AliTRDtrackV1::AliTRDtrackV1() : AliKalmanTrack()
,fStatus(0)
,fDE(0.)
- ,fReconstructor(0x0)
- ,fBackupTrack(0x0)
- ,fTrackLow(0x0)
- ,fTrackHigh(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)
,fStatus(ref.fStatus)
,fDE(ref.fDE)
- ,fReconstructor(ref.fReconstructor)
- ,fBackupTrack(0x0)
- ,fTrackLow(0x0)
- ,fTrackHigh(0x0)
+ ,fkReconstructor(ref.fkReconstructor)
+ ,fBackupTrack(NULL)
+ ,fTrackLow(NULL)
+ ,fTrackHigh(NULL)
{
//
// Copy constructor
AliTRDtrackV1::AliTRDtrackV1(const AliESDtrack &t) : AliKalmanTrack()
,fStatus(0)
,fDE(0.)
- ,fReconstructor(0x0)
- ,fBackupTrack(0x0)
- ,fTrackLow(0x0)
- ,fTrackHigh(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()
,fStatus(0)
,fDE(0.)
- ,fReconstructor(0x0)
- ,fBackupTrack(0x0)
- ,fTrackLow(0x0)
- ,fTrackHigh(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 = 0x0;
- if(fTrackHigh) delete fTrackHigh; fTrackHigh = 0x0;
+ 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 < AliTRDseedV1::kNclusters; ic++) {
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;
// no tracklet found for PID calculations
if(!fPIDquality) return kFALSE;
- // slot for PID calculation @ track level
+ // slot for PID calculation @ track level for bremsstrahlung TODO
// normalize probabilities
Double_t probTotal = 0.0;
{
// Retrieve number of tracklets used for PID calculation.
- UChar_t fPIDquality = 0;
- Float_t *prob = 0x0;
+ 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))) return 0;
+ 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(!nspec) continue;
- fPIDquality++;
+ fTracklet[ip]->SetPID();
+ nPID++;
}
- return fPIDquality;
+ return nPID;
}
//___________________________________________________________
UChar_t fPIDquality = 0;
// steer PID calculation @ tracklet level
- Float_t *prob = 0x0;
+ Float_t *prob = NULL;
for(int ip=0; ip<kNplane; ip++){
if(fTrackletIndex[ip] == 0xffff) continue;
if(!fTracklet[ip]->IsOK()) continue;
//_______________________________________________________________
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;
n+=fTracklet[ip]->GetN();
continue;
}
- AliTRDcluster *c = 0x0;
+ AliTRDcluster *c = NULL;
for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
return c;
}
}
- return 0x0;
+ 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;
+ AliTRDcluster *c = NULL;
for(Int_t ic=AliTRDseedV1::kNclusters; ic--;){
if(!(c = fTracklet[ip]->GetClusters(ic))) continue;
}
//_______________________________________________________________
-Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt) const
+Double_t AliTRDtrackV1::GetPredictedChi2(const AliTRDseedV1 *trklt, Double_t *cov) const
{
// 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)
// where X=(y z), the position of the track/tracklet in the yz plane
//
- Double_t x = GetX();
- Double_t p[2] = { trklt->GetYat(x), trklt->GetZat(x)};
- Double_t cov[3]; trklt->GetCovAt(x, cov);
+ Double_t p[2] = { trklt->GetY(), trklt->GetZ()};
+ trklt->GetCovAt(trklt->GetX(), cov);
return AliExternalTrackParam::GetPredictedChi2(p, cov);
}
//_______________________________________________________________
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;
//_______________________________________________________________
Bool_t AliTRDtrackV1::IsElectron() const
{
- if(GetPID(0) > fReconstructor->GetRecoParam()->GetPIDThreshold(GetP())) return kTRUE;
+ 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;
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 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;
//_____________________________________________________________________________
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]));
}
//_______________________________________________________________
-void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *trklt, Int_t index)
+void AliTRDtrackV1::SetTracklet(AliTRDseedV1 *const trklt, Int_t index)
{
//
// Set the tracklets
{
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 = GetX();
- Double_t p[2] = { trklt->GetYat(x)
- , trklt->GetZat(x) };
- Double_t cov[3]/*, covR[3], cov0[3]*/;
-
-// printf("\tD[%3d] Ly[%d] Trk: x[%f] y[%f] z[%f]\n", trklt->GetDetector(), trklt->GetPlane(), GetX(), GetY(), GetZ());
-// //
-// Double_t xref = trklt->GetXref();
-// trklt->GetCovAt(xref, covR);
-// printf("xr=%5.3f y=%f+-%f z=%f+-%f (covYZ=%f)\n", xref, trklt->GetYat(xref), TMath::Sqrt(covR[0]), trklt->GetZat(xref), TMath::Sqrt(covR[2]), covR[1]);
-//
-// Double_t x0 = trklt->GetX0();
-// trklt->GetCovAt(x0, cov0);
-// printf("x0=%5.3f y=%f+-%f z=%f+-%f (covYZ=%f)\n", x0, trklt->GetYat(x0), TMath::Sqrt(cov0[0]), trklt->GetZat(x0), TMath::Sqrt(cov0[2]), cov0[1]);
-//
-// trklt->GetCovAt(x, cov);
-// printf("x =%5.3f y=%f+-%f z=%f+-%f (covYZ=%f)\n", x, p[0], TMath::Sqrt(cov[0]), p[1], TMath::Sqrt(cov[2]), cov[1]);
-//
-// const Double_t *cc = GetCovariance();
-// printf("yklm[0] = %f +- %f\n", GetY(), TMath::Sqrt(cc[0]));
-
- trklt->GetCovAt(x, cov);
if(!AliExternalTrackParam::Update(p, cov)) return kFALSE;
-// cc = GetCovariance();
-// printf("yklm[1] = %f +- %f\n", GetY(), TMath::Sqrt(cc[0]));
- 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);
+ SetChi2(GetChi2() + chi2);
return kTRUE;
}
// Update the TRD PID information in the ESD track
//
- Int_t nslices = fReconstructor->IsEightSlices() ? (Int_t)AliTRDpidUtil::kNNslices : (Int_t)AliTRDpidUtil::kLQslices;
- track->SetNumberOfTRDslices(nslices);
-
- Int_t n = 0;
+ Int_t nslices = fkReconstructor->GetRecoParam()->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;
- n++;
- if(!fTracklet[ip]->IsOK()) continue;
- fTracklet[ip]->CookdEdx(nslices);
- Float_t *dedx = fTracklet[ip]->GetdEdx();
+ 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);
}
-
- UChar_t nPID = GetNumberOfTrackletsPID();
- if(!nPID) track->SetTRDntracklets(n);
- else {
- track->SetTRDpid(fPID);
- n |= (nPID<<3);
- track->SetTRDntracklets(n);
- }
+ // store PID probabilities
+ track->SetTRDpid(fPID);
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff