[u/mrichter/AliRoot.git] / TOF / AliTOFtracker.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.                  *
 **************************************************************************/
// AliTOFtracker Class
// Task: Perform association of the ESD tracks to TOF Clusters
// and Update ESD track with associated TOF Cluster parameters 
//
// -- Authors : S. Arcelli, C. Zampolli (Bologna University and INFN) 
// -- Contacts: Annalisa.De.Caro@cern.ch
// --         : Chiara.Zampolli@bo.infn.it
// --         : Silvia.Arcelli@bo.infn.it
//--------------------------------------------------------------------

#include <Rtypes.h>
#include "AliTOFtracker.h"
#include "AliTOFtrack.h"
#include "TClonesArray.h"
#include "AliLog.h"
#include "AliTOFdigit.h"
#include "AliTOFGeometry.h"
#include "AliRun.h"
#include "AliModule.h"

ClassImp(AliTOFtracker)

//_____________________________________________________________________________
AliTOFtracker::AliTOFtracker(AliTOFGeometry * geom, Double_t parPID[2]) { 
  //AliTOFtracker main Ctor

  fHoles=true;
  fNseeds=0;
  fNseedsTOF=0;
  fngoodmatch=0;
  fnbadmatch=0;
  fnunmatch=0;
  fnmatch=0;
  fGeom = geom;
  fTOFpid = new AliTOFpidESD(parPID);
  fR=378.; 
  fTOFHeigth=15.3;  
  fdCut=3.; 
  fDy=AliTOFGeometry::XPad(); 
  fDz=AliTOFGeometry::ZPad(); 
  fDx=1.5; 
  fSeeds=0x0;
  fTracks=0x0;
  fN=0;
  Init(); // temporary solution to know about Holes/no Holes
}
//_____________________________________________________________________________
AliTOFtracker::AliTOFtracker(const AliTOFtracker &t):AliTracker() { 
  //AliTOFtracker copy Ctor

  fHoles=t.fHoles;
  fNseeds=t.fNseeds;
  fNseedsTOF=t.fNseedsTOF;
  fngoodmatch=t.fngoodmatch;
  fnbadmatch=t.fnbadmatch;
  fnunmatch=t.fnunmatch;
  fnmatch=t.fnmatch;
  fGeom = t.fGeom;
  fTOFpid = t.fTOFpid;
  fR=t.fR; 
  fTOFHeigth=t.fTOFHeigth;  
  fdCut=t.fdCut; 
  fDy=t.fDy; 
  fDz=t.fDz; 
  fDx=1.5; 
  fSeeds=t.fSeeds;
  fTracks=t.fTracks;
  fN=t.fN;
}
//_____________________________________________________________________________
void AliTOFtracker::Init() { 

// temporary solution to know about Holes/no Holes, will be implemented as 
// an AliTOFGeometry getter

  AliModule* frame=gAlice->GetModule("FRAME"); 

  if(!frame) {
    AliError("Could Not load FRAME! Assume Frame with Holes");
    fHoles=true;
  } else{
    if(frame->IsVersion()==1) {fHoles=false;}    
    else {fHoles=true;}      
  }
}
//_____________________________________________________________________________
Int_t AliTOFtracker::PropagateBack(AliESD* event) {
  //
  // Gets seeds from ESD event and Match with TOF Clusters
  //


  //Initialise some counters

  fNseeds=0;
  fNseedsTOF=0;
  fngoodmatch=0;
  fnbadmatch=0;
  fnunmatch=0;
  fnmatch=0;

  Int_t ntrk=event->GetNumberOfTracks();
  fNseeds = ntrk;
  fSeeds= new TClonesArray("AliESDtrack");
  TClonesArray &aESDTrack = *fSeeds;


  //Load ESD tracks into a local Array of ESD Seeds

  for (Int_t i=0; i<fNseeds; i++) {
    AliESDtrack *t=event->GetTrack(i);
    new(aESDTrack[i]) AliESDtrack(*t);
  }

  //Prepare ESD tracks candidates for TOF Matching
  CollectESD();

  //First Step with Strict Matching Criterion
  MatchTracks(kFALSE);

  //Second Step with Looser Matching Criterion
  MatchTracks(kTRUE);

  AliInfo(Form("Number of matched tracks: %d",fnmatch));
  AliInfo(Form("Number of good matched tracks: %d",fngoodmatch));
  AliInfo(Form("Number of bad  matched tracks: %d",fnbadmatch));

  //Update the matched ESD tracks

  for (Int_t i=0; i<ntrk; i++) {
    AliESDtrack *t=event->GetTrack(i);
    AliESDtrack *seed =(AliESDtrack*)fSeeds->UncheckedAt(i);
    if(seed->GetTOFsignal()>0){
      t->SetTOFsignal(seed->GetTOFsignal());
      t->SetTOFcluster(seed->GetTOFcluster());
      AliTOFtrack *track = new AliTOFtrack(*seed); 
      t->UpdateTrackParams(track,AliESDtrack::kTOFout);    
      delete track;
    }
  }


  //Make TOF PID
  fTOFpid->MakePID(event);

  if (fSeeds) {
    fSeeds->Delete();
    delete fSeeds;
    fSeeds = 0x0;
  }
  if (fTracks) {
    fTracks->Delete();
    delete fTracks;
    fTracks = 0x0;
  }
  return 0;
  
}
//_________________________________________________________________________
void AliTOFtracker::CollectESD() {
   //prepare the set of ESD tracks to be matched to clusters in TOF
 
  fTracks= new TClonesArray("AliTOFtrack");
  TClonesArray &aTOFTrack = *fTracks;
  for (Int_t i=0; i<fNseeds; i++) {

    AliESDtrack *t =(AliESDtrack*)fSeeds->UncheckedAt(i);
    if ((t->GetStatus()&AliESDtrack::kTPCout)==0)continue;

    // TRD good tracks, already propagated at 371 cm

    AliTOFtrack *track = new AliTOFtrack(*t); // New
    Double_t x = track->GetX(); //New

    if (((t->GetStatus()&AliESDtrack::kTRDout)!=0 ) && 
	 ( x >= AliTOFGeometry::RinTOF()) ){
      track->SetSeedIndex(i);
      t->UpdateTrackParams(track,AliESDtrack::kTOFout);    
      new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
      fNseedsTOF++;
      delete track;
    }

    // Propagate the rest of TPCbp  

    else {
      if(track->PropagateToInnerTOF(fHoles)){ // temporary solution
	//      if(track->PropagateToInnerTOF(fGeom->GetHoles())){
      	track->SetSeedIndex(i);
	t->UpdateTrackParams(track,AliESDtrack::kTOFout);    
 	new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
	fNseedsTOF++;
      }
      delete track;
    }
  }

  // Sort according uncertainties on track position 
  fTracks->Sort();

}
//_________________________________________________________________________
void AliTOFtracker::MatchTracks( Bool_t mLastStep){

  //Match ESD tracks to clusters in TOF

  static const Double_t kMasses[]={
    0.000511, 0.105658, 0.139570, 0.493677, 0.938272, 1.875613
  };
  
  Int_t nSteps=(Int_t)(fTOFHeigth/0.1);

  //PH Arrays (moved outside of the loop)
  Float_t * trackPos[4];
  for (Int_t ii=0; ii<4; ii++) trackPos[ii] = new Float_t[nSteps];
  Int_t * clind[6];
  for (Int_t ii=0;ii<6;ii++) clind[ii] = new Int_t[fN];
  
  for (Int_t i=0; i<fNseedsTOF; i++) {

    AliTOFtrack *track =(AliTOFtrack*)fTracks->UncheckedAt(i);
    AliESDtrack *t =(AliESDtrack*)fSeeds->UncheckedAt(track->GetSeedIndex());
    if(t->GetTOFsignal()>0. ) continue;
    AliTOFtrack *trackTOFin =new AliTOFtrack(*track);

    // Some init 

    Int_t         index[10000];
    Float_t        dist[10000];
    Float_t       cxpos[10000];
    Float_t       crecL[10000];
     
    // Determine a window around the track

    Double_t x,par[5]; 
    trackTOFin->GetExternalParameters(x,par);
    Double_t cov[15]; 
    trackTOFin->GetExternalCovariance(cov);
    Float_t scalefact=3.;    
    Double_t dphi=
      scalefact*
      ((5*TMath::Sqrt(cov[0]) + 0.5*fDy + 2.5*TMath::Abs(par[2]))/fR); 
    Double_t dz=
      scalefact*
      (5*TMath::Sqrt(cov[2]) + 0.5*fDz + 2.5*TMath::Abs(par[3]));
    
    Double_t phi=TMath::ATan2(par[0],x) + trackTOFin->GetAlpha();
    if (phi<-TMath::Pi())phi+=2*TMath::Pi();
    if (phi>=TMath::Pi())phi-=2*TMath::Pi();
    Double_t z=par[1];   

    Int_t nc=0;
    
    // find the clusters in the window of the track

    for (Int_t k=FindClusterIndex(z-dz); k<fN; k++) {
      AliTOFcluster *c=fClusters[k];
      if (c->GetZ() > z+dz) break;
      if (c->IsUsed()) continue;
      
      Double_t dph=TMath::Abs(c->GetPhi()-phi);
      if (dph>TMath::Pi()) dph-=2.*TMath::Pi();
      if (TMath::Abs(dph)>dphi) continue;
    
      clind[0][nc] = c->GetDetInd(0);
      clind[1][nc] = c->GetDetInd(1);
      clind[2][nc] = c->GetDetInd(2);
      clind[3][nc] = c->GetDetInd(3);
      clind[4][nc] = c->GetDetInd(4);
      clind[5][nc] = k;      
      nc++;
    }

    //start fine propagation 

    Int_t nStepsDone = 0;
    for( Int_t istep=0; istep<nSteps; istep++){ 

      Float_t xs=AliTOFGeometry::RinTOF()+istep*0.1;
      Double_t ymax=xs*TMath::Tan(0.5*AliTOFGeometry::GetAlpha());

      Bool_t skip=kFALSE;
      Double_t ysect=trackTOFin->GetYat(xs,skip);
      if(skip)break;
      if (ysect > ymax) {
	if (!trackTOFin->Rotate(AliTOFGeometry::GetAlpha())) {
	  break;
	}
      } else if (ysect <-ymax) {
	if (!trackTOFin->Rotate(-AliTOFGeometry::GetAlpha())) {
	  break;
	}
      }

      if(!trackTOFin->PropagateTo(xs)) {
	break;
      }

      nStepsDone++;

      // store the running point (Globalrf) - fine propagation     

      Double_t x,y,z;
      trackTOFin->GetGlobalXYZ(x,y,z);
      trackPos[0][istep]= (Float_t) x;
      trackPos[1][istep]= (Float_t) y;
      trackPos[2][istep]= (Float_t) z;   
      trackPos[3][istep]= trackTOFin->GetIntegratedLength();
    }


    Int_t nfound = 0;
    for (Int_t istep=0; istep<nStepsDone; istep++) {

      Bool_t isInside =kFALSE;
      Float_t ctrackPos[3];	

      ctrackPos[0]= trackPos[0][istep];
      ctrackPos[1]= trackPos[1][istep];
      ctrackPos[2]= trackPos[2][istep];

      //now see whether the track matches any of the TOF clusters            

      for (Int_t i=0; i<nc; i++){
	Int_t cind[5];
	cind[0]= clind[0][i];
	cind[1]= clind[1][i];
	cind[2]= clind[2][i];
	cind[3]= clind[3][i];
	cind[4]= clind[4][i];
        Bool_t accept = kFALSE;
        if( mLastStep)accept = (fGeom->DistanceToPad(cind,ctrackPos)<fdCut);
        if(!mLastStep)accept = (fGeom->IsInsideThePad(cind,ctrackPos));
	if(accept){
	  if(!mLastStep)isInside=kTRUE;
	  dist[nfound]=fGeom->DistanceToPad(cind,ctrackPos);
	  crecL[nfound]=trackPos[3][istep];
	  index[nfound]=clind[5][i]; // store cluster id 	    
	  cxpos[nfound]=AliTOFGeometry::RinTOF()+istep*0.1; //store prop.radius
	  nfound++;
	  if(isInside)break;
	}//end if accept
      } //end for on the clusters


      if(isInside)break;
    } //end for on the steps     


    if (nfound == 0 ) {
      fnunmatch++;
      delete trackTOFin;
      continue;
    }
    
    fnmatch++;

    // now choose the cluster to be matched with the track.

    Int_t idclus=0;
    Float_t  recL = 0.;
    Float_t  xpos=0.;
    Float_t  mindist=1000.;
    for (Int_t iclus= 0; iclus<nfound;iclus++){
      if (dist[iclus]< mindist){
      	mindist = dist[iclus];
      	xpos = cxpos[iclus];
        idclus =index[iclus]; 
        recL=crecL[iclus]+fDx*0.5;
      }
    }

    AliTOFcluster *c=fClusters[idclus];
    c->Use();

    // Track length correction for matching Step 2 

    if(mLastStep){
      Float_t rc=TMath::Sqrt(c->GetR()*c->GetR() + c->GetZ()*c->GetZ());
      Float_t rt=TMath::Sqrt(trackPos[0][70]*trackPos[0][70]
			     +trackPos[1][70]*trackPos[1][70]
			     +trackPos[2][70]*trackPos[2][70]);
      Float_t dlt=rc-rt;      
      recL=trackPos[3][70]+dlt;
    }    

    if (
	(c->GetLabel(0)==TMath::Abs(trackTOFin->GetLabel()))
	||
	(c->GetLabel(1)==TMath::Abs(trackTOFin->GetLabel()))
	||
	(c->GetLabel(2)==TMath::Abs(trackTOFin->GetLabel()))
	) {
      fngoodmatch++;
    }
    else{
      fnbadmatch++;
    }

    delete trackTOFin;

    Double_t tof=50*c->GetTDC()+32; // in ps
    t->SetTOFsignal(tof);
    t->SetTOFcluster(c->GetIndex());
    Double_t time[10]; t->GetIntegratedTimes(time);
    Double_t mom=t->GetP();
    for(Int_t j=0;j<=5;j++){
      Double_t mass=kMasses[j];
      time[j]+=(recL-trackPos[3][0])/3e-2*TMath::Sqrt(mom*mom+mass*mass)/mom;
    }

    AliTOFtrack *trackTOFout = new AliTOFtrack(*t); 
    trackTOFout->PropagateTo(xpos);
    t->UpdateTrackParams(trackTOFout,AliESDtrack::kTOFout);    
    t->SetIntegratedLength(recL);
    t->SetIntegratedTimes(time);

    delete trackTOFout;
  }
  for (Int_t ii=0; ii<4; ii++) delete [] trackPos[ii];
  for (Int_t ii=0;ii<6;ii++) delete [] clind[ii];
}
//_________________________________________________________________________
Int_t AliTOFtracker::LoadClusters(TTree *dTree) {
  //--------------------------------------------------------------------
  //This function loads the TOF clusters
  //--------------------------------------------------------------------

  TBranch *branch=dTree->GetBranch("TOF");
  if (!branch) { 
    AliError("can't get the branch with the TOF digits !");
    return 1;
  }

  TClonesArray dummy("AliTOFdigit",10000), *digits=&dummy;
  branch->SetAddress(&digits);

  dTree->GetEvent(0);
  Int_t nd=digits->GetEntriesFast();
  AliInfo(Form("number of digits: %d",nd));

  for (Int_t i=0; i<nd; i++) {
    AliTOFdigit *d=(AliTOFdigit*)digits->UncheckedAt(i);
    Int_t dig[5]; Float_t g[3];
    dig[0]=d->GetSector();
    dig[1]=d->GetPlate();
    dig[2]=d->GetStrip();
    dig[3]=d->GetPadz();
    dig[4]=d->GetPadx();

    fGeom->GetPos(dig,g);

    Double_t h[5];
    h[0]=TMath::Sqrt(g[0]*g[0]+g[1]*g[1]);
    h[1]=TMath::ATan2(g[1],g[0]); h[2]=g[2]; 
    h[3]=d->GetTdc(); h[4]=d->GetAdc();

    AliTOFcluster *cl=new AliTOFcluster(h,d->GetTracks(),dig,i);
    InsertCluster(cl);
  }  

  return 0;
}
//_________________________________________________________________________
void AliTOFtracker::UnloadClusters() {
  //--------------------------------------------------------------------
  //This function unloads TOF clusters
  //--------------------------------------------------------------------
  for (Int_t i=0; i<fN; i++) delete fClusters[i];
  fN=0;
}

//_________________________________________________________________________
Int_t AliTOFtracker::InsertCluster(AliTOFcluster *c) {
  //--------------------------------------------------------------------
  //This function adds a cluster to the array of clusters sorted in Z
  //--------------------------------------------------------------------
  if (fN==kMaxCluster) {
    AliError("Too many clusters !");
    return 1;
  }

  if (fN==0) {fClusters[fN++]=c; return 0;}
  Int_t i=FindClusterIndex(c->GetZ());
  memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTOFcluster*));
  fClusters[i]=c; fN++;

  return 0;
}

//_________________________________________________________________________
Int_t AliTOFtracker::FindClusterIndex(Double_t z) const {
  //--------------------------------------------------------------------
  // This function returns the index of the nearest cluster 
  //--------------------------------------------------------------------
  if (fN==0) return 0;
  if (z <= fClusters[0]->GetZ()) return 0;
  if (z > fClusters[fN-1]->GetZ()) return fN;
  Int_t b=0, e=fN-1, m=(b+e)/2;
  for (; b<e; m=(b+e)/2) {
    if (z > fClusters[m]->GetZ()) b=m+1;
    else e=m; 
  }
  return m;
}
Commit	Line	Data
596a855f	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	**************************************************************************/
74ea065c	15	// AliTOFtracker Class
	16	// Task: Perform association of the ESD tracks to TOF Clusters
	17	// and Update ESD track with associated TOF Cluster parameters
	18	//
	19	// -- Authors : S. Arcelli, C. Zampolli (Bologna University and INFN)
	20	// -- Contacts: Annalisa.De.Caro@cern.ch
	21	// -- : Chiara.Zampolli@bo.infn.it
	22	// -- : Silvia.Arcelli@bo.infn.it
	23	//--------------------------------------------------------------------
596a855f	24
2871e58d	25	#include <Rtypes.h>
596a855f	26	#include "AliTOFtracker.h"
74ea065c	27	#include "AliTOFtrack.h"
74ea065c	28	#include "TClonesArray.h"
d076c8d5	29	#include "AliLog.h"
74ea065c	30	#include "AliTOFdigit.h"
74ea065c	31	#include "AliTOFGeometry.h"
74ea065c	32	#include "AliRun.h"
74ea065c	33	#include "AliModule.h"
596a855f	34
	35	ClassImp(AliTOFtracker)
	36
74ea065c	37	//_____________________________________________________________________________
	38	AliTOFtracker::AliTOFtracker(AliTOFGeometry * geom, Double_t parPID[2]) {
	39	//AliTOFtracker main Ctor
	40
	41	fHoles=true;
	42	fNseeds=0;
	43	fNseedsTOF=0;
	44	fngoodmatch=0;
	45	fnbadmatch=0;
	46	fnunmatch=0;
	47	fnmatch=0;
	48	fGeom = geom;
	49	fTOFpid = new AliTOFpidESD(parPID);
	50	fR=378.;
	51	fTOFHeigth=15.3;
	52	fdCut=3.;
	53	fDy=AliTOFGeometry::XPad();
	54	fDz=AliTOFGeometry::ZPad();
	55	fDx=1.5;
	56	fSeeds=0x0;
	57	fTracks=0x0;
	58	fN=0;
	59	Init(); // temporary solution to know about Holes/no Holes
	60	}
	61	//_____________________________________________________________________________
	62	AliTOFtracker::AliTOFtracker(const AliTOFtracker &t):AliTracker() {
	63	//AliTOFtracker copy Ctor
	64
	65	fHoles=t.fHoles;
	66	fNseeds=t.fNseeds;
	67	fNseedsTOF=t.fNseedsTOF;
	68	fngoodmatch=t.fngoodmatch;
	69	fnbadmatch=t.fnbadmatch;
	70	fnunmatch=t.fnunmatch;
	71	fnmatch=t.fnmatch;
	72	fGeom = t.fGeom;
	73	fTOFpid = t.fTOFpid;
	74	fR=t.fR;
	75	fTOFHeigth=t.fTOFHeigth;
	76	fdCut=t.fdCut;
	77	fDy=t.fDy;
	78	fDz=t.fDz;
	79	fDx=1.5;
	80	fSeeds=t.fSeeds;
	81	fTracks=t.fTracks;
	82	fN=t.fN;
	83	}
	84	//_____________________________________________________________________________
	85	void AliTOFtracker::Init() {
	86
	87	// temporary solution to know about Holes/no Holes, will be implemented as
	88	// an AliTOFGeometry getter
	89
	90	AliModule* frame=gAlice->GetModule("FRAME");
	91
	92	if(!frame) {
d076c8d5	93	AliError("Could Not load FRAME! Assume Frame with Holes");
74ea065c	94	fHoles=true;
	95	} else{
	96	if(frame->IsVersion()==1) {fHoles=false;}
	97	else {fHoles=true;}
	98	}
	99	}
	100	//_____________________________________________________________________________
	101	Int_t AliTOFtracker::PropagateBack(AliESD* event) {
	102	//
	103	// Gets seeds from ESD event and Match with TOF Clusters
	104	//
	105
	106
	107	//Initialise some counters
	108
	109	fNseeds=0;
	110	fNseedsTOF=0;
	111	fngoodmatch=0;
	112	fnbadmatch=0;
	113	fnunmatch=0;
	114	fnmatch=0;
	115
	116	Int_t ntrk=event->GetNumberOfTracks();
	117	fNseeds = ntrk;
	118	fSeeds= new TClonesArray("AliESDtrack");
	119	TClonesArray &aESDTrack = *fSeeds;
	120
	121
	122	//Load ESD tracks into a local Array of ESD Seeds
	123
	124	for (Int_t i=0; i<fNseeds; i++) {
	125	AliESDtrack *t=event->GetTrack(i);
	126	new(aESDTrack[i]) AliESDtrack(*t);
	127	}
	128
	129	//Prepare ESD tracks candidates for TOF Matching
	130	CollectESD();
	131
	132	//First Step with Strict Matching Criterion
	133	MatchTracks(kFALSE);
	134
	135	//Second Step with Looser Matching Criterion
	136	MatchTracks(kTRUE);
	137
d076c8d5	138	AliInfo(Form("Number of matched tracks: %d",fnmatch));
	139	AliInfo(Form("Number of good matched tracks: %d",fngoodmatch));
	140	AliInfo(Form("Number of bad matched tracks: %d",fnbadmatch));
74ea065c	141
	142	//Update the matched ESD tracks
	143
	144	for (Int_t i=0; i<ntrk; i++) {
	145	AliESDtrack *t=event->GetTrack(i);
	146	AliESDtrack seed =(AliESDtrack)fSeeds->UncheckedAt(i);
	147	if(seed->GetTOFsignal()>0){
	148	t->SetTOFsignal(seed->GetTOFsignal());
	149	t->SetTOFcluster(seed->GetTOFcluster());
	150	AliTOFtrack track = new AliTOFtrack(seed);
	151	t->UpdateTrackParams(track,AliESDtrack::kTOFout);
	152	delete track;
	153	}
	154	}
	155
	156
	157	//Make TOF PID
	158	fTOFpid->MakePID(event);
	159
7bf28302	160	if (fSeeds) {
	161	fSeeds->Delete();
	162	delete fSeeds;
	163	fSeeds = 0x0;
	164	}
	165	if (fTracks) {
	166	fTracks->Delete();
	167	delete fTracks;
	168	fTracks = 0x0;
	169	}
74ea065c	170	return 0;
	171
	172	}
	173	//_________________________________________________________________________
	174	void AliTOFtracker::CollectESD() {
	175	//prepare the set of ESD tracks to be matched to clusters in TOF
	176
	177	fTracks= new TClonesArray("AliTOFtrack");
	178	TClonesArray &aTOFTrack = *fTracks;
	179	for (Int_t i=0; i<fNseeds; i++) {
	180
	181	AliESDtrack t =(AliESDtrack)fSeeds->UncheckedAt(i);
	182	if ((t->GetStatus()&AliESDtrack::kTPCout)==0)continue;
	183
	184	// TRD good tracks, already propagated at 371 cm
	185
56da420e	186	AliTOFtrack track = new AliTOFtrack(t); // New
	187	Double_t x = track->GetX(); //New
	188
	189	if (((t->GetStatus()&AliESDtrack::kTRDout)!=0 ) &&
	190	( x >= AliTOFGeometry::RinTOF()) ){
74ea065c	191	track->SetSeedIndex(i);
	192	t->UpdateTrackParams(track,AliESDtrack::kTOFout);
	193	new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
	194	fNseedsTOF++;
	195	delete track;
	196	}
	197
	198	// Propagate the rest of TPCbp
	199
	200	else {
74ea065c	201	if(track->PropagateToInnerTOF(fHoles)){ // temporary solution
	202	// if(track->PropagateToInnerTOF(fGeom->GetHoles())){
	203	track->SetSeedIndex(i);
	204	t->UpdateTrackParams(track,AliESDtrack::kTOFout);
	205	new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
	206	fNseedsTOF++;
	207	}
	208	delete track;
	209	}
	210	}
	211
	212	// Sort according uncertainties on track position
	213	fTracks->Sort();
	214
	215	}
	216	//_________________________________________________________________________
	217	void AliTOFtracker::MatchTracks( Bool_t mLastStep){
	218
	219	//Match ESD tracks to clusters in TOF
	220
	221	static const Double_t kMasses[]={
	222	0.000511, 0.105658, 0.139570, 0.493677, 0.938272, 1.875613
	223	};
	224
	225	Int_t nSteps=(Int_t)(fTOFHeigth/0.1);
7bf28302	226
	227	//PH Arrays (moved outside of the loop)
	228	Float_t * trackPos[4];
	229	for (Int_t ii=0; ii<4; ii++) trackPos[ii] = new Float_t[nSteps];
	230	Int_t * clind[6];
	231	for (Int_t ii=0;ii<6;ii++) clind[ii] = new Int_t[fN];
74ea065c	232
	233	for (Int_t i=0; i<fNseedsTOF; i++) {
	234
	235	AliTOFtrack track =(AliTOFtrack)fTracks->UncheckedAt(i);
	236	AliESDtrack t =(AliESDtrack)fSeeds->UncheckedAt(track->GetSeedIndex());
7bf28302	237	if(t->GetTOFsignal()>0. ) continue;
74ea065c	238	AliTOFtrack trackTOFin =new AliTOFtrack(track);
74ea065c	239
	240	// Some init
	241
	242	Int_t index[10000];
	243	Float_t dist[10000];
	244	Float_t cxpos[10000];
	245	Float_t crecL[10000];
74ea065c	246
	247	// Determine a window around the track
	248
	249	Double_t x,par[5];
	250	trackTOFin->GetExternalParameters(x,par);
	251	Double_t cov[15];
	252	trackTOFin->GetExternalCovariance(cov);
	253	Float_t scalefact=3.;
	254	Double_t dphi=
	255	scalefact*
	256	((5TMath::Sqrt(cov[0]) + 0.5fDy + 2.5*TMath::Abs(par[2]))/fR);
	257	Double_t dz=
	258	scalefact*
	259	(5TMath::Sqrt(cov[2]) + 0.5fDz + 2.5*TMath::Abs(par[3]));
	260
	261	Double_t phi=TMath::ATan2(par[0],x) + trackTOFin->GetAlpha();
	262	if (phi<-TMath::Pi())phi+=2*TMath::Pi();
	263	if (phi>=TMath::Pi())phi-=2*TMath::Pi();
	264	Double_t z=par[1];
	265
74ea065c	266	Int_t nc=0;
	267
	268	// find the clusters in the window of the track
	269
	270	for (Int_t k=FindClusterIndex(z-dz); k<fN; k++) {
	271	AliTOFcluster *c=fClusters[k];
	272	if (c->GetZ() > z+dz) break;
	273	if (c->IsUsed()) continue;
	274
	275	Double_t dph=TMath::Abs(c->GetPhi()-phi);
	276	if (dph>TMath::Pi()) dph-=2.*TMath::Pi();
9b49e4c9	277	if (TMath::Abs(dph)>dphi) continue;
74ea065c	278
	279	clind[0][nc] = c->GetDetInd(0);
	280	clind[1][nc] = c->GetDetInd(1);
	281	clind[2][nc] = c->GetDetInd(2);
	282	clind[3][nc] = c->GetDetInd(3);
	283	clind[4][nc] = c->GetDetInd(4);
	284	clind[5][nc] = k;
	285	nc++;
	286	}
	287
	288	//start fine propagation
	289
	290	Int_t nStepsDone = 0;
	291	for( Int_t istep=0; istep<nSteps; istep++){
	292
	293	Float_t xs=AliTOFGeometry::RinTOF()+istep*0.1;
	294	Double_t ymax=xsTMath::Tan(0.5AliTOFGeometry::GetAlpha());
	295
	296	Bool_t skip=kFALSE;
	297	Double_t ysect=trackTOFin->GetYat(xs,skip);
	298	if(skip)break;
	299	if (ysect > ymax) {
	300	if (!trackTOFin->Rotate(AliTOFGeometry::GetAlpha())) {
	301	break;
	302	}
	303	} else if (ysect <-ymax) {
	304	if (!trackTOFin->Rotate(-AliTOFGeometry::GetAlpha())) {
	305	break;
	306	}
	307	}
	308
	309	if(!trackTOFin->PropagateTo(xs)) {
	310	break;
	311	}
	312
	313	nStepsDone++;
	314
	315	// store the running point (Globalrf) - fine propagation
	316
	317	Double_t x,y,z;
	318	trackTOFin->GetGlobalXYZ(x,y,z);
	319	trackPos[0][istep]= (Float_t) x;
	320	trackPos[1][istep]= (Float_t) y;
	321	trackPos[2][istep]= (Float_t) z;
	322	trackPos[3][istep]= trackTOFin->GetIntegratedLength();
	323	}
	324
	325
	326	Int_t nfound = 0;
	327	for (Int_t istep=0; istep<nStepsDone; istep++) {
	328
	329	Bool_t isInside =kFALSE;
	330	Float_t ctrackPos[3];
	331
	332	ctrackPos[0]= trackPos[0][istep];
	333	ctrackPos[1]= trackPos[1][istep];
	334	ctrackPos[2]= trackPos[2][istep];
	335
	336	//now see whether the track matches any of the TOF clusters
	337
	338	for (Int_t i=0; i<nc; i++){
	339	Int_t cind[5];
	340	cind[0]= clind[0][i];
	341	cind[1]= clind[1][i];
342	cind[2]= clind[2][i];
343	cind[3]= clind[3][i];
344	cind[4]= clind[4][i];
345	Bool_t accept = kFALSE;
346	if( mLastStep)accept = (fGeom->DistanceToPad(cind,ctrackPos)<fdCut);
347	if(!mLastStep)accept = (fGeom->IsInsideThePad(cind,ctrackPos));
348	if(accept){
349	if(!mLastStep)isInside=kTRUE;
350	dist[nfound]=fGeom->DistanceToPad(cind,ctrackPos);
351	crecL[nfound]=trackPos[3][istep];
352	index[nfound]=clind[5][i]; // store cluster id
353	cxpos[nfound]=AliTOFGeometry::RinTOF()+istep*0.1; //store prop.radius
354	nfound++;
355	if(isInside)break;
356	}//end if accept
357	} //end for on the clusters
9b49e4c9	358
9b49e4c9	359
74ea065c	360	if(isInside)break;
	361	} //end for on the steps
	362
9b49e4c9	363
9b49e4c9	364
74ea065c	365	if (nfound == 0 ) {
74ea065c	366	fnunmatch++;
7bf28302	367	delete trackTOFin;
74ea065c	368	continue;
	369	}
	370
	371	fnmatch++;
	372
	373	// now choose the cluster to be matched with the track.
	374
	375	Int_t idclus=0;
	376	Float_t recL = 0.;
	377	Float_t xpos=0.;
	378	Float_t mindist=1000.;
	379	for (Int_t iclus= 0; iclus<nfound;iclus++){
	380	if (dist[iclus]< mindist){
	381	mindist = dist[iclus];
	382	xpos = cxpos[iclus];
	383	idclus =index[iclus];
	384	recL=crecL[iclus]+fDx*0.5;
	385	}
	386	}
	387
	388	AliTOFcluster *c=fClusters[idclus];
	389	c->Use();
	390
	391	// Track length correction for matching Step 2
	392
	393	if(mLastStep){
	394	Float_t rc=TMath::Sqrt(c->GetR()c->GetR() + c->GetZ()c->GetZ());
	395	Float_t rt=TMath::Sqrt(trackPos[0][70]*trackPos[0][70]
	396	+trackPos[1][70]*trackPos[1][70]
	397	+trackPos[2][70]*trackPos[2][70]);
	398	Float_t dlt=rc-rt;
	399	recL=trackPos[3][70]+dlt;
	400	}
	401
	402	if (
	403	(c->GetLabel(0)==TMath::Abs(trackTOFin->GetLabel()))
	404	\|\|
	405	(c->GetLabel(1)==TMath::Abs(trackTOFin->GetLabel()))
	406	\|\|
	407	(c->GetLabel(2)==TMath::Abs(trackTOFin->GetLabel()))
	408	) {
	409	fngoodmatch++;
	410	}
	411	else{
	412	fnbadmatch++;
	413	}
	414
	415	delete trackTOFin;
	416
	417	Double_t tof=50*c->GetTDC()+32; // in ps
	418	t->SetTOFsignal(tof);
	419	t->SetTOFcluster(c->GetIndex());
	420	Double_t time[10]; t->GetIntegratedTimes(time);
	421	Double_t mom=t->GetP();
	422	for(Int_t j=0;j<=5;j++){
	423	Double_t mass=kMasses[j];
	424	time[j]+=(recL-trackPos[3][0])/3e-2TMath::Sqrt(mommom+mass*mass)/mom;
	425	}
	426
	427	AliTOFtrack trackTOFout = new AliTOFtrack(t);
	428	trackTOFout->PropagateTo(xpos);
	429	t->UpdateTrackParams(trackTOFout,AliESDtrack::kTOFout);
	430	t->SetIntegratedLength(recL);
	431	t->SetIntegratedTimes(time);
432
433	delete trackTOFout;
434	}
7bf28302	435	for (Int_t ii=0; ii<4; ii++) delete [] trackPos[ii];
7bf28302	436	for (Int_t ii=0;ii<6;ii++) delete [] clind[ii];
74ea065c	437	}
	438	//_________________________________________________________________________
	439	Int_t AliTOFtracker::LoadClusters(TTree *dTree) {
	440	//--------------------------------------------------------------------
	441	//This function loads the TOF clusters
	442	//--------------------------------------------------------------------
	443
	444	TBranch *branch=dTree->GetBranch("TOF");
	445	if (!branch) {
d076c8d5	446	AliError("can't get the branch with the TOF digits !");
74ea065c	447	return 1;
	448	}
	449
	450	TClonesArray dummy("AliTOFdigit",10000), *digits=&dummy;
	451	branch->SetAddress(&digits);
	452
	453	dTree->GetEvent(0);
	454	Int_t nd=digits->GetEntriesFast();
d076c8d5	455	AliInfo(Form("number of digits: %d",nd));
74ea065c	456
	457	for (Int_t i=0; i<nd; i++) {
	458	AliTOFdigit d=(AliTOFdigit)digits->UncheckedAt(i);
	459	Int_t dig[5]; Float_t g[3];
	460	dig[0]=d->GetSector();
	461	dig[1]=d->GetPlate();
	462	dig[2]=d->GetStrip();
	463	dig[3]=d->GetPadz();
	464	dig[4]=d->GetPadx();
	465
	466	fGeom->GetPos(dig,g);
	467
	468	Double_t h[5];
	469	h[0]=TMath::Sqrt(g[0]g[0]+g[1]g[1]);
	470	h[1]=TMath::ATan2(g[1],g[0]); h[2]=g[2];
	471	h[3]=d->GetTdc(); h[4]=d->GetAdc();
	472
	473	AliTOFcluster *cl=new AliTOFcluster(h,d->GetTracks(),dig,i);
	474	InsertCluster(cl);
	475	}
	476
	477	return 0;
	478	}
	479	//_________________________________________________________________________
	480	void AliTOFtracker::UnloadClusters() {
	481	//--------------------------------------------------------------------
	482	//This function unloads TOF clusters
	483	//--------------------------------------------------------------------
	484	for (Int_t i=0; i<fN; i++) delete fClusters[i];
	485	fN=0;
	486	}
	487
	488	//_________________________________________________________________________
	489	Int_t AliTOFtracker::InsertCluster(AliTOFcluster *c) {
	490	//--------------------------------------------------------------------
	491	//This function adds a cluster to the array of clusters sorted in Z
	492	//--------------------------------------------------------------------
	493	if (fN==kMaxCluster) {
d076c8d5	494	AliError("Too many clusters !");
74ea065c	495	return 1;
	496	}
	497
	498	if (fN==0) {fClusters[fN++]=c; return 0;}
	499	Int_t i=FindClusterIndex(c->GetZ());
	500	memmove(fClusters+i+1 ,fClusters+i,(fN-i)sizeof(AliTOFcluster));
	501	fClusters[i]=c; fN++;
	502
	503	return 0;
	504	}
	505
	506	//_________________________________________________________________________
	507	Int_t AliTOFtracker::FindClusterIndex(Double_t z) const {
	508	//--------------------------------------------------------------------
	509	// This function returns the index of the nearest cluster
	510	//--------------------------------------------------------------------
	511	if (fN==0) return 0;
	512	if (z <= fClusters[0]->GetZ()) return 0;
	513	if (z > fClusters[fN-1]->GetZ()) return fN;
	514	Int_t b=0, e=fN-1, m=(b+e)/2;
	515	for (; b<e; m=(b+e)/2) {
	516	if (z > fClusters[m]->GetZ()) b=m+1;
	517	else e=m;
	518	}
	519	return m;
	520	}
	521