack,kMatchRadius,tpcTrack->GetMass(),kMaxStep,kFALSE);
    if(!isOk) continue;

    HLTInfo("-----ext tpc track at matching radius: alpha %f, x %f, y, %f, z %f, snp %f, tgl %f, 1pt %f",extTPCTrack->GetAlpha(),extTPCTrack->GetX(),extTPCTrack->GetY(),extTPCTrack->GetZ(),extTPCTrack->GetSnp(),extTPCTrack->GetTgl(),extTPCTrack->GetSigned1Pt());

    Int_t nTracksTRD =0;
    for(Int_t jTrack = 0; jTrack<nTracks; ++jTrack) 
    {
      track = esdEvent->GetTrack(jTrack); 
      if(!track) continue;

      // TRD tracks
      if((track->GetStatus()&AliESDtrack::kTRDin)==0) continue;
      AliESDtrack *trdTrack = track;
      nTracksTRD++;

      HLTInfo("-----trd track before matching: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",trdTrack->GetAlpha(),trdTrack->GetX(),trdTrack->GetY(),trdTrack->GetZ(),trdTrack->GetSnp(),trdTrack->GetTgl(),trdTrack->GetSigned1Pt());

      isOk = AliTracker::PropagateTrackTo(trdTrack,kMatchRadius,trdTrack->GetMass(),kMaxStep,kFALSE);
      if(!isOk) continue;

      HLTInfo("-----trd track at matching radius: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",trdTrack->GetAlpha(),trdTrack->GetX(),trdTrack->GetY(),trdTrack->GetZ(),trdTrack->GetSnp(),trdTrack->GetTgl(),trdTrack->GetSigned1Pt());

      // match TPC and TRD tracks
      //isMatched = MatchTracks(tpcTrack,trdTrack);
      isMatched = MatchTracks(extTPCTrack,trdTrack);
      if(!isMatched) continue;

      //HLTInfo("-----tpc track after matching: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",tpcTrack->GetAlpha(),tpcTrack->GetX(),tpcTrack->GetY(),tpcTrack->GetZ(),tpcTrack->GetSnp(),tpcTrack->GetTgl(),tpcTrack->GetSigned1Pt());
      HLTInfo("-----ext tpc track after matching: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",extTPCTrack->GetAlpha(),extTPCTrack->GetX(),extTPCTrack->GetY(),extTPCTrack->GetZ(),extTPCTrack->GetSnp(),extTPCTrack->GetTgl(),extTPCTrack->GetSigned1Pt());
      HLTInfo("-----trd track after matching: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",trdTrack->GetAlpha(),trdTrack->GetX(),trdTrack->GetY(),trdTrack->GetZ(),trdTrack->GetSnp(),trdTrack->GetTgl(),trdTrack->GetSigned1Pt());

      // propagate TRD tracks to the merging radius 
      //isOk = AliTracker::PropagateTrackTo(tpcTrack,kMergeRadius,tpcTrack->GetMass(),kMaxStep,kFALSE);
      //if(!isOk) continue;
      isOk = AliTracker::PropagateTrackTo(trdTrack,kMergeRadius,trdTrack->GetMass(),kMaxStep,kFALSE);
      if(!isOk) continue;

      HLTInfo("-----tpc before merging: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",tpcTrack->GetAlpha(),tpcTrack->GetX(),tpcTrack->GetY(),tpcTrack->GetZ(),tpcTrack->GetSnp(),tpcTrack->GetTgl(),tpcTrack->GetSigned1Pt());
      HLTInfo("-----trd before merging: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",trdTrack->GetAlpha(),trdTrack->GetX(),trdTrack->GetY(),trdTrack->GetZ(),trdTrack->GetSnp(),trdTrack->GetTgl(),trdTrack->GetSigned1Pt());

      // merge TPC and TRD tracks
      // create AliESDtrack and add it to AliESDevent
      Bool_t isMerged = MergeTracks(tpcTrack,trdTrack,esdEvent);
      if(!isMerged) 
        HLTInfo("No merged tracks");
    }
    HLTInfo("nTracksTRD %d",nTracksTRD);

    // delete external TPC track
    if(extTPCTrack) delete extTPCTrack; extTPCTrack=0;
  }
  HLTInfo("nTracksTPC %d",nTracksTPC);

return kTRUE;
}

//_____________________________________________________________________________
Bool_t AliHLTGlobalTrackMerger::MergeTracks(AliESDtrack *tpcTrack, AliESDtrack* trdTrack, AliESDEvent *esdEvent)
{
  // merge TPC and TRD track parameters
  // create new AliESDtrack with TPC+TRD merged track parameters
  // add AliESDtrack to AliESDEvent

  if(!tpcTrack) return kFALSE;
  if(!trdTrack) return kFALSE;

  Double_t trackParam[5], trackCovar[15]; 
  Double_t trackChi2;
  Int_t trackNDF;

  // calculate merged track parameters
  Bool_t isNotOK = SmoothTracks(tpcTrack->GetParameter(), tpcTrack->GetCovariance(), tpcTrack->GetTPCchi2(), 5,
                                trdTrack->GetParameter(), trdTrack->GetCovariance(), trdTrack->GetTRDchi2(), 5,
                                trackParam, trackCovar, trackChi2, trackNDF,5);

  if(isNotOK) 
      return kFALSE;

  //
  // create AliESDtrack
  // merged TPC+TRD information
  // 

  AliESDtrack track;
  //track.UpdateTrackParams(tpcTrack, AliESDtrack::kTPCrefit);
  track.SetStatus(AliESDtrack::kGlobalMerge);
  track.SetLabel(tpcTrack->GetLabel());
  track.Set(tpcTrack->GetX(),tpcTrack->GetAlpha(),trackParam,trackCovar);
  track.SetGlobalChi2(trackChi2);

  //track.SetTPCLabel(tpcTrack->GetLabel());
  Double32_t tpcPID[AliPID::kSPECIES];
  tpcTrack->GetTPCpid(tpcPID);
  track.SetTPCpid(tpcPID);
  //fTPCncls=t->GetNumberOfClusters();  // no cluster on HLT
  //fTPCchi2=t->GetChi2();

  //track.SetTRDLabel(trdTrack->GetLabel());
  Double32_t trdPID[AliPID::kSPECIES];
  trdTrack->GetTRDpid(trdPID);
  track.SetTRDpid(trdPID);
  //fTRDchi2  = t->GetChi2();
  //fTRDncls  = t->GetNumberOfClusters();
  //for (Int_t i=0;i<6;i++) index[i]=t->GetTrackletIndex(i);

  // add track to AliESDEvent
  esdEvent->AddTrack(&track);

return kTRUE;
}

//_____________________________________________________________________________
void AliHLTGlobalTrackMerger::SetParameter(Double_t maxy, Double_t maxz, Double_t maxsnp, Double_t maxtgl, Double_t signed1Pt)
{ 
  //set parameters for merger
  fMaxY = maxy;
  fMaxZ = maxz;
  fMaxSnp = maxsnp;
  fMaxTgl = maxtgl;
  fMaxSigned1Pt = signed1Pt;
}

//_____________________________________________________________________________
Bool_t AliHLTGlobalTrackMerger::MatchTracks(AliExternalTrackParam *trackTPC, AliESDtrack *trackTRD)
{ 
  // match TPC and TRD tracks 
  // return kTRUE in case of matching
 
  if(!trackTPC) return kFALSE;
  if(!trackTRD) return kFALSE;

  Double_t x_tpc=trackTPC->GetX();
  Double_t y_tpc=trackTPC->GetY();
  Double_t z_tpc=trackTPC->GetZ();
  Double_t snp_tpc=trackTPC->GetSnp();
  Double_t tgl_tpc=trackTPC->GetTgl();
  Double_t signed1Pt_tpc=trackTPC->GetSigned1Pt();

  Double_t x_trd=trackTRD->GetX();
  Double_t y_trd=trackTRD->GetY();
  Double_t z_trd=trackTRD->GetZ();
  Double_t snp_trd=trackTRD->GetSnp();
  Double_t tgl_trd=trackTRD->GetTgl();
  Double_t signed1Pt_trd=trackTRD->GetSigned1Pt();

  // debug stream
  // if (AliTPCReconstructor::StreamLevel()>0) {
  // //TTreeSRedirector &cstream = *fDebugStreamer;
  // *fDebugStreamer<<"match"<<
  // "x_tpc="<<x_tpc<<
  // "y_tpc="<<y_tpc<<
  // "z_tpc="<<z_tpc<<
  // "snp_tpc="<<snp_tpc<<
  // "tgl_tpc="<<tgl_tpc<<
  // "signed1Pt_tpc="<<signed1Pt_tpc<<
  // "x_trd="<<x_trd<<
  // "y_trd="<<y_trd<<
  // "z_trd="<<z_trd<<
  // "snp_trd="<<snp_trd<<
  // "tgl_trd="<<tgl_trd<<
  // "signed1Pt_trd="<<signed1Pt_trd<<
  // "\n";
  // }

  if (TMath::Abs(x_tpc-x_trd) > 0) {/* get rid of warning*/;}
  if (TMath::Abs(y_tpc-y_trd) > fMaxY) return kFALSE;
  if (TMath::Abs(z_tpc-z_trd) > fMaxZ) return kFALSE;
  if (TMath::Abs(snp_tpc-snp_trd) > fMaxSnp) return kFALSE;
  if (TMath::Abs(tgl_tpc-tgl_trd) > fMaxTgl) return kFALSE;
  if (TMath::Abs(signed1Pt_tpc-signed1Pt_trd) > fMaxSigned1Pt) return kFALSE;

return kTRUE;
}

//_____________________________________________________________________________
Bool_t AliHLTGlobalTrackMerger::SmoothTracks( const Double_t T1[], const Double_t C1[], Double_t Chi21, Int_t NDF1,
				    const  Double_t T2[], const Double_t C2[], Double_t Chi22, Int_t NDF2,
				     Double_t T [], Double_t C [], Double_t &Chi2, Int_t &NDF,
				     Int_t N  )
{
  //* Smooth two tracks with parameter vectors of size N
  //*
  //* Input:
  //*
  //* T1[N], T2[N] - tracks
  //* C1[N*(N+1)/2], C2[N*(N+1)/2] - covariance matrices in low-diagonal form:
  //* C = { c00, 
  //*       c10, c11, 
  //*       c20, c21, c22, 
  //*       ...             };
  //* Chi2{1,2}, NDF{1,2} - \Chi^2 and "Number of Degrees of Freedom" values for both tracks
  //* Output: 
  //*
  //* T[N], C[N] ( can be aqual to {T1,C1}, or {T2,C2} )
  //* Chi2, NDF
  //*
  //* returns error flag (0 means OK, 1 not OK )
    
  Int_t M = N*(N+1)/2;
  
  Double_t A[M];
  Double_t K[N*N];
  
  for(Int_t k=0; k<M; k++) A[k] = C1[k] + C2[k]; 
  Bool_t err = InvertS(A,N);
  if( err ) return 1;

  Chi2 = Chi21 + Chi22;
  NDF = NDF1 + NDF2;
  
  MultSSQ( C1, A, K, N);	
  Double_t r[N];
  for( Int_t k=0; k<N;k++) r[k] = T1[k] - T2[k]; 
  for( Int_t k=0; k<N;k++ )
    for( Int_t l=0;l<N;l++) T[k] = T1[k] - K[k*N+l]*r[l];

  for( Int_t ind=0,i=0; i<N; i++ ){
    for( Int_t j=0; j<i; j++ ) Chi2+= 2*r[i]*r[j]*A[ind++];
    Chi2+= r[i]*r[i]*A[ind++];
  }
  NDF+=N;

  for( Int_t l=0; l<N; l++ ) K[ (N+1)*l ] -= 1;
  
  for( Int_t ind = 0, l=0; l<N; ++l ){
    for( Int_t j=0; j<=l; ++j, ind++ ){
      A[ind] = 0;
      for( Int_t k=0; k<N; ++k ) A[ind] -= K[l*N+k] * C1[IndexS(j,k)];
    }
  }
  for( Int_t l=0; l<N; l++ ) C[l] = A[l];
  return 0;
}

//_____________________________________________________________________________
void AliHLTGlobalTrackMerger::MultSSQ( const Double_t *A, const Double_t *B, Double_t *C, Int_t N )
{
  for( Int_t ind=0, i=0; i<N; ++i ){
    for( Int_t j=0; j<N; ++j, ++ind ){
      C[ind] = 0;
      for( Int_t k=0; k<N; ++k ) C[ind] += A[IndexS(i,k)] * B[IndexS(k,j)];
    }
  }
}

//_____________________________________________________________________________
Bool_t AliHLTGlobalTrackMerger::InvertS( Double_t A[], Int_t N )
{
  //* input: simmetric > 0 NxN matrix A = {a11,a21,a22,a31..a33,..}  
  //* output: inverse A, in case of problems fill zero and return 1
  //*  
  //* A->low triangular Anew : A = Anew x Anew^T
  //* method:
  //* for(j=1,N) for(i=j,N) Aij=(Aii-sum_{k=1}^{j-1}Aik*Ajk )/Ajj
  //*   

  Bool_t ret = 0;
  
  const Double_t ZERO = 1.E-20;
    
  {
    Double_t *j1 = A, *jj = A;
    for( Int_t j=1; j<=N; j1+=j++, jj+=j ){
      Double_t *ik = j1, x = 0;
      while( ik!=jj ){
	x -= (*ik) * (*ik);
	ik++;
      }
      x += *ik;
      if( x > ZERO ){
	x = sqrt(x);
	*ik = x;
	ik++;
	x = 1 / x;
	for( Int_t step=1; step<=N-j; ik+=++step ){ // ik==Ai1
	  Double_t sum = 0;
	  for( Double_t *jk=j1; jk!=jj; sum += (*(jk++)) * (*(ik++)) ) {}
	  *ik = (*ik - sum) * x; // ik == Aij
	}
      }else{
	Double_t *ji=jj;
	for( Int_t i=j; i<N; i++ ) *(ji+=i) = 0.;
	ret = 1;
      }   
    }
  }
  
  //* A -> Ainv
  //* method : 
  //* for(i=1,N){ 
  //*   Aii = 1/Aii; 
  //*   for(j=1,i-1) Aij=-(sum_{k=j}^{i-1} Aik * Akj) / Aii ;
  //* }
  
  {
    Double_t *ii=A,*ij=A;
    for( Int_t i = 1; i<=N; ij=ii+1, ii+=++i ){
      if( *ii > ZERO ){
	Double_t x = -(*ii = 1./ *ii);
	{ 
	  Double_t *jj = A;
	  for( Int_t j=1; j<i; jj+=++j, ij++ ){
	    Double_t *ik = ij, *kj = jj, sum = 0.;
	    for( Int_t k=j; ik!=ii; kj+=k++, ik++ ){
	      sum += *ik * *kj;
	    }
	    *kj = sum * x;
	  }
	}
      }else{      
	for( Double_t *ik = ij; ik!=ii+1; ik++ ){
	  *ik = 0.;
	}
	ret = 1;
      }
    }
  }
  
  //* A -> A^T x A
  //* method: 
  //* Aij = sum_{k=i}^N Aki * Akj
  
  {
    Double_t *ii=A, *ij=A;
    for( Int_t i=1; i<=N; ii+=++i ){
      do{ 
	Double_t *ki = ii, *kj = ij, sum = 0.;
	for( Int_t k=i; k<=N; ki+=k, kj+=k++ ) sum += (*ki) * (*kj);
	*ij = sum;
      }while( (ij++)!=ii );
    }    
  }
  return ret;    
}

//_____________________________________________________________________________
void  AliHLTGlobalTrackMerger::PropagateTracksToDCA(AliESDEvent *esdEvent)
{
  // try to propagate all tracks to DCA to primary vertex
  if(!esdEvent) return;

  const Double_t kBz = esdEvent->GetMagneticField();
  const Double_t kSmallRadius  = 2.8; // [cm] something less than the beam pipe radius
  const Double_t kMaxStep  = 10.0;    // [cm] track propagation step
  Bool_t isOK = kFALSE;

  Int_t nTracks = esdEvent->GetNumberOfTracks(); 
  for(Int_t iTrack = 0; iTrack<nTracks; ++iTrack) {
    AliESDtrack *track = esdEvent->GetTrack(iTrack); 
    if(!track) continue;

    // propagate to small radius (material budget included)
    isOK = AliTracker::PropagateTrackTo(track,kSmallRadius,track->GetMass(),kMaxStep,kFALSE);

    // relate tracks to DCA to primary vertex
    if(isOK) 
    {
      track->RelateToVertex(fVertex, kBz, kVeryBig);
      HLTInfo("1-------: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",track->GetAlpha(),track->GetX(),track->GetY(),track->GetZ(),track->GetSnp(),track->GetTgl(),track->GetSigned1Pt());
    }

    //
    // the same procedure must be repeated for TPCinner (TPC only) tracks
    //
    AliExternalTrackParam *tpcTrack = (AliExternalTrackParam *)track->GetTPCInnerParam();
    if(!tpcTrack) continue;

    // propagate tpcTracks to small radius (material budget included)
    isOK = AliTracker::PropagateTrackTo(tpcTrack,kSmallRadius,track->GetMass(),kMaxStep,kFALSE);

    // relate tracks to DCA to primary vertex
    if(isOK) 
    {
      Double_t par[2], cov[3];
      tpcTrack->PropagateToDCA(fVertex, kBz, kVeryBig,par,cov);
      HLTInfo("2-------: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",tpcTrack->GetAlpha(),tpcTrack->GetX(),tpcTrack->GetY(),tpcTrack->GetZ(),tpcTrack->GetSnp(),tpcTrack->GetTgl(),tpcTrack->GetSigned1Pt());
    }
  }
}
Commit	Line	Data
ec6160d5	1	//$Id$
	2
	3	/**************************************************************************
	4	* This file is property of and copyright by the ALICE HLT Project *
	5	* ALICE Experiment at CERN, All rights reserved. *
	6	* *
	7	* Primary Authors: Jacek Otwinowski (Jacek.Otwinowski@gsi.de) *
	8	* for The ALICE HLT Project. *
	9	* *
	10	* Permission to use, copy, modify and distribute this software and its *
	11	* documentation strictly for non-commercial purposes is hereby granted *
	12	* without fee, provided that the above copyright notice appears in all *
	13	* copies and that both the copyright notice and this permission notice *
	14	* appear in the supporting documentation. The authors make no claims *
	15	* about the suitability of this software for any purpose. It is *
	16	* provided "as is" without express or implied warranty. *
	17	**************************************************************************/
	18
	19	/** @file AliHLTGlobalTrackMerger.cxx
	20	@author Jacek Otwinowski
	21	@date
	22	@brief The HLT global merger base class
	23	*/
	24
18ada816	25	//#include "AliTPCReconstructor.h"
ec6160d5	26
ec6160d5	27	#include "AliESDEvent.h"
	28	#include "AliESDVertex.h"
	29	#include "AliTracker.h"
a9f060e5	30	#include "TTreeStream.h"
ec6160d5	31
	32	#include <TClonesArray.h>
	33
	34	#include "AliHLTGlobalTrackMerger.h"
	35
	36	#if __GNUC__>= 3
	37	using namespace std;
	38	#endif
	39
	40	ClassImp(AliHLTGlobalTrackMerger)
	41
	42	AliHLTGlobalTrackMerger::AliHLTGlobalTrackMerger()
	43	:
	44	fMaxY(0.0),
	45	fMaxZ(0.0),
	46	fMaxSnp(0.0),
	47	fMaxTgl(0.0),
	48	fMaxSigned1Pt(0.0),
a9f060e5	49	fVertex(0),
a9f060e5	50	fDebugStreamer(0)
ec6160d5	51	{
	52	//Default constructor
	53
	54	// standard vertex settings at the moment
	55	// V(0.,0.,0.), sigmaVx=sigmaVy=5.e-3 [cm], sigmaVz=5.3 [cm]
	56	fVertex = new AliESDVertex;
a9f060e5	57
18ada816	58	// if (AliTPCReconstructor::StreamLevel()>0) {
	59	// fDebugStreamer = new TTreeSRedirector("debugGlobalMerger.root");
	60	// }
a9f060e5	61
ec6160d5	62	}
	63
	64	//_____________________________________________________________________________
	65	AliHLTGlobalTrackMerger::~AliHLTGlobalTrackMerger()
	66	{
	67	//Destructor
	68	if(fVertex) delete fVertex; fVertex =0;
a9f060e5	69	if(fDebugStreamer) delete fDebugStreamer; fDebugStreamer =0;
ec6160d5	70	}
ec6160d5	71
ec6160d5	72	//_____________________________________________________________________________
	73	Bool_t AliHLTGlobalTrackMerger::Merge(AliESDEvent* esdEvent)
	74	{
	75	// merge TPC and TRD tracks
	76	// 1. propagate TPC track to the radius between TPC and TRD
	77	// 2. propagate TRD track to the same radius between TPC and TRD
	78	// 3. matches TPC and TRD tracks at the radius
4b6d0cc6	79	// 4. propagate matched TRD track to the merging radius (first measured TPC point - x coordinate)
ec6160d5	80	// 5. merge TPC and TRD track parameters at the merging radius
	81	// 6. create AliESDtrack from merged tracks
	82	// 7. add AliESDtrack to AliESDEvent
	83
	84	if(!esdEvent) return kFALSE;
	85
	86	const Double_t kMaxStep = 10.0; // [cm] track propagation step
	87	const Double_t kMatchRadius = 285.0; // [cm] matching at radius between TPC and TRD
	88	Double_t kMergeRadius = 0.0;
	89	Bool_t isOk = kFALSE;
	90	Bool_t isMatched = kFALSE;
a9f060e5	91	AliESDtrack *track=0;
4b6d0cc6	92	AliExternalTrackParam *extTPCTrack = 0;
ec6160d5	93
ec6160d5	94	Int_t nTracks = esdEvent->GetNumberOfTracks();
ec6160d5	95	HLTWarning("nTracks %d",nTracks);
ec6160d5	96
a9f060e5	97	Int_t nTracksTPC =0;
ec6160d5	98	for(Int_t iTrack = 0; iTrack<nTracks; ++iTrack)
ec6160d5	99	{
a9f060e5	100	track = esdEvent->GetTrack(iTrack);
ec6160d5	101	if(!track) continue;
	102
	103	// TPC tracks
	104	if((track->GetStatus()&AliESDtrack::kTPCin)==0) continue;
	105	AliESDtrack *tpcTrack = track;
a9f060e5	106	nTracksTPC++;
ec6160d5	107
4b6d0cc6	108	// create external tpc track param (needed to propagate to matching radius)
	109	if ((extTPCTrack = new AliExternalTrackParam(*tpcTrack)) == 0) continue;
	110
a9f060e5	111	kMergeRadius = tpcTrack->GetTPCPoints(0); // [cm] merging at first measured TPC point
ec6160d5	112
a9f060e5	113	HLTInfo("-------------------------------------------------------------------------------------");
4b6d0cc6	114	//HLTInfo("-----tpc track before matching: alpha %f, x %f, y, %f, z %f, snp %f, tgl %f, 1pt %f",tpcTrack->GetAlpha(),tpcTrack->GetX(),tpcTrack->GetY(),tpcTrack->GetZ(),tpcTrack->GetSnp(),tpcTrack->GetTgl(),tpcTrack->GetSigned1Pt());
4b6d0cc6	115	HLTInfo("-----ext tpc track before matching: alpha %f, x %f, y, %f, z %f, snp %f, tgl %f, 1pt %f",extTPCTrack->GetAlpha(),extTPCTrack->GetX(),extTPCTrack->GetY(),extTPCTrack->GetZ(),extTPCTrack->GetSnp(),extTPCTrack->GetTgl(),extTPCTrack->GetSigned1Pt());
ec6160d5	116
ec6160d5	117	// propagate tracks to the matching radius
4b6d0cc6	118	//isOk = AliTracker::PropagateTrackTo(tpcTrack,kMatchRadius,tpcTrack->GetMass(),kMaxStep,kFALSE);
4b6d0cc6	119	isOk = AliTracker::PropagateTrackTo(extTPCTrack,kMatchRadius,tpcTrack->GetMass(),kMaxStep,kFALSE);
ec6160d5	120	if(!isOk) continue;
ec6160d5	121
4b6d0cc6	122	HLTInfo("-----ext tpc track at matching radius: alpha %f, x %f, y, %f, z %f, snp %f, tgl %f, 1pt %f",extTPCTrack->GetAlpha(),extTPCTrack->GetX(),extTPCTrack->GetY(),extTPCTrack->GetZ(),extTPCTrack->GetSnp(),extTPCTrack->GetTgl(),extTPCTrack->GetSigned1Pt());
ec6160d5	123
a9f060e5	124	Int_t nTracksTRD =0;
ec6160d5	125	for(Int_t jTrack = 0; jTrack<nTracks; ++jTrack)
ec6160d5	126	{
a9f060e5	127	track = esdEvent->GetTrack(jTrack);
ec6160d5	128	if(!track) continue;
	129
	130	// TRD tracks
	131	if((track->GetStatus()&AliESDtrack::kTRDin)==0) continue;
	132	AliESDtrack *trdTrack = track;
a9f060e5	133	nTracksTRD++;
a9f060e5	134
4b6d0cc6	135	HLTInfo("-----trd track before matching: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",trdTrack->GetAlpha(),trdTrack->GetX(),trdTrack->GetY(),trdTrack->GetZ(),trdTrack->GetSnp(),trdTrack->GetTgl(),trdTrack->GetSigned1Pt());
ec6160d5	136
	137	isOk = AliTracker::PropagateTrackTo(trdTrack,kMatchRadius,trdTrack->GetMass(),kMaxStep,kFALSE);
	138	if(!isOk) continue;
	139
4b6d0cc6	140	HLTInfo("-----trd track at matching radius: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",trdTrack->GetAlpha(),trdTrack->GetX(),trdTrack->GetY(),trdTrack->GetZ(),trdTrack->GetSnp(),trdTrack->GetTgl(),trdTrack->GetSigned1Pt());
ec6160d5	141
ec6160d5	142	// match TPC and TRD tracks
4b6d0cc6	143	//isMatched = MatchTracks(tpcTrack,trdTrack);
4b6d0cc6	144	isMatched = MatchTracks(extTPCTrack,trdTrack);
ec6160d5	145	if(!isMatched) continue;
ec6160d5	146
4b6d0cc6	147	//HLTInfo("-----tpc track after matching: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",tpcTrack->GetAlpha(),tpcTrack->GetX(),tpcTrack->GetY(),tpcTrack->GetZ(),tpcTrack->GetSnp(),tpcTrack->GetTgl(),tpcTrack->GetSigned1Pt());
	148	HLTInfo("-----ext tpc track after matching: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",extTPCTrack->GetAlpha(),extTPCTrack->GetX(),extTPCTrack->GetY(),extTPCTrack->GetZ(),extTPCTrack->GetSnp(),extTPCTrack->GetTgl(),extTPCTrack->GetSigned1Pt());
	149	HLTInfo("-----trd track after matching: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",trdTrack->GetAlpha(),trdTrack->GetX(),trdTrack->GetY(),trdTrack->GetZ(),trdTrack->GetSnp(),trdTrack->GetTgl(),trdTrack->GetSigned1Pt());
ec6160d5	150
4b6d0cc6	151	// propagate TRD tracks to the merging radius
	152	//isOk = AliTracker::PropagateTrackTo(tpcTrack,kMergeRadius,tpcTrack->GetMass(),kMaxStep,kFALSE);
	153	//if(!isOk) continue;
ec6160d5	154	isOk = AliTracker::PropagateTrackTo(trdTrack,kMergeRadius,trdTrack->GetMass(),kMaxStep,kFALSE);
	155	if(!isOk) continue;
	156
4b6d0cc6	157	HLTInfo("-----tpc before merging: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",tpcTrack->GetAlpha(),tpcTrack->GetX(),tpcTrack->GetY(),tpcTrack->GetZ(),tpcTrack->GetSnp(),tpcTrack->GetTgl(),tpcTrack->GetSigned1Pt());
4b6d0cc6	158	HLTInfo("-----trd before merging: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",trdTrack->GetAlpha(),trdTrack->GetX(),trdTrack->GetY(),trdTrack->GetZ(),trdTrack->GetSnp(),trdTrack->GetTgl(),trdTrack->GetSigned1Pt());
ec6160d5	159
	160	// merge TPC and TRD tracks
	161	// create AliESDtrack and add it to AliESDevent
	162	Bool_t isMerged = MergeTracks(tpcTrack,trdTrack,esdEvent);
a9f060e5	163	if(!isMerged)
a9f060e5	164	HLTInfo("No merged tracks");
ec6160d5	165	}
a9f060e5	166	HLTInfo("nTracksTRD %d",nTracksTRD);
4b6d0cc6	167
	168	// delete external TPC track
	169	if(extTPCTrack) delete extTPCTrack; extTPCTrack=0;
ec6160d5	170	}
a9f060e5	171	HLTInfo("nTracksTPC %d",nTracksTPC);
ec6160d5	172
	173	return kTRUE;
	174	}
	175
	176	//_____________________________________________________________________________
	177	Bool_t AliHLTGlobalTrackMerger::MergeTracks(AliESDtrack tpcTrack, AliESDtrack trdTrack, AliESDEvent *esdEvent)
	178	{
	179	// merge TPC and TRD track parameters
	180	// create new AliESDtrack with TPC+TRD merged track parameters
	181	// add AliESDtrack to AliESDEvent
	182
	183	if(!tpcTrack) return kFALSE;
	184	if(!trdTrack) return kFALSE;
	185
ec6160d5	186	Double_t trackParam[5], trackCovar[15];
	187	Double_t trackChi2;
	188	Int_t trackNDF;
	189
	190	// calculate merged track parameters
	191	Bool_t isNotOK = SmoothTracks(tpcTrack->GetParameter(), tpcTrack->GetCovariance(), tpcTrack->GetTPCchi2(), 5,
	192	trdTrack->GetParameter(), trdTrack->GetCovariance(), trdTrack->GetTRDchi2(), 5,
	193	trackParam, trackCovar, trackChi2, trackNDF,5);
	194
	195	if(isNotOK)
	196	return kFALSE;
	197
	198	//
	199	// create AliESDtrack
	200	// merged TPC+TRD information
	201	//
	202
	203	AliESDtrack track;
	204	//track.UpdateTrackParams(tpcTrack, AliESDtrack::kTPCrefit);
	205	track.SetStatus(AliESDtrack::kGlobalMerge);
	206	track.SetLabel(tpcTrack->GetLabel());
	207	track.Set(tpcTrack->GetX(),tpcTrack->GetAlpha(),trackParam,trackCovar);
	208	track.SetGlobalChi2(trackChi2);
	209
	210	//track.SetTPCLabel(tpcTrack->GetLabel());
	211	Double32_t tpcPID[AliPID::kSPECIES];
	212	tpcTrack->GetTPCpid(tpcPID);
	213	track.SetTPCpid(tpcPID);
	214	//fTPCncls=t->GetNumberOfClusters(); // no cluster on HLT
	215	//fTPCchi2=t->GetChi2();
	216
	217	//track.SetTRDLabel(trdTrack->GetLabel());
	218	Double32_t trdPID[AliPID::kSPECIES];
	219	trdTrack->GetTRDpid(trdPID);
	220	track.SetTRDpid(trdPID);
	221	//fTRDchi2 = t->GetChi2();
	222	//fTRDncls = t->GetNumberOfClusters();
	223	//for (Int_t i=0;i<6;i++) index[i]=t->GetTrackletIndex(i);
	224
	225	// add track to AliESDEvent
	226	esdEvent->AddTrack(&track);
	227
	228	return kTRUE;
	229	}
	230
	231	//_____________________________________________________________________________
	232	void AliHLTGlobalTrackMerger::SetParameter(Double_t maxy, Double_t maxz, Double_t maxsnp, Double_t maxtgl, Double_t signed1Pt)
	233	{
	234	//set parameters for merger
	235	fMaxY = maxy;
	236	fMaxZ = maxz;
	237	fMaxSnp = maxsnp;
	238	fMaxTgl = maxtgl;
	239	fMaxSigned1Pt = signed1Pt;
	240	}
	241
	242	//_____________________________________________________________________________
4b6d0cc6	243	Bool_t AliHLTGlobalTrackMerger::MatchTracks(AliExternalTrackParam trackTPC, AliESDtrack trackTRD)
ec6160d5	244	{
	245	// match TPC and TRD tracks
	246	// return kTRUE in case of matching
	247
	248	if(!trackTPC) return kFALSE;
	249	if(!trackTRD) return kFALSE;
	250
a9f060e5	251	Double_t x_tpc=trackTPC->GetX();
	252	Double_t y_tpc=trackTPC->GetY();
	253	Double_t z_tpc=trackTPC->GetZ();
	254	Double_t snp_tpc=trackTPC->GetSnp();
	255	Double_t tgl_tpc=trackTPC->GetTgl();
	256	Double_t signed1Pt_tpc=trackTPC->GetSigned1Pt();
	257
	258	Double_t x_trd=trackTRD->GetX();
	259	Double_t y_trd=trackTRD->GetY();
	260	Double_t z_trd=trackTRD->GetZ();
	261	Double_t snp_trd=trackTRD->GetSnp();
	262	Double_t tgl_trd=trackTRD->GetTgl();
	263	Double_t signed1Pt_trd=trackTRD->GetSigned1Pt();
	264
	265	// debug stream
18ada816	266	// if (AliTPCReconstructor::StreamLevel()>0) {
	267	// //TTreeSRedirector &cstream = *fDebugStreamer;
	268	// *fDebugStreamer<<"match"<<
	269	// "x_tpc="<<x_tpc<<
	270	// "y_tpc="<<y_tpc<<
	271	// "z_tpc="<<z_tpc<<
	272	// "snp_tpc="<<snp_tpc<<
	273	// "tgl_tpc="<<tgl_tpc<<
	274	// "signed1Pt_tpc="<<signed1Pt_tpc<<
	275	// "x_trd="<<x_trd<<
	276	// "y_trd="<<y_trd<<
	277	// "z_trd="<<z_trd<<
	278	// "snp_trd="<<snp_trd<<
	279	// "tgl_trd="<<tgl_trd<<
	280	// "signed1Pt_trd="<<signed1Pt_trd<<
	281	// "\n";
	282	// }
a9f060e5	283
8b7a0f3c	284	if (TMath::Abs(x_tpc-x_trd) > 0) {/* get rid of warning*/;}
a9f060e5	285	if (TMath::Abs(y_tpc-y_trd) > fMaxY) return kFALSE;
	286	if (TMath::Abs(z_tpc-z_trd) > fMaxZ) return kFALSE;
	287	if (TMath::Abs(snp_tpc-snp_trd) > fMaxSnp) return kFALSE;
	288	if (TMath::Abs(tgl_tpc-tgl_trd) > fMaxTgl) return kFALSE;
	289	if (TMath::Abs(signed1Pt_tpc-signed1Pt_trd) > fMaxSigned1Pt) return kFALSE;
ec6160d5	290
	291	return kTRUE;
	292	}
	293
	294	//_____________________________________________________________________________
	295	Bool_t AliHLTGlobalTrackMerger::SmoothTracks( const Double_t T1[], const Double_t C1[], Double_t Chi21, Int_t NDF1,
	296	const Double_t T2[], const Double_t C2[], Double_t Chi22, Int_t NDF2,
	297	Double_t T [], Double_t C [], Double_t &Chi2, Int_t &NDF,
	298	Int_t N )
	299	{
	300	//* Smooth two tracks with parameter vectors of size N
	301	//*
	302	//* Input:
	303	//*
	304	//* T1[N], T2[N] - tracks
	305	//* C1[N(N+1)/2], C2[N(N+1)/2] - covariance matrices in low-diagonal form:
	306	//* C = { c00,
	307	//* c10, c11,
	308	//* c20, c21, c22,
	309	//* ... };
	310	//* Chi2{1,2}, NDF{1,2} - \Chi^2 and "Number of Degrees of Freedom" values for both tracks
	311	//* Output:
	312	//*
	313	//* T[N], C[N] ( can be aqual to {T1,C1}, or {T2,C2} )
	314	//* Chi2, NDF
	315	//*
	316	//* returns error flag (0 means OK, 1 not OK )
	317
	318	Int_t M = N*(N+1)/2;
	319
	320	Double_t A[M];
	321	Double_t K[N*N];
	322
	323	for(Int_t k=0; k<M; k++) A[k] = C1[k] + C2[k];
	324	Bool_t err = InvertS(A,N);
	325	if( err ) return 1;
	326
	327	Chi2 = Chi21 + Chi22;
	328	NDF = NDF1 + NDF2;
	329
	330	MultSSQ( C1, A, K, N);
	331	Double_t r[N];
	332	for( Int_t k=0; k<N;k++) r[k] = T1[k] - T2[k];
	333	for( Int_t k=0; k<N;k++ )
	334	for( Int_t l=0;l<N;l++) T[k] = T1[k] - K[kN+l]r[l];
	335
	336	for( Int_t ind=0,i=0; i<N; i++ ){
	337	for( Int_t j=0; j<i; j++ ) Chi2+= 2r[i]r[j]*A[ind++];
	338	Chi2+= r[i]r[i]A[ind++];
	339	}
	340	NDF+=N;
	341
	342	for( Int_t l=0; l<N; l++ ) K[ (N+1)*l ] -= 1;
	343
	344	for( Int_t ind = 0, l=0; l<N; ++l ){
	345	for( Int_t j=0; j<=l; ++j, ind++ ){
	346	A[ind] = 0;
	347	for( Int_t k=0; k<N; ++k ) A[ind] -= K[lN+k] C1[IndexS(j,k)];
	348	}
	349	}
	350	for( Int_t l=0; l<N; l++ ) C[l] = A[l];
	351	return 0;
	352	}
	353
354	//_____________________________________________________________________________
355	void AliHLTGlobalTrackMerger::MultSSQ( const Double_t A, const Double_t B, Double_t *C, Int_t N )
356	{
357	for( Int_t ind=0, i=0; i<N; ++i ){
358	for( Int_t j=0; j<N; ++j, ++ind ){
359	C[ind] = 0;
360	for( Int_t k=0; k<N; ++k ) C[ind] += A[IndexS(i,k)] * B[IndexS(k,j)];
361	}
362	}
363	}
364
365	//_____________________________________________________________________________
366	Bool_t AliHLTGlobalTrackMerger::InvertS( Double_t A[], Int_t N )
367	{
368	//* input: simmetric > 0 NxN matrix A = {a11,a21,a22,a31..a33,..}
369	//* output: inverse A, in case of problems fill zero and return 1
370	//*
371	//* A->low triangular Anew : A = Anew x Anew^T
372	//* method:
373	//* for(j=1,N) for(i=j,N) Aij=(Aii-sum_{k=1}^{j-1}Aik*Ajk )/Ajj
374	//*
375
376	Bool_t ret = 0;
377
378	const Double_t ZERO = 1.E-20;
379
380	{
381	Double_t j1 = A, jj = A;
382	for( Int_t j=1; j<=N; j1+=j++, jj+=j ){
383	Double_t *ik = j1, x = 0;
384	while( ik!=jj ){
385	x -= (ik) (*ik);
386	ik++;
387	}
388	x += *ik;
389	if( x > ZERO ){
390	x = sqrt(x);
391	*ik = x;
392	ik++;
393	x = 1 / x;
394	for( Int_t step=1; step<=N-j; ik+=++step ){ // ik==Ai1
395	Double_t sum = 0;
bb7774d6	396	for( Double_t jk=j1; jk!=jj; sum += ((jk++)) * (*(ik++)) ) {}
ec6160d5	397	ik = (ik - sum) * x; // ik == Aij
	398	}
	399	}else{
	400	Double_t *ji=jj;
	401	for( Int_t i=j; i<N; i++ ) *(ji+=i) = 0.;
	402	ret = 1;
	403	}
	404	}
	405	}
	406
	407	//* A -> Ainv
	408	//* method :
	409	//* for(i=1,N){
	410	//* Aii = 1/Aii;
	411	//* for(j=1,i-1) Aij=-(sum_{k=j}^{i-1} Aik * Akj) / Aii ;
	412	//* }
	413
	414	{
	415	Double_t ii=A,ij=A;
	416	for( Int_t i = 1; i<=N; ij=ii+1, ii+=++i ){
	417	if( *ii > ZERO ){
	418	Double_t x = -(ii = 1./ ii);
	419	{
	420	Double_t *jj = A;
	421	for( Int_t j=1; j<i; jj+=++j, ij++ ){
	422	Double_t ik = ij, kj = jj, sum = 0.;
	423	for( Int_t k=j; ik!=ii; kj+=k++, ik++ ){
	424	sum += ik *kj;
	425	}
	426	kj = sum x;
	427	}
	428	}
	429	}else{
	430	for( Double_t *ik = ij; ik!=ii+1; ik++ ){
	431	*ik = 0.;
	432	}
	433	ret = 1;
	434	}
	435	}
	436	}
	437
	438	//* A -> A^T x A
	439	//* method:
	440	//* Aij = sum_{k=i}^N Aki * Akj
	441
	442	{
	443	Double_t ii=A, ij=A;
	444	for( Int_t i=1; i<=N; ii+=++i ){
	445	do{
	446	Double_t ki = ii, kj = ij, sum = 0.;
	447	for( Int_t k=i; k<=N; ki+=k, kj+=k++ ) sum += (ki) (*kj);
	448	*ij = sum;
	449	}while( (ij++)!=ii );
	450	}
	451	}
	452	return ret;
	453	}
	454
	455	//_____________________________________________________________________________
	456	void AliHLTGlobalTrackMerger::PropagateTracksToDCA(AliESDEvent *esdEvent)
	457	{
	458	// try to propagate all tracks to DCA to primary vertex
	459	if(!esdEvent) return;
	460
461	const Double_t kBz = esdEvent->GetMagneticField();
462	const Double_t kSmallRadius = 2.8; // [cm] something less than the beam pipe radius
463	const Double_t kMaxStep = 10.0; // [cm] track propagation step
464	Bool_t isOK = kFALSE;
465
466	Int_t nTracks = esdEvent->GetNumberOfTracks();
467	for(Int_t iTrack = 0; iTrack<nTracks; ++iTrack) {
468	AliESDtrack *track = esdEvent->GetTrack(iTrack);
469	if(!track) continue;
470
ec6160d5	471	// propagate to small radius (material budget included)
	472	isOK = AliTracker::PropagateTrackTo(track,kSmallRadius,track->GetMass(),kMaxStep,kFALSE);
	473
ec6160d5	474	// relate tracks to DCA to primary vertex
	475	if(isOK)
	476	{
	477	track->RelateToVertex(fVertex, kBz, kVeryBig);
a9f060e5	478	HLTInfo("1-------: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",track->GetAlpha(),track->GetX(),track->GetY(),track->GetZ(),track->GetSnp(),track->GetTgl(),track->GetSigned1Pt());
	479	}
	480
	481	//
	482	// the same procedure must be repeated for TPCinner (TPC only) tracks
	483	//
	484	AliExternalTrackParam tpcTrack = (AliExternalTrackParam )track->GetTPCInnerParam();
	485	if(!tpcTrack) continue;
	486
	487	// propagate tpcTracks to small radius (material budget included)
	488	isOK = AliTracker::PropagateTrackTo(tpcTrack,kSmallRadius,track->GetMass(),kMaxStep,kFALSE);
	489
	490	// relate tracks to DCA to primary vertex
	491	if(isOK)
	492	{
	493	Double_t par[2], cov[3];
	494	tpcTrack->PropagateToDCA(fVertex, kBz, kVeryBig,par,cov);
	495	HLTInfo("2-------: alpha %f, x %f, y %f, z %f, snp %f, tgl %f, 1pt %f",tpcTrack->GetAlpha(),tpcTrack->GetX(),tpcTrack->GetY(),tpcTrack->GetZ(),tpcTrack->GetSnp(),tpcTrack->GetTgl(),tpcTrack->GetSigned1Pt());
ec6160d5	496	}
	497	}
	498	}