/* $Id$ */
+#include "AliLog.h"
#include "AliESDtrack.h"
#include "AliTracker.h"
//_______________________________________________________________
AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
- ,fPIDquality(0)
+ ,fStatus(0)
,fDE(0.)
- ,fBackupTrack(0x0)
+ ,fkReconstructor(NULL)
+ ,fBackupTrack(NULL)
+ ,fTrackLow(NULL)
+ ,fTrackHigh(NULL)
{
//
// Default constructor
for(int ip=0; ip<kNplane; ip++){
fTrackletIndex[ip] = 0xffff;
- fTracklet[ip] = 0x0;
+ fTracklet[ip] = NULL;
}
}
//_______________________________________________________________
AliTRDtrackV1::AliTRDtrackV1(const AliTRDtrackV1 &ref) : AliKalmanTrack(ref)
- ,fPIDquality(ref.fPIDquality)
+ ,fStatus(ref.fStatus)
,fDE(ref.fDE)
- ,fBackupTrack(0x0)
+ ,fkReconstructor(ref.fkReconstructor)
+ ,fBackupTrack(NULL)
+ ,fTrackLow(NULL)
+ ,fTrackHigh(NULL)
{
//
// Copy constructor
fTrackletIndex[ip] = ref.fTrackletIndex[ip];
fTracklet[ip] = ref.fTracklet[ip];
}
-
+ if(ref.fTrackLow) fTrackLow = new AliExternalTrackParam(*ref.fTrackLow);
+ if(ref.fTrackHigh) fTrackHigh = new AliExternalTrackParam(*ref.fTrackHigh);
+
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];
//_______________________________________________________________
AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
- ,fPIDquality(0)
+ ,fStatus(0)
,fDE(0.)
- ,fBackupTrack(0x0)
+ ,fkReconstructor(NULL)
+ ,fBackupTrack(NULL)
+ ,fTrackLow(NULL)
+ ,fTrackHigh(NULL)
{
//
// Constructor from AliESDtrack
SetLabel(t.GetLabel());
SetChi2(0.0);
- SetMass(t.GetMass());
+
+ SetMass(t.GetMass()/*0.000510*/);
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;
+ fTracklet[ip] = NULL;
}
for(int i =0; i<3; i++) fBudget[i] = 0.;
}
//_______________________________________________________________
-AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 *trklts, const Double_t p[5], const Double_t cov[15]
+AliTRDtrackV1::AliTRDtrackV1(AliTRDseedV1 * const trklts, const Double_t p[5], const Double_t cov[15]
, Double_t x, Double_t alpha) : AliKalmanTrack()
- ,fPIDquality(0)
+ ,fStatus(0)
,fDE(0.)
- ,fBackupTrack(0x0)
+ ,fkReconstructor(NULL)
+ ,fBackupTrack(NULL)
+ ,fTrackLow(NULL)
+ ,fTrackHigh(NULL)
{
//
// The stand alone tracking constructor
Int_t ncls = 0;
for(int iplane=0; iplane<kNplane; iplane++){
fTrackletIndex[iplane] = 0xffff;
- if(!trklts[iplane].IsOK()) fTracklet[iplane] = 0x0;
+ if(!trklts[iplane].IsOK()) fTracklet[iplane] = NULL;
else{
fTracklet[iplane] = &trklts[iplane];
ncls += fTracklet[iplane]->GetN();
//AliInfo("");
//printf("I-AliTRDtrackV1::~AliTRDtrackV1() : Owner[%s]\n", TestBit(kOwner)?"YES":"NO");
- if(fBackupTrack) delete fBackupTrack;
- fBackupTrack = 0x0;
+ if(fBackupTrack) delete fBackupTrack; fBackupTrack = NULL;
+
+ if(fTrackLow) delete fTrackLow; fTrackLow = NULL;
+ if(fTrackHigh) delete fTrackHigh; fTrackHigh = NULL;
for(Int_t ip=0; ip<kNplane; ip++){
if(TestBit(kOwner) && fTracklet[ip]) delete fTracklet[ip];
- fTracklet[ip] = 0x0;
+ fTracklet[ip] = NULL;
fTrackletIndex[ip] = 0xffff;
}
}
Bool_t AliTRDtrackV1::CookLabel(Float_t wrong)
{
// set MC label for this track
-
+ if(!GetNumberOfClusters()) return kFALSE;
+
Int_t s[kMAXCLUSTERSPERTRACK][2];
for (Int_t i = 0; i < kMAXCLUSTERSPERTRACK; i++) {
s[i][0] = -1;
Bool_t labelAdded;
Int_t label;
- AliTRDcluster *c = 0x0;
+ AliTRDcluster *c = NULL;
for (Int_t ip = 0; ip < kNplane; ip++) {
if(fTrackletIndex[ip] == 0xffff) continue;
- for (Int_t ic = 0; ic < AliTRDseed::knTimebins; ic++) {
+ for (Int_t ic = 0; ic < AliTRDseedV1::kNclusters; ic++) {
if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
for (Int_t k = 0; k < 3; k++) {
label = c->GetLabel(k);
max = s[i][1];
label = s[i][0];
}
-
if ((1. - Float_t(max)/GetNumberOfClusters()) > wrong) label = -label;
SetLabel(label);
//_______________________________________________________________
Bool_t AliTRDtrackV1::CookPID()
{
- //
- // Cook the PID information
- //
+//
+// Cook the PID information for the track by delegating the omonim function of the tracklets.
+// Computes the number of tracklets used. The tracklet information are considered independent.
+// For the moment no global track measurement of PID is performed as for example to estimate
+// bremsstrahlung probability based on global chi2 of the track.
+//
+// The status bit AliESDtrack::kTRDpid is set during the call of AliTRDtrackV1::UpdateESDtrack().The PID performance of the
+//TRD for tracks with 6 tacklets is displayed below.
+//Begin_Html
+//<img src="TRD/trackPID.gif">
+//End_Html
+//
- // Reset the a priori probabilities
+ /*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++;
- }
-
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fPID[ispec] = pid;
+
+ UChar_t fPIDquality = SetNumberOfTrackletsPID(kTRUE);
// no tracklet found for PID calculations
- if(!fPIDquality) return kTRUE;
-
- // slot for PID calculation @ track level
+ if(!fPIDquality) return kFALSE;
+ // slot for PID calculation @ track level for bremsstrahlung TODO
// normalize probabilities
Double_t probTotal = 0.0;
return kTRUE;
}
-//_____________________________________________________________________________
-Double_t AliTRDtrackV1::GetBz() const
+//___________________________________________________________
+UChar_t AliTRDtrackV1::GetNumberOfTrackletsPID() const
{
- //
- // Returns Bz component of the magnetic field (kG)
- //
+// Retrieve number of tracklets used for PID calculation.
- if (AliTracker::UniformField()) return AliTracker::GetBz();
+ UChar_t nPID = 0;
+ Float_t *prob = NULL;
+ for(int ip=0; ip<kNplane; ip++){
+ if(fTrackletIndex[ip] == 0xffff) continue;
+ if(!fTracklet[ip]->IsOK()) continue;
+ if(!(prob = fTracklet[ip]->GetProbability(kFALSE))) continue;
+
+ Int_t nspec = 0; // quality check of tracklet dEdx
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++){
+ if(prob[ispec] < 0.) continue;
+ nspec++;
+ }
+ if(!nspec) continue;
+
+ fTracklet[ip]->SetPID();
+ nPID++;
+ }
+ return nPID;
+}
- Double_t r[3];
- GetXYZ(r);
- return AliTracker::GetBz(r);
+//___________________________________________________________
+UChar_t AliTRDtrackV1::SetNumberOfTrackletsPID(Bool_t recalc)
+{
+// Retrieve number of tracklets used for PID calculation. // Recalculated PID at tracklet level by quering the PID DB.
+
+ UChar_t fPIDquality = 0;
+
+ // steer PID calculation @ tracklet level
+ Float_t *prob = NULL;
+ for(int ip=0; ip<kNplane; ip++){
+ if(fTrackletIndex[ip] == 0xffff) continue;
+ if(!fTracklet[ip]->IsOK()) continue;
+ if(!(prob = fTracklet[ip]->GetProbability(recalc))) return 0;
+
+ 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++;
+ }
+ return fPIDquality;
+}
+
+//_______________________________________________________________
+AliTRDcluster* AliTRDtrackV1::GetCluster(Int_t id)
+{
+ // Get the cluster at a certain position in the track
+ 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;
+ }
+ AliTRDcluster *c = NULL;
+ for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
+ if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
+
+ if(n<id){n++; continue;}
+ return c;
+ }
+ }
+ return NULL;
}
//_______________________________________________________________
Int_t AliTRDtrackV1::GetClusterIndex(Int_t id) const
{
+ // Get the cluster index at a certain position in the track
Int_t n = 0;
for(Int_t ip=0; ip<kNplane; ip++){
if(!fTracklet[ip]) continue;
n+=fTracklet[ip]->GetN();
continue;
}
- AliTRDcluster *c = 0x0;
- for(Int_t ic=AliTRDseed::knTimebins-1; ic>=0; ic--){
+ AliTRDcluster *c = NULL;
+ for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
if(n<id){n++; continue;}
}
//_______________________________________________________________
-Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt) const
+Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt, Double_t *cov) const
{
- //
- // Get the predicted chi2
- //
+// Compute chi2 between tracklet and track. The value is calculated at the radial position of the track
+// equal to the reference radial position of the tracklet (see AliTRDseedV1)
+//
+// The chi2 estimator is computed according to the following formula
+// BEGIN_LATEX
+// #chi^{2}=(X_{trklt}-X_{track})(C_{trklt}+C_{track})^{-1}(X_{trklt}-X_{track})^{T}
+// END_LATEX
+// where X=(y z), the position of the track/tracklet in the yz plane
+//
+
+ Double_t p[2] = { trklt->GetY(), trklt->GetZ()};
+ trklt->GetCovAt(trklt->GetX(), cov);
+ return AliExternalTrackParam::GetPredictedChi2(p, cov);
+}
+
+//_______________________________________________________________
+Int_t AliTRDtrackV1::GetSector() const
+{
+ return Int_t(GetAlpha()/AliTRDgeometry::GetAlpha() + (GetAlpha()>0. ? 0 : AliTRDgeometry::kNsector));
+}
+
+//_______________________________________________________________
+Bool_t AliTRDtrackV1::IsEqual(const TObject *o) const
+{
+ // Checks whether two tracks are equal
+ if (!o) return kFALSE;
+ const AliTRDtrackV1 *inTrack = dynamic_cast<const AliTRDtrackV1*>(o);
+ if (!inTrack) return kFALSE;
- Double_t x = trklt->GetX0();
- Double_t p[2] = { trklt->GetYat(x)
- , trklt->GetZat(x) };
- Double_t cov[3];
- trklt->GetCovAt(x, cov);
+ //if ( fPIDquality != inTrack->GetPIDquality() ) return kFALSE;
- return AliExternalTrackParam::GetPredictedChi2(p, cov);
+ for(Int_t i = 0; i < AliPID::kSPECIES; i++){
+ if ( fPID[i] != inTrack->GetPID(i) ) return kFALSE;
+ }
+
+ for (Int_t i = 0; i < 3; i++){
+ if ( fBudget[i] != inTrack->GetBudget(i) ) return kFALSE;
+ }
+ if ( fDE != inTrack->GetEdep() ) return kFALSE;
+ if ( fFakeRatio != inTrack->GetFakeRatio() ) return kFALSE;
+ if ( fChi2 != inTrack->GetChi2() ) return kFALSE;
+ if ( fMass != inTrack->GetMass() ) return kFALSE;
+ if ( fLab != inTrack->GetLabel() ) return kFALSE;
+ if ( fN != inTrack->GetNumberOfClusters() ) return kFALSE;
+ if ( AliKalmanTrack::GetIntegratedLength() != inTrack->GetIntegratedLength() ) return kFALSE;
+
+ if ( GetX() != inTrack->GetX() ) return kFALSE;
+ if ( GetAlpha() != inTrack->GetAlpha() ) return kFALSE;
+ const Double_t *inP = inTrack->GetParameter();
+ const Double_t *curP = GetParameter();
+ for (Int_t i = 0; i < 5; i++){
+ if ( curP[i] != inP[i]) return kFALSE;
+ }
+ const Double_t *inC = inTrack->GetCovariance();
+ const Double_t *curC = GetCovariance();
+ for (Int_t i = 0; i < 15; i++){
+ if ( curC[i] != inC[i]) return kFALSE;
+ }
+
+ for (Int_t iTracklet = 0; iTracklet < kNplane; iTracklet++){
+ AliTRDseedV1 *curTracklet = fTracklet[iTracklet];
+ AliTRDseedV1 *inTracklet = inTrack->GetTracklet(iTracklet);
+ if (curTracklet && inTracklet){
+ if (! curTracklet->IsEqual(inTracklet) ) {
+ curTracklet->Print();
+ inTracklet->Print();
+ return kFALSE;
+ }
+ } else {
+ // if one tracklet exists, and corresponding
+ // in other track doesn't - return kFALSE
+ if(inTracklet || curTracklet) return kFALSE;
+ }
+ }
+
+ return kTRUE;
+}
+
+//_______________________________________________________________
+Bool_t AliTRDtrackV1::IsElectron() const
+{
+ if(GetPID(0) > fkReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
+ return kFALSE;
}
{
//
// Find a prolongation at given x
- // Return 0 if it does not exist
+ // Return -1 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;
+ if (!AliExternalTrackParam::GetYAt(xk,bz,y)) return -1;
+ if (!AliExternalTrackParam::GetZAt(xk,bz,z)) return -1;
return 1;
}
}
- if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0,xrho,GetMass())) {
- return kFALSE;
- }
+ if (!AliExternalTrackParam::CorrectForMeanMaterial(xx0, xrho, GetMass())) return kFALSE;
+
{
Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
Rotate(alpha,kTRUE);
GetXYZ(xyz0);
- GetProlongation(x,y,z);
+ if(GetProlongation(x,y,z)<0) return -1;
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(AliTracker::MeanMaterialBudget(xyz0,xyz1,param)<=0.) return -1;
if (param[1] <= 0) {
param[1] = 100000000;
}
Double_t alpha = TMath::ATan2(xyz0[1],xyz0[0]);
Rotate(alpha,kTRUE);
GetXYZ(xyz0);
- GetProlongation(r,y,z);
+ if(GetProlongation(r,y,z)<0) return -1;
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(AliTracker::MeanMaterialBudget(xyz0,xyz1,param) <= 0.) return -1;
if (param[1] <= 0) {
param[1] = 100000000;
}
+//_____________________________________________________________________________
+void AliTRDtrackV1::Print(Option_t *o) const
+{
+ // Print track status
+ AliInfo(Form("PID [%4.1f %4.1f %4.1f %4.1f %4.1f]", 1.E2*fPID[0], 1.E2*fPID[1], 1.E2*fPID[2], 1.E2*fPID[3], 1.E2*fPID[4]));
+ AliInfo(Form("Material[%5.2f %5.2f %5.2f]", fBudget[0], fBudget[1], fBudget[2]));
+
+ AliInfo(Form("x[%7.2f] t[%7.4f] alpha[%f] mass[%f]", GetX(), GetIntegratedLength(), GetAlpha(), fMass));
+ AliInfo(Form("Ntr[%1d] NtrPID[%1d] Ncl[%3d] lab[%3d]", GetNumberOfTracklets(), GetNumberOfTrackletsPID(), fN, fLab));
+
+ if(strcmp(o, "a")!=0) return;
+ printf("|X| = (");
+ const Double_t *curP = GetParameter();
+ for (Int_t i = 0; i < 5; i++) printf("%7.2f ", curP[i]);
+ printf(")\n");
+
+ printf("|V| = \n");
+ const Double_t *curC = GetCovariance();
+ for (Int_t i = 0, j=4, k=0; i<15; i++, k++){
+ printf("%7.2f ", curC[i]);
+ if(k==j){
+ printf("\n");
+ k=-1; j--;
+ }
+ }
+
+ for(Int_t ip=0; ip<kNplane; ip++){
+ if(!fTracklet[ip]) continue;
+ fTracklet[ip]->Print(o);
+ }
+}
+
+
//_____________________________________________________________________________
Bool_t AliTRDtrackV1::Rotate(Double_t alpha, Bool_t absolute)
{
}
//_______________________________________________________________
-void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *trklt, Int_t index)
+void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *const trklt, Int_t index)
{
//
// Set the tracklets
fTrackletIndex[plane] = index;
}
+//_______________________________________________________________
+void AliTRDtrackV1::SetTrackLow()
+{
+ const AliExternalTrackParam *op = dynamic_cast<const AliExternalTrackParam*>(this);
+ fTrackLow = fTrackLow ? new(fTrackLow) AliExternalTrackParam(*op) : new AliExternalTrackParam(*op);
+}
+
+//_______________________________________________________________
+void AliTRDtrackV1::SetTrackHigh(const AliExternalTrackParam *op)
+{
+ if(!op) op = dynamic_cast<const AliExternalTrackParam*>(this);
+ fTrackHigh = fTrackHigh ? new(fTrackHigh) AliExternalTrackParam(*op) : new AliExternalTrackParam(*op);
+}
+
//_______________________________________________________________
void AliTRDtrackV1::UnsetTracklet(Int_t plane)
{
if(plane<0 && plane >= kNplane) return;
fTrackletIndex[plane] = 0xffff;
- fTracklet[plane] = 0x0;
+ fTracklet[plane] = NULL;
}
//_______________________________________________________________
-Bool_t AliTRDtrackV1::Update(AliTRDseedV1 *trklt, Double_t chisq)
+Bool_t AliTRDtrackV1::Update(Double_t *p, Double_t *cov, Double_t chi2)
{
//
- // Update track and tracklet parameters
+ // Update track
//
-
- Double_t x = trklt->GetX0();
- Double_t p[2] = { trklt->GetYat(x)
- , trklt->GetZat(x) };
- Double_t cov[3];
- trklt->GetCovAt(x, cov);
-
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());
+ SetChi2(GetChi2() + chi2);
return kTRUE;
}
// Update the TRD PID information in the ESD track
//
- track->SetNumberOfTRDslices(kNslice);
-
+ Int_t nslices = fkReconstructor->IsEightSlices() ? (Int_t)AliTRDpidUtil::kNNslices : (Int_t)AliTRDpidUtil::kLQslices;
+ // number of tracklets used for PID calculation
+ UChar_t nPID = GetNumberOfTrackletsPID();
+ // number of tracklets attached to the track
+ UChar_t nTrk = GetNumberOfTracklets();
+ // pack the two numbers together and store them in the ESD
+ track->SetTRDntracklets(nPID | (nTrk<<3));
+ // allocate space to store raw PID signals dEdx & momentum
+ track->SetNumberOfTRDslices((nslices+2)*AliTRDgeometry::kNlayer);
+ // store raw signals
+ Float_t p, sp; Double_t spd;
for (Int_t ip = 0; ip < kNplane; ip++) {
if(fTrackletIndex[ip] == 0xffff) continue;
- if(!fTracklet[ip]->IsOK()) 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);
+ if(!fTracklet[ip]->HasPID()) continue;
+ const Float_t *dedx = fTracklet[ip]->GetdEdx();
+ for (Int_t js = 0; js < nslices; js++, dedx++) track->SetTRDslice(*dedx, ip, js);
+ p = fTracklet[ip]->GetMomentum(&sp); spd = sp;
+ track->SetTRDmomentum(p, ip, &spd);
}
-
- // copy PID to ESD
- if(!fPIDquality) return;
+ // store PID probabilities
track->SetTRDpid(fPID);
- track->SetTRDpidQuality(fPIDquality);
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff