+
/**************************************************************************
- * 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 <Riostream.h>
-#include <stdio.h>
-#include <string.h>
+// #include <Riostream.h>
+// #include <stdio.h>
+// #include <string.h>
#include <TBranch.h>
-#include <TFile.h>
-#include <TGraph.h>
-#include <TH1D.h>
-#include <TH2D.h>
+#include <TDirectory.h>
#include <TLinearFitter.h>
-#include <TObjArray.h>
-#include <TROOT.h>
#include <TTree.h>
#include <TClonesArray.h>
-#include <TRandom.h>
#include <TTreeStream.h>
#include "AliLog.h"
#include "AliESDEvent.h"
-#include "AliAlignObj.h"
+#include "AliGeomManager.h"
#include "AliRieman.h"
#include "AliTrackPointArray.h"
-#include "AliTRDtracker.h"
-#include "AliTRDtrackerV1.h"
#include "AliTRDgeometry.h"
#include "AliTRDpadPlane.h"
-#include "AliTRDgeometry.h"
-#include "AliTRDcluster.h"
-#include "AliTRDtrack.h"
-#include "AliTRDseed.h"
#include "AliTRDcalibDB.h"
-#include "AliTRDCommonParam.h"
#include "AliTRDReconstructor.h"
#include "AliTRDCalibraFillHisto.h"
-#include "AliTRDtrackerFitter.h"
-#include "AliTRDstackLayer.h"
#include "AliTRDrecoParam.h"
+
+#include "AliTRDcluster.h"
#include "AliTRDseedV1.h"
+#include "AliTRDtrackV1.h"
+#include "AliTRDtrackerV1.h"
+#include "AliTRDtrackerDebug.h"
+#include "AliTRDtrackingChamber.h"
+#include "AliTRDchamberTimeBin.h"
+
-#define DEBUG
ClassImp(AliTRDtrackerV1)
+
+
+const Float_t AliTRDtrackerV1::fgkMinClustersInTrack = 0.5; //
+const Float_t AliTRDtrackerV1::fgkLabelFraction = 0.8; //
+const Double_t AliTRDtrackerV1::fgkMaxChi2 = 12.0; //
+const Double_t AliTRDtrackerV1::fgkMaxSnp = 0.95; // Maximum local sine of the azimuthal angle
+const Double_t AliTRDtrackerV1::fgkMaxStep = 2.0; // Maximal step size in propagation
Double_t AliTRDtrackerV1::fgTopologicQA[kNConfigs] = {
- 0.1112, 0.1112, 0.1112, 0.0786, 0.0786,
- 0.0786, 0.0786, 0.0579, 0.0579, 0.0474,
- 0.0474, 0.0408, 0.0335, 0.0335, 0.0335
+ 0.1112, 0.1112, 0.1112, 0.0786, 0.0786,
+ 0.0786, 0.0786, 0.0579, 0.0579, 0.0474,
+ 0.0474, 0.0408, 0.0335, 0.0335, 0.0335
};
+Int_t AliTRDtrackerV1::fgNTimeBins = 0;
+TTreeSRedirector *AliTRDtrackerV1::fgDebugStreamer = 0x0;
+AliRieman* AliTRDtrackerV1::fgRieman = 0x0;
+TLinearFitter* AliTRDtrackerV1::fgTiltedRieman = 0x0;
+TLinearFitter* AliTRDtrackerV1::fgTiltedRiemanConstrained = 0x0;
//____________________________________________________________________
-AliTRDtrackerV1::AliTRDtrackerV1(AliTRDrecoParam *p)
- :AliTRDtracker()
- ,fSieveSeeding(0)
- ,fRecoParam(p)
- ,fFitter(0x0)
- ,fDebugStreamerV1(0x0)
+AliTRDtrackerV1::AliTRDtrackerV1()
+ :AliTracker()
+ ,fGeom(new AliTRDgeometry())
+ ,fClusters(0x0)
+ ,fTracklets(0x0)
+ ,fTracks(0x0)
+ ,fSieveSeeding(0)
{
- //
- // Default constructor. Nothing is initialized.
- //
+ //
+ // Default constructor.
+ //
+ if (!AliTRDcalibDB::Instance()) {
+ AliFatal("Could not get calibration object");
+ }
+ fgNTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
+ for (Int_t isector = 0; isector < AliTRDgeometry::kNsect; isector++) new(&fTrSec[isector]) AliTRDtrackingSector(fGeom, isector);
+
+ if(AliTRDReconstructor::StreamLevel() > 1){
+ TDirectory *savedir = gDirectory;
+ fgDebugStreamer = new TTreeSRedirector("TRD.TrackerDebug.root");
+ savedir->cd();
+ }
+}
+
+//____________________________________________________________________
+AliTRDtrackerV1::~AliTRDtrackerV1()
+{
+ //
+ // Destructor
+ //
+
+ if(fgDebugStreamer) delete fgDebugStreamer;
+ if(fgRieman) delete fgRieman;
+ if(fgTiltedRieman) delete fgTiltedRieman;
+ if(fgTiltedRiemanConstrained) delete fgTiltedRiemanConstrained;
+ if(fTracks) {fTracks->Delete(); delete fTracks;}
+ if(fTracklets) {fTracklets->Delete(); delete fTracklets;}
+ if(fClusters) {fClusters->Delete(); delete fClusters;}
+ if(fGeom) delete fGeom;
}
//____________________________________________________________________
-AliTRDtrackerV1::AliTRDtrackerV1(const TFile *in, AliTRDrecoParam *p)
- :AliTRDtracker(in)
- ,fSieveSeeding(0)
- ,fRecoParam(p)
- ,fFitter(0x0)
- ,fDebugStreamerV1(0x0)
+Int_t AliTRDtrackerV1::Clusters2Tracks(AliESDEvent *esd)
{
- //
- // Standard constructor.
- // Setting of the geometry file, debug output (if enabled)
- // and initilize fitter helper.
- //
+ //
+ // Steering stand alone tracking for full TRD detector
+ //
+ // Parameters :
+ // esd : The ESD event. On output it contains
+ // the ESD tracks found in TRD.
+ //
+ // Output :
+ // Number of tracks found in the TRD detector.
+ //
+ // Detailed description
+ // 1. Launch individual SM trackers.
+ // See AliTRDtrackerV1::Clusters2TracksSM() for details.
+ //
+
+ if(!AliTRDReconstructor::RecoParam()){
+ AliError("Reconstruction configuration not initialized. Call first AliTRDReconstructor::SetRecoParam().");
+ return 0;
+ }
+
+ //AliInfo("Start Track Finder ...");
+ Int_t ntracks = 0;
+ for(int ism=0; ism<AliTRDgeometry::kNsect; ism++){
+ // for(int ism=1; ism<2; ism++){
+ //AliInfo(Form("Processing supermodule %i ...", ism));
+ ntracks += Clusters2TracksSM(ism, esd);
+ }
+ AliInfo(Form("Number of found tracks : %d", ntracks));
+ return ntracks;
+}
- fFitter = new AliTRDtrackerFitter();
-#ifdef DEBUG
- fDebugStreamerV1 = new TTreeSRedirector("TRDdebug.root");
- fFitter->SetDebugStream(fDebugStreamerV1);
-#endif
+//_____________________________________________________________________________
+Bool_t AliTRDtrackerV1::GetTrackPoint(Int_t index, AliTrackPoint &p) const
+{
+ //AliInfo(Form("Asking for tracklet %d", index));
+
+ if(index<0) return kFALSE;
+ AliTRDseedV1 *tracklet = 0x0;
+ if(!(tracklet = (AliTRDseedV1*)fTracklets->UncheckedAt(index))) return kFALSE;
+
+ // get detector for this tracklet
+ AliTRDcluster *cl = 0x0;
+ Int_t ic = 0; do; while(!(cl = tracklet->GetClusters(ic++)));
+ Int_t idet = cl->GetDetector();
+
+ Double_t local[3];
+ local[0] = tracklet->GetX0();
+ local[1] = tracklet->GetYfit(0);
+ local[2] = tracklet->GetZfit(0);
+ Double_t global[3];
+ fGeom->RotateBack(idet, local, global);
+ p.SetXYZ(global[0],global[1],global[2]);
+
+
+ // setting volume id
+ AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
+ switch (fGeom->GetPlane(idet)) {
+ case 0:
+ iLayer = AliGeomManager::kTRD1;
+ break;
+ case 1:
+ iLayer = AliGeomManager::kTRD2;
+ break;
+ case 2:
+ iLayer = AliGeomManager::kTRD3;
+ break;
+ case 3:
+ iLayer = AliGeomManager::kTRD4;
+ break;
+ case 4:
+ iLayer = AliGeomManager::kTRD5;
+ break;
+ case 5:
+ iLayer = AliGeomManager::kTRD6;
+ break;
+ };
+ Int_t modId = fGeom->GetSector(idet) * fGeom->Ncham() + fGeom->GetChamber(idet);
+ UShort_t volid = AliGeomManager::LayerToVolUID(iLayer, modId);
+ p.SetVolumeID(volid);
+
+ return kTRUE;
+}
+//____________________________________________________________________
+TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitter()
+{
+ if(!fgTiltedRieman) fgTiltedRieman = new TLinearFitter(4, "hyp4");
+ return fgTiltedRieman;
}
-
+
//____________________________________________________________________
-AliTRDtrackerV1::~AliTRDtrackerV1()
+TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitterConstraint()
+{
+ if(!fgTiltedRiemanConstrained) fgTiltedRiemanConstrained = new TLinearFitter(2, "hyp2");
+ return fgTiltedRiemanConstrained;
+}
+
+//____________________________________________________________________
+AliRieman* AliTRDtrackerV1::GetRiemanFitter()
+{
+ if(!fgRieman) fgRieman = new AliRieman(AliTRDtrackingChamber::kNTimeBins * AliTRDgeometry::kNplan);
+ return fgRieman;
+}
+
+//_____________________________________________________________________________
+Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event)
+{
+ //
+ // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
+ // backpropagated by the TPC tracker. Each seed is first propagated
+ // to the TRD, and then its prolongation is searched in the TRD.
+ // If sufficiently long continuation of the track is found in the TRD
+ // the track is updated, otherwise it's stored as originaly defined
+ // by the TPC tracker.
+ //
+
+ // Calibration monitor
+ AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance();
+ if (!calibra) AliInfo("Could not get Calibra instance\n");
+
+ Int_t found = 0; // number of tracks found
+ Float_t foundMin = 20.0;
+
+ Int_t nSeed = event->GetNumberOfTracks();
+ if(!nSeed){
+ // run stand alone tracking
+ if (AliTRDReconstructor::SeedingOn()) Clusters2Tracks(event);
+ return 0;
+ }
+
+ Float_t *quality = new Float_t[nSeed];
+ Int_t *index = new Int_t[nSeed];
+ for (Int_t iSeed = 0; iSeed < nSeed; iSeed++) {
+ AliESDtrack *seed = event->GetTrack(iSeed);
+ Double_t covariance[15];
+ seed->GetExternalCovariance(covariance);
+ quality[iSeed] = covariance[0] + covariance[2];
+ }
+ // Sort tracks according to covariance of local Y and Z
+ TMath::Sort(nSeed,quality,index,kFALSE);
+
+ // Backpropagate all seeds
+ Int_t expectedClr;
+ AliTRDtrackV1 track;
+ for (Int_t iSeed = 0; iSeed < nSeed; iSeed++) {
+
+ // Get the seeds in sorted sequence
+ AliESDtrack *seed = event->GetTrack(index[iSeed]);
+
+ // Check the seed status
+ ULong_t status = seed->GetStatus();
+ if ((status & AliESDtrack::kTPCout) == 0) continue;
+ if ((status & AliESDtrack::kTRDout) != 0) continue;
+
+ // Do the back prolongation
+ Int_t lbl = seed->GetLabel();
+ new(&track) AliTRDtrackV1(*seed);
+ //track->Print();
+ track.SetSeedLabel(lbl);
+ seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); // Make backup
+ Float_t p4 = track.GetC();
+ if((expectedClr = FollowBackProlongation(track))){
+ // computes PID for track
+ track.CookPID();
+ // update calibration references using this track
+ if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(&track);
+ // save calibration object
+ if ((track.GetNumberOfClusters() > 15) && (track.GetNumberOfClusters() > 0.5*expectedClr)) {
+ seed->UpdateTrackParams(&track, AliESDtrack::kTRDout);
+
+ track.UpdateESDtrack(seed);
+
+ // Add TRD track to ESDfriendTrack
+ if (AliTRDReconstructor::StreamLevel() > 0 /*&& quality TODO*/){
+ AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(track);
+ calibTrack->SetOwner();
+ seed->AddCalibObject(calibTrack);
+ }
+ }
+ }
+
+ if ((TMath::Abs(track.GetC() - p4) / TMath::Abs(p4) < 0.2) ||(track.Pt() > 0.8)) {
+ //
+ // Make backup for back propagation
+ //
+ Int_t foundClr = track.GetNumberOfClusters();
+ if (foundClr >= foundMin) {
+ //AliInfo(Form("Making backup track ncls [%d]...", foundClr));
+ track.CookdEdx();
+ track.CookdEdxTimBin(seed->GetID());
+ track.CookLabel(1. - fgkLabelFraction);
+ if(track.GetBackupTrack()) UseClusters(track.GetBackupTrack());
+
+
+ // Sign only gold tracks
+ if (track.GetChi2() / track.GetNumberOfClusters() < 4) {
+ if ((seed->GetKinkIndex(0) == 0) && (track.Pt() < 1.5)) UseClusters(&track);
+ }
+ Bool_t isGold = kFALSE;
+
+ // Full gold track
+ if (track.GetChi2() / track.GetNumberOfClusters() < 5) {
+ if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup);
+
+ isGold = kTRUE;
+ }
+
+ // Almost gold track
+ if ((!isGold) && (track.GetNCross() == 0) && (track.GetChi2() / track.GetNumberOfClusters() < 7)) {
+ //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
+ if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup);
+
+ isGold = kTRUE;
+ }
+
+ if ((!isGold) && (track.GetBackupTrack())) {
+ if ((track.GetBackupTrack()->GetNumberOfClusters() > foundMin) && ((track.GetBackupTrack()->GetChi2()/(track.GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
+ seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup);
+ isGold = kTRUE;
+ }
+ }
+
+ //if ((track->StatusForTOF() > 0) && (track->GetNCross() == 0) && (Float_t(track->GetNumberOfClusters()) / Float_t(track->GetNExpected()) > 0.4)) {
+ //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
+ //}
+ }
+ }
+
+ // Propagation to the TOF (I.Belikov)
+ if (track.GetStop() == kFALSE) {
+ Double_t xtof = 371.0;
+ Double_t xTOF0 = 370.0;
+
+ Double_t c2 = track.GetSnp() + track.GetC() * (xtof - track.GetX());
+ if (TMath::Abs(c2) >= 0.99) continue;
+
+ PropagateToX(track, xTOF0, fgkMaxStep);
+
+ // Energy losses taken to the account - check one more time
+ c2 = track.GetSnp() + track.GetC() * (xtof - track.GetX());
+ if (TMath::Abs(c2) >= 0.99) continue;
+
+ //if (!PropagateToX(*track,xTOF0,fgkMaxStep)) {
+ // fHBackfit->Fill(7);
+ //delete track;
+ // continue;
+ //}
+
+ Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha());
+ Double_t y;
+ track.GetYAt(xtof,GetBz(),y);
+ if (y > ymax) {
+ if (!track.Rotate( AliTRDgeometry::GetAlpha())) continue;
+ }else if (y < -ymax) {
+ if (!track.Rotate(-AliTRDgeometry::GetAlpha())) continue;
+ }
+
+ if (track.PropagateTo(xtof)) {
+ seed->UpdateTrackParams(&track, AliESDtrack::kTRDout);
+ track.UpdateESDtrack(seed);
+
+ // Add TRD track to ESDfriendTrack
+// if (AliTRDReconstructor::StreamLevel() > 0 /*&& quality TODO*/){
+// AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(track);
+// calibTrack->SetOwner();
+// seed->AddCalibObject(calibTrack);
+// }
+ found++;
+ }
+ } else {
+ if ((track.GetNumberOfClusters() > 15) && (track.GetNumberOfClusters() > 0.5*expectedClr)) {
+ seed->UpdateTrackParams(&track, AliESDtrack::kTRDout);
+
+ track.UpdateESDtrack(seed);
+
+ // Add TRD track to ESDfriendTrack
+// if (AliTRDReconstructor::StreamLevel() > 0 /*&& quality TODO*/){
+// AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(track);
+// calibTrack->SetOwner();
+// seed->AddCalibObject(calibTrack);
+// }
+ found++;
+ }
+ }
+
+ seed->SetTRDQuality(track.StatusForTOF());
+ seed->SetTRDBudget(track.GetBudget(0));
+ }
+
+
+ AliInfo(Form("Number of seeds: %d", nSeed));
+ AliInfo(Form("Number of back propagated TRD tracks: %d", found));
+
+ delete [] index;
+ delete [] quality;
+
+ return 0;
+}
+
+
+//____________________________________________________________________
+Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event)
+{
+ //
+ // Refits tracks within the TRD. The ESD event is expected to contain seeds
+ // at the outer part of the TRD.
+ // The tracks are propagated to the innermost time bin
+ // of the TRD and the ESD event is updated
+ // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
+ //
+
+ Int_t nseed = 0; // contor for loaded seeds
+ Int_t found = 0; // contor for updated TRD tracks
+
+
+ AliTRDtrackV1 track;
+ for (Int_t itrack = 0; itrack < event->GetNumberOfTracks(); itrack++) {
+ AliESDtrack *seed = event->GetTrack(itrack);
+ new(&track) AliTRDtrackV1(*seed);
+
+ if (track.GetX() < 270.0) {
+ seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup);
+ continue;
+ }
+
+ ULong_t status = seed->GetStatus();
+ if((status & AliESDtrack::kTRDout) == 0) continue;
+ if((status & AliESDtrack::kTRDin) != 0) continue;
+ nseed++;
+
+ track.ResetCovariance(50.0);
+
+ // do the propagation and processing
+ Bool_t kUPDATE = kFALSE;
+ Double_t xTPC = 250.0;
+ if(FollowProlongation(track)){
+ // Prolongate to TPC
+ if (PropagateToX(track, xTPC, fgkMaxStep)) { // -with update
+ seed->UpdateTrackParams(&track, AliESDtrack::kTRDrefit);
+ found++;
+ kUPDATE = kTRUE;
+ }
+ }
+
+ // Prolongate to TPC without update
+ if(!kUPDATE) {
+ AliTRDtrackV1 tt(*seed);
+ if (PropagateToX(tt, xTPC, fgkMaxStep)) seed->UpdateTrackParams(&tt, AliESDtrack::kTRDrefit);
+ }
+ }
+ AliInfo(Form("Number of loaded seeds: %d",nseed));
+ AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
+
+ return 0;
+}
+
+
+//____________________________________________________________________
+Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t)
+{
+ // Extrapolates the TRD track in the TPC direction.
+ //
+ // Parameters
+ // t : the TRD track which has to be extrapolated
+ //
+ // Output
+ // number of clusters attached to the track
+ //
+ // Detailed description
+ //
+ // Starting from current radial position of track <t> this function
+ // extrapolates the track through the 6 TRD layers. The following steps
+ // are being performed for each plane:
+ // 1. prepare track:
+ // a. get plane limits in the local x direction
+ // b. check crossing sectors
+ // c. check track inclination
+ // 2. search tracklet in the tracker list (see GetTracklet() for details)
+ // 3. evaluate material budget using the geo manager
+ // 4. propagate and update track using the tracklet information.
+ //
+ // Debug level 2
+ //
+
+ Int_t nClustersExpected = 0;
+ Int_t lastplane = 5; //GetLastPlane(&t);
+ for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
+ Int_t index = 0;
+ AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index);
+ if(!tracklet) continue;
+ if(!tracklet->IsOK()) AliWarning("tracklet not OK");
+
+ Double_t x = tracklet->GetX0();
+ // reject tracklets which are not considered for inward refit
+ if(x > t.GetX()+fgkMaxStep) continue;
+
+ // append tracklet to track
+ t.SetTracklet(tracklet, iplane, index);
+
+ if (x < (t.GetX()-fgkMaxStep) && !PropagateToX(t, x+fgkMaxStep, fgkMaxStep)) break;
+ if (!AdjustSector(&t)) break;
+
+ // Start global position
+ Double_t xyz0[3];
+ t.GetXYZ(xyz0);
+
+ // End global position
+ Double_t alpha = t.GetAlpha(), y, z;
+ if (!t.GetProlongation(x,y,z)) break;
+ Double_t xyz1[3];
+ xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha);
+ xyz1[1] = x * TMath::Sin(alpha) + y * TMath::Cos(alpha);
+ xyz1[2] = z;
+
+ // Get material budget
+ Double_t param[7];
+ AliTracker::MeanMaterialBudget(xyz0, xyz1, param);
+ Double_t xrho= param[0]*param[4];
+ Double_t xx0 = param[1]; // Get mean propagation parameters
+
+ // Propagate and update
+ t.PropagateTo(x, xx0, xrho);
+ if (!AdjustSector(&t)) break;
+
+ Double_t maxChi2 = t.GetPredictedChi2(tracklet);
+ if (maxChi2 < 1e+10 && t.Update(tracklet, maxChi2)){
+ nClustersExpected += tracklet->GetN();
+ }
+ }
+
+ if(AliTRDReconstructor::StreamLevel() > 1){
+ Int_t index;
+ for(int iplane=0; iplane<6; iplane++){
+ AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index);
+ if(!tracklet) continue;
+ t.SetTracklet(tracklet, iplane, index);
+ }
+
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ TTreeSRedirector &cstreamer = *fgDebugStreamer;
+ cstreamer << "FollowProlongation"
+ << "EventNumber=" << eventNumber
+ << "ncl=" << nClustersExpected
+ << "track.=" << &t
+ << "\n";
+ }
+
+ return nClustersExpected;
+
+}
+
+//_____________________________________________________________________________
+Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t)
+{
+ // Extrapolates the TRD track in the TOF direction.
+ //
+ // Parameters
+ // t : the TRD track which has to be extrapolated
+ //
+ // Output
+ // number of clusters attached to the track
+ //
+ // Detailed description
+ //
+ // Starting from current radial position of track <t> this function
+ // extrapolates the track through the 6 TRD layers. The following steps
+ // are being performed for each plane:
+ // 1. prepare track:
+ // a. get plane limits in the local x direction
+ // b. check crossing sectors
+ // c. check track inclination
+ // 2. build tracklet (see AliTRDseed::AttachClusters() for details)
+ // 3. evaluate material budget using the geo manager
+ // 4. propagate and update track using the tracklet information.
+ //
+ // Debug level 2
+ //
+
+ Int_t nClustersExpected = 0;
+ Double_t clength = AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick();
+ AliTRDtrackingChamber *chamber = 0x0;
+
+ // Loop through the TRD planes
+ for (Int_t iplane = 0; iplane < AliTRDgeometry::Nplan(); iplane++) {
+ // BUILD TRACKLET IF NOT ALREADY BUILT
+ Double_t x = 0., y, z, alpha;
+ AliTRDseedV1 tracklet(*t.GetTracklet(iplane));
+ if(!tracklet.IsOK()){
+ alpha = t.GetAlpha();
+ Int_t sector = Int_t(alpha/AliTRDgeometry::GetAlpha() + (alpha>0. ? 0 : AliTRDgeometry::kNsect));
+
+ if(!fTrSec[sector].GetNChambers()) continue;
+
+ if((x = fTrSec[sector].GetX(iplane)) < 1.) continue;
+
+ if (!t.GetProlongation(x, y, z)) break;
+ Int_t stack = fGeom->GetChamber(z, iplane);
+ Int_t nCandidates = stack >= 0 ? 1 : 2;
+ z -= stack >= 0 ? 0. : 4.;
+
+ for(int icham=0; icham<nCandidates; icham++, z+=8){
+ if((stack = fGeom->GetChamber(z, iplane)) < 0) continue;
+
+ if(!(chamber = fTrSec[sector].GetChamber(stack, iplane))) continue;
+
+ if(chamber->GetNClusters() < fgNTimeBins*AliTRDReconstructor::RecoParam()->GetFindableClusters()) continue;
+
+ x = chamber->GetX();
+
+ AliTRDpadPlane *pp = fGeom->GetPadPlane(iplane, stack);
+ tracklet.SetTilt(TMath::Tan(-TMath::DegToRad()*pp->GetTiltingAngle()));
+ tracklet.SetPadLength(pp->GetLengthIPad());
+ tracklet.SetPlane(iplane);
+ tracklet.SetX0(x);
+ if(!tracklet.Init(&t)){
+ t.SetStop(kTRUE);
+ return nClustersExpected;
+ }
+ if(!tracklet.AttachClustersIter(chamber, 1000.)) continue;
+ tracklet.Init(&t);
+
+ if(tracklet.GetN() < fgNTimeBins * AliTRDReconstructor::RecoParam()->GetFindableClusters()) continue;
+
+ break;
+ }
+ }
+ if(!tracklet.IsOK()){
+ if(x < 1.) continue; //temporary
+ if(!PropagateToX(t, x-fgkMaxStep, fgkMaxStep)) break;
+ if(!AdjustSector(&t)) break;
+ if(TMath::Abs(t.GetSnp()) > fgkMaxSnp) break;
+ continue;
+ }
+
+ // Propagate closer to the current chamber if neccessary
+ x -= clength;
+ if (x > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x-fgkMaxStep, fgkMaxStep)) break;
+ if (!AdjustSector(&t)) break;
+ if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) break;
+
+ // load tracklet to the tracker and the track
+ Int_t index = SetTracklet(&tracklet);
+ t.SetTracklet(&tracklet, iplane, index);
+
+
+ // Calculate the mean material budget along the path inside the chamber
+ //Calculate global entry and exit positions of the track in chamber (only track prolongation)
+ Double_t xyz0[3]; // entry point
+ t.GetXYZ(xyz0);
+ alpha = t.GetAlpha();
+ x = tracklet.GetX0();
+ if (!t.GetProlongation(x, y, z)) break;
+ Double_t xyz1[3]; // exit point
+ xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha);
+ xyz1[1] = +x * TMath::Sin(alpha) + y * TMath::Cos(alpha);
+ xyz1[2] = z;
+ Double_t param[7];
+ AliTracker::MeanMaterialBudget(xyz0, xyz1, param);
+ // The mean propagation parameters
+ Double_t xrho = param[0]*param[4]; // density*length
+ Double_t xx0 = param[1]; // radiation length
+
+ // Propagate and update track
+ t.PropagateTo(x, xx0, xrho);
+ if (!AdjustSector(&t)) break;
+ Double_t maxChi2 = t.GetPredictedChi2(&tracklet);
+ if (maxChi2<1e+10 && t.Update(&tracklet, maxChi2)){
+ nClustersExpected += tracklet.GetN();
+ t.SetTracklet(&tracklet, iplane, index);
+ UpdateTracklet(&tracklet, index);
+ }
+ // Reset material budget if 2 consecutive gold
+ if(iplane>0 && tracklet.GetN() + t.GetTracklet(iplane-1)->GetN() > 20) t.SetBudget(2, 0.);
+
+ // Make backup of the track until is gold
+ // TO DO update quality check of the track.
+ // consider comparison with fTimeBinsRange
+ Float_t ratio0 = tracklet.GetN() / Float_t(fgNTimeBins);
+ //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
+ //printf("tracklet.GetChi2() %f [< 18.0]\n", tracklet.GetChi2());
+ //printf("ratio0 %f [> 0.8]\n", ratio0);
+ //printf("ratio1 %f [> 0.6]\n", ratio1);
+ //printf("ratio0+ratio1 %f [> 1.5]\n", ratio0+ratio1);
+ //printf("t.GetNCross() %d [== 0]\n", t.GetNCross());
+ //printf("TMath::Abs(t.GetSnp()) %f [< 0.85]\n", TMath::Abs(t.GetSnp()));
+ //printf("t.GetNumberOfClusters() %d [> 20]\n", t.GetNumberOfClusters());
+
+ if (//(tracklet.GetChi2() < 18.0) && TO DO check with FindClusters and move it to AliTRDseed::Update
+ (ratio0 > 0.8) &&
+ //(ratio1 > 0.6) &&
+ //(ratio0+ratio1 > 1.5) &&
+ (t.GetNCross() == 0) &&
+ (TMath::Abs(t.GetSnp()) < 0.85) &&
+ (t.GetNumberOfClusters() > 20)) t.MakeBackupTrack();
+
+ } // end planes loop
+
+ if(AliTRDReconstructor::StreamLevel() > 1){
+ TTreeSRedirector &cstreamer = *fgDebugStreamer;
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ cstreamer << "FollowBackProlongation"
+ << "EventNumber=" << eventNumber
+ << "ncl=" << nClustersExpected
+ << "track.=" << &t
+ << "\n";
+ }
+
+ return nClustersExpected;
+}
+
+//_________________________________________________________________________
+Float_t AliTRDtrackerV1::FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *planes){
+ //
+ // Fits a Riemann-circle to the given points without tilting pad correction.
+ // The fit is performed using an instance of the class AliRieman (equations
+ // and transformations see documentation of this class)
+ // Afterwards all the tracklets are Updated
+ //
+ // Parameters: - Array of tracklets (AliTRDseedV1)
+ // - Storage for the chi2 values (beginning with direction z)
+ // - Seeding configuration
+ // Output: - The curvature
+ //
+ AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter();
+ fitter->Reset();
+ Int_t allplanes[] = {0, 1, 2, 3, 4, 5};
+ Int_t *ppl = &allplanes[0];
+ Int_t maxLayers = 6;
+ if(planes){
+ maxLayers = 4;
+ ppl = planes;
+ }
+ for(Int_t il = 0; il < maxLayers; il++){
+ if(!tracklets[ppl[il]].IsOK()) continue;
+ fitter->AddPoint(tracklets[ppl[il]].GetX0(), tracklets[ppl[il]].GetYfitR(0), tracklets[ppl[il]].GetZProb(),1,10);
+ }
+ fitter->Update();
+ // Set the reference position of the fit and calculate the chi2 values
+ memset(chi2, 0, sizeof(Double_t) * 2);
+ for(Int_t il = 0; il < maxLayers; il++){
+ // Reference positions
+ tracklets[ppl[il]].Init(fitter);
+
+ // chi2
+ if((!tracklets[ppl[il]].IsOK()) && (!planes)) continue;
+ chi2[0] += tracklets[ppl[il]].GetChi2Y();
+ chi2[1] += tracklets[ppl[il]].GetChi2Z();
+ }
+ return fitter->GetC();
+}
+
+//_________________________________________________________________________
+void AliTRDtrackerV1::FitRieman(AliTRDcluster **seedcl, Double_t chi2[2])
+{
+ //
+ // Performs a Riemann helix fit using the seedclusters as spacepoints
+ // Afterwards the chi2 values are calculated and the seeds are updated
+ //
+ // Parameters: - The four seedclusters
+ // - The tracklet array (AliTRDseedV1)
+ // - The seeding configuration
+ // - Chi2 array
+ //
+ // debug level 2
+ //
+ AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter();
+ fitter->Reset();
+ for(Int_t i = 0; i < 4; i++)
+ fitter->AddPoint(seedcl[i]->GetX(), seedcl[i]->GetY(), seedcl[i]->GetZ(), 1, 10);
+ fitter->Update();
+
+
+ // Update the seed and calculated the chi2 value
+ chi2[0] = 0; chi2[1] = 0;
+ for(Int_t ipl = 0; ipl < kNSeedPlanes; ipl++){
+ // chi2
+ chi2[0] += (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetZ() - fitter->GetZat(seedcl[ipl]->GetX()));
+ chi2[1] += (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX())) * (seedcl[ipl]->GetY() - fitter->GetYat(seedcl[ipl]->GetX()));
+ }
+}
+
+
+//_________________________________________________________________________
+Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Double_t zVertex)
+{
+ //
+ // Fits a helix to the clusters. Pad tilting is considered. As constraint it is
+ // assumed that the vertex position is set to 0.
+ // This method is very usefull for high-pt particles
+ // Basis for the fit: (x - x0)^2 + (y - y0)^2 - R^2 = 0
+ // x0, y0: Center of the circle
+ // Measured y-position: ymeas = y - tan(phiT)(zc - zt)
+ // zc: center of the pad row
+ // Equation which has to be fitted (after transformation):
+ // a + b * u + e * v + 2*(ymeas + tan(phiT)(z - zVertex))*t = 0
+ // Transformation:
+ // t = 1/(x^2 + y^2)
+ // u = 2 * x * t
+ // v = 2 * x * tan(phiT) * t
+ // Parameters in the equation:
+ // a = -1/y0, b = x0/y0, e = dz/dx
+ //
+ // The Curvature is calculated by the following equation:
+ // - curv = a/Sqrt(b^2 + 1) = 1/R
+ // Parameters: - the 6 tracklets
+ // - the Vertex constraint
+ // Output: - the Chi2 value of the track
+ //
+ // debug level 5
+ //
+
+ TLinearFitter *fitter = GetTiltedRiemanFitterConstraint();
+ fitter->StoreData(kTRUE);
+ fitter->ClearPoints();
+ AliTRDcluster *cl = 0x0;
+
+ Float_t x, y, z, w, t, error, tilt;
+ Double_t uvt[2];
+ Int_t nPoints = 0;
+ for(Int_t ipl = 0; ipl < AliTRDgeometry::kNplan; ipl++){
+ if(!tracklets[ipl].IsOK()) continue;
+ for(Int_t itb = 0; itb < fgNTimeBins; itb++){
+ if(!tracklets[ipl].IsUsable(itb)) continue;
+ cl = tracklets[ipl].GetClusters(itb);
+ x = cl->GetX();
+ y = cl->GetY();
+ z = cl->GetZ();
+ tilt = tracklets[ipl].GetTilt();
+ // Transformation
+ t = 1./(x * x + y * y);
+ uvt[0] = 2. * x * t;
+ uvt[1] = 2. * x * t * tilt ;
+ w = 2. * (y + tilt * (z - zVertex)) * t;
+ error = 2. * 0.2 * t;
+ fitter->AddPoint(uvt, w, error);
+ nPoints++;
+ }
+ }
+ fitter->Eval();
+
+ // Calculate curvature
+ Double_t a = fitter->GetParameter(0);
+ Double_t b = fitter->GetParameter(1);
+ Double_t curvature = a/TMath::Sqrt(b*b + 1);
+
+ Float_t chi2track = fitter->GetChisquare()/Double_t(nPoints);
+ for(Int_t ip = 0; ip < AliTRDtrackerV1::kNPlanes; ip++)
+ tracklets[ip].SetCC(curvature);
+
+ if(AliTRDReconstructor::StreamLevel() >= 5){
+ //Linear Model on z-direction
+ Double_t xref = CalculateReferenceX(tracklets); // Relative to the middle of the stack
+ Double_t slope = fitter->GetParameter(2);
+ Double_t zref = slope * xref;
+ Float_t chi2Z = CalculateChi2Z(tracklets, zref, slope, xref);
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
+ TTreeSRedirector &treeStreamer = *fgDebugStreamer;
+ treeStreamer << "FitTiltedRiemanConstraint"
+ << "EventNumber=" << eventNumber
+ << "CandidateNumber=" << candidateNumber
+ << "Curvature=" << curvature
+ << "Chi2Track=" << chi2track
+ << "Chi2Z=" << chi2Z
+ << "zref=" << zref
+ << "\n";
+ }
+ return chi2track;
+}
+
+//_________________________________________________________________________
+Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigError)
+{
+ //
+ // Performs a Riemann fit taking tilting pad correction into account
+ // The equation of a Riemann circle, where the y position is substituted by the
+ // measured y-position taking pad tilting into account, has to be transformed
+ // into a 4-dimensional hyperplane equation
+ // Riemann circle: (x-x0)^2 + (y-y0)^2 -R^2 = 0
+ // Measured y-Position: ymeas = y - tan(phiT)(zc - zt)
+ // zc: center of the pad row
+ // zt: z-position of the track
+ // The z-position of the track is assumed to be linear dependent on the x-position
+ // Transformed equation: a + b * u + c * t + d * v + e * w - 2 * (ymeas + tan(phiT) * zc) * t = 0
+ // Transformation: u = 2 * x * t
+ // v = 2 * tan(phiT) * t
+ // w = 2 * tan(phiT) * (x - xref) * t
+ // t = 1 / (x^2 + ymeas^2)
+ // Parameters: a = -1/y0
+ // b = x0/y0
+ // c = (R^2 -x0^2 - y0^2)/y0
+ // d = offset
+ // e = dz/dx
+ // If the offset respectively the slope in z-position is impossible, the parameters are fixed using
+ // results from the simple riemann fit. Afterwards the fit is redone.
+ // The curvature is calculated according to the formula:
+ // curv = a/(1 + b^2 + c*a) = 1/R
+ //
+ // Paramters: - Array of tracklets (connected to the track candidate)
+ // - Flag selecting the error definition
+ // Output: - Chi2 values of the track (in Parameter list)
+ //
+ TLinearFitter *fitter = GetTiltedRiemanFitter();
+ fitter->StoreData(kTRUE);
+ fitter->ClearPoints();
+ AliTRDLeastSquare zfitter;
+ AliTRDcluster *cl = 0x0;
+
+ Double_t xref = CalculateReferenceX(tracklets);
+ Double_t x, y, z, t, tilt, dx, w, we;
+ Double_t uvt[4];
+ Int_t nPoints = 0;
+ // Containers for Least-square fitter
+ for(Int_t ipl = 0; ipl < kNPlanes; ipl++){
+ if(!tracklets[ipl].IsOK()) continue;
+ for(Int_t itb = 0; itb < fgNTimeBins; itb++){
+ if(!(cl = tracklets[ipl].GetClusters(itb))) continue;
+ if (!tracklets[ipl].IsUsable(itb)) continue;
+ x = cl->GetX();
+ y = cl->GetY();
+ z = cl->GetZ();
+ tilt = tracklets[ipl].GetTilt();
+ dx = x - xref;
+ // Transformation
+ t = 1./(x*x + y*y);
+ uvt[0] = 2. * x * t;
+ uvt[1] = t;
+ uvt[2] = 2. * tilt * t;
+ uvt[3] = 2. * tilt * dx * t;
+ w = 2. * (y + tilt*z) * t;
+ // error definition changes for the different calls
+ we = 2. * t;
+ we *= sigError ? tracklets[ipl].GetSigmaY() : 0.2;
+ fitter->AddPoint(uvt, w, we);
+ zfitter.AddPoint(&x, z, static_cast<Double_t>(TMath::Sqrt(cl->GetSigmaZ2())));
+ nPoints++;
+ }
+ }
+ fitter->Eval();
+ zfitter.Eval();
+
+ Double_t offset = fitter->GetParameter(3);
+ Double_t slope = fitter->GetParameter(4);
+
+ // Linear fitter - not possible to make boundaries
+ // Do not accept non possible z and dzdx combinations
+ Bool_t acceptablez = kTRUE;
+ Double_t zref = 0.0;
+ for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) {
+ if(!tracklets[iLayer].IsOK()) continue;
+ zref = offset + slope * (tracklets[iLayer].GetX0() - xref);
+ if (TMath::Abs(tracklets[iLayer].GetZProb() - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0)
+ acceptablez = kFALSE;
+ }
+ if (!acceptablez) {
+ Double_t dzmf = zfitter.GetFunctionParameter(1);
+ Double_t zmf = zfitter.GetFunctionValue(&xref);
+ fgTiltedRieman->FixParameter(3, zmf);
+ fgTiltedRieman->FixParameter(4, dzmf);
+ fitter->Eval();
+ fitter->ReleaseParameter(3);
+ fitter->ReleaseParameter(4);
+ offset = fitter->GetParameter(3);
+ slope = fitter->GetParameter(4);
+ }
+
+ // Calculate Curvarture
+ Double_t a = fitter->GetParameter(0);
+ Double_t b = fitter->GetParameter(1);
+ Double_t c = fitter->GetParameter(2);
+ Double_t curvature = 1.0 + b*b - c*a;
+ if (curvature > 0.0)
+ curvature = a / TMath::Sqrt(curvature);
+
+ Double_t chi2track = fitter->GetChisquare()/Double_t(nPoints);
+
+ // Update the tracklets
+ Double_t dy, dz;
+ for(Int_t iLayer = 0; iLayer < AliTRDtrackerV1::kNPlanes; iLayer++) {
+
+ x = tracklets[iLayer].GetX0();
+ y = 0;
+ z = 0;
+ dy = 0;
+ dz = 0;
+
+ // y: R^2 = (x - x0)^2 + (y - y0)^2
+ // => y = y0 +/- Sqrt(R^2 - (x - x0)^2)
+ // R = Sqrt() = 1/Curvature
+ // => y = y0 +/- Sqrt(1/Curvature^2 - (x - x0)^2)
+ Double_t res = (x * a + b); // = (x - x0)/y0
+ res *= res;
+ res = 1.0 - c * a + b * b - res; // = (R^2 - (x - x0)^2)/y0^2
+ if (res >= 0) {
+ res = TMath::Sqrt(res);
+ y = (1.0 - res) / a;
+ }
+
+ // dy: R^2 = (x - x0)^2 + (y - y0)^2
+ // => y = +/- Sqrt(R^2 - (x - x0)^2) + y0
+ // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2)
+ // Curvature: cr = 1/R = a/Sqrt(1 + b^2 - c*a)
+ // => dy/dx = (x - x0)/(1/(cr^2) - (x - x0)^2)
+ Double_t x0 = -b / a;
+ if (-c * a + b * b + 1 > 0) {
+ if (1.0/(curvature * curvature) - (x - x0) * (x - x0) > 0.0) {
+ Double_t yderiv = (x - x0) / TMath::Sqrt(1.0/(curvature * curvature) - (x - x0) * (x - x0));
+ if (a < 0) yderiv *= -1.0;
+ dy = yderiv;
+ }
+ }
+ z = offset + slope * (x - xref);
+ dz = slope;
+ tracklets[iLayer].SetYref(0, y);
+ tracklets[iLayer].SetYref(1, dy);
+ tracklets[iLayer].SetZref(0, z);
+ tracklets[iLayer].SetZref(1, dz);
+ tracklets[iLayer].SetC(curvature);
+ tracklets[iLayer].SetChi2(chi2track);
+ }
+
+ if(AliTRDReconstructor::StreamLevel() >=5){
+ TTreeSRedirector &cstreamer = *fgDebugStreamer;
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
+ Double_t chi2z = CalculateChi2Z(tracklets, offset, slope, xref);
+ cstreamer << "FitTiltedRieman0"
+ << "EventNumber=" << eventNumber
+ << "CandidateNumber=" << candidateNumber
+ << "xref=" << xref
+ << "Chi2Z=" << chi2z
+ << "\n";
+ }
+ return chi2track;
+}
+
+//_________________________________________________________________________
+Float_t AliTRDtrackerV1::CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref)
+{
+ //
+ // Calculates the chi2-value of the track in z-Direction including tilting pad correction.
+ // A linear dependence on the x-value serves as a model.
+ // The parameters are related to the tilted Riemann fit.
+ // Parameters: - Array of tracklets (AliTRDseedV1) related to the track candidate
+ // - the offset for the reference x
+ // - the slope
+ // - the reference x position
+ // Output: - The Chi2 value of the track in z-Direction
+ //
+ Float_t chi2Z = 0, nLayers = 0;
+ for (Int_t iLayer = 0; iLayer < AliTRDgeometry::kNplan; iLayer++) {
+ if(!tracklets[iLayer].IsOK()) continue;
+ Double_t z = offset + slope * (tracklets[iLayer].GetX0() - xref);
+ chi2Z += TMath::Abs(tracklets[iLayer].GetMeanz() - z);
+ nLayers++;
+ }
+ chi2Z /= TMath::Max((nLayers - 3.0),1.0);
+ return chi2Z;
+}
+
+//_____________________________________________________________________________
+Int_t AliTRDtrackerV1::PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep)
+{
+ //
+ // Starting from current X-position of track <t> this function
+ // extrapolates the track up to radial position <xToGo>.
+ // Returns 1 if track reaches the plane, and 0 otherwise
+ //
+
+ const Double_t kEpsilon = 0.00001;
+
+ // Current track X-position
+ Double_t xpos = t.GetX();
+
+ // Direction: inward or outward
+ Double_t dir = (xpos < xToGo) ? 1.0 : -1.0;
+
+ while (((xToGo - xpos) * dir) > kEpsilon) {
+
+ Double_t xyz0[3];
+ Double_t xyz1[3];
+ Double_t param[7];
+ Double_t x;
+ Double_t y;
+ Double_t z;
+
+ // The next step size
+ Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
+
+ // Get the global position of the starting point
+ t.GetXYZ(xyz0);
+
+ // X-position after next step
+ x = xpos + step;
+
+ // Get local Y and Z at the X-position of the next step
+ if (!t.GetProlongation(x,y,z)) {
+ return 0; // No prolongation possible
+ }
+
+ // The global position of the end point of this prolongation step
+ xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
+ xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
+ xyz1[2] = z;
+
+ // Calculate the mean material budget between start and
+ // end point of this prolongation step
+ AliTracker::MeanMaterialBudget(xyz0, xyz1, param);
+
+ // Propagate the track to the X-position after the next step
+ if (!t.PropagateTo(x,param[1],param[0]*param[4])) {
+ return 0;
+ }
+
+ // Rotate the track if necessary
+ AdjustSector(&t);
+
+ // New track X-position
+ xpos = t.GetX();
+
+ }
+
+ return 1;
+
+}
+
+
+//_____________________________________________________________________________
+Int_t AliTRDtrackerV1::ReadClusters(TClonesArray* &array, TTree *clusterTree) const
+{
+ //
+ // Reads AliTRDclusters from the file.
+ // The names of the cluster tree and branches
+ // should match the ones used in AliTRDclusterizer::WriteClusters()
+ //
+
+ Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
+ TObjArray *clusterArray = new TObjArray(nsize+1000);
+
+ TBranch *branch = clusterTree->GetBranch("TRDcluster");
+ if (!branch) {
+ AliError("Can't get the branch !");
+ return 1;
+ }
+ branch->SetAddress(&clusterArray);
+
+ if(!fClusters){
+ array = new TClonesArray("AliTRDcluster", nsize);
+ array->SetOwner(kTRUE);
+ }
+
+ // Loop through all entries in the tree
+ Int_t nEntries = (Int_t) clusterTree->GetEntries();
+ Int_t nbytes = 0;
+ Int_t ncl = 0;
+ AliTRDcluster *c = 0x0;
+ for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
+ // Import the tree
+ nbytes += clusterTree->GetEvent(iEntry);
+
+ // Get the number of points in the detector
+ Int_t nCluster = clusterArray->GetEntriesFast();
+ for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
+ if(!(c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster))) continue;
+ c->SetInChamber();
+ new((*fClusters)[ncl++]) AliTRDcluster(*c);
+ delete (clusterArray->RemoveAt(iCluster));
+ }
+
+ }
+ delete clusterArray;
+
+ return 0;
+}
+
+//_____________________________________________________________________________
+Int_t AliTRDtrackerV1::LoadClusters(TTree *cTree)
+{
+ //
+ // Fills clusters into TRD tracking_sectors
+ // Note that the numbering scheme for the TRD tracking_sectors
+ // differs from that of TRD sectors
+ //
+
+
+ if (ReadClusters(fClusters, cTree)) {
+ AliError("Problem with reading the clusters !");
+ return 1;
+ }
+ Int_t ncl = fClusters->GetEntriesFast(), nin = 0;
+ if(!ncl){
+ AliInfo("Clusters 0");
+ return 1;
+ }
+
+ Int_t icl = ncl;
+ while (icl--) {
+ AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(icl);
+ if(c->IsInChamber()) nin++;
+ Int_t detector = c->GetDetector();
+ Int_t sector = fGeom->GetSector(detector);
+ Int_t stack = fGeom->GetChamber(detector);
+ Int_t plane = fGeom->GetPlane(detector);
+
+ fTrSec[sector].GetChamber(stack, plane, kTRUE)->InsertCluster(c, icl);
+ }
+ AliInfo(Form("Clusters %d in %6.2f %%", ncl, 100.*float(nin)/ncl));
+
+ for(int isector =0; isector<AliTRDgeometry::kNsect; isector++){
+ if(!fTrSec[isector].GetNChambers()) continue;
+ fTrSec[isector].Init();
+ }
+
+ return 0;
+}
+
+
+//____________________________________________________________________
+void AliTRDtrackerV1::UnloadClusters()
{
- //
- // Destructor
- //
+ //
+ // Clears the arrays of clusters and tracks. Resets sectors and timebins
+ //
+
+ if(fTracks) fTracks->Delete();
+ if(fTracklets) fTracklets->Delete();
+ if(fClusters) fClusters->Delete();
+
+ for (int i = 0; i < AliTRDgeometry::kNsect; i++) fTrSec[i].Clear();
+
+ // Increment the Event Number
+ AliTRDtrackerDebug::SetEventNumber(AliTRDtrackerDebug::GetEventNumber() + 1);
+}
+
+//_____________________________________________________________________________
+Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *track)
+{
+ //
+ // Rotates the track when necessary
+ //
+
+ Double_t alpha = AliTRDgeometry::GetAlpha();
+ Double_t y = track->GetY();
+ Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
+
+ if (y > ymax) {
+ if (!track->Rotate( alpha)) {
+ return kFALSE;
+ }
+ }
+ else if (y < -ymax) {
+ if (!track->Rotate(-alpha)) {
+ return kFALSE;
+ }
+ }
+
+ return kTRUE;
+
+}
- if(fDebugStreamerV1) delete fDebugStreamerV1;
- if(fFitter) delete fFitter;
- if(fRecoParam) delete fRecoParam;
+//____________________________________________________________________
+AliTRDseedV1* AliTRDtrackerV1::GetTracklet(AliTRDtrackV1 *track, Int_t p, Int_t &idx)
+{
+ // Find tracklet for TRD track <track>
+ // Parameters
+ // - track
+ // - sector
+ // - plane
+ // - index
+ // Output
+ // tracklet
+ // index
+ // Detailed description
+ //
+ idx = track->GetTrackletIndex(p);
+ AliTRDseedV1 *tracklet = idx<0 ? 0x0 : (AliTRDseedV1*)fTracklets->UncheckedAt(idx);
+
+ return tracklet;
}
//____________________________________________________________________
-Int_t AliTRDtrackerV1::Clusters2Tracks(AliESDEvent *esd)
+Int_t AliTRDtrackerV1::SetTracklet(AliTRDseedV1 *tracklet)
{
- //
- // Steering stand alone tracking for full TRD detector
- //
- // Parameters :
- // esd : The ESD event. On output it contains
- // the ESD tracks found in TRD.
- //
- // Output :
- // Number of tracks found in the TRD detector.
- //
- // Detailed description
- // 1. Launch individual SM trackers.
- // See AliTRDtrackerV1::Clusters2TracksSM() for details.
- //
-
- if(!fRecoParam){
- AliError("Reconstruction configuration not initialized. Call first AliTRDtrackerV1::SetRecoParam().");
- return 0;
+ // Add this tracklet to the list of tracklets stored in the tracker
+ //
+ // Parameters
+ // - tracklet : pointer to the tracklet to be added to the list
+ //
+ // Output
+ // - the index of the new tracklet in the tracker tracklets list
+ //
+ // Detailed description
+ // Build the tracklets list if it is not yet created (late initialization)
+ // and adds the new tracklet to the list.
+ //
+ if(!fTracklets){
+ fTracklets = new TClonesArray("AliTRDseedV1", AliTRDgeometry::Nsect()*kMaxTracksStack);
+ fTracklets->SetOwner(kTRUE);
}
+ Int_t nentries = fTracklets->GetEntriesFast();
+ new ((*fTracklets)[nentries]) AliTRDseedV1(*tracklet);
+ return nentries;
+}
+
+//____________________________________________________________________
+Bool_t AliTRDtrackerV1::UpdateTracklet(AliTRDseedV1 *tracklet, Int_t index){
+ //
+ // Update Tracklet in the tracklet container
+ //
+ // Parameters:
+ // - the tracklet information
+ // - the index of the tracklet which has to be updated
+ //
+ // Output:
+ // - True if successfull
+ // - false if the container doesn't exist or the index is out of range
+ //
+ if(!fTracklets || index >= fTracklets->GetEntriesFast()) return kFALSE;
- //AliInfo("Start Track Finder ...");
- Int_t ntracks = 0;
- for(int ism=0; ism<AliTRDtracker::kTrackingSectors; ism++){
- //AliInfo(Form("Processing supermodule %i ...", ism));
- ntracks += Clusters2TracksSM(fTrSec[ism], esd);
- }
- AliInfo(Form("Found %d TRD tracks.", ntracks));
- return ntracks;
+ new((*fTracklets)[index]) AliTRDseedV1(*tracklet);
+ return kTRUE;
}
//____________________________________________________________________
-Int_t AliTRDtrackerV1::Clusters2TracksSM(AliTRDtracker::AliTRDtrackingSector *sector
- , AliESDEvent *esd)
+Int_t AliTRDtrackerV1::Clusters2TracksSM(Int_t sector, AliESDEvent *esd)
{
- //
- // Steer tracking for one SM.
- //
- // Parameters :
- // sector : Array of (SM) propagation layers containing clusters
- // esd : The current ESD event. On output it contains the also
- // the ESD (TRD) tracks found in this SM.
- //
- // Output :
- // Number of tracks found in this TRD supermodule.
- //
- // Detailed description
- //
- // 1. Unpack AliTRDpropagationLayers objects for each stack.
- // 2. Launch stack tracking.
- // See AliTRDtrackerV1::Clusters2TracksStack() for details.
- // 3. Pack results in the ESD event.
- //
-
- AliTRDpadPlane *pp = 0x0;
+ //
+ // Steer tracking for one SM.
+ //
+ // Parameters :
+ // sector : Array of (SM) propagation layers containing clusters
+ // esd : The current ESD event. On output it contains the also
+ // the ESD (TRD) tracks found in this SM.
+ //
+ // Output :
+ // Number of tracks found in this TRD supermodule.
+ //
+ // Detailed description
+ //
+ // 1. Unpack AliTRDpropagationLayers objects for each stack.
+ // 2. Launch stack tracking.
+ // See AliTRDtrackerV1::Clusters2TracksStack() for details.
+ // 3. Pack results in the ESD event.
+ //
// allocate space for esd tracks in this SM
TClonesArray esdTrackList("AliESDtrack", 2*kMaxTracksStack);
esdTrackList.SetOwner();
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
- const Int_t kFindable = Int_t(fRecoParam->GetFindableClusters()*6.*nTimeBins);
- Int_t ntracks = 0;
- Int_t nClStack = 0;
- for(int istack = 0; istack<AliTRDpropagationLayer::kZones; istack++){
- AliTRDstackLayer stackLayer[kNPlanes*kNTimeBins];
-
- nClStack = 0;
- //AliInfo(Form("Processing stack %i ...",istack));
- //AliInfo("Building stack propagation layers ...");
- for(int ilayer=0; ilayer<kNPlanes*nTimeBins; ilayer++){
- pp = fGeom->GetPadPlane((Int_t)(ilayer/nTimeBins), istack);
- Double_t stacklength = (pp->GetNrows() - 2) * pp->GetLengthIPad()
- + 2 * pp->GetLengthOPad() + 2 * pp->GetLengthRim();
- //Debug
- Double_t z0 = fGeom->GetRow0((Int_t)(ilayer/nTimeBins),istack,0);
- const AliTRDpropagationLayer kSMlayer(*(sector->GetLayer(ilayer)));
- stackLayer[ilayer] = kSMlayer;
-#ifdef DEBUG
- stackLayer[ilayer].SetDebugStream(fDebugStreamerV1);
-#endif
- stackLayer[ilayer].SetRange(z0 - stacklength, stacklength);
- stackLayer[ilayer].SetSector(sector->GetSector());
- stackLayer[ilayer].SetStackNr(istack);
- stackLayer[ilayer].SetNRows(pp->GetNrows());
- stackLayer[ilayer].SetRecoParam(fRecoParam);
- stackLayer[ilayer].BuildIndices();
- nClStack += stackLayer[ilayer].GetNClusters();
+ Int_t nTracks = 0;
+ Int_t nChambers = 0;
+ AliTRDtrackingChamber **stack = 0x0, *chamber = 0x0;
+ for(int istack = 0; istack<AliTRDgeometry::kNcham; istack++){
+ if(!(stack = fTrSec[sector].GetStack(istack))) continue;
+ nChambers = 0;
+ for(int iplane=0; iplane<AliTRDgeometry::kNplan; iplane++){
+ if(!(chamber = stack[iplane])) continue;
+ if(chamber->GetNClusters() < fgNTimeBins * AliTRDReconstructor::RecoParam()->GetFindableClusters()) continue;
+ nChambers++;
+ //AliInfo(Form("sector %d stack %d plane %d clusters %d", sector, istack, iplane, chamber->GetNClusters()));
}
- //AliInfo(Form("Finish building stack propagation layers. nClusters %d.", nClStack));
- if(nClStack < kFindable) continue;
- ntracks += Clusters2TracksStack(&stackLayer[0], &esdTrackList);
+ if(nChambers < 4) continue;
+ //AliInfo(Form("Doing stack %d", istack));
+ nTracks += Clusters2TracksStack(stack, &esdTrackList);
}
- //AliInfo(Form("Found %d tracks in SM", ntracks));
+ //AliInfo(Form("Found %d tracks in SM %d [%d]\n", nTracks, sector, esd->GetNumberOfTracks()));
- for(int itrack=0; itrack<ntracks; itrack++)
- esd->AddTrack((AliESDtrack*)esdTrackList[itrack]);
+ for(int itrack=0; itrack<nTracks; itrack++)
+ esd->AddTrack((AliESDtrack*)esdTrackList[itrack]);
- return ntracks;
+ // Reset Track and Candidate Number
+ AliTRDtrackerDebug::SetCandidateNumber(0);
+ AliTRDtrackerDebug::SetTrackNumber(0);
+ return nTracks;
}
//____________________________________________________________________
-Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDstackLayer *layer
- , TClonesArray *esdTrackList)
+Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray *esdTrackList)
{
- //
- // Make tracks in one TRD stack.
- //
- // Parameters :
- // layer : Array of stack propagation layers containing clusters
- // esdTrackList : Array of ESD tracks found by the stand alone tracker.
- // On exit the tracks found in this stack are appended.
- //
- // Output :
- // Number of tracks found in this stack.
- //
- // Detailed description
- //
- // 1. Find the 3 most useful seeding chambers. See BuildSeedingConfigs() for details.
- // 2. Steer AliTRDtrackerV1::MakeSeeds() for 3 seeding layer configurations.
- // See AliTRDtrackerV1::MakeSeeds() for more details.
- // 3. Arrange track candidates in decreasing order of their quality
- // 4. Classify tracks in 5 categories according to:
- // a) number of layers crossed
- // b) track quality
- // 5. Sign clusters by tracks in decreasing order of track quality
- // 6. Build AliTRDtrack out of seeding tracklets
- // 7. Cook MC label
- // 8. Build ESD track and register it to the output list
- //
-
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
+ //
+ // Make tracks in one TRD stack.
+ //
+ // Parameters :
+ // layer : Array of stack propagation layers containing clusters
+ // esdTrackList : Array of ESD tracks found by the stand alone tracker.
+ // On exit the tracks found in this stack are appended.
+ //
+ // Output :
+ // Number of tracks found in this stack.
+ //
+ // Detailed description
+ //
+ // 1. Find the 3 most useful seeding chambers. See BuildSeedingConfigs() for details.
+ // 2. Steer AliTRDtrackerV1::MakeSeeds() for 3 seeding layer configurations.
+ // See AliTRDtrackerV1::MakeSeeds() for more details.
+ // 3. Arrange track candidates in decreasing order of their quality
+ // 4. Classify tracks in 5 categories according to:
+ // a) number of layers crossed
+ // b) track quality
+ // 5. Sign clusters by tracks in decreasing order of track quality
+ // 6. Build AliTRDtrack out of seeding tracklets
+ // 7. Cook MC label
+ // 8. Build ESD track and register it to the output list
+ //
+
+ AliTRDtrackingChamber *chamber = 0x0;
AliTRDseedV1 sseed[kMaxTracksStack*6]; // to be initialized
- Int_t pars[3]; // MakeSeeds parameters
+ Int_t pars[4]; // MakeSeeds parameters
//Double_t alpha = AliTRDgeometry::GetAlpha();
//Double_t shift = .5 * alpha;
Int_t configs[kNConfigs];
// Build initial seeding configurations
- Double_t quality = BuildSeedingConfigs(layer, configs);
-#ifdef DEBUG
- if(AliTRDReconstructor::StreamLevel() > 1)
- AliInfo(Form("Plane config %d %d %d Quality %f"
- , configs[0], configs[1], configs[2], quality));
-#endif
-
+ Double_t quality = BuildSeedingConfigs(stack, configs);
+ if(AliTRDReconstructor::StreamLevel() > 1){
+ AliInfo(Form("Plane config %d %d %d Quality %f"
+ , configs[0], configs[1], configs[2], quality));
+ }
+
// Initialize contors
Int_t ntracks, // number of TRD track candidates
- ntracks1, // number of registered TRD tracks/iter
- ntracks2 = 0; // number of all registered TRD tracks in stack
+ ntracks1, // number of registered TRD tracks/iter
+ ntracks2 = 0; // number of all registered TRD tracks in stack
fSieveSeeding = 0;
do{
// Loop over seeding configurations
ntracks = 0; ntracks1 = 0;
for (Int_t iconf = 0; iconf<3; iconf++) {
pars[0] = configs[iconf];
- pars[1] = layer->GetStackNr();
- pars[2] = ntracks;
- ntracks = MakeSeeds(layer, &sseed[6*ntracks], pars);
+ pars[1] = ntracks;
+ ntracks = MakeSeeds(stack, &sseed[6*ntracks], pars);
if(ntracks == kMaxTracksStack) break;
}
-#ifdef DEBUG
- if(AliTRDReconstructor::StreamLevel() > 1)
- AliInfo(Form("Candidate TRD tracks %d in stack %d.", ntracks, pars[1]));
-#endif
+ if(AliTRDReconstructor::StreamLevel() > 1) AliInfo(Form("Candidate TRD tracks %d in iteration %d.", ntracks, fSieveSeeding));
+
if(!ntracks) break;
// Sort the seeds according to their quality
// Sieve clusters in decreasing order of track quality
Double_t trackParams[7];
-// AliTRDseedV1 *lseed = 0x0;
+ // AliTRDseedV1 *lseed = 0x0;
Int_t jSieve = 0, candidates;
do{
//AliInfo(Form("\t\tITER = %i ", jSieve));
// Check track candidates
candidates = 0;
for (Int_t itrack = 0; itrack < ntracks; itrack++) {
- Int_t trackIndex = sort[itrack];
- if (signedTrack[trackIndex] || fakeTrack[trackIndex]) continue;
+ Int_t trackIndex = sort[itrack];
+ if (signedTrack[trackIndex] || fakeTrack[trackIndex]) continue;
- // Calculate track parameters from tracklets seeds
- Int_t labelsall[1000];
- Int_t nlabelsall = 0;
- Int_t naccepted = 0;
- Int_t ncl = 0;
- Int_t nused = 0;
- Int_t nlayers = 0;
- Int_t findable = 0;
- for (Int_t jLayer = 0; jLayer < kNPlanes; jLayer++) {
- Int_t jseed = kNPlanes*trackIndex+jLayer;
- if (TMath::Abs(sseed[jseed].GetYref(0) / sseed[jseed].GetX0()) < 0.15)
- findable++;
-
- if(!sseed[jseed].IsOK()) continue;
- sseed[jseed].UpdateUsed();
- ncl += sseed[jseed].GetN2();
- nused += sseed[jseed].GetNUsed();
- nlayers++;
-
- // Cooking label
- for (Int_t itime = 0; itime < nTimeBins; itime++) {
- if(!sseed[jseed].IsUsable(itime)) continue;
- naccepted++;
- Int_t tindex = 0, ilab = 0;
- while(ilab<3 && (tindex = sseed[jseed].GetClusters(itime)->GetLabel(ilab)) >= 0){
- labelsall[nlabelsall++] = tindex;
- ilab++;
- }
- }
- }
- // Filter duplicated tracks
- if (nused > 30){
- //printf("Skip nused %d\n", nused);
- fakeTrack[trackIndex] = kTRUE;
- continue;
- }
- if (Float_t(nused)/ncl >= .25){
- //printf("Skip nused/ncl >= .25\n");
- fakeTrack[trackIndex] = kTRUE;
- continue;
- }
+ // Calculate track parameters from tracklets seeds
+ Int_t labelsall[1000];
+ Int_t nlabelsall = 0;
+ Int_t naccepted = 0;
+ Int_t ncl = 0;
+ Int_t nused = 0;
+ Int_t nlayers = 0;
+ Int_t findable = 0;
+ for (Int_t jLayer = 0; jLayer < kNPlanes; jLayer++) {
+ Int_t jseed = kNPlanes*trackIndex+jLayer;
+ if(!sseed[jseed].IsOK()) continue;
+ if (TMath::Abs(sseed[jseed].GetYref(0) / sseed[jseed].GetX0()) < 0.15) findable++;
+
+ sseed[jseed].UpdateUsed();
+ ncl += sseed[jseed].GetN2();
+ nused += sseed[jseed].GetNUsed();
+ nlayers++;
+
+ // Cooking label
+ for (Int_t itime = 0; itime < fgNTimeBins; itime++) {
+ if(!sseed[jseed].IsUsable(itime)) continue;
+ naccepted++;
+ Int_t tindex = 0, ilab = 0;
+ while(ilab<3 && (tindex = sseed[jseed].GetClusters(itime)->GetLabel(ilab)) >= 0){
+ labelsall[nlabelsall++] = tindex;
+ ilab++;
+ }
+ }
+ }
+ // Filter duplicated tracks
+ if (nused > 30){
+ //printf("Skip %d nused %d\n", trackIndex, nused);
+ fakeTrack[trackIndex] = kTRUE;
+ continue;
+ }
+ if (Float_t(nused)/ncl >= .25){
+ //printf("Skip %d nused/ncl >= .25\n", trackIndex);
+ fakeTrack[trackIndex] = kTRUE;
+ continue;
+ }
- // Classify tracks
- Bool_t skip = kFALSE;
- switch(jSieve){
- case 0:
- if(nlayers < 6) {skip = kTRUE; break;}
- if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;}
- break;
-
- case 1:
- if(nlayers < findable){skip = kTRUE; break;}
- if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -4.){skip = kTRUE; break;}
- break;
-
- case 2:
- if ((nlayers == findable) || (nlayers == 6)) { skip = kTRUE; break;}
- if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -6.0){skip = kTRUE; break;}
- break;
-
- case 3:
- if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;}
- break;
-
- case 4:
- if (nlayers == 3){skip = kTRUE; break;}
- if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) - nused/(nlayers-3.0) < -15.0){skip = kTRUE; break;}
- break;
- }
- if(skip){
- candidates++;
- //printf("REJECTED : %d [%d] nlayers %d trackQuality = %e nused %d\n", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused);
- continue;
- }
- signedTrack[trackIndex] = kTRUE;
+ // Classify tracks
+ Bool_t skip = kFALSE;
+ switch(jSieve){
+ case 0:
+ if(nlayers < 6) {skip = kTRUE; break;}
+ if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;}
+ break;
+
+ case 1:
+ if(nlayers < findable){skip = kTRUE; break;}
+ if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -4.){skip = kTRUE; break;}
+ break;
+
+ case 2:
+ if ((nlayers == findable) || (nlayers == 6)) { skip = kTRUE; break;}
+ if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -6.0){skip = kTRUE; break;}
+ break;
+
+ case 3:
+ if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;}
+ break;
+
+ case 4:
+ if (nlayers == 3){skip = kTRUE; break;}
+ //if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) - nused/(nlayers-3.0) < -15.0){skip = kTRUE; break;}
+ break;
+ }
+ if(skip){
+ candidates++;
+ //printf("REJECTED : %d [%d] nlayers %d trackQuality = %e nused %d\n", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused);
+ continue;
+ }
+ signedTrack[trackIndex] = kTRUE;
- // Build track label - what happens if measured data ???
- Int_t labels[1000];
- Int_t outlab[1000];
- Int_t nlab = 0;
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- Int_t jseed = kNPlanes*trackIndex+iLayer;
- if(!sseed[jseed].IsOK()) continue;
- for(int ilab=0; ilab<2; ilab++){
- if(sseed[jseed].GetLabels(ilab) < 0) continue;
- labels[nlab] = sseed[jseed].GetLabels(ilab);
- nlab++;
- }
- }
- Freq(nlab,labels,outlab,kFALSE);
- Int_t label = outlab[0];
- Int_t frequency = outlab[1];
- Freq(nlabelsall,labelsall,outlab,kFALSE);
- Int_t label1 = outlab[0];
- Int_t label2 = outlab[2];
- Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
+ // Build track label - what happens if measured data ???
+ Int_t labels[1000];
+ Int_t outlab[1000];
+ Int_t nlab = 0;
+ for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
+ Int_t jseed = kNPlanes*trackIndex+iLayer;
+ if(!sseed[jseed].IsOK()) continue;
+ for(int ilab=0; ilab<2; ilab++){
+ if(sseed[jseed].GetLabels(ilab) < 0) continue;
+ labels[nlab] = sseed[jseed].GetLabels(ilab);
+ nlab++;
+ }
+ }
+ Freq(nlab,labels,outlab,kFALSE);
+ Int_t label = outlab[0];
+ Int_t frequency = outlab[1];
+ Freq(nlabelsall,labelsall,outlab,kFALSE);
+ Int_t label1 = outlab[0];
+ Int_t label2 = outlab[2];
+ Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
- // Sign clusters
- AliTRDcluster *cl = 0x0; Int_t clusterIndex = -1;
- for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
- Int_t jseed = kNPlanes*trackIndex+jLayer;
- if(!sseed[jseed].IsOK()) continue;
- if(TMath::Abs(sseed[jseed].GetYfit(1) - sseed[jseed].GetYfit(1)) >= .2) continue; // check this condition with Marian
- sseed[jseed].UseClusters();
- if(!cl){
- Int_t ic = 0;
- while(!(cl = sseed[jseed].GetClusters(ic))) ic++;
- clusterIndex = sseed[jseed].GetIndexes(ic);
- }
- }
- if(!cl) continue;
+ // Sign clusters
+ AliTRDcluster *cl = 0x0; Int_t clusterIndex = -1;
+ for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
+ Int_t jseed = kNPlanes*trackIndex+jLayer;
+ if(!sseed[jseed].IsOK()) continue;
+ if(TMath::Abs(sseed[jseed].GetYfit(1) - sseed[jseed].GetYfit(1)) >= .2) continue; // check this condition with Marian
+ sseed[jseed].UseClusters();
+ if(!cl){
+ Int_t ic = 0;
+ while(!(cl = sseed[jseed].GetClusters(ic))) ic++;
+ clusterIndex = sseed[jseed].GetIndexes(ic);
+ }
+ }
+ if(!cl) continue;
- // Build track parameters
- AliTRDseedV1 *lseed =&sseed[trackIndex*6];
- Int_t idx = 0;
- while(idx<3 && !lseed->IsOK()) {
- idx++;
- lseed++;
- }
- Double_t cR = lseed->GetC();
- trackParams[1] = lseed->GetYref(0);
- trackParams[2] = lseed->GetZref(0);
- trackParams[3] = lseed->GetX0() * cR - TMath::Sin(TMath::ATan(lseed->GetYref(1)));
- trackParams[4] = lseed->GetZref(1) / TMath::Sqrt(1. + lseed->GetYref(1) * lseed->GetYref(1));
- trackParams[5] = cR;
- trackParams[0] = lseed->GetX0();
- trackParams[6] = layer[0].GetSector();/* *alpha+shift; // Supermodule*/
-
-#ifdef DEBUG
- if(AliTRDReconstructor::StreamLevel() > 1) printf("Track %d [%d] nlayers %d trackQuality = %e nused %d, yref = %3.3f\n", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused, trackParams[1]);
-
- if(AliTRDReconstructor::StreamLevel() >= 1){
- Int_t sector = layer[0].GetSector();
- Int_t nclusters = 0;
- AliTRDseedV1 *dseed[6];
- for(int is=0; is<6; is++){
- dseed[is] = new AliTRDseedV1(sseed[trackIndex*6+is], kTRUE);
- nclusters += sseed[is].GetN2();
- //for(int ic=0; ic<30; ic++) if(sseed[trackIndex*6+is].GetClusters(ic)) printf("l[%d] tb[%d] cptr[%p]\n", is, ic, sseed[trackIndex*6+is].GetClusters(ic));
- }
- //Int_t eventNrInFile = esd->GetEventNumberInFile();
- //AliInfo(Form("Number of clusters %d.", nclusters));
- TTreeSRedirector &cstreamer = *fDebugStreamerV1;
- cstreamer << "Clusters2TracksStack"
- << "Iter=" << fSieveSeeding
- << "Like=" << fTrackQuality[trackIndex]
- << "S0.=" << dseed[0]
- << "S1.=" << dseed[1]
- << "S2.=" << dseed[2]
- << "S3.=" << dseed[3]
- << "S4.=" << dseed[4]
- << "S5.=" << dseed[5]
- << "p0=" << trackParams[0]
- << "p1=" << trackParams[1]
- << "p2=" << trackParams[2]
- << "p3=" << trackParams[3]
- << "p4=" << trackParams[4]
- << "p5=" << trackParams[5]
- << "p6=" << trackParams[6]
- << "Sector=" << sector
- << "Stack=" << pars[1]
- << "Label=" << label
- << "Label1=" << label1
- << "Label2=" << label2
- << "FakeRatio=" << fakeratio
- << "Freq=" << frequency
- << "Ncl=" << ncl
- << "NLayers=" << nlayers
- << "Findable=" << findable
- << "NUsed=" << nused
- << "\n";
- //???for(int is=0; is<6; is++) delete dseed[is];
- }
-#endif
+ // Build track parameters
+ AliTRDseedV1 *lseed =&sseed[trackIndex*6];
+ Int_t idx = 0;
+ while(idx<3 && !lseed->IsOK()) {
+ idx++;
+ lseed++;
+ }
+ Double_t cR = lseed->GetC();
+ trackParams[1] = lseed->GetYref(0);
+ trackParams[2] = lseed->GetZref(0);
+ trackParams[3] = lseed->GetX0() * cR - TMath::Sin(TMath::ATan(lseed->GetYref(1)));
+ trackParams[4] = lseed->GetZref(1) / TMath::Sqrt(1. + lseed->GetYref(1) * lseed->GetYref(1));
+ trackParams[5] = cR;
+ trackParams[0] = lseed->GetX0();
+ Int_t ich = 0; while(!(chamber = stack[ich])) ich++;
+ trackParams[6] = fGeom->GetSector(chamber->GetDetector());/* *alpha+shift; // Supermodule*/
+
+ if(AliTRDReconstructor::StreamLevel() > 1){
+ AliInfo(Form("Track %d [%d] nlayers %d trackQuality = %e nused %d, yref = %3.3f", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused, trackParams[1]));
+
+ Int_t nclusters = 0;
+ AliTRDseedV1 *dseed[6];
+ for(int is=0; is<6; is++){
+ dseed[is] = new AliTRDseedV1(sseed[trackIndex*6+is]);
+ dseed[is]->SetOwner();
+ nclusters += sseed[is].GetN2();
+ }
+ //Int_t eventNrInFile = esd->GetEventNumberInFile();
+ //AliInfo(Form("Number of clusters %d.", nclusters));
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ Int_t trackNumber = AliTRDtrackerDebug::GetTrackNumber();
+ Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
+ TTreeSRedirector &cstreamer = *fgDebugStreamer;
+ cstreamer << "Clusters2TracksStack"
+ << "EventNumber=" << eventNumber
+ << "TrackNumber=" << trackNumber
+ << "CandidateNumber=" << candidateNumber
+ << "Iter=" << fSieveSeeding
+ << "Like=" << fTrackQuality[trackIndex]
+ << "S0.=" << dseed[0]
+ << "S1.=" << dseed[1]
+ << "S2.=" << dseed[2]
+ << "S3.=" << dseed[3]
+ << "S4.=" << dseed[4]
+ << "S5.=" << dseed[5]
+ << "p0=" << trackParams[0]
+ << "p1=" << trackParams[1]
+ << "p2=" << trackParams[2]
+ << "p3=" << trackParams[3]
+ << "p4=" << trackParams[4]
+ << "p5=" << trackParams[5]
+ << "p6=" << trackParams[6]
+ << "Label=" << label
+ << "Label1=" << label1
+ << "Label2=" << label2
+ << "FakeRatio=" << fakeratio
+ << "Freq=" << frequency
+ << "Ncl=" << ncl
+ << "NLayers=" << nlayers
+ << "Findable=" << findable
+
+ << "NUsed=" << nused
+ << "\n";
+ }
- AliTRDtrack *track = AliTRDtrackerV1::RegisterSeed(&sseed[trackIndex*kNPlanes], trackParams);
- if(!track){
- AliWarning("Fail to build a TRD Track.");
- continue;
- }
- AliESDtrack esdTrack;
- esdTrack.UpdateTrackParams(track, AliESDtrack::kTRDout);
- esdTrack.SetLabel(track->GetLabel());
- new ((*esdTrackList)[ntracks0++]) AliESDtrack(esdTrack);
- ntracks1++;
+ AliTRDtrackV1 *track = MakeTrack(&sseed[trackIndex*kNPlanes], trackParams);
+ if(!track){
+ //AliWarning("Fail to build a TRD Track.");
+ continue;
+ }
+ //AliInfo("End of MakeTrack()");
+ AliESDtrack esdTrack;
+ esdTrack.UpdateTrackParams(track, AliESDtrack::kTRDout);
+ esdTrack.SetLabel(track->GetLabel());
+ track->UpdateESDtrack(&esdTrack);
+ // write ESD-friends if neccessary
+ if (AliTRDReconstructor::StreamLevel() > 0){
+ //printf("Creating Calibrations Object\n");
+ AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(*track);
+ calibTrack->SetOwner();
+ esdTrack.AddCalibObject(calibTrack);
+ }
+ new ((*esdTrackList)[ntracks0++]) AliESDtrack(esdTrack);
+ ntracks1++;
+ AliTRDtrackerDebug::SetTrackNumber(AliTRDtrackerDebug::GetTrackNumber() + 1);
}
jSieve++;
fSieveSeeding++;
// Rebuild plane configurations and indices taking only unused clusters into account
- quality = BuildSeedingConfigs(layer, configs);
- //if(quality < fRecoParam->GetPlaneQualityThreshold()) break;
+ quality = BuildSeedingConfigs(stack, configs);
+ if(quality < 1.E-7) break; //AliTRDReconstructor::RecoParam()->GetPlaneQualityThreshold()) break;
- for(Int_t il = 0; il < kNPlanes * nTimeBins; il++) layer[il].BuildIndices(fSieveSeeding);
+ for(Int_t ip = 0; ip < kNPlanes; ip++){
+ if(!(chamber = stack[ip])) continue;
+ chamber->Build(fGeom);//Indices(fSieveSeeding);
+ }
-#ifdef DEBUG
- if(AliTRDReconstructor::StreamLevel() > 1) AliInfo(Form("Sieve level %d Plane config %d %d %d Quality %f", fSieveSeeding, configs[0], configs[1], configs[2], quality));
-#endif
+ if(AliTRDReconstructor::StreamLevel() > 1){
+ AliInfo(Form("Sieve level %d Plane config %d %d %d Quality %f", fSieveSeeding, configs[0], configs[1], configs[2], quality));
+ }
} while(fSieveSeeding<10); // end stack clusters sieve
}
//___________________________________________________________________
-Double_t AliTRDtrackerV1::BuildSeedingConfigs(AliTRDstackLayer *layers
- , Int_t *configs)
+Double_t AliTRDtrackerV1::BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int_t *configs)
{
- //
- // Assign probabilities to chambers according to their
- // capability of producing seeds.
- //
- // Parameters :
- //
- // layers : Array of stack propagation layers for all 6 chambers in one stack
- // configs : On exit array of configuration indexes (see GetSeedingConfig()
- // for details) in the decreasing order of their seeding probabilities.
- //
- // Output :
- //
- // Return top configuration quality
- //
- // Detailed description:
- //
- // To each chamber seeding configuration (see GetSeedingConfig() for
- // the list of all configurations) one defines 2 quality factors:
- // - an apriori topological quality (see GetSeedingConfig() for details) and
- // - a data quality based on the uniformity of the distribution of
- // clusters over the x range (time bins population). See CookChamberQA() for details.
- // The overall chamber quality is given by the product of this 2 contributions.
- //
-
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
-
- Double_t chamberQA[kNPlanes];
+ //
+ // Assign probabilities to chambers according to their
+ // capability of producing seeds.
+ //
+ // Parameters :
+ //
+ // layers : Array of stack propagation layers for all 6 chambers in one stack
+ // configs : On exit array of configuration indexes (see GetSeedingConfig()
+ // for details) in the decreasing order of their seeding probabilities.
+ //
+ // Output :
+ //
+ // Return top configuration quality
+ //
+ // Detailed description:
+ //
+ // To each chamber seeding configuration (see GetSeedingConfig() for
+ // the list of all configurations) one defines 2 quality factors:
+ // - an apriori topological quality (see GetSeedingConfig() for details) and
+ // - a data quality based on the uniformity of the distribution of
+ // clusters over the x range (time bins population). See CookChamberQA() for details.
+ // The overall chamber quality is given by the product of this 2 contributions.
+ //
+
+ Double_t chamberQ[kNPlanes];
+ AliTRDtrackingChamber *chamber = 0x0;
for(int iplane=0; iplane<kNPlanes; iplane++){
- chamberQA[iplane] = CookPlaneQA(&layers[iplane*nTimeBins]);
- //printf("chamberQA[%d] = %f\n", iplane, chamberQA[iplane]);
+ if(!(chamber = stack[iplane])) continue;
+ chamberQ[iplane] = (chamber = stack[iplane]) ? chamber->GetQuality() : 0.;
}
Double_t tconfig[kNConfigs];
for(int iconf=0; iconf<kNConfigs; iconf++){
GetSeedingConfig(iconf, planes);
tconfig[iconf] = fgTopologicQA[iconf];
- for(int iplane=0; iplane<4; iplane++) tconfig[iconf] *= chamberQA[planes[iplane]];
+ for(int iplane=0; iplane<4; iplane++) tconfig[iconf] *= chamberQ[planes[iplane]];
}
- TMath::Sort(kNConfigs, tconfig, configs, kTRUE);
+ TMath::Sort((Int_t)kNConfigs, tconfig, configs, kTRUE);
+ // AliInfo(Form("q[%d] = %f", configs[0], tconfig[configs[0]]));
+ // AliInfo(Form("q[%d] = %f", configs[1], tconfig[configs[1]]));
+ // AliInfo(Form("q[%d] = %f", configs[2], tconfig[configs[2]]));
+
return tconfig[configs[0]];
}
//____________________________________________________________________
-Int_t AliTRDtrackerV1::MakeSeeds(AliTRDstackLayer *layers
- , AliTRDseedV1 *sseed
- , Int_t *ipar)
+Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *sseed, Int_t *ipar)
{
- //
- // Make tracklet seeds in the TRD stack.
- //
- // Parameters :
- // layers : Array of stack propagation layers containing clusters
- // sseed : Array of empty tracklet seeds. On exit they are filled.
- // ipar : Control parameters:
- // ipar[0] -> seeding chambers configuration
- // ipar[1] -> stack index
- // ipar[2] -> number of track candidates found so far
- //
- // Output :
- // Number of tracks candidates found.
- //
- // Detailed description
- //
- // The following steps are performed:
- // 1. Select seeding layers from seeding chambers
- // 2. Select seeding clusters from the seeding AliTRDpropagationLayerStack.
- // The clusters are taken from layer 3, layer 0, layer 1 and layer 2, in
- // this order. The parameters controling the range of accepted clusters in
- // layer 0, 1, and 2 are defined in AliTRDstackLayer::BuildCond().
- // 3. Helix fit of the cluster set. (see AliTRDtrackerFitter::FitRieman(AliTRDcluster**))
- // 4. Initialize seeding tracklets in the seeding chambers.
- // 5. Filter 0.
- // Chi2 in the Y direction less than threshold ... (1./(3. - sLayer))
- // Chi2 in the Z direction less than threshold ... (1./(3. - sLayer))
- // 6. Attach clusters to seeding tracklets and find linear approximation of
- // the tracklet (see AliTRDseedV1::AttachClustersIter()). The number of used
- // clusters used by current seeds should not exceed ... (25).
- // 7. Filter 1.
- // All 4 seeding tracklets should be correctly constructed (see
- // AliTRDseedV1::AttachClustersIter())
- // 8. Helix fit of the seeding tracklets
- // 9. Filter 2.
- // Likelihood calculation of the fit. (See AliTRDtrackerV1::CookLikelihood() for details)
- // 10. Extrapolation of the helix fit to the other 2 chambers:
- // a) Initialization of extrapolation tracklet with fit parameters
- // b) Helix fit of tracklets
- // c) Attach clusters and linear interpolation to extrapolated tracklets
- // d) Helix fit of tracklets
- // 11. Improve seeding tracklets quality by reassigning clusters.
- // See AliTRDtrackerV1::ImproveSeedQuality() for details.
- // 12. Helix fit of all 6 seeding tracklets and chi2 calculation
- // 13. Hyperplane fit and track quality calculation. See AliTRDtrackerFitter::FitHyperplane() for details.
- // 14. Cooking labels for tracklets. Should be done only for MC
- // 15. Register seeds.
- //
-
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
+ //
+ // Make tracklet seeds in the TRD stack.
+ //
+ // Parameters :
+ // layers : Array of stack propagation layers containing clusters
+ // sseed : Array of empty tracklet seeds. On exit they are filled.
+ // ipar : Control parameters:
+ // ipar[0] -> seeding chambers configuration
+ // ipar[1] -> stack index
+ // ipar[2] -> number of track candidates found so far
+ //
+ // Output :
+ // Number of tracks candidates found.
+ //
+ // Detailed description
+ //
+ // The following steps are performed:
+ // 1. Select seeding layers from seeding chambers
+ // 2. Select seeding clusters from the seeding AliTRDpropagationLayerStack.
+ // The clusters are taken from layer 3, layer 0, layer 1 and layer 2, in
+ // this order. The parameters controling the range of accepted clusters in
+ // layer 0, 1, and 2 are defined in AliTRDchamberTimeBin::BuildCond().
+ // 3. Helix fit of the cluster set. (see AliTRDtrackerFitter::FitRieman(AliTRDcluster**))
+ // 4. Initialize seeding tracklets in the seeding chambers.
+ // 5. Filter 0.
+ // Chi2 in the Y direction less than threshold ... (1./(3. - sLayer))
+ // Chi2 in the Z direction less than threshold ... (1./(3. - sLayer))
+ // 6. Attach clusters to seeding tracklets and find linear approximation of
+ // the tracklet (see AliTRDseedV1::AttachClustersIter()). The number of used
+ // clusters used by current seeds should not exceed ... (25).
+ // 7. Filter 1.
+ // All 4 seeding tracklets should be correctly constructed (see
+ // AliTRDseedV1::AttachClustersIter())
+ // 8. Helix fit of the seeding tracklets
+ // 9. Filter 2.
+ // Likelihood calculation of the fit. (See AliTRDtrackerV1::CookLikelihood() for details)
+ // 10. Extrapolation of the helix fit to the other 2 chambers:
+ // a) Initialization of extrapolation tracklet with fit parameters
+ // b) Helix fit of tracklets
+ // c) Attach clusters and linear interpolation to extrapolated tracklets
+ // d) Helix fit of tracklets
+ // 11. Improve seeding tracklets quality by reassigning clusters.
+ // See AliTRDtrackerV1::ImproveSeedQuality() for details.
+ // 12. Helix fit of all 6 seeding tracklets and chi2 calculation
+ // 13. Hyperplane fit and track quality calculation. See AliTRDtrackerFitter::FitHyperplane() for details.
+ // 14. Cooking labels for tracklets. Should be done only for MC
+ // 15. Register seeds.
+ //
+
+ AliTRDtrackingChamber *chamber = 0x0;
AliTRDcluster *c[4] = {0x0, 0x0, 0x0, 0x0}; // initilize seeding clusters
AliTRDseedV1 *cseed = &sseed[0]; // initialize tracklets for first track
Int_t ncl, mcl; // working variable for looping over clusters
- Int_t index[AliTRDstackLayer::kMaxClustersLayer], jndex[AliTRDstackLayer::kMaxClustersLayer];
+ Int_t index[AliTRDchamberTimeBin::kMaxClustersLayer], jndex[AliTRDchamberTimeBin::kMaxClustersLayer];
// chi2 storage
// chi2[0] = tracklet chi2 on the Z direction
// chi2[1] = tracklet chi2 on the R direction
// unpack control parameters
Int_t config = ipar[0];
- Int_t istack = ipar[1];
- Int_t ntracks = ipar[2];
+ Int_t ntracks = ipar[1];
Int_t planes[kNSeedPlanes]; GetSeedingConfig(config, planes);
-#ifdef DEBUG
- if(AliTRDReconstructor::StreamLevel() > 1) AliInfo(Form("Making seeds Stack[%d] Config[%d] Tracks[%d]...", istack, config, ntracks));
-#endif
// Init chambers geometry
+ Int_t ic = 0; while(!(chamber = stack[ic])) ic++;
+ Int_t istack = fGeom->GetChamber(chamber->GetDetector());
Double_t hL[kNPlanes]; // Tilting angle
Float_t padlength[kNPlanes]; // pad lenghts
- AliTRDpadPlane *pp;
- for(int il=0; il<kNPlanes; il++){
- pp = fGeom->GetPadPlane(il, istack); // istack has to be imported
- hL[il] = TMath::Tan(-TMath::DegToRad()*pp->GetTiltingAngle());
- padlength[il] = 10.; //pp->GetLengthIPad();
+ AliTRDpadPlane *pp = 0x0;
+ for(int iplane=0; iplane<kNPlanes; iplane++){
+ pp = fGeom->GetPadPlane(iplane, istack);
+ hL[iplane] = TMath::Tan(-TMath::DegToRad()*pp->GetTiltingAngle());
+ padlength[iplane] = pp->GetLengthIPad();
+ }
+
+ if(AliTRDReconstructor::StreamLevel() > 1){
+ AliInfo(Form("Making seeds Stack[%d] Config[%d] Tracks[%d]...", istack, config, ntracks));
}
- Double_t cond0[4], cond1[4], cond2[4];
- // make seeding layers (to be moved in Clusters2TracksStack)
- AliTRDstackLayer *layer[] = {0x0, 0x0, 0x0, 0x0};
- for(int isl=0; isl<kNSeedPlanes; isl++) layer[isl] = MakeSeedingLayer(&layers[planes[isl] * nTimeBins], planes[isl]);
-
-
+ Int_t nlayers = 0;
+ AliTRDchamberTimeBin *layer[] = {0x0, 0x0, 0x0, 0x0};
+ for(int isl=0; isl<kNSeedPlanes; isl++){
+ if(!(chamber = stack[planes[isl]])) continue;
+ if(!(layer[isl] = chamber->GetSeedingLayer(fGeom))) continue;
+ nlayers++;
+ //AliInfo(Form("seeding plane %d clusters %d", planes[isl], Int_t(*layer[isl])));
+ }
+ if(nlayers < 4) return 0;
+
+
// Start finding seeds
+ Double_t cond0[4], cond1[4], cond2[4];
Int_t icl = 0;
while((c[3] = (*layer[3])[icl++])){
if(!c[3]) continue;
layer[0]->BuildCond(c[3], cond0, 0);
layer[0]->GetClusters(cond0, index, ncl);
+ //printf("Found c[3] candidates 0 %d\n", ncl);
Int_t jcl = 0;
while(jcl<ncl) {
c[0] = (*layer[0])[index[jcl++]];
Double_t phi = (c[3]->GetY() - c[0]->GetY())/dx;
layer[1]->BuildCond(c[0], cond1, 1, theta, phi);
layer[1]->GetClusters(cond1, jndex, mcl);
+ //printf("Found c[0] candidates 1 %d\n", mcl);
Int_t kcl = 0;
while(kcl<mcl) {
- c[1] = (*layer[1])[jndex[kcl++]];
- if(!c[1]) continue;
- layer[2]->BuildCond(c[1], cond2, 2, theta, phi);
- c[2] = layer[2]->GetNearestCluster(cond2);
- if(!c[2]) continue;
+ c[1] = (*layer[1])[jndex[kcl++]];
+ if(!c[1]) continue;
+ layer[2]->BuildCond(c[1], cond2, 2, theta, phi);
+ c[2] = layer[2]->GetNearestCluster(cond2);
+ //printf("Found c[1] candidate 2 %p\n", c[2]);
+ if(!c[2]) continue;
- //AliInfo("Seeding clusters found. Building seeds ...");
- //for(Int_t i = 0; i < kNSeedPlanes; i++) printf("%i. coordinates: x = %3.3f, y = %3.3f, z = %3.3f\n", i, c[i]->GetX(), c[i]->GetY(), c[i]->GetZ());
- for (Int_t il = 0; il < 6; il++) cseed[il].Reset();
-
- fFitter->Reset();
-
- fFitter->FitRieman(c, kNSeedPlanes);
-
- chi2[0] = 0.; chi2[1] = 0.;
- AliTRDseedV1 *tseed = 0x0;
- for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){
- tseed = &cseed[planes[iLayer]];
- tseed->SetRecoParam(fRecoParam);
- tseed->SetLayer(planes[iLayer]);
- tseed->SetTilt(hL[planes[iLayer]]);
- tseed->SetPadLength(TMath::Sqrt(c[iLayer]->GetSigmaZ2()*12));
- tseed->SetX0(layer[iLayer]->GetX());
-
- tseed->Update(fFitter->GetRiemanFitter());
- chi2[0] += tseed->GetChi2Z(c[iLayer]->GetZ());
- chi2[1] += tseed->GetChi2Y(c[iLayer]->GetY());
- }
-
- Bool_t isFake = kFALSE;
- if (c[0]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE;
- if (c[1]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE;
- if (c[2]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE;
-#ifdef DEBUG
- if(AliTRDReconstructor::StreamLevel() >= 2){
- Float_t yref[4], ycluster[4];
- for(int il=0; il<4; il++){
- tseed = &cseed[planes[il]];
- yref[il] = tseed->GetYref(0);
- ycluster[il] = c[il]->GetY();
- }
- Float_t threshold = .5;//1./(3. - sLayer);
- Int_t ll = c[3]->GetLabel(0);
- TTreeSRedirector &cs0 = *fDebugStreamerV1;
- cs0 << "MakeSeeds0"
- <<"isFake=" << isFake
- <<"label=" << ll
- <<"threshold=" << threshold
- <<"chi2=" << chi2[1]
- <<"yref0="<<yref[0]
- <<"yref1="<<yref[1]
- <<"yref2="<<yref[2]
- <<"yref3="<<yref[3]
- <<"ycluster0="<<ycluster[0]
- <<"ycluster1="<<ycluster[1]
- <<"ycluster2="<<ycluster[2]
- <<"ycluster3="<<ycluster[3]
- <<"\n";
- }
-#endif
-
- if(chi2[0] > fRecoParam->GetChi2Z()/*7./(3. - sLayer)*//*iter*/){
- //AliInfo(Form("Failed chi2 filter on chi2Z [%f].", chi2[0]));
- continue;
- }
- if(chi2[1] > fRecoParam->GetChi2Y()/*1./(3. - sLayer)*//*iter*/){
- //AliInfo(Form("Failed chi2 filter on chi2Y [%f].", chi2[1]));
- continue;
- }
- //AliInfo("Passed chi2 filter.");
-
-#ifdef DEBUG
- if(AliTRDReconstructor::StreamLevel() >= 2){
- Float_t minmax[2] = { -100.0, 100.0 };
- for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
- Float_t max = c[iLayer]->GetZ() + cseed[planes[iLayer]].GetPadLength() * 0.5 + 1.0 - cseed[planes[iLayer]].GetZref(0);
- if (max < minmax[1]) minmax[1] = max;
- Float_t min = c[iLayer]->GetZ()-cseed[planes[iLayer]].GetPadLength() * 0.5 - 1.0 - cseed[planes[iLayer]].GetZref(0);
- if (min > minmax[0]) minmax[0] = min;
- }
- Double_t xpos[4];
- for(Int_t l = 0; l < kNSeedPlanes; l++) xpos[l] = layer[l]->GetX();
- TTreeSRedirector &cstreamer = *fDebugStreamerV1;
- cstreamer << "MakeSeeds1"
- << "isFake=" << isFake
- << "config=" << config
- << "Cl0.=" << c[0]
- << "Cl1.=" << c[1]
- << "Cl2.=" << c[2]
- << "Cl3.=" << c[3]
- << "X0=" << xpos[0] //layer[sLayer]->GetX()
- << "X1=" << xpos[1] //layer[sLayer + 1]->GetX()
- << "X2=" << xpos[2] //layer[sLayer + 2]->GetX()
- << "X3=" << xpos[3] //layer[sLayer + 3]->GetX()
- << "Y2exp=" << cond2[0]
- << "Z2exp=" << cond2[1]
- << "Chi2R=" << chi2[0]
- << "Chi2Z=" << chi2[1]
- << "Seed0.=" << &cseed[planes[0]]
- << "Seed1.=" << &cseed[planes[1]]
- << "Seed2.=" << &cseed[planes[2]]
- << "Seed3.=" << &cseed[planes[3]]
- << "Zmin=" << minmax[0]
- << "Zmax=" << minmax[1]
- << "\n" ;
- }
-#endif
- // try attaching clusters to tracklets
- Int_t nUsedCl = 0;
- Int_t nlayers = 0;
- for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){
- AliTRDseedV1 tseed = cseed[planes[iLayer]];
- if(!tseed.AttachClustersIter(&layers[planes[iLayer]*nTimeBins], 5., kFALSE, c[iLayer])) continue;
- cseed[planes[iLayer]] = tseed;
- nUsedCl += cseed[planes[iLayer]].GetNUsed();
- if(nUsedCl > 25) break;
- nlayers++;
- }
- if(nlayers < kNSeedPlanes){
- //AliInfo("Failed updating all seeds.");
- continue;
- }
- // fit tracklets and cook likelihood
- chi2[0] = 0.; chi2[1] = 0.;
- fFitter->FitRieman(&cseed[0], &planes[0]);
- AliRieman *rim = fFitter->GetRiemanFitter();
- for(int iLayer=0; iLayer<4; iLayer++){
- cseed[planes[iLayer]].Update(rim);
- chi2[0] += (Float_t)cseed[planes[iLayer]].GetChi2Z();
- chi2[1] += cseed[planes[iLayer]].GetChi2Y();
- }
- Double_t chi2r = chi2[1], chi2z = chi2[0];
- Double_t like = CookLikelihood(&cseed[0], planes, chi2); // to be checked
- if (TMath::Log(1.E-9 + like) < fRecoParam->GetTrackLikelihood()){
- //AliInfo(Form("Failed likelihood %f[%e].", TMath::Log(1.E-9 + like), like));
- continue;
- }
- //AliInfo(Form("Passed likelihood %f[%e].", TMath::Log(1.E-9 + like), like));
-
+ // AliInfo("Seeding clusters found. Building seeds ...");
+ // for(Int_t i = 0; i < kNSeedPlanes; i++) printf("%i. coordinates: x = %6.3f, y = %6.3f, z = %6.3f\n", i, c[i]->GetX(), c[i]->GetY(), c[i]->GetZ());
+
+ for (Int_t il = 0; il < 6; il++) cseed[il].Reset();
+
+ FitRieman(c, chi2);
+
+ AliTRDseedV1 *tseed = 0x0;
+ for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){
+ Int_t jLayer = planes[iLayer];
+ tseed = &cseed[jLayer];
+ tseed->SetPlane(jLayer);
+ tseed->SetTilt(hL[jLayer]);
+ tseed->SetPadLength(padlength[jLayer]);
+ tseed->SetX0(stack[jLayer]->GetX());
+ tseed->Init(GetRiemanFitter());
+ }
- // book preliminary results
- seedQuality[ntracks] = like;
- fSeedLayer[ntracks] = config;/*sLayer;*/
+ Bool_t isFake = kFALSE;
+ if(AliTRDReconstructor::StreamLevel() >= 2){
+ if (c[0]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE;
+ if (c[1]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE;
+ if (c[2]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE;
+
+ Double_t xpos[4];
+ for(Int_t l = 0; l < kNSeedPlanes; l++) xpos[l] = layer[l]->GetX();
+ Float_t yref[4];
+ for(int il=0; il<4; il++) yref[il] = cseed[planes[il]].GetYref(0);
+ Int_t ll = c[3]->GetLabel(0);
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
+ AliRieman *rim = GetRiemanFitter();
+ TTreeSRedirector &cs0 = *fgDebugStreamer;
+ cs0 << "MakeSeeds0"
+ <<"EventNumber=" << eventNumber
+ <<"CandidateNumber=" << candidateNumber
+ <<"isFake=" << isFake
+ <<"config=" << config
+ <<"label=" << ll
+ <<"chi2z=" << chi2[0]
+ <<"chi2y=" << chi2[1]
+ <<"Y2exp=" << cond2[0]
+ <<"Z2exp=" << cond2[1]
+ <<"X0=" << xpos[0] //layer[sLayer]->GetX()
+ <<"X1=" << xpos[1] //layer[sLayer + 1]->GetX()
+ <<"X2=" << xpos[2] //layer[sLayer + 2]->GetX()
+ <<"X3=" << xpos[3] //layer[sLayer + 3]->GetX()
+ <<"yref0=" << yref[0]
+ <<"yref1=" << yref[1]
+ <<"yref2=" << yref[2]
+ <<"yref3=" << yref[3]
+ <<"c0.=" << c[0]
+ <<"c1.=" << c[1]
+ <<"c2.=" << c[2]
+ <<"c3.=" << c[3]
+ <<"Seed0.=" << &cseed[planes[0]]
+ <<"Seed1.=" << &cseed[planes[1]]
+ <<"Seed2.=" << &cseed[planes[2]]
+ <<"Seed3.=" << &cseed[planes[3]]
+ <<"RiemanFitter.=" << rim
+ <<"\n";
+ }
- // attach clusters to the extrapolation seeds
- Int_t lextrap[2];
- GetExtrapolationConfig(config, lextrap);
- Int_t nusedf = 0; // debug value
- for(int iLayer=0; iLayer<2; iLayer++){
- Int_t jLayer = lextrap[iLayer];
-
- // prepare extrapolated seed
- cseed[jLayer].Reset();
- cseed[jLayer].SetRecoParam(fRecoParam);
- cseed[jLayer].SetLayer(jLayer);
- cseed[jLayer].SetTilt(hL[jLayer]);
- cseed[jLayer].SetX0(layers[jLayer * nTimeBins + (nTimeBins/2)].GetX()); // ????????
- //cseed[jLayer].SetPadLength(??????????);
- cseed[jLayer].Update(rim);
-
- AliTRDcluster *cd = FindSeedingCluster(&layers[jLayer*nTimeBins], &cseed[jLayer]);
- if(cd == 0x0) continue;
-// if(!cd) continue;
- cseed[jLayer].SetPadLength(TMath::Sqrt(cd->GetSigmaZ2() * 12.));
- cseed[jLayer].SetX0(cd->GetX()); // reference defined by a seedingLayer which is defined by the x-coordinate of the layers inside
-
- // fit extrapolated seed
- AliTRDseedV1::FitRiemanTilt(cseed, kTRUE);
- if ((jLayer == 0) && !(cseed[1].IsOK())) continue;
- if ((jLayer == 5) && !(cseed[4].IsOK())) continue;
- AliTRDseedV1 tseed = cseed[jLayer];
- if(!tseed.AttachClustersIter(&layers[jLayer*nTimeBins], 1000.)) continue;
- cseed[jLayer] = tseed;
- nusedf += cseed[jLayer].GetNUsed(); // debug value
- AliTRDseedV1::FitRiemanTilt(cseed, kTRUE);
- }
- //AliInfo("Extrapolation done.");
-
- ImproveSeedQuality(layers, cseed);
- //AliInfo("Improve seed quality done.");
-
- nlayers = 0;
- Int_t nclusters = 0;
- Int_t findable = 0;
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- if (TMath::Abs(cseed[iLayer].GetYref(0) / cseed[iLayer].GetX0()) < 0.15) findable++;
- if (!cseed[iLayer].IsOK()) continue;
- nclusters += cseed[iLayer].GetN2();
- nlayers++;
- }
- if (nlayers < 3){
- //AliInfo("Failed quality check on seeds.");
- continue;
- }
+ if(chi2[0] > AliTRDReconstructor::RecoParam()->GetChi2Z()/*7./(3. - sLayer)*//*iter*/){
+ //AliInfo(Form("Failed chi2 filter on chi2Z [%f].", chi2[0]));
+ AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
+ continue;
+ }
+ if(chi2[1] > AliTRDReconstructor::RecoParam()->GetChi2Y()/*1./(3. - sLayer)*//*iter*/){
+ //AliInfo(Form("Failed chi2 filter on chi2Y [%f].", chi2[1]));
+ AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
+ continue;
+ }
+ //AliInfo("Passed chi2 filter.");
+
+ // try attaching clusters to tracklets
+ Int_t nUsedCl = 0;
+ Int_t nlayers = 0;
+ for(int iLayer=0; iLayer<kNSeedPlanes; iLayer++){
+ Int_t jLayer = planes[iLayer];
+ if(!cseed[jLayer].AttachClustersIter(stack[jLayer], 5., kFALSE, c[iLayer])) continue;
+ nUsedCl += cseed[jLayer].GetNUsed();
+ if(nUsedCl > 25) break;
+ nlayers++;
+ }
+ if(nlayers < kNSeedPlanes){
+ //AliInfo(Form("Failed updating all seeds %d [%d].", nlayers, kNSeedPlanes));
+ AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
+ continue;
+ }
+ // fit tracklets and cook likelihood
+ FitTiltedRieman(&cseed[0], kTRUE);// Update Seeds and calculate Likelihood
+ chi2[0] = GetChi2Y(&cseed[0]);
+ chi2[1] = GetChi2Z(&cseed[0]);
+ //Chi2 definitions in testing stage
+ //chi2[0] = GetChi2YTest(&cseed[0]);
+ //chi2[1] = GetChi2ZTest(&cseed[0]);
+ Double_t like = CookLikelihood(&cseed[0], planes, chi2); // to be checked
+
+ if (TMath::Log(1.E-9 + like) < AliTRDReconstructor::RecoParam()->GetTrackLikelihood()){
+ //AliInfo(Form("Failed likelihood %f[%e].", TMath::Log(1.E-9 + like), like));
+ AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
+ continue;
+ }
+ //AliInfo(Form("Passed likelihood %f[%e].", TMath::Log(1.E-9 + like), like));
+
+ // book preliminary results
+ seedQuality[ntracks] = like;
+ fSeedLayer[ntracks] = config;/*sLayer;*/
+
+ // attach clusters to the extrapolation seeds
+ Int_t lextrap[2];
+ GetExtrapolationConfig(config, lextrap);
+ Int_t nusedf = 0; // debug value
+ for(int iLayer=0; iLayer<2; iLayer++){
+ Int_t jLayer = lextrap[iLayer];
+ if(!(chamber = stack[jLayer])) continue;
+
+ // prepare extrapolated seed
+ cseed[jLayer].Reset();
+ cseed[jLayer].SetPlane(jLayer);
+ cseed[jLayer].SetTilt(hL[jLayer]);
+ cseed[jLayer].SetX0(chamber->GetX());
+ cseed[jLayer].SetPadLength(padlength[jLayer]);
+
+ // fit extrapolated seed
+ if ((jLayer == 0) && !(cseed[1].IsOK())) continue;
+ if ((jLayer == 5) && !(cseed[4].IsOK())) continue;
+ AliTRDseedV1 tseed = cseed[jLayer];
+ if(!tseed.AttachClustersIter(chamber, 1000.)) continue;
+ cseed[jLayer] = tseed;
+ nusedf += cseed[jLayer].GetNUsed(); // debug value
+ FitTiltedRieman(cseed, kTRUE);
+ }
- // fit full track and cook likelihoods
- fFitter->FitRieman(&cseed[0]);
- Double_t chi2ZF = 0., chi2RF = 0.;
- for(int ilayer=0; ilayer<6; ilayer++){
- cseed[ilayer].Update(fFitter->GetRiemanFitter());
- if (!cseed[ilayer].IsOK()) continue;
- //tchi2 = cseed[ilayer].GetChi2Z();
- //printf("layer %d chi2 %e\n", ilayer, tchi2);
- chi2ZF += cseed[ilayer].GetChi2Z();
- chi2RF += cseed[ilayer].GetChi2Y();
- }
- chi2ZF /= TMath::Max((nlayers - 3.), 1.);
- chi2RF /= TMath::Max((nlayers - 3.), 1.);
-
- // do the final track fitting
- fFitter->SetLayers(nlayers);
-#ifdef DEBUG
- fFitter->SetDebugStream(fDebugStreamerV1);
-#endif
- fTrackQuality[ntracks] = fFitter->FitHyperplane(&cseed[0], chi2ZF, GetZ());
- Double_t param[3];
- Double_t chi2[2];
- fFitter->GetHyperplaneFitResults(param);
- fFitter->GetHyperplaneFitChi2(chi2);
- //AliInfo("Hyperplane fit done\n");
-
- // finalize tracklets
- Int_t labels[12];
- Int_t outlab[24];
- Int_t nlab = 0;
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- if (!cseed[iLayer].IsOK()) continue;
-
- if (cseed[iLayer].GetLabels(0) >= 0) {
- labels[nlab] = cseed[iLayer].GetLabels(0);
- nlab++;
- }
+ // AliInfo("Extrapolation done.");
+ // Debug Stream containing all the 6 tracklets
+ if(AliTRDReconstructor::StreamLevel() >= 2){
+ TTreeSRedirector &cstreamer = *fgDebugStreamer;
+ TLinearFitter *tiltedRieman = GetTiltedRiemanFitter();
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
+ cstreamer << "MakeSeeds1"
+ << "EventNumber=" << eventNumber
+ << "CandidateNumber=" << candidateNumber
+ << "S0.=" << &cseed[0]
+ << "S1.=" << &cseed[1]
+ << "S2.=" << &cseed[2]
+ << "S3.=" << &cseed[3]
+ << "S4.=" << &cseed[4]
+ << "S5.=" << &cseed[5]
+ << "FitterT.=" << tiltedRieman
+ << "\n";
+ }
+
+ if(ImproveSeedQuality(stack, cseed) < 4){
+ AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
+ continue;
+ }
+ //AliInfo("Improve seed quality done.");
+
+ // fit full track and cook likelihoods
+ // Double_t curv = FitRieman(&cseed[0], chi2);
+ // Double_t chi2ZF = chi2[0] / TMath::Max((nlayers - 3.), 1.);
+ // Double_t chi2RF = chi2[1] / TMath::Max((nlayers - 3.), 1.);
+
+ // do the final track fitting (Once with vertex constraint and once without vertex constraint)
+ Double_t chi2Vals[3];
+ chi2Vals[0] = FitTiltedRieman(&cseed[0], kFALSE);
+ chi2Vals[1] = FitTiltedRiemanConstraint(&cseed[0], GetZ());
+ chi2Vals[2] = GetChi2Z(&cseed[0]) / TMath::Max((nlayers - 3.), 1.);
+ // Chi2 definitions in testing stage
+ //chi2Vals[2] = GetChi2ZTest(&cseed[0]);
+ fTrackQuality[ntracks] = CalculateTrackLikelihood(&cseed[0], &chi2Vals[0]);
+ //AliInfo("Hyperplane fit done\n");
+
+ // finalize tracklets
+ Int_t labels[12];
+ Int_t outlab[24];
+ Int_t nlab = 0;
+ for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
+ if (!cseed[iLayer].IsOK()) continue;
+
+ if (cseed[iLayer].GetLabels(0) >= 0) {
+ labels[nlab] = cseed[iLayer].GetLabels(0);
+ nlab++;
+ }
- if (cseed[iLayer].GetLabels(1) >= 0) {
- labels[nlab] = cseed[iLayer].GetLabels(1);
- nlab++;
- }
- }
- Freq(nlab,labels,outlab,kFALSE);
- Int_t label = outlab[0];
- Int_t frequency = outlab[1];
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- cseed[iLayer].SetFreq(frequency);
- cseed[iLayer].SetC(param[1]/*cR*/);
- cseed[iLayer].SetCC(param[0]/*cC*/);
- cseed[iLayer].SetChi2(chi2[0]);
- cseed[iLayer].SetChi2Z(chi2ZF);
- }
-
-#ifdef DEBUG
- if(AliTRDReconstructor::StreamLevel() >= 2){
- Double_t curv = (fFitter->GetRiemanFitter())->GetC();
- TTreeSRedirector &cstreamer = *fDebugStreamerV1;
- cstreamer << "MakeSeeds2"
- << "C=" << curv
- << "Chi2R=" << chi2r
- << "Chi2Z=" << chi2z
- << "Chi2TR=" << chi2[0]
- << "Chi2TC=" << chi2[1]
- << "Chi2RF=" << chi2RF
- << "Chi2ZF=" << chi2ZF
- << "Ncl=" << nclusters
- << "Nlayers=" << nlayers
- << "NUsedS=" << nUsedCl
- << "NUsed=" << nusedf
- << "Findable" << findable
- << "Like=" << like
- << "S0.=" << &cseed[0]
- << "S1.=" << &cseed[1]
- << "S2.=" << &cseed[2]
- << "S3.=" << &cseed[3]
- << "S4.=" << &cseed[4]
- << "S5.=" << &cseed[5]
- << "Label=" << label
- << "Freq=" << frequency
- << "\n";
- }
-#endif
+ if (cseed[iLayer].GetLabels(1) >= 0) {
+ labels[nlab] = cseed[iLayer].GetLabels(1);
+ nlab++;
+ }
+ }
+ Freq(nlab,labels,outlab,kFALSE);
+ Int_t label = outlab[0];
+ Int_t frequency = outlab[1];
+ for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
+ cseed[iLayer].SetFreq(frequency);
+ cseed[iLayer].SetChi2Z(chi2[1]);
+ }
+
+ if(AliTRDReconstructor::StreamLevel() >= 2){
+ TTreeSRedirector &cstreamer = *fgDebugStreamer;
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
+ TLinearFitter *fitterTC = GetTiltedRiemanFitterConstraint();
+ TLinearFitter *fitterT = GetTiltedRiemanFitter();
+ cstreamer << "MakeSeeds2"
+ << "EventNumber=" << eventNumber
+ << "CandidateNumber=" << candidateNumber
+ << "Chi2TR=" << chi2Vals[0]
+ << "Chi2TC=" << chi2Vals[1]
+ << "Nlayers=" << nlayers
+ << "NUsedS=" << nUsedCl
+ << "NUsed=" << nusedf
+ << "Like=" << like
+ << "S0.=" << &cseed[0]
+ << "S1.=" << &cseed[1]
+ << "S2.=" << &cseed[2]
+ << "S3.=" << &cseed[3]
+ << "S4.=" << &cseed[4]
+ << "S5.=" << &cseed[5]
+ << "Label=" << label
+ << "Freq=" << frequency
+ << "FitterT.=" << fitterT
+ << "FitterTC.=" << fitterTC
+ << "\n";
+ }
- ntracks++;
- if(ntracks == kMaxTracksStack){
- AliWarning(Form("Number of seeds reached maximum allowed (%d) in stack.", kMaxTracksStack));
- return ntracks;
- }
- cseed += 6;
+ ntracks++;
+ AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1);
+ if(ntracks == kMaxTracksStack){
+ AliWarning(Form("Number of seeds reached maximum allowed (%d) in stack.", kMaxTracksStack));
+ for(int isl=0; isl<4; isl++) delete layer[isl];
+ return ntracks;
+ }
+ cseed += 6;
}
}
}
}
//_____________________________________________________________________________
-AliTRDtrack *AliTRDtrackerV1::RegisterSeed(AliTRDseedV1 *seeds, Double_t *params)
+AliTRDtrackV1* AliTRDtrackerV1::MakeTrack(AliTRDseedV1 *seeds, Double_t *params)
{
- //
- // Build a TRD track out of tracklet candidates
- //
- // Parameters :
- // seeds : array of tracklets
- // params : track parameters (see MakeSeeds() function body for a detailed description)
- //
- // Output :
- // The TRD track.
- //
- // Detailed description
- //
- // To be discussed with Marian !!
- //
-
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
-
- Double_t alpha = AliTRDgeometry::GetAlpha();
- Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
- Double_t c[15];
-
- c[ 0] = 0.2;
- c[ 1] = 0.0; c[ 2] = 2.0;
- c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
- c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
- c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
-
- Int_t index = 0;
- AliTRDcluster *cl = 0;
-
- for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
- if (seeds[ilayer].IsOK()) {
- for (Int_t itime = nTimeBins - 1; itime > 0; itime--) {
- if (seeds[ilayer].GetIndexes(itime) > 0) {
- index = seeds[ilayer].GetIndexes(itime);
- cl = seeds[ilayer].GetClusters(itime);
- break;
- }
- }
- }
- if (index > 0) {
- break;
- }
- }
- if (cl == 0) return 0;
- AliTRDtrack *track = new AliTRDtrack(cl
- ,index
- ,¶ms[1]
- ,c
- ,params[0]
- ,params[6]*alpha+shift);
- // SetCluster(cl, 0); // A. Bercuci
+ //
+ // Build a TRD track out of tracklet candidates
+ //
+ // Parameters :
+ // seeds : array of tracklets
+ // params : track parameters (see MakeSeeds() function body for a detailed description)
+ //
+ // Output :
+ // The TRD track.
+ //
+ // Detailed description
+ //
+ // To be discussed with Marian !!
+ //
+
+ AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance();
+ if (!calibra) AliInfo("Could not get Calibra instance\n");
+
+ Double_t alpha = AliTRDgeometry::GetAlpha();
+ Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
+ Double_t c[15];
+
+ c[ 0] = 0.2;
+ c[ 1] = 0.0; c[ 2] = 2.0;
+ c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
+ c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
+ c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
+
+ AliTRDtrackV1 *track = new AliTRDtrackV1(seeds, ¶ms[1], c, params[0], params[6]*alpha+shift);
track->PropagateTo(params[0]-5.0);
- track->ResetCovariance(1);
- Int_t rc = FollowBackProlongation(*track);
- if (rc < 30) {
- delete track;
- track = 0;
- }
- else {
- track->CookdEdx();
- track->CookdEdxTimBin(-1);
- CookLabel(track,0.9);
- }
-
- return track;
+ track->ResetCovariance(1);
+ Int_t nc = FollowBackProlongation(*track);
+ //AliInfo(Form("N clusters for track %d", nc));
+ if (nc < 30) {
+ delete track;
+ track = 0x0;
+ } else {
+ track->CookdEdx();
+ track->CookdEdxTimBin(-1);
+ track->CookLabel(.9);
+ // computes PID for track
+ track->CookPID();
+ // update calibration references using this track
+ if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(track);
+ }
+
+ return track;
}
+
//____________________________________________________________________
-void AliTRDtrackerV1::ImproveSeedQuality(AliTRDstackLayer *layers
- , AliTRDseedV1 *cseed)
+Int_t AliTRDtrackerV1::ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *cseed)
{
- //
- // Sort tracklets according to "quality" and try to "improve" the first 4 worst
- //
- // Parameters :
- // layers : Array of propagation layers for a stack/supermodule
- // cseed : Array of 6 seeding tracklets which has to be improved
- //
- // Output :
- // cssed : Improved seeds
- //
- // Detailed description
- //
- // Iterative procedure in which new clusters are searched for each
- // tracklet seed such that the seed quality (see AliTRDseed::GetQuality())
- // can be maximized. If some optimization is found the old seeds are replaced.
- //
-
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
+ //
+ // Sort tracklets according to "quality" and try to "improve" the first 4 worst
+ //
+ // Parameters :
+ // layers : Array of propagation layers for a stack/supermodule
+ // cseed : Array of 6 seeding tracklets which has to be improved
+ //
+ // Output :
+ // cssed : Improved seeds
+ //
+ // Detailed description
+ //
+ // Iterative procedure in which new clusters are searched for each
+ // tracklet seed such that the seed quality (see AliTRDseed::GetQuality())
+ // can be maximized. If some optimization is found the old seeds are replaced.
+ //
+ // debug level: 7
+ //
// make a local working copy
+ AliTRDtrackingChamber *chamber = 0x0;
AliTRDseedV1 bseed[6];
+ Int_t nLayers = 0;
for (Int_t jLayer = 0; jLayer < 6; jLayer++) bseed[jLayer] = cseed[jLayer];
-
-
+
Float_t lastquality = 10000.0;
Float_t lastchi2 = 10000.0;
Float_t chi2 = 1000.0;
for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
squality[jLayer] = bseed[jLayer].IsOK() ? bseed[jLayer].GetQuality(kTRUE) : -1.;
- sumquality +=squality[jLayer];
+ sumquality += squality[jLayer];
}
if ((sumquality >= lastquality) || (chi2 > lastchi2)) break;
-
+ nLayers = 0;
lastquality = sumquality;
lastchi2 = chi2;
if (iter > 0) for (Int_t jLayer = 0; jLayer < 6; jLayer++) cseed[jLayer] = bseed[jLayer];
-
TMath::Sort(6, squality, sortindexes, kFALSE);
for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
Int_t bLayer = sortindexes[jLayer];
- bseed[bLayer].AttachClustersIter(&layers[bLayer*nTimeBins], squality[bLayer], kTRUE);
+ if(!(chamber = stack[bLayer])) continue;
+ bseed[bLayer].AttachClustersIter(chamber, squality[bLayer], kTRUE);
+ if(bseed[bLayer].IsOK()) nLayers++;
}
- chi2 = AliTRDseedV1::FitRiemanTilt(bseed,kTRUE);
+ chi2 = FitTiltedRieman(bseed, kTRUE);
+ if(AliTRDReconstructor::StreamLevel() >= 7){
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
+ TLinearFitter *tiltedRieman = GetTiltedRiemanFitter();
+ TTreeSRedirector &cstreamer = *fgDebugStreamer;
+ cstreamer << "ImproveSeedQuality"
+ << "EventNumber=" << eventNumber
+ << "CandidateNumber=" << candidateNumber
+ << "Iteration=" << iter
+ << "S0.=" << &bseed[0]
+ << "S1.=" << &bseed[1]
+ << "S2.=" << &bseed[2]
+ << "S3.=" << &bseed[3]
+ << "S4.=" << &bseed[4]
+ << "S5.=" << &bseed[5]
+ << "FitterT.=" << tiltedRieman
+ << "\n";
+ }
} // Loop: iter
+
+ // we are sure that at least 2 tracklets are OK !
+ return nLayers+2;
}
-//____________________________________________________________________
-Double_t AliTRDtrackerV1::CookPlaneQA(AliTRDstackLayer *layers)
-{
- //
- // Calculate plane quality for seeding.
- //
- //
- // Parameters :
- // layers : Array of propagation layers for this plane.
- //
- // Output :
- // plane quality factor for seeding
- //
- // Detailed description
- //
- // The quality of the plane for seeding is higher if:
- // 1. the average timebin population is closer to an integer number
- // 2. the distribution of clusters/timebin is closer to a uniform distribution.
- // - the slope of the first derivative of a parabolic fit is small or
- // - the slope of a linear fit is small
- //
-
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
-
-// Double_t x;
-// TLinearFitter fitter(1, "pol1");
-// fitter.ClearPoints();
- Int_t ncl = 0;
- Int_t nused = 0;
- Int_t nClLayer;
- for(int itb=0; itb<nTimeBins; itb++){
- //x = layer[itb].GetX();
- //printf("x[%d] = %f nCls %d\n", itb, x, layer[itb].GetNClusters());
- //if(!layer[itb].GetNClusters()) continue;
- //fitter.AddPoint(&x, layer[itb].GetNClusters(), 1.);
- nClLayer = layers[itb].GetNClusters();
- ncl += nClLayer;
- for(Int_t incl = 0; incl < nClLayer; incl++)
- if((layers[itb].GetCluster(incl))->IsUsed()) nused++;
- }
-
- // calculate the deviation of the mean number of clusters from the
- // closest integer values
- Float_t nclMed = float(ncl-nused)/nTimeBins;
- Int_t ncli = Int_t(nclMed);
- Float_t nclDev = TMath::Abs(nclMed - TMath::Max(ncli, 1));
- nclDev -= (nclDev>.5) && ncli ? .5 : 0.;
- /*Double_t quality = */ return TMath::Exp(-2.*nclDev);
-
-// // get slope of the derivative
-// if(!fitter.Eval()) return quality;
-// fitter.PrintResults(3);
-// Double_t a = fitter.GetParameter(1);
-//
-// printf("nclDev(%f) a(%f)\n", nclDev, a);
-// return quality*TMath::Exp(-a);
+//_________________________________________________________________________
+Double_t AliTRDtrackerV1::CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2){
+ //
+ // Calculates the Track Likelihood value. This parameter serves as main quality criterion for
+ // the track selection
+ // The likelihood value containes:
+ // - The chi2 values from the both fitters and the chi2 values in z-direction from a linear fit
+ // - The Sum of the Parameter |slope_ref - slope_fit|/Sigma of the tracklets
+ // For all Parameters an exponential dependency is used
+ //
+ // Parameters: - Array of tracklets (AliTRDseedV1) related to the track candidate
+ // - Array of chi2 values:
+ // * Non-Constrained Tilted Riemann fit
+ // * Vertex-Constrained Tilted Riemann fit
+ // * z-Direction from Linear fit
+ // Output: - The calculated track likelihood
+ //
+ // debug level 2
+ //
+
+ Double_t sumdaf = 0, nLayers = 0;
+ for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) {
+ if(!tracklets[iLayer].IsOK()) continue;
+ sumdaf += TMath::Abs((tracklets[iLayer].GetYfit(1) - tracklets[iLayer].GetYref(1))/ tracklets[iLayer].GetSigmaY2());
+ nLayers++;
+ }
+ sumdaf /= Float_t (nLayers - 2.0);
+
+ Double_t likeChi2Z = TMath::Exp(-chi2[2] * 0.14); // Chi2Z
+ Double_t likeChi2TC = TMath::Exp(-chi2[1] * 0.677); // Constrained Tilted Riemann
+ Double_t likeChi2TR = TMath::Exp(-chi2[0] * 0.78); // Non-constrained Tilted Riemann
+ Double_t likeAF = TMath::Exp(-sumdaf * 3.23);
+ Double_t trackLikelihood = likeChi2Z * likeChi2TR * likeAF;
+
+ if(AliTRDReconstructor::StreamLevel() >= 2){
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
+ TTreeSRedirector &cstreamer = *fgDebugStreamer;
+ cstreamer << "CalculateTrackLikelihood0"
+ << "EventNumber=" << eventNumber
+ << "CandidateNumber=" << candidateNumber
+ << "LikeChi2Z=" << likeChi2Z
+ << "LikeChi2TR=" << likeChi2TR
+ << "LikeChi2TC=" << likeChi2TC
+ << "LikeAF=" << likeAF
+ << "TrackLikelihood=" << trackLikelihood
+ << "\n";
+ }
+
+ return trackLikelihood;
}
//____________________________________________________________________
-Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed
- , Int_t planes[4]
- , Double_t *chi2)
+Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]
+ , Double_t *chi2)
{
- //
- // Calculate the probability of this track candidate.
- //
- // Parameters :
- // cseeds : array of candidate tracklets
- // planes : array of seeding planes (see seeding configuration)
- // chi2 : chi2 values (on the Z and Y direction) from the rieman fit of the track.
- //
- // Output :
- // likelihood value
- //
- // Detailed description
- //
- // The track quality is estimated based on the following 4 criteria:
- // 1. precision of the rieman fit on the Y direction (likea)
- // 2. chi2 on the Y direction (likechi2y)
- // 3. chi2 on the Z direction (likechi2z)
- // 4. number of attached clusters compared to a reference value
- // (see AliTRDrecoParam::fkFindable) (likeN)
- //
- // The distributions for each type of probabilities are given below as of
- // (date). They have to be checked to assure consistency of estimation.
- //
-
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
+ //
+ // Calculate the probability of this track candidate.
+ //
+ // Parameters :
+ // cseeds : array of candidate tracklets
+ // planes : array of seeding planes (see seeding configuration)
+ // chi2 : chi2 values (on the Z and Y direction) from the rieman fit of the track.
+ //
+ // Output :
+ // likelihood value
+ //
+ // Detailed description
+ //
+ // The track quality is estimated based on the following 4 criteria:
+ // 1. precision of the rieman fit on the Y direction (likea)
+ // 2. chi2 on the Y direction (likechi2y)
+ // 3. chi2 on the Z direction (likechi2z)
+ // 4. number of attached clusters compared to a reference value
+ // (see AliTRDrecoParam::fkFindable) (likeN)
+ //
+ // The distributions for each type of probabilities are given below as of
+ // (date). They have to be checked to assure consistency of estimation.
+ //
+
// ratio of the total number of clusters/track which are expected to be found by the tracker.
- Float_t fgFindable = fRecoParam->GetFindableClusters();
+ Float_t fgFindable = AliTRDReconstructor::RecoParam()->GetFindableClusters();
Int_t nclusters = 0;
}
Double_t likea = TMath::Exp(-sumda*10.6);
Double_t likechi2y = 0.0000000001;
- if (chi2[1] < 0.5) likechi2y += TMath::Exp(-TMath::Sqrt(chi2[1]) * 7.73);
- Double_t likechi2z = TMath::Exp(-chi2[0] * 0.088) / TMath::Exp(-chi2[0] * 0.019);
- Int_t enc = Int_t(fgFindable*4.*nTimeBins); // Expected Number Of Clusters, normally 72
+ if (chi2[0] < 0.5) likechi2y += TMath::Exp(-TMath::Sqrt(chi2[0]) * 7.73);
+ Double_t likechi2z = TMath::Exp(-chi2[1] * 0.088) / TMath::Exp(-chi2[1] * 0.019);
+ Int_t enc = Int_t(fgFindable*4.*fgNTimeBins); // Expected Number Of Clusters, normally 72
Double_t likeN = TMath::Exp(-(enc - nclusters) * 0.19);
Double_t like = likea * likechi2y * likechi2z * likeN;
-#ifdef DEBUG
- //AliInfo(Form("sumda(%f) chi2[0](%f) chi2[1](%f) likea(%f) likechi2y(%f) likechi2z(%f) nclusters(%d) likeN(%f)", sumda, chi2[0], chi2[1], likea, likechi2y, likechi2z, nclusters, likeN));
+ // AliInfo(Form("sumda(%f) chi2[0](%f) chi2[1](%f) likea(%f) likechi2y(%f) likechi2z(%f) nclusters(%d) likeN(%f)", sumda, chi2[0], chi2[1], likea, likechi2y, likechi2z, nclusters, likeN));
if(AliTRDReconstructor::StreamLevel() >= 2){
- TTreeSRedirector &cstreamer = *fDebugStreamerV1;
+ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber();
+ Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber();
+ // The Debug Stream contains the seed
+ TTreeSRedirector &cstreamer = *fgDebugStreamer;
cstreamer << "CookLikelihood"
- << "sumda=" << sumda
- << "chi0=" << chi2[0]
- << "chi1=" << chi2[1]
- << "likea=" << likea
- << "likechi2y=" << likechi2y
- << "likechi2z=" << likechi2z
- << "nclusters=" << nclusters
- << "likeN=" << likeN
- << "like=" << like
- << "\n";
- }
-#endif
-
- return like;
-}
-
-//___________________________________________________________________
-void AliTRDtrackerV1::GetMeanCLStack(AliTRDstackLayer *layers
- , Int_t *planes
- , Double_t *params)
-{
- //
- // Determines the Mean number of clusters per layer.
- // Needed to determine good Seeding Layers
- //
- // Parameters:
- // - Array of AliTRDstackLayers
- // - Container for the params
- //
- // Detailed description
- //
- // Two Iterations:
- // In the first Iteration the mean is calculted using all layers.
- // After this, all layers outside the 1-sigma-region are rejected.
- // Then the mean value and the standard-deviation are calculted a second
- // time in order to select all layers in the 1-sigma-region as good-candidates.
- //
-
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
-
- Float_t mean = 0, stdev = 0;
- Double_t ncl[kNTimeBins*kNSeedPlanes], mcl[kNTimeBins*kNSeedPlanes];
- Int_t position = 0;
- memset(ncl, 0, sizeof(Int_t)*kNTimeBins*kNSeedPlanes);
- memset(mcl, 0, sizeof(Int_t)*kNTimeBins*kNSeedPlanes);
- Int_t nused = 0;
- for(Int_t ipl = 0; ipl < kNSeedPlanes; ipl++){
- for(Int_t ils = 0; ils < nTimeBins; ils++){
- position = planes[ipl]*nTimeBins + ils;
- ncl[ipl * nTimeBins + ils] = layers[position].GetNClusters();
- nused = 0;
- for(Int_t icl = 0; icl < ncl[ipl * nTimeBins + ils]; icl++)
- if((layers[position].GetCluster(icl))->IsUsed()) nused++;
- ncl[ipl * nTimeBins + ils] -= nused;
- }
+ << "EventNumber=" << eventNumber
+ << "CandidateNumber=" << candidateNumber
+ << "tracklet0.=" << &cseed[0]
+ << "tracklet1.=" << &cseed[1]
+ << "tracklet2.=" << &cseed[2]
+ << "tracklet3.=" << &cseed[3]
+ << "tracklet4.=" << &cseed[4]
+ << "tracklet5.=" << &cseed[5]
+ << "sumda=" << sumda
+ << "chi0=" << chi2[0]
+ << "chi1=" << chi2[1]
+ << "likea=" << likea
+ << "likechi2y=" << likechi2y
+ << "likechi2z=" << likechi2z
+ << "nclusters=" << nclusters
+ << "likeN=" << likeN
+ << "like=" << like
+ << "\n";
}
- // Declaration of quartils:
- //Double_t qvals[3] = {0.0, 0.0, 0.0};
- //Double_t qprop[3] = {0.16667, 0.5, 0.83333};
- // Iterations
- Int_t counter;
- Double_t *array;
- Int_t *limit;
- Int_t nLayers = nTimeBins * kNSeedPlanes;
- for(Int_t iter = 0; iter < 2; iter++){
- array = (iter == 0) ? &ncl[0] : &mcl[0];
- limit = (iter == 0) ? &nLayers : &counter;
- counter = 0;
- if(iter == 1){
- for(Int_t i = 0; i < nTimeBins *kNSeedPlanes; i++){
- if((ncl[i] > mean + stdev) || (ncl[i] < mean - stdev)) continue; // Outside 1-sigma region
-// if((ncl[i] > qvals[2]) || (ncl[i] < qvals[0])) continue; // Outside 1-sigma region
- if(ncl[i] == 0) continue; // 0-Layers also rejected
- mcl[counter] = ncl[i];
- counter++;
- }
- }
- if(*limit == 0) break;
- printf("Limit = %d\n", *limit);
- //using quartils instead of mean and RMS
-// TMath::Quantiles(*limit,3,array,qvals,qprop,kFALSE);
- mean = TMath::Median(*limit, array, 0x0);
- stdev = TMath::RMS(*limit, array);
- }
-// printf("Quantiles: 0.16667 = %3.3f, 0.5 = %3.3f, 0.83333 = %3.3f\n", qvals[0],qvals[1],qvals[2]);
-// memcpy(params,qvals,sizeof(Double_t)*3);
- params[1] = (Double_t)TMath::Nint(mean);
- params[0] = (Double_t)TMath::Nint(mean - stdev);
- params[2] = (Double_t)TMath::Nint(mean + stdev);
+ return like;
}
-//___________________________________________________________________
-Int_t AliTRDtrackerV1::GetSeedingLayers(AliTRDstackLayer *layers
- , Double_t *params)
-{
- //
- // Algorithm to find optimal seeding layer
- // Layers inside one sigma region (given by Quantiles) are sorted
- // according to their difference.
- // All layers outside are sorted according t
- //
- // Parameters:
- // - Array of AliTRDstackLayers (in the current plane !!!)
- // - Container for the Indices of the seeding Layer candidates
- //
- // Output:
- // - Number of Layers inside the 1-sigma-region
- //
- // The optimal seeding layer should contain the mean number of
- // custers in the layers in one chamber.
- //
-
- //printf("Params: %3.3f, %3.3f, %3.3f\n", params[0], params[1], params[2]);
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- const Int_t kMaxClustersLayer = AliTRDstackLayer::kMaxClustersLayer;
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
- Int_t ncl[kNTimeBins], indices[kNTimeBins], bins[kMaxClustersLayer];
- memset(ncl, 0, sizeof(Int_t)*kNTimeBins);
- memset(indices, 0, sizeof(Int_t)*kNTimeBins);
- memset(bins, 0, sizeof(Int_t)*kMaxClustersLayer);
- Int_t nused = 0;
- for(Int_t ils = 0; ils < nTimeBins; ils++){
- ncl[ils] = layers[ils].GetNClusters();
- nused = 0;
- for(Int_t icl = 0; icl < ncl[ils]; icl++)
- if((layers[ils].GetCluster(icl))->IsUsed()) nused++;
- ncl[ils] -= nused;
- }
-
- Float_t mean = params[1];
- for(Int_t ils = 0; ils < nTimeBins; ils++){
- memmove(indices + bins[ncl[ils]+1] + 1, indices + bins[ncl[ils]+1], sizeof(Int_t)*(nTimeBins - ils));
- indices[bins[ncl[ils]+1]] = ils;
- for(Int_t i = ncl[ils]+1; i < kMaxClustersLayer; i++)
- bins[i]++;
- }
-
- //for(Int_t i = 0; i < nTimeBins; i++) printf("Bin %d = %d\n", i, bins[i]);
- Int_t sbin = -1;
- Int_t nElements;
- Int_t position = 0;
- TRandom *r = new TRandom();
- Int_t iter = 0;
- while(1){
- while(sbin < (Int_t)params[0] || sbin > (Int_t)params[2]){
- // Randomly selecting one bin
- sbin = (Int_t)r->Poisson(mean);
- }
- printf("Bin = %d\n",sbin);
- //Randomly selecting one Layer in the bin
- nElements = bins[sbin + 1] - bins[sbin];
- printf("nElements = %d\n", nElements);
- if(iter == 5){
- position = (Int_t)(gRandom->Rndm()*(nTimeBins-1));
- break;
- }
- else if(nElements==0){
- iter++;
- continue;
- }
- position = (Int_t)(gRandom->Rndm()*(nElements-1)) + bins[sbin];
- break;
- }
- delete r;
- return indices[position];
-}
-
-//____________________________________________________________________
-AliTRDcluster *AliTRDtrackerV1::FindSeedingCluster(AliTRDstackLayer *layers
- , AliTRDseedV1/*AliRieman*/ *reference)
-{
- //
- // Finds a seeding Cluster for the extrapolation chamber.
- //
- // The seeding cluster should be as close as possible to the assumed
- // track which is represented by a Rieman fit.
- // Therefore the selecting criterion is the minimum distance between
- // the best fitting cluster and the Reference which is derived from
- // the AliTRDseed. Because all layers are assumed to be equally good
- // a linear search is performed.
- //
- // Imput parameters: - layers: array of AliTRDstackLayers (in one chamber!!!)
- // - sfit: the reference
- //
- // Output: - the best seeding cluster
- //
-
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
-
- // distances as squared distances
- Int_t index = 0;
- Float_t ypos = 0.0, zpos = 0.0, distance = 0.0, nearestDistance =100000.0;
- ypos = reference->GetYref(0);
- zpos = reference->GetZref(0);
- AliTRDcluster *currentBest = 0x0, *temp = 0x0;
- for(Int_t ils = 0; ils < nTimeBins; ils++){
- // Reference positions
-// ypos = reference->GetYat(layers[ils].GetX());
-// zpos = reference->GetZat(layers[ils].GetX());
- index = layers[ils].SearchNearestCluster(ypos, zpos, fRecoParam->GetRoad2y(), fRecoParam->GetRoad2z());
- if(index == -1) continue;
- temp = layers[ils].GetCluster(index);
- if(!temp) continue;
- distance = (temp->GetY() - ypos) * (temp->GetY() - ypos) + (temp->GetZ() - zpos) * (temp->GetZ() - zpos);
- if(distance < nearestDistance){
- nearestDistance = distance;
- currentBest = temp;
- }
- }
- return currentBest;
-}
-//____________________________________________________________________
-AliTRDstackLayer *AliTRDtrackerV1::MakeSeedingLayer(AliTRDstackLayer *layers
- , Int_t plane)
-{
- //
- // Creates a seeding layer
- //
-
- // constants
- const Int_t kMaxRows = 16;
- const Int_t kMaxCols = 144;
- const Int_t kMaxPads = 2304;
-
- // Get the calculation
- AliTRDcalibDB *cal = AliTRDcalibDB::Instance();
- Int_t nTimeBins = cal->GetNumberOfTimeBins();
-
- // Get the geometrical data of the chamber
- AliTRDpadPlane *pp = fGeom->GetPadPlane(plane, layers[0].GetStackNr());
- Int_t nCols = pp->GetNcols();
- Float_t ymin = TMath::Min(pp->GetCol0(), pp->GetColEnd());
- Float_t ymax = TMath::Max(pp->GetCol0(), pp->GetColEnd());
- Float_t zmin = TMath::Min(pp->GetRow0(), pp->GetRowEnd());
- Float_t zmax = TMath::Max(pp->GetRow0(), pp->GetRowEnd());
- Int_t nRows = pp->GetNrows();
- Float_t binlength = (ymax - ymin)/nCols;
- //AliInfo(Form("ymin(%f) ymax(%f) zmin(%f) zmax(%f) nRows(%d) binlength(%f)", ymin, ymax, zmin, zmax, nRows, binlength));
-
- // Fill the histogram
- Int_t arrpos;
- Float_t ypos;
- Int_t irow, nClusters;
- Int_t *histogram[kMaxRows]; // 2D-Histogram
- Int_t hvals[kMaxPads]; memset(hvals, 0, sizeof(Int_t)*kMaxPads);
- Float_t *sigmas[kMaxRows];
- Float_t svals[kMaxPads]; memset(svals, 0, sizeof(Float_t)*kMaxPads);
- AliTRDcluster *c = 0x0;
- for(Int_t irs = 0; irs < kMaxRows; irs++){
- histogram[irs] = &hvals[irs*kMaxCols];
- sigmas[irs] = &svals[irs*kMaxCols];
- }
- for(Int_t iTime = 0; iTime < nTimeBins; iTime++){
- nClusters = layers[iTime].GetNClusters();
- for(Int_t incl = 0; incl < nClusters; incl++){
- c = layers[iTime].GetCluster(incl);
- ypos = c->GetY();
- if(ypos > ymax && ypos < ymin) continue;
- irow = pp->GetPadRowNumber(c->GetZ()); // Zbin
- if(irow < 0)continue;
- arrpos = static_cast<Int_t>((ypos - ymin)/binlength);
- if(ypos == ymax) arrpos = nCols - 1;
- histogram[irow][arrpos]++;
- sigmas[irow][arrpos] += c->GetSigmaZ2();
- }
- }
-
-// Now I have everything in the histogram, do the selection
-// printf("Starting the analysis\n");
- //Int_t nPads = nCols * nRows;
- // This is what we are interested in: The center of gravity of the best candidates
- Float_t cogyvals[kMaxPads]; memset(cogyvals, 0, sizeof(Float_t)*kMaxPads);
- Float_t cogzvals[kMaxPads]; memset(cogzvals, 0, sizeof(Float_t)*kMaxPads);
- Float_t *cogy[kMaxRows];
- Float_t *cogz[kMaxRows];
- // Lookup-Table storing coordinates according ti the bins
- Float_t yLengths[kMaxCols];
- Float_t zLengths[kMaxRows];
- for(Int_t icnt = 0; icnt < nCols; icnt++){
- yLengths[icnt] = pp->GetColPos(nCols - 1 - icnt) + binlength/2;
- }
- for(Int_t icnt = 0; icnt < nRows; icnt++){
- zLengths[icnt] = pp->GetRowPos(icnt) - pp->GetRowSize(icnt)/2;
- }
-
- // A bitfield is used to mask the pads as usable
- Short_t mask[kMaxCols]; memset(mask, 0 ,sizeof(Short_t) * kMaxCols);//bool mvals[kMaxPads];
- for(UChar_t icount = 0; icount < nRows; icount++){
- cogy[icount] = &cogyvals[icount*kMaxCols];
- cogz[icount] = &cogzvals[icount*kMaxCols];
- }
- // In this array the array position of the best candidates will be stored
- Int_t cand[kMaxTracksStack];
- Float_t sigcands[kMaxTracksStack];
-
- // helper variables
- Int_t indices[kMaxPads]; memset(indices, 0, sizeof(Int_t)*kMaxPads);
- Int_t nCandidates = 0;
- Float_t norm, cogv;
- // histogram filled -> Select best bins
- TMath::Sort(kMaxPads, hvals, indices); // bins storing a 0 should not matter
- // Set Threshold
- Int_t maximum = hvals[indices[0]]; // best
- Int_t threshold = static_cast<UChar_t>(maximum * fRecoParam->GetFindableClusters());
- Int_t col, row, lower, lower1, upper, upper1;
- for(Int_t ib = 0; ib < kMaxPads; ib++){
- if(nCandidates >= kMaxTracksStack){
- AliWarning(Form("Number of seed candidates %d exceeded maximum allowed per stack %d", nCandidates, kMaxTracksStack));
- break;
- }
- // Positions
- row = indices[ib]/nCols;
- col = indices[ib]%nCols;
- // here will be the threshold condition:
- if((mask[col] & (1 << row)) != 0) continue; // Pad is masked: continue
- if(histogram[row][col] < TMath::Max(threshold, 1)){ // of course at least one cluster is needed
- break; // number of clusters below threshold: break;
- }
- // passing: Mark the neighbors
- lower = TMath::Max(col - 1, 0); upper = TMath::Min(col + 2, nCols);
- lower1 = TMath::Max(row - 1, 0); upper1 = TMath::Min(row + 2, nCols);
- for(Int_t ic = lower; ic < upper; ++ic)
- for(Int_t ir = lower1; ir < upper1; ++ir){
- if(ic == col && ir == row) continue;
- mask[ic] |= (1 << ir);
- }
- // Storing the position in an array
- // testing for neigboring
- cogv = 0;
- norm = 0;
- lower = TMath::Max(col - 1,0);
- upper = TMath::Min(col + 2, nCols);
- for(Int_t inb = lower; inb < upper; ++inb){
- cogv += yLengths[inb] * histogram[row][inb];
- norm += histogram[row][inb];
- }
- cogy[row][col] = cogv / norm;
- cogv = 0; norm = 0;
- lower = TMath::Max(row - 1, 0);
- upper = TMath::Min(row + 2, nRows);
- for(Int_t inb = lower; inb < upper; ++inb){
- cogv += zLengths[inb] * histogram[inb][col];
- norm += histogram[inb][col];
- }
- cogz[row][col] = cogv / norm;
- // passed the filter
- cand[nCandidates] = row*kMaxCols + col; // store the position of a passig candidate into an Array
- sigcands[nCandidates] = sigmas[row][col] / histogram[row][col]; // never be a floating point exeption
- // Analysis output
- nCandidates++;
- }
- AliTRDstackLayer *fakeLayer = new AliTRDstackLayer(layers[0].GetZ0(), layers[0].GetDZ0(), layers[0].GetStackNr());
- fakeLayer->SetX((TMath::Abs(layers[nTimeBins-1].GetX() + layers[0].GetX()))/2);
- fakeLayer->SetSector(layers[0].GetSector());
- AliTRDcluster **fakeClusters = 0x0;
- UInt_t *fakeIndices = 0x0;
- if(nCandidates){
- fakeClusters = new AliTRDcluster*[nCandidates];
- fakeIndices = new UInt_t[nCandidates];
- UInt_t fakeIndex = 0;
- for(Int_t ican = 0; ican < nCandidates; ican++){
- fakeClusters[ican] = new AliTRDcluster();
- fakeClusters[ican]->SetX(fakeLayer->GetX());
- fakeClusters[ican]->SetY(cogyvals[cand[ican]]);
- fakeClusters[ican]->SetZ(cogzvals[cand[ican]]);
- fakeClusters[ican]->SetSigmaZ2(sigcands[ican]);
- fakeIndices[ican] = fakeIndex++;// fantasy number
- }
- }
- fakeLayer->SetRecoParam(fRecoParam);
- fakeLayer->SetClustersArray(fakeClusters, nCandidates);
- fakeLayer->SetIndexArray(fakeIndices);
- fakeLayer->SetNRows(nRows);
- fakeLayer->BuildIndices();
- //fakeLayer->PrintClusters();
-
-#ifdef DEBUG
- if(AliTRDReconstructor::StreamLevel() >= 3){
- TMatrixT<double> hist(nRows, nCols);
- for(Int_t i = 0; i < nRows; i++)
- for(Int_t j = 0; j < nCols; j++)
- hist(i,j) = histogram[i][j];
- TTreeSRedirector &cstreamer = *fDebugStreamerV1;
- cstreamer << "MakeSeedingLayer"
- << "Iteration=" << fSieveSeeding
- << "plane=" << plane
- << "ymin=" << ymin
- << "ymax=" << ymax
- << "zmin=" << zmin
- << "zmax=" << zmax
- << "L.=" << fakeLayer
- << "Histogram.=" << &hist
- << "\n";
- }
-#endif
- return fakeLayer;
-}
//____________________________________________________________________
-void AliTRDtrackerV1::GetSeedingConfig(Int_t iconfig
- , Int_t planes[4]) const
+void AliTRDtrackerV1::GetSeedingConfig(Int_t iconfig, Int_t planes[4])
{
- //
- // Map seeding configurations to detector planes.
- //
- // Parameters :
- // iconfig : configuration index
- // planes : member planes of this configuration. On input empty.
- //
- // Output :
- // planes : contains the planes which are defining the configuration
- //
- // Detailed description
- //
- // Here is the list of seeding planes configurations together with
- // their topological classification:
- //
- // 0 - 5432 TQ 0
- // 1 - 4321 TQ 0
- // 2 - 3210 TQ 0
- // 3 - 5321 TQ 1
- // 4 - 4210 TQ 1
- // 5 - 5431 TQ 1
- // 6 - 4320 TQ 1
- // 7 - 5430 TQ 2
- // 8 - 5210 TQ 2
- // 9 - 5421 TQ 3
- // 10 - 4310 TQ 3
- // 11 - 5410 TQ 4
- // 12 - 5420 TQ 5
- // 13 - 5320 TQ 5
- // 14 - 5310 TQ 5
- //
- // The topologic quality is modeled as follows:
- // 1. The general model is define by the equation:
- // p(conf) = exp(-conf/2)
- // 2. According to the topologic classification, configurations from the same
- // class are assigned the agerage value over the model values.
- // 3. Quality values are normalized.
- //
- // The topologic quality distribution as function of configuration is given below:
- //Begin_Html
- // <img src="gif/topologicQA.gif">
- //End_Html
- //
+ //
+ // Map seeding configurations to detector planes.
+ //
+ // Parameters :
+ // iconfig : configuration index
+ // planes : member planes of this configuration. On input empty.
+ //
+ // Output :
+ // planes : contains the planes which are defining the configuration
+ //
+ // Detailed description
+ //
+ // Here is the list of seeding planes configurations together with
+ // their topological classification:
+ //
+ // 0 - 5432 TQ 0
+ // 1 - 4321 TQ 0
+ // 2 - 3210 TQ 0
+ // 3 - 5321 TQ 1
+ // 4 - 4210 TQ 1
+ // 5 - 5431 TQ 1
+ // 6 - 4320 TQ 1
+ // 7 - 5430 TQ 2
+ // 8 - 5210 TQ 2
+ // 9 - 5421 TQ 3
+ // 10 - 4310 TQ 3
+ // 11 - 5410 TQ 4
+ // 12 - 5420 TQ 5
+ // 13 - 5320 TQ 5
+ // 14 - 5310 TQ 5
+ //
+ // The topologic quality is modeled as follows:
+ // 1. The general model is define by the equation:
+ // p(conf) = exp(-conf/2)
+ // 2. According to the topologic classification, configurations from the same
+ // class are assigned the agerage value over the model values.
+ // 3. Quality values are normalized.
+ //
+ // The topologic quality distribution as function of configuration is given below:
+ //Begin_Html
+
// <img src="gif/topologicQA.gif">
+ //End_Html
+ //
switch(iconfig){
case 0: // 5432 TQ 0
}
//____________________________________________________________________
-void AliTRDtrackerV1::GetExtrapolationConfig(Int_t iconfig
- , Int_t planes[2]) const
+void AliTRDtrackerV1::GetExtrapolationConfig(Int_t iconfig, Int_t planes[2])
{
- //
- // Returns the extrapolation planes for a seeding configuration.
- //
- // Parameters :
- // iconfig : configuration index
- // planes : planes which are not in this configuration. On input empty.
- //
- // Output :
- // planes : contains the planes which are not in the configuration
- //
- // Detailed description
- //
+ //
+ // Returns the extrapolation planes for a seeding configuration.
+ //
+ // Parameters :
+ // iconfig : configuration index
+ // planes : planes which are not in this configuration. On input empty.
+ //
+ // Output :
+ // planes : contains the planes which are not in the configuration
+ //
+ // Detailed description
+ //
switch(iconfig){
case 0: // 5432 TQ 0
break;
}
}
+
+//____________________________________________________________________
+AliCluster* AliTRDtrackerV1::GetCluster(Int_t idx) const
+{
+ Int_t ncls = fClusters->GetEntriesFast();
+ return idx >= 0 || idx < ncls ? (AliCluster*)fClusters->UncheckedAt(idx) : 0x0;
+}
+
+//____________________________________________________________________
+Float_t AliTRDtrackerV1::CalculateReferenceX(AliTRDseedV1 *tracklets){
+ //
+ // Calculates the reference x-position for the tilted Rieman fit defined as middle
+ // of the stack (middle between layers 2 and 3). For the calculation all the tracklets
+ // are taken into account
+ //
+ // Parameters: - Array of tracklets(AliTRDseedV1)
+ //
+ // Output: - The reference x-position(Float_t)
+ //
+ Int_t nDistances = 0;
+ Float_t meanDistance = 0.;
+ Int_t startIndex = 5;
+ for(Int_t il =5; il > 0; il--){
+ if(tracklets[il].IsOK() && tracklets[il -1].IsOK()){
+ Float_t xdiff = tracklets[il].GetX0() - tracklets[il -1].GetX0();
+ meanDistance += xdiff;
+ nDistances++;
+ }
+ if(tracklets[il].IsOK()) startIndex = il;
+ }
+ if(tracklets[0].IsOK()) startIndex = 0;
+ if(!nDistances){
+ // We should normally never get here
+ Float_t xpos[2]; memset(xpos, 0, sizeof(Float_t) * 2);
+ Int_t iok = 0, idiff = 0;
+ // This attempt is worse and should be avoided:
+ // check for two chambers which are OK and repeat this without taking the mean value
+ // Strategy avoids a division by 0;
+ for(Int_t il = 5; il >= 0; il--){
+ if(tracklets[il].IsOK()){
+ xpos[iok] = tracklets[il].GetX0();
+ iok++;
+ startIndex = il;
+ }
+ if(iok) idiff++; // to get the right difference;
+ if(iok > 1) break;
+ }
+ if(iok > 1){
+ meanDistance = (xpos[0] - xpos[1])/idiff;
+ }
+ else{
+ // we have do not even have 2 layers which are OK? The we do not need to fit at all
+ return 331.;
+ }
+ }
+ else{
+ meanDistance /= nDistances;
+ }
+ return tracklets[startIndex].GetX0() + (2.5 - startIndex) * meanDistance - 0.5 * (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
+}
+
+//_____________________________________________________________________________
+Int_t AliTRDtrackerV1::Freq(Int_t n, const Int_t *inlist
+ , Int_t *outlist, Bool_t down)
+{
+ //
+ // Sort eleements according occurancy
+ // The size of output array has is 2*n
+ //
+
+ if (n <= 0) {
+ return 0;
+ }
+
+ Int_t *sindexS = new Int_t[n]; // Temporary array for sorting
+ Int_t *sindexF = new Int_t[2*n];
+ for (Int_t i = 0; i < n; i++) {
+ sindexF[i] = 0;
+ }
+
+ TMath::Sort(n,inlist,sindexS,down);
+
+ Int_t last = inlist[sindexS[0]];
+ Int_t val = last;
+ sindexF[0] = 1;
+ sindexF[0+n] = last;
+ Int_t countPos = 0;
+
+ // Find frequency
+ for (Int_t i = 1; i < n; i++) {
+ val = inlist[sindexS[i]];
+ if (last == val) {
+ sindexF[countPos]++;
+ }
+ else {
+ countPos++;
+ sindexF[countPos+n] = val;
+ sindexF[countPos]++;
+ last = val;
+ }
+ }
+ if (last == val) {
+ countPos++;
+ }
+
+ // Sort according frequency
+ TMath::Sort(countPos,sindexF,sindexS,kTRUE);
+
+ for (Int_t i = 0; i < countPos; i++) {
+ outlist[2*i ] = sindexF[sindexS[i]+n];
+ outlist[2*i+1] = sindexF[sindexS[i]];
+ }
+
+ delete [] sindexS;
+ delete [] sindexF;
+
+ return countPos;
+
+}
+
+//_____________________________________________________________________________
+Float_t AliTRDtrackerV1::GetChi2Y(AliTRDseedV1 *tracklets) const
+{
+ // Chi2 definition on y-direction
+
+ Float_t chi2 = 0;
+ for(Int_t ipl = 0; ipl < kNPlanes; ipl++){
+ if(!tracklets[ipl].IsOK()) continue;
+ Double_t distLayer = tracklets[ipl].GetYfit(0) - tracklets[ipl].GetYref(0);
+ chi2 += distLayer * distLayer;
+ }
+ return chi2;
+}
+
+//_____________________________________________________________________________
+Float_t AliTRDtrackerV1::GetChi2Z(AliTRDseedV1 *tracklets) const
+{
+ // Chi2 definition on z-direction
+
+ Float_t chi2 = 0;
+ for(Int_t ipl = 0; ipl < kNPlanes; ipl++){
+ if(!tracklets[ipl].IsOK()) continue;
+ Double_t distLayer = tracklets[ipl].GetMeanz() - tracklets[ipl].GetZref(0);
+ chi2 += distLayer * distLayer;
+ }
+ return chi2;
+}
+
+///////////////////////////////////////////////////////
+// //
+// Resources of class AliTRDLeastSquare //
+// //
+///////////////////////////////////////////////////////
+
+//_____________________________________________________________________________
+AliTRDtrackerV1::AliTRDLeastSquare::AliTRDLeastSquare(){
+ //
+ // Constructor of the nested class AliTRDtrackFitterLeastSquare
+ //
+ memset(fParams, 0, sizeof(Double_t) * 2);
+ memset(fSums, 0, sizeof(Double_t) * 5);
+ memset(fCovarianceMatrix, 0, sizeof(Double_t) * 3);
+
+}
+
+//_____________________________________________________________________________
+void AliTRDtrackerV1::AliTRDLeastSquare::AddPoint(Double_t *x, Double_t y, Double_t sigmaY){
+ //
+ // Adding Point to the fitter
+ //
+ Double_t weight = 1/(sigmaY * sigmaY);
+ Double_t &xpt = *x;
+ // printf("Adding point x = %f, y = %f, sigma = %f\n", xpt, y, sigmaY);
+ fSums[0] += weight;
+ fSums[1] += weight * xpt;
+ fSums[2] += weight * y;
+ fSums[3] += weight * xpt * y;
+ fSums[4] += weight * xpt * xpt;
+ fSums[5] += weight * y * y;
+}
+
+//_____________________________________________________________________________
+void AliTRDtrackerV1::AliTRDLeastSquare::RemovePoint(Double_t *x, Double_t y, Double_t sigmaY){
+ //
+ // Remove Point from the sample
+ //
+ Double_t weight = 1/(sigmaY * sigmaY);
+ Double_t &xpt = *x;
+ fSums[0] -= weight;
+ fSums[1] -= weight * xpt;
+ fSums[2] -= weight * y;
+ fSums[3] -= weight * xpt * y;
+ fSums[4] -= weight * xpt * xpt;
+ fSums[5] -= weight * y * y;
+}
+
+//_____________________________________________________________________________
+void AliTRDtrackerV1::AliTRDLeastSquare::Eval(){
+ //
+ // Evaluation of the fit:
+ // Calculation of the parameters
+ // Calculation of the covariance matrix
+ //
+
+ Double_t denominator = fSums[0] * fSums[4] - fSums[1] *fSums[1];
+ // for(Int_t isum = 0; isum < 5; isum++)
+ // printf("fSums[%d] = %f\n", isum, fSums[isum]);
+ // printf("denominator = %f\n", denominator);
+ fParams[0] = (fSums[2] * fSums[4] - fSums[1] * fSums[3])/ denominator;
+ fParams[1] = (fSums[0] * fSums[3] - fSums[1] * fSums[2]) / denominator;
+ // printf("fParams[0] = %f, fParams[1] = %f\n", fParams[0], fParams[1]);
+
+ // Covariance matrix
+ fCovarianceMatrix[0] = fSums[4] - fSums[1] * fSums[1] / fSums[0];
+ fCovarianceMatrix[1] = fSums[5] - fSums[2] * fSums[2] / fSums[0];
+ fCovarianceMatrix[2] = fSums[3] - fSums[1] * fSums[2] / fSums[0];
+}
+
+//_____________________________________________________________________________
+Double_t AliTRDtrackerV1::AliTRDLeastSquare::GetFunctionValue(Double_t *xpos) const {
+ //
+ // Returns the Function value of the fitted function at a given x-position
+ //
+ return fParams[0] + fParams[1] * (*xpos);
+}
+
+//_____________________________________________________________________________
+void AliTRDtrackerV1::AliTRDLeastSquare::GetCovarianceMatrix(Double_t *storage) const {
+ //
+ // Copies the values of the covariance matrix into the storage
+ //
+ memcpy(storage, fCovarianceMatrix, sizeof(Double_t) * 3);
+}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff