/**************************************************************************
- * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
- * *
- * Author: The ALICE Off-line Project. *
- * Contributors are mentioned in the code where appropriate. *
- * *
- * Permission to use, copy, modify and distribute this software and its *
- * documentation strictly for non-commercial purposes is hereby granted *
- * without fee, provided that the above copyright notice appears in all *
- * copies and that both the copyright notice and this permission notice *
- * appear in the supporting documentation. The authors make no claims *
- * about the suitability of this software for any purpose. It is *
- * provided "as is" without express or implied warranty. *
- **************************************************************************/
+* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+* *
+* Author: The ALICE Off-line Project. *
+* Contributors are mentioned in the code where appropriate. *
+* *
+* Permission to use, copy, modify and distribute this software and its *
+* documentation strictly for non-commercial purposes is hereby granted *
+* without fee, provided that the above copyright notice appears in all *
+* copies and that both the copyright notice and this permission notice *
+* appear in the supporting documentation. The authors make no claims *
+* about the suitability of this software for any purpose. It is *
+* provided "as is" without express or implied warranty. *
+**************************************************************************/
/* $Id$ */
#include "AliLog.h"
#include "AliMathBase.h"
+#include "AliCDBManager.h"
+#include "AliTracker.h"
+#include "AliTRDpadPlane.h"
#include "AliTRDcluster.h"
#include "AliTRDseedV1.h"
#include "AliTRDtrackV1.h"
#include "AliTRDtrackerV1.h"
#include "AliTRDReconstructor.h"
#include "AliTRDrecoParam.h"
-#include "AliTRDgeometry.h"
+#include "AliTRDCommonParam.h"
+
#include "Cal/AliTRDCalPID.h"
+#include "Cal/AliTRDCalROC.h"
+#include "Cal/AliTRDCalDet.h"
ClassImp(AliTRDseedV1)
//____________________________________________________________________
-AliTRDseedV1::AliTRDseedV1(Int_t plane)
- :AliTRDseed()
- ,fPlane(plane)
+AliTRDseedV1::AliTRDseedV1(Int_t det)
+ :AliTRDtrackletBase()
+ ,fReconstructor(0x0)
+ ,fClusterIter(0x0)
+ ,fExB(0.)
+ ,fVD(0.)
+ ,fT0(0.)
+ ,fS2PRF(0.)
+ ,fDiffL(0.)
+ ,fDiffT(0.)
+ ,fClusterIdx(0)
+ ,fN(0)
+ ,fDet(det)
+ ,fTilt(0.)
+ ,fPadLength(0.)
,fMom(0.)
- ,fSnp(0.)
- ,fTgl(0.)
,fdX(0.)
+ ,fX0(0.)
+ ,fX(0.)
+ ,fY(0.)
+ ,fZ(0.)
+ ,fS2Y(0.)
+ ,fS2Z(0.)
+ ,fC(0.)
+ ,fChi2(0.)
{
//
// Constructor
//
- for(int islice=0; islice < knSlices; islice++) fdEdx[islice] = 0.;
- for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
+ for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1;
+ memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
+ 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
+ fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.;
+ // 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)
- ,fPlane(ref.fPlane)
- ,fMom(ref.fMom)
- ,fSnp(ref.fSnp)
- ,fTgl(ref.fTgl)
- ,fdX(ref.fdX)
+ :AliTRDtrackletBase((AliTRDtrackletBase&)ref)
+ ,fReconstructor(0x0)
+ ,fClusterIter(0x0)
+ ,fExB(0.)
+ ,fVD(0.)
+ ,fT0(0.)
+ ,fS2PRF(0.)
+ ,fDiffL(0.)
+ ,fDiffT(0.)
+ ,fClusterIdx(0)
+ ,fN(0)
+ ,fDet(-1)
+ ,fTilt(0.)
+ ,fPadLength(0.)
+ ,fMom(0.)
+ ,fdX(0.)
+ ,fX0(0.)
+ ,fX(0.)
+ ,fY(0.)
+ ,fZ(0.)
+ ,fS2Y(0.)
+ ,fS2Z(0.)
+ ,fC(0.)
+ ,fChi2(0.)
{
//
// Copy Constructor performing a deep copy
//
-
- //AliInfo("");
- 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];
+ if(this != &ref){
+ ref.Copy(*this);
+ }
+ SetBit(kOwner, kFALSE);
+ SetStandAlone(ref.IsStandAlone());
}
// Assignment Operator using the copy function
//
- //AliInfo("");
- if(this != &ref){
- ref.Copy(*this);
- }
- return *this;
+ if(this != &ref){
+ ref.Copy(*this);
+ }
+ SetBit(kOwner, kFALSE);
+ return *this;
}
//____________________________________________________________________
// Destructor. The RecoParam object belongs to the underlying tracker.
//
- //AliInfo(Form("fOwner[%s]", fOwner?"YES":"NO"));
+ //printf("I-AliTRDseedV1::~AliTRDseedV1() : Owner[%s]\n", IsOwner()?"YES":"NO");
- if(IsOwner())
- for(int itb=0; itb<knTimebins; itb++){
- if(!fClusters[itb]) continue;
- //AliInfo(Form("deleting c %p @ %d", fClusters[itb], itb));
- delete fClusters[itb];
- fClusters[itb] = 0x0;
- }
+ 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;
+ }
+ }
}
//____________________________________________________________________
// Copy function
//
- //AliInfo("");
- AliTRDseedV1 &target = (AliTRDseedV1 &)ref;
-
- target.fPlane = fPlane;
- target.fMom = fMom;
- target.fSnp = fSnp;
- target.fTgl = fTgl;
- target.fdX = fdX;
-
- 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];
-
- AliTRDseed::Copy(target);
+ //AliInfo("");
+ AliTRDseedV1 &target = (AliTRDseedV1 &)ref;
+
+ target.fReconstructor = fReconstructor;
+ target.fClusterIter = 0x0;
+ target.fExB = fExB;
+ target.fVD = fVD;
+ target.fT0 = fT0;
+ target.fS2PRF = fS2PRF;
+ target.fDiffL = fDiffL;
+ target.fDiffT = fDiffT;
+ target.fClusterIdx = 0;
+ target.fN = fN;
+ target.fDet = fDet;
+ target.fTilt = fTilt;
+ target.fPadLength = fPadLength;
+ target.fMom = fMom;
+ target.fdX = fdX;
+ target.fX0 = fX0;
+ target.fX = fX;
+ target.fY = fY;
+ target.fZ = fZ;
+ target.fS2Y = fS2Y;
+ target.fS2Z = fS2Z;
+ target.fC = fC;
+ target.fChi2 = fChi2;
+
+ memcpy(target.fIndexes, fIndexes, kNclusters*sizeof(Int_t));
+ memcpy(target.fClusters, fClusters, kNclusters*sizeof(AliTRDcluster*));
+ 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, 3*sizeof(Double_t));
+ memcpy(target.fCov, fCov, 3*sizeof(Double_t));
+
+ TObject::Copy(ref);
}
// chamber where the tracklet will be constructed
//
- Double_t y, z;
- if(!track->GetProlongation(fX0, y, z)) return kFALSE;
- fYref[0] = y;
- fYref[1] = track->GetSnp()/(1. - track->GetSnp()*track->GetSnp());
- fZref[0] = z;
- fZref[1] = track->GetTgl();
+ Double_t y, z;
+ if(!track->GetProlongation(fX0, y, z)) return kFALSE;
+ UpDate(track);
+ return kTRUE;
+}
+
+
+//_____________________________________________________________________________
+void AliTRDseedV1::Reset()
+{
+ //
+ // Reset seed
+ //
+ fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.;
+ fDiffL=0.;fDiffT=0.;
+ fClusterIdx=0;
+ fN=0;
+ fDet=-1;fTilt=0.;fPadLength=0.;
+ fMom=0.;
+ fdX=0.;fX0=0.; fX=0.; fY=0.; fZ=0.;
+ fS2Y=0.; fS2Z=0.;
+ fC=0.; fChi2 = 0.;
+
+ for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1;
+ memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
+ 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
+ fRefCov[0] = 1.; fRefCov[1] = 0.; fRefCov[2] = 1.;
+ // 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)
+{
+ // update tracklet reference position from the TRD track
+ // Funny name to avoid the clash with the function AliTRDseed::Update() (has to be made obselete)
+
+ Double_t fSnp = trk->GetSnp();
+ Double_t fTgl = trk->GetTgl();
+ fMom = trk->GetP();
+ fYref[1] = fSnp/(1. - fSnp*fSnp);
+ fZref[1] = fTgl;
+ SetCovRef(trk->GetCovariance());
+
+ Double_t dx = trk->GetX() - fX0;
+ fYref[0] = trk->GetY() - dx*fYref[1];
+ 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);
+}
- //printf("Tracklet ref x[%7.3f] y[%7.3f] z[%7.3f], snp[%f] tgl[%f]\n", fX0, fYref[0], fZref[0], track->GetSnp(), track->GetTgl());
- return kTRUE;
+//_____________________________________________________________________________
+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) = 0x0;
+ 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());
-
- AliTRDcluster *cluster = 0x0;
- for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){
- if(!(cluster = fClusters[ic])) continue;
- Float_t x = cluster->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;
-
- // 2. take sharing into account
- Float_t w = cluster->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(AliTRDReconstructor::RecoParam()->GetPIDMethod() == 0){
- // calculate mean charge per slice (only LQ PID)
- for(int is=0; is<nslices; is++){
- if(nclusters[is]) fdEdx[is] /= nclusters[is];
- }
- }
+ Int_t nclusters[kNslices];
+ memset(nclusters, 0, kNslices*sizeof(Int_t));
+ memset(fdEdx, 0, kNslices*sizeof(Float_t));
+
+ const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
+
+ AliTRDcluster *c = 0x0;
+ for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){
+ if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue;
+ Float_t dx = TMath::Abs(fX0 - c->GetX());
+
+ // Filter clusters for dE/dx calculation
+
+ // 1.consider calibration effects for slice determination
+ 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 = /*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 == AliTRDpidUtil::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];
}
+//____________________________________________________________________
+void AliTRDseedV1::GetClusterXY(const AliTRDcluster *c, Double_t &x, Double_t &y)
+{
+// Return corrected position of the cluster taking into
+// account variation of the drift velocity with drift length.
+
+
+ // drift velocity correction TODO to be moved to the clusterizer
+ const Float_t cx[] = {
+ -9.6280e-02, 1.3091e-01,-1.7415e-02,-9.9221e-02,-1.2040e-01,-9.5493e-02,
+ -5.0041e-02,-1.6726e-02, 3.5756e-03, 1.8611e-02, 2.6378e-02, 3.3823e-02,
+ 3.4811e-02, 3.5282e-02, 3.5386e-02, 3.6047e-02, 3.5201e-02, 3.4384e-02,
+ 3.2864e-02, 3.1932e-02, 3.2051e-02, 2.2539e-02,-2.5154e-02,-1.2050e-01,
+ -1.2050e-01
+ };
+
+ // PRF correction TODO to be replaced by the gaussian
+ // approximation with full error parametrization and // moved to the clusterizer
+ const Float_t cy[AliTRDgeometry::kNlayer][3] = {
+ { 4.014e-04, 8.605e-03, -6.880e+00},
+ {-3.061e-04, 9.663e-03, -6.789e+00},
+ { 1.124e-03, 1.105e-02, -6.825e+00},
+ {-1.527e-03, 1.231e-02, -6.777e+00},
+ { 2.150e-03, 1.387e-02, -6.783e+00},
+ {-1.296e-03, 1.486e-02, -6.825e+00}
+ };
+
+ Int_t ily = AliTRDgeometry::GetLayer(c->GetDetector());
+ x = c->GetX() - cx[c->GetLocalTimeBin()];
+ y = c->GetY() + cy[ily][0] + cy[ily][1] * TMath::Sin(cy[ily][2] * c->GetCenter());
+ return;
+}
+
//____________________________________________________________________
Float_t AliTRDseedV1::GetdQdl(Int_t ic) const
{
- return fClusters[ic] ? TMath::Abs(fClusters[ic]->GetQ()) /fdX / TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]) : 0.;
+// Using the linear approximation of the track inside one TRD chamber (TRD tracklet)
+// the charge per unit length can be written as:
+// BEGIN_LATEX
+// #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dy}{dx}}^{2}_{ref}}}
+// END_LATEX
+// where qc is the total charge collected in the current time bin and dx is the length
+// of the time bin. For the moment (Jan 20 2009) only pad row cross corrections are
+// considered for the charge but none are applied for drift velocity variations along
+// the drift region or assymetry of the TRF
+//
+// Author : Alex Bercuci <A.Bercuci@gsi.de>
+//
+ Float_t dq = 0.;
+ if(fClusters[ic]) dq += TMath::Abs(fClusters[ic]->GetQ());
+ if(fClusters[ic+kNtb]) dq += TMath::Abs(fClusters[ic+kNtb]->GetQ());
+ if(dq<1.e-3 || fdX < 1.e-3) return 0.;
+
+ return dq/fdX/TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]);
}
//____________________________________________________________________
-Double_t* AliTRDseedV1::GetProbability()
+Float_t* AliTRDseedV1::GetProbability(Bool_t force)
{
+ if(!force) return &fProb[0];
+ if(!CookPID()) return 0x0;
+ return &fProb[0];
+}
+
+//____________________________________________________________
+Bool_t AliTRDseedV1::CookPID()
+{
// Fill probability array for tracklet from the DB.
//
// Parameters
//
// Detailed description
-
- // retrive calibration db
+
+ // retrive calibration db
AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
if (!calibration) {
AliError("No access to calibration data");
- return 0x0;
+ return kFALSE;
+ }
+
+ if (!fReconstructor) {
+ AliError("Reconstructor not set.");
+ return kFALSE;
}
// Retrieve the CDB container class with the parametric detector response
- const AliTRDCalPID *pd = calibration->GetPIDObject(AliTRDReconstructor::RecoParam()->GetPIDMethod());
+ const AliTRDCalPID *pd = calibration->GetPIDObject(fReconstructor->GetPIDMethod());
if (!pd) {
AliError("No access to AliTRDCalPID object");
- return 0x0;
+ return kFALSE;
}
- //AliInfo(Form("Method[%d] : %s", AliTRDReconstructor::RecoParam()->GetPIDMethod(), pd->IsA()->GetName()));
+ //AliInfo(Form("Method[%d] : %s", fReconstructor->GetRecoParam() ->GetPIDMethod(), pd->IsA()->GetName()));
- // calculate tracklet length TO DO
+ // calculate tracklet length TO DO
Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
/// TMath::Sqrt((1.0 - fSnp[iPlane]*fSnp[iPlane]) / (1.0 + fTgl[iPlane]*fTgl[iPlane]));
//calculate dE/dx
- CookdEdx(AliTRDReconstructor::RecoParam()->GetNdEdxSlices());
+ 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, fPlane);
+ fProb[ispec] = pd->GetProbability(ispec, fMom, &fdEdx[0], length, GetPlane());
}
- return &fProb[0];
+ return kTRUE;
}
//____________________________________________________________________
// Returns a quality measurement of the current seed
//
- Float_t zcorr = kZcorr ? fTilt * (fZProb - fZref[0]) : 0.;
- return
- .5 * TMath::Abs(18.0 - fN2)
- + 10.* TMath::Abs(fYfit[1] - fYref[1])
- + 5. * TMath::Abs(fYfit[0] - fYref[0] + zcorr)
- + 2. * TMath::Abs(fMeanz - fZref[0]) / fPadLength;
+ Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.;
+ return
+ .5 * TMath::Abs(18.0 - GetN())
+ + 10.* TMath::Abs(fYfit[1] - fYref[1])
+ + 5. * TMath::Abs(fYfit[0] - fYref[0] + zcorr)
+ + 2. * TMath::Abs(fZfit[0] - fZref[0]) / fPadLength;
}
//____________________________________________________________________
-void AliTRDseedV1::GetCovAt(Double_t /*x*/, Double_t *cov) const
+void AliTRDseedV1::GetCovAt(Double_t x, Double_t *cov) const
{
-// Computes covariance in the y-z plane at radial point x
-
- Int_t ic = 0; while (!fClusters[ic]) ic++;
- AliTRDcalibDB *fCalib = AliTRDcalibDB::Instance();
- Double_t exB = fCalib->GetOmegaTau(fCalib->GetVdriftAverage(fClusters[ic]->GetDetector()), -AliTracker::GetBz()*0.1);
+// Computes covariance in the y-z plane at radial point x (in tracking coordinates)
+// and returns the results in the preallocated array cov[3] as :
+// cov[0] = Var(y)
+// cov[1] = Cov(yz)
+// cov[2] = Var(z)
+//
+// Details
+//
+// For the linear transformation
+// BEGIN_LATEX
+// Y = T_{x} X^{T}
+// END_LATEX
+// The error propagation has the general form
+// BEGIN_LATEX
+// C_{Y} = T_{x} C_{X} T_{x}^{T}
+// END_LATEX
+// We apply this formula 2 times. First to calculate the covariance of the tracklet
+// at point x we consider:
+// BEGIN_LATEX
+// T_{x} = (1 x); X=(y0 dy/dx); C_{X}=#(){#splitline{Var(y0) Cov(y0, dy/dx)}{Cov(y0, dy/dx) Var(dy/dx)}}
+// END_LATEX
+// and secondly to take into account the tilt angle
+// BEGIN_LATEX
+// T_{#alpha} = #(){#splitline{cos(#alpha) __ sin(#alpha)}{-sin(#alpha) __ cos(#alpha)}}; X=(y z); C_{X}=#(){#splitline{Var(y) 0}{0 Var(z)}}
+// END_LATEX
+//
+// using simple trigonometrics one can write for this last case
+// BEGIN_LATEX
+// C_{Y}=#frac{1}{1+tg^{2}#alpha} #(){#splitline{(#sigma_{y}^{2}+tg^{2}#alpha#sigma_{z}^{2}) __ tg#alpha(#sigma_{z}^{2}-#sigma_{y}^{2})}{tg#alpha(#sigma_{z}^{2}-#sigma_{y}^{2}) __ (#sigma_{z}^{2}+tg^{2}#alpha#sigma_{y}^{2})}}
+// END_LATEX
+// which can be aproximated for small alphas (2 deg) with
+// BEGIN_LATEX
+// C_{Y}=#(){#splitline{#sigma_{y}^{2} __ (#sigma_{z}^{2}-#sigma_{y}^{2})tg#alpha}{((#sigma_{z}^{2}-#sigma_{y}^{2})tg#alpha __ #sigma_{z}^{2}}}
+// END_LATEX
+//
+// before applying the tilt rotation we also apply systematic uncertainties to the tracklet
+// position which can be tunned from outside via the AliTRDrecoParam::SetSysCovMatrix(). They might
+// account for extra misalignment/miscalibration uncertainties.
+//
+// Author :
+// Alex Bercuci <A.Bercuci@gsi.de>
+// Date : Jan 8th 2009
+//
- Double_t sy2 = fSigmaY2*fSigmaY2 + .2*(fYfit[1]-exB)*(fYfit[1]-exB);
- Double_t sz2 = fPadLength/12.;
+ Double_t xr = fX0-x;
+ Double_t sy2 = fCov[0] +2.*xr*fCov[1] + xr*xr*fCov[2];
+ Double_t sz2 = fPadLength*fPadLength/12.;
- //printf("Yfit[1] %f sy20 %f SigmaY2 %f\n", fYfit[1], sy20, fSigmaY2);
+ // insert systematic uncertainties
+ Double_t sys[15];
+ fReconstructor->GetRecoParam()->GetSysCovMatrix(sys);
+ sy2 += sys[0];
+ sz2 += sys[1];
- cov[0] = sy2;
- cov[1] = fTilt*(sy2-sz2);
- cov[2] = sz2;
+ // 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;
}
//____________________________________________________________________
-void AliTRDseedV1::SetOwner(Bool_t own)
+void AliTRDseedV1::Calibrate()
{
- //AliInfo(Form("own [%s] fOwner[%s]", own?"YES":"NO", fOwner?"YES":"NO"));
-
- if(own){
- for(int ic=0; ic<knTimebins; ic++){
- if(!fClusters[ic]) continue;
- fClusters[ic] = new AliTRDcluster(*fClusters[ic]);
- }
- SetBit(1);
- } else {
- if(IsOwner()){
- for(int ic=0; ic<knTimebins; ic++){
- if(!fClusters[ic]) continue;
- delete fClusters[ic];
- //fClusters[ic] = tracker->GetClusters(index) TODO
- }
- }
- SetBit(1, kFALSE);
- }
+// 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.
+//
+// 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>
+// Date : Jan 8th 2009
+//
+
+ AliCDBManager *cdb = AliCDBManager::Instance();
+ if(cdb->GetRun() < 0){
+ AliError("OCDB manager not properly initialized");
+ return;
+ }
+
+ 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(GetN()){
+ Int_t ic = 0;
+ while (ic<kNclusters && !(*c)){ic++; c++;}
+ if(*c){
+ col = (*c)->GetPadCol();
+ row = (*c)->GetPadRow();
+ }
+ }
+
+ fT0 = t0Det->GetValue(fDet) + t0ROC->GetValue(col,row);
+ 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);
+ SetBit(kCalib, kTRUE);
}
//____________________________________________________________________
-Bool_t AliTRDseedV1::AttachClustersIter(AliTRDtrackingChamber *chamber, Float_t quality, Bool_t kZcorr, AliTRDcluster *c)
+void AliTRDseedV1::SetOwner()
{
- //
- // 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(!AliTRDReconstructor::RecoParam()){
- AliError("Seed can not be used without a valid RecoParam.");
- return kFALSE;
- }
-
- AliTRDchamberTimeBin *layer = 0x0;
- if(AliTRDReconstructor::StreamLevel()>=7 && c){
- TClonesArray clusters("AliTRDcluster", 24);
- clusters.SetOwner(kTRUE);
- AliTRDcluster *cc = 0x0;
- Int_t det=-1, ncl, ncls = 0;
- for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
- if(!(layer = chamber->GetTB(iTime))) continue;
- if(!(ncl = Int_t(*layer))) continue;
- for(int ic=0; ic<ncl; ic++){
- cc = (*layer)[ic];
- det = cc->GetDetector();
- new(clusters[ncls++]) AliTRDcluster(*cc);
- }
- }
- AliInfo(Form("N clusters[%d] = %d", fPlane, ncls));
-
- Int_t ref = c ? 1 : 0;
- TTreeSRedirector &cstreamer = *AliTRDtrackerV1::DebugStreamer();
- cstreamer << "AttachClustersIter"
- << "det=" << det
- << "ref=" << ref
- << "clusters.=" << &clusters
- << "tracklet.=" << this
- << "cl.=" << c
- << "\n";
- }
-
- Float_t tquality;
- Double_t kroady = AliTRDReconstructor::RecoParam()->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(AliTRDReconstructor::StreamLevel()>=7) AliInfo(Form("iter = %d ncl [%d] = %d", iter, fPlane, 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] = fClusters[iTime]->GetX() - fX0;
- }
-
- AliTRDseed::Update();
- }
- if(AliTRDReconstructor::StreamLevel()>=7) AliInfo(Form("iter = %d nclFit [%d] = %d", iter, fPlane, fN2));
-
- if(IsOK()){
- tquality = GetQuality(kZcorr);
- if(tquality < quality) break;
- else quality = tquality;
- }
- kroadz *= 2.;
- } // Loop: iter
- if (!IsOK()) return kFALSE;
-
- CookLabels();
- UpdateUsed();
- return kTRUE;
+ //AliInfo(Form("own [%s] fOwner[%s]", own?"YES":"NO", fOwner?"YES":"NO"));
+
+ if(TestBit(kOwner)) return;
+ for(int ic=0; ic<kNclusters; ic++){
+ if(!fClusters[ic]) continue;
+ fClusters[ic] = new AliTRDcluster(*fClusters[ic]);
+ }
+ SetBit(kOwner);
}
+// //____________________________________________________________________
+// Bool_t AliTRDseedV1::AttachClustersIter(AliTRDtrackingChamber *chamber, Float_t quality, Bool_t kZcorr, AliTRDcluster *c)
+// {
+// //
+// // Iterative process to register clusters to the seed.
+// // In iteration 0 we try only one pad-row and if quality not
+// // sufficient we try 2 pad-rows (about 5% of tracks cross 2 pad-rows)
+// //
+// // debug level 7
+// //
+//
+// if(!fReconstructor->GetRecoParam() ){
+// AliError("Seed can not be used without a valid RecoParam.");
+// return kFALSE;
+// }
+//
+// AliTRDchamberTimeBin *layer = 0x0;
+// if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7){
+// AliTRDtrackingChamber ch(*chamber);
+// ch.SetOwner();
+// TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker);
+// cstreamer << "AttachClustersIter"
+// << "chamber.=" << &ch
+// << "tracklet.=" << this
+// << "\n";
+// }
+//
+// Float_t tquality;
+// Double_t kroady = fReconstructor->GetRecoParam() ->GetRoad1y();
+// Double_t kroadz = fPadLength * .5 + 1.;
+//
+// // initialize configuration parameters
+// Float_t zcorr = kZcorr ? fTilt * (fZfit[0] - fZref[0]) : 0.;
+// Int_t niter = kZcorr ? 1 : 2;
+//
+// Double_t yexp, zexp;
+// Int_t ncl = 0;
+// // start seed update
+// for (Int_t iter = 0; iter < niter; iter++) {
+// ncl = 0;
+// for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
+// if(!(layer = chamber->GetTB(iTime))) continue;
+// if(!Int_t(*layer)) continue;
+//
+// // define searching configuration
+// Double_t dxlayer = layer->GetX() - fX0;
+// if(c){
+// zexp = c->GetZ();
+// //Try 2 pad-rows in second iteration
+// if (iter > 0) {
+// zexp = fZref[0] + fZref[1] * dxlayer - zcorr;
+// if (zexp > c->GetZ()) zexp = c->GetZ() + fPadLength*0.5;
+// if (zexp < c->GetZ()) zexp = c->GetZ() - fPadLength*0.5;
+// }
+// } else zexp = fZref[0] + (kZcorr ? fZref[1] * dxlayer : 0.);
+// yexp = fYref[0] + fYref[1] * dxlayer - zcorr;
+//
+// // Get and register cluster
+// Int_t index = layer->SearchNearestCluster(yexp, zexp, kroady, kroadz);
+// if (index < 0) continue;
+// AliTRDcluster *cl = (*layer)[index];
+//
+// fIndexes[iTime] = layer->GetGlobalIndex(index);
+// fClusters[iTime] = cl;
+// // fY[iTime] = cl->GetY();
+// // fZ[iTime] = cl->GetZ();
+// ncl++;
+// }
+// if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d ncl [%d] = %d", iter, fDet, ncl));
+//
+// if(ncl>1){
+// // calculate length of the time bin (calibration aware)
+// Int_t irp = 0; Float_t x[2]={0., 0.}; Int_t tb[2] = {0,0};
+// for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
+// if(!fClusters[iTime]) continue;
+// x[irp] = fClusters[iTime]->GetX();
+// tb[irp] = iTime;
+// irp++;
+// if(irp==2) break;
+// }
+// Int_t dtb = tb[1] - tb[0];
+// fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
+//
+// // update X0 from the clusters (calibration/alignment aware)
+// for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
+// if(!(layer = chamber->GetTB(iTime))) continue;
+// if(!layer->IsT0()) continue;
+// if(fClusters[iTime]){
+// fX0 = fClusters[iTime]->GetX();
+// break;
+// } else { // we have to infere the position of the anode wire from the other clusters
+// for (Int_t jTime = iTime+1; jTime < AliTRDtrackerV1::GetNTimeBins(); jTime++) {
+// if(!fClusters[jTime]) continue;
+// fX0 = fClusters[jTime]->GetX() + fdX * (jTime - iTime);
+// break;
+// }
+// }
+// }
+//
+// // update YZ reference point
+// // TODO
+//
+// // update x reference positions (calibration/alignment aware)
+// // for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
+// // if(!fClusters[iTime]) continue;
+// // fX[iTime] = fX0 - fClusters[iTime]->GetX();
+// // }
+//
+// FitMI();
+// }
+// if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=7) AliInfo(Form("iter = %d nclFit [%d] = %d", iter, fDet, fN2));
+//
+// if(IsOK()){
+// tquality = GetQuality(kZcorr);
+// if(tquality < quality) break;
+// else quality = tquality;
+// }
+// kroadz *= 2.;
+// } // Loop: iter
+// if (!IsOK()) return kFALSE;
+//
+// if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker)>=1) CookLabels();
+//
+// // load calibration params
+// Calibrate();
+// UpdateUsed();
+// return kTRUE;
+// }
+
//____________________________________________________________________
-Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *chamber
- ,Bool_t kZcorr)
+Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *chamber, Bool_t tilt)
{
//
// Projective algorithm to attach clusters to seeding tracklets
// 5. purge clusters
// 6. fit tracklet
//
-
- if(!AliTRDReconstructor::RecoParam()){
- AliError("Seed can not be used without a valid RecoParam.");
- return kFALSE;
- }
-
- const Int_t kClusterCandidates = 2 * knTimebins;
-
- //define roads
- Double_t kroady = AliTRDReconstructor::RecoParam()->GetRoad1y();
- Double_t kroadz = fPadLength * 1.5 + 1.;
- // correction to y for the tilting angle
- Float_t zcorr = kZcorr ? fTilt * (fZProb - fZref[0]) : 0.;
-
- // working variables
- AliTRDcluster *clusters[kClusterCandidates];
- Double_t cond[4], yexp[knTimebins], zexp[knTimebins],
- yres[kClusterCandidates], zres[kClusterCandidates];
- Int_t ncl, *index = 0x0, tboundary[knTimebins];
-
- // Do cluster projection
- AliTRDchamberTimeBin *layer = 0x0;
- Int_t nYclusters = 0; Bool_t kEXIT = kFALSE;
- for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
- if(!(layer = chamber->GetTB(iTime))) continue;
- if(!Int_t(*layer)) continue;
-
- fX[iTime] = layer->GetX() - fX0;
- zexp[iTime] = fZref[0] + fZref[1] * fX[iTime];
- yexp[iTime] = fYref[0] + fYref[1] * fX[iTime] - zcorr;
-
- // build condition and process clusters
- cond[0] = yexp[iTime] - kroady; cond[1] = yexp[iTime] + kroady;
- cond[2] = zexp[iTime] - kroadz; cond[3] = zexp[iTime] + kroadz;
- layer->GetClusters(cond, index, ncl);
- for(Int_t ic = 0; ic<ncl; ic++){
- AliTRDcluster *c = layer->GetCluster(index[ic]);
- clusters[nYclusters] = c;
- yres[nYclusters++] = c->GetY() - yexp[iTime];
- if(nYclusters >= kClusterCandidates) {
- AliWarning(Form("Cluster candidates reached limit %d. Some may be lost.", kClusterCandidates));
- kEXIT = kTRUE;
- break;
- }
- }
- tboundary[iTime] = nYclusters;
- if(kEXIT) break;
- }
-
- // Evaluate truncated mean on the y direction
- Double_t mean, sigma;
- AliMathBase::EvaluateUni(nYclusters, yres, mean, sigma, Int_t(nYclusters*.8)-2);
- // purge cluster candidates
- Int_t nZclusters = 0;
- for(Int_t ic = 0; ic<nYclusters; ic++){
- if(yres[ic] - mean > 4. * sigma){
- clusters[ic] = 0x0;
- continue;
- }
- zres[nZclusters++] = clusters[ic]->GetZ() - zexp[clusters[ic]->GetLocalTimeBin()];
- }
-
- // Evaluate truncated mean on the z direction
- AliMathBase::EvaluateUni(nZclusters, zres, mean, sigma, Int_t(nZclusters*.8)-2);
- // purge cluster candidates
- for(Int_t ic = 0; ic<nZclusters; ic++){
- if(zres[ic] - mean > 4. * sigma){
- clusters[ic] = 0x0;
- continue;
- }
- }
-
-
- // Select only one cluster/TimeBin
- Int_t lastCluster = 0;
- fN2 = 0;
- for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
- ncl = tboundary[iTime] - lastCluster;
- if(!ncl) continue;
- Int_t iptr = lastCluster;
- if(ncl > 1){
- Float_t dold = 9999.;
- for(int ic=lastCluster; ic<tboundary[iTime]; ic++){
- if(!clusters[ic]) continue;
- Float_t y = yexp[iTime] - clusters[ic]->GetY();
- Float_t z = zexp[iTime] - clusters[ic]->GetZ();
- Float_t d = y * y + z * z;
- if(d > dold) continue;
- dold = d;
- iptr = ic;
- }
- }
- fIndexes[iTime] = chamber->GetTB(iTime)->GetGlobalIndex(iptr);
- fClusters[iTime] = clusters[iptr];
- fY[iTime] = clusters[iptr]->GetY();
- fZ[iTime] = clusters[iptr]->GetZ();
- lastCluster = tboundary[iTime];
- fN2++;
- }
-
- // number of minimum numbers of clusters expected for the tracklet
- Int_t kClmin = Int_t(AliTRDReconstructor::RecoParam()->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins());
- if (fN2 < kClmin){
- AliWarning(Form("Not enough clusters to fit the tracklet %d [%d].", fN2, kClmin));
- fN2 = 0;
+ Bool_t kPRINT = kFALSE;
+ if(!fReconstructor->GetRecoParam() ){
+ AliError("Seed can not be used without a valid RecoParam.");
return kFALSE;
}
+ // Initialize reco params for this tracklet
+ // 1. first time bin in the drift region
+ Int_t t0 = 4;
+ Int_t kClmin = Int_t(fReconstructor->GetRecoParam() ->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins());
+
+ Double_t syRef = TMath::Sqrt(fRefCov[0]);
+ //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);
+
+ // working variables
+ const Int_t kNrows = 16;
+ AliTRDcluster *clst[kNrows][kNclusters];
+ Double_t cond[4], dx, dy, yt, zt,
+ yres[kNrows][kNclusters];
+ Int_t idxs[kNrows][kNclusters], ncl[kNrows], ncls = 0;
+ memset(ncl, 0, kNrows*sizeof(Int_t));
+ memset(clst, 0, kNrows*kNclusters*sizeof(AliTRDcluster*));
+
+ // Do cluster projection
+ AliTRDcluster *c = 0x0;
+ AliTRDchamberTimeBin *layer = 0x0;
+ Bool_t kBUFFER = kFALSE;
+ for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
+ if(!(layer = chamber->GetTB(it))) continue;
+ if(!Int_t(*layer)) continue;
+
+ 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;
+ cond[1] = zt; cond[3] = kroadz;
+ 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;
+ }*/
+ 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;
+ idxs[r][ncl[r]] = idx[ic];
+ yres[r][ncl[r]] = dy;
+ ncl[r]++; ncls++;
+
+ if(ncl[r] >= kNclusters) {
+ AliWarning(Form("Cluster candidates reached limit %d. Some may be lost.", kNclusters));
+ 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(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;
+ }
+ 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];
+ }
+ 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
+ Int_t n = 0;
+ for (Int_t ir = 0; ir < nr; ir++) {
+ Int_t jr = row + ir*lr;
+ if(kPRINT) printf("\tattach %d clusters for row %d\n", ncl[jr], jr);
+ 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+kNtb*ir] = chamber->GetTB(it)->GetGlobalIndex(idxs[jr][ic]);
+ fClusters[it+kNtb*ir] = c;
+
+ //printf("\tid[%2d] it[%d] idx[%d]\n", ic, it, fIndexes[it]);
+
+ n++;
+ }
+ }
- // update used clusters
- fNUsed = 0;
- for (Int_t iTime = 0; iTime < AliTRDtrackerV1::GetNTimeBins(); iTime++) {
- if(!fClusters[iTime]) continue;
- if((fClusters[iTime]->IsUsed())) fNUsed++;
- }
-
- if (fN2-fNUsed < kClmin){
- AliWarning(Form("Too many clusters already in use %d (from %d).", fNUsed, fN2));
- fN2 = 0;
+ // number of minimum numbers of clusters expected for the tracklet
+ if (n < kClmin){
+ //AliWarning(Form("Not enough clusters to fit the tracklet %d [%d].", n, kClmin));
return kFALSE;
}
-
- return kTRUE;
+ SetN(n);
+
+ // 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] = {0.,0.}; Int_t tb[2]={0,0};
+ for (Int_t it = t0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
+ if(!fClusters[it]) continue;
+ x[irp] = fClusters[it]->GetX();
+ tb[irp] = it;
+ irp++;
+ if(irp==2) break;
+ }
+ Int_t dtb = tb[1] - tb[0];
+ fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
+
+ // update X0 from the clusters (calibration/alignment aware) TODO remove dependence on x0 !!
+ for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
+ if(!(layer = chamber->GetTB(it))) continue;
+ if(!layer->IsT0()) continue;
+ if(fClusters[it]){
+ fX0 = fClusters[it]->GetX();
+ break;
+ } else { // we have to infere the position of the anode wire from the other clusters
+ for (Int_t jt = it+1; jt < AliTRDtrackerV1::GetNTimeBins(); jt++) {
+ if(!fClusters[jt]) continue;
+ fX0 = fClusters[jt]->GetX() + fdX * (jt - it);
+ break;
+ }
+ }
+ }
+
+ return kTRUE;
+}
+
+//____________________________________________________________
+void AliTRDseedV1::Bootstrap(const AliTRDReconstructor *rec)
+{
+// Fill in all derived information. It has to be called after recovery from file or HLT.
+// The primitive data are
+// - list of clusters
+// - detector (as the detector will be removed from clusters)
+// - position of anode wire (fX0) - temporary
+// - track reference position and direction
+// - momentum of the track
+// - time bin length [cm]
+//
+// A.Bercuci <A.Bercuci@gsi.de> Oct 30th 2008
+//
+ fReconstructor = 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];
+ Int_t n = 0, nshare = 0, nused = 0;
+ AliTRDcluster **cit = &fClusters[0];
+ for(Int_t ic = kNclusters; ic--; cit++){
+ if(!(*cit)) return;
+ n++;
+ if((*cit)->IsShared()) nshare++;
+ if((*cit)->IsUsed()) nused++;
+ }
+ SetN(n); SetNUsed(nused); SetNShared(nshare);
+ Fit();
+ CookLabels();
+ GetProbability();
}
+
//____________________________________________________________________
-Bool_t AliTRDseedV1::Fit()
+Bool_t AliTRDseedV1::Fit(Bool_t tilt, Int_t errors)
{
//
// Linear fit of the tracklet
// 3. Do a Least Square Fit to the data
//
- const Int_t kClmin = 8;
- const Int_t kNtb = AliTRDtrackerV1::GetNTimeBins();
- AliTRDtrackerV1::AliTRDLeastSquare fitterY, fitterZ;
-
- // convertion factor from square to gauss distribution for sigma
- Double_t convert = 1./TMath::Sqrt(12.);
-
- // book cluster information
- Double_t xc[knTimebins+1], yc[knTimebins], zc[knTimebins+1], sy[knTimebins], sz[knTimebins+1];
- Int_t zRow[knTimebins];
- AliTRDcluster *c = 0x0;
- Int_t nc = 0;
- for (Int_t ic=0; ic<kNtb; ic++) {
- zRow[ic] = -1;
- xc[ic] = -1.;
- yc[ic] = 999.;
- zc[ic] = 999.;
- sy[ic] = 0.;
- sz[ic] = 0.;
- if(!(c = fClusters[ic])) continue;
- if(!c->IsInChamber()) continue;
- Float_t w = 1.;
- if(c->GetNPads()>4) w = .5;
- if(c->GetNPads()>5) w = .2;
- zRow[nc] = c->GetPadRow();
- xc[nc] = fX0 - c->GetX();
- yc[nc] = c->GetY();
- zc[nc] = c->GetZ();
- sy[ic] = w; // all clusters have the same sigma
- sz[ic] = fPadLength*convert;
- fitterZ.AddPoint(&xc[ic], zc[ic], sz[ic]);
- nc++;
- }
- // to few clusters
- if (nc < kClmin) return kFALSE;
-
-
- Int_t zN[2*35];
- Int_t nz = AliTRDtrackerV1::Freq(nc, zRow, zN, kFALSE);
- // more than one pad row crossing
- if(nz>2) return kFALSE;
-
- // estimate reference parameter at average x
- Double_t y0 = fYref[0];
- Double_t dydx = fYref[1];
- Double_t dzdx = fZref[1];
- zc[nc] = fZref[0];
-
- // determine z offset of the fit
- 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<nc; 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;
- xc[nc] = .5 * (xc[ic-1] + xc[ic]);
- zc[nc] = .5 * (zc[ic-1] + zc[ic]);
- sz[nc] = TMath::Max(dzdx * sx, .01);
- dzdx = zc[ic-1] > zc[ic] ? 1. : -1.;
- padRef = zRow[ic];
- nCross = ic;
- nchanges++;
- }
- }
+ if(!IsCalibrated()){
+ AliWarning("Tracklet fit failed. Call Calibrate().");
+ return kFALSE;
+ }
- // condition on nCross and reset nchanges TODO
-
- if(nchanges==1){
- if(dzdx * fZref[1] < 0.){
- AliInfo("tracklet direction does not correspond to the track direction. TODO.");
- }
- SetBit(2, kTRUE); // mark pad row crossing
- fCross[0] = xc[nc]; fCross[2] = zc[nc]; fCross[3] = sz[nc];
- fitterZ.AddPoint(&xc[nc], zc[nc], sz[nc]);
- fitterZ.Eval();
- dzdx = fZref[1]; // we don't trust Parameter[1] ??;
- zc[nc] = fitterZ.GetFunctionParameter(0);
- } else if(nchanges > 1){ // debug
- AliInfo("ERROR in n changes!!!");
- return kFALSE;
- }
+ const Int_t kClmin = 8;
+
+
+ // cluster error parametrization parameters
+ // 1. sy total charge
+ const Float_t sq0inv = 0.019962; // [1/q0]
+ const Float_t sqb = 1.0281564; //[cm]
+ // 2. sy for the PRF
+ const Float_t scy[AliTRDgeometry::kNlayer][4] = {
+ {2.827e-02, 9.600e-04, 4.296e-01, 2.271e-02},
+ {2.952e-02,-2.198e-04, 4.146e-01, 2.339e-02},
+ {3.090e-02, 1.514e-03, 4.020e-01, 2.402e-02},
+ {3.260e-02,-2.037e-03, 3.946e-01, 2.509e-02},
+ {3.439e-02,-3.601e-04, 3.883e-01, 2.623e-02},
+ {3.510e-02, 2.066e-03, 3.651e-01, 2.588e-02},
+ };
+ // 3. sy parallel to the track
+ const Float_t sy0 = 2.649e-02; // [cm]
+ const Float_t sya = -8.864e-04; // [cm]
+ const Float_t syb = -2.435e-01; // [cm]
+
+ // 4. sx parallel to the track
+ const Float_t sxgc = 5.427e-02;
+ const Float_t sxgm = 7.783e-01;
+ const Float_t sxgs = 2.743e-01;
+ const Float_t sxe0 =-2.065e+00;
+ const Float_t sxe1 =-2.978e-02;
+
+ // 5. sx perpendicular to the track
+// const Float_t sxd0 = 1.881e-02;
+// const Float_t sxd1 =-4.101e-01;
+// const Float_t sxd2 = 1.572e+00;
+
+ // get track direction
+ Double_t y0 = fYref[0];
+ Double_t dydx = fYref[1];
+ Double_t z0 = fZref[0];
+ Double_t dzdx = fZref[1];
+ Double_t yt, zt;
+
+ // calculation of tg^2(phi - a_L) and tg^2(a_L)
+ Double_t tgg = (dydx-fExB)/(1.+dydx*fExB); tgg *= tgg;
+ //Double_t exb2= fExB*fExB;
+
+ //AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
+ TLinearFitter fitterY(1, "pol1");
+ // convertion factor from square to gauss distribution for sigma
+ //Double_t convert = 1./TMath::Sqrt(12.);
+
+ // book cluster information
+ Double_t qc[kNclusters], xc[kNclusters], yc[kNclusters], zc[kNclusters], sy[kNclusters];
+
+ Int_t ily = AliTRDgeometry::GetLayer(fDet);
+ Int_t fN = 0;
+ AliTRDcluster *c=0x0, **jc = &fClusters[0];
+ for (Int_t ic=0; ic<kNtb; ic++, ++jc) {
+ //zRow[ic] = -1;
+ xc[ic] = -1.;
+ yc[ic] = 999.;
+ zc[ic] = 999.;
+ sy[ic] = 0.;
+ //sz[ic] = 0.;
+ if(!(c = (*jc))) continue;
+ if(!c->IsInChamber()) continue;
+
+ Float_t w = 1.;
+ if(c->GetNPads()>4) w = .5;
+ if(c->GetNPads()>5) w = .2;
+
+ //zRow[fN] = c->GetPadRow();
+ qc[fN] = TMath::Abs(c->GetQ());
+ // correct cluster position for PRF and v drift
+ //Int_t jc = TMath::Max(fN-3, 0);
+ //xc[fN] = c->GetXloc(fT0, fVD, &qc[jc], &xc[jc]/*, z0 - c->GetX()*dzdx*/);
+ //Double_t s2 = fS2PRF + fDiffL*fDiffL*xc[fN]/(1.+2.*exb2)+tgg*xc[fN]*xc[fN]*exb2/12.;
+ //yc[fN] = c->GetYloc(s2, fPadLength, xc[fN], fExB);
+
+ // uncalibrated cluster correction
+ // TODO remove
+ Double_t x, y; GetClusterXY(c, x, y);
+ xc[fN] = fX0 - x;
+ yc[fN] = y;
+ zc[fN] = c->GetZ();
+
+ // extrapolated y value for the track
+ yt = y0 - xc[fN]*dydx;
+ // extrapolated z value for the track
+ zt = z0 - xc[fN]*dzdx;
+ // tilt correction
+ if(tilt) yc[fN] -= fTilt*(zc[fN] - zt);
+
+ // ELABORATE CLUSTER ERROR
+ // TODO to be moved to AliTRDcluster
+ // basic y error (|| to track).
+ sy[fN] = xc[fN] < AliTRDgeometry::CamHght() ? 2. : sy0 + sya*TMath::Exp(1./(xc[fN]+syb));
+ //printf("cluster[%d]\n\tsy[0] = %5.3e [um]\n", fN, sy[fN]*1.e4);
+ // y error due to total charge
+ sy[fN] += sqb*(1./qc[fN] - sq0inv);
+ //printf("\tsy[1] = %5.3e [um]\n", sy[fN]*1.e4);
+ // y error due to PRF
+ sy[fN] += scy[ily][0]*TMath::Gaus(c->GetCenter(), scy[ily][1], scy[ily][2]) - scy[ily][3];
+ //printf("\tsy[2] = %5.3e [um]\n", sy[fN]*1.e4);
+
+ sy[fN] *= sy[fN];
+
+ // ADD ERROR ON x
+ // error of drift length parallel to the track
+ Double_t sx = sxgc*TMath::Gaus(xc[fN], sxgm, sxgs) + TMath::Exp(sxe0+sxe1*xc[fN]); // [cm]
+ //printf("\tsx[0] = %5.3e [um]\n", sx*1.e4);
+ // error of drift length perpendicular to the track
+ //sx += sxd0 + sxd1*d + sxd2*d*d;
+ sx *= sx; // square sx
+
+ // add error from ExB
+ if(errors>0) sy[fN] += fExB*fExB*sx;
+ //printf("\tsy[3] = %5.3e [um^2]\n", sy[fN]*1.e8);
+
+ // global radial error due to misalignment/miscalibration
+ Double_t sx0 = 0.; sx0 *= sx0;
+ // add sx contribution to sy due to track angle
+ if(errors>1) sy[fN] += tgg*(sx+sx0);
+ // TODO we should add tilt pad correction here
+ //printf("\tsy[4] = %5.3e [um^2]\n", sy[fN]*1.e8);
+ c->SetSigmaY2(sy[fN]);
+
+ sy[fN] = TMath::Sqrt(sy[fN]);
+ fitterY.AddPoint(&xc[fN], yc[fN], sy[fN]);
+ fN++;
+ }
+ // to few clusters
+ if (fN < kClmin) return kFALSE;
+
+ // fit XY
+ fitterY.Eval();
+ fYfit[0] = fitterY.GetParameter(0);
+ fYfit[1] = -fitterY.GetParameter(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
+ // the ref radial position is set at the minimum of
+ // the y variance of the tracklet
+ fX = -fCov[1]/fCov[2]; //fXref = fX0 - fXref;
+ fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2];
+
+ // fit XZ
+ if(IsRowCross()){
+ // TODO pad row cross position estimation !!!
+ //AliInfo(Form("Padrow cross in detector %d", fDet));
+ fZfit[0] = .5*(zc[0]+zc[fN-1]); fZfit[1] = 0.;
+ fS2Z = 0.02+1.55*fZref[1]; fS2Z *= fS2Z;
+ } else {
+ fZfit[0] = zc[0]; fZfit[1] = 0.;
+ fS2Z = fPadLength*fPadLength/12.;
+ }
-
- // estimate deviation from reference direction
- dzdx *= fTilt;
- for (Int_t ic=0; ic<nc; ic++) {
- yc[ic] -= y0 + xc[ic]*(dydx + dzdx) + fTilt * (zc[ic] - zc[nc]);
- fitterY.AddPoint(&xc[ic], yc[ic], sy[ic]);
- }
- fitterY.Eval();
- fYfit[0] = y0+fitterY.GetFunctionParameter(0);
- fYfit[1] = dydx+fitterY.GetFunctionParameter(1);
- if(nchanges) fCross[1] = fYfit[0] + fCross[0] * fYfit[1];
-// printf("\nnz = %d\n", nz);
-// for(int ic=0; ic<35; ic++) printf("%d row[%d]\n", ic, zRow[ic]);
+// // 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
//
-// for(int ic=0; ic<nz; ic++) printf("%d n[%d]\n", ic, zN[ic]);
+// 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];
+// }
- return kTRUE;
+ return kTRUE;
}
-//___________________________________________________________________
-void AliTRDseedV1::Draw(Option_t*)
+
+/*
+//_____________________________________________________________________________
+void AliTRDseedV1::FitMI()
{
-}
+//
+// Fit the seed.
+// Marian Ivanov's version
+//
+// linear fit on the y direction with respect to the reference direction.
+// The residuals for each x (x = xc - x0) are deduced from:
+// dy = y - yt (1)
+// the tilting correction is written :
+// y = yc + h*(zc-zt) (2)
+// yt = y0+dy/dx*x (3)
+// zt = z0+dz/dx*x (4)
+// from (1),(2),(3) and (4)
+// dy = yc - y0 - (dy/dx + h*dz/dx)*x + h*(zc-z0)
+// the last term introduces the correction on y direction due to tilting pads. There are 2 ways to account for this:
+// 1. use tilting correction for calculating the y
+// 2. neglect tilting correction here and account for it in the error parametrization of the tracklet.
+ const Float_t kRatio = 0.8;
+ const Int_t kClmin = 5;
+ const Float_t kmaxtan = 2;
+
+ if (TMath::Abs(fYref[1]) > kmaxtan){
+ //printf("Exit: Abs(fYref[1]) = %3.3f, kmaxtan = %3.3f\n", TMath::Abs(fYref[1]), kmaxtan);
+ return; // Track inclined too much
+ }
+
+ Float_t sigmaexp = 0.05 + TMath::Abs(fYref[1] * 0.25); // Expected r.m.s in y direction
+ Float_t ycrosscor = fPadLength * fTilt * 0.5; // Y correction for crossing
+ Int_t fNChange = 0;
+
+ Double_t sumw;
+ Double_t sumwx;
+ Double_t sumwx2;
+ Double_t sumwy;
+ Double_t sumwxy;
+ Double_t sumwz;
+ Double_t sumwxz;
+
+ // Buffering: Leave it constant fot Performance issues
+ Int_t zints[kNtb]; // Histograming of the z coordinate
+ // Get 1 and second max probable coodinates in z
+ Int_t zouts[2*kNtb];
+ Float_t allowedz[kNtb]; // Allowed z for given time bin
+ Float_t yres[kNtb]; // Residuals from reference
+ //Float_t anglecor = fTilt * fZref[1]; // Correction to the angle
+
+ Float_t pos[3*kNtb]; memset(pos, 0, 3*kNtb*sizeof(Float_t));
+ Float_t *fX = &pos[0], *fY = &pos[kNtb], *fZ = &pos[2*kNtb];
+
+ Int_t fN = 0; AliTRDcluster *c = 0x0;
+ fN2 = 0;
+ for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
+ yres[i] = 10000.0;
+ if (!(c = fClusters[i])) continue;
+ if(!c->IsInChamber()) continue;
+ // Residual y
+ //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + fTilt*(fZ[i] - fZref[0]);
+ fX[i] = fX0 - c->GetX();
+ fY[i] = c->GetY();
+ fZ[i] = c->GetZ();
+ yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
+ zints[fN] = Int_t(fZ[i]);
+ fN++;
+ }
+
+ if (fN < kClmin){
+ //printf("Exit fN < kClmin: fN = %d\n", fN);
+ return;
+ }
+ Int_t nz = AliTRDtrackerV1::Freq(fN, zints, zouts, kFALSE);
+ Float_t fZProb = zouts[0];
+ if (nz <= 1) zouts[3] = 0;
+ if (zouts[1] + zouts[3] < kClmin) {
+ //printf("Exit zouts[1] = %d, zouts[3] = %d\n",zouts[1],zouts[3]);
+ return;
+ }
+
+ // Z distance bigger than pad - length
+ if (TMath::Abs(zouts[0]-zouts[2]) > 12.0) zouts[3] = 0;
+
+ Int_t breaktime = -1;
+ Bool_t mbefore = kFALSE;
+ Int_t cumul[kNtb][2];
+ Int_t counts[2] = { 0, 0 };
+
+ if (zouts[3] >= 3) {
+
+ //
+ // Find the break time allowing one chage on pad-rows
+ // with maximal number of accepted clusters
+ //
+ fNChange = 1;
+ for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
+ cumul[i][0] = counts[0];
+ cumul[i][1] = counts[1];
+ if (TMath::Abs(fZ[i]-zouts[0]) < 2) counts[0]++;
+ if (TMath::Abs(fZ[i]-zouts[2]) < 2) counts[1]++;
+ }
+ Int_t maxcount = 0;
+ for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
+ Int_t after = cumul[AliTRDtrackerV1::GetNTimeBins()][0] - cumul[i][0];
+ Int_t before = cumul[i][1];
+ if (after + before > maxcount) {
+ maxcount = after + before;
+ breaktime = i;
+ mbefore = kFALSE;
+ }
+ after = cumul[AliTRDtrackerV1::GetNTimeBins()-1][1] - cumul[i][1];
+ before = cumul[i][0];
+ if (after + before > maxcount) {
+ maxcount = after + before;
+ breaktime = i;
+ mbefore = kTRUE;
+ }
+ }
+ breaktime -= 1;
+ }
+
+ for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
+ if (i > breaktime) allowedz[i] = mbefore ? zouts[2] : zouts[0];
+ if (i <= breaktime) allowedz[i] = (!mbefore) ? zouts[2] : zouts[0];
+ }
+
+ if (((allowedz[0] > allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] < 0)) ||
+ ((allowedz[0] < allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] > 0))) {
+ //
+ // Tracklet z-direction not in correspondance with track z direction
+ //
+ fNChange = 0;
+ for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
+ allowedz[i] = zouts[0]; // Only longest taken
+ }
+ }
+
+ if (fNChange > 0) {
+ //
+ // Cross pad -row tracklet - take the step change into account
+ //
+ for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
+ if (!fClusters[i]) continue;
+ if(!fClusters[i]->IsInChamber()) continue;
+ if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue;
+ // Residual y
+ //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + fTilt*(fZ[i] - fZref[0]);
+ yres[i] = fY[i] - fTilt*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
+// if (TMath::Abs(fZ[i] - fZProb) > 2) {
+// if (fZ[i] > fZProb) yres[i] += fTilt * fPadLength;
+// if (fZ[i] < fZProb) yres[i] -= fTilt * fPadLength;
+ }
+ }
+ }
+
+ Double_t yres2[kNtb];
+ Double_t mean;
+ Double_t sigma;
+ for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
+ if (!fClusters[i]) continue;
+ if(!fClusters[i]->IsInChamber()) continue;
+ if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue;
+ yres2[fN2] = yres[i];
+ fN2++;
+ }
+ if (fN2 < kClmin) {
+ //printf("Exit fN2 < kClmin: fN2 = %d\n", fN2);
+ fN2 = 0;
+ return;
+ }
+ AliMathBase::EvaluateUni(fN2,yres2,mean,sigma, Int_t(fN2*kRatio-2.));
+ if (sigma < sigmaexp * 0.8) {
+ sigma = sigmaexp;
+ }
+ //Float_t fSigmaY = sigma;
+
+ // Reset sums
+ sumw = 0;
+ sumwx = 0;
+ sumwx2 = 0;
+ sumwy = 0;
+ sumwxy = 0;
+ sumwz = 0;
+ sumwxz = 0;
+
+ fN2 = 0;
+ Float_t fMeanz = 0;
+ Float_t fMPads = 0;
+ fUsable = 0;
+ for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
+ if (!fClusters[i]) continue;
+ if (!fClusters[i]->IsInChamber()) continue;
+ if (TMath::Abs(fZ[i] - allowedz[i]) > 2){fClusters[i] = 0x0; continue;}
+ if (TMath::Abs(yres[i] - mean) > 4.0 * sigma){fClusters[i] = 0x0; continue;}
+ SETBIT(fUsable,i);
+ fN2++;
+ fMPads += fClusters[i]->GetNPads();
+ Float_t weight = 1.0;
+ if (fClusters[i]->GetNPads() > 4) weight = 0.5;
+ if (fClusters[i]->GetNPads() > 5) weight = 0.2;
+
+
+ Double_t x = fX[i];
+ //printf("x = %7.3f dy = %7.3f fit %7.3f\n", x, yres[i], fY[i]-yres[i]);
+
+ sumw += weight;
+ sumwx += x * weight;
+ sumwx2 += x*x * weight;
+ sumwy += weight * yres[i];
+ sumwxy += weight * (yres[i]) * x;
+ sumwz += weight * fZ[i];
+ sumwxz += weight * fZ[i] * x;
+
+ }
+
+ if (fN2 < kClmin){
+ //printf("Exit fN2 < kClmin(2): fN2 = %d\n",fN2);
+ fN2 = 0;
+ return;
+ }
+ fMeanz = sumwz / sumw;
+ Float_t correction = 0;
+ if (fNChange > 0) {
+ // Tracklet on boundary
+ if (fMeanz < fZProb) correction = ycrosscor;
+ if (fMeanz > fZProb) correction = -ycrosscor;
+ }
+
+ Double_t det = sumw * sumwx2 - sumwx * sumwx;
+ fYfit[0] = (sumwx2 * sumwy - sumwx * sumwxy) / det;
+ fYfit[1] = (sumw * sumwxy - sumwx * sumwy) / det;
+
+ fS2Y = 0;
+ for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
+ if (!TESTBIT(fUsable,i)) continue;
+ Float_t delta = yres[i] - fYfit[0] - fYfit[1] * fX[i];
+ fS2Y += delta*delta;
+ }
+ fS2Y = TMath::Sqrt(fS2Y / Float_t(fN2-2));
+ // TEMPORARY UNTIL covariance properly calculated
+ fS2Y = TMath::Max(fS2Y, Float_t(.1));
+
+ fZfit[0] = (sumwx2 * sumwz - sumwx * sumwxz) / det;
+ fZfit[1] = (sumw * sumwxz - sumwx * sumwz) / det;
+// fYfitR[0] += fYref[0] + correction;
+// fYfitR[1] += fYref[1];
+// fYfit[0] = fYfitR[0];
+ fYfit[1] = -fYfit[1];
+
+ UpdateUsed();
+}*/
//___________________________________________________________________
-void AliTRDseedV1::Print(Option_t*) const
+void AliTRDseedV1::Print(Option_t *o) const
{
//
// Printing the seedstatus
//
- printf("Seed status :\n");
- printf(" fTilt = %f\n", fTilt);
- printf(" fPadLength = %f\n", fPadLength);
- printf(" fX0 = %f\n", fX0);
- for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++) {
- const Char_t *isUsable = fUsable[ic]?"Yes":"No";
- printf(" %d X[%f] Y[%f] Z[%f] Indexes[%d] clusters[%p] usable[%s]\n"
- , ic
- , fX[ic]
- , fY[ic]
- , fZ[ic]
- , fIndexes[ic]
- , ((void*) fClusters[ic])
- , isUsable);
- }
-
- printf(" fYref[0] =%f fYref[1] =%f\n", fYref[0], fYref[1]);
- printf(" fZref[0] =%f fZref[1] =%f\n", fZref[0], fZref[1]);
- printf(" fYfit[0] =%f fYfit[1] =%f\n", fYfit[0], fYfit[1]);
- printf(" fYfitR[0]=%f fYfitR[1]=%f\n", fYfitR[0], fYfitR[1]);
- printf(" fZfit[0] =%f fZfit[1] =%f\n", fZfit[0], fZfit[1]);
- printf(" fZfitR[0]=%f fZfitR[1]=%f\n", fZfitR[0], fZfitR[1]);
- printf(" fSigmaY =%f\n", fSigmaY);
- printf(" fSigmaY2=%f\n", fSigmaY2);
- printf(" fMeanz =%f\n", fMeanz);
- printf(" fZProb =%f\n", fZProb);
- printf(" fLabels[0]=%d fLabels[1]=%d\n", fLabels[0], fLabels[1]);
- printf(" fN =%d\n", fN);
- printf(" fN2 =%d (>8 isOK)\n",fN2);
- printf(" fNUsed =%d\n", fNUsed);
- printf(" fFreq =%d\n", fFreq);
- printf(" fNChange=%d\n", fNChange);
- printf(" fMPads =%f\n", fMPads);
-
- printf(" fC =%f\n", fC);
- printf(" fCC =%f\n",fCC);
- printf(" fChi2 =%f\n", fChi2);
- printf(" fChi2Z =%f\n", fChi2Z);
+ AliInfo(Form("Det[%3d] Tilt[%+6.2f] Pad[%5.2f]", fDet, fTilt, fPadLength));
+ AliInfo(Form("N[%2d] Nused[%2d] Nshared[%2d]", GetN(), GetNUsed(), GetNShared()));
+ 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]))
+
+
+ if(strcmp(o, "a")!=0) return;
+
+ AliTRDcluster* const* jc = &fClusters[0];
+ for(int ic=0; ic<kNclusters; ic++, jc++) {
+ if(!(*jc)) continue;
+ (*jc)->Print(o);
+ }
}
+
+//___________________________________________________________________
+Bool_t AliTRDseedV1::IsEqual(const TObject *o) const
+{
+ // Checks if current instance of the class has the same essential members
+ // as the given one
+
+ if(!o) return kFALSE;
+ const AliTRDseedV1 *inTracklet = dynamic_cast<const AliTRDseedV1*>(o);
+ if(!inTracklet) return kFALSE;
+
+ for (Int_t i = 0; i < 2; i++){
+ if ( fYref[i] != inTracklet->fYref[i] ) return kFALSE;
+ if ( fZref[i] != inTracklet->fZref[i] ) return kFALSE;
+ }
+
+ if ( fS2Y != inTracklet->fS2Y ) return kFALSE;
+ if ( fTilt != inTracklet->fTilt ) return kFALSE;
+ if ( fPadLength != inTracklet->fPadLength ) 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->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 ( 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->fC ) return kFALSE;
+ //if ( fCC != inTracklet->GetCC() ) return kFALSE;
+ if ( fChi2 != inTracklet->fChi2 ) return kFALSE;
+ // if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE;
+
+ if ( fDet != inTracklet->fDet ) return kFALSE;
+ if ( fMom != inTracklet->fMom ) return kFALSE;
+ if ( fdX != inTracklet->fdX ) return kFALSE;
+
+ for (Int_t iCluster = 0; iCluster < kNclusters; iCluster++){
+ AliTRDcluster *curCluster = fClusters[iCluster];
+ AliTRDcluster *inCluster = inTracklet->fClusters[iCluster];
+ if (curCluster && inCluster){
+ if (! curCluster->IsEqual(inCluster) ) {
+ curCluster->Print();
+ inCluster->Print();
+ return kFALSE;
+ }
+ } else {
+ // if one cluster exists, and corresponding
+ // in other tracklet doesn't - return kFALSE
+ if(curCluster || inCluster) return kFALSE;
+ }
+ }
+ return kTRUE;
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff