/* $Id$ */
////////////////////////////////////////////////////////////////////////////
-// //
-// The TRD track seed //
-// //
+////
+// The TRD offline tracklet
+//
+// The running horse of the TRD reconstruction. The following tasks are preformed:
+// 1. Clusters attachment to tracks based on prior information stored at tracklet level (see AttachClusters)
+// 2. Clusters position recalculation based on track information (see GetClusterXY and Fit)
+// 3. Cluster error parametrization recalculation (see Fit)
+// 4. Linear track approximation (Fit)
+// 5. Optimal position (including z estimate for pad row cross tracklets) and covariance matrix of the track fit inside one TRD chamber (Fit)
+// 6. Tilt pad correction and systematic effects (GetCovAt)
+// 7. dEdx calculation (CookdEdx)
+// 8. PID probabilities estimation (CookPID)
+//
// Authors: //
// Alex Bercuci <A.Bercuci@gsi.de> //
// Markus Fasel <M.Fasel@gsi.de> //
#include "AliTRDchamberTimeBin.h"
#include "AliTRDtrackingChamber.h"
#include "AliTRDtrackerV1.h"
-#include "AliTRDReconstructor.h"
#include "AliTRDrecoParam.h"
#include "AliTRDCommonParam.h"
ClassImp(AliTRDseedV1)
+TLinearFitter *AliTRDseedV1::fgFitterY = NULL;
+TLinearFitter *AliTRDseedV1::fgFitterZ = NULL;
+
//____________________________________________________________________
AliTRDseedV1::AliTRDseedV1(Int_t det)
- :TObject()
- ,fReconstructor(0x0)
- ,fClusterIter(0x0)
+ :AliTRDtrackletBase()
+ ,fkReconstructor(NULL)
+ ,fClusterIter(NULL)
,fExB(0.)
,fVD(0.)
,fT0(0.)
,fDiffL(0.)
,fDiffT(0.)
,fClusterIdx(0)
-// ,fUsable(0)
- ,fN2(0)
- ,fNUsed(0)
+ ,fErrorMsg(0)
+ ,fN(0)
,fDet(det)
- ,fTilt(0.)
- ,fPadLength(0.)
- ,fMom(0.)
+ ,fPt(0.)
,fdX(0.)
,fX0(0.)
,fX(0.)
//
// Constructor
//
- for(Int_t ic=kNTimeBins; ic--;) fIndexes[ic] = -1;
- memset(fClusters, 0, kNTimeBins*sizeof(AliTRDcluster*));
+ memset(fIndexes,0xFF,kNclusters*sizeof(fIndexes[0]));
+ memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
+ memset(fPad, 0, 3*sizeof(Float_t));
fYref[0] = 0.; fYref[1] = 0.;
fZref[0] = 0.; fZref[1] = 0.;
fYfit[0] = 0.; fYfit[1] = 0.;
fZfit[0] = 0.; fZfit[1] = 0.;
- memset(fdEdx, 0, kNSlices*sizeof(Float_t));
+ memset(fdEdx, 0, kNslices*sizeof(Float_t));
for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels
fLabels[2]=0; // number of different labels for tracklet
- fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.;
+ memset(fRefCov, 0, 7*sizeof(Double_t));
// covariance matrix [diagonal]
// default sy = 200um and sz = 2.3 cm
fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3;
//____________________________________________________________________
AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &ref)
- :TObject((TObject&)ref)
- ,fReconstructor(0x0)
- ,fClusterIter(0x0)
+ :AliTRDtrackletBase((AliTRDtrackletBase&)ref)
+ ,fkReconstructor(NULL)
+ ,fClusterIter(NULL)
,fExB(0.)
,fVD(0.)
,fT0(0.)
,fDiffL(0.)
,fDiffT(0.)
,fClusterIdx(0)
-// ,fUsable(0)
- ,fN2(0)
- ,fNUsed(0)
+ ,fErrorMsg(0)
+ ,fN(0)
,fDet(-1)
- ,fTilt(0.)
- ,fPadLength(0.)
- ,fMom(0.)
+ ,fPt(0.)
,fdX(0.)
,fX0(0.)
,fX(0.)
//printf("I-AliTRDseedV1::~AliTRDseedV1() : Owner[%s]\n", IsOwner()?"YES":"NO");
if(IsOwner()) {
- for(int itb=0; itb<kNTimeBins; itb++){
+ for(int itb=0; itb<kNclusters; itb++){
if(!fClusters[itb]) continue;
//AliInfo(Form("deleting c %p @ %d", fClusters[itb], itb));
delete fClusters[itb];
- fClusters[itb] = 0x0;
+ fClusters[itb] = NULL;
}
}
}
//AliInfo("");
AliTRDseedV1 &target = (AliTRDseedV1 &)ref;
- target.fReconstructor = fReconstructor;
- target.fClusterIter = 0x0;
+ target.fkReconstructor = fkReconstructor;
+ target.fClusterIter = NULL;
target.fExB = fExB;
target.fVD = fVD;
target.fT0 = fT0;
target.fDiffL = fDiffL;
target.fDiffT = fDiffT;
target.fClusterIdx = 0;
-// target.fUsable = fUsable;
- target.fN2 = fN2;
- target.fNUsed = fNUsed;
+ target.fErrorMsg = fErrorMsg;
+ target.fN = fN;
target.fDet = fDet;
- target.fTilt = fTilt;
- target.fPadLength = fPadLength;
- target.fMom = fMom;
+ target.fPt = fPt;
target.fdX = fdX;
target.fX0 = fX0;
target.fX = fX;
target.fC = fC;
target.fChi2 = fChi2;
- memcpy(target.fIndexes, fIndexes, kNTimeBins*sizeof(Int_t));
- memcpy(target.fClusters, fClusters, kNTimeBins*sizeof(AliTRDcluster*));
+ memcpy(target.fIndexes, fIndexes, kNclusters*sizeof(Int_t));
+ memcpy(target.fClusters, fClusters, kNclusters*sizeof(AliTRDcluster*));
+ memcpy(target.fPad, fPad, 3*sizeof(Float_t));
target.fYref[0] = fYref[0]; target.fYref[1] = fYref[1];
target.fZref[0] = fZref[0]; target.fZref[1] = fZref[1];
target.fYfit[0] = fYfit[0]; target.fYfit[1] = fYfit[1];
target.fZfit[0] = fZfit[0]; target.fZfit[1] = fZfit[1];
- memcpy(target.fdEdx, fdEdx, kNSlices*sizeof(Float_t));
+ memcpy(target.fdEdx, fdEdx, kNslices*sizeof(Float_t));
memcpy(target.fProb, fProb, AliPID::kSPECIES*sizeof(Float_t));
memcpy(target.fLabels, fLabels, 3*sizeof(Int_t));
- memcpy(target.fRefCov, fRefCov, 3*sizeof(Double_t));
+ memcpy(target.fRefCov, fRefCov, 7*sizeof(Double_t));
memcpy(target.fCov, fCov, 3*sizeof(Double_t));
TObject::Copy(ref);
Double_t y, z;
if(!track->GetProlongation(fX0, y, z)) return kFALSE;
- UpDate(track);
+ Update(track);
return kTRUE;
}
//_____________________________________________________________________________
-void AliTRDseedV1::Reset()
+void AliTRDseedV1::Reset(Option_t *opt)
{
- //
- // Reset seed
- //
+//
+// Reset seed. If option opt="c" is given only cluster arrays are cleared.
+//
+ for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1;
+ memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
+ fN=0;
+ if(strcmp(opt, "c")==0) return;
+
fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.;
fDiffL=0.;fDiffT=0.;
- fClusterIdx=0;//fUsable=0;
- fN2=0; fNUsed=0;
- fDet=-1;fTilt=0.;fPadLength=0.;
- fMom=0.;
+ fClusterIdx=0;
+ fErrorMsg = 0;
+ fDet=-1;
+ fPt=0.;
fdX=0.;fX0=0.; fX=0.; fY=0.; fZ=0.;
fS2Y=0.; fS2Z=0.;
fC=0.; fChi2 = 0.;
- for(Int_t ic=kNTimeBins; ic--;) fIndexes[ic] = -1;
- memset(fClusters, 0, kNTimeBins*sizeof(AliTRDcluster*));
+ memset(fPad, 0, 3*sizeof(Float_t));
fYref[0] = 0.; fYref[1] = 0.;
fZref[0] = 0.; fZref[1] = 0.;
fYfit[0] = 0.; fYfit[1] = 0.;
fZfit[0] = 0.; fZfit[1] = 0.;
- memset(fdEdx, 0, kNSlices*sizeof(Float_t));
+ memset(fdEdx, 0, kNslices*sizeof(Float_t));
for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels
fLabels[2]=0; // number of different labels for tracklet
- fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.;
+ memset(fRefCov, 0, 7*sizeof(Double_t));
// covariance matrix [diagonal]
// default sy = 200um and sz = 2.3 cm
fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3;
}
//____________________________________________________________________
-void AliTRDseedV1::UpDate(const AliTRDtrackV1 *trk)
+void AliTRDseedV1::Update(const AliTRDtrackV1 *trk)
{
// update tracklet reference position from the TRD track
- // Funny name to avoid the clash with the function AliTRDseed::Update() (has to be made obselete)
Double_t fSnp = trk->GetSnp();
Double_t fTgl = trk->GetTgl();
- fMom = trk->GetP();
- fYref[1] = fSnp/(1. - fSnp*fSnp);
- fZref[1] = fTgl;
+ fPt = trk->Pt();
+ Double_t norm =1./TMath::Sqrt(1. - fSnp*fSnp);
+ fYref[1] = fSnp*norm;
+ fZref[1] = fTgl*norm;
SetCovRef(trk->GetCovariance());
Double_t dx = trk->GetX() - fX0;
// Calculate number of used clusers in the tracklet
//
- fNUsed = 0;
- for (Int_t i = kNTimeBins; i--; ) {
+ Int_t nused = 0, nshared = 0;
+ for (Int_t i = kNclusters; i--; ) {
if (!fClusters[i]) continue;
- if(fClusters[i]->IsUsed()) fNUsed++;
- else if(fClusters[i]->IsShared() && IsStandAlone()) fNUsed++;
+ if(fClusters[i]->IsUsed()){
+ nused++;
+ } else if(fClusters[i]->IsShared()){
+ if(IsStandAlone()) nused++;
+ else nshared++;
+ }
}
+ SetNUsed(nused);
+ SetNShared(nshared);
}
//_____________________________________________________________________________
// - Clusters which are attached to a kink track become shared
//
AliTRDcluster **c = &fClusters[0];
- for (Int_t ic=kNTimeBins; ic--; c++) {
+ for (Int_t ic=kNclusters; ic--; c++) {
if(!(*c)) continue;
if(IsStandAlone()){
if((*c)->IsShared() || (*c)->IsUsed()){
- (*c) = 0x0;
+ if((*c)->IsShared()) SetNShared(GetNShared()-1);
+ else SetNUsed(GetNUsed()-1);
+ (*c) = NULL;
fIndexes[ic] = -1;
- fN2--;
- continue;
+ SetN(GetN()-1);
+ continue;
}
- }
- else{
+ } else {
if((*c)->IsUsed() || IsKink()){
- (*c)->SetShared();
- continue;
+ (*c)->SetShared();
+ continue;
}
}
(*c)->Use();
// 3. cluster size
//
- Int_t nclusters[kNSlices];
- memset(nclusters, 0, kNSlices*sizeof(Int_t));
- memset(fdEdx, 0, kNSlices*sizeof(Float_t));
+ Int_t nclusters[kNslices];
+ memset(nclusters, 0, kNslices*sizeof(Int_t));
+ memset(fdEdx, 0, kNslices*sizeof(Float_t));
const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
- AliTRDcluster *c = 0x0;
+ AliTRDcluster *c = NULL;
for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){
if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue;
Float_t dx = TMath::Abs(fX0 - c->GetX());
// 2. take sharing into account
- Float_t w = c->IsShared() ? .5 : 1.;
+ Float_t w = /*c->IsShared() ? .5 :*/ 1.;
// 3. take into account large clusters TODO
//w *= c->GetNPads() > 3 ? .8 : 1.;
nclusters[slice]++;
} // End of loop over clusters
- //if(fReconstructor->GetPIDMethod() == AliTRDReconstructor::kLQPID){
+ //if(fkReconstructor->GetPIDMethod() == AliTRDReconstructor::kLQPID){
if(nslices == AliTRDpidUtil::kLQslices){
// calculate mean charge per slice (only LQ PID)
for(int is=0; is<nslices; is++){
Int_t labels[200];
Int_t out[200];
Int_t nlab = 0;
- for (Int_t i = 0; i < kNTimeBins; i++) {
+ for (Int_t i = 0; i < kNclusters; i++) {
if (!fClusters[i]) continue;
for (Int_t ilab = 0; ilab < 3; ilab++) {
if (fClusters[i]->GetLabel(ilab) >= 0) {
//____________________________________________________________________
-void AliTRDseedV1::GetClusterXY(const AliTRDcluster *c, Double_t &x, Double_t &y)
-{
-// Return corrected position of the cluster taking into
-// account variation of the drift velocity with drift length.
-
-
- // drift velocity correction TODO to be moved to the clusterizer
- const Float_t cx[] = {
- -9.6280e-02, 1.3091e-01,-1.7415e-02,-9.9221e-02,-1.2040e-01,-9.5493e-02,
- -5.0041e-02,-1.6726e-02, 3.5756e-03, 1.8611e-02, 2.6378e-02, 3.3823e-02,
- 3.4811e-02, 3.5282e-02, 3.5386e-02, 3.6047e-02, 3.5201e-02, 3.4384e-02,
- 3.2864e-02, 3.1932e-02, 3.2051e-02, 2.2539e-02,-2.5154e-02,-1.2050e-01,
- -1.2050e-01
- };
-
- // PRF correction TODO to be replaced by the gaussian
- // approximation with full error parametrization and // moved to the clusterizer
- const Float_t cy[AliTRDgeometry::kNlayer][3] = {
- { 4.014e-04, 8.605e-03, -6.880e+00},
- {-3.061e-04, 9.663e-03, -6.789e+00},
- { 1.124e-03, 1.105e-02, -6.825e+00},
- {-1.527e-03, 1.231e-02, -6.777e+00},
- { 2.150e-03, 1.387e-02, -6.783e+00},
- {-1.296e-03, 1.486e-02, -6.825e+00}
- };
-
- Int_t ily = AliTRDgeometry::GetLayer(c->GetDetector());
- x = c->GetX() - cx[c->GetLocalTimeBin()];
- y = c->GetY() + cy[ily][0] + cy[ily][1] * TMath::Sin(cy[ily][2] * c->GetCenter());
- return;
-}
-
-//____________________________________________________________________
-Float_t AliTRDseedV1::GetdQdl(Int_t ic) const
+Float_t AliTRDseedV1::GetdQdl(Int_t ic, Float_t *dl) const
{
// Using the linear approximation of the track inside one TRD chamber (TRD tracklet)
// the charge per unit length can be written as:
// BEGIN_LATEX
-// #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dy}{dx}}^{2}_{ref}}}
+// #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dz}{dx}}^{2}_{ref}}}
// END_LATEX
// where qc is the total charge collected in the current time bin and dx is the length
-// of the time bin. For the moment (Jan 20 2009) only pad row cross corrections are
-// considered for the charge but none are applied for drift velocity variations along
-// the drift region or assymetry of the TRF
+// of the time bin.
+// The following correction are applied :
+// - charge : pad row cross corrections
+// [diffusion and TRF assymetry] TODO
+// - dx : anisochronity, track inclination - see Fit and AliTRDcluster::GetXloc()
+// and AliTRDcluster::GetYloc() for the effects taken into account
//
+//Begin_Html
+//<img src="TRD/trackletDQDT.gif">
+//End_Html
+// In the picture the energy loss measured on the tracklet as a function of drift time [left] and respectively
+// drift length [right] for different particle species is displayed.
// Author : Alex Bercuci <A.Bercuci@gsi.de>
//
Float_t dq = 0.;
- if(fClusters[ic]) dq += TMath::Abs(fClusters[ic]->GetQ());
- if(fClusters[ic+kNtb]) dq += TMath::Abs(fClusters[ic+kNtb]->GetQ());
- if(dq<1.e-3 || fdX < 1.e-3) return 0.;
+ // check whether both clusters are inside the chamber
+ Bool_t hasClusterInChamber = kFALSE;
+ if(fClusters[ic] && fClusters[ic]->IsInChamber()){
+ hasClusterInChamber = kTRUE;
+ dq += TMath::Abs(fClusters[ic]->GetQ());
+ }else if(fClusters[ic+kNtb] && fClusters[ic+kNtb]->IsInChamber()){
+ hasClusterInChamber = kTRUE;
+ dq += TMath::Abs(fClusters[ic+kNtb]->GetQ());
+ }
+ if(!hasClusterInChamber) return 0.;
+ if(dq<1.e-3) return 0.;
+
+ Double_t dx = fdX;
+ if(ic-1>=0 && ic+1<kNtb){
+ Float_t x2(0.), x1(0.);
+ // try to estimate upper radial position (find the cluster which is inside the chamber)
+ if(fClusters[ic-1] && fClusters[ic-1]->IsInChamber()) x2 = fClusters[ic-1]->GetX();
+ else if(fClusters[ic-1+kNtb] && fClusters[ic-1+kNtb]->IsInChamber()) x2 = fClusters[ic-1+kNtb]->GetX();
+ else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x2 = fClusters[ic]->GetX()+fdX;
+ else x2 = fClusters[ic+kNtb]->GetX()+fdX;
+ // try to estimate lower radial position (find the cluster which is inside the chamber)
+ if(fClusters[ic+1] && fClusters[ic+1]->IsInChamber()) x1 = fClusters[ic+1]->GetX();
+ else if(fClusters[ic+1+kNtb] && fClusters[ic+1+kNtb]->IsInChamber()) x1 = fClusters[ic+1+kNtb]->GetX();
+ else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x1 = fClusters[ic]->GetX()-fdX;
+ else x1 = fClusters[ic+kNtb]->GetX()-fdX;
+
+ dx = .5*(x2 - x1);
+ }
+ dx *= TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]);
+ if(dl) (*dl) = dx;
+ return dq/dx;
+}
+
+//____________________________________________________________
+Float_t AliTRDseedV1::GetMomentum(Float_t *err) const
+{
+// Returns momentum of the track after update with the current tracklet as:
+// BEGIN_LATEX
+// p=#frac{1}{1/p_{t}} #sqrt{1+tgl^{2}}
+// END_LATEX
+// and optionally the momentum error (if err is not null).
+// The estimated variance of the momentum is given by:
+// BEGIN_LATEX
+// #sigma_{p}^{2} = (#frac{dp}{dp_{t}})^{2} #sigma_{p_{t}}^{2}+(#frac{dp}{dtgl})^{2} #sigma_{tgl}^{2}+2#frac{dp}{dp_{t}}#frac{dp}{dtgl} cov(tgl,1/p_{t})
+// END_LATEX
+// which can be simplified to
+// BEGIN_LATEX
+// #sigma_{p}^{2} = p^{2}p_{t}^{4}tgl^{2}#sigma_{tgl}^{2}-2p^{2}p_{t}^{3}tgl cov(tgl,1/p_{t})+p^{2}p_{t}^{2}#sigma_{1/p_{t}}^{2}
+// END_LATEX
+//
- return dq/fdX/TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]);
+ Double_t p = fPt*TMath::Sqrt(1.+fZref[1]*fZref[1]);
+ Double_t p2 = p*p;
+ Double_t tgl2 = fZref[1]*fZref[1];
+ Double_t pt2 = fPt*fPt;
+ if(err){
+ Double_t s2 =
+ p2*tgl2*pt2*pt2*fRefCov[4]
+ -2.*p2*fZref[1]*fPt*pt2*fRefCov[5]
+ +p2*pt2*fRefCov[6];
+ (*err) = TMath::Sqrt(s2);
+ }
+ return p;
}
+
//____________________________________________________________________
-Float_t* AliTRDseedV1::GetProbability()
+Float_t* AliTRDseedV1::GetProbability(Bool_t force)
{
+ if(!force) return &fProb[0];
+ if(!CookPID()) return NULL;
+ return &fProb[0];
+}
+
+//____________________________________________________________
+Bool_t AliTRDseedV1::CookPID()
+{
// Fill probability array for tracklet from the DB.
//
// Parameters
//
// Output
-// returns pointer to the probability array and 0x0 if missing DB access
+// returns pointer to the probability array and NULL if missing DB access
//
-// Detailed description
+// Retrieve PID probabilities for e+-, mu+-, K+-, pi+- and p+- from the DB according to tracklet information:
+// - estimated momentum at tracklet reference point
+// - dE/dx measurements
+// - tracklet length
+// - TRD layer
+// According to the steering settings specified in the reconstruction one of the following methods are used
+// - Neural Network [default] - option "nn"
+// - 2D Likelihood - option "!nn"
-
- // retrive calibration db
AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
if (!calibration) {
AliError("No access to calibration data");
- return 0x0;
+ return kFALSE;
}
- if (!fReconstructor) {
+ if (!fkReconstructor) {
AliError("Reconstructor not set.");
- return 0x0;
+ return kFALSE;
}
// Retrieve the CDB container class with the parametric detector response
- const AliTRDCalPID *pd = calibration->GetPIDObject(fReconstructor->GetPIDMethod());
+ const AliTRDCalPID *pd = calibration->GetPIDObject(fkReconstructor->GetPIDMethod());
if (!pd) {
AliError("No access to AliTRDCalPID object");
- return 0x0;
+ return kFALSE;
}
- //AliInfo(Form("Method[%d] : %s", fReconstructor->GetRecoParam() ->GetPIDMethod(), pd->IsA()->GetName()));
+ //AliInfo(Form("Method[%d] : %s", fkReconstructor->GetRecoParam() ->GetPIDMethod(), pd->IsA()->GetName()));
// calculate tracklet length TO DO
Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
/// TMath::Sqrt((1.0 - fSnp[iPlane]*fSnp[iPlane]) / (1.0 + fTgl[iPlane]*fTgl[iPlane]));
//calculate dE/dx
- CookdEdx(fReconstructor->GetNdEdxSlices());
+ CookdEdx(fkReconstructor->GetNdEdxSlices());
// Sets the a priori probabilities
- for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
- fProb[ispec] = pd->GetProbability(ispec, fMom, &fdEdx[0], length, GetPlane());
- }
-
- return &fProb[0];
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++)
+ fProb[ispec] = pd->GetProbability(ispec, GetMomentum(), &fdEdx[0], length, GetPlane());
+
+ return kTRUE;
}
//____________________________________________________________________
// Returns a quality measurement of the current seed
//
- Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.;
+ Float_t zcorr = kZcorr ? GetTilt() * (fZfit[0] - fZref[0]) : 0.;
return
- .5 * TMath::Abs(18.0 - fN2)
+ .5 * TMath::Abs(18.0 - GetN())
+ 10.* TMath::Abs(fYfit[1] - fYref[1])
+ 5. * TMath::Abs(fYfit[0] - fYref[0] + zcorr)
- + 2. * TMath::Abs(fZfit[0] - fZref[0]) / fPadLength;
+ + 2. * TMath::Abs(fZfit[0] - fZref[0]) / GetPadLength();
}
//____________________________________________________________________
Double_t xr = fX0-x;
Double_t sy2 = fCov[0] +2.*xr*fCov[1] + xr*xr*fCov[2];
- Double_t sz2 = fPadLength*fPadLength/12.;
+ Double_t sz2 = fS2Z;
+ //GetPadLength()*GetPadLength()/12.;
// insert systematic uncertainties
- Double_t sys[15];
- fReconstructor->GetRecoParam()->GetSysCovMatrix(sys);
- sy2 += sys[0];
- sz2 += sys[1];
-
+ if(fkReconstructor){
+ Double_t sys[15]; memset(sys, 0, 15*sizeof(Double_t));
+ fkReconstructor->GetRecoParam()->GetSysCovMatrix(sys);
+ sy2 += sys[0];
+ sz2 += sys[1];
+ }
// rotate covariance matrix
- Double_t t2 = fTilt*fTilt;
+ Double_t t2 = GetTilt()*GetTilt();
Double_t correction = 1./(1. + t2);
cov[0] = (sy2+t2*sz2)*correction;
- cov[1] = fTilt*(sz2 - sy2)*correction;
+ cov[1] = GetTilt()*(sz2 - sy2)*correction;
cov[2] = (t2*sy2+sz2)*correction;
+
+ //printf("C(%6.1f %+6.3f %6.1f) [%s]\n", 1.e4*TMath::Sqrt(cov[0]), cov[1], 1.e4*TMath::Sqrt(cov[2]), IsRowCross()?" RC ":"-");
+}
+
+//____________________________________________________________
+Double_t AliTRDseedV1::GetCovSqrt(const Double_t * const c, Double_t *d)
+{
+// Helper function to calculate the square root of the covariance matrix.
+// The input matrix is stored in the vector c and the result in the vector d.
+// Both arrays have to be initialized by the user with at least 3 elements. Return negative in case of failure.
+//
+// For calculating the square root of the symmetric matrix c
+// the following relation is used:
+// BEGIN_LATEX
+// C^{1/2} = VD^{1/2}V^{-1}
+// END_LATEX
+// with V being the matrix with the n eigenvectors as columns.
+// In case C is symmetric the followings are true:
+// - matrix D is diagonal with the diagonal given by the eigenvalues of C
+// - V = V^{-1}
+//
+// Author A.Bercuci <A.Bercuci@gsi.de>
+// Date Mar 19 2009
+
+ Double_t l[2], // eigenvalues
+ v[3]; // eigenvectors
+ // the secular equation and its solution :
+ // (c[0]-L)(c[2]-L)-c[1]^2 = 0
+ // L^2 - L*Tr(c)+DET(c) = 0
+ // L12 = [Tr(c) +- sqrt(Tr(c)^2-4*DET(c))]/2
+ Double_t tr = c[0]+c[2], // trace
+ det = c[0]*c[2]-c[1]*c[1]; // determinant
+ if(TMath::Abs(det)<1.e-20) return -1.;
+ Double_t dd = TMath::Sqrt(tr*tr - 4*det);
+ l[0] = .5*(tr + dd);
+ l[1] = .5*(tr - dd);
+ if(l[0]<0. || l[1]<0.) return -1.;
+
+ // the sym V matrix
+ // | v00 v10|
+ // | v10 v11|
+ Double_t tmp = (l[0]-c[0])/c[1];
+ v[0] = TMath::Sqrt(1./(tmp*tmp+1));
+ v[1] = tmp*v[0];
+ v[2] = v[1]*c[1]/(l[1]-c[2]);
+ // the VD^{1/2}V is:
+ l[0] = TMath::Sqrt(l[0]); l[1] = TMath::Sqrt(l[1]);
+ d[0] = v[0]*v[0]*l[0]+v[1]*v[1]*l[1];
+ d[1] = v[0]*v[1]*l[0]+v[1]*v[2]*l[1];
+ d[2] = v[1]*v[1]*l[0]+v[2]*v[2]*l[1];
+
+ return 1.;
}
+//____________________________________________________________
+Double_t AliTRDseedV1::GetCovInv(const Double_t * const c, Double_t *d)
+{
+// Helper function to calculate the inverse of the covariance matrix.
+// The input matrix is stored in the vector c and the result in the vector d.
+// Both arrays have to be initialized by the user with at least 3 elements
+// The return value is the determinant or 0 in case of singularity.
+//
+// Author A.Bercuci <A.Bercuci@gsi.de>
+// Date Mar 19 2009
+
+ Double_t det = c[0]*c[2] - c[1]*c[1];
+ if(TMath::Abs(det)<1.e-20) return 0.;
+ Double_t invDet = 1./det;
+ d[0] = c[2]*invDet;
+ d[1] =-c[1]*invDet;
+ d[2] = c[0]*invDet;
+ return det;
+}
+
+//____________________________________________________________________
+UShort_t AliTRDseedV1::GetVolumeId() const
+{
+ Int_t ic=0;
+ while(ic<kNclusters && !fClusters[ic]) ic++;
+ return fClusters[ic] ? fClusters[ic]->GetVolumeId() : 0;
+}
+
+//____________________________________________________________________
+TLinearFitter* AliTRDseedV1::GetFitterY()
+{
+ if(!fgFitterY) fgFitterY = new TLinearFitter(1, "pol1");
+ fgFitterY->ClearPoints();
+ return fgFitterY;
+}
+
+//____________________________________________________________________
+TLinearFitter* AliTRDseedV1::GetFitterZ()
+{
+ if(!fgFitterZ) fgFitterZ = new TLinearFitter(1, "pol1");
+ fgFitterZ->ClearPoints();
+ return fgFitterZ;
+}
//____________________________________________________________________
void AliTRDseedV1::Calibrate()
Int_t col = 70, row = 7;
AliTRDcluster **c = &fClusters[0];
- if(fN2){
+ if(GetN()){
Int_t ic = 0;
- while (ic<kNTimeBins && !(*c)){ic++; c++;}
+ while (ic<kNclusters && !(*c)){ic++; c++;}
if(*c){
col = (*c)->GetPadCol();
row = (*c)->GetPadRow();
}
}
- fT0 = t0Det->GetValue(fDet) + t0ROC->GetValue(col,row);
+ fT0 = (t0Det->GetValue(fDet) + t0ROC->GetValue(col,row)) / AliTRDCommonParam::Instance()->GetSamplingFrequency();
fVD = vdDet->GetValue(fDet) * vdROC->GetValue(col, row);
fS2PRF = calib->GetPRFWidth(fDet, col, row); fS2PRF *= fS2PRF;
fExB = AliTRDCommonParam::Instance()->GetOmegaTau(fVD);
//AliInfo(Form("own [%s] fOwner[%s]", own?"YES":"NO", fOwner?"YES":"NO"));
if(TestBit(kOwner)) return;
- for(int ic=0; ic<kNTimeBins; ic++){
+ for(int ic=0; ic<kNclusters; ic++){
if(!fClusters[ic]) continue;
fClusters[ic] = new AliTRDcluster(*fClusters[ic]);
}
SetBit(kOwner);
}
-// //____________________________________________________________________
-// Bool_t AliTRDseedV1::AttachClustersIter(AliTRDtrackingChamber *chamber, Float_t quality, Bool_t kZcorr, AliTRDcluster *c)
-// {
-// //
-// // Iterative process to register clusters to the seed.
-// // In iteration 0 we try only one pad-row and if quality not
-// // sufficient we try 2 pad-rows (about 5% of tracks cross 2 pad-rows)
-// //
-// // debug level 7
-// //
-//
-// if(!fReconstructor->GetRecoParam() ){
-// AliError("Seed can not be used without a valid RecoParam.");
-// return kFALSE;
-// }
-//
-// AliTRDchamberTimeBin *layer = 0x0;
-// if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7){
-// AliTRDtrackingChamber ch(*chamber);
-// ch.SetOwner();
-// TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker);
-// cstreamer << "AttachClustersIter"
-// << "chamber.=" << &ch
-// << "tracklet.=" << this
-// << "\n";
-// }
-//
-// Float_t tquality;
-// Double_t kroady = fReconstructor->GetRecoParam() ->GetRoad1y();
-// Double_t kroadz = fPadLength * .5 + 1.;
-//
-// // initialize configuration parameters
-// Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.;
-// Int_t niter = kZcorr ? 1 : 2;
-//
-// Double_t yexp, zexp;
-// Int_t ncl = 0;
-// // start seed update
-// for (Int_t iter = 0; iter < niter; iter++) {
-// ncl = 0;
-// for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
-// if(!(layer = chamber->GetTB(iTime))) continue;
-// if(!Int_t(*layer)) continue;
-//
-// // define searching configuration
-// Double_t dxlayer = layer->GetX() - fX0;
-// if(c){
-// zexp = c->GetZ();
-// //Try 2 pad-rows in second iteration
-// if (iter > 0) {
-// zexp = fZref[0] + fZref[1] * dxlayer - zcorr;
-// if (zexp > c->GetZ()) zexp = c->GetZ() + fPadLength*0.5;
-// if (zexp < c->GetZ()) zexp = c->GetZ() - fPadLength*0.5;
-// }
-// } else zexp = fZref[0] + (kZcorr ? fZref[1] * dxlayer : 0.);
-// yexp = fYref[0] + fYref[1] * dxlayer - zcorr;
-//
-// // Get and register cluster
-// Int_t index = layer->SearchNearestCluster(yexp, zexp, kroady, kroadz);
-// if (index < 0) continue;
-// AliTRDcluster *cl = (*layer)[index];
-//
-// fIndexes[iTime] = layer->GetGlobalIndex(index);
-// fClusters[iTime] = cl;
-// // fY[iTime] = cl->GetY();
-// // fZ[iTime] = cl->GetZ();
-// ncl++;
-// }
-// if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d ncl [%d] = %d", iter, fDet, ncl));
-//
-// if(ncl>1){
-// // calculate length of the time bin (calibration aware)
-// Int_t irp = 0; Float_t x[2]={0., 0.}; Int_t tb[2] = {0,0};
-// for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
-// if(!fClusters[iTime]) continue;
-// x[irp] = fClusters[iTime]->GetX();
-// tb[irp] = iTime;
-// irp++;
-// if(irp==2) break;
-// }
-// Int_t dtb = tb[1] - tb[0];
-// fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
-//
-// // update X0 from the clusters (calibration/alignment aware)
-// for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
-// if(!(layer = chamber->GetTB(iTime))) continue;
-// if(!layer->IsT0()) continue;
-// if(fClusters[iTime]){
-// fX0 = fClusters[iTime]->GetX();
-// break;
-// } else { // we have to infere the position of the anode wire from the other clusters
-// for (Int_t jTime = iTime+1; jTime < AliTRDtrackerV1::GetNTimeBins(); jTime++) {
-// if(!fClusters[jTime]) continue;
-// fX0 = fClusters[jTime]->GetX() + fdX * (jTime - iTime);
-// break;
-// }
-// }
-// }
-//
-// // update YZ reference point
-// // TODO
-//
-// // update x reference positions (calibration/alignment aware)
-// // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
-// // if(!fClusters[iTime]) continue;
-// // fX[iTime] = fX0 - fClusters[iTime]->GetX();
-// // }
-//
-// FitMI();
-// }
-// if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d nclFit [%d] = %d", iter, fDet, fN2));
-//
-// if(IsOK()){
-// tquality = GetQuality(kZcorr);
-// if(tquality < quality) break;
-// else quality = tquality;
-// }
-// kroadz *= 2.;
-// } // Loop: iter
-// if (!IsOK()) return kFALSE;
-//
-// if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=1) CookLabels();
-//
-// // load calibration params
-// Calibrate();
-// UpdateUsed();
-// return kTRUE;
-// }
+//____________________________________________________________
+void AliTRDseedV1::SetPadPlane(AliTRDpadPlane *p)
+{
+// Shortcut method to initialize pad geometry.
+ if(!p) return;
+ SetTilt(TMath::Tan(TMath::DegToRad()*p->GetTiltingAngle()));
+ SetPadLength(p->GetLengthIPad());
+ SetPadWidth(p->GetWidthIPad());
+}
+
//____________________________________________________________________
-Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *chamber, Bool_t tilt)
+Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *const chamber, Bool_t tilt)
{
- //
- // Projective algorithm to attach clusters to seeding tracklets
- //
- // Parameters
- //
- // Output
- //
- // Detailed description
- // 1. Collapse x coordinate for the full detector plane
- // 2. truncated mean on y (r-phi) direction
- // 3. purge clusters
- // 4. truncated mean on z direction
- // 5. purge clusters
- // 6. fit tracklet
- //
- Bool_t kPRINT = kFALSE;
- if(!fReconstructor->GetRecoParam() ){
+//
+// Projective algorithm to attach clusters to seeding tracklets. The following steps are performed :
+// 1. Collapse x coordinate for the full detector plane
+// 2. truncated mean on y (r-phi) direction
+// 3. purge clusters
+// 4. truncated mean on z direction
+// 5. purge clusters
+//
+// Parameters
+// - chamber : pointer to tracking chamber container used to search the tracklet
+// - tilt : switch for tilt correction during road building [default true]
+// Output
+// - true : if tracklet found successfully. Failure can happend because of the following:
+// -
+// Detailed description
+//
+// We start up by defining the track direction in the xy plane and roads. The roads are calculated based
+// on tracking information (variance in the r-phi direction) and estimated variance of the standard
+// clusters (see AliTRDcluster::SetSigmaY2()) corrected for tilt (see GetCovAt()). From this the road is
+// BEGIN_LATEX
+// r_{y} = 3*#sqrt{12*(#sigma^{2}_{Trk}(y) + #frac{#sigma^{2}_{cl}(y) + tg^{2}(#alpha_{L})#sigma^{2}_{cl}(z)}{1+tg^{2}(#alpha_{L})})}
+// r_{z} = 1.5*L_{pad}
+// END_LATEX
+//
+// Author : Alexandru Bercuci <A.Bercuci@gsi.de>
+// Debug : level >3
+
+ if(!fkReconstructor->GetRecoParam() ){
AliError("Seed can not be used without a valid RecoParam.");
return kFALSE;
}
// Initialize reco params for this tracklet
// 1. first time bin in the drift region
- Int_t t0 = 4;
- Int_t kClmin = Int_t(fReconstructor->GetRecoParam() ->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins());
-
- Double_t syRef = TMath::Sqrt(fRefCov[0]);
+ Int_t t0 = 14;
+ Int_t kClmin = Int_t(fkReconstructor->GetRecoParam() ->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins());
+
+ Double_t sysCov[5]; fkReconstructor->GetRecoParam()->GetSysCovMatrix(sysCov);
+ Double_t s2yTrk= fRefCov[0],
+ s2yCl = 0.,
+ s2zCl = GetPadLength()*GetPadLength()/12.,
+ syRef = TMath::Sqrt(s2yTrk),
+ t2 = GetTilt()*GetTilt();
//define roads
- Double_t kroady = 1.;
- //fReconstructor->GetRecoParam() ->GetRoad1y();
- Double_t kroadz = fPadLength * 1.5 + 1.;
- if(kPRINT) printf("AttachClusters() sy[%f] road[%f]\n", syRef, kroady);
+ Double_t kroady = 1., //fkReconstructor->GetRecoParam() ->GetRoad1y();
+ kroadz = GetPadLength() * fkReconstructor->GetRecoParam()->GetRoadzMultiplicator() + 1.;
+ // define probing cluster (the perfect cluster) and default calibration
+ Short_t sig[] = {0, 0, 10, 30, 10, 0,0};
+ AliTRDcluster cp(fDet, 6, 75, 0, sig, 0);
+ if(fkReconstructor->IsHLT())cp.SetRPhiMethod(AliTRDcluster::kCOG);
+ Calibrate();
+
+ AliDebug(4, "");
+ AliDebug(4, Form("syKalman[%f] rY[%f] rZ[%f]", syRef, kroady, kroadz));
// working variables
const Int_t kNrows = 16;
- AliTRDcluster *clst[kNrows][kNTimeBins];
- Double_t cond[4], dx, dy, yt, zt,
- yres[kNrows][kNTimeBins];
- Int_t idxs[kNrows][kNTimeBins], ncl[kNrows], ncls = 0;
+ const Int_t kNcls = 3*kNclusters; // buffer size
+ AliTRDcluster *clst[kNrows][kNcls];
+ Bool_t blst[kNrows][kNcls];
+ Double_t cond[4], dx, dy, yt, zt, yres[kNrows][kNcls];
+ Int_t idxs[kNrows][kNcls], ncl[kNrows], ncls = 0;
memset(ncl, 0, kNrows*sizeof(Int_t));
- memset(clst, 0, kNrows*kNTimeBins*sizeof(AliTRDcluster*));
+ memset(yres, 0, kNrows*kNcls*sizeof(Double_t));
+ memset(blst, 0, kNrows*kNcls*sizeof(Bool_t)); //this is 8 times faster to memset than "memset(clst, 0, kNrows*kNcls*sizeof(AliTRDcluster*))"
// Do cluster projection
- AliTRDcluster *c = 0x0;
- AliTRDchamberTimeBin *layer = 0x0;
+ AliTRDcluster *c = NULL;
+ AliTRDchamberTimeBin *layer = NULL;
Bool_t kBUFFER = kFALSE;
- for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
+ for (Int_t it = 0; it < kNtb; it++) {
if(!(layer = chamber->GetTB(it))) continue;
if(!Int_t(*layer)) continue;
-
+ // get track projection at layers position
dx = fX0 - layer->GetX();
yt = fYref[0] - fYref[1] * dx;
zt = fZref[0] - fZref[1] * dx;
- if(kPRINT) printf("\t%2d dx[%f] yt[%f] zt[%f]\n", it, dx, yt, zt);
+ // get standard cluster error corrected for tilt
+ cp.SetLocalTimeBin(it);
+ cp.SetSigmaY2(0.02, fDiffT, fExB, dx, -1./*zt*/, fYref[1]);
+ s2yCl = (cp.GetSigmaY2() + sysCov[0] + t2*s2zCl)/(1.+t2);
+ // get estimated road
+ kroady = 3.*TMath::Sqrt(12.*(s2yTrk + s2yCl));
+
+ AliDebug(5, Form(" %2d x[%f] yt[%f] zt[%f]", it, dx, yt, zt));
+
+ AliDebug(5, Form(" syTrk[um]=%6.2f syCl[um]=%6.2f syClTlt[um]=%6.2f Ry[mm]=%f", 1.e4*TMath::Sqrt(s2yTrk), 1.e4*TMath::Sqrt(cp.GetSigmaY2()), 1.e4*TMath::Sqrt(s2yCl), 1.e1*kroady));
- // select clusters on a 5 sigmaKalman level
+ // select clusters
cond[0] = yt; cond[2] = kroady;
cond[1] = zt; cond[3] = kroadz;
Int_t n=0, idx[6];
for(Int_t ic = n; ic--;){
c = (*layer)[idx[ic]];
dy = yt - c->GetY();
- dy += tilt ? fTilt * (c->GetZ() - zt) : 0.;
+ dy += tilt ? GetTilt() * (c->GetZ() - zt) : 0.;
// select clusters on a 3 sigmaKalman level
/* if(tilt && TMath::Abs(dy) > 3.*syRef){
printf("too large !!!\n");
continue;
}*/
Int_t r = c->GetPadRow();
- if(kPRINT) printf("\t\t%d dy[%f] yc[%f] r[%d]\n", ic, TMath::Abs(dy), c->GetY(), r);
+ AliDebug(5, Form(" -> dy[%f] yc[%f] r[%d]", TMath::Abs(dy), c->GetY(), r));
clst[r][ncl[r]] = c;
+ blst[r][ncl[r]] = kTRUE;
idxs[r][ncl[r]] = idx[ic];
yres[r][ncl[r]] = dy;
ncl[r]++; ncls++;
- if(ncl[r] >= kNTimeBins) {
- AliWarning(Form("Cluster candidates reached limit %d. Some may be lost.", kNTimeBins));
+ if(ncl[r] >= kNcls) {
+ AliWarning(Form("Cluster candidates reached buffer limit %d. Some may be lost.", kNcls));
kBUFFER = kTRUE;
break;
}
}
if(kBUFFER) break;
}
- if(kPRINT) printf("Found %d clusters\n", ncls);
- if(ncls<kClmin) return kFALSE;
-
+ AliDebug(4, Form("Found %d clusters. Processing ...", ncls));
+ if(ncls<kClmin){
+ AliDebug(2, Form("CLUSTERS FOUND %d LESS THAN THRESHOLD %d.", ncls, kClmin));
+ SetErrorMsg(kAttachClFound);
+ return kFALSE;
+ }
+
// analyze each row individualy
Double_t mean, syDis;
Int_t nrow[] = {0, 0, 0}, nr = 0, lr=-1;
for(Int_t ir=kNrows; ir--;){
if(!(ncl[ir])) continue;
if(lr>0 && lr-ir != 1){
- if(kPRINT) printf("W - gap in rows attached !!\n");
+ AliDebug(2, "Gap in rows attached");
}
- if(kPRINT) printf("\tir[%d] lr[%d] n[%d]\n", ir, lr, ncl[ir]);
+ AliDebug(5, Form(" r[%d] n[%d]", ir, ncl[ir]));
// Evaluate truncated mean on the y direction
if(ncl[ir] > 3) AliMathBase::EvaluateUni(ncl[ir], yres[ir], mean, syDis, Int_t(ncl[ir]*.8));
else {
mean = 0.; syDis = 0.;
+ continue;
}
+ if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()){
+ TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ TVectorD vdy(ncl[ir], yres[ir]);
+ UChar_t stat(0);
+ if(IsKink()) SETBIT(stat, 1);
+ if(IsStandAlone()) SETBIT(stat, 2);
+ cstreamer << "AttachClusters"
+ << "stat=" << stat
+ << "det=" << fDet
+ << "pt=" << fPt
+ << "s2y=" << s2yTrk
+ << "dy=" << &vdy
+ << "m=" << mean
+ << "s=" << syDis
+ << "\n";
+ }
+
// TODO check mean and sigma agains cluster resolution !!
- if(kPRINT) printf("\tr[%2d] m[%f %5.3fsigma] s[%f]\n", ir, mean, TMath::Abs(mean/syRef), syDis);
+ AliDebug(4, Form(" m[%f (%5.3fs)] s[%f]", mean, TMath::Abs(mean/syDis), syDis));
// select clusters on a 3 sigmaDistr level
Bool_t kFOUND = kFALSE;
for(Int_t ic = ncl[ir]; ic--;){
if(yres[ir][ic] - mean > 3. * syDis){
- clst[ir][ic] = 0x0; continue;
+ blst[ir][ic] = kFALSE; continue;
}
nrow[nr]++; kFOUND = kTRUE;
}
if(kFOUND) nr++;
lr = ir; if(nr>=3) break;
}
- if(kPRINT) printf("lr[%d] nr[%d] nrow[0]=%d nrow[1]=%d nrow[2]=%d\n", lr, nr, nrow[0], nrow[1], nrow[2]);
+ AliDebug(4, Form(" nr[%d = %d + %d + %d]", nr, nrow[0], nrow[1], nrow[2]));
// classify cluster rows
Int_t row = -1;
SetBit(kRowCross, kTRUE); // mark pad row crossing
break;
}
- if(kPRINT) printf("\trow[%d] n[%d]\n\n", row, nrow[0]);
- if(row<0) return kFALSE;
-
+ AliDebug(4, Form(" Ncl[rowMax = %d] = %d", row, nrow[0]));
+ if(row<0){
+ AliDebug(2, Form("WRONG ROW %d.", row));
+ SetErrorMsg(kAttachRow);
+ return kFALSE;
+ }
// Select and store clusters
// We should consider here :
// 1. How far is the chamber boundary
// 2. How big is the mean
- fN2 = 0;
+ Int_t n = 0;
for (Int_t ir = 0; ir < nr; ir++) {
Int_t jr = row + ir*lr;
- if(kPRINT) printf("\tattach %d clusters for row %d\n", ncl[jr], jr);
+ AliDebug(4, Form(" Ncl[%d] @ R[%d] attaching ...", ncl[jr], jr));
for (Int_t ic = 0; ic < ncl[jr]; ic++) {
- if(!(c = clst[jr][ic])) continue;
+ if(!blst[jr][ic])continue;
+ c = clst[jr][ic];
Int_t it = c->GetPadTime();
+ Int_t idx = it+kNtb*ir;
+ if(fClusters[idx]){
+ AliDebug(2, Form("Cluster position already allocated tb[%2d] r[%d]. Skip !", it, jr));
+ SetErrorMsg(kAttachMultipleCl);
+ continue;
+ }
+
// TODO proper indexing of clusters !!
- fIndexes[it+kNtb*ir] = chamber->GetTB(it)->GetGlobalIndex(idxs[jr][ic]);
- fClusters[it+kNtb*ir] = c;
-
- //printf("\tid[%2d] it[%d] idx[%d]\n", ic, it, fIndexes[it]);
-
- fN2++;
+ fIndexes[idx] = chamber->GetTB(it)->GetGlobalIndex(idxs[jr][ic]);
+ fClusters[idx] = c;
+ n++;
}
}
+ SetN(n);
// number of minimum numbers of clusters expected for the tracklet
- if (fN2 < kClmin){
- AliWarning(Form("Not enough clusters to fit the tracklet %d [%d].", fN2, kClmin));
- fN2 = 0;
+ if (GetN() < kClmin){
+ AliDebug(2, Form("NOT ENOUGH CLUSTERS ATTACHED TO THE TRACKLET %d [%d] FROM FOUND [%d].", GetN(), kClmin, n));
+ SetErrorMsg(kAttachClAttach);
return kFALSE;
}
Calibrate();
// calculate dx for time bins in the drift region (calibration aware)
- Int_t irp = 0; Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0};
- for (Int_t it = t0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
+ Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0};
+ for (Int_t it = t0, irp=0; irp<2 && it < AliTRDtrackerV1::GetNTimeBins(); it++) {
if(!fClusters[it]) continue;
x[irp] = fClusters[it]->GetX();
- tb[irp] = it;
+ tb[irp] = fClusters[it]->GetLocalTimeBin();
irp++;
- if(irp==2) break;
}
Int_t dtb = tb[1] - tb[0];
fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
-
- // update X0 from the clusters (calibration/alignment aware) TODO remove dependence on x0 !!
- for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
- if(!(layer = chamber->GetTB(it))) continue;
- if(!layer->IsT0()) continue;
- if(fClusters[it]){
- fX0 = fClusters[it]->GetX();
- break;
- } else { // we have to infere the position of the anode wire from the other clusters
- for (Int_t jt = it+1; jt < AliTRDtrackerV1::GetNTimeBins(); jt++) {
- if(!fClusters[jt]) continue;
- fX0 = fClusters[jt]->GetX() + fdX * (jt - it);
- break;
- }
- }
- }
-
return kTRUE;
}
//
// A.Bercuci <A.Bercuci@gsi.de> Oct 30th 2008
//
- fReconstructor = rec;
+ fkReconstructor = rec;
AliTRDgeometry g;
AliTRDpadPlane *pp = g.GetPadPlane(fDet);
- fTilt = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle());
- fPadLength = pp->GetLengthIPad();
+ fPad[0] = pp->GetLengthIPad();
+ fPad[1] = pp->GetWidthIPad();
+ fPad[3] = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle());
//fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);
//fTgl = fZref[1];
- fN2 = 0;// fMPads = 0.;
+ Int_t n = 0, nshare = 0, nused = 0;
AliTRDcluster **cit = &fClusters[0];
- for(Int_t ic = kNTimeBins; ic--; cit++){
+ for(Int_t ic = kNclusters; ic--; cit++){
if(!(*cit)) return;
- fN2++;
-/* fX[ic] = (*cit)->GetX() - fX0;
- fY[ic] = (*cit)->GetY();
- fZ[ic] = (*cit)->GetZ();*/
+ n++;
+ if((*cit)->IsShared()) nshare++;
+ if((*cit)->IsUsed()) nused++;
}
- //Update(); //
+ SetN(n); SetNUsed(nused); SetNShared(nshare);
Fit();
CookLabels();
GetProbability();
//____________________________________________________________________
-Bool_t AliTRDseedV1::Fit(Bool_t tilt, Int_t errors)
+Bool_t AliTRDseedV1::Fit(Bool_t tilt, Bool_t zcorr)
{
- //
- // Linear fit of the tracklet
- //
- // Parameters :
- //
- // Output :
- // True if successful
- //
- // Detailed description
- // 2. Check if tracklet crosses pad row boundary
- // 1. Calculate residuals in the y (r-phi) direction
- // 3. Do a Least Square Fit to the data
- //
+//
+// Linear fit of the clusters attached to the tracklet
+//
+// Parameters :
+// - tilt : switch for tilt pad correction of cluster y position based on
+// the z, dzdx info from outside [default false].
+// - zcorr : switch for using z information to correct for anisochronity
+// and a finner error parameterization estimation [default false]
+// Output :
+// True if successful
+//
+// Detailed description
+//
+// Fit in the xy plane
+//
+// The fit is performed to estimate the y position of the tracklet and the track
+// angle in the bending plane. The clusters are represented in the chamber coordinate
+// system (with respect to the anode wire - see AliTRDtrackerV1::FollowBackProlongation()
+// on how this is set). The x and y position of the cluster and also their variances
+// are known from clusterizer level (see AliTRDcluster::GetXloc(), AliTRDcluster::GetYloc(),
+// AliTRDcluster::GetSX() and AliTRDcluster::GetSY()).
+// If gaussian approximation is used to calculate y coordinate of the cluster the position
+// is recalculated taking into account the track angle. The general formula to calculate the
+// error of cluster position in the gaussian approximation taking into account diffusion and track
+// inclination is given for TRD by:
+// BEGIN_LATEX
+// #sigma^{2}_{y} = #sigma^{2}_{PRF} + #frac{x#delta_{t}^{2}}{(1+tg(#alpha_{L}))^{2}} + #frac{x^{2}tg^{2}(#phi-#alpha_{L})tg^{2}(#alpha_{L})}{12}
+// END_LATEX
+//
+// Since errors are calculated only in the y directions, radial errors (x direction) are mapped to y
+// by projection i.e.
+// BEGIN_LATEX
+// #sigma_{x|y} = tg(#phi) #sigma_{x}
+// END_LATEX
+// and also by the lorentz angle correction
+//
+// Fit in the xz plane
+//
+// The "fit" is performed to estimate the radial position (x direction) where pad row cross happens.
+// If no pad row crossing the z position is taken from geometry and radial position is taken from the xy
+// fit (see below).
+//
+// There are two methods to estimate the radial position of the pad row cross:
+// 1. leading cluster radial position : Here the lower part of the tracklet is considered and the last
+// cluster registered (at radial x0) on this segment is chosen to mark the pad row crossing. The error
+// of the z estimate is given by :
+// BEGIN_LATEX
+// #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12
+// END_LATEX
+// The systematic errors for this estimation are generated by the following sources:
+// - no charge sharing between pad rows is considered (sharp cross)
+// - missing cluster at row cross (noise peak-up, under-threshold signal etc.).
+//
+// 2. charge fit over the crossing point : Here the full energy deposit along the tracklet is considered
+// to estimate the position of the crossing by a fit in the qx plane. The errors in the q directions are
+// parameterized as s_q = q^2. The systematic errors for this estimation are generated by the following sources:
+// - no general model for the qx dependence
+// - physical fluctuations of the charge deposit
+// - gain calibration dependence
+//
+// Estimation of the radial position of the tracklet
+//
+// For pad row cross the radial position is taken from the xz fit (see above). Otherwise it is taken as the
+// interpolation point of the tracklet i.e. the point where the error in y of the fit is minimum. The error
+// in the y direction of the tracklet is (see AliTRDseedV1::GetCovAt()):
+// BEGIN_LATEX
+// #sigma_{y} = #sigma^{2}_{y_{0}} + 2xcov(y_{0}, dy/dx) + #sigma^{2}_{dy/dx}
+// END_LATEX
+// and thus the radial position is:
+// BEGIN_LATEX
+// x = - cov(y_{0}, dy/dx)/#sigma^{2}_{dy/dx}
+// END_LATEX
+//
+// Estimation of tracklet position error
+//
+// The error in y direction is the error of the linear fit at the radial position of the tracklet while in the z
+// direction is given by the cluster error or pad row cross error. In case of no pad row cross this is given by:
+// BEGIN_LATEX
+// #sigma_{y} = #sigma^{2}_{y_{0}} - 2cov^{2}(y_{0}, dy/dx)/#sigma^{2}_{dy/dx} + #sigma^{2}_{dy/dx}
+// #sigma_{z} = Pad_{length}/12
+// END_LATEX
+// For pad row cross the full error is calculated at the radial position of the crossing (see above) and the error
+// in z by the width of the crossing region - being a matter of parameterization.
+// BEGIN_LATEX
+// #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12
+// END_LATEX
+// In case of no tilt correction (default in the barrel tracking) the tilt is taken into account by the rotation of
+// the covariance matrix. See AliTRDseedV1::GetCovAt() for details.
+//
+// Author
+// A.Bercuci <A.Bercuci@gsi.de>
- if(!IsCalibrated()){
- AliWarning("Tracklet fit failed. Call Calibrate().");
- return kFALSE;
- }
+ if(!IsCalibrated()) Calibrate();
const Int_t kClmin = 8;
-
- // cluster error parametrization parameters
- // 1. sy total charge
- const Float_t sq0inv = 0.019962; // [1/q0]
- const Float_t sqb = 1.0281564; //[cm]
- // 2. sy for the PRF
- const Float_t scy[AliTRDgeometry::kNlayer][4] = {
- {2.827e-02, 9.600e-04, 4.296e-01, 2.271e-02},
- {2.952e-02,-2.198e-04, 4.146e-01, 2.339e-02},
- {3.090e-02, 1.514e-03, 4.020e-01, 2.402e-02},
- {3.260e-02,-2.037e-03, 3.946e-01, 2.509e-02},
- {3.439e-02,-3.601e-04, 3.883e-01, 2.623e-02},
- {3.510e-02, 2.066e-03, 3.651e-01, 2.588e-02},
- };
- // 3. sy parallel to the track
- const Float_t sy0 = 2.649e-02; // [cm]
- const Float_t sya = -8.864e-04; // [cm]
- const Float_t syb = -2.435e-01; // [cm]
-
- // 4. sx parallel to the track
- const Float_t sxgc = 5.427e-02;
- const Float_t sxgm = 7.783e-01;
- const Float_t sxgs = 2.743e-01;
- const Float_t sxe0 =-2.065e+00;
- const Float_t sxe1 =-2.978e-02;
-
- // 5. sx perpendicular to the track
-// const Float_t sxd0 = 1.881e-02;
-// const Float_t sxd1 =-4.101e-01;
-// const Float_t sxd2 = 1.572e+00;
-
// get track direction
Double_t y0 = fYref[0];
Double_t dydx = fYref[1];
Double_t dzdx = fZref[1];
Double_t yt, zt;
- const Int_t kNtb = AliTRDtrackerV1::GetNTimeBins();
- // calculation of tg^2(phi - a_L) and tg^2(a_L)
- Double_t tgg = (dydx-fExB)/(1.+dydx*fExB); tgg *= tgg;
- //Double_t exb2= fExB*fExB;
+ AliTRDtrackerV1::AliTRDLeastSquare fitterY;
+ AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
- //AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
- TLinearFitter fitterY(1, "pol1");
- // convertion factor from square to gauss distribution for sigma
- //Double_t convert = 1./TMath::Sqrt(12.);
-
// book cluster information
- Double_t qc[kNTimeBins], xc[kNTimeBins], yc[kNTimeBins], zc[kNTimeBins], sy[kNTimeBins];
+ Double_t qc[kNclusters], xc[kNclusters], yc[kNclusters], zc[kNclusters], sy[kNclusters];
- Int_t ily = AliTRDgeometry::GetLayer(fDet);
- Int_t fN = 0;
- AliTRDcluster *c=0x0, **jc = &fClusters[0];
+ Int_t n = 0;
+ AliTRDcluster *c=NULL, **jc = &fClusters[0];
for (Int_t ic=0; ic<kNtb; ic++, ++jc) {
- //zRow[ic] = -1;
xc[ic] = -1.;
yc[ic] = 999.;
zc[ic] = 999.;
sy[ic] = 0.;
- //sz[ic] = 0.;
if(!(c = (*jc))) continue;
if(!c->IsInChamber()) continue;
if(c->GetNPads()>4) w = .5;
if(c->GetNPads()>5) w = .2;
- //zRow[fN] = c->GetPadRow();
- qc[fN] = TMath::Abs(c->GetQ());
- // correct cluster position for PRF and v drift
+ // cluster charge
+ qc[n] = TMath::Abs(c->GetQ());
+ // pad row of leading
+
+ // Radial cluster position
//Int_t jc = TMath::Max(fN-3, 0);
//xc[fN] = c->GetXloc(fT0, fVD, &qc[jc], &xc[jc]/*, z0 - c->GetX()*dzdx*/);
- //Double_t s2 = fS2PRF + fDiffL*fDiffL*xc[fN]/(1.+2.*exb2)+tgg*xc[fN]*xc[fN]*exb2/12.;
- //yc[fN] = c->GetYloc(s2, fPadLength, xc[fN], fExB);
-
- // uncalibrated cluster correction
- // TODO remove
- Double_t x, y; GetClusterXY(c, x, y);
- xc[fN] = fX0 - x;
- yc[fN] = y;
- zc[fN] = c->GetZ();
-
- // extrapolated y value for the track
- yt = y0 - xc[fN]*dydx;
- // extrapolated z value for the track
- zt = z0 - xc[fN]*dzdx;
- // tilt correction
- if(tilt) yc[fN] -= fTilt*(zc[fN] - zt);
-
- // ELABORATE CLUSTER ERROR
- // TODO to be moved to AliTRDcluster
- // basic y error (|| to track).
- sy[fN] = xc[fN] < AliTRDgeometry::CamHght() ? 2. : sy0 + sya*TMath::Exp(1./(xc[fN]+syb));
- //printf("cluster[%d]\n\tsy[0] = %5.3e [um]\n", fN, sy[fN]*1.e4);
- // y error due to total charge
- sy[fN] += sqb*(1./qc[fN] - sq0inv);
- //printf("\tsy[1] = %5.3e [um]\n", sy[fN]*1.e4);
- // y error due to PRF
- sy[fN] += scy[ily][0]*TMath::Gaus(c->GetCenter(), scy[ily][1], scy[ily][2]) - scy[ily][3];
- //printf("\tsy[2] = %5.3e [um]\n", sy[fN]*1.e4);
-
- sy[fN] *= sy[fN];
-
- // ADD ERROR ON x
- // error of drift length parallel to the track
- Double_t sx = sxgc*TMath::Gaus(xc[fN], sxgm, sxgs) + TMath::Exp(sxe0+sxe1*xc[fN]); // [cm]
- //printf("\tsx[0] = %5.3e [um]\n", sx*1.e4);
- // error of drift length perpendicular to the track
- //sx += sxd0 + sxd1*d + sxd2*d*d;
- sx *= sx; // square sx
-
- // add error from ExB
- if(errors>0) sy[fN] += fExB*fExB*sx;
- //printf("\tsy[3] = %5.3e [um^2]\n", sy[fN]*1.e8);
-
- // global radial error due to misalignment/miscalibration
- Double_t sx0 = 0.; sx0 *= sx0;
- // add sx contribution to sy due to track angle
- if(errors>1) sy[fN] += tgg*(sx+sx0);
- // TODO we should add tilt pad correction here
- //printf("\tsy[4] = %5.3e [um^2]\n", sy[fN]*1.e8);
- c->SetSigmaY2(sy[fN]);
-
- sy[fN] = TMath::Sqrt(sy[fN]);
- fitterY.AddPoint(&xc[fN], yc[fN], sy[fN]);
- fN++;
+ xc[n] = fX0 - c->GetX();
+
+ // extrapolated track to cluster position
+ yt = y0 - xc[n]*dydx;
+ zt = z0 - xc[n]*dzdx;
+
+ // Recalculate cluster error based on tracking information
+ c->SetSigmaY2(fS2PRF, fDiffT, fExB, xc[n], zcorr?zt:-1., dydx);
+ sy[n] = TMath::Sqrt(c->GetSigmaY2());
+
+ yc[n] = fkReconstructor->GetRecoParam()->UseGAUS() ?
+ c->GetYloc(y0, sy[n], GetPadWidth()): c->GetY();
+ zc[n] = c->GetZ();
+ //optional tilt correction
+ if(tilt) yc[n] -= (GetTilt()*(zc[n] - zt));
+
+ fitterY.AddPoint(&xc[n], yc[n], TMath::Sqrt(sy[n]));
+ if(IsRowCross())fitterZ.AddPoint(&xc[n], qc[n], 1.);
+ n++;
}
+
// to few clusters
- if (fN < kClmin) return kFALSE;
+ if (n < kClmin) return kFALSE;
// fit XY
fitterY.Eval();
- fYfit[0] = fitterY.GetParameter(0);
- fYfit[1] = -fitterY.GetParameter(1);
+ fYfit[0] = fitterY.GetFunctionParameter(0);
+ fYfit[1] = -fitterY.GetFunctionParameter(1);
// store covariance
- Double_t *p = fitterY.GetCovarianceMatrix();
+ Double_t p[3];
+ fitterY.GetCovarianceMatrix(p);
fCov[0] = p[0]; // variance of y0
- fCov[1] = p[1]; // covariance of y0, dydx
- fCov[2] = p[3]; // variance of dydx
+ fCov[1] = p[2]; // covariance of y0, dydx
+ fCov[2] = p[1]; // variance of dydx
// the ref radial position is set at the minimum of
// the y variance of the tracklet
- fX = -fCov[1]/fCov[2]; //fXref = fX0 - fXref;
- fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2];
+ fX = -fCov[1]/fCov[2];
// fit XZ
- if(IsRowCross()){
- // TODO pad row cross position estimation !!!
- //AliInfo(Form("Padrow cross in detector %d", fDet));
- fZfit[0] = .5*(zc[0]+zc[fN-1]); fZfit[1] = 0.;
- fS2Z = 0.02+1.55*fZref[1]; fS2Z *= fS2Z;
+ if(IsRowCross()){
+/* // THE LEADING CLUSTER METHOD
+ Float_t xMin = fX0;
+ Int_t ic=n=kNclusters-1; jc = &fClusters[ic];
+ AliTRDcluster *c0 =0x0, **kc = &fClusters[kNtb-1];
+ for(; ic>kNtb; ic--, --jc, --kc){
+ if((c0 = (*kc)) && c0->IsInChamber() && (xMin>c0->GetX())) xMin = c0->GetX();
+ if(!(c = (*jc))) continue;
+ if(!c->IsInChamber()) continue;
+ zc[kNclusters-1] = c->GetZ();
+ fX = fX0 - c->GetX();
+ }
+ fZfit[0] = .5*(zc[0]+zc[kNclusters-1]); fZfit[1] = 0.;
+ // Error parameterization
+ fS2Z = fdX*fZref[1];
+ fS2Z *= fS2Z; fS2Z *= 0.2887; // 1/sqrt(12)*/
+
+ // THE FIT X-Q PLANE METHOD
+ Int_t ic=n=kNclusters-1; jc = &fClusters[ic];
+ for(; ic>kNtb; ic--, --jc){
+ if(!(c = (*jc))) continue;
+ if(!c->IsInChamber()) continue;
+ qc[n] = TMath::Abs(c->GetQ());
+ xc[n] = fX0 - c->GetX();
+ zc[n] = c->GetZ();
+ fitterZ.AddPoint(&xc[n], -qc[n], 1.);
+ n--;
+ }
+ // fit XZ
+ fitterZ.Eval();
+ if(fitterZ.GetFunctionParameter(1)!=0.){
+ fX = -fitterZ.GetFunctionParameter(0)/fitterZ.GetFunctionParameter(1);
+ fX=(fX<0.)?0.:fX;
+ Float_t dl = .5*AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght();
+ fX=(fX> dl)?dl:fX;
+ fX-=.055; // TODO to be understood
+ }
+
+ fZfit[0] = .5*(zc[0]+zc[kNclusters-1]); fZfit[1] = 0.;
+ // temporary external error parameterization
+ fS2Z = 0.05+0.4*TMath::Abs(fZref[1]); fS2Z *= fS2Z;
+ // TODO correct formula
+ //fS2Z = sigma_x*TMath::Abs(fZref[1]);
} else {
fZfit[0] = zc[0]; fZfit[1] = 0.;
- fS2Z = fPadLength*fPadLength/12.;
+ fS2Z = GetPadLength()*GetPadLength()/12.;
}
-
-
-// // determine z offset of the fit
-// Float_t zslope = 0.;
-// Int_t nchanges = 0, nCross = 0;
-// if(nz==2){ // tracklet is crossing pad row
-// // Find the break time allowing one chage on pad-rows
-// // with maximal number of accepted clusters
-// Int_t padRef = zRow[0];
-// for (Int_t ic=1; ic<fN; ic++) {
-// if(zRow[ic] == padRef) continue;
-//
-// // debug
-// if(zRow[ic-1] == zRow[ic]){
-// printf("ERROR in pad row change!!!\n");
-// }
-//
-// // evaluate parameters of the crossing point
-// Float_t sx = (xc[ic-1] - xc[ic])*convert;
-// fCross[0] = .5 * (xc[ic-1] + xc[ic]);
-// fCross[2] = .5 * (zc[ic-1] + zc[ic]);
-// fCross[3] = TMath::Max(dzdx * sx, .01);
-// zslope = zc[ic-1] > zc[ic] ? 1. : -1.;
-// padRef = zRow[ic];
-// nCross = ic;
-// nchanges++;
-// }
-// }
-//
-// // condition on nCross and reset nchanges TODO
-//
-// if(nchanges==1){
-// if(dzdx * zslope < 0.){
-// AliInfo("Tracklet-Track mismatch in dzdx. TODO.");
-// }
-//
-//
-// //zc[nc] = fitterZ.GetFunctionParameter(0);
-// fCross[1] = fYfit[0] - fCross[0] * fYfit[1];
-// fCross[0] = fX0 - fCross[0];
-// }
-
+ fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2];
return kTRUE;
}
}
Float_t sigmaexp = 0.05 + TMath::Abs(fYref[1] * 0.25); // Expected r.m.s in y direction
- Float_t ycrosscor = fPadLength * fTilt * 0.5; // Y correction for crossing
+ Float_t ycrosscor = GetPadLength() * GetTilt() * 0.5; // Y correction for crossing
Int_t fNChange = 0;
Double_t sumw;
Int_t zouts[2*kNtb];
Float_t allowedz[kNtb]; // Allowed z for given time bin
Float_t yres[kNtb]; // Residuals from reference
- //Float_t anglecor = fTilt * fZref[1]; // Correction to the angle
+ //Float_t anglecor = GetTilt() * fZref[1]; // Correction to the angle
Float_t pos[3*kNtb]; memset(pos, 0, 3*kNtb*sizeof(Float_t));
Float_t *fX = &pos[0], *fY = &pos[kNtb], *fZ = &pos[2*kNtb];
if (!(c = fClusters[i])) continue;
if(!c->IsInChamber()) continue;
// Residual y
- //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + fTilt*(fZ[i] - fZref[0]);
+ //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + GetTilt()*(fZ[i] - fZref[0]);
fX[i] = fX0 - c->GetX();
fY[i] = c->GetY();
fZ[i] = c->GetZ();
- yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
+ yres[i] = fY[i] - GetTilt()*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
zints[fN] = Int_t(fZ[i]);
fN++;
}
if(!fClusters[i]->IsInChamber()) continue;
if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue;
// Residual y
- //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + fTilt*(fZ[i] - fZref[0]);
- yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
+ //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + GetTilt()*(fZ[i] - fZref[0]);
+ yres[i] = fY[i] - GetTilt()*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
// if (TMath::Abs(fZ[i] - fZProb) > 2) {
-// if (fZ[i] > fZProb) yres[i] += fTilt * fPadLength;
-// if (fZ[i] < fZProb) yres[i] -= fTilt * fPadLength;
+// if (fZ[i] > fZProb) yres[i] += GetTilt() * GetPadLength();
+// if (fZ[i] < fZProb) yres[i] -= GetTilt() * GetPadLength();
}
}
}
// Printing the seedstatus
//
- AliInfo(Form("Det[%3d] Tilt[%+6.2f] Pad[%5.2f]", fDet, fTilt, fPadLength));
- AliInfo(Form("N[%2d] ", fN2));
- AliInfo(Form("x[%7.2f] y[%7.2f] z[%7.2f] dydx[%5.2f] dzdx[%5.2f]", fX0, fYfit[0], fZfit[0], fYfit[1], fZfit[1]));
- AliInfo(Form("Ref y[%7.2f] z[%7.2f] dydx[%5.2f] dzdx[%5.2f]", fYref[0], fZref[0], fYref[1], fZref[1]))
+ AliInfo(Form("Det[%3d] X0[%7.2f] Pad{L[%5.2f] W[%5.2f] Tilt[%+6.2f]}", fDet, fX0, GetPadLength(), GetPadWidth(), GetTilt()));
+ AliInfo(Form("N[%2d] Nused[%2d] Nshared[%2d] [%d]", GetN(), GetNUsed(), GetNShared(), fN));
+ AliInfo(Form("FLAGS : RC[%c] Kink[%c] SA[%c]", IsRowCross()?'y':'n', IsKink()?'y':'n', IsStandAlone()?'y':'n'));
+ Double_t cov[3], x=GetX();
+ GetCovAt(x, cov);
+ AliInfo(" | x[cm] | y[cm] | z[cm] | dydx | dzdx |");
+ AliInfo(Form("Fit | %7.2f | %7.2f+-%7.2f | %7.2f+-%7.2f| %5.2f | ----- |", x, GetY(), TMath::Sqrt(cov[0]), GetZ(), TMath::Sqrt(cov[2]), fYfit[1]));
+ AliInfo(Form("Ref | %7.2f | %7.2f+-%7.2f | %7.2f+-%7.2f| %5.2f | %5.2f |", x, fYref[0]-fX*fYref[1], TMath::Sqrt(fRefCov[0]), fZref[0]-fX*fYref[1], TMath::Sqrt(fRefCov[2]), fYref[1], fZref[1]))
+ AliInfo(Form("P / Pt [GeV/c] = %f / %f", GetMomentum(), fPt));
+ AliInfo(Form("dEdx [a.u.] = %f / %f / %f / %f / %f/ %f / %f / %f", fdEdx[0], fdEdx[1], fdEdx[2], fdEdx[3], fdEdx[4], fdEdx[5], fdEdx[6], fdEdx[7]));
+ AliInfo(Form("PID = %5.3f / %5.3f / %5.3f / %5.3f / %5.3f", fProb[0], fProb[1], fProb[2], fProb[3], fProb[4]));
if(strcmp(o, "a")!=0) return;
AliTRDcluster* const* jc = &fClusters[0];
- for(int ic=0; ic<kNTimeBins; ic++, jc++) {
+ for(int ic=0; ic<kNclusters; ic++, jc++) {
if(!(*jc)) continue;
(*jc)->Print(o);
}
}
if ( fS2Y != inTracklet->fS2Y ) return kFALSE;
- if ( fTilt != inTracklet->fTilt ) return kFALSE;
- if ( fPadLength != inTracklet->fPadLength ) return kFALSE;
+ if ( GetTilt() != inTracklet->GetTilt() ) return kFALSE;
+ if ( GetPadLength() != inTracklet->GetPadLength() ) return kFALSE;
- for (Int_t i = 0; i < kNTimeBins; i++){
+ for (Int_t i = 0; i < kNclusters; i++){
// if ( fX[i] != inTracklet->GetX(i) ) return kFALSE;
// if ( fY[i] != inTracklet->GetY(i) ) return kFALSE;
// if ( fZ[i] != inTracklet->GetZ(i) ) return kFALSE;
/* if ( fMeanz != inTracklet->GetMeanz() ) return kFALSE;
if ( fZProb != inTracklet->GetZProb() ) return kFALSE;*/
- if ( fN2 != inTracklet->fN2 ) return kFALSE;
- if ( fNUsed != inTracklet->fNUsed ) return kFALSE;
+ if ( fN != inTracklet->fN ) return kFALSE;
+ //if ( fNUsed != inTracklet->fNUsed ) return kFALSE;
//if ( fFreq != inTracklet->GetFreq() ) return kFALSE;
//if ( fNChange != inTracklet->GetNChange() ) return kFALSE;
// if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE;
if ( fDet != inTracklet->fDet ) return kFALSE;
- if ( fMom != inTracklet->fMom ) return kFALSE;
+ if ( fPt != inTracklet->fPt ) return kFALSE;
if ( fdX != inTracklet->fdX ) return kFALSE;
- for (Int_t iCluster = 0; iCluster < kNTimeBins; iCluster++){
+ for (Int_t iCluster = 0; iCluster < kNclusters; iCluster++){
AliTRDcluster *curCluster = fClusters[iCluster];
AliTRDcluster *inCluster = inTracklet->fClusters[iCluster];
if (curCluster && inCluster){
}
return kTRUE;
}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff