/* $Id$ */
////////////////////////////////////////////////////////////////////////////
-// //
-// 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 "TMath.h"
-#include "TLinearFitter.h"
-#include "TClonesArray.h" // tmp
-#include <TTreeStream.h>
+#include "TTreeStream.h"
+#include "TGraphErrors.h"
#include "AliLog.h"
#include "AliMathBase.h"
+#include "AliRieman.h"
#include "AliCDBManager.h"
-#include "AliTracker.h"
+#include "AliTRDReconstructor.h"
#include "AliTRDpadPlane.h"
+#include "AliTRDtransform.h"
#include "AliTRDcluster.h"
#include "AliTRDseedV1.h"
#include "AliTRDtrackV1.h"
#include "AliTRDchamberTimeBin.h"
#include "AliTRDtrackingChamber.h"
#include "AliTRDtrackerV1.h"
-#include "AliTRDReconstructor.h"
#include "AliTRDrecoParam.h"
+#include "AliTRDCommonParam.h"
+#include "AliTRDtrackletOflHelper.h"
+#include "Cal/AliTRDCalTrkAttach.h"
#include "Cal/AliTRDCalPID.h"
#include "Cal/AliTRDCalROC.h"
#include "Cal/AliTRDCalDet.h"
+class AliTracker;
+
ClassImp(AliTRDseedV1)
//____________________________________________________________________
AliTRDseedV1::AliTRDseedV1(Int_t det)
- :AliTRDseed()
- ,fReconstructor(0x0)
- ,fClusterIter(0x0)
+ :AliTRDtrackletBase()
+ ,fkReconstructor(NULL)
+ ,fClusterIter(NULL)
+ ,fExB(0.)
+ ,fVD(0.)
+ ,fT0(0.)
+ ,fS2PRF(0.)
+ ,fDiffL(0.)
+ ,fDiffT(0.)
,fClusterIdx(0)
+ ,fErrorMsg(0)
+ ,fN(0)
,fDet(det)
- ,fMom(0.)
- ,fSnp(0.)
- ,fTgl(0.)
+ ,fPt(0.)
,fdX(0.)
- ,fXref(0.)
- ,fExB(0.)
+ ,fX0(0.)
+ ,fX(0.)
+ ,fY(0.)
+ ,fZ(0.)
+ ,fS2Y(0.)
+ ,fS2Z(0.)
+ ,fChi2(0.)
{
//
// Constructor
//
- for(int islice=0; islice < knSlices; islice++) fdEdx[islice] = 0.;
+ memset(fIndexes,0xFF,kNclusters*sizeof(fIndexes[0]));
+ memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
+ memset(fPad, 0, 4*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));
for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
- fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.;
+ fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels
+ fLabels[2]=0; // number of different labels for tracklet
+ memset(fRefCov, 0, 7*sizeof(Double_t));
+ // stand alone curvature
+ fC[0] = 0.; fC[1] = 0.;
// covariance matrix [diagonal]
// default sy = 200um and sz = 2.3 cm
fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3;
+ SetStandAlone(kFALSE);
}
//____________________________________________________________________
AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &ref)
- :AliTRDseed((AliTRDseed&)ref)
- ,fReconstructor(ref.fReconstructor)
- ,fClusterIter(0x0)
+ :AliTRDtrackletBase((AliTRDtrackletBase&)ref)
+ ,fkReconstructor(NULL)
+ ,fClusterIter(NULL)
+ ,fExB(0.)
+ ,fVD(0.)
+ ,fT0(0.)
+ ,fS2PRF(0.)
+ ,fDiffL(0.)
+ ,fDiffT(0.)
,fClusterIdx(0)
- ,fDet(ref.fDet)
- ,fMom(ref.fMom)
- ,fSnp(ref.fSnp)
- ,fTgl(ref.fTgl)
- ,fdX(ref.fdX)
- ,fXref(ref.fXref)
- ,fExB(ref.fExB)
+ ,fErrorMsg(0)
+ ,fN(0)
+ ,fDet(-1)
+ ,fPt(0.)
+ ,fdX(0.)
+ ,fX0(0.)
+ ,fX(0.)
+ ,fY(0.)
+ ,fZ(0.)
+ ,fS2Y(0.)
+ ,fS2Z(0.)
+ ,fChi2(0.)
{
//
// Copy Constructor performing a deep copy
//
-
- //printf("AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &)\n");
+ if(this != &ref){
+ ref.Copy(*this);
+ }
SetBit(kOwner, kFALSE);
- for(int islice=0; islice < knSlices; islice++) fdEdx[islice] = ref.fdEdx[islice];
- for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = ref.fProb[ispec];
- memcpy(fRefCov, ref.fRefCov, 3*sizeof(Double_t));
- memcpy(fCov, ref.fCov, 3*sizeof(Double_t));
+ SetStandAlone(ref.IsStandAlone());
}
SetBit(kOwner, kFALSE);
return *this;
-
}
//____________________________________________________________________
//printf("I-AliTRDseedV1::~AliTRDseedV1() : Owner[%s]\n", IsOwner()?"YES":"NO");
- if(IsOwner())
- for(int itb=0; itb<knTimebins; itb++){
+ if(IsOwner()) {
+ 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.fClusterIter = 0x0;
+ target.fkReconstructor = fkReconstructor;
+ target.fClusterIter = NULL;
+ target.fExB = fExB;
+ target.fVD = fVD;
+ target.fT0 = fT0;
+ target.fS2PRF = fS2PRF;
+ target.fDiffL = fDiffL;
+ target.fDiffT = fDiffT;
target.fClusterIdx = 0;
+ target.fErrorMsg = fErrorMsg;
+ target.fN = fN;
target.fDet = fDet;
- target.fMom = fMom;
- target.fSnp = fSnp;
- target.fTgl = fTgl;
+ target.fPt = fPt;
target.fdX = fdX;
- target.fXref = fXref;
- target.fExB = fExB;
- target.fReconstructor = fReconstructor;
+ target.fX0 = fX0;
+ target.fX = fX;
+ target.fY = fY;
+ target.fZ = fZ;
+ target.fS2Y = fS2Y;
+ target.fS2Z = fS2Z;
+ target.fChi2 = fChi2;
- for(int islice=0; islice < knSlices; islice++) target.fdEdx[islice] = fdEdx[islice];
- for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) target.fProb[ispec] = fProb[ispec];
- memcpy(target.fRefCov, fRefCov, 3*sizeof(Double_t));
- memcpy(target.fCov, fCov, 3*sizeof(Double_t));
+ memcpy(target.fIndexes, fIndexes, kNclusters*sizeof(Int_t));
+ memcpy(target.fClusters, fClusters, kNclusters*sizeof(AliTRDcluster*));
+ memcpy(target.fPad, fPad, 4*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.fProb, fProb, AliPID::kSPECIES*sizeof(Float_t));
+ memcpy(target.fLabels, fLabels, 3*sizeof(Int_t));
+ memcpy(target.fRefCov, fRefCov, 7*sizeof(Double_t));
+ target.fC[0] = fC[0]; target.fC[1] = fC[1];
+ memcpy(target.fCov, fCov, 3*sizeof(Double_t));
- AliTRDseed::Copy(target);
+ TObject::Copy(ref);
+}
+
+
+//____________________________________________________________
+void AliTRDseedV1::Init(const AliRieman *rieman)
+{
+// Initialize this tracklet using the riemann fit information
+
+
+ fZref[0] = rieman->GetZat(fX0);
+ fZref[1] = rieman->GetDZat(fX0);
+ fYref[0] = rieman->GetYat(fX0);
+ fYref[1] = rieman->GetDYat(fX0);
+ if(fkReconstructor && fkReconstructor->IsHLT()){
+ fRefCov[0] = 1;
+ fRefCov[2] = 10;
+ }else{
+ fRefCov[0] = rieman->GetErrY(fX0);
+ fRefCov[2] = rieman->GetErrZ(fX0);
+ }
+ fC[0] = rieman->GetC();
+ fChi2 = rieman->GetChi2();
}
Double_t y, z;
if(!track->GetProlongation(fX0, y, z)) return kFALSE;
- UpDate(track);
+ Update(track);
return kTRUE;
}
+//_____________________________________________________________________________
+void AliTRDseedV1::Reset(Option_t *opt)
+{
+//
+// 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; SetBit(kRowCross, kFALSE);
+ if(strcmp(opt, "c")==0) return;
+
+ fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.;
+ fDiffL=0.;fDiffT=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]=0.; fC[1]=0.;
+ fChi2 = 0.;
+
+ memset(fPad, 0, 4*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));
+ 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
+ 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)
- fSnp = trk->GetSnp();
- fTgl = trk->GetTgl();
- fMom = trk->GetP();
- fYref[1] = fSnp/(1. - fSnp*fSnp);
- fZref[1] = fTgl;
+ Double_t fSnp = trk->GetSnp();
+ Double_t fTgl = trk->GetTgl();
+ fPt = trk->Pt();
+ Double_t norm =1./TMath::Sqrt((1.-fSnp)*(1.+fSnp));
+ fYref[1] = fSnp*norm;
+ fZref[1] = fTgl*norm;
SetCovRef(trk->GetCovariance());
Double_t dx = trk->GetX() - fX0;
fZref[0] = trk->GetZ() - dx*fZref[1];
}
+//_____________________________________________________________________________
+void AliTRDseedV1::UpdateUsed()
+{
+ //
+ // Calculate number of used clusers in the tracklet
+ //
+
+ Int_t nused = 0, nshared = 0;
+ for (Int_t i = kNclusters; i--; ) {
+ if (!fClusters[i]) continue;
+ if(fClusters[i]->IsUsed()){
+ nused++;
+ } else if(fClusters[i]->IsShared()){
+ if(IsStandAlone()) nused++;
+ else nshared++;
+ }
+ }
+ SetNUsed(nused);
+ SetNShared(nshared);
+}
+
+//_____________________________________________________________________________
+void AliTRDseedV1::UseClusters()
+{
+ //
+ // Use clusters
+ //
+ // In stand alone mode:
+ // Clusters which are marked as used or shared from another track are
+ // removed from the tracklet
+ //
+ // In barrel mode:
+ // - Clusters which are used by another track become shared
+ // - Clusters which are attached to a kink track become shared
+ //
+ AliTRDcluster **c = &fClusters[0];
+ for (Int_t ic=kNclusters; ic--; c++) {
+ if(!(*c)) continue;
+ if(IsStandAlone()){
+ if((*c)->IsShared() || (*c)->IsUsed()){
+ if((*c)->IsShared()) SetNShared(GetNShared()-1);
+ else SetNUsed(GetNUsed()-1);
+ (*c) = NULL;
+ fIndexes[ic] = -1;
+ SetN(GetN()-1);
+ continue;
+ }
+ } else {
+ if((*c)->IsUsed() || IsKink()){
+ (*c)->SetShared();
+ continue;
+ }
+ }
+ (*c)->Use();
+ }
+}
+
+
+
//____________________________________________________________________
void AliTRDseedV1::CookdEdx(Int_t nslices)
{
// Detailed description
// Calculates average dE/dx for all slices. Depending on the PID methode
// the number of slices can be 3 (LQ) or 8(NN).
-// The calculation of dQ/dl are done using the tracklet fit results (see AliTRDseedV1::GetdQdl(Int_t)) i.e.
-//
-// dQ/dl = qc/(dx * sqrt(1 + dy/dx^2 + dz/dx^2))
+// The calculation of dQ/dl are done using the tracklet fit results (see AliTRDseedV1::GetdQdl(Int_t))
//
// The following effects are included in the calculation:
// 1. calibration values for t0 and vdrift (using x coordinate to calculate slice)
// 3. cluster size
//
- Int_t nclusters[knSlices];
- for(int i=0; i<knSlices; i++){
- fdEdx[i] = 0.;
- nclusters[i] = 0;
- }
- Float_t clength = (/*.5 * */AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
+ memset(fdEdx, 0, kNslices*sizeof(Float_t));
+ const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
- AliTRDcluster *cluster = 0x0;
+ AliTRDcluster *c(NULL);
for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){
- if(!(cluster = fClusters[ic])) continue;
- Float_t x = cluster->GetX();
-
+ if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue;
+ Float_t dx = TMath::Abs(fX0 - c->GetX());
+
// Filter clusters for dE/dx calculation
-
+
// 1.consider calibration effects for slice determination
- Int_t slice;
- if(cluster->IsInChamber()) slice = Int_t(TMath::Abs(fX0 - x) * nslices / clength);
- else slice = x < fX0 ? 0 : nslices-1;
-
+ Int_t slice;
+ if(dx<kDriftLength){ // TODO should be replaced by c->IsInChamber()
+ slice = Int_t(dx * nslices / kDriftLength);
+ } else slice = c->GetX() < fX0 ? nslices-1 : 0;
+
+
// 2. take sharing into account
- Float_t w = cluster->IsShared() ? .5 : 1.;
-
+ Float_t w = /*c->IsShared() ? .5 :*/ 1.;
+
// 3. take into account large clusters TODO
//w *= c->GetNPads() > 3 ? .8 : 1.;
-
+
//CHECK !!!
fdEdx[slice] += w * GetdQdl(ic); //fdQdl[ic];
- nclusters[slice]++;
} // End of loop over clusters
+}
- //if(fReconstructor->GetPIDMethod() == AliTRDReconstructor::kLQPID){
- if(nslices == AliTRDReconstructor::kLQslices){
- // calculate mean charge per slice (only LQ PID)
- for(int is=0; is<nslices; is++){
- if(nclusters[is]) fdEdx[is] /= nclusters[is];
+//_____________________________________________________________________________
+void AliTRDseedV1::CookLabels()
+{
+ //
+ // Cook 2 labels for seed
+ //
+
+ Int_t labels[200];
+ Int_t out[200];
+ Int_t nlab = 0;
+ 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) {
+ labels[nlab] = fClusters[i]->GetLabel(ilab);
+ nlab++;
+ }
}
}
+
+ fLabels[2] = AliMathBase::Freq(nlab,labels,out,kTRUE);
+ fLabels[0] = out[0];
+ if ((fLabels[2] > 1) && (out[3] > 1)) fLabels[1] = out[2];
+}
+
+//____________________________________________________________
+Float_t AliTRDseedV1::GetAnodeWireOffset(Float_t zt)
+{
+// Find position inside the amplification cell for reading drift velocity map
+
+ Float_t d = fPad[3] - zt;
+ if(d<0.){
+ AliError(Form("Fail AnodeWireOffset calculation z0[%+7.2f] zt[%+7.2f] d[%+7.2f].", fPad[3], zt, d));
+ return 0.125;
+ }
+ d -= ((Int_t)(2 * d)) / 2.0;
+ if(d > 0.25) d = 0.5 - d;
+ return d;
+}
+
+
+//____________________________________________________________________
+Float_t AliTRDseedV1::GetCharge(Bool_t useOutliers) const
+{
+// Computes total charge attached to tracklet. If "useOutliers" is set clusters
+// which are not in chamber are also used (default false)
+
+ AliTRDcluster *c(NULL); Float_t qt(0.);
+ for(int ic=0; ic<kNclusters; ic++){
+ if(!(c=fClusters[ic])) continue;
+ if(c->IsInChamber() && !useOutliers) continue;
+ qt += TMath::Abs(c->GetQ());
+ }
+ return qt;
}
//____________________________________________________________________
-void AliTRDseedV1::GetClusterXY(const AliTRDcluster *c, Double_t &x, Double_t &y)
+Bool_t AliTRDseedV1::GetEstimatedCrossPoint(Float_t &x, Float_t &z) const
{
-// 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;
+// Algorithm to estimate cross point in the x-z plane for pad row cross tracklets.
+// Returns true in case of success.
+ if(!IsRowCross()) return kFALSE;
+
+ x=0.; z=0.;
+ AliTRDcluster *c(NULL);
+ // Find radial range for first row
+ Float_t x1[] = {0., 1.e3};
+ for(int ic=0; ic<kNtb; ic++){
+ if(!(c=fClusters[ic])) continue;
+ if(!c->IsInChamber()) continue;
+ if(c->GetX() <= x1[1]) x1[1] = c->GetX();
+ if(c->GetX() >= x1[0]) x1[0] = c->GetX();
+ z=c->GetZ();
+ }
+ if((x1[0] - x1[1])<1.e-5) return kFALSE;
+
+ // Find radial range for second row
+ Bool_t kZ(kFALSE);
+ Float_t x2[] = {0., 1.e3};
+ for(int ic=kNtb; ic<kNclusters; ic++){
+ if(!(c=fClusters[ic])) continue;
+ if(!c->IsInChamber()) continue;
+ if(c->GetX() <= x2[1]) x2[1] = c->GetX();
+ if(c->GetX() >= x2[0]) x2[0] = c->GetX();
+ if(!kZ){
+ z+=c->GetZ();
+ z*=0.5;
+ kZ=kTRUE;
+ }
+ }
+ if((x2[0] - x2[1])<1.e-5) return kFALSE;
+
+ // Find intersection of the 2 radial regions
+ x = 0.5*((x1[0]+x1[1] > x2[0]+x2[1]) ? (x1[1]+x2[0]) : (x1[0]+x2[1]));
+ return kTRUE;
}
//____________________________________________________________________
-Float_t AliTRDseedV1::GetdQdl(Int_t ic) const
+Float_t AliTRDseedV1::GetdQdl() const
{
- return fClusters[ic] ? TMath::Abs(fClusters[ic]->GetQ()) /fdX / TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]) : 0.;
+// Calculate total charge / tracklet length for 1D PID
+//
+ Float_t Q = GetCharge(kTRUE);
+ return Q/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]);
}
//____________________________________________________________________
-Double_t* AliTRDseedV1::GetProbability()
+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{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.
+// 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.;
+ // 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());
+ }
+ 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;
+ if(dx>1.e-9) return dq/dx;
+ else return 0.;
+}
+
+//____________________________________________________________
+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
+//
+
+ 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::GetOccupancyTB() const
+{
+// Returns procentage of TB occupied by clusters
+
+ Int_t n(0);
+ AliTRDcluster *c(NULL);
+ for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){
+ if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue;
+ n++;
+ }
+
+ return Float_t(n)/AliTRDtrackerV1::GetNTimeBins();
+}
+
+//____________________________________________________________________
+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()));
// 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]));
+ Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick())/ TMath::Sqrt((1.0 - GetSnp()*GetSnp()) / (1.0 + GetTgl()*GetTgl()));
//calculate dE/dx
- CookdEdx(fReconstructor->GetNdEdxSlices());
-
- // Sets the a priori probabilities
- for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
- fProb[ispec] = pd->GetProbability(ispec, fMom, &fdEdx[0], length, GetPlane());
- }
+ CookdEdx(AliTRDCalPID::kNSlicesNN);
+ AliDebug(4, Form("p=%6.4f[GeV/c] dEdx{%7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f} l=%4.2f[cm]", GetMomentum(), fdEdx[0], fdEdx[1], fdEdx[2], fdEdx[3], fdEdx[4], fdEdx[5], fdEdx[6], fdEdx[7], length));
- return &fProb[0];
+ // Sets the a priori probabilities
+ Bool_t kPIDNN(fkReconstructor->GetPIDMethod()==AliTRDpidUtil::kNN);
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++)
+ fProb[ispec] = pd->GetProbability(ispec, GetMomentum(), &fdEdx[0], length, kPIDNN?GetPlane():fkReconstructor->GetRecoParam()->GetPIDLQslices());
+
+ return kTRUE;
}
//____________________________________________________________________
// Returns a quality measurement of the current seed
//
- Float_t zcorr = kZcorr ? fTilt * (fZProb - 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(fMeanz - 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];
-
- // rotate covariance matrix
- Double_t t2 = fTilt*fTilt;
- Double_t correction = 1./(1. + t2);
- cov[0] = (sy2+t2*sz2)*correction;
- cov[1] = fTilt*(sz2 - sy2)*correction;
- cov[2] = (t2*sy2+sz2)*correction;
+ 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 if no RC
+ if(!IsRowCross()){
+ Double_t t2 = GetTilt()*GetTilt();
+ Double_t correction = 1./(1. + t2);
+ cov[0] = (sy2+t2*sz2)*correction;
+ cov[1] = GetTilt()*(sz2 - sy2)*correction;
+ cov[2] = (t2*sy2+sz2)*correction;
+ } else {
+ cov[0] = sy2; cov[1] = 0.; cov[2] = sy2;
+ }
+
+ AliDebug(4, Form("C(%6.1f %+6.3f %6.1f) RC[%c]", 1.e4*TMath::Sqrt(cov[0]), cov[1], 1.e4*TMath::Sqrt(cov[2]), IsRowCross()?'y':'n'));
+}
+
+//____________________________________________________________
+Int_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
+
+ const Double_t kZero(1.e-20);
+ 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)<kZero) return 1;
+ Double_t dd = TMath::Sqrt(tr*tr - 4*det);
+ l[0] = .5*(tr + dd*(c[0]>c[2]?-1.:1.));
+ l[1] = .5*(tr + dd*(c[0]>c[2]?1.:-1.));
+ if(l[0]<kZero || l[1]<kZero) return 2;
+ // the sym V matrix
+ // | v00 v10|
+ // | v10 v11|
+ Double_t den = (l[0]-c[0])*(l[0]-c[0])+c[1]*c[1];
+ if(den<kZero){ // almost diagonal
+ v[0] = TMath::Sign(0., c[1]);
+ v[1] = TMath::Sign(1., (l[0]-c[0]));
+ v[2] = TMath::Sign(0., c[1]*(l[0]-c[0])*(l[1]-c[2]));
+ } else {
+ Double_t tmp = 1./TMath::Sqrt(den);
+ v[0] = c[1]* tmp;
+ v[1] = (l[0]-c[0])*tmp;
+ if(TMath::Abs(l[1]-c[2])<kZero) v[2] = TMath::Sign(v[0]*(l[0]-c[0])/kZero, (l[1]-c[2]));
+ else v[2] = v[0]*(l[0]-c[0])/(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 0;
+}
+
+//____________________________________________________________
+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
+{
+// Returns geometry volume id by delegation
+
+ for(Int_t ic(0);ic<kNclusters; ic++){
+ if(fClusters[ic]) return fClusters[ic]->GetVolumeId();
+ }
+ return 0;
}
//____________________________________________________________________
-void AliTRDseedV1::SetExB()
+void AliTRDseedV1::Calibrate()
{
-// Retrive the tg(a_L) from OCDB. The following information are used
+// Retrieve calibration and position parameters from OCDB.
+// The following information are used
// - detector index
-// - column and row position of first attached cluster.
-//
-// If no clusters are attached to the tracklet a random central chamber
-// position (c=70, r=7) will be used to retrieve the drift velocity.
+// - column and row position of first attached cluster. If no clusters are attached
+// to the tracklet a random central chamber position (c=70, r=7) will be used.
+//
+// The following information is cached in the tracklet
+// t0 (trigger delay)
+// drift velocity
+// PRF width
+// omega*tau = tg(a_L)
+// diffusion coefficients (longitudinal and transversal)
//
// Author :
// Alex Bercuci <A.Bercuci@gsi.de>
return;
}
- AliTRDcalibDB *fCalib = AliTRDcalibDB::Instance();
- AliTRDCalROC *fCalVdriftROC = fCalib->GetVdriftROC(fDet);
- const AliTRDCalDet *fCalVdriftDet = fCalib->GetVdriftDet();
+ AliTRDcalibDB *calib = AliTRDcalibDB::Instance();
+ AliTRDCalROC *vdROC = calib->GetVdriftROC(fDet),
+ *t0ROC = calib->GetT0ROC(fDet);;
+ const AliTRDCalDet *vdDet = calib->GetVdriftDet();
+ const AliTRDCalDet *t0Det = calib->GetT0Det();
Int_t col = 70, row = 7;
AliTRDcluster **c = &fClusters[0];
- if(fN){
+ if(GetN()){
Int_t ic = 0;
- while (ic<AliTRDseed::knTimebins && !(*c)){ic++; c++;}
+ while (ic<kNclusters && !(*c)){ic++; c++;}
if(*c){
col = (*c)->GetPadCol();
row = (*c)->GetPadRow();
}
}
- Double_t vd = fCalVdriftDet->GetValue(fDet) * fCalVdriftROC->GetValue(col, row);
- fExB = fCalib->GetOmegaTau(vd, -0.1*AliTracker::GetBz());
+ 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);
+ AliTRDCommonParam::Instance()->GetDiffCoeff(fDiffL,
+ fDiffT, fVD);
+ AliDebug(4, Form("Calibration params for Det[%3d] Col[%3d] Row[%2d]\n t0[%f] vd[%f] s2PRF[%f] ExB[%f] Dl[%f] Dt[%f]", fDet, col, row, fT0, fVD, fS2PRF, fExB, fDiffL, fDiffT));
+
+
+ SetBit(kCalib, kTRUE);
}
//____________________________________________________________________
//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)
+//____________________________________________________________
+void AliTRDseedV1::SetPadPlane(AliTRDpadPlane * const p)
{
- //
- // 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 * (fZProb - 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]; Int_t tb[2];
- 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;
- }
- fdX = (x[1] - x[0]) / (tb[0] - tb[1]);
-
- // 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();
- }
-
- AliTRDseed::Update();
- }
- 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;
+// Shortcut method to initialize pad geometry.
+ fPad[0] = p->GetLengthIPad();
+ fPad[1] = p->GetWidthIPad();
+ fPad[2] = TMath::Tan(TMath::DegToRad()*p->GetTiltingAngle());
+ fPad[3] = p->GetRow0() + p->GetAnodeWireOffset();
+}
- if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=1) CookLabels();
- // set ExB angle
- SetExB();
- UpdateUsed();
- return kTRUE;
-}
//____________________________________________________________________
-Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *chamber, Bool_t tilt)
+Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *const chamber, Bool_t tilt, Bool_t chgPos, Int_t ev)
{
- //
- // 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() ){
- AliError("Seed can not be used without a valid RecoParam.");
+//
+// 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 = 2 for calibration
+// level = 3 for visualization in the track SR
+// level = 4 for full visualization including digit level
+
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it
+
+ if(!recoParam){
+ AliError("Tracklets can not be used without a valid RecoParam.");
return kFALSE;
}
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if (!calibration) {
+ AliError("No access to calibration data");
+ return kFALSE;
+ }
+ // Retrieve the CDB container class with the parametric likelihood
+ const AliTRDCalTrkAttach *attach = calibration->GetAttachObject();
+ if (!attach) {
+ AliError("No usable AttachClusters calib object.");
+ 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(recoParam->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins());
+ Int_t kTBmin = 4;
+
+ Double_t sysCov[5]; recoParam->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);
+ const Double_t kroady = 3.; //recoParam->GetRoad1y();
+ const Double_t kroadz = GetPadLength() * recoParam->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);
+ if(!IsCalibrated()) Calibrate();
+
+ Int_t kroadyShift(0);
+ Float_t bz(AliTrackerBase::GetBz());
+ if(TMath::Abs(bz)>2.){
+ if(bz<0.) kroadyShift = chgPos ? +1 : -1;
+ else kroadyShift = chgPos ? -1 : +1;
+ }
+ AliDebug(4, Form("\n syTrk[cm]=%4.2f dydxTrk[deg]=%+6.2f rs[%d] Chg[%c] rY[cm]=%4.2f rZ[cm]=%5.2f TC[%c]", syRef, TMath::ATan(fYref[1])*TMath::RadToDeg(), kroadyShift, chgPos?'+':'-', kroady, kroadz, tilt?'y':'n'));
+ Double_t phiTrk(TMath::ATan(fYref[1])),
+ thtTrk(TMath::ATan(fZref[1]));
// 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
+ TObjArray clst[kNrows];
+ Bool_t blst[kNrows][kNcls];
+ Double_t cond[4],
+ dx, dy, dz,
+ yt, zt,
+ zc[kNrows],
+ xres[kNrows][kNcls], yres[kNrows][kNcls], zres[kNrows][kNcls], s2y[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*));
-
- // Do cluster projection
- AliTRDcluster *c = 0x0;
- AliTRDchamberTimeBin *layer = 0x0;
+ memset(zc, 0, kNrows*sizeof(Double_t));
+ memset(idxs, 0, kNrows*kNcls*sizeof(Int_t));
+ memset(xres, 0, kNrows*kNcls*sizeof(Double_t));
+ memset(yres, 0, kNrows*kNcls*sizeof(Double_t));
+ memset(zres, 0, kNrows*kNcls*sizeof(Double_t));
+ memset(s2y, 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*))"
+
+ Double_t roady(0.), s2Mean(0.), sMean(0.); Int_t ns2Mean(0);
+
+ // Do cluster projection and pick up cluster candidates
+ 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);
-
- // select clusters on a 5 sigmaKalman level
- cond[0] = yt; cond[2] = kroady;
+ // get standard cluster error corrected for tilt if selected
+ cp.SetLocalTimeBin(it);
+ cp.SetSigmaY2(0.02, fDiffT, fExB, dx, -1./*zt*/, fYref[1]);
+ s2yCl = cp.GetSigmaY2() + sysCov[0]; if(!tilt) s2yCl = (s2yCl + t2*s2zCl)/(1.+t2);
+ if(TMath::Abs(it-12)<7){ s2Mean += cp.GetSigmaY2(); ns2Mean++;}
+ // get estimated road in r-phi direction
+ roady = TMath::Min(3.*TMath::Sqrt(12.*(s2yTrk + s2yCl)), kroady);
+
+ AliDebug(5, Form("\n"
+ " %2d xd[cm]=%6.3f yt[cm]=%7.2f zt[cm]=%8.2f\n"
+ " syTrk[um]=%6.2f syCl[um]=%6.2f syClTlt[um]=%6.2f\n"
+ " Ry[mm]=%f"
+ , it, dx, yt, zt
+ , 1.e4*TMath::Sqrt(s2yTrk), 1.e4*TMath::Sqrt(cp.GetSigmaY2()+sysCov[0]), 1.e4*TMath::Sqrt(s2yCl)
+ , 1.e1*roady));
+
+ // get clusters from layer
+ cond[0] = yt/*+0.5*kroadyShift*kroady*/; cond[2] = roady;
cond[1] = zt; cond[3] = kroadz;
- Int_t n=0, idx[6];
- layer->GetClusters(cond, idx, n, 6);
+ Int_t n=0, idx[6]; layer->GetClusters(cond, idx, n, 6);
for(Int_t ic = n; ic--;){
c = (*layer)[idx[ic]];
- dy = yt - c->GetY();
- dy += tilt ? fTilt * (c->GetZ() - zt) : 0.;
- // select clusters on a 3 sigmaKalman level
-/* if(tilt && TMath::Abs(dy) > 3.*syRef){
- printf("too large !!!\n");
- continue;
- }*/
+ dx = fX0 - c->GetX();
+ yt = fYref[0] - fYref[1] * dx;
+ zt = fZref[0] - fZref[1] * dx;
+ dz = zt - c->GetZ();
+ dy = yt - (c->GetY() + (tilt ? (GetTilt() * dz) : 0.));
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);
- clst[r][ncl[r]] = c;
+ clst[r].AddAtAndExpand(c, ncl[r]);
+ blst[r][ncl[r]] = kTRUE;
idxs[r][ncl[r]] = idx[ic];
+ zres[r][ncl[r]] = dz/GetPadLength();
yres[r][ncl[r]] = dy;
+ xres[r][ncl[r]] = dx;
+ zc[r] = c->GetZ();
+ // TODO temporary solution to avoid divercences in error parametrization
+ s2y[r][ncl[r]] = TMath::Min(c->GetSigmaY2()+sysCov[0], 0.025);
+ AliDebug(5, Form(" -> dy[cm]=%+7.4f yc[cm]=%7.2f row[%d] idx[%2d]", dy, c->GetY(), r, ncl[r]));
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 row[%d] reached buffer limit[%d]. Some may be lost.", r, kNcls));
kBUFFER = kTRUE;
break;
}
}
if(kBUFFER) break;
}
- if(kPRINT) printf("Found %d clusters\n", ncls);
- if(ncls<kClmin) 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");
+ if(ncls<kClmin){
+ AliDebug(1, Form("CLUSTERS FOUND %d LESS THAN THRESHOLD %d.", ncls, kClmin));
+ SetErrorMsg(kAttachClFound);
+ for(Int_t ir(kNrows);ir--;) clst[ir].Clear();
+ return kFALSE;
+ }
+ if(ns2Mean<kTBmin){
+ AliDebug(1, Form("CLUSTERS IN TimeBins %d LESS THAN THRESHOLD %d.", ns2Mean, kTBmin));
+ SetErrorMsg(kAttachClFound);
+ for(Int_t ir(kNrows);ir--;) clst[ir].Clear();
+ return kFALSE;
+ }
+ s2Mean /= ns2Mean; sMean = TMath::Sqrt(s2Mean);
+ //Double_t sRef(TMath::Sqrt(s2Mean+s2yTrk)); // reference error parameterization
+
+ // organize row candidates
+ Int_t idxRow[kNrows], nrc(0); Double_t zresRow[kNrows];
+ for(Int_t ir(0); ir<kNrows; ir++){
+ idxRow[ir]=-1; zresRow[ir] = 999.;
+ if(!ncl[ir]) continue;
+ // get mean z resolution
+ dz = 0.; for(Int_t ic = ncl[ir]; ic--;) dz += zres[ir][ic]; dz/=ncl[ir];
+ // insert row
+ idxRow[nrc] = ir; zresRow[nrc] = TMath::Abs(dz); nrc++;
+ }
+ AliDebug(4, Form("Found %d clusters in %d rows. Sorting ...", ncls, nrc));
+
+ // sort row candidates
+ if(nrc>=2){
+ if(nrc==2){
+ if(zresRow[0]>zresRow[1]){ // swap
+ Int_t itmp=idxRow[1]; idxRow[1] = idxRow[0]; idxRow[0] = itmp;
+ Double_t dtmp=zresRow[1]; zresRow[1] = zresRow[0]; zresRow[0] = dtmp;
+ }
+ if(TMath::Abs(idxRow[1] - idxRow[0]) != 1){
+ SetErrorMsg(kAttachRowGap);
+ AliDebug(2, Form("Rows attached not continuous. Select first candidate.\n"
+ " row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f",
+ idxRow[0], ncl[idxRow[0]], zresRow[0], idxRow[1], ncl[idxRow[1]], zresRow[1]));
+ nrc=1; idxRow[1] = -1; zresRow[1] = 999.;
+ }
+ } else {
+ Int_t idx0[kNrows];
+ TMath::Sort(nrc, zresRow, idx0, kFALSE);
+ nrc = 3; // select only maximum first 3 candidates
+ Int_t iatmp[] = {-1, -1, -1}; Double_t datmp[] = {999., 999., 999.};
+ for(Int_t irc(0); irc<nrc; irc++){
+ iatmp[irc] = idxRow[idx0[irc]];
+ datmp[irc] = zresRow[idx0[irc]];
+ }
+ idxRow[0] = iatmp[0]; zresRow[0] = datmp[0];
+ idxRow[1] = iatmp[1]; zresRow[1] = datmp[1];
+ idxRow[2] = iatmp[2]; zresRow[2] = datmp[2]; // temporary
+ if(TMath::Abs(idxRow[1] - idxRow[0]) != 1){
+ SetErrorMsg(kAttachRowGap);
+ AliDebug(2, Form("Rows attached not continuous. Turn on selection.\n"
+ "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f\n"
+ "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f\n"
+ "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f",
+ idxRow[0], ncl[idxRow[0]], zresRow[0],
+ idxRow[1], ncl[idxRow[1]], zresRow[1],
+ idxRow[2], ncl[idxRow[2]], zresRow[2]));
+ if(TMath::Abs(idxRow[0] - idxRow[2]) == 1){ // select second candidate
+ AliDebug(2, "Solved ! Remove second candidate.");
+ nrc = 2;
+ idxRow[1] = idxRow[2]; zresRow[1] = zresRow[2]; // swap
+ idxRow[2] = -1; zresRow[2] = 999.; // remove
+ } else if(TMath::Abs(idxRow[1] - idxRow[2]) == 1){
+ if(ncl[idxRow[1]]+ncl[idxRow[2]] > ncl[idxRow[0]]){
+ AliDebug(2, "Solved ! Remove first candidate.");
+ nrc = 2;
+ idxRow[0] = idxRow[1]; zresRow[0] = zresRow[1]; // swap
+ idxRow[1] = idxRow[2]; zresRow[1] = zresRow[2]; // swap
+ } else {
+ AliDebug(2, "Solved ! Remove second and third candidate.");
+ nrc = 1;
+ idxRow[1] = -1; zresRow[1] = 999.; // remove
+ idxRow[2] = -1; zresRow[2] = 999.; // remove
+ }
+ } else {
+ AliDebug(2, "Unsolved !!! Remove second and third candidate.");
+ nrc = 1;
+ idxRow[1] = -1; zresRow[1] = 999.; // remove
+ idxRow[2] = -1; zresRow[2] = 999.; // remove
+ }
+ } else { // remove temporary candidate
+ nrc = 2;
+ idxRow[2] = -1; zresRow[2] = 999.;
+ }
+ }
+ }
+ AliDebug(4, Form("Sorted row candidates:\n"
+ " row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f"
+ , idxRow[0], ncl[idxRow[0]], zresRow[0], idxRow[1], ncl[idxRow[1]], zresRow[1]));
+
+ // initialize debug streamer
+ TTreeSRedirector *pstreamer(NULL);
+ if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(pstreamer){
+ // save config. for calibration
+ TVectorD vdy[2], vdx[2], vs2[2];
+ for(Int_t jr(0); jr<nrc; jr++){
+ Int_t ir(idxRow[jr]);
+ vdx[jr].ResizeTo(ncl[ir]); vdy[jr].ResizeTo(ncl[ir]); vs2[jr].ResizeTo(ncl[ir]);
+ for(Int_t ic(ncl[ir]); ic--;){
+ vdx[jr](ic) = xres[ir][ic];
+ vdy[jr](ic) = yres[ir][ic];
+ vs2[jr](ic) = s2y[ir][ic];
+ }
}
- if(kPRINT) printf("\tir[%d] lr[%d] n[%d]\n", ir, lr, 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.;
- }
-
- // 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);
- // 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;
+ (*pstreamer) << "AttachClusters4"
+ << "r0=" << idxRow[0]
+ << "dz0=" << zresRow[0]
+ << "dx0=" << &vdx[0]
+ << "dy0=" << &vdy[0]
+ << "s20=" << &vs2[0]
+ << "r1=" << idxRow[1]
+ << "dz1=" << zresRow[1]
+ << "dx1=" << &vdx[1]
+ << "dy1=" << &vdy[1]
+ << "s21=" << &vs2[1]
+ << "\n";
+ vdx[0].Clear(); vdy[0].Clear(); vs2[0].Clear();
+ vdx[1].Clear(); vdy[1].Clear(); vs2[1].Clear();
+ if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 4){
+ Int_t idx(idxRow[1]);
+ if(idx<0){
+ for(Int_t ir(0); ir<kNrows; ir++){
+ if(clst[ir].GetEntries()>0) continue;
+ idx = ir;
+ break;
+ }
+ }
+ (*pstreamer) << "AttachClusters5"
+ << "c0.=" << &clst[idxRow[0]]
+ << "c1.=" << &clst[idx]
+ << "\n";
+ }
+ }
+
+//=======================================================================================
+ // Analyse cluster topology
+ Double_t f[kNcls], // likelihood factors for segments
+ r[2][kNcls], // d(dydx) of tracklet candidate with respect to track
+ xm[2][kNcls], // mean <x>
+ ym[2][kNcls], // mean <y>
+ sm[2][kNcls], // mean <s_y>
+ s[2][kNcls], // sigma_y
+ p[2][kNcls]; // prob of Gauss
+ memset(f, 0, kNcls*sizeof(Double_t));
+ Int_t index[2][kNcls], n[2][kNcls];
+ memset(n, 0, 2*kNcls*sizeof(Int_t));
+ Int_t mts(0), nts[2] = {0, 0}; // no of tracklet segments in row
+ AliTRDpadPlane *pp(AliTRDtransform::Geometry().GetPadPlane(fDet));
+ AliTRDtrackletOflHelper helper;
+ Int_t lyDet(AliTRDgeometry::GetLayer(fDet));
+ for(Int_t jr(0), n0(0); jr<nrc; jr++){
+ Int_t ir(idxRow[jr]);
+ // cluster segmentation
+ Bool_t kInit(kFALSE);
+ if(jr==0){
+ n0 = helper.Init(pp, &clst[ir]); kInit = kTRUE;
+ if(!n0 || (helper.ClassifyTopology() == AliTRDtrackletOflHelper::kNormal)){
+ nts[jr] = 1; memset(index[jr], 0, ncl[ir]*sizeof(Int_t));
+ n[jr][0] = ncl[ir];
}
- nrow[nr]++; kFOUND = kTRUE;
}
- // exit loop
- 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]);
-
- // classify cluster rows
- Int_t row = -1;
- switch(nr){
- case 1:
- row = lr;
- break;
- case 2:
- SetBit(kRowCross, kTRUE); // mark pad row crossing
- if(nrow[0] > nrow[1]){ row = lr+1; lr = -1;}
- else{
- row = lr; lr = 1;
- nrow[2] = nrow[1];
- nrow[1] = nrow[0];
- nrow[0] = nrow[2];
+ if(!n[jr][0]){
+ nts[jr] = AliTRDtrackletOflHelper::Segmentation(ncl[ir], xres[ir], yres[ir], index[jr]);
+ for(Int_t ic(ncl[ir]);ic--;) n[jr][index[jr][ic]]++;
}
- break;
- case 3:
- 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;
-
- // Select and store clusters
- // We should consider here :
- // 1. How far is the chamber boundary
- // 2. How big is the mean
- fN2 = 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);
- for (Int_t ic = 0; ic < ncl[jr]; ic++) {
- if(!(c = clst[jr][ic])) continue;
- Int_t it = c->GetPadTime();
- // TODO proper indexing of clusters !!
- fIndexes[it+35*ir] = chamber->GetTB(it)->GetGlobalIndex(idxs[jr][ic]);
- fClusters[it+35*ir] = c;
+ mts += nts[jr];
+
+ // tracklet segment processing
+ for(Int_t its(0); its<nts[jr]; its++){
+ if(n[jr][its]<=2) { // don't touch small segments
+ xm[jr][its] = 0.;ym[jr][its] = 0.;sm[jr][its] = 0.;
+ for(Int_t ic(ncl[ir]); ic--;){
+ if(its != index[jr][ic]) continue;
+ ym[jr][its] += yres[ir][ic];
+ xm[jr][its] += xres[ir][ic];
+ sm[jr][its] += TMath::Sqrt(s2y[ir][ic]);
+ }
+ if(n[jr][its]==2){ xm[jr][its] *= 0.5; ym[jr][its] *= 0.5; sm[jr][its] *= 0.5;}
+ xm[jr][its]= fX0 - xm[jr][its];
+ r[jr][its] = 0.;
+ s[jr][its] = 1.e-5;
+ p[jr][its] = 1.;
+ continue;
+ }
+
+ // for longer tracklet segments
+ if(!kInit) n0 = helper.Init(pp, &clst[ir], index[jr], its);
+ Int_t n1 = helper.GetRMS(r[jr][its], ym[jr][its], s[jr][its], xm[jr][its]);
+ p[jr][its] = Double_t(n1)/n0;
+ sm[jr][its] = helper.GetSyMean();
+
+ Double_t dxm= fX0 - xm[jr][its];
+ yt = fYref[0] - fYref[1]*dxm;
+ zt = fZref[0] - fZref[1]*dxm;
+ // correct tracklet fit for tilt
+ ym[jr][its]+= GetTilt()*(zt - zc[ir]);
+ r[jr][its] += GetTilt() * fZref[1];
+ // correct tracklet fit for track position/inclination
+ ym[jr][its]= yt - ym[jr][its];
+ r[jr][its] = (r[jr][its] - fYref[1])/(1+r[jr][its]*fYref[1]);
+ // report inclination in radians
+ r[jr][its] = TMath::ATan(r[jr][its]);
+ if(jr) continue; // calculate only for first row likelihoods
+
+ f[its] = attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n[jr][its], ym[jr][its]/*sRef*/, r[jr][its]*TMath::RadToDeg(), s[jr][its]/sm[jr][its]);
+ }
+ }
+ AliDebug(4, Form(" Tracklet candidates: row[%2d] = %2d row[%2d] = %2d:", idxRow[0], nts[0], idxRow[1], nts[1]));
+ if(AliLog::GetDebugLevel("TRD", "AliTRDseedV1")>3){
+ for(Int_t jr(0); jr<nrc; jr++){
+ Int_t ir(idxRow[jr]);
+ for(Int_t its(0); its<nts[jr]; its++){
+ printf(" segId[%2d] row[%2d] Ncl[%2d] x[cm]=%7.2f dz[pu]=%4.2f dy[mm]=%+7.3f r[deg]=%+6.2f p[%%]=%6.2f s[um]=%7.2f\n",
+ its, ir, n[jr][its], xm[jr][its], zresRow[jr], 1.e1*ym[jr][its], r[jr][its]*TMath::RadToDeg(), 100.*p[jr][its], 1.e4*s[jr][its]);
+ }
+ }
+ }
+ if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 2 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(pstreamer){
+ // save config. for calibration
+ TVectorD vidx, vn, vx, vy, vr, vs, vsm, vp, vf;
+ vidx.ResizeTo(ncl[idxRow[0]]+(idxRow[1]<0?0:ncl[idxRow[1]]));
+ vn.ResizeTo(mts);
+ vx.ResizeTo(mts);
+ vy.ResizeTo(mts);
+ vr.ResizeTo(mts);
+ vs.ResizeTo(mts);
+ vsm.ResizeTo(mts);
+ vp.ResizeTo(mts);
+ vf.ResizeTo(mts);
+ for(Int_t jr(0), jts(0), jc(0); jr<nrc; jr++){
+ Int_t ir(idxRow[jr]);
+ for(Int_t its(0); its<nts[jr]; its++, jts++){
+ vn[jts] = n[jr][its];
+ vx[jts] = xm[jr][its];
+ vy[jts] = ym[jr][its];
+ vr[jts] = r[jr][its];
+ vs[jts] = s[jr][its];
+ vsm[jts]= sm[jr][its];
+ vp[jts] = p[jr][its];
+ vf[jts] = jr?-1.:f[its];
+ }
+ for(Int_t ic(0); ic<ncl[ir]; ic++, jc++) vidx[jc] = index[jr][ic];
+ }
+ (*pstreamer) << "AttachClusters3"
+ << "idx=" << &vidx
+ << "n=" << &vn
+ << "x=" << &vx
+ << "y=" << &vy
+ << "r=" << &vr
+ << "s=" << &vs
+ << "sm=" << &vsm
+ << "p=" << &vp
+ << "f=" << &vf
+ << "\n";
+ }
+
+//=========================================================
+ // Get seed tracklet segment
+ Int_t idx2[kNcls]; memset(idx2, 0, kNcls*sizeof(Int_t)); // seeding indexing
+ if(nts[0]>1) TMath::Sort(nts[0], f, idx2);
+ Int_t is(idx2[0]); // seed index
+ Int_t idxTrklt[kNcls],
+ kts(0),
+ nTrklt(n[0][is]);
+ Double_t fTrklt(f[is]),
+ rTrklt(r[0][is]),
+ yTrklt(ym[0][is]),
+ sTrklt(s[0][is]),
+ smTrklt(sm[0][is]),
+ xTrklt(xm[0][is]),
+ pTrklt(p[0][is]);
+ memset(idxTrklt, 0, kNcls*sizeof(Int_t));
+ // check seed idx2[0] exit if not found
+ if(f[is]<1.e-2){
+ AliDebug(1, Form("Seed seg[%d] row[%2d] n[%2d] f[%f]<0.01.", is, idxRow[0], n[0][is], f[is]));
+ SetErrorMsg(kAttachClAttach);
+ if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(pstreamer){
+ UChar_t stat(0);
+ if(IsKink()) SETBIT(stat, 1);
+ if(IsStandAlone()) SETBIT(stat, 2);
+ if(IsRowCross()) SETBIT(stat, 3);
+ SETBIT(stat, 4); // set error bit
+ TVectorD vidx; vidx.ResizeTo(1); vidx[0] = is;
+ (*pstreamer) << "AttachClusters2"
+ << "stat=" << stat
+ << "ev=" << ev
+ << "chg=" << chgPos
+ << "det=" << fDet
+ << "x0=" << fX0
+ << "y0=" << fYref[0]
+ << "z0=" << fZref[0]
+ << "phi=" << phiTrk
+ << "tht=" << thtTrk
+ << "pt=" << fPt
+ << "s2Trk=" << s2yTrk
+ << "s2Cl=" << s2Mean
+ << "idx=" << &vidx
+ << "n=" << nTrklt
+ << "f=" << fTrklt
+ << "x=" << xTrklt
+ << "y=" << yTrklt
+ << "r=" << rTrklt
+ << "s=" << sTrklt
+ << "sm=" << smTrklt
+ << "p=" << pTrklt
+ << "\n";
+ }
+ return kFALSE;
+ }
+ AliDebug(2, Form("Seed seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%5.3f]", is, idxRow[0], n[0][is], ym[0][is], r[0][is]*TMath::RadToDeg(), s[0][is]/sm[0][is], f[is]));
+
+ // save seeding segment in the helper
+ idxTrklt[kts++] = is;
+ helper.Init(pp, &clst[idxRow[0]], index[0], is);
+ AliTRDtrackletOflHelper test; // helper to test segment expantion
+ Float_t rcLikelihood(0.); SetBit(kRowCross, kFALSE);
+ Double_t dyRez[kNcls]; Int_t idx3[kNcls];
- //printf("\tid[%2d] it[%d] idx[%d]\n", ic, it, fIndexes[it]);
+ //=========================================================
+ // Define filter parameters from OCDB
+ Int_t kNSgmDy[2]; attach->GetNsgmDy(kNSgmDy[0], kNSgmDy[1]);
+ Float_t kLikeMinRelDecrease[2]; attach->GetLikeMinRelDecrease(kLikeMinRelDecrease[0], kLikeMinRelDecrease[1]);
+ Float_t kRClikeLimit(attach->GetRClikeLimit());
+
+ //=========================================================
+ // Try attaching next segments from first row (if any)
+ if(nts[0]>1){
+ Int_t jr(0), ir(idxRow[jr]);
+ // organize secondary sgms. in decreasing order of their distance from seed
+ memset(dyRez, 0, nts[jr]*sizeof(Double_t));
+ for(Int_t jts(1); jts<nts[jr]; jts++) {
+ Int_t its(idx2[jts]);
+ Double_t rot(TMath::Tan(r[0][is]));
+ dyRez[its] = TMath::Abs(ym[0][is] - ym[jr][its] + rot*(xm[0][is]-xm[jr][its]));
+ }
+ TMath::Sort(nts[jr], dyRez, idx3, kFALSE);
+ for (Int_t jts(1); jts<nts[jr]; jts++) {
+ Int_t its(idx3[jts]);
+ if(dyRez[its] > kNSgmDy[jr]*smTrklt){
+ AliDebug(2, Form("Reject seg[%d] row[%2d] n[%2d] dy[%f] > %d*s[%f].", its, idxRow[jr], n[jr][its], dyRez[its], kNSgmDy[jr], kNSgmDy[jr]*smTrklt));
+ continue;
+ }
+
+ test = helper;
+ Int_t n0 = test.Expand(&clst[ir], index[jr], its);
+ Double_t rt, dyt, st, xt, smt, pt, ft;
+ Int_t n1 = test.GetRMS(rt, dyt, st, xt);
+ pt = Double_t(n1)/n0;
+ smt = test.GetSyMean();
+ // correct position
+ Double_t dxm= fX0 - xt;
+ yt = fYref[0] - fYref[1]*dxm;
+ zt = fZref[0] - fZref[1]*dxm;
+ // correct tracklet fit for tilt
+ dyt+= GetTilt()*(zt - zc[idxRow[0]]);
+ rt += GetTilt() * fZref[1];
+ // correct tracklet fit for track position/inclination
+ dyt= yt - dyt;
+ rt = (rt - fYref[1])/(1+rt*fYref[1]);
+ // report inclination in radians
+ rt = TMath::ATan(rt);
+
+ ft = (n0>=2) ? attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n0, dyt/*sRef*/, rt*TMath::RadToDeg(), st/smt) : 0.;
+ Bool_t kAccept(ft>=fTrklt*(1.-kLikeMinRelDecrease[jr]));
+
+ AliDebug(2, Form("%s seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%f] < %4.2f*F[%f].",
+ (kAccept?"Adding":"Reject"), its, idxRow[jr], n0, dyt, rt*TMath::RadToDeg(), st/smt, ft, 1.-kLikeMinRelDecrease[jr], fTrklt*(1.-kLikeMinRelDecrease[jr])));
+ if(kAccept){
+ idxTrklt[kts++] = its;
+ nTrklt = n0;
+ fTrklt = ft;
+ rTrklt = rt;
+ yTrklt = dyt;
+ sTrklt = st;
+ smTrklt= smt;
+ xTrklt = xt;
+ pTrklt = pt;
+ helper.Expand(&clst[ir], index[jr], its);
+ }
+ }
+ }
- fN2++;
+ //=========================================================
+ // Try attaching next segments from second row (if any)
+ if(nts[1] && (rcLikelihood = zresRow[0]/zresRow[1]) > kRClikeLimit){
+ // organize secondaries in decreasing order of their distance from seed
+ Int_t jr(1), ir(idxRow[jr]);
+ memset(dyRez, 0, nts[jr]*sizeof(Double_t));
+ Double_t rot(TMath::Tan(r[0][is]));
+ for(Int_t jts(0); jts<nts[jr]; jts++) {
+ dyRez[jts] = TMath::Abs(ym[0][is] - ym[jr][jts] + rot*(xm[0][is]-xm[jr][jts]));
}
- }
-
- // 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;
+ TMath::Sort(nts[jr], dyRez, idx3, kFALSE);
+ for (Int_t jts(0); jts<nts[jr]; jts++) {
+ Int_t its(idx3[jts]);
+ if(dyRez[its] > kNSgmDy[jr]*smTrklt){
+ AliDebug(2, Form("Reject seg[%d] row[%2d] n[%2d] dy[%f] > %d*s[%f].", its, idxRow[jr], n[jr][its], dyRez[its], kNSgmDy[jr], kNSgmDy[jr]*smTrklt));
+ continue;
+ }
+
+ test = helper;
+ Int_t n0 = test.Expand(&clst[ir], index[jr], its);
+ Double_t rt, dyt, st, xt, smt, pt, ft;
+ Int_t n1 = test.GetRMS(rt, dyt, st, xt);
+ pt = Double_t(n1)/n0;
+ smt = test.GetSyMean();
+ // correct position
+ Double_t dxm= fX0 - xt;
+ yt = fYref[0] - fYref[1]*dxm;
+ zt = fZref[0] - fZref[1]*dxm;
+ // correct tracklet fit for tilt
+ dyt+= GetTilt()*(zt - zc[idxRow[0]]);
+ rt += GetTilt() * fZref[1];
+ // correct tracklet fit for track position/inclination
+ dyt= yt - dyt;
+ rt = (rt - fYref[1])/(1+rt*fYref[1]);
+ // report inclination in radians
+ rt = TMath::ATan(rt);
+
+ ft = (n0>=2) ? attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n0, dyt/*sRef*/, rt*TMath::RadToDeg(), st/smt) : 0.;
+ Bool_t kAccept(ft>=fTrklt*(1.-kLikeMinRelDecrease[jr]));
+
+ AliDebug(2, Form("%s seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%f] < %4.2f*F[%f].",
+ (kAccept?"Adding":"Reject"), its, idxRow[jr], n0, dyt, rt*TMath::RadToDeg(), st/smt, ft, 1.-kLikeMinRelDecrease[jr], fTrklt*(1.-kLikeMinRelDecrease[jr])));
+ if(kAccept){
+ idxTrklt[kts++] = its;
+ nTrklt = n0;
+ fTrklt = ft;
+ rTrklt = rt;
+ yTrklt = dyt;
+ sTrklt = st;
+ smTrklt= smt;
+ xTrklt = xt;
+ pTrklt = pt;
+ helper.Expand(&clst[ir], index[jr], its);
+ SetBit(kRowCross, kTRUE); // mark pad row crossing
+ }
+ }
+ }
+ // clear local copy of clusters
+ for(Int_t ir(0); ir<kNrows; ir++) clst[ir].Clear();
+
+ if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(pstreamer){
+ UChar_t stat(0);
+ if(IsKink()) SETBIT(stat, 1);
+ if(IsStandAlone()) SETBIT(stat, 2);
+ if(IsRowCross()) SETBIT(stat, 3);
+ TVectorD vidx; vidx.ResizeTo(kts);
+ for(Int_t its(0); its<kts; its++) vidx[its] = idxTrklt[its];
+ (*pstreamer) << "AttachClusters2"
+ << "stat=" << stat
+ << "ev=" << ev
+ << "chg=" << chgPos
+ << "det=" << fDet
+ << "x0=" << fX0
+ << "y0=" << fYref[0]
+ << "z0=" << fZref[0]
+ << "phi=" << phiTrk
+ << "tht=" << thtTrk
+ << "pt=" << fPt
+ << "s2Trk=" << s2yTrk
+ << "s2Cl=" << s2Mean
+ << "idx=" << &vidx
+ << "n=" << nTrklt
+ << "f=" << fTrklt
+ << "x=" << xTrklt
+ << "y=" << yTrklt
+ << "r=" << rTrklt
+ << "s=" << sTrklt
+ << "sm=" << smTrklt
+ << "p=" << pTrklt
+ << "\n";
+ }
+
+
+ //=========================================================
+ // Store clusters
+ Int_t nselected(0), nc(0);
+ TObjArray *selected(helper.GetClusters());
+ if(!selected || !(nselected = selected->GetEntriesFast())){
+ AliError("Cluster candidates missing !!!");
+ SetErrorMsg(kAttachClAttach);
return kFALSE;
}
-
- // update used clusters and select
- fNUsed = 0;
- for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
- if(fClusters[it] && fClusters[it]->IsUsed()) fNUsed++;
- if(fClusters[it+35] && fClusters[it+35]->IsUsed()) fNUsed++;
+ for(Int_t ic(0); ic<nselected; ic++){
+ if(!(c = (AliTRDcluster*)selected->At(ic))) continue;
+ Int_t it(c->GetPadTime()),
+ jr(Int_t(helper.GetRow() != c->GetPadRow())),
+ idx(it+kNtb*jr);
+ if(fClusters[idx]){
+ AliDebug(1, Form("Multiple clusters/tb for D[%03d] Tb[%02d] Row[%2d]", fDet, it, c->GetPadRow()));
+ continue; // already booked
+ }
+ // TODO proper indexing of clusters !!
+ fIndexes[idx] = chamber->GetTB(it)->GetGlobalIndex(idxs[idxRow[jr]][ic]);
+ fClusters[idx] = c;
+ nc++;
}
- if (fN2-fNUsed < kClmin){
- //AliWarning(Form("Too many clusters already in use %d (from %d).", fNUsed, fN2));
- fN2 = 0;
+ AliDebug(2, Form("Clusters Found[%2d] Attached[%2d] RC[%c]", nselected, nc, IsRowCross()?'y':'n'));
+
+ // number of minimum numbers of clusters expected for the tracklet
+ if (nc < kClmin){
+ AliDebug(1, Form("NOT ENOUGH CLUSTERS %d ATTACHED TO THE TRACKLET [min %d] FROM FOUND %d.", nc, kClmin, ncls));
+ SetErrorMsg(kAttachClAttach);
return kFALSE;
}
+ SetN(nc);
- // set the Lorentz angle for this tracklet
- SetExB();
+ // Load calibration parameters for this tracklet
+ //Calibrate();
// calculate dx for time bins in the drift region (calibration aware)
- Int_t irp = 0; Float_t x[2]; Int_t tb[2];
- 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;
- }
- fdX = (x[1] - x[0]) / (tb[0] - tb[1]);
-
- // 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;
- }
- }
- }
-
+ }
+ Int_t dtb = tb[1] - tb[0];
+ fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
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();
- fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);
- fTgl = fZref[1];
- fN = 0; fN2 = 0; fMPads = 0.;
+ SetPadPlane(g.GetPadPlane(fDet));
+
+ //fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);
+ //fTgl = fZref[1];
+ 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;
- fN++; fN2++;
- fX[ic] = (*cit)->GetX() - fX0;
- fY[ic] = (*cit)->GetY();
- fZ[ic] = (*cit)->GetZ();
+ n++;
+ if((*cit)->IsShared()) nshare++;
+ if((*cit)->IsUsed()) nused++;
}
- Update(); // Fit();
+ SetN(n); SetNUsed(nused); SetNShared(nshare);
+ Fit();
CookLabels();
GetProbability();
}
//____________________________________________________________________
-Bool_t AliTRDseedV1::Fit(Bool_t tilt, Int_t errors)
+Bool_t AliTRDseedV1::Fit(UChar_t opt)
{
- //
- // 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
- //
-
- const Int_t kClmin = 8;
-
+//
+// Linear fit of the clusters attached to the tracklet
+//
+// Parameters :
+// - opt : switch for tilt pad correction of cluster y position. Options are
+// 0 no correction [default]
+// 1 full tilt correction [dz/dx and z0]
+// 2 pseudo tilt correction [dz/dx from pad-chamber geometry]
+//
+// 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>
- // 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;
+ if(!fkReconstructor){
+ AliError("The tracklet needs the reconstruction setup. Please initialize by SetReconstructor().");
+ return kFALSE;
+ }
+ if(!IsCalibrated()) Calibrate();
+ if(opt>2){
+ AliWarning(Form("Option [%d] outside range [0, 2]. Using default",opt));
+ opt=0;
+ }
+ const Int_t kClmin = 8;
+ const Float_t kScalePulls = 10.; // factor to scale y pulls - NOT UNDERSTOOD
// get track direction
Double_t y0 = fYref[0];
Double_t dydx = fYref[1];
Double_t z0 = fZref[0];
Double_t dzdx = fZref[1];
- Double_t yt, zt;
- const Int_t kNtb = AliTRDtrackerV1::GetNTimeBins();
- //AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
- TLinearFitter fitterY(1, "pol1");
- // convertion factor from square to gauss distribution for sigma
- //Double_t convert = 1./TMath::Sqrt(12.);
-
+ AliTRDtrackerV1::AliTRDLeastSquare fitterY;
+ AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
+
// book cluster information
- Double_t q, xc[knTimebins], yc[knTimebins], zc[knTimebins], sy[knTimebins]/*, sz[knTimebins]*/;
-// Int_t zRow[knTimebins];
+ Double_t qc[kNclusters], xc[kNclusters], yc[kNclusters], zc[kNclusters], sy[kNclusters];
+
+ Bool_t tilt(opt==1) // full tilt correction
+ ,pseudo(opt==2) // pseudo tilt correction
+ ,rc(IsRowCross()) // row cross candidate
+ ,kDZDX(IsPrimary());// switch dzdx calculation for barrel primary tracks
+ Int_t n(0); // clusters used in fit
+ AliTRDcluster *c(NULL), *cc(NULL), **jc = &fClusters[0];
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it
+
+ const Char_t *tcName[]={"NONE", "FULL", "HALF"};
+ AliDebug(2, Form("Options : TC[%s] dzdx[%c]", tcName[opt], kDZDX?'Y':'N'));
+
- Int_t ily = AliTRDgeometry::GetLayer(fDet);
- fN = 0; //fXref = 0.; Double_t ssx = 0.;
- AliTRDcluster *c=0x0, **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.;
+ for (Int_t ic=0; ic<kNclusters; ic++, ++jc) {
+ xc[ic] = -1.; yc[ic] = 999.; zc[ic] = 999.; sy[ic] = 0.;
if(!(c = (*jc))) continue;
if(!c->IsInChamber()) continue;
+ // compute pseudo tilt correction
+ if(kDZDX){
+ fZfit[0] = c->GetZ();
+ if(rc){
+ for(Int_t kc=AliTRDseedV1::kNtb; kc<AliTRDseedV1::kNclusters; kc++){
+ if(!(cc=fClusters[kc])) continue;
+ if(!cc->IsInChamber()) continue;
+ fZfit[0] += cc->GetZ(); fZfit[0] *= 0.5;
+ break;
+ }
+ }
+ fZfit[1] = fZfit[0]/fX0;
+ if(rc){
+ fZfit[0] += fZfit[1]*0.5*AliTRDgeometry::CdrHght();
+ fZfit[1] = fZfit[0]/fX0;
+ }
+ kDZDX=kFALSE;
+ }
Float_t w = 1.;
if(c->GetNPads()>4) w = .5;
if(c->GetNPads()>5) w = .2;
- //zRow[fN] = c->GetPadRow();
- // correct cluster position for PRF and v drift
- 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
- q = TMath::Abs(c->GetQ());
- Double_t tgg = (dydx-fExB)/(1.+dydx*fExB); tgg *= tgg;
- // 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./q - 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
- // update xref
- //fXref += xc[fN]/sx; ssx+=1./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]/*-yt*/, sy[fN]);
- fN++;
+ // cluster charge
+ qc[n] = TMath::Abs(c->GetQ());
+ // pad row of leading
+
+ xc[n] = fX0 - c->GetX();
+
+ // Recalculate cluster error based on tracking information
+ c->SetSigmaY2(fS2PRF, fDiffT, fExB, xc[n], -1./*zcorr?zt:-1.*/, dydx);
+ c->SetSigmaZ2(fPad[0]*fPad[0]/12.); // for HLT
+ sy[n] = TMath::Sqrt(c->GetSigmaY2());
+
+ yc[n] = recoParam->UseGAUS() ?
+ c->GetYloc(y0, sy[n], GetPadWidth()): c->GetY();
+ zc[n] = c->GetZ();
+
+ //optional r-phi correction
+ //printf(" n[%2d] yc[%7.5f] ", n, yc[n]);
+ Float_t correction(0.);
+ if(tilt) correction = fPad[2]*(xc[n]*dzdx + zc[n] - z0);
+ else if(pseudo) correction = fPad[2]*(xc[n]*fZfit[1] + zc[n]-fZfit[0]);
+ yc[n]-=correction;
+ //printf("corr(%s%s)[%7.5f] yc1[%7.5f]\n", (tilt?"TC":""), (zcorr?"PC":""), correction, yc[n]);
+
+ AliDebug(5, Form(" tb[%2d] dx[%6.3f] y[%6.2f+-%6.3f]", c->GetLocalTimeBin(), xc[n], yc[n], sy[n]));
+ fitterY.AddPoint(&xc[n], yc[n], sy[n]);
+ if(rc) fitterZ.AddPoint(&xc[n], qc[n]*(ic<kNtb?1.:-1.), 1.);
+ n++;
}
- // to few clusters
- if (fN < kClmin) return kFALSE;
+ // to few clusters
+ if (n < kClmin){
+ AliDebug(1, Form("Not enough clusters to fit. Clusters: Attached[%d] Fit[%d].", GetN(), n));
+ SetErrorMsg(kFitCl);
+ return kFALSE;
+ }
// fit XY
- fitterY.Eval();
- fYfit[0] = fitterY.GetParameter(0);
- fYfit[1] = -fitterY.GetParameter(1);
+ if(!fitterY.Eval()){
+ AliDebug(1, "Fit Y failed.");
+ SetErrorMsg(kFitFailedY);
+ return kFALSE;
+ }
+ fYfit[0] = fitterY.GetFunctionParameter(0);
+ fYfit[1] = -fitterY.GetFunctionParameter(1);
// store covariance
- Double_t *p = fitterY.GetCovarianceMatrix();
- fCov[0] = p[0]; // variance of y0
- fCov[1] = p[1]; // covariance of y0, dydx
- fCov[2] = p[3]; // variance of dydx
+ Double_t p[3];
+ fitterY.GetCovarianceMatrix(p);
+ fCov[0] = kScalePulls*p[1]; // variance of y0
+ fCov[1] = kScalePulls*p[2]; // covariance of y0, dydx
+ fCov[2] = kScalePulls*p[0]; // variance of dydx
// the ref radial position is set at the minimum of
// the y variance of the tracklet
- fXref = -fCov[1]/fCov[2]; //fXref = fX0 - fXref;
+ fX = -fCov[1]/fCov[2];
+ fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*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.;
- } else {
- fZfit[0] = zc[0]; fZfit[1] = 0.;
- }
-
-
-// // 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];
-// }
+ Float_t xs=fX+.5*AliTRDgeometry::CamHght();
+ if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){
+ AliDebug(1, Form("Ref radial position ouside chamber x[%5.2f].", fX));
+ SetErrorMsg(kFitFailedY);
+ return kFALSE;
+ }
- UpdateUsed();
+/* // THE LEADING CLUSTER METHOD for z fit
+ 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)*/
+
+ // fit QZ
+ if(opt!=1 && IsRowCross()){
+ if(!fitterZ.Eval()) SetErrorMsg(kFitFailedZ);
+ if(!HasError(kFitFailedZ) && TMath::Abs(fitterZ.GetFunctionParameter(1))>1.e-10){
+ // TODO - one has to recalculate xy fit based on
+ // better knowledge of z position
+// Double_t x = -fitterZ.GetFunctionParameter(0)/fitterZ.GetFunctionParameter(1);
+// Double_t z0 = .5*(zc[0]+zc[n-1]);
+// fZfit[0] = z0 + fZfit[1]*x;
+// fZfit[1] = fZfit[0]/fX0;
+// redo fit on xy plane
+ }
+ // 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] + dzdx*0.5*AliTRDgeometry::CdrHght();
+ fS2Z = GetPadLength()*GetPadLength()/12.;
+ }
return kTRUE;
}
+//____________________________________________________________________
+Bool_t AliTRDseedV1::FitRobust(Bool_t chg)
+{
+//
+// Linear fit of the clusters attached to the tracklet
+//
+// Author
+// A.Bercuci <A.Bercuci@gsi.de>
+
+ TTreeSRedirector *pstreamer(NULL);
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+
+ // factor to scale y pulls.
+ // ideally if error parametrization correct this is 1.
+ //Float_t lyScaler = 1./(AliTRDgeometry::GetLayer(fDet)+1.);
+ Float_t kScalePulls = 1.;
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if(!calibration){
+ AliWarning("No access to calibration data");
+ } else {
+ // Retrieve the CDB container class with the parametric likelihood
+ const AliTRDCalTrkAttach *attach = calibration->GetAttachObject();
+ if(!attach){
+ AliWarning("No usable AttachClusters calib object.");
+ } else {
+ kScalePulls = attach->GetScaleCov();//*lyScaler;
+ }
+ }
+ Double_t xc[kNclusters], yc[kNclusters], sy[kNclusters];
+ Int_t n(0), // clusters used in fit
+ row[]={-1, 0}; // pad row spanned by the tracklet
+ AliTRDcluster *c(NULL), **jc = &fClusters[0];
+ for(Int_t ic=0; ic<kNtb; ic++, ++jc) {
+ if(!(c = (*jc))) continue;
+ if(!c->IsInChamber()) continue;
+ if(row[0]<0){
+ fZfit[0] = c->GetZ();
+ fZfit[1] = 0.;
+ row[0] = c->GetPadRow();
+ }
+ xc[n] = fX0 - c->GetX();
+ yc[n] = c->GetY();
+ sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08;
+ n++;
+ }
+ Double_t corr = fPad[2]*fPad[0];
+
+ for(Int_t ic=kNtb; ic<kNclusters; ic++, ++jc) {
+ if(!(c = (*jc))) continue;
+ if(!c->IsInChamber()) continue;
+ if(row[1]==0) row[1] = c->GetPadRow() - row[0];
+ xc[n] = fX0 - c->GetX();
+ yc[n] = c->GetY() + corr*row[1];
+ sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08;
+ n++;
+ }
+ UChar_t status(0);
+ Double_t par[3] = {0.,0.,21122012.}, cov[3];
+ if(!AliTRDtrackletOflHelper::Fit(n, xc, yc, sy, par, 1.5, cov)){
+ AliDebug(1, Form("Tracklet fit failed D[%03d].", fDet));
+ SetErrorMsg(kFitCl);
+ return kFALSE;
+ }
+ fYfit[0] = par[0];
+ fYfit[1] = -par[1];
+ // store covariance
+ fCov[0] = kScalePulls*cov[0]; // variance of y0
+ fCov[1] = kScalePulls*cov[2]; // covariance of y0, dydx
+ fCov[2] = kScalePulls*cov[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];
+ // check radial position
+ Float_t xs=fX+.5*AliTRDgeometry::CamHght();
+ if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){
+ AliDebug(1, Form("Ref radial position x[%5.2f] ouside D[%3d].", fX, fDet));
+ SetErrorMsg(kFitFailedY);
+ return kFALSE;
+ }
+ fS2Y = fCov[0] + fX*fCov[1];
+ fS2Z = fPad[0]*fPad[0]/12.;
+ AliDebug(2, Form("[I] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[cm]=%6.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z)));
+ if(IsRowCross()){
+ Float_t x,z;
+ if(!GetEstimatedCrossPoint(x,z)){
+ AliDebug(2, Form("Failed getting crossing point D[%03d].", fDet));
+ SetErrorMsg(kFitFailedY);
+ return kTRUE;
+ }
+ fX = fX0-x;
+ fS2Y = fCov[0] + fX*fCov[1];
+ fZfit[0] = z;
+ if(IsPrimary()){
+ fZfit[1] = z/x;
+ fS2Z = 0.05+0.4*TMath::Abs(fZfit[1]); fS2Z *= fS2Z;
+ }
+ AliDebug(2, Form("[II] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[um]=%6.2f dzdx[deg]=%+5.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z)*1.e4, TMath::ATan(fZfit[1])*TMath::RadToDeg()));
+ }
+
+ if(pstreamer){
+ Float_t x= fX0 -fX,
+ y = GetY(),
+ yt = fYref[0]-fX*fYref[1];
+ SETBIT(status, 2);
+ TVectorD vcov(3); vcov[0]=cov[0];vcov[1]=cov[1];vcov[2]=cov[2];
+ Double_t sm(0.), chi2(0.), tmp, dy[kNclusters];
+ for(Int_t ic(0); ic<n; ic++){
+ sm += sy[ic];
+ dy[ic] = yc[ic]-(fYfit[0]-xc[ic]*fYfit[1]); tmp = dy[ic]/sy[ic];
+ chi2 += tmp*tmp;
+ }
+ sm /= n; chi2 = TMath::Sqrt(chi2);
+ Double_t m(0.), s(0.);
+ AliMathBase::EvaluateUni(n, dy, m, s, 0);
+ (*pstreamer) << "FitRobust4"
+ << "stat=" << status
+ << "chg=" << chg
+ << "ncl=" << n
+ << "det=" << fDet
+ << "x0=" << fX0
+ << "y0=" << fYfit[0]
+ << "x=" << x
+ << "y=" << y
+ << "dydx=" << fYfit[1]
+ << "pt=" << fPt
+ << "yt=" << yt
+ << "dydxt="<< fYref[1]
+ << "cov=" << &vcov
+ << "chi2=" << chi2
+ << "sm=" << sm
+ << "ss=" << s
+ << "\n";
+ }
+ return kTRUE;
+}
+
//___________________________________________________________________
void AliTRDseedV1::Print(Option_t *o) const
{
// Printing the seedstatus
//
- AliInfo(Form("Det[%3d] Tilt[%+6.2f] Pad[%5.2f]", fDet, fTilt, fPadLength));
- AliInfo(Form("Nattach[%2d] Nfit[%2d] Nuse[%2d] pads[%f]", fN, fN2, fNUsed, fMPads));
- 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'));
+ AliInfo(Form("CALIB PARAMS : T0[%5.2f] Vd[%5.2f] s2PRF[%5.2f] ExB[%5.2f] Dl[%5.2f] Dt[%5.2f]", fT0, fVD, fS2PRF, fExB, fDiffL, fDiffT));
+
+ 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));
+ if(IsStandAlone()) AliInfo(Form("C Rieman / Vertex [1/cm] = %f / %f", fC[0], fC[1]));
+ 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<AliTRDtrackerV1::GetNTimeBins(); ic++, jc++) {
+ for(int ic=0; ic<kNclusters; ic++, jc++) {
if(!(*jc)) continue;
(*jc)->Print(o);
}
if(!inTracklet) return kFALSE;
for (Int_t i = 0; i < 2; i++){
- if ( fYref[i] != inTracklet->GetYref(i) ) return kFALSE;
- if ( fZref[i] != inTracklet->GetZref(i) ) return kFALSE;
+ if ( fYref[i] != inTracklet->fYref[i] ) return kFALSE;
+ if ( fZref[i] != inTracklet->fZref[i] ) return kFALSE;
}
- if ( fSigmaY != inTracklet->GetSigmaY() ) return kFALSE;
- if ( fSigmaY2 != inTracklet->GetSigmaY2() ) return kFALSE;
- if ( fTilt != inTracklet->GetTilt() ) return kFALSE;
- if ( fPadLength != inTracklet->GetPadLength() ) return kFALSE;
+ if ( TMath::Abs(fS2Y - inTracklet->fS2Y)>1.e-10 ) return kFALSE;
+ if ( TMath::Abs(GetTilt() - inTracklet->GetTilt())>1.e-10 ) return kFALSE;
+ if ( TMath::Abs(GetPadLength() - inTracklet->GetPadLength())>1.e-10 ) return kFALSE;
- for (Int_t i = 0; i < knTimebins; 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 ( fIndexes[i] != inTracklet->GetIndexes(i) ) return kFALSE;
- if ( fUsable[i] != inTracklet->IsUsable(i) ) return kFALSE;
+ 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 ( fIndexes[i] != inTracklet->fIndexes[i] ) return kFALSE;
}
+// if ( fUsable != inTracklet->fUsable ) return kFALSE;
for (Int_t i=0; i < 2; i++){
- if ( fYfit[i] != inTracklet->GetYfit(i) ) return kFALSE;
- if ( fZfit[i] != inTracklet->GetZfit(i) ) return kFALSE;
- if ( fYfitR[i] != inTracklet->GetYfitR(i) ) return kFALSE;
- if ( fZfitR[i] != inTracklet->GetZfitR(i) ) return kFALSE;
- if ( fLabels[i] != inTracklet->GetLabels(i) ) return kFALSE;
+ if ( fYfit[i] != inTracklet->fYfit[i] ) return kFALSE;
+ if ( fZfit[i] != inTracklet->fZfit[i] ) return kFALSE;
+ if ( fLabels[i] != inTracklet->fLabels[i] ) return kFALSE;
}
- if ( fMeanz != inTracklet->GetMeanz() ) return kFALSE;
- if ( fZProb != inTracklet->GetZProb() ) return kFALSE;
- if ( fN2 != inTracklet->GetN2() ) return kFALSE;
- if ( fNUsed != inTracklet->GetNUsed() ) return kFALSE;
- if ( fFreq != inTracklet->GetFreq() ) return kFALSE;
- if ( fNChange != inTracklet->GetNChange() ) return kFALSE;
- if ( fNChange != inTracklet->GetNChange() ) return kFALSE;
+/* if ( fMeanz != inTracklet->GetMeanz() ) return kFALSE;
+ if ( fZProb != inTracklet->GetZProb() ) 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 ( fC != inTracklet->GetC() ) return kFALSE;
- if ( fCC != inTracklet->GetCC() ) return kFALSE;
- if ( fChi2 != inTracklet->GetChi2() ) return kFALSE;
+ if ( TMath::Abs(fC[0] - inTracklet->fC[0])>1.e-10 ) return kFALSE;
+ //if ( fCC != inTracklet->GetCC() ) return kFALSE;
+ if ( TMath::Abs(fChi2 - inTracklet->fChi2)>1.e-10 ) return kFALSE;
// if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE;
- if ( fDet != inTracklet->GetDetector() ) return kFALSE;
- if ( fMom != inTracklet->GetMomentum() ) return kFALSE;
- if ( fdX != inTracklet->GetdX() ) return kFALSE;
+ if ( fDet != inTracklet->fDet ) return kFALSE;
+ if ( TMath::Abs(fPt - inTracklet->fPt)>1.e-10 ) return kFALSE;
+ if ( TMath::Abs(fdX - inTracklet->fdX)>1.e-10 ) 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->GetClusters(iCluster);
+ AliTRDcluster *inCluster = inTracklet->fClusters[iCluster];
if (curCluster && inCluster){
if (! curCluster->IsEqual(inCluster) ) {
curCluster->Print();
}
return kTRUE;
}
+