+++ /dev/null
-/**************************************************************************
- * 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. *
- **************************************************************************/
-
-/* $Id$ */
-
-///////////////////////////////////////////////////////////////////////////////
-// //
-// The standard TRD tracker //
-// Based on Kalman filltering approach //
-// //
-// Authors: //
-// M. Ivanov (Marian.Ivanov@cern.ch) //
-// //
-///////////////////////////////////////////////////////////////////////////////
-
-#include <TBranch.h>
-#include <TFile.h>
-#include <TGraph.h>
-#include <TLinearFitter.h>
-#include <TObjArray.h>
-#include <TROOT.h>
-#include <TTree.h>
-#include <TTreeStream.h>
-
-#include "AliESDEvent.h"
-#include "AliESDtrack.h"
-//#include "AliAlignObj.h"
-#include "AliGeomManager.h"
-#include "AliRieman.h"
-#include "AliTrackPointArray.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 "AliTRDtracker.h"
-#include "AliTRDReconstructor.h"
-#include "AliTRDrecoParam.h"
-#include "AliTRDCalibraFillHisto.h"
-
-ClassImp(AliTRDtracker)
-
-const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5; //
-const Float_t AliTRDtracker::fgkLabelFraction = 0.8; //
-const Double_t AliTRDtracker::fgkMaxChi2 = 12.0; //
-const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // Maximum local sine of the azimuthal angle
-const Double_t AliTRDtracker::fgkMaxStep = 2.0; // Maximal step size in propagation
-
-//_____________________________________________________________________________
-AliTRDtracker::AliTRDtracker(AliTRDReconstructor *rec)
- :AliTracker()
- ,fReconstructor(rec)
- ,fGeom(0)
- ,fNclusters(0)
- ,fClusters(0)
- ,fNseeds(0)
- ,fSeeds(0)
- ,fNtracks(0)
- ,fTracks(0)
- ,fTimeBinsPerPlane(0)
- ,fAddTRDseeds(kFALSE)
- ,fNoTilt(kFALSE)
- ,fHBackfit(NULL)
- ,fHClSearch(NULL)
- ,fHRefit(NULL)
- ,fHX(NULL)
- ,fHNCl(NULL)
- ,fHNClTrack(NULL)
- ,fHMinYPos(NULL)
- ,fHMinYNeg(NULL)
- ,fHMinZ(NULL)
- ,fHMinD(NULL)
- ,fHDeltaX(NULL)
- ,fHXCl(NULL)
- ,fDebugStreamer(0)
-{
- //
- // Default constructor
- //
-
- for (Int_t i = 0; i < kTrackingSectors; i++) {
- fTrSec[i] = 0;
- }
-
- InitLogHists();
-
-}
-
-//_____________________________________________________________________________
-AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
- :AliTracker(t)
- ,fReconstructor(t.fReconstructor)
- ,fGeom(0)
- ,fNclusters(0)
- ,fClusters(0)
- ,fNseeds(0)
- ,fSeeds(0)
- ,fNtracks(0)
- ,fTracks(0)
- ,fTimeBinsPerPlane(0)
- ,fAddTRDseeds(kFALSE)
- ,fNoTilt(kFALSE)
- ,fHBackfit(NULL)
- ,fHClSearch(NULL)
- ,fHRefit(NULL)
- ,fHX(NULL)
- ,fHNCl(NULL)
- ,fHNClTrack(NULL)
- ,fHMinYPos(NULL)
- ,fHMinYNeg(NULL)
- ,fHMinZ(NULL)
- ,fHMinD(NULL)
- ,fHDeltaX(NULL)
- ,fHXCl(NULL)
- ,fDebugStreamer(0)
-{
- //
- // Copy constructor
- //
-
-}
-
-//_____________________________________________________________________________
-AliTRDtracker::AliTRDtracker(const TFile */*geomfile*/, AliTRDReconstructor *rec)
- :AliTracker()
- ,fReconstructor(rec)
- ,fGeom(0)
- ,fNclusters(0)
- ,fClusters(new TObjArray(2000))
- ,fNseeds(0)
- ,fSeeds(new TObjArray(2000))
- ,fNtracks(0)
- ,fTracks(new TObjArray(1000))
- ,fTimeBinsPerPlane(0)
- ,fAddTRDseeds(kFALSE)
- ,fNoTilt(kFALSE)
- ,fHBackfit(NULL)
- ,fHClSearch(NULL)
- ,fHRefit(NULL)
- ,fHX(NULL)
- ,fHNCl(NULL)
- ,fHNClTrack(NULL)
- ,fHMinYPos(NULL)
- ,fHMinYNeg(NULL)
- ,fHMinZ(NULL)
- ,fHMinD(NULL)
- ,fHDeltaX(NULL)
- ,fHXCl(NULL)
- ,fDebugStreamer(0)
-{
- //
- // Main constructor
- //
-
- TDirectory *savedir = gDirectory;
-
- fGeom = new AliTRDgeometry();
-
- for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
- Int_t trS = geomS;
- fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
- }
-
- AliTRDpadPlane *padPlane = fGeom->GetPadPlane(0,0);
- Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
- if (tiltAngle < 0.1) {
- fNoTilt = kTRUE;
- }
-
- if (!AliTRDcalibDB::Instance()) {
- AliFatal("Could not get calibration object");
- }
- fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBinsDCS();
-
- fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
-
- savedir->cd();
-
- InitLogHists();
-
-}
-
-//_____________________________________________________________________________
-AliTRDtracker::~AliTRDtracker()
-{
- //
- // Destructor of AliTRDtracker
- //
-
- if (fClusters) {
- fClusters->Delete();
- delete fClusters;
- }
-
- if (fTracks) {
- fTracks->Delete();
- delete fTracks;
- }
-
- if (fSeeds) {
- fSeeds->Delete();
- delete fSeeds;
- }
-
- if (fGeom) {
- delete fGeom;
- }
-
- for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
- delete fTrSec[geomS];
- }
-
- if (fDebugStreamer) {
- delete fDebugStreamer;
- }
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
-{
- //
- // Transform internal TRD ID to global detector ID
- //
-
- Int_t isector = fGeom->GetSector(lid);
- Int_t istack = fGeom->GetStack(lid);
- Int_t ilayer = fGeom->GetLayer(lid);
-
- AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
- switch (ilayer) {
- 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 = isector * fGeom->Nstack() + istack;
- UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,modId);
-
- return volid;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
-{
- //
- // Transform global detector ID to local detector ID
- //
-
- Int_t modId = 0;
- AliGeomManager::ELayerID layerId = AliGeomManager::VolUIDToLayer(gid,modId);
-
- Int_t isector = modId / fGeom->Nstack();
- Int_t istack = modId % fGeom->Nstack();
- Int_t iLayer = -1;
-
- switch (layerId) {
- case AliGeomManager::kTRD1:
- iLayer = 0;
- break;
- case AliGeomManager::kTRD2:
- iLayer = 1;
- break;
- case AliGeomManager::kTRD3:
- iLayer = 2;
- break;
- case AliGeomManager::kTRD4:
- iLayer = 3;
- break;
- case AliGeomManager::kTRD5:
- iLayer = 4;
- break;
- case AliGeomManager::kTRD6:
- iLayer = 5;
- break;
- default:
- iLayer =-1;
- }
-
- if (iLayer < 0) {
- return -1;
- }
-
- Int_t lid = fGeom->GetDetector(iLayer,istack,isector);
-
- return lid;
-
-}
-
-//_____________________________________________________________________________
-Bool_t AliTRDtracker::AdjustSector(AliTRDtrack* const track) const
-{
- //
- // 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;
-
-}
-
-//_____________________________________________________________________________
-AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack * const track, Int_t plane
- , Int_t timebin, UInt_t &index)
-{
- //
- // Try to find cluster in the backup list
- //
-
- AliTRDcluster *cl =0;
- const Int_t *indexes = track->GetBackupIndexes();
-
- for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
- if (indexes[i] == 0) {
- break;
- }
- AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
- if (!cli) {
- break;
- }
- if (cli->GetLocalTimeBin() != timebin) {
- continue;
- }
- Int_t ilayer = fGeom->GetLayer(cli->GetDetector());
- if (ilayer == plane) {
- cl = cli;
- index = indexes[i];
- break;
- }
- }
-
- return cl;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::GetLastPlane(AliTRDtrack * const track)
-{
- //
- // Return last updated plane
- //
-
- Int_t lastplane = 0;
- const Int_t *indexes = track->GetBackupIndexes();
-
- for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
- AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
- if (!cli) {
- break;
- }
- Int_t ilayer = fGeom->GetLayer(cli->GetDetector());
- if (ilayer > lastplane) {
- lastplane = ilayer;
- }
- }
-
- return lastplane;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::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.
- //
-
- 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 (fReconstructor->IsSeeding()) 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
- for (Int_t iSeed = 0; iSeed < nSeed; iSeed++) {
-
- // Get the seeds in sorted sequence
- AliESDtrack *seed = event->GetTrack(index[iSeed]);
- fHBackfit->Fill(0); // All seeds
-
- // Check the seed status
- ULong_t status = seed->GetStatus();
- if ((status & AliESDtrack::kTPCout) == 0) {
- fHBackfit->Fill(1); // TPC outer edge reached
- continue;
- }
- if ((status & AliESDtrack::kTRDout) != 0) {
- fHBackfit->Fill(2); // TRD outer edge reached (does this happen ?)
- continue;
- }
-
- // Do the back prolongation
- Int_t lbl = seed->GetLabel();
- AliTRDtrack *track = new AliTRDtrack(*seed);
- track->SetSeedLabel(lbl);
- seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
- fNseeds++;
- Float_t p4 = track->GetC();
- Int_t expectedClr = FollowBackProlongation(*track);
- fHBackfit->Fill(3); // Back prolongation done
- fHX->Fill(track->GetX());
-
- if ((TMath::Abs(track->GetC() - p4) / TMath::Abs(p4) < 0.2) ||
- (track->Pt() > 0.8)) {
-
- fHBackfit->Fill(4);
-
- //
- // Make backup for back propagation
- //
-
- Int_t foundClr = track->GetNumberOfClusters();
- if (foundClr >= foundMin) {
- track->CookdEdx();
- track->CookdEdxTimBin(seed->GetID()); // A.Bercuci 25.07.07
- CookLabel(track,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) {
- //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
- if (track->GetBackupTrack()) {
- seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
- }
- isGold = kTRUE;
- //fHBackfit->Fill()
- }
-
- // 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);
- }
- }
- }
- /**/
-
- /**/
- // Debug part of tracking
- TTreeSRedirector &cstream = *fDebugStreamer;
- Int_t eventNrInFile = event->GetEventNumberInFile(); // This is most likely NOT the event number you'd like to use. It has nothing to do with the 'real' event number.
- if (fReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0) {
- if (track->GetBackupTrack()) {
- cstream << "Tracks"
- << "EventNrInFile=" << eventNrInFile
- << "ESD.=" << seed
- << "trd.=" << track
- << "trdback.=" << track->GetBackupTrack()
- << "\n";
- }
- else {
- cstream << "Tracks"
- << "EventNrInFile=" << eventNrInFile
- << "ESD.=" << seed
- << "trd.=" << track
- << "trdback.=" << track
- << "\n";
- }
- }
- /**/
-
- // Propagation to the TOF (I.Belikov)
- if (track->GetStop() == kFALSE) {
- fHBackfit->Fill(5);
-
- 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) {
- fHBackfit->Fill(6);
- delete track;
- 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) {
- fHBackfit->Fill(7);
- delete track;
- 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())) {
- fHBackfit->Fill(8);
- delete track;
- continue;
- }
- }
- else if (y < -ymax) {
- if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
- fHBackfit->Fill(9);
- delete track;
- continue;
- }
- }
-
- if (track->PropagateTo(xtof)) {
- seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
- fHBackfit->Fill(10);
-
- seed->SetNumberOfTRDslices(AliTRDCalPID::kNSlicesLQ);
- for (Int_t i = 0; i < AliTRDtrack::kNplane; i++) {
- for (Int_t j = 0; j < AliTRDCalPID::kNSlicesLQ; j++) {
- seed->SetTRDslice(track->GetPIDsignals(i,j),i,j);
- }
- seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
- }
- //seed->SetTRDtrack(new AliTRDtrack(*track));
- if (track->GetNumberOfClusters() > foundMin) {
- fHBackfit->Fill(11);
- found++;
- }
- }
- }
- else {
- fHBackfit->Fill(12);
-
- if ((track->GetNumberOfClusters() > 15) &&
- (track->GetNumberOfClusters() > 0.5*expectedClr)) {
- seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
- fHBackfit->Fill(13);
-
- //seed->SetStatus(AliESDtrack::kTRDStop);
-
- seed->SetNumberOfTRDslices(AliTRDCalPID::kNSlicesLQ);
- for (Int_t i = 0; i < AliTRDtrack::kNplane; i++) {
- for (Int_t j = 0; j <AliTRDCalPID::kNSlicesLQ; j++) {
- seed->SetTRDslice(track->GetPIDsignals(i,j),i,j);
- }
- seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
- }
- //seed->SetTRDtrack(new AliTRDtrack(*track));
- found++;
- }
- }
-
- seed->SetTRDQuality(track->StatusForTOF());
- seed->SetTRDBudget(track->GetBudget(0));
-
- fHBackfit->Fill(14);
- delete track;
- }
-
- AliInfo(Form("Number of seeds: %d",fNseeds));
- AliInfo(Form("Number of back propagated TRD tracks: %d",found));
-
- fSeeds->Clear();
- fNseeds = 0;
-
- delete [] index;
- delete [] quality;
-
- SaveLogHists();
-
- return 0;
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::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 timeBins = fTrSec[0]->GetNumberOfTimeBins();
- //Float_t foundMin = fgkMinClustersInTrack * timeBins;
- Int_t nseed = 0;
- Int_t found = 0;
- Int_t pidQ = 0;
- //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
- AliTRDtrack seed2;
-
- // Calibration fill 2D
- AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance();
- if (!calibra) {
- AliInfo("Could not get Calibra instance\n");
- }
-
- Int_t n = event->GetNumberOfTracks();
- for (Int_t i = 0; i < n; i++) {
-
- AliESDtrack *seed = event->GetTrack(i);
- new (&seed2) AliTRDtrack(*seed);
- fHRefit->Fill(0);
-
- if (seed2.GetX() < 270.0) {
- seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup); // Backup TPC track - only update
- fHRefit->Fill(1);
- continue;
- }
-
- ULong_t status = seed->GetStatus();
- if ((status & AliESDtrack::kTRDout) == 0) {
- fHRefit->Fill(2);
- continue;
- }
- if ((status & AliESDtrack::kTRDin) != 0) {
- fHRefit->Fill(3);
- continue;
- }
-
- nseed++;
- fHRefit->Fill(4);
-
- seed2.ResetCovariance(50.0);
-
- AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
- const Int_t *indexes2 = seed2.GetIndexes();
- for (Int_t l = 0; l < AliTRDtrack::kNplane;++l) {
- for (Int_t j = 0; j < AliTRDCalPID::kNSlicesLQ;j++) {
- pt->SetPIDsignals(seed2.GetPIDsignals(l,j),l,j);
- }
- pt->SetPIDTimBin(seed2.GetPIDTimBin(l),l);
- }
-
- Int_t *indexes3 = const_cast<Int_t *>(pt->GetBackupIndexes());
- for (Int_t l = 0; l < 200;++l) {
- if (indexes2[l] == 0) {
- break;
- }
- indexes3[l] = indexes2[l];
- }
-
- FollowProlongation(*pt);
- pt->CookdEdx();
- pt->CookdEdxTimBin(seed->GetID());
-
- //calculate PID methods
- pt->SetPIDMethod(AliTRDtrack::kLQ);
- pt->CookPID(pidQ);
- seed->SetTRDpid(pt->GetPID());
- seed->SetTRDntracklets(pidQ<<3);
-
- // update calibration
- if(calibra->GetHisto2d()) calibra->UpdateHistograms(pt);
- found++;
-
- Double_t xTPC = 250.0;
- if (PropagateToX(*pt,xTPC,fgkMaxStep)) {
- seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
- fHRefit->Fill(5);
-
- for (Int_t l = 0; l < AliTRDtrack::kNplane; ++l) {
- for (Int_t j = 0; j < AliTRDCalPID::kNSlicesLQ; j++) {
- seed->SetTRDslice(pt->GetPIDsignals(l,j),l,j);
- }
- seed->SetTRDTimBin(pt->GetPIDTimBin(l),l);
- }
- } else {
- // If not prolongation to TPC - propagate without update
- fHRefit->Fill(5);
- AliTRDtrack *seed2t = new AliTRDtrack(*seed);
- seed2t->ResetCovariance(5.0);
- AliTRDtrack *pt2 = new AliTRDtrack(*seed2t,seed2t->GetAlpha());
- delete seed2t;
-
- if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
- pt2->CookdEdx();
- pt2->CookdEdxTimBin(seed->GetID());
- seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
- fHRefit->Fill(6);
-
- for (Int_t l = 0; l < AliTRDtrack::kNplane; ++l) {
- for (Int_t j = 0; j < AliTRDCalPID::kNSlicesLQ; j++) {
- seed->SetTRDslice(pt2->GetPIDsignals(l,j),l,j);
- }
- seed->SetTRDTimBin(pt2->GetPIDTimBin(l),l);
- }
- }
-
- // Add TRD track to ESDfriendTrack - maybe this tracks are
- // not useful for post-processing - TODO make decision
- if (fReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0) {
- seed->AddCalibObject(new AliTRDtrack(*pt2/*, kTRUE*/));
- }
- delete pt2;
-
- }
-
- // Add TRD track to ESDfriendTrack
- if (fReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0) {
- seed->AddCalibObject(new AliTRDtrack(*pt/*, kTRUE*/));
- }
- delete pt;
-
- }
-
- AliInfo(Form("Number of loaded seeds: %d",nseed));
- AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
-
- SaveLogHists();
-
- return 0;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
-{
- //
- // Starting from current position on track=t this function tries
- // to extrapolate the track up to timeBin=0 and to confirm prolongation
- // if a close cluster is found. Returns the number of clusters
- // expected to be found in sensitive layers
- // GeoManager used to estimate mean density
- //
-
- Int_t sector;
- Int_t lastplane = GetLastPlane(&t);
- Double_t xx0 = 0.0;
- Double_t xrho= 0.0;
- Int_t expectedNumberOfClusters = 0;
-
- for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
-
- Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
- Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
-
- // Propagate track close to the plane if neccessary
- Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
- if (currentx < (-fgkMaxStep + t.GetX())) {
- // Propagate closer to chamber - safety space fgkMaxStep
- if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) {
- break;
- }
- }
-
- if (!AdjustSector(&t)) {
- break;
- }
-
- // Get material budget
- Double_t xyz0[3];
- Double_t xyz1[3];
- Double_t param[7];
- Double_t x;
- Double_t y;
- Double_t z;
-
- // Starting global position
- t.GetXYZ(xyz0);
- // End global position
- x = fTrSec[0]->GetLayer(row0)->GetX();
- if (!t.GetProlongation(x,y,z)) {
- break;
- }
- 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;
- AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
- xrho= param[0]*param[4];
- xx0 = param[1]; // Get mean propagation parameters
-
- // Flags for marking the track momentum and direction. The track is
- // marked only if it has at least 1 cluster picked up in the current
- // chamber.
- Bool_t kUPDATED = kFALSE;
- Bool_t kMARKED = kFALSE;
-
- // Propagate and update
- sector = t.GetSector();
- //for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
- for (Int_t itime = 0 ; itime < GetTimeBinsPerPlane(); itime++) {
-
- // Mark track kinematics
- if (itime > 10 && kUPDATED && !kMARKED) {
- t.SetTrackSegmentDirMom(iplane);
- kMARKED = kTRUE;
- }
-
- Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
- expectedNumberOfClusters++;
- t.SetNExpected(t.GetNExpected() + 1);
- if (t.GetX() > 345.0) {
- t.SetNExpectedLast(t.GetNExpectedLast() + 1);
- }
- AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
- AliTRDcluster *cl = 0;
- UInt_t index = 0;
- Double_t maxChi2 = fgkMaxChi2;
- x = timeBin.GetX();
-
- if (timeBin) {
-
- AliTRDcluster *cl0 = timeBin[0];
- if (!cl0) {
- // No clusters in given time bin
- continue;
- }
-
- Int_t layer = fGeom->GetLayer(cl0->GetDetector());
- if (layer > lastplane) {
- continue;
- }
-
- Int_t timebin = cl0->GetLocalTimeBin();
- AliTRDcluster *cl2 = GetCluster(&t,layer,timebin,index);
-
- if (cl2) {
- cl = cl2;
- //Double_t h01 = GetTiltFactor(cl); //I.B's fix
- //maxChi2=t.GetPredictedChi2(cl,h01);
- }
-
- if (cl) {
-
- //if (cl->GetNPads()<5)
- Double_t dxsample = timeBin.GetdX();
- t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
- Double_t h01 = GetTiltFactor(cl);
- Int_t det = cl->GetDetector();
- Int_t llayer = fGeom->GetLayer(det);
-
- if (t.GetX() > 345.0) {
- t.SetNLast(t.GetNLast() + 1);
- t.SetChi2Last(t.GetChi2Last() + maxChi2);
- }
-
- Double_t xcluster = cl->GetX();
- t.PropagateTo(xcluster,xx0,xrho);
- if (!AdjustSector(&t)) {
- break; //I.B's fix
- }
-
- maxChi2 = t.GetPredictedChi2(cl,h01);
- if (maxChi2 < 1e+10) {
- if (!t.UpdateMI(cl,maxChi2,index,h01,llayer)) {
- // ????
- }
- else {
- //SetCluster(cl, GetNumberOfClusters()-1);
- kUPDATED = kTRUE;
- }
- }
-
- }
-
- }
-
- }
-
- }
-
- return expectedNumberOfClusters;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack &t)
-{
- //
- // Starting from current radial position of track <t> this function
- // extrapolates the track up to the outer timebin and in the sensitive
- // layers confirms prolongation if a close cluster is found.
- // Returns the number of clusters expected to be found in sensitive layers
- // Uses the geomanager for material description
- //
- // return number of assigned clusters ?
- //
-
- Int_t sector;
-
- Double_t xx0 = 0.0;
- Double_t xrho = 0.0;
-
- Float_t ratio0 = 0.0;
-
- Int_t expectedNumberOfClusters = 0;
-
- AliTRDtracklet tracklet;
-
- const Int_t kNclusters = 1000;
- Int_t clusters[kNclusters];
- for (Int_t i = 0; i < kNclusters; i++) {
- clusters[i] = -1;
- }
-
-// // Calibration fill 2D
-// AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance();
-// if (!calibra) {
-// AliInfo("Could not get Calibra instance\n");
-// }
-// if (calibra->GetMITracking()) {
-// calibra->ResetTrack();
-// }
-
- // Loop through the TRD planes
- for (Int_t iplane = 0; iplane < AliTRDtrack::kNplane; iplane++) {
-
- Int_t hb = iplane * 10;
- fHClSearch->Fill(hb);
-
- // Get the global time bin numbers for the first an last
- // local time bin of the given plane
- Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
- Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
-
- // Get the X coordinates of the propagation layer for the first time bin
- Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
- if (currentx < t.GetX()) {
- fHClSearch->Fill(hb+1);
- continue;
- }
-
- // Propagate closer to the current chamber if neccessary
- if (currentx > (fgkMaxStep + t.GetX())) {
- if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) {
- fHClSearch->Fill(hb+2);
- break;
- }
- }
-
- // Rotate track to adjacent sector if neccessary
- if (!AdjustSector(&t)) {
- fHClSearch->Fill(hb+3);
- break;
- }
-
- // Check whether azimuthal angle is getting too large
- if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) {
- fHClSearch->Fill(hb+4);
- break;
- }
-
- Double_t xyz0[3];
- Double_t xyz1[3];
- Double_t param[7];
- Double_t x;
- Double_t y;
- Double_t z;
- // Global start position (beginning of chamber)
- t.GetXYZ(xyz0);
- // X-position of the end of the chamber
- x = fTrSec[0]->GetLayer(rowlast)->GetX();
- // Get local Y and Z at the X-position of the end of the chamber
- if (!t.GetProlongation(x,y,z)) {
- fHClSearch->Fill(hb+5);
- break;
- }
- // Global end position (end of chamber)
- 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 along the path inside the chamber
- AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
- // The mean propagation parameters (density*length and radiation length)
- xrho = param[0]*param[4];
- xx0 = param[1];
-
- // Find the clusters and tracklet along the path inside the chamber
- sector = t.GetSector();
- Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
- fHNCl->Fill(tracklet.GetN());
-
- // Discard if in less than 1/3 of the available timebins
- // clusters are found
- if (tracklet.GetN() < GetTimeBinsPerPlane()/3) {
- fHClSearch->Fill(hb+6);
- continue;
- }
-
- //
- // Propagate and update track
- //
- for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
- Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
- expectedNumberOfClusters++;
- t.SetNExpected(t.GetNExpected() + 1);
- if (t.GetX() > 345.0) {
- t.SetNExpectedLast(t.GetNExpectedLast() + 1);
- }
- AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
- AliTRDcluster *cl = 0;
- UInt_t index = 0;
- Double_t maxChi2 = fgkMaxChi2;
- x = timeBin.GetX();
-
- if (timeBin) {
- if (clusters[ilayer] > 0) {
- index = clusters[ilayer];
- cl = (AliTRDcluster *)GetCluster(index);
- //Double_t h01 = GetTiltFactor(cl); // I.B's fix
- //maxChi2=t.GetPredictedChi2(cl,h01); //
- }
-
- if (cl) {
- //if (cl->GetNPads() < 5)
- Double_t dxsample = timeBin.GetdX();
- t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
- Double_t h01 = GetTiltFactor(cl);
- Int_t det = cl->GetDetector();
- Int_t layer = fGeom->GetLayer(det);
- if (t.GetX() > 345.0) {
- t.SetNLast(t.GetNLast() + 1);
- t.SetChi2Last(t.GetChi2Last() + maxChi2);
- }
- Double_t xcluster = cl->GetX();
- t.PropagateTo(xcluster,xx0,xrho);
- maxChi2 = t.GetPredictedChi2(cl,h01);
-
- if (maxChi2<1e+10)
- if (!t.UpdateMI(cl,maxChi2,index,h01,layer)) {
- if (!t.Update(cl,maxChi2,index,h01)) {
- // ????
- }
- } // else SetCluster(cl, GetNumberOfClusters()-1); // A.Bercuci 25.07.07
-
-
-// if (calibra->GetMITracking()) {
-// calibra->UpdateHistograms(cl,&t);
-// }
-
- // Reset material budget if 2 consecutive gold
- if (layer > 0) {
- if ((t.GetTracklets(layer).GetN() + t.GetTracklets(layer-1).GetN()) > 20) {
- t.SetBudget(2,0.0);
- }
- }
-
- }
-
- }
-
- }
-
- ratio0 = ncl / Float_t(fTimeBinsPerPlane);
- Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
- if ((tracklet.GetChi2() < 18.0) &&
- (ratio0 > 0.8) &&
- (ratio1 > 0.6) &&
- (ratio0+ratio1 > 1.5) &&
- (t.GetNCross() == 0) &&
- (TMath::Abs(t.GetSnp()) < 0.85) &&
- (t.GetNumberOfClusters() > 20)){
- //if (ratio0 > 0.8) {
- t.MakeBackupTrack(); // Make backup of the track until is gold
- }
-
- }
-
- return expectedNumberOfClusters;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::PropagateToX(AliTRDtrack &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 AliTRDtracker::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();
- fNclusters = ncl;
- AliInfo(Form("Sorting %d clusters",ncl));
-
- UInt_t index;
- while (ncl--) {
-
- AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
- Int_t detector = c->GetDetector();
- Int_t localTimeBin = c->GetLocalTimeBin();
- Int_t sector = fGeom->GetSector(detector);
- Int_t layer = fGeom->GetLayer(detector);
- Int_t trackingSector = sector;
-
- //if (c->GetQ() > 10) {
- // Int_t stack = fGeom->GetStack(detector);
- //}
-
- Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(layer,localTimeBin);
- if (gtb < 0) {
- continue;
- }
- Int_t trLayer = fTrSec[trackingSector]->GetLayerNumber(gtb);
-
- index = ncl;
-
- fHXCl->Fill(c->GetX());
-
- fTrSec[trackingSector]->GetLayer(trLayer)->SetX(c->GetX());
- fTrSec[trackingSector]->GetLayer(trLayer)->InsertCluster(c,index);
-
- }
-
- return 0;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDtracker::UnloadClusters()
-{
- //
- // Clears the arrays of clusters and tracks. Resets sectors and timebins
- //
-
- Int_t i;
- Int_t nentr;
-
- nentr = fClusters->GetEntriesFast();
- for (i = 0; i < nentr; i++) {
- delete fClusters->RemoveAt(i);
- }
- fNclusters = 0;
-
- nentr = fSeeds->GetEntriesFast();
- for (i = 0; i < nentr; i++) {
- delete fSeeds->RemoveAt(i);
- }
-
- nentr = fTracks->GetEntriesFast();
- for (i = 0; i < nentr; i++) {
- delete fTracks->RemoveAt(i);
- }
-
- Int_t nsec = AliTRDgeometry::kNsector;
- for (i = 0; i < nsec; i++) {
- for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
- fTrSec[i]->GetLayer(pl)->Clear();
- }
- }
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::Clusters2Tracks(AliESDEvent *esd)
-{
- //
- // Creates seeds using clusters between position inner plane and outer plane
- //
-
- const Double_t kMaxTheta = 1.0;
- const Double_t kMaxPhi = 2.0;
-
- const Double_t kRoad0y = 6.0; // Road for middle cluster
- const Double_t kRoad0z = 8.5; // Road for middle cluster
-
- const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
- const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
-
- const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
- const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
- const Int_t kMaxSeed = 3000;
-
- Int_t maxSec = AliTRDgeometry::kNsector;
-
- // Linear fitters in planes
- TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
- TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
- fitterTC.StoreData(kTRUE);
- fitterT2.StoreData(kTRUE);
- AliRieman rieman(1000); // Rieman fitter
- AliRieman rieman2(1000); // Rieman fitter
-
- // Find the maximal and minimal layer for the planes
- Int_t layers[6][2];
- AliTRDpropagationLayer *reflayers[6];
- for (Int_t i = 0; i < 6; i++) {
- layers[i][0] = 10000;
- layers[i][1] = 0;
- }
- for (Int_t ns = 0; ns < maxSec; ns++) {
- for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
- AliTRDpropagationLayer &propLayer = *(fTrSec[ns]->GetLayer(ilayer));
- if (propLayer == 0) {
- continue;
- }
- Int_t det = propLayer[0]->GetDetector();
- Int_t layer = fGeom->GetLayer(det);
- if (ilayer < layers[layer][0]) {
- layers[layer][0] = ilayer;
- }
- if (ilayer > layers[layer][1]) {
- layers[layer][1] = ilayer;
- }
- }
- }
-
- AliTRDpadPlane *padPlane = fGeom->GetPadPlane(0,0);
- Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
- Double_t hL[6]; // Tilting angle
- Double_t xcl[6]; // X - position of reference cluster
- Double_t ycl[6]; // Y - position of reference cluster
- Double_t zcl[6]; // Z - position of reference cluster
-
- AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
- Float_t padlength[6] = { 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 }; // Current pad-length
-
- Double_t chi2R = 0.0;
- Double_t chi2Z = 0.0;
- Double_t chi2RF = 0.0;
- Double_t chi2ZF = 0.0;
-
- Int_t nclusters; // Total number of clusters
- for (Int_t i = 0; i < 6; i++) {
- hL[i] = h01;
- if (i%2==1) {
- hL[i]*=-1.0;
- }
- }
-
- // Registered seed
- AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
- AliTRDseed *seed[kMaxSeed];
- for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
- seed[iseed]= &pseed[iseed*6];
- }
- AliTRDseed *cseed = seed[0];
-
- Double_t seedquality[kMaxSeed];
- Double_t seedquality2[kMaxSeed];
- Double_t seedparams[kMaxSeed][7];
- Int_t seedlayer[kMaxSeed];
- Int_t registered = 0;
- Int_t sort[kMaxSeed];
-
- //
- // Seeding part
- //
- for (Int_t ns = 0; ns < maxSec; ns++) { // Loop over sectors
- //for (Int_t ns = 0; ns < 5; ns++) { // Loop over sectors
-
- registered = 0; // Reset registerd seed counter
- cseed = seed[registered];
- Float_t iter = 0.0;
-
- for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
- //for (Int_t dseed = 5; dseed < 15; dseed += 3) {
-
- iter += 1.0;
- Int_t dseed = 5 + Int_t(iter) * 3;
-
- // Initialize seeding layers
- for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
- reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
- xcl[ilayer] = reflayers[ilayer]->GetX();
- }
-
- Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
- AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
- AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
- AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
- AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
-
- Int_t maxn3 = layer3;
- for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
-
- AliTRDcluster *cl3 = layer3[icl3];
- if (!cl3) {
- continue;
- }
- padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2() * 12.0);
- ycl[sLayer+3] = cl3->GetY();
- zcl[sLayer+3] = cl3->GetZ();
- Float_t yymin0 = ycl[sLayer+3] - 1.0 - kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
- Float_t yymax0 = ycl[sLayer+3] + 1.0 + kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
- Int_t maxn0 = layer0;
-
- for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
-
- AliTRDcluster *cl0 = layer0[icl0];
- if (!cl0) {
- continue;
- }
- if (cl3->IsUsed() && cl0->IsUsed()) {
- continue;
- }
- ycl[sLayer+0] = cl0->GetY();
- zcl[sLayer+0] = cl0->GetZ();
- if (ycl[sLayer+0] > yymax0) {
- break;
- }
- Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
- if (TMath::Abs(tanphi) > kMaxPhi) {
- continue;
- }
- Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
- if (TMath::Abs(tantheta) > kMaxTheta) {
- continue;
- }
- padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2() * 12.0);
-
- // Expected position in 1 layer
- Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1]-xcl[sLayer+0]);
- Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1]-xcl[sLayer+0]);
- Float_t yymin1 = y1exp - kRoad0y - tanphi;
- Float_t yymax1 = y1exp + kRoad0y + tanphi;
- Int_t maxn1 = layer1;
-
- for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
-
- AliTRDcluster *cl1 = layer1[icl1];
- if (!cl1) {
- continue;
- }
- Int_t nusedCl = 0;
- if (cl3->IsUsed()) nusedCl++;
- if (cl0->IsUsed()) nusedCl++;
- if (cl1->IsUsed()) nusedCl++;
- if (nusedCl > 1) {
- continue;
- }
- ycl[sLayer+1] = cl1->GetY();
- zcl[sLayer+1] = cl1->GetZ();
- if (ycl[sLayer+1] > yymax1) {
- break;
- }
- if (TMath::Abs(ycl[sLayer+1]-y1exp) > kRoad0y+tanphi) {
- continue;
- }
- if (TMath::Abs(zcl[sLayer+1]-z1exp) > kRoad0z) {
- continue;
- }
- padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2() * 12.0);
-
- Double_t y2exp = ycl[sLayer+0]+(tanphi) * (xcl[sLayer+2]-xcl[sLayer+0]) + (ycl[sLayer+1]-y1exp);
- Double_t z2exp = zcl[sLayer+0]+(tantheta) * (xcl[sLayer+2]-xcl[sLayer+0]);
- Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
- if (index2 <= 0) {
- continue;
- }
- AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
- padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2() * 12.0);
- ycl[sLayer+2] = cl2->GetY();
- zcl[sLayer+2] = cl2->GetZ();
- if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) {
- continue;
- }
-
- rieman.Reset();
- rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
- rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
- rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
- rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
- rieman.Update();
-
- // Reset fitter
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- cseed[iLayer].Reset();
- }
- chi2Z = 0.0;
- chi2R = 0.0;
-
- for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
- cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
- chi2Z += (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer])
- * (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer]);
- cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
- cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
- chi2R += (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer])
- * (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer]);
- cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
- }
- if (TMath::Sqrt(chi2R) > 1.0/iter) {
- continue;
- }
- if (TMath::Sqrt(chi2Z) > 7.0/iter) {
- continue;
- }
-
- Float_t minmax[2] = { -100.0, 100.0 };
- for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
- Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer] * 0.5
- + 1.0 - cseed[sLayer+iLayer].GetZref(0);
- if (max < minmax[1]) {
- minmax[1] = max;
- }
- Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer] * 0.5
- - 1.0 - cseed[sLayer+iLayer].GetZref(0);
- if (min > minmax[0]) {
- minmax[0] = min;
- }
- }
-
- Bool_t isFake = kFALSE;
- if (cl0->GetLabel(0) != cl3->GetLabel(0)) {
- isFake = kTRUE;
- }
- if (cl1->GetLabel(0) != cl3->GetLabel(0)) {
- isFake = kTRUE;
- }
- if (cl2->GetLabel(0) != cl3->GetLabel(0)) {
- isFake = kTRUE;
- }
-
- if (fReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0) {
- if ((!isFake) || ((icl3%10) == 0)) { // Debugging print
- TTreeSRedirector &cstream = *fDebugStreamer;
- cstream << "Seeds0"
- << "isFake=" << isFake
- << "Cl0.=" << cl0
- << "Cl1.=" << cl1
- << "Cl2.=" << cl2
- << "Cl3.=" << cl3
- << "Xref=" << xref
- << "X0=" << xcl[sLayer+0]
- << "X1=" << xcl[sLayer+1]
- << "X2=" << xcl[sLayer+2]
- << "X3=" << xcl[sLayer+3]
- << "Y2exp=" << y2exp
- << "Z2exp=" << z2exp
- << "Chi2R=" << chi2R
- << "Chi2Z=" << chi2Z
- << "Seed0.=" << &cseed[sLayer+0]
- << "Seed1.=" << &cseed[sLayer+1]
- << "Seed2.=" << &cseed[sLayer+2]
- << "Seed3.=" << &cseed[sLayer+3]
- << "Zmin=" << minmax[0]
- << "Zmax=" << minmax[1]
- << "\n";
- }
- }
-
- ////////////////////////////////////////////////////////////////////////////////////
- //
- // Fit seeding part
- //
- ////////////////////////////////////////////////////////////////////////////////////
-
- cl[sLayer+0] = cl0;
- cl[sLayer+1] = cl1;
- cl[sLayer+2] = cl2;
- cl[sLayer+3] = cl3;
- Bool_t isOK = kTRUE;
-
- for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
-
- cseed[sLayer+jLayer].SetTilt(hL[sLayer+jLayer]);
- cseed[sLayer+jLayer].SetPadLength(padlength[sLayer+jLayer]);
- cseed[sLayer+jLayer].SetX0(xcl[sLayer+jLayer]);
-
- for (Int_t jter = 0; jter < 2; jter++) {
-
- //
- // In iteration 0 we try only one pad-row
- // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
- //
- AliTRDseed tseed = cseed[sLayer+jLayer];
- Float_t roadz = padlength[sLayer+jLayer] * 0.5;
- if (jter > 0) {
- roadz = padlength[sLayer+jLayer];
- }
-
- Float_t quality = 10000.0;
-
- for (Int_t iTime = 2; iTime < 20; iTime++) {
-
- AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
- Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
- Double_t zexp = cl[sLayer+jLayer]->GetZ();
-
- if (jter > 0) {
- // Try 2 pad-rows in second iteration
- zexp = tseed.GetZref(0) + tseed.GetZref(1) * dxlayer;
- if (zexp > cl[sLayer+jLayer]->GetZ()) {
- zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer]*0.5;
- }
- if (zexp < cl[sLayer+jLayer]->GetZ()) {
- zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer]*0.5;
- }
- }
-
- Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
- Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
- if (index <= 0) {
- continue;
- }
- AliTRDcluster *clu = (AliTRDcluster *) GetCluster(index);
-
- tseed.SetIndexes(iTime,index);
- tseed.SetClusters(iTime,clu); // Register cluster
- tseed.SetX(iTime,dxlayer); // Register cluster
- tseed.SetY(iTime,clu->GetY()); // Register cluster
- tseed.SetZ(iTime,clu->GetZ()); // Register cluster
-
- }
-
- tseed.Update();
-
- // Count the number of clusters and distortions into quality
- Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
- Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
- + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
- + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
- if ((jter == 0) && tseed.IsOK()) {
- cseed[sLayer+jLayer] = tseed;
- quality = tquality;
- if (tquality < 5) {
- break;
- }
- }
- if (tseed.IsOK() && (tquality < quality)) {
- cseed[sLayer+jLayer] = tseed;
- }
-
- } // Loop: jter
-
- if (!cseed[sLayer+jLayer].IsOK()) {
- isOK = kFALSE;
- break;
- }
-
- cseed[sLayer+jLayer].CookLabels();
- cseed[sLayer+jLayer].UpdateUsed();
- nusedCl += cseed[sLayer+jLayer].GetNUsed();
- if (nusedCl > 25) {
- isOK = kFALSE;
- break;
- }
-
- } // Loop: jLayer
-
- if (!isOK) {
- continue;
- }
- nclusters = 0;
- for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
- if (cseed[sLayer+iLayer].IsOK()) {
- nclusters += cseed[sLayer+iLayer].GetN2();
- }
- }
-
- // Iteration 0
- rieman.Reset();
- for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
- rieman.AddPoint(xcl[sLayer+iLayer]
- ,cseed[sLayer+iLayer].GetYfitR(0)
- ,cseed[sLayer+iLayer].GetZProb()
- ,1
- ,10);
- }
- rieman.Update();
-
- chi2R = 0.0;
- chi2Z = 0.0;
-
- for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
- cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
- chi2R += (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0))
- * (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0));
- cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
- cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
- chi2Z += (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz())
- * (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz());
- cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
- }
- Double_t curv = rieman.GetC();
-
- //
- // Likelihoods
- //
- Double_t sumda = TMath::Abs(cseed[sLayer+0].GetYfitR(1) - cseed[sLayer+0].GetYref(1))
- + TMath::Abs(cseed[sLayer+1].GetYfitR(1) - cseed[sLayer+1].GetYref(1))
- + TMath::Abs(cseed[sLayer+2].GetYfitR(1) - cseed[sLayer+2].GetYref(1))
- + TMath::Abs(cseed[sLayer+3].GetYfitR(1) - cseed[sLayer+3].GetYref(1));
- Double_t likea = TMath::Exp(-sumda*10.6);
- Double_t likechi2 = 0.0000000001;
- if (chi2R < 0.5) {
- likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
- }
- Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
- Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
- Double_t like = likea * likechi2 * likechi2z * likeN;
- Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetYref(1) - 130.0*curv) * 1.9);
- Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetZref(1)
- - cseed[sLayer+0].GetZref(0) / xcl[sLayer+0]) * 5.9);
- Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
-
- seedquality[registered] = like;
- seedlayer[registered] = sLayer;
- if (TMath::Log(0.000000000000001 + like) < -15) {
- continue;
- }
- AliTRDseed seedb[6];
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- seedb[iLayer] = cseed[iLayer];
- }
-
- ////////////////////////////////////////////////////////////////////////////////////
- //
- // Full track fit part
- //
- ////////////////////////////////////////////////////////////////////////////////////
-
- Int_t nlayers = 0;
- Int_t nusedf = 0;
- Int_t findable = 0;
-
- //
- // Add new layers - avoid long extrapolation
- //
- Int_t tLayer[2] = { 0, 0 };
- if (sLayer == 2) {
- tLayer[0] = 1;
- tLayer[1] = 0;
- }
- if (sLayer == 1) {
- tLayer[0] = 5;
- tLayer[1] = 0;
- }
- if (sLayer == 0) {
- tLayer[0] = 4;
- tLayer[1] = 5;
- }
-
- for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
- Int_t jLayer = tLayer[iLayer]; // Set tracking layer
- cseed[jLayer].Reset();
- cseed[jLayer].SetTilt(hL[jLayer]);
- cseed[jLayer].SetPadLength(padlength[jLayer]);
- cseed[jLayer].SetX0(xcl[jLayer]);
- // Get pad length and rough cluster
- Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].GetYref(0)
- ,cseed[jLayer].GetZref(0)
- ,kRoad2y
- ,kRoad2z);
- if (indexdummy <= 0) {
- continue;
- }
- AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
- padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
- }
- AliTRDseed::FitRiemanTilt(cseed,kTRUE);
-
- for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
-
- Int_t jLayer = tLayer[iLayer]; // set tracking layer
- if ((jLayer == 0) && !(cseed[1].IsOK())) {
- continue; // break not allowed
- }
- if ((jLayer == 5) && !(cseed[4].IsOK())) {
- continue; // break not allowed
- }
- Float_t zexp = cseed[jLayer].GetZref(0);
- Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
-
- for (Int_t jter = 0; jter < 2; jter++) {
-
- AliTRDseed tseed = cseed[jLayer];
- Float_t quality = 10000.0;
-
- for (Int_t iTime = 2; iTime < 20; iTime++) {
- AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
- Double_t dxlayer = layer.GetX()-xcl[jLayer];
- Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
- Float_t yroad = kRoad1y;
- Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
- if (index <= 0) {
- continue;
- }
- AliTRDcluster *clu = (AliTRDcluster *) GetCluster(index);
- tseed.SetIndexes(iTime,index);
- tseed.SetClusters(iTime,clu); // Register cluster
- tseed.SetX(iTime,dxlayer); // Register cluster
- tseed.SetY(iTime,clu->GetY()); // Register cluster
- tseed.SetZ(iTime,clu->GetZ()); // Register cluster
- }
-
- tseed.Update();
- if (tseed.IsOK()) {
- Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
- Float_t tquality = (18.0 - tseed.GetN2())/2.0 + TMath::Abs(dangle) / 0.1
- + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
- + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
- if (tquality < quality) {
- cseed[jLayer] = tseed;
- quality = tquality;
- }
- }
-
- zroad *= 2.0;
-
- } // Loop: jter
-
- if ( cseed[jLayer].IsOK()) {
- cseed[jLayer].CookLabels();
- cseed[jLayer].UpdateUsed();
- nusedf += cseed[jLayer].GetNUsed();
- AliTRDseed::FitRiemanTilt(cseed,kTRUE);
- }
-
- } // Loop: iLayer
-
- // Make copy
- AliTRDseed bseed[6];
- 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 jter = 0; jter < 4; jter++) {
-
- // Sort tracklets according "quality", try to "improve" 4 worst
- Float_t sumquality = 0.0;
- Float_t squality[6];
- Int_t sortindexes[6];
-
- for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
- if (bseed[jLayer].IsOK()) {
- AliTRDseed &tseed = bseed[jLayer];
- Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
- Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
- Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
- + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
- + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
- squality[jLayer] = tquality;
- }
- else {
- squality[jLayer] = -1.0;
- }
- sumquality +=squality[jLayer];
- }
-
- if ((sumquality >= lastquality) ||
- (chi2 > lastchi2)) {
- break;
- }
- lastquality = sumquality;
- lastchi2 = chi2;
- if (jter > 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];
- AliTRDseed tseed = bseed[bLayer];
-
- for (Int_t iTime = 2; iTime < 20; iTime++) {
-
- AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
- Double_t dxlayer = layer.GetX() - xcl[bLayer];
- Double_t zexp = tseed.GetZref(0);
- Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
- Float_t roadz = padlength[bLayer] + 1;
- if (TMath::Abs(tseed.GetZProb() - zexp) > 0.5*padlength[bLayer]) {
- roadz = padlength[bLayer] * 0.5;
- }
- if (tseed.GetZfit(1)*tseed.GetZref(1) < 0.0) {
- roadz = padlength[bLayer] * 0.5;
- }
- if (TMath::Abs(tseed.GetZProb() - zexp) < 0.1*padlength[bLayer]) {
- zexp = tseed.GetZProb();
- roadz = padlength[bLayer] * 0.5;
- }
-
- Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer - zcor;
- Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
- if (index <= 0) {
- continue;
- }
- AliTRDcluster *clu = (AliTRDcluster *) GetCluster(index);
-
- tseed.SetIndexes(iTime,index);
- tseed.SetClusters(iTime,clu); // Register cluster
- tseed.SetX(iTime,dxlayer); // Register cluster
- tseed.SetY(iTime,clu->GetY()); // Register cluster
- tseed.SetZ(iTime,clu->GetZ()); // Register cluster
-
- }
-
- tseed.Update();
- if (tseed.IsOK()) {
- Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
- Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
- Float_t tquality = (18.0 - tseed.GetN2()) / 2.0
- + TMath::Abs(dangle) / 0.1
- + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
- + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
- if (tquality<squality[bLayer]) {
- bseed[bLayer] = tseed;
- }
- }
-
- } // Loop: jLayer
-
- chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
-
- } // Loop: jter
-
- nclusters = 0;
- nlayers = 0;
- 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()) {
- nclusters += cseed[iLayer].GetN2();
- nlayers++;
- }
- }
- if (nlayers < 3) {
- continue;
- }
- rieman.Reset();
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- if (cseed[iLayer].IsOK()) {
- rieman.AddPoint(xcl[iLayer]
- ,cseed[iLayer].GetYfitR(0)
- ,cseed[iLayer].GetZProb()
- ,1
- ,10);
- }
- }
- rieman.Update();
-
- chi2RF = 0.0;
- chi2ZF = 0.0;
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- if (cseed[iLayer].IsOK()) {
- cseed[iLayer].SetYref(0,rieman.GetYat(xcl[iLayer]));
- chi2RF += (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0))
- * (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0));
- cseed[iLayer].SetYref(1,rieman.GetDYat(xcl[iLayer]));
- cseed[iLayer].SetZref(0,rieman.GetZat(xcl[iLayer]));
- chi2ZF += (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz())
- * (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz());
- cseed[iLayer].SetZref(1,rieman.GetDZat(xcl[iLayer]));
- }
- }
- chi2RF /= TMath::Max((nlayers - 3.0),1.0);
- chi2ZF /= TMath::Max((nlayers - 3.0),1.0);
- curv = rieman.GetC();
-
- Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
- Double_t dzmf = rieman.GetDZat(xref2);
- Double_t zmf = rieman.GetZat(xref2);
-
- //
- // Fit hyperplane
- //
- Int_t npointsT = 0;
- fitterTC.ClearPoints();
- fitterT2.ClearPoints();
- rieman2.Reset();
-
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
-
- if (!cseed[iLayer].IsOK()) {
- continue;
- }
-
- for (Int_t itime = 0; itime < 25; itime++) {
-
- if (!cseed[iLayer].IsUsable(itime)) {
- continue;
- }
- // X relative to the middle chamber
- Double_t x = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0() - xref2;
- Double_t y = cseed[iLayer].GetY(itime);
- Double_t z = cseed[iLayer].GetZ(itime);
- // ExB correction to the correction
- // Tilted rieman
- Double_t uvt[6];
- // Global x
- Double_t x2 = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0();
- Double_t t = 1.0 / (x2*x2 + y*y);
- uvt[1] = t; // t
- uvt[0] = 2.0 * x2 * uvt[1]; // u
- uvt[2] = 2.0 * hL[iLayer] * uvt[1];
- uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
- uvt[4] = 2.0 * (y + hL[iLayer]*z) * uvt[1];
- Double_t error = 2.0 * 0.2 * uvt[1];
- fitterT2.AddPoint(uvt,uvt[4],error);
-
- //
- // Constrained rieman
- //
- z = cseed[iLayer].GetZ(itime);
- uvt[0] = 2.0 * x2 * t; // u
- uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
- uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
- fitterTC.AddPoint(uvt,uvt[2],error);
- rieman2.AddPoint(x2,y,z,1,10);
- npointsT++;
-
- }
-
- } // Loop: iLayer
-
- rieman2.Update();
- fitterTC.Eval();
- fitterT2.Eval();
- Double_t rpolz0 = fitterT2.GetParameter(3);
- Double_t rpolz1 = fitterT2.GetParameter(4);
-
- //
- // Linear fitter - not possible to make boundaries
- // Do not accept non possible z and dzdx combinations
- //
- Bool_t acceptablez = kTRUE;
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- if (cseed[iLayer].IsOK()) {
- Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
- if (TMath::Abs(cseed[iLayer].GetZProb() - zT2) > padlength[iLayer] * 0.5 + 1.0) {
- acceptablez = kFALSE;
- }
- }
- }
- if (!acceptablez) {
- fitterT2.FixParameter(3,zmf);
- fitterT2.FixParameter(4,dzmf);
- fitterT2.Eval();
- fitterT2.ReleaseParameter(3);
- fitterT2.ReleaseParameter(4);
- rpolz0 = fitterT2.GetParameter(3);
- rpolz1 = fitterT2.GetParameter(4);
- }
-
- Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
- Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
- Double_t polz1c = fitterTC.GetParameter(2);
- Double_t polz0c = polz1c * xref2;
- Double_t aC = fitterTC.GetParameter(0);
- Double_t bC = fitterTC.GetParameter(1);
- Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
- Double_t aR = fitterT2.GetParameter(0);
- Double_t bR = fitterT2.GetParameter(1);
- Double_t dR = fitterT2.GetParameter(2);
- Double_t cR = 1.0 + bR*bR - dR*aR;
- Double_t dca = 0.0;
- if (cR > 0.0) {
- dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
- cR = aR / TMath::Sqrt(cR);
- }
-
- Double_t chi2ZT2 = 0.0;
- Double_t chi2ZTC = 0.0;
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- if (cseed[iLayer].IsOK()) {
- Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
- Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
- chi2ZT2 += TMath::Abs(cseed[iLayer].GetMeanz() - zT2);
- chi2ZTC += TMath::Abs(cseed[iLayer].GetMeanz() - zTC);
- }
- }
- chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
- chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
-
- AliTRDseed::FitRiemanTilt(cseed,kTRUE);
- Float_t sumdaf = 0.0;
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- if (cseed[iLayer].IsOK()) {
- sumdaf += TMath::Abs((cseed[iLayer].GetYfit(1) - cseed[iLayer].GetYref(1))
- / cseed[iLayer].GetSigmaY2());
- }
- }
- sumdaf /= Float_t (nlayers - 2.0);
-
- //
- // Likelihoods for full track
- //
- Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
- Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
- Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
- Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
- seedquality2[registered] = likezf * likechi2TR * likeaf;
-
- // Still needed ????
-// Bool_t isGold = kFALSE;
-//
-// if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
-// if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
-// if (isGold &&nusedf<10){
-// for (Int_t jLayer=0;jLayer<6;jLayer++){
-// if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
-// seed[index][jLayer].UseClusters(); //sign gold
-// }
-// }
-
- Int_t index0 = 0;
- if (!cseed[0].IsOK()) {
- index0 = 1;
- if (!cseed[1].IsOK()) {
- index0 = 2;
- }
- }
- seedparams[registered][0] = cseed[index0].GetX0();
- seedparams[registered][1] = cseed[index0].GetYref(0);
- seedparams[registered][2] = cseed[index0].GetZref(0);
- seedparams[registered][5] = cR;
- seedparams[registered][3] = cseed[index0].GetX0() * cR - TMath::Sin(TMath::ATan(cseed[0].GetYref(1)));
- seedparams[registered][4] = cseed[index0].GetZref(1)
- / TMath::Sqrt(1.0 + cseed[index0].GetYref(1) * cseed[index0].GetYref(1));
- seedparams[registered][6] = ns;
-
- 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(cR);
- cseed[iLayer].SetCC(cC);
- cseed[iLayer].SetChi2(chi2TR);
- cseed[iLayer].SetChi2Z(chi2ZF);
- }
-
- // Debugging print
- if (1 || (!isFake)) {
- Float_t zvertex = GetZ();
- TTreeSRedirector &cstream = *fDebugStreamer;
- if (fReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0) {
- cstream << "Seeds1"
- << "isFake=" << isFake
- << "Vertex=" << zvertex
- << "Rieman2.=" << &rieman2
- << "Rieman.=" << &rieman
- << "Xref=" << xref
- << "X0=" << xcl[0]
- << "X1=" << xcl[1]
- << "X2=" << xcl[2]
- << "X3=" << xcl[3]
- << "X4=" << xcl[4]
- << "X5=" << xcl[5]
- << "Chi2R=" << chi2R
- << "Chi2Z=" << chi2Z
- << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
- << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
- << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
- << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
- << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
- << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
- << "C=" << curv // Non constrained - no tilt correction
- << "DR=" << dR // DR parameter - tilt correction
- << "DCA=" << dca // DCA - tilt correction
- << "CR=" << cR // Non constrained curvature - tilt correction
- << "CC=" << cC // Constrained curvature
- << "Polz0=" << polz0c
- << "Polz1=" << polz1c
- << "RPolz0=" << rpolz0
- << "RPolz1=" << rpolz1
- << "Ncl=" << nclusters
- << "Nlayers=" << nlayers
- << "NUsedS=" << nusedCl
- << "NUsed=" << nusedf
- << "Findable=" << findable
- << "Like=" << like
- << "LikePrim=" << likePrim
- << "Likechi2C=" << likechi2C
- << "Likechi2TR=" << likechi2TR
- << "Likezf=" << likezf
- << "LikeF=" << seedquality2[registered]
- << "S0.=" << &cseed[0]
- << "S1.=" << &cseed[1]
- << "S2.=" << &cseed[2]
- << "S3.=" << &cseed[3]
- << "S4.=" << &cseed[4]
- << "S5.=" << &cseed[5]
- << "SB0.=" << &seedb[0]
- << "SB1.=" << &seedb[1]
- << "SB2.=" << &seedb[2]
- << "SB3.=" << &seedb[3]
- << "SB4.=" << &seedb[4]
- << "SB5.=" << &seedb[5]
- << "Label=" << label
- << "Freq=" << frequency
- << "sLayer=" << sLayer
- << "\n";
- }
- }
-
- if (registered<kMaxSeed - 1) {
- registered++;
- cseed = seed[registered];
- }
-
- } // End of loop over layer 1
-
- } // End of loop over layer 0
-
- } // End of loop over layer 3
-
- } // End of loop over seeding time bins
-
- //
- // Choose best
- //
-
- TMath::Sort(registered,seedquality2,sort,kTRUE);
- Bool_t signedseed[kMaxSeed];
- for (Int_t i = 0; i < registered; i++) {
- signedseed[i] = kFALSE;
- }
-
- for (Int_t jter = 0; jter < 5; jter++) {
-
- for (Int_t iseed = 0; iseed < registered; iseed++) {
-
- Int_t index = sort[iseed];
- if (signedseed[index]) {
- continue;
- }
- Int_t labelsall[1000];
- Int_t nlabelsall = 0;
- Int_t naccepted = 0;;
- Int_t sLayer = seedlayer[index];
- Int_t ncl = 0;
- Int_t nused = 0;
- Int_t nlayers = 0;
- Int_t findable = 0;
-
- for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
-
- if (TMath::Abs(seed[index][jLayer].GetYref(0) / xcl[jLayer]) < 0.15) {
- findable++;
- }
- if (seed[index][jLayer].IsOK()) {
- seed[index][jLayer].UpdateUsed();
- ncl +=seed[index][jLayer].GetN2();
- nused +=seed[index][jLayer].GetNUsed();
- nlayers++;
- // Cooking label
- for (Int_t itime = 0; itime < 25; itime++) {
- if (seed[index][jLayer].IsUsable(itime)) {
- naccepted++;
- for (Int_t ilab = 0; ilab < 3; ilab++) {
- Int_t tindex = seed[index][jLayer].GetClusters(itime)->GetLabel(ilab);
- if (tindex >= 0) {
- labelsall[nlabelsall] = tindex;
- nlabelsall++;
- }
- }
- }
- }
- }
-
- }
-
- if (nused > 30) {
- continue;
- }
-
- if (jter == 0) {
- if (nlayers < 6) {
- continue;
- }
- if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
- continue; // Gold
- }
- }
-
- if (jter == 1) {
- if (nlayers < findable) {
- continue;
- }
- if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) {
- continue;
- }
- }
-
- if (jter == 2) {
- if ((nlayers == findable) ||
- (nlayers == 6)) {
- continue;
- }
- if (TMath::Log(0.000000001+seedquality2[index]) < -6.0) {
- continue;
- }
- }
-
- if (jter == 3) {
- if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
- continue;
- }
- }
-
- if (jter == 4) {
- if (TMath::Log(0.000000001+seedquality2[index]) - nused/(nlayers-3.0) < -15.0) {
- continue;
- }
- }
-
- signedseed[index] = kTRUE;
-
- Int_t labels[1000];
- Int_t outlab[1000];
- Int_t nlab = 0;
- for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
- if (seed[index][iLayer].IsOK()) {
- if (seed[index][iLayer].GetLabels(0) >= 0) {
- labels[nlab] = seed[index][iLayer].GetLabels(0);
- nlab++;
- }
- if (seed[index][iLayer].GetLabels(1) >= 0) {
- labels[nlab] = seed[index][iLayer].GetLabels(1);
- 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);
- Float_t ratio = Float_t(nused) / Float_t(ncl);
- if (ratio < 0.25) {
- for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
- if ((seed[index][jLayer].IsOK()) &&
- (TMath::Abs(seed[index][jLayer].GetYfit(1) - seed[index][jLayer].GetYfit(1)) < 0.2)) {
- seed[index][jLayer].UseClusters(); // Sign gold
- }
- }
- }
-
- Int_t eventNrInFile = esd->GetEventNumberInFile(); // This is most likely NOT the event number you'd like to use. It has nothing to do with the 'real' event number.
- TTreeSRedirector &cstream = *fDebugStreamer;
-
- //
- // Register seed
- //
- AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
- AliTRDtrack dummy;
- if (!track) {
- track = &dummy;
- }
- else {
- AliESDtrack esdtrack;
- esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
- esdtrack.SetLabel(label);
- esd->AddTrack(&esdtrack);
- if (fReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0) {
- cstream << "Tracks"
- << "EventNrInFile=" << eventNrInFile
- << "ESD.=" << &esdtrack
- << "trd.=" << track
- << "trdback.=" << track
- << "\n";
- }
- }
-
- if (fReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0) {
- cstream << "Seeds2"
- << "Iter=" << jter
- << "Track.=" << track
- << "Like=" << seedquality[index]
- << "LikeF=" << seedquality2[index]
- << "S0.=" << &seed[index][0]
- << "S1.=" << &seed[index][1]
- << "S2.=" << &seed[index][2]
- << "S3.=" << &seed[index][3]
- << "S4.=" << &seed[index][4]
- << "S5.=" << &seed[index][5]
- << "Label=" << label
- << "Label1=" << label1
- << "Label2=" << label2
- << "FakeRatio=" << fakeratio
- << "Freq=" << frequency
- << "Ncl=" << ncl
- << "Nlayers=" << nlayers
- << "Findable=" << findable
- << "NUsed=" << nused
- << "sLayer=" << sLayer
- << "EventNrInFile=" << eventNrInFile
- << "\n";
- }
-
- } // Loop: iseed
-
- } // Loop: jter
-
- } // End of loop over sectors
-
- delete [] pseed;
-
- return 0;
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::ReadClusters(TObjArray *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);
-
- // Loop through all entries in the tree
- Int_t nEntries = (Int_t) clusterTree->GetEntries();
- Int_t nbytes = 0;
- AliTRDcluster *c = NULL;
- 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();
- // Loop through all TRD digits
- for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
- if(!(c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster))) continue;
- array->AddLast(c);
- //printf("Add cluster 0x%x.\n", c);
- clusterArray->RemoveAt(iCluster);
- }
-
- }
- delete clusterArray;
-
- return 0;
-
-}
-
-//_____________________________________________________________________________
-Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
-{
- //
- // Get track space point with index i
- // Origin: C.Cheshkov
- //
-
- AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
- Int_t idet = cl->GetDetector();
- Int_t isector = fGeom->GetSector(idet);
- Int_t istack = fGeom->GetStack(idet);
- Int_t ilayer = fGeom->GetLayer(idet);
- Double_t local[3];
- local[0] = GetX(isector,ilayer,cl->GetLocalTimeBin());
- local[1] = cl->GetY();
- local[2] = cl->GetZ();
- Double_t global[3];
- fGeom->RotateBack(idet,local,global);
- p.SetXYZ(global[0],global[1],global[2]);
- AliGeomManager::ELayerID iGeoLayer = AliGeomManager::kTRD1;
- switch (ilayer) {
- case 0:
- iGeoLayer = AliGeomManager::kTRD1;
- break;
- case 1:
- iGeoLayer = AliGeomManager::kTRD2;
- break;
- case 2:
- iGeoLayer = AliGeomManager::kTRD3;
- break;
- case 3:
- iGeoLayer = AliGeomManager::kTRD4;
- break;
- case 4:
- iGeoLayer = AliGeomManager::kTRD5;
- break;
- case 5:
- iGeoLayer = AliGeomManager::kTRD6;
- break;
- };
- Int_t modId = isector * fGeom->Nstack() + istack;
- UShort_t volid = AliGeomManager::LayerToVolUID(iGeoLayer,modId);
- p.SetVolumeID(volid);
-
- return kTRUE;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDtracker::CookLabel(AliKalmanTrack *pt, Float_t wrong) const
-{
- //
- // This cooks a label. Mmmmh, smells good...
- //
-
- Int_t label = 123456789;
- Int_t index;
- Int_t i;
- Int_t j;
- Int_t ncl = pt->GetNumberOfClusters();
-
- const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
-
- Bool_t labelAdded;
-
- Int_t **s = new Int_t* [kRange];
- for (i = 0; i < kRange; i++) {
- s[i] = new Int_t[2];
- }
- for (i = 0; i < kRange; i++) {
- s[i][0] = -1;
- s[i][1] = 0;
- }
-
- Int_t t0;
- Int_t t1;
- Int_t t2;
-
- for (i = 0; i < ncl; i++) {
- index = pt->GetClusterIndex(i);
- AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
- t0=c->GetLabel(0);
- t1=c->GetLabel(1);
- t2=c->GetLabel(2);
- }
-
- for (i = 0; i < ncl; i++) {
- index = pt->GetClusterIndex(i);
- AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
- for (Int_t k = 0; k < 3; k++) {
- label = c->GetLabel(k);
- labelAdded = kFALSE;
- j = 0;
- if (label >= 0) {
- while ((!labelAdded) && (j < kRange)) {
- if ((s[j][0] == label) ||
- (s[j][1] == 0)) {
- s[j][0] = label;
- s[j][1] = s[j][1] + 1;
- labelAdded = kTRUE;
- }
- j++;
- }
- }
- }
- }
-
- Int_t max = 0;
- label = -123456789;
-
- for (i = 0; i < kRange; i++) {
- if (s[i][1] > max) {
- max = s[i][1];
- label = s[i][0];
- }
- }
-
- for (i = 0; i < kRange; i++) {
- delete []s[i];
- }
-
- delete []s;
-
- if ((1.0 - Float_t(max)/ncl) > wrong) {
- label = -label;
- }
-
- pt->SetLabel(label);
-
-}
-
-//_____________________________________________________________________________
-void AliTRDtracker::UseClusters(const AliKalmanTrack *t, Int_t from) const
-{
- //
- // Use clusters, but don't abuse them!
- //
-
- const Float_t kmaxchi2 = 18;
- const Float_t kmincl = 10;
-
- AliTRDtrack *track = (AliTRDtrack *) t;
-
- Int_t ncl = t->GetNumberOfClusters();
- for (Int_t i = from; i < ncl; i++) {
- Int_t index = t->GetClusterIndex(i);
- AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
- Int_t ilayer = fGeom->GetLayer(c->GetDetector());
- if (track->GetTracklets(ilayer).GetChi2() > kmaxchi2) {
- continue;
- }
- if (track->GetTracklets(ilayer).GetN() < kmincl) {
- continue;
- }
- if (!(c->IsUsed())) {
- c->Use();
- }
- }
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
-{
- //
- // Parametrised "expected" error of the cluster reconstruction in Y
- //
-
- Double_t s = 0.08 * 0.08;
- return s;
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
-{
- //
- // Parametrised "expected" error of the cluster reconstruction in Z
- //
-
- Double_t s = 9.0 * 9.0 / 12.0;
- return s;
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
-{
- //
- // Returns radial position which corresponds to time bin <localTB>
- // in tracking sector <sector> and plane <plane>
- //
-
- Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
- Int_t pl = fTrSec[sector]->GetLayerNumber(index);
-
- return fTrSec[sector]->GetLayer(pl)->GetX();
-
-}
-
-
-//_____________________________________________________________________________
-AliTRDtracker::AliTRDtrackingSector
- ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
- :fN(0)
- ,fGeom(geo)
- ,fGeomSector(gs)
-{
- //
- // AliTRDtrackingSector Constructor
- //
-
- AliTRDpadPlane *padPlane = 0;
- AliTRDpropagationLayer *ppl = 0;
-
- // Get holes description from geometry
- Bool_t holes[AliTRDgeometry::kNstack];
- for (Int_t istack = 0; istack < AliTRDgeometry::kNstack; istack++) {
- holes[istack] = fGeom->IsHole(0,istack,gs);
- }
-
- for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
- fTimeBinIndex[i] = -1;
- }
-
- Double_t x;
- Double_t dx;
- Double_t rho;
- Double_t radLength;
-
- // Add layers for each of the planes
- Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
- //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
-
- const Int_t kNstacks = AliTRDgeometry::Nstack();
- Int_t tbIndex;
- Double_t ymax = 0;
- Double_t ymaxsensitive = 0;
- Double_t *zc = new Double_t[kNstacks];
- Double_t *zmax = new Double_t[kNstacks];
- Double_t *zmaxsensitive = new Double_t[kNstacks];
-
- for (Int_t layer = 0; layer < AliTRDgeometry::Nlayer(); layer++) {
-
- ymax = fGeom->GetChamberWidth(layer) / 2.0;
- padPlane = fGeom->GetPadPlane(layer,0);
- ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
-
- for (Int_t st = 0; st < kNstacks; st++) {
- zmax[st] = fGeom->GetChamberLength(layer,st) / 2.0;
- Float_t pad = padPlane->GetRowSize(1);
- Float_t row0 = fGeom->GetRow0(layer,st,0);
- Int_t nPads = fGeom->GetRowMax(layer,st,0);
- zmaxsensitive[st] = Float_t(nPads) * pad / 2.0;
- zc[st] = -(pad * nPads) / 2.0 + row0;
- }
-
- AliTRDcalibDB *fCalibration = AliTRDcalibDB::Instance();
- dx = fCalibration->GetVdrift(0,0,0)
- / AliTRDCommonParam::Instance()->GetSamplingFrequency();
- rho = 0.00295 * 0.85; //????
- radLength = 11.0;
-
- Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(layer);
- //Double_t xbottom = x0 - dxDrift;
- //Double_t xtop = x0 + dxAmp;
-
- //temporary !! (A.Bercuci)
- Int_t t0 = (Int_t)fCalibration->GetT0Average(AliTRDgeometry::GetDetector(layer, 2, gs));
-
- Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBinsDCS();
- for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
-
- Double_t xlayer = iTime * dx - dxAmp;
- //if (xlayer<0) xlayer = dxAmp / 2.0;
- x = x0 - xlayer;
-
- tbIndex = CookTimeBinIndex(layer,iTime);
- ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,layer);
- ppl->SetYmax(ymax,ymaxsensitive);
- ppl->SetZ(zc,zmax,zmaxsensitive);
- ppl->SetHoles(holes);
- if(iTime == t0) ppl->SetT0();
-
- InsertLayer(ppl);
-
- }
-
- }
-
- MapTimeBinLayers();
-
- delete [] zc;
- delete [] zmax;
- delete [] zmaxsensitive;
-
-}
-
-//_____________________________________________________________________________
-AliTRDtracker::AliTRDtrackingSector
- ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
- :fN(0)
- ,fGeom(0)
- ,fGeomSector(0)
-{
- //
- // Copy constructor
- //
-
-}
-
-//_____________________________________________________________________________
-AliTRDtracker::AliTRDtrackingSector
- ::~AliTRDtrackingSector()
-{
- //
- // Destructor
- //
-
- for (Int_t i = 0; i < fN; i++) {
- delete fLayers[i];
- }
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::AliTRDtrackingSector
- ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
-{
- //
- // Depending on the digitization parameters calculates global
- // (i.e. for a whole TRD stack of 6 planes) time bin index for
- // timebin <localTB> in plane <plane>
- //
-
- Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBinsDCS();
- Int_t gtb = (plane+1) * tbPerPlane - localTB - 1;
- if (localTB < 0) {
- return -1;
- }
- if (gtb < 0) {
- return -1;
- }
-
- return gtb;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDtracker::AliTRDtrackingSector
- ::MapTimeBinLayers()
-{
- //
- // For all sensitive time bins sets corresponding layer index
- // in the array fTimeBins
- //
-
- Int_t index;
-
- for (Int_t i = 0; i < fN; i++) {
-
- index = fLayers[i]->GetTimeBinIndex();
-
- if (index < 0) {
- continue;
- }
- if (index >= (Int_t) kMaxTimeBinIndex) {
- //AliWarning(Form("Index %d exceeds allowed maximum of %d!\n"
- // ,index,kMaxTimeBinIndex-1));
- continue;
- }
-
- fTimeBinIndex[index] = i;
-
- }
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::AliTRDtrackingSector
- ::GetLayerNumber(Double_t x) const
-{
- //
- // Returns the number of time bin which in radial position is closest to <x>
- //
-
- if (x >= fLayers[fN-1]->GetX()) {
- return fN - 1;
- }
- if (x <= fLayers[ 0]->GetX()) {
- return 0;
- }
-
- Int_t b = 0;
- Int_t e = fN - 1;
- Int_t m = (b + e) / 2;
-
- for ( ; b < e; m = (b + e) / 2) {
- if (x > fLayers[m]->GetX()) {
- b = m + 1;
- }
- else {
- e = m;
- }
- }
-
- if (TMath::Abs(x - fLayers[m]->GetX()) > TMath::Abs(x - fLayers[m+1]->GetX())) {
- return m + 1;
- }
- else {
- return m;
- }
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::AliTRDtrackingSector
- ::GetInnerTimeBin() const
-{
- //
- // Returns number of the innermost SENSITIVE propagation layer
- //
-
- return GetLayerNumber(0);
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::AliTRDtrackingSector
- ::GetOuterTimeBin() const
-{
- //
- // Returns number of the outermost SENSITIVE time bin
- //
-
- return GetLayerNumber(GetNumberOfTimeBins() - 1);
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::AliTRDtrackingSector
- ::GetNumberOfTimeBins() const
-{
- //
- // Returns number of SENSITIVE time bins
- //
-
- Int_t tb;
- Int_t layer;
-
- for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
- layer = GetLayerNumber(tb);
- if (layer >= 0) {
- break;
- }
- }
-
- return tb + 1;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDtracker::AliTRDtrackingSector
- ::InsertLayer(AliTRDpropagationLayer *pl)
-{
- //
- // Insert layer <pl> in fLayers array.
- // Layers are sorted according to X coordinate.
- //
-
- if (fN == ((Int_t) kMaxLayersPerSector)) {
- //AliWarning("Too many layers !\n");
- return;
- }
-
- if (fN == 0) {
- fLayers[fN++] = pl;
- return;
- }
-
- Int_t i = Find(pl->GetX());
-
- memmove(fLayers+i+1,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
-
- fLayers[i] = pl;
- fN++;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::AliTRDtrackingSector
- ::Find(Double_t x) const
-{
- //
- // Returns index of the propagation layer nearest to X
- //
-
- if (x <= fLayers[0]->GetX()) {
- return 0;
- }
-
- if (x > fLayers[fN-1]->GetX()) {
- return fN;
- }
-
- Int_t b = 0;
- Int_t e = fN-1;
- Int_t m = (b + e) / 2;
-
- for (; b < e; m = (b + e) / 2) {
- if (x > fLayers[m]->GetX()) {
- b = m + 1;
- }
- else {
- e = m;
- }
- }
-
- return m;
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster *c)
-{
- //
- // Returns correction factor for tilted pads geometry
- //
-
- Int_t det = c->GetDetector();
- Int_t layer = fGeom->GetLayer(det);
- AliTRDpadPlane *padPlane = fGeom->GetPadPlane(layer,0);
- Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
-
- if (fNoTilt) {
- h01 = 0;
- }
-
- return h01;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
- , AliTRDtrack *track
- , Int_t *clusters
- , AliTRDtracklet &tracklet)
-{
- //
- // Try to find the nearest clusters to the track in the time bins
- // between <t0> and <t1>.
- // Also the corresponding tracklet is calculated
- // Correction coeficients - depend on TRD parameters - to be changed accordingly
- //
-
- const Int_t kN1 = 100;
- const Int_t kN2 = 10;
-
- Double_t x[kN1];
- Double_t yt[kN1];
- Double_t zt[kN1];
- Float_t zmean[kN1];
- Float_t nmean[kN1];
-
- Double_t dz[kN2][kN1];
- Double_t dy[kN2][kN1];
- Int_t indexes[kN2][kN1]; // Indexes of the clusters in the road
- Int_t best[kN2][kN1]; // Index of best matching cluster
- AliTRDcluster *cl[kN2][kN1]; // Pointers to the clusters in the road
-
- Double_t xmean = 0.0; // Reference x
- Int_t clfound = 0;
-
- // Initialize the arrays
- for (Int_t it = 0; it < kN1; it++) {
-
- x[it] = 0.0;
- yt[it] = 0.0;
- zt[it] = 0.0;
- clusters[it] = -2;
- zmean[it] = 0.0;
- nmean[it] = 0.0;
-
- for (Int_t ih = 0; ih < kN2; ih++) {
- indexes[ih][it] = -2;
- cl[ih][it] = 0;
- dz[ih][it] = -100.0;
- dy[ih][it] = -100.0;
- best[ih][it] = 0;
- }
-
- }
-
- Double_t x0 = track->GetX();
- Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
- Int_t nall = 0;
- Int_t nfound = 0;
- Double_t h01 = 0.0;
- Int_t layer = -1;
- Int_t detector = -1;
- Float_t padlength = 0.0;
-
- AliTRDtrack track2(* track);
- Float_t snpy = track->GetSnp();
- Float_t tany = TMath::Sqrt(snpy*snpy / ((1.-snpy)*(1.+snpy)));
- if (snpy < 0.0) {
- tany *= -1.0;
- }
-
- Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetSignedPt());
- Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
- Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
- if (road > 6.0) {
- road = 6.0;
- }
-
- for (Int_t it = 0; it < t1-t0; it++) {
-
- Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
- AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(it+t0));
- if (timeBin == 0) {
- continue; // No indexes1
- }
-
- Int_t maxn = timeBin;
- x[it] = timeBin.GetX();
- track2.PropagateTo(x[it]);
- yt[it] = track2.GetY();
- zt[it] = track2.GetZ();
-
- Double_t y = yt[it];
- Double_t z = zt[it];
- Double_t chi2 = 1000000.0;
- nall++;
-
- //
- // Find 2 nearest cluster at given time bin
- //
- Int_t checkPoint[4] = { 0, 0, 0, 0 };
- Double_t minY = 123456789.0;
- Double_t minD[2] = { 1.0, 1.0 };
-
- for (Int_t i = timeBin.Find(y - road); i < maxn; i++) {
-
- AliTRDcluster *c = (AliTRDcluster *) (timeBin[i]);
- h01 = GetTiltFactor(c);
- if (layer < 0) {
- Int_t det = c->GetDetector();
- layer = fGeom->GetLayer(det);
- padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
- }
-
- if (c->GetY() > (y + road)) {
- break;
- }
-
- fHDeltaX->Fill(c->GetX() - x[it]);
-
- if (TMath::Abs(c->GetY()-y) < TMath::Abs(minY)) {
- minY = c->GetY() - y;
- minD[0] = c->GetY() - y;
- minD[1] = c->GetZ() - z;
- }
-
- checkPoint[0]++;
-
- fHMinZ->Fill(c->GetZ() - z);
- if ((c->GetZ() - z) * (c->GetZ() - z) > 2 * (12.0 * sz2)) {
- continue;
- }
- checkPoint[1]++;
-
- Double_t dist = TMath::Abs(c->GetZ() - z);
- if (dist > (0.5 * padlength + 6.0 * sigmaz)) {
- continue; // 6 sigma boundary cut
- }
- checkPoint[2]++;
-
- // Sigma boundary cost function
- Double_t cost = 0.0;
- if (dist> (0.5 * padlength - sigmaz)){
- cost = (dist - 0.5*padlength) / (2.0 * sigmaz);
- if (cost > -1) {
- cost = (cost + 1.0) * (cost + 1.0);
- }
- else {
- cost = 0.0;
- }
- }
- chi2 = track2.GetPredictedChi2(c,h01) + cost;
- clfound++;
-
- if (chi2 > maxChi2[1]) {
- continue;
- }
- checkPoint[3]++;
-
- // Store the clusters in the road
- detector = c->GetDetector();
- for (Int_t ih = 2; ih < 9; ih++) {
- if (cl[ih][it] == 0) {
- cl[ih][it] = c;
- indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
- break;
- }
- }
-
- if (chi2 < maxChi2[0]) {
- maxChi2[1] = maxChi2[0];
- maxChi2[0] = chi2;
- indexes[1][it] = indexes[0][it];
- cl[1][it] = cl[0][it];
- indexes[0][it] = timeBin.GetIndex(i);
- cl[0][it] = c;
- continue;
- }
- maxChi2[1] = chi2;
- cl[1][it] = c;
- indexes[1][it] = timeBin.GetIndex(i);
-
- }
-
- for(int iCheckPoint = 0; iCheckPoint<4; iCheckPoint++) {
- fHFindCl[iCheckPoint]->Fill(checkPoint[iCheckPoint]);
- }
-
- if (checkPoint[3]) {
- if (track->GetSignedPt() > 0) {
- fHMinYPos->Fill(minY);
- }
- else {
- fHMinYNeg->Fill(minY);
- }
- fHMinD->Fill(minD[0],minD[1]);
- }
-
- if (cl[0][it]) {
- nfound++;
- xmean += x[it];
- }
-
- }
-
- if (nfound < 4) {
- return 0;
- }
- xmean /= Float_t(nfound); // Middle x
- track2.PropagateTo(xmean); // Propagate track to the center
-
- //
- // Choose one of the variants
- //
- Float_t sumz = 0.0;
- Float_t sum = 0.0;
- Double_t sumdy = 0.0;
- Double_t sumdy2 = 0.0;
- Double_t sumx = 0.0;
- Double_t sumxy = 0.0;
- Double_t sumx2 = 0.0;
- Double_t mpads = 0.0;
-
- Int_t changes[kN2];
-
- Int_t ngood[kN2];
- Int_t nbad[kN2];
-
- Double_t meanz[kN2];
- Double_t moffset[kN2]; // Mean offset
- Double_t mean[kN2]; // Mean value
- Double_t angle[kN2]; // Angle
-
- Double_t smoffset[kN2]; // Sigma of mean offset
- Double_t smean[kN2]; // Sigma of mean value
- Double_t sangle[kN2]; // Sigma of angle
- Double_t smeanangle[kN2]; // Correlation
-
- Double_t sigmas[kN2];
- Double_t tchi2s[kN2]; // Chi2s for tracklet
-
- for (Int_t it = 0; it < kN2; it++) {
-
- ngood[it] = 0;
- nbad[it] = 0;
-
- meanz[it] = 0.0;
- moffset[it] = 0.0; // Mean offset
- mean[it] = 0.0; // Mean value
- angle[it] = 0.0; // Angle
-
- smoffset[it] = 1.0e5; // Sigma of mean offset
- smean[it] = 1.0e5; // Sigma of mean value
- sangle[it] = 1.0e5; // Sigma of angle
- smeanangle[it] = 0.0; // Correlation
-
- sigmas[it] = 1.0e5;
- tchi2s[it] = 1.0e5; // Chi2s for tracklet
-
- }
-
- //
- // Calculate zmean
- //
- for (Int_t it = 0; it < t1 - t0; it++) {
- if (!cl[0][it]) {
- continue;
- }
- for (Int_t dt = -3; dt <= 3; dt++) {
- if (it+dt < 0) {
- continue;
- }
- if (it+dt > t1-t0) {
- continue;
- }
- if (!cl[0][it+dt]) {
- continue;
- }
- zmean[it] += cl[0][it+dt]->GetZ();
- nmean[it] += 1.0;
- }
- zmean[it] /= nmean[it];
- }
-
- for (Int_t it = 0; it < t1 - t0; it++) {
-
- best[0][it] = 0;
-
- for (Int_t ih = 0; ih < 10; ih++) {
- dz[ih][it] = -100.0;
- dy[ih][it] = -100.0;
- if (!cl[ih][it]) {
- continue;
- }
- Double_t xcluster = cl[ih][it]->GetX();
- Double_t ytrack;
- Double_t ztrack;
- track2.GetProlongation(xcluster,ytrack,ztrack );
- dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // Calculate distance from track in z
- dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // and in y
- }
-
- // Minimize changes
- if (!cl[0][it]) {
- continue;
- }
- if ((TMath::Abs(cl[0][it]->GetZ()-zmean[it]) > padlength * 0.8) &&
- (cl[1][it])) {
- if (TMath::Abs(cl[1][it]->GetZ()-zmean[it]) < padlength * 0.5) {
- best[0][it] = 1;
- }
- }
-
- }
-
- //
- // Iterative choice of "best path"
- //
- Int_t label = TMath::Abs(track->GetLabel());
- Int_t bestiter = 0;
-
- for (Int_t iter = 0; iter < 9; iter++) {
-
- changes[iter] = 0;
- sumz = 0;
- sum = 0;
- sumdy = 0;
- sumdy2 = 0;
- sumx = 0;
- sumx2 = 0;
- sumxy = 0;
- mpads = 0;
- ngood[iter] = 0;
- nbad[iter] = 0;
-
- // Linear fit
- for (Int_t it = 0; it < t1 - t0; it++) {
-
- if (!cl[best[iter][it]][it]) {
- continue;
- }
-
- // Calculates pad-row changes
- Double_t zbefore = cl[best[iter][it]][it]->GetZ();
- Double_t zafter = cl[best[iter][it]][it]->GetZ();
- for (Int_t itd = it - 1; itd >= 0; itd--) {
- if (cl[best[iter][itd]][itd]) {
- zbefore = cl[best[iter][itd]][itd]->GetZ();
- break;
- }
- }
- for (Int_t itd = it + 1; itd < t1 - t0; itd++) {
- if (cl[best[iter][itd]][itd]) {
- zafter = cl[best[iter][itd]][itd]->GetZ();
- break;
- }
- }
- if ((TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore) > 0.1) &&
- (TMath::Abs(cl[best[iter][it]][it]->GetZ()- zafter) > 0.1)) {
- changes[iter]++;
- }
-
- // Distance to reference x
- Double_t dx = x[it]-xmean;
- sumz += cl[best[iter][it]][it]->GetZ();
- sum++;
- sumdy += dy[best[iter][it]][it];
- sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
- sumx += dx;
- sumx2 += dx*dx;
- sumxy += dx*dy[best[iter][it]][it];
- mpads += cl[best[iter][it]][it]->GetNPads();
- if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
- (cl[best[iter][it]][it]->GetLabel(1) == label) ||
- (cl[best[iter][it]][it]->GetLabel(2) == label)) {
- ngood[iter]++;
- }
- else {
- nbad[iter]++;
- }
-
- }
-
- //
- // Calculates line parameters
- //
- Double_t det = sum*sumx2 - sumx*sumx;
- angle[iter] = (sum*sumxy - sumx*sumdy) / det;
- mean[iter] = (sumx2*sumdy - sumx*sumxy) / det;
- meanz[iter] = sumz / sum;
- moffset[iter] = sumdy / sum;
- mpads /= sum; // Mean number of pads
-
- Double_t sigma2 = 0.0; // Normalized residuals - for line fit
- Double_t sigma1 = 0.0; // Normalized residuals - constant fit
-
- for (Int_t it = 0; it < t1 - t0; it++) {
- if (!cl[best[iter][it]][it]) {
- continue;
- }
- Double_t dx = x[it] - xmean;
- Double_t ytr = mean[iter] + angle[iter] * dx;
- sigma2 += (dy[best[iter][it]][it] - ytr)
- * (dy[best[iter][it]][it] - ytr);
- sigma1 += (dy[best[iter][it]][it] - moffset[iter])
- * (dy[best[iter][it]][it] - moffset[iter]);
- sum++;
- }
- sigma2 /= (sum - 2); // Normalized residuals
- sigma1 /= (sum - 1); // Normalized residuals
- smean[iter] = sigma2 * (sumx2 / det); // Estimated error2 of mean
- sangle[iter] = sigma2 * ( sum / det); // Estimated error2 of angle
- smeanangle[iter] = sigma2 * (-sumx / det); // Correlation
- sigmas[iter] = TMath::Sqrt(sigma1);
- smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
-
- //
- // Iterative choice of "better path"
- //
- for (Int_t it = 0; it < t1 - t0; it++) {
-
- if (!cl[best[iter][it]][it]) {
- continue;
- }
-
- // Add unisochronity + angular effect contribution
- Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
- Double_t sweight = 1.0/sigmatr2 + 1.0/track->GetSigmaY2();
- Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
- Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
- Double_t mindist = 100000.0;
- Int_t ihbest = 0;
-
- for (Int_t ih = 0; ih < kN2; ih++) {
- if (!cl[ih][it]) {
- break;
- }
- Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
- dist2 *= dist2; // Chi2 distance
- if (dist2 < mindist) {
- mindist = dist2;
- ihbest = ih;
- }
- }
-
- best[iter+1][it] = ihbest;
-
- }
-
- //
- // Update best hypothesy if better chi2 according tracklet position and angle
- //
- sy2 = smean[iter] + track->GetSigmaY2();
- Double_t sa2 = sangle[iter] + track->GetSigmaSnp2(); // track->fCee;
- Double_t say = track->GetSigmaSnpY(); // track->fCey;
-
- Double_t detchi = sy2*sa2 - say*say;
- Double_t invers[3] = {sa2/detchi,sy2/detchi,-say/detchi}; // Inverse value of covariance matrix
-
- Double_t chi20 = mean[bestiter] * mean[bestiter] * invers[0]
- + angle[bestiter] * angle[bestiter] * invers[1]
- + 2.0 * mean[bestiter] * angle[bestiter] * invers[2];
- Double_t chi21 = mean[iter] * mean[iter] * invers[0]
- + angle[iter] * angle[iter] * invers[1]
- + 2.0 * mean[iter] * angle[iter] * invers[2];
- tchi2s[iter] = chi21;
-
- if ((changes[iter] <= changes[bestiter]) &&
- (chi21 < chi20)) {
- bestiter = iter;
- }
-
- }
-
- //
- // Set clusters
- //
- Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
- Short_t maxpos = -1;
- Float_t maxcharge = 0.0;
- Short_t maxpos4 = -1;
- Float_t maxcharge4 = 0.0;
- Short_t maxpos5 = -1;
- Float_t maxcharge5 = 0.0;
-
- Double_t exB = AliTRDCommonParam::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0));
- Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
- if (mpads > 3.5) {
- expectederr += (mpads - 3.5) * 0.04;
- }
- if (changes[bestiter] > 1) {
- expectederr += changes[bestiter] * 0.01;
- }
- expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
-
- for (Int_t it = 0; it < t1 - t0; it++) {
-
- if (!cl[best[bestiter][it]][it]) {
- continue;
- }
-
- // Set cluster error
- ((AliCluster*)cl[best[bestiter][it]][it])->SetSigmaY2(expectederr);
- if (!cl[best[bestiter][it]][it]->IsUsed()) {
- cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
- }
-
- // Time bins with maximal charge
- if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
- maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
- maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
- }
-
- if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
- if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
- maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
- maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
- }
- }
-
- if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
- if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
- maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
- maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
- }
- }
-
- // Time bins with maximal charge
- if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
- maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
- maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
- }
-
- if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
- if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
- maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
- maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
- }
- }
-
- if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
- if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
- maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
- maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
- }
- }
-
- clusters[it+t0] = indexes[best[bestiter][it]][it];
-
- }
-
- // Set tracklet parameters
- Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
- if (mpads > 3.5) {
- trackleterr2 += (mpads - 3.5) * 0.04;
- }
- trackleterr2 += changes[bestiter] * 0.01;
- trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
- trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
-
- tracklet.Set(xmean
- ,track2.GetY() + moffset[bestiter]
- ,meanz[bestiter]
- ,track2.GetAlpha()
- ,trackleterr2);
- tracklet.SetTilt(h01);
- tracklet.SetP0(mean[bestiter]);
- tracklet.SetP1(angle[bestiter]);
- tracklet.SetN(nfound);
- tracklet.SetNCross(changes[bestiter]);
- tracklet.SetPlane(layer);
- tracklet.SetSigma2(expectederr);
- tracklet.SetChi2(tchi2s[bestiter]);
- tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
- track->SetTracklets(layer,tracklet);
- track->SetNWrong(track->GetNWrong() + nbad[0]);
-
- //
- // Debuging part
- //
- TClonesArray array0("AliTRDcluster");
- TClonesArray array1("AliTRDcluster");
- array0.ExpandCreateFast(t1 - t0 + 1);
- array1.ExpandCreateFast(t1 - t0 + 1);
- TTreeSRedirector &cstream = *fDebugStreamer;
- AliTRDcluster dummy;
- Double_t dy0[100];
- Double_t dyb[100];
-
- for (Int_t it = 0; it < t1 - t0; it++) {
- dy0[it] = dy[0][it];
- dyb[it] = dy[best[bestiter][it]][it];
- if (cl[0][it]) {
- new(array0[it]) AliTRDcluster(*cl[0][it]);
- }
- else {
- new(array0[it]) AliTRDcluster(dummy);
- }
- if(cl[best[bestiter][it]][it]) {
- new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
- }
- else{
- new(array1[it]) AliTRDcluster(dummy);
- }
- }
-
- TGraph graph0(t1-t0,x,dy0);
- TGraph graph1(t1-t0,x,dyb);
- TGraph graphy(t1-t0,x,yt);
- TGraph graphz(t1-t0,x,zt);
-
- if (fReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0) {
- cstream << "tracklet"
- << "track.=" << track // Track parameters
- << "tany=" << tany // Tangent of the local track angle
- << "xmean=" << xmean // Xmean - reference x of tracklet
- << "tilt=" << h01 // Tilt angle
- << "nall=" << nall // Number of foundable clusters
- << "nfound=" << nfound // Number of found clusters
- << "clfound=" << clfound // Total number of found clusters in road
- << "mpads=" << mpads // Mean number of pads per cluster
- << "layer=" << layer // Layer number
- << "detector=" << detector // Detector number
- << "road=" << road // The width of the used road
- << "graph0.=" << &graph0 // x - y = dy for closest cluster
- << "graph1.=" << &graph1 // x - y = dy for second closest cluster
- << "graphy.=" << &graphy // y position of the track
- << "graphz.=" << &graphz // z position of the track
- //<< "fCl.=" << &array0 // closest cluster
- //<< "fCl2.=" << &array1 // second closest cluster
- << "maxpos=" << maxpos // Maximal charge postion
- << "maxcharge=" << maxcharge // Maximal charge
- << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
- << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
- << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
- << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
- << "bestiter=" << bestiter // Best iteration number
- << "tracklet.=" << &tracklet // Corrspond to the best iteration
- << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
- << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
- << "sigmas0=" << sigmas[0] // Residuals sigma
- << "sigmasb=" << sigmas[bestiter] // Residulas sigma
- << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
- << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
- << "ngoodb=" << ngood[bestiter] // in best iteration
- << "nbadb=" << nbad[bestiter] // in best iteration
- << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
- << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
- << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
- << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
- << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
- << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
- << "mean0=" << mean[0] // Mean dy in iter=0;
- << "smean0=" << smean[0] // Sigma of mean dy in iter=0
- << "meanb=" << mean[bestiter] // Mean dy in iter=best
- << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
- << "angle0=" << angle[0] // Angle deviation in the iteration number 0
- << "sangle0=" << sangle[0] // Sigma of angular deviation in iteration number 0
- << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
- << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
- << "expectederr=" << expectederr // Expected error of cluster position
- << "\n";
- }
-
- return nfound;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDtracker::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;
-
-}
-
-//_____________________________________________________________________________
-AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed * const 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->GetNumberOfTimeBinsDCS();
-
-
- 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);
- //printf("l[%d] index[%d] tb[%d] cptr[%p]\n", ilayer, index, itime, cl);
- 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
- 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;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDtracker::InitLogHists()
-{
- //
- // Create the log histograms
- //
-
- fHBackfit = new TH1D("logTRD_backfit" ,""
- , 40,-0.5, 39.5);
- fHRefit = new TH1D("logTRD_refit" ,""
- , 40,-0.5, 39.5);
- fHClSearch = new TH1D("logTRD_clSearch",""
- , 60,-0.5, 59.5);
-
- fHX = new TH1D("logTRD_X" ,";x (cm)"
- , 200, 50, 400);
- fHNCl = new TH1D("logTRD_ncl" ,""
- , 40,-0.5, 39.5);
- fHNClTrack = new TH1D("logTRD_nclTrack",""
- , 180,-0.5,179.5);
-
- fHMinYPos = new TH1D("logTRD_minYPos" ,";#delta Y (cm)"
- , 400, -6, 6);
- fHMinYNeg = new TH1D("logTRD_minYNeg" ,";#delta Y (cm)"
- , 400, -6, 6);
- fHMinZ = new TH1D("logTRD_minZ" ,";#delta Z (cm)"
- , 400, -20, 20);
- fHMinD = new TH2D("logTRD_minD" ,";#delta Y (cm);#delta Z (cm)"
- , 100, -6, 6
- , 100, -50, 50);
-
- fHDeltaX = new TH1D("logTRD_deltaX" ,";#delta X (cm)"
- , 100, -5, 5);
- fHXCl = new TH1D("logTRD_xCl" ,";cluster x position (cm)"
- ,1000, 280, 380);
-
- const Char_t *nameFindCl[4] = { "logTRD_clY"
- , "logTRD_clZ"
- , "logTRD_clB"
- , "logTRD_clG" };
-
- for (Int_t i = 0; i < 4; i++) {
- fHFindCl[i] = new TH1D(nameFindCl[i],"",30,-0.5,29.5);
- }
-
-}
-
-//_____________________________________________________________________________
-void AliTRDtracker::SaveLogHists()
-{
- //
- // Save the log histograms in AliESDs.root
- //
-
- TDirectory *sav = gDirectory;
- TFile *logFile = 0;
-
- TSeqCollection *col = gROOT->GetListOfFiles();
- Int_t nn = col->GetEntries();
- for (Int_t i = 0; i < nn; i++) {
- logFile = (TFile *) col->At(i);
- if (strstr(logFile->GetName(),"AliESDs.root")) {
- break;
- }
- }
-
- logFile->cd();
-
- fHBackfit->Write(fHBackfit->GetName(),TObject::kOverwrite);
- fHRefit->Write(fHRefit->GetName(),TObject::kOverwrite);
- fHClSearch->Write(fHClSearch->GetName(),TObject::kOverwrite);
- fHX->Write(fHX->GetName(),TObject::kOverwrite);
- fHNCl->Write(fHNCl->GetName(),TObject::kOverwrite);
- fHNClTrack->Write(fHNClTrack->GetName(),TObject::kOverwrite);
-
- fHMinYPos->Write(fHMinYPos->GetName(),TObject::kOverwrite);
- fHMinYNeg->Write(fHMinYNeg->GetName(),TObject::kOverwrite);
- fHMinD->Write(fHMinD->GetName(),TObject::kOverwrite);
- fHMinZ->Write(fHMinZ->GetName(),TObject::kOverwrite);
-
- fHDeltaX->Write(fHDeltaX->GetName(),TObject::kOverwrite);
- fHXCl->Write(fHXCl->GetName(),TObject::kOverwrite);
-
- for (Int_t i = 0; i < 4; i++) {
- fHFindCl[i]->Write(fHFindCl[i]->GetName(),TObject::kOverwrite);
- }
-
- logFile->Flush();
-
- sav->cd();
-
-}
git://git.uio.no / u / mrichter / AliRoot.git / commitdiff