X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=TRD%2FAliTRDtrackerV1.cxx;h=ba28453b5720ef7acbb4b2138d8a66d24902f367;hb=2420973e4193d5a6e8cff21970353fd7f9387f32;hp=857a123a372d5db6a250df404495fc02f6be250d;hpb=1a58d2178ae0a753ca9841b71389de5a986bd149;p=u%2Fmrichter%2FAliRoot.git diff --git a/TRD/AliTRDtrackerV1.cxx b/TRD/AliTRDtrackerV1.cxx index 857a123a372..ba28453b572 100644 --- a/TRD/AliTRDtrackerV1.cxx +++ b/TRD/AliTRDtrackerV1.cxx @@ -25,10 +25,6 @@ // // /////////////////////////////////////////////////////////////////////////////// -// #include -// #include -// #include - #include #include #include @@ -53,6 +49,7 @@ #include "AliTRDrecoParam.h" #include "AliTRDcluster.h" +#include "AliTRDdigitsParam.h" #include "AliTRDseedV1.h" #include "AliTRDtrackV1.h" #include "AliTRDtrackerV1.h" @@ -60,10 +57,9 @@ #include "AliTRDtrackingChamber.h" #include "AliTRDchamberTimeBin.h" - - ClassImp(AliTRDtrackerV1) - +ClassImp(AliTRDtrackerV1::AliTRDLeastSquare) +ClassImp(AliTRDtrackerV1::AliTRDtrackFitterRieman) const Float_t AliTRDtrackerV1::fgkMinClustersInTrack = 0.5; // const Float_t AliTRDtrackerV1::fgkLabelFraction = 0.8; // @@ -71,25 +67,26 @@ const Double_t AliTRDtrackerV1::fgkMaxChi2 = 12.0; // const Double_t AliTRDtrackerV1::fgkMaxSnp = 0.95; // Maximum local sine of the azimuthal angle const Double_t AliTRDtrackerV1::fgkMaxStep = 2.0; // Maximal step size in propagation Double_t AliTRDtrackerV1::fgTopologicQA[kNConfigs] = { - 0.1112, 0.1112, 0.1112, 0.0786, 0.0786, + 0.5112, 0.5112, 0.5112, 0.0786, 0.0786, 0.0786, 0.0786, 0.0579, 0.0579, 0.0474, 0.0474, 0.0408, 0.0335, 0.0335, 0.0335 }; const Double_t AliTRDtrackerV1::fgkX0[kNPlanes] = { 300.2, 312.8, 325.4, 338.0, 350.6, 363.2}; Int_t AliTRDtrackerV1::fgNTimeBins = 0; -AliRieman* AliTRDtrackerV1::fgRieman = 0x0; -TLinearFitter* AliTRDtrackerV1::fgTiltedRieman = 0x0; -TLinearFitter* AliTRDtrackerV1::fgTiltedRiemanConstrained = 0x0; +AliRieman* AliTRDtrackerV1::fgRieman = NULL; +TLinearFitter* AliTRDtrackerV1::fgTiltedRieman = NULL; +TLinearFitter* AliTRDtrackerV1::fgTiltedRiemanConstrained = NULL; //____________________________________________________________________ AliTRDtrackerV1::AliTRDtrackerV1(AliTRDReconstructor *rec) :AliTracker() - ,fReconstructor(0x0) - ,fGeom(0x0) - ,fClusters(0x0) - ,fTracklets(0x0) - ,fTracks(0x0) + ,fkReconstructor(NULL) + ,fGeom(NULL) + ,fClusters(NULL) + ,fTracklets(NULL) + ,fTracks(NULL) + ,fTracksESD(NULL) ,fSieveSeeding(0) { // @@ -104,7 +101,7 @@ AliTRDtrackerV1::AliTRDtrackerV1(AliTRDReconstructor *rec) } fGeom = new AliTRDgeometry(); fGeom->CreateClusterMatrixArray(); - TGeoHMatrix *matrix = 0x0; + TGeoHMatrix *matrix = NULL; Double_t loc[] = {0., 0., 0.}; Double_t glb[] = {0., 0., 0.}; for(Int_t ily=kNPlanes; ily--;){ @@ -119,13 +116,6 @@ AliTRDtrackerV1::AliTRDtrackerV1(AliTRDReconstructor *rec) fR[ily] = glb[0]+ AliTRDgeometry::AnodePos()-.5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick(); } - // initialize calibration values - AliTRDcalibDB *trd = 0x0; - if (!(trd = AliTRDcalibDB::Instance())) { - AliFatal("Could not get calibration."); - } - if(!fgNTimeBins) fgNTimeBins = trd->GetNumberOfTimeBins(); - // initialize cluster containers for (Int_t isector = 0; isector < AliTRDgeometry::kNsector; isector++) new(&fTrSec[isector]) AliTRDtrackingSector(fGeom, isector); @@ -133,6 +123,8 @@ AliTRDtrackerV1::AliTRDtrackerV1(AliTRDReconstructor *rec) memset(fTrackQuality, 0, kMaxTracksStack*sizeof(Double_t)); memset(fSeedLayer, 0, kMaxTracksStack*sizeof(Int_t)); memset(fSeedTB, 0, kNSeedPlanes*sizeof(AliTRDchamberTimeBin*)); + fTracksESD = new TClonesArray("AliESDtrack", 2*kMaxTracksStack); + fTracksESD->SetOwner(); } //____________________________________________________________________ @@ -142,10 +134,11 @@ AliTRDtrackerV1::~AliTRDtrackerV1() // Destructor // - if(fgRieman) delete fgRieman; fgRieman = 0x0; - if(fgTiltedRieman) delete fgTiltedRieman; fgTiltedRieman = 0x0; - if(fgTiltedRiemanConstrained) delete fgTiltedRiemanConstrained; fgTiltedRiemanConstrained = 0x0; + if(fgRieman) delete fgRieman; fgRieman = NULL; + if(fgTiltedRieman) delete fgTiltedRieman; fgTiltedRieman = NULL; + if(fgTiltedRiemanConstrained) delete fgTiltedRiemanConstrained; fgTiltedRiemanConstrained = NULL; for(Int_t isl =0; islDelete(); delete fTracksESD; } if(fTracks) {fTracks->Delete(); delete fTracks;} if(fTracklets) {fTracklets->Delete(); delete fTracklets;} if(fClusters) { @@ -172,7 +165,7 @@ Int_t AliTRDtrackerV1::Clusters2Tracks(AliESDEvent *esd) // See AliTRDtrackerV1::Clusters2TracksSM() for details. // - if(!fReconstructor->GetRecoParam() ){ + if(!fkReconstructor->GetRecoParam() ){ AliError("Reconstruction configuration not initialized. Call first AliTRDReconstructor::SetRecoParam()."); return 0; } @@ -184,7 +177,7 @@ Int_t AliTRDtrackerV1::Clusters2Tracks(AliESDEvent *esd) //AliInfo(Form("Processing supermodule %i ...", ism)); ntracks += Clusters2TracksSM(ism, esd); } - AliInfo(Form("Number of found tracks : %d", ntracks)); + AliInfo(Form("Number of tracks: !TRDin[%d]", ntracks)); return ntracks; } @@ -256,19 +249,34 @@ AliRieman* AliTRDtrackerV1::GetRiemanFitter() //_____________________________________________________________________________ Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) { - // - // Gets seeds from ESD event. The seeds are AliTPCtrack's found and - // backpropagated by the TPC tracker. Each seed is first propagated - // to the TRD, and then its prolongation is searched in the TRD. - // If sufficiently long continuation of the track is found in the TRD - // the track is updated, otherwise it's stored as originaly defined - // by the TPC tracker. - // +// Propagation of ESD tracks from TPC to TOF detectors and building of the TRD track. For building +// a TRD track an ESD track is used as seed. The informations obtained on the TRD track (measured points, +// covariance, PID, etc.) are than used to update the corresponding ESD track. +// Each track seed is first propagated to the geometrical limit of the TRD detector. +// Its prolongation is searched in the TRD and if corresponding clusters are found tracklets are +// constructed out of them (see AliTRDseedV1::AttachClusters()) and the track is updated. +// Otherwise the ESD track is left unchanged. +// +// The following steps are performed: +// 1. Selection of tracks based on the variance in the y-z plane. +// 2. Propagation to the geometrical limit of the TRD volume. If track propagation fails the AliESDtrack::kTRDStop is set. +// 3. Prolongation inside the fiducial volume (see AliTRDtrackerV1::FollowBackProlongation()) and marking +// the following status bits: +// - AliESDtrack::kTRDin - if the tracks enters the TRD fiducial volume +// - AliESDtrack::kTRDStop - if the tracks fails propagation +// - AliESDtrack::kTRDbackup - if the tracks fulfills chi2 conditions and qualify for refitting +// 4. Writting to friends, PID, MC label, quality etc. Setting status bit AliESDtrack::kTRDout. +// 5. Propagation to TOF. If track propagation fails the AliESDtrack::kTRDStop is set. +// + + if(!fClusters || !fClusters->GetEntriesFast()){ + AliInfo("No TRD clusters"); + return 0; + } + AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); // Calibration monitor + if (!calibra) AliInfo("Could not get Calibra instance"); + if(!fgNTimeBins) CookNTimeBins(); - // Calibration monitor - AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); - if (!calibra) AliInfo("Could not get Calibra instance\n"); - // Define scalers Int_t nFound = 0, // number of tracks found nSeeds = 0, // total number of ESD seeds @@ -276,8 +284,8 @@ Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) nTPCseeds= 0; // number of TPC seeds Float_t foundMin = 20.0; - Float_t *quality = 0x0; - Int_t *index = 0x0; + Float_t *quality = NULL; + Int_t *index = NULL; nSeeds = event->GetNumberOfTracks(); // Sort tracks according to quality // (covariance in the yz plane) @@ -328,7 +336,7 @@ Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); // prepare track and do propagation in the TRD - track.SetReconstructor(fReconstructor); + track.SetReconstructor(fkReconstructor); track.SetKink(Bool_t(seed->GetKinkIndex(0))); expectedClr = FollowBackProlongation(track); // check if track entered the TRD fiducial volume @@ -349,16 +357,14 @@ Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) // update calibration references using this track if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(&track); // save calibration object - if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ + if (fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0){ AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(track); calibTrack->SetOwner(); seed->AddCalibObject(calibTrack); } //update ESD track - if ((track.GetNumberOfClusters() > 15) && (track.GetNumberOfClusters() > 0.5*expectedClr)) { - seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); - track.UpdateESDtrack(seed); - } + seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); + track.UpdateESDtrack(seed); } if ((TMath::Abs(track.GetC(track.GetBz()) - p4) / TMath::Abs(p4) < 0.2) ||(track.Pt() > 0.8)) { @@ -412,7 +418,7 @@ Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) //(with the help of Annalisa de Caro Mar-17-2009) if(gGeoManager){ gGeoManager->cd(Form("/ALIC_1/B077_1/BSEGMO%d_1/BTOF%d_1", sm, sm)); - TGeoHMatrix *m = 0x0; + TGeoHMatrix *m = NULL; Double_t loc[]={0., 0., -.5*29.05}, glob[3]; if((m=gGeoManager->GetCurrentMatrix())){ @@ -432,7 +438,7 @@ Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); continue; } - seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); + //seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); // TODO obsolete - delete seed->SetTRDQuality(track.StatusForTOF()); } @@ -440,13 +446,12 @@ Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) } if(index) delete [] index; if(quality) delete [] quality; - - AliInfo(Form("Number of TPC seeds: %d (%d)", nTRDseeds, nTPCseeds)); - AliInfo(Form("Number of propagated TRD tracks: %d", nFound)); - + AliInfo(Form("Number of seeds: TPCout[%d] TRDin[%d]", nTPCseeds, nTRDseeds)); + AliInfo(Form("Number of tracks: TRDout[%d]", nFound)); + // run stand alone tracking - if (fReconstructor->IsSeeding()) Clusters2Tracks(event); + if (fkReconstructor->IsSeeding()) Clusters2Tracks(event); return 0; } @@ -467,11 +472,16 @@ Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event) Int_t found = 0; // contor for updated TRD tracks + if(!fClusters || !fClusters->GetEntriesFast()){ + AliInfo("No TRD clusters"); + return 0; + } AliTRDtrackV1 track; for (Int_t itrack = 0; itrack < event->GetNumberOfTracks(); itrack++) { AliESDtrack *seed = event->GetTrack(itrack); - new(&track) AliTRDtrackV1(*seed); + ULong_t status = seed->GetStatus(); + new(&track) AliTRDtrackV1(*seed); if (track.GetX() < 270.0) { seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); continue; @@ -479,7 +489,6 @@ Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event) // reject tracks which failed propagation in the TRD or // are produced by the TRD stand alone tracker - ULong_t status = seed->GetStatus(); if(!(status & AliESDtrack::kTRDout)) continue; if(!(status & AliESDtrack::kTRDin)) continue; nseed++; @@ -498,9 +507,9 @@ Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event) } // Update the friend track - if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ - TObject *o = 0x0; Int_t ic = 0; - AliTRDtrackV1 *calibTrack = 0x0; + if (fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0){ + TObject *o = NULL; Int_t ic = 0; + AliTRDtrackV1 *calibTrack = NULL; while((o = seed->GetCalibObject(ic++))){ if(!(calibTrack = dynamic_cast(o))) continue; calibTrack->SetTrackHigh(track.GetTrackHigh()); @@ -514,8 +523,8 @@ Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event) if (PropagateToX(tt, xTPC, fgkMaxStep)) seed->UpdateTrackParams(&tt, AliESDtrack::kTRDbackup); } } - AliInfo(Form("Number of loaded seeds: %d",nseed)); - AliInfo(Form("Number of found tracks from loaded seeds: %d",found)); + AliInfo(Form("Number of seeds: TRDout[%d]", nseed)); + AliInfo(Form("Number of tracks: TRDrefit[%d]", found)); return 0; } @@ -550,11 +559,14 @@ Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t) Bool_t kStoreIn = kTRUE; Int_t nClustersExpected = 0; for (Int_t iplane = kNPlanes; iplane--;) { - Int_t index = 0; + Int_t index(-1); AliTRDseedV1 *tracklet = GetTracklet(&t, iplane, index); + AliDebug(2, Form("Tracklet[%p] ly[%d] idx[%d]", (void*)tracklet, iplane, index)); if(!tracklet) continue; - if(!tracklet->IsOK()) AliWarning("tracklet not OK"); - + if(!tracklet->IsOK()){ + AliDebug(1, Form("Tracklet Det[%d] !OK", tracklet->GetDetector())); + continue; + } Double_t x = tracklet->GetX();//GetX0(); // reject tracklets which are not considered for inward refit if(x > t.GetX()+fgkMaxStep) continue; @@ -598,13 +610,15 @@ Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t) kStoreIn = kFALSE; } - Double_t maxChi2 = t.GetPredictedChi2(tracklet); - if (maxChi2 < 1e+10 && t.Update(tracklet, maxChi2)){ + Double_t cov[3]; tracklet->GetCovAt(x, cov); + Double_t p[2] = { tracklet->GetY(), tracklet->GetZ()}; + Double_t chi2 = ((AliExternalTrackParam)t).GetPredictedChi2(p, cov); + if (chi2 < 1e+10 && t.Update(p, cov, chi2)){ nClustersExpected += tracklet->GetN(); } } - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 1){ Int_t index; for(int iplane=0; iplaneGetDebugStream(AliTRDReconstructor::kTracker); - AliTRDtrackV1 track(t); - track.SetOwner(); - cstreamer << "FollowProlongation" - << "EventNumber=" << eventNumber - << "ncl=" << nClustersExpected - << "track.=" << &track - << "\n"; + if(fkReconstructor->IsDebugStreaming()){ + Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); + TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); + AliTRDtrackV1 track(t); + track.SetOwner(); + cstreamer << "FollowProlongation" + << "EventNumber=" << eventNumber + << "ncl=" << nClustersExpected + << "track.=" << &track + << "\n"; + } } - return nClustersExpected; } @@ -630,35 +645,53 @@ Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t) //_____________________________________________________________________________ Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) { - // Extrapolates the TRD track in the TOF direction. - // - // Parameters - // t : the TRD track which has to be extrapolated - // - // Output - // number of clusters attached to the track - // - // Detailed description - // - // Starting from current radial position of track this function - // extrapolates the track through the 6 TRD layers. The following steps - // are being performed for each plane: - // 1. prepare track: - // a. get plane limits in the local x direction - // b. check crossing sectors - // c. check track inclination - // 2. build tracklet (see AliTRDseed::AttachClusters() for details) - // 3. evaluate material budget using the geo manager - // 4. propagate and update track using the tracklet information. - // - // Debug level 2 - // +// Extrapolates/Build the TRD track in the TOF direction. +// +// Parameters +// t : the TRD track which has to be extrapolated +// +// Output +// number of clusters attached to the track +// +// Starting from current radial position of track this function +// extrapolates the track through the 6 TRD layers. The following steps +// are being performed for each plane: +// 1. Propagate track to the entrance of the next chamber: +// - get chamber limits in the radial direction +// - check crossing sectors +// - check track inclination +// - check track prolongation against boundary conditions (see exclusion boundaries on AliTRDgeometry::IsOnBoundary()) +// 2. Build tracklet (see AliTRDseed::AttachClusters() for details) for this layer if needed. If only +// Kalman filter is needed and tracklets are already linked to the track this step is skipped. +// 3. Fit tracklet using the information from the Kalman filter. +// 4. Propagate and update track at reference radial position of the tracklet. +// 5. Register tracklet with the tracker and track; update pulls monitoring. +// +// Observation +// 1. During the propagation a bit map is filled detailing the status of the track in each TRD chamber. The following errors are being registered for each tracklet: +// - AliTRDtrackV1::kProlongation : track prolongation failed +// - AliTRDtrackV1::kPropagation : track prolongation failed +// - AliTRDtrackV1::kAdjustSector : failed during sector crossing +// - AliTRDtrackV1::kSnp : too large bending +// - AliTRDtrackV1::kTrackletInit : fail to initialize tracklet +// - AliTRDtrackV1::kUpdate : fail to attach clusters or fit the tracklet +// - AliTRDtrackV1::kUnknown : anything which is not covered before +// 2. By default the status of the track before first TRD update is saved. +// +// Debug level 2 +// +// Author +// Alexandru Bercuci +// Int_t n = 0; Double_t driftLength = .5*AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick(); - AliTRDtrackingChamber *chamber = 0x0; + AliTRDtrackingChamber *chamber = NULL; - AliTRDseedV1 tracklet, *ptrTracklet = 0x0; + Int_t debugLevel = fkReconstructor->IsDebugStreaming() ? fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) : 0; + TTreeSRedirector *cstreamer = fkReconstructor->IsDebugStreaming() ? fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker) : 0x0; + + AliTRDseedV1 tracklet, *ptrTracklet = NULL; // in case of stand alone tracking we store all the pointers to the tracklets in a temporary array AliTRDseedV1 *tracklets[kNPlanes]; memset(tracklets, 0, sizeof(AliTRDseedV1 *) * kNPlanes); @@ -666,16 +699,19 @@ Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) tracklets[ip] = t.GetTracklet(ip); t.UnsetTracklet(ip); } - Bool_t kStoreIn = kTRUE; + Bool_t kStoreIn = kTRUE, kPropagateIn = kTRUE; // Loop through the TRD layers - TGeoHMatrix *matrix = 0x0; + TGeoHMatrix *matrix = NULL; Double_t x, y, z; for (Int_t ily=0, sm=-1, stk=-1, det=-1; ily < AliTRDgeometry::kNlayer; ily++) { + AliDebug(2, Form("Propagate to x[%d] = %7.2f", ily, fR[ily])); + // rough estimate of the entry point if (!t.GetProlongation(fR[ily], y, z)){ n=-1; t.SetStatus(AliTRDtrackV1::kProlongation); + AliDebug(4, Form("Failed Rough Prolongation to ly[%d] x[%7.2f] y[%7.2f] z[%7.2f]", ily, fR[ily], y, z)); break; } @@ -684,27 +720,32 @@ Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) // TODO cross check with y value ! stk = fGeom->GetStack(z, ily); det = stk>=0 ? AliTRDgeometry::GetDetector(ily, stk, sm) : -1; - matrix = det>=0 ? fGeom->GetClusterMatrix(det) : 0x0; + matrix = det>=0 ? fGeom->GetClusterMatrix(det) : NULL; + AliDebug(3, Form("Propagate to det[%3d]", det)); // check if supermodule/chamber is installed if( !fGeom->GetSMstatus(sm) || stk<0. || fGeom->IsHole(ily, stk, sm) || !matrix ){ + AliDebug(4, Form("Missing Geometry ly[%d]. Guess radial position", ily)); // propagate to the default radial position if(fR[ily] > (fgkMaxStep + t.GetX()) && !PropagateToX(t, fR[ily], fgkMaxStep)){ n=-1; t.SetStatus(AliTRDtrackV1::kPropagation); + AliDebug(4, "Failed Propagation [Missing Geometry]"); break; } if(!AdjustSector(&t)){ n=-1; t.SetStatus(AliTRDtrackV1::kAdjustSector); + AliDebug(4, "Failed Adjust Sector [Missing Geometry]"); break; } if(TMath::Abs(t.GetSnp()) > fgkMaxSnp){ n=-1; t.SetStatus(AliTRDtrackV1::kSnp); + AliDebug(4, "Failed Max Snp [Missing Geometry]"); break; } t.SetStatus(AliTRDtrackV1::kGeometry, ily); @@ -721,31 +762,35 @@ Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) if(x > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x, fgkMaxStep)){ n=-1; t.SetStatus(AliTRDtrackV1::kPropagation); + AliDebug(4, Form("Failed Initial Propagation to x[%7.2f]", x)); break; } if(!AdjustSector(&t)){ n=-1; t.SetStatus(AliTRDtrackV1::kAdjustSector); + AliDebug(4, "Failed Adjust Sector Start"); break; } if(TMath::Abs(t.GetSnp()) > fgkMaxSnp) { n=-1; t.SetStatus(AliTRDtrackV1::kSnp); + AliDebug(4, Form("Failed Max Snp[%f] MaxSnp[%f]", t.GetSnp(), fgkMaxSnp)); break; } - Bool_t RECALCULATE = kFALSE; + Bool_t doRecalculate = kFALSE; if(sm != t.GetSector()){ sm = t.GetSector(); - RECALCULATE = kTRUE; + doRecalculate = kTRUE; } if(stk != fGeom->GetStack(z, ily)){ stk = fGeom->GetStack(z, ily); - RECALCULATE = kTRUE; + doRecalculate = kTRUE; } - if(RECALCULATE){ + if(doRecalculate){ det = AliTRDgeometry::GetDetector(ily, stk, sm); if(!(matrix = fGeom->GetClusterMatrix(det))){ t.SetStatus(AliTRDtrackV1::kGeometry, ily); + AliDebug(4, Form("Failed Geometry Matrix ly[%d]", ily)); continue; } matrix->LocalToMaster(loc, glb); @@ -756,10 +801,12 @@ Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) if (!t.GetProlongation(x+fgkMaxStep, y, z)) { n=-1; t.SetStatus(AliTRDtrackV1::kProlongation); + AliDebug(4, Form("Failed Prolongation to x[%7.2f] y[%7.2f] z[%7.2f]", x+fgkMaxStep, y, z)); break; } if(fGeom->IsOnBoundary(det, y, z, .5)){ t.SetStatus(AliTRDtrackV1::kBoundary, ily); + AliDebug(4, "Failed Track on Boundary"); continue; } // mark track as entering the FIDUCIAL volume of TRD @@ -770,88 +817,150 @@ Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) ptrTracklet = tracklets[ily]; if(!ptrTracklet){ // BUILD TRACKLET + AliDebug(3, Form("Building tracklet det[%d]", det)); // check data in supermodule if(!fTrSec[sm].GetNChambers()){ t.SetStatus(AliTRDtrackV1::kNoClusters, ily); + AliDebug(4, "Failed NoClusters"); continue; } if(fTrSec[sm].GetX(ily) < 1.){ t.SetStatus(AliTRDtrackV1::kNoClusters, ily); + AliDebug(4, "Failed NoX"); continue; } // check data in chamber if(!(chamber = fTrSec[sm].GetChamber(stk, ily))){ t.SetStatus(AliTRDtrackV1::kNoClusters, ily); + AliDebug(4, "Failed No Detector"); continue; } - if(chamber->GetNClusters() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()){ + if(chamber->GetNClusters() < fgNTimeBins*fkReconstructor->GetRecoParam() ->GetFindableClusters()){ t.SetStatus(AliTRDtrackV1::kNoClusters, ily); + AliDebug(4, "Failed Not Enough Clusters in Detector"); continue; } // build tracklet ptrTracklet = new(&tracklet) AliTRDseedV1(det); - ptrTracklet->SetReconstructor(fReconstructor); + ptrTracklet->SetReconstructor(fkReconstructor); ptrTracklet->SetKink(t.IsKink()); ptrTracklet->SetPadPlane(fGeom->GetPadPlane(ily, stk)); ptrTracklet->SetX0(glb[0]+driftLength); if(!tracklet.Init(&t)){ n=-1; t.SetStatus(AliTRDtrackV1::kTrackletInit); + AliDebug(4, "Failed Tracklet Init"); break; } if(!tracklet.AttachClusters(chamber, kTRUE)){ t.SetStatus(AliTRDtrackV1::kNoAttach, ily); + if(debugLevel>3){ + AliTRDseedV1 trackletCp(*ptrTracklet); + UChar_t status(t.GetStatusTRD(ily)); + (*cstreamer) << "FollowBackProlongation2" + <<"status=" << status + <<"tracklet.=" << &trackletCp + << "\n"; + } + AliDebug(4, "Failed Attach Clusters"); continue; } - if(tracklet.GetN() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()){ + AliDebug(3, Form("Number of Clusters in Tracklet: %d", tracklet.GetN())); + if(tracklet.GetN() < fgNTimeBins*fkReconstructor->GetRecoParam() ->GetFindableClusters()){ t.SetStatus(AliTRDtrackV1::kNoClustersTracklet, ily); + if(debugLevel>3){ + AliTRDseedV1 trackletCp(*ptrTracklet); + UChar_t status(t.GetStatusTRD(ily)); + (*cstreamer) << "FollowBackProlongation2" + <<"status=" << status + <<"tracklet.=" << &trackletCp + << "\n"; + } + AliDebug(4, "Failed N Clusters Attached"); continue; } ptrTracklet->UpdateUsed(); - } - + } else AliDebug(2, Form("Use external tracklet ly[%d]", ily)); // propagate track to the radial position of the tracklet ptrTracklet->UseClusters(); // TODO ? do we need this here ? // fit tracklet no tilt correction if(!ptrTracklet->Fit(kFALSE)){ t.SetStatus(AliTRDtrackV1::kNoFit, ily); + AliDebug(4, "Failed Tracklet Fit"); continue; } x = ptrTracklet->GetX(); //GetX0(); if(x > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x, fgkMaxStep)) { n=-1; t.SetStatus(AliTRDtrackV1::kPropagation); + AliDebug(4, Form("Failed Propagation to Tracklet x[%7.2f]", x)); break; } if(!AdjustSector(&t)) { n=-1; t.SetStatus(AliTRDtrackV1::kAdjustSector); + AliDebug(4, "Failed Adjust Sector"); break; } if(TMath::Abs(t.GetSnp()) > fgkMaxSnp) { n=-1; t.SetStatus(AliTRDtrackV1::kSnp); + AliDebug(4, Form("Failed Max Snp[%f] MaxSnp[%f]", t.GetSnp(), fgkMaxSnp)); break; } - + if(kPropagateIn){ + t.SetTrackLow(); + kPropagateIn = kFALSE; + } + Double_t cov[3]; ptrTracklet->GetCovAt(x, cov); + Double_t p[2] = { ptrTracklet->GetY(), ptrTracklet->GetZ()}; + Double_t chi2 = ((AliExternalTrackParam)t).GetPredictedChi2(p, cov); // update Kalman with the TRD measurement - Double_t chi2 = t.GetPredictedChi2(ptrTracklet); - if(chi2>1e+10){ + if(chi2>1e+10){ // TODO t.SetStatus(AliTRDtrackV1::kChi2, ily); + if(debugLevel > 2){ + UChar_t status(t.GetStatusTRD()); + AliTRDseedV1 trackletCp(*ptrTracklet); + AliTRDtrackV1 trackCp(t); + trackCp.SetOwner(); + (*cstreamer) << "FollowBackProlongation1" + << "status=" << status + << "tracklet.=" << &trackletCp + << "track.=" << &trackCp + << "\n"; + } + AliDebug(4, Form("Failed Chi2[%f]", chi2)); continue; } - if(!t.Update(ptrTracklet, chi2)) { + if(!t.Update(p, cov, chi2)) { n=-1; t.SetStatus(AliTRDtrackV1::kUpdate); + if(debugLevel > 2){ + UChar_t status(t.GetStatusTRD()); + AliTRDseedV1 trackletCp(*ptrTracklet); + AliTRDtrackV1 trackCp(t); + trackCp.SetOwner(); + (*cstreamer) << "FollowBackProlongation1" + << "status=" << status + << "tracklet.=" << &trackletCp + << "track.=" << &trackCp + << "\n"; + } + AliDebug(4, Form("Failed Track Update @ y[%7.2f] z[%7.2f] s2y[%f] s2z[%f] covyz[%f]", p[0], p[1], cov[0], cov[2], cov[1])); break; } + // fill residuals ?! + AliTracker::FillResiduals(&t, p, cov, ptrTracklet->GetVolumeId()); + // load tracklet to the tracker - ptrTracklet->UpDate(&t); + ptrTracklet->Update(&t); ptrTracklet = SetTracklet(ptrTracklet); - t.SetTracklet(ptrTracklet, fTracklets->GetEntriesFast()-1); + Int_t index(fTracklets->GetEntriesFast()-1); + t.SetTracklet(ptrTracklet, index); n += ptrTracklet->GetN(); + AliDebug(2, Form("Setting Tracklet[%d] @ Idx[%d]", ily, index)); // Reset material budget if 2 consecutive gold // if(ilayer>0 && t.GetTracklet(ilayer-1) && ptrTracklet->GetN() + t.GetTracklet(ilayer-1)->GetN() > 20) t.SetBudget(2, 0.); @@ -875,12 +984,11 @@ Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) //printf("clusters[%d] chi2[%f] x[%f] status[%d ", n, t.GetChi2(), t.GetX(), t.GetStatusTRD()); //for(int i=0; i<6; i++) printf("%d ", t.GetStatusTRD(i)); printf("]\n"); - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + if(debugLevel > 1){ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); AliTRDtrackV1 track(t); track.SetOwner(); - cstreamer << "FollowBackProlongation" + (*cstreamer) << "FollowBackProlongation0" << "EventNumber=" << eventNumber << "ncl=" << n << "track.=" << &track @@ -891,7 +999,7 @@ Int_t AliTRDtrackerV1::FollowBackProlongation(AliTRDtrackV1 &t) } //_________________________________________________________________________ -Float_t AliTRDtrackerV1::FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *planes){ +Float_t AliTRDtrackerV1::FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *const planes){ // // Fits a Riemann-circle to the given points without tilting pad correction. // The fit is performed using an instance of the class AliRieman (equations @@ -995,7 +1103,7 @@ Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Doub TLinearFitter *fitter = GetTiltedRiemanFitterConstraint(); fitter->StoreData(kTRUE); fitter->ClearPoints(); - AliTRDcluster *cl = 0x0; + AliTRDcluster *cl = NULL; Float_t x, y, z, w, t, error, tilt; Double_t uvt[2]; @@ -1005,6 +1113,7 @@ Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Doub for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ if(!tracklets[ilr].IsUsable(itb)) continue; cl = tracklets[ilr].GetClusters(itb); + if(!cl->IsInChamber()) continue; x = cl->GetX(); y = cl->GetY(); z = cl->GetZ(); @@ -1014,7 +1123,7 @@ Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Doub uvt[0] = 2. * x * t; uvt[1] = 2. * x * t * tilt ; w = 2. * (y + tilt * (z - zVertex)) * t; - error = 2. * TMath::Sqrt(cl->GetSigmaY2()) * t; + error = 2. * TMath::Sqrt(cl->GetSigmaY2()+tilt*tilt*cl->GetSigmaZ2()) * t; fitter->AddPoint(uvt, w, error); nPoints++; } @@ -1030,7 +1139,7 @@ Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Doub for(Int_t ip = 0; ip < AliTRDtrackerV1::kNPlanes; ip++) tracklets[ip].SetC(curvature); -/* if(fReconstructor->GetStreamLevel() >= 5){ +/* if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker()) >= 5){ //Linear Model on z-direction Double_t xref = CalculateReferenceX(tracklets); // Relative to the middle of the stack Double_t slope = fitter->GetParameter(2); @@ -1038,7 +1147,7 @@ Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Doub Float_t chi2Z = CalculateChi2Z(tracklets, zref, slope, xref); Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); - TTreeSRedirector &treeStreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + TTreeSRedirector &treeStreamer = *fkReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); treeStreamer << "FitTiltedRiemanConstraint" << "EventNumber=" << eventNumber << "CandidateNumber=" << candidateNumber @@ -1087,11 +1196,13 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro fitter->StoreData(kTRUE); fitter->ClearPoints(); AliTRDLeastSquare zfitter; - AliTRDcluster *cl = 0x0; + AliTRDcluster *cl = NULL; Double_t xref = CalculateReferenceX(tracklets); - Double_t x, y, z, t, tilt, dx, w, we; - Double_t uvt[4]; + Double_t x, y, z, t, tilt, dx, w, we, erry, errz; + Double_t uvt[4], sumPolY[5], sumPolZ[3]; + memset(sumPolY, 0, sizeof(Double_t) * 5); + memset(sumPolZ, 0, sizeof(Double_t) * 3); Int_t nPoints = 0; // Containers for Least-square fitter for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ @@ -1099,6 +1210,7 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro tilt = tracklets[ipl].GetTilt(); for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ if(!(cl = tracklets[ipl].GetClusters(itb))) continue; + if(!cl->IsInChamber()) continue; if (!tracklets[ipl].IsUsable(itb)) continue; x = cl->GetX(); y = cl->GetY(); @@ -1113,9 +1225,21 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro w = 2. * (y + tilt*z) * t; // error definition changes for the different calls we = 2. * t; - we *= sigError ? TMath::Sqrt(cl->GetSigmaY2()) : 0.2; + we *= sigError ? TMath::Sqrt(cl->GetSigmaY2()+tilt*tilt*cl->GetSigmaZ2()) : 0.2; fitter->AddPoint(uvt, w, we); zfitter.AddPoint(&x, z, static_cast(TMath::Sqrt(cl->GetSigmaZ2()))); + // adding points for covariance matrix estimation + erry = 1./(TMath::Sqrt(cl->GetSigmaY2()) + 0.1); // 0.1 is a systematic error (due to misalignment and miscalibration) + erry *= erry; + errz = 1./cl->GetSigmaZ2(); + for(Int_t ipol = 0; ipol < 5; ipol++){ + sumPolY[ipol] += erry; + erry *= x; + if(ipol < 3){ + sumPolZ[ipol] += errz; + errz *= x; + } + } nPoints++; } } @@ -1157,16 +1281,45 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro Double_t chi2track = fitter->GetChisquare()/Double_t(nPoints); + // Prepare error calculation + TMatrixD covarPolY(3,3); + covarPolY(0,0) = sumPolY[0]; covarPolY(1,1) = sumPolY[2]; covarPolY(2,2) = sumPolY[4]; + covarPolY(0,1) = covarPolY(1,0) = sumPolY[1]; + covarPolY(0,2) = covarPolY(2,0) = sumPolY[2]; + covarPolY(2,1) = covarPolY(1,2) = sumPolY[3]; + covarPolY.Invert(); + TMatrixD covarPolZ(2,2); + covarPolZ(0,0) = sumPolZ[0]; covarPolZ(1,1) = sumPolZ[2]; + covarPolZ(1,0) = covarPolZ(0,1) = sumPolZ[1]; + covarPolZ.Invert(); + // Update the tracklets - Double_t dy, dz; + Double_t x1, dy, dz; + Double_t cov[15]; + memset(cov, 0, sizeof(Double_t) * 15); for(Int_t iLayer = 0; iLayer < AliTRDtrackerV1::kNPlanes; iLayer++) { x = tracklets[iLayer].GetX0(); + x1 = x - xref; y = 0; z = 0; dy = 0; dz = 0; - + memset(cov, 0, sizeof(Double_t) * 3); + TMatrixD transform(3,3); + transform(0,0) = 1; + transform(0,1) = x; + transform(0,2) = x*x; + transform(1,1) = 1; + transform(1,2) = x; + transform(2,2) = 1; + TMatrixD covariance(transform, TMatrixD::kMult, covarPolY); + covariance *= transform.T(); + TMatrixD transformZ(2,2); + transformZ(0,0) = transformZ(1,1) = 1; + transformZ(0,1) = x; + TMatrixD covarZ(transformZ, TMatrixD::kMult, covarPolZ); + covarZ *= transformZ.T(); // y: R^2 = (x - x0)^2 + (y - y0)^2 // => y = y0 +/- Sqrt(R^2 - (x - x0)^2) // R = Sqrt() = 1/Curvature @@ -1178,6 +1331,9 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro res = TMath::Sqrt(res); y = (1.0 - res) / a; } + cov[0] = covariance(0,0); + cov[2] = covarZ(0,0); + cov[1] = 0.; // dy: R^2 = (x - x0)^2 + (y - y0)^2 // => y = +/- Sqrt(R^2 - (x - x0)^2) + y0 @@ -1187,9 +1343,9 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro Double_t x0 = -b / a; if (-c * a + b * b + 1 > 0) { if (1.0/(curvature * curvature) - (x - x0) * (x - x0) > 0.0) { - Double_t yderiv = (x - x0) / TMath::Sqrt(1.0/(curvature * curvature) - (x - x0) * (x - x0)); - if (a < 0) yderiv *= -1.0; - dy = yderiv; + Double_t yderiv = (x - x0) / TMath::Sqrt(1.0/(curvature * curvature) - (x - x0) * (x - x0)); + if (a < 0) yderiv *= -1.0; + dy = yderiv; } } z = offset + slope * (x - xref); @@ -1199,11 +1355,12 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro tracklets[iLayer].SetZref(0, z); tracklets[iLayer].SetZref(1, dz); tracklets[iLayer].SetC(curvature); + tracklets[iLayer].SetCovRef(cov); tracklets[iLayer].SetChi2(chi2track); } -/* if(fReconstructor->GetStreamLevel() >=5){ - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); +/* if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) >=5){ + TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); Double_t chi2z = CalculateChi2Z(tracklets, offset, slope, xref); @@ -1221,10 +1378,15 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro //____________________________________________________________________ Double_t AliTRDtrackerV1::FitLine(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t err, Int_t np, AliTrackPoint *points) { + // + // Fit track with a staight line + // Fills an AliTrackPoint array with np points + // Function should be used to refit tracks when no magnetic field was on + // AliTRDLeastSquare yfitter, zfitter; - AliTRDcluster *cl = 0x0; + AliTRDcluster *cl = NULL; - AliTRDseedV1 work[kNPlanes], *tracklet = 0x0; + AliTRDseedV1 work[kNPlanes], *tracklet = NULL; if(!tracklets){ for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ if(!(tracklet = track->GetTracklet(ipl))) continue; @@ -1289,42 +1451,63 @@ Double_t AliTRDtrackerV1::FitLine(const AliTRDtrackV1 *track, AliTRDseedV1 *trac //_________________________________________________________________________ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t sigError, Int_t np, AliTrackPoint *points) { - // - // Performs a Riemann fit taking tilting pad correction into account - // The equation of a Riemann circle, where the y position is substituted by the - // measured y-position taking pad tilting into account, has to be transformed - // into a 4-dimensional hyperplane equation - // Riemann circle: (x-x0)^2 + (y-y0)^2 -R^2 = 0 - // Measured y-Position: ymeas = y - tan(phiT)(zc - zt) - // zc: center of the pad row - // zt: z-position of the track - // The z-position of the track is assumed to be linear dependent on the x-position - // Transformed equation: a + b * u + c * t + d * v + e * w - 2 * (ymeas + tan(phiT) * zc) * t = 0 - // Transformation: u = 2 * x * t - // v = 2 * tan(phiT) * t - // w = 2 * tan(phiT) * (x - xref) * t - // t = 1 / (x^2 + ymeas^2) - // Parameters: a = -1/y0 - // b = x0/y0 - // c = (R^2 -x0^2 - y0^2)/y0 - // d = offset - // e = dz/dx - // If the offset respectively the slope in z-position is impossible, the parameters are fixed using - // results from the simple riemann fit. Afterwards the fit is redone. - // The curvature is calculated according to the formula: - // curv = a/(1 + b^2 + c*a) = 1/R - // - // Paramters: - Array of tracklets (connected to the track candidate) - // - Flag selecting the error definition - // Output: - Chi2 values of the track (in Parameter list) - // +// +// Performs a Riemann fit taking tilting pad correction into account +// +// Paramters: - Array of tracklets (connected to the track candidate) +// - Flag selecting the error definition +// Output: - Chi2 values of the track (in Parameter list) +// +// The equations which has to be solved simultaneously are: +// BEGIN_LATEX +// R^{2} = (x-x_{0})^{2} + (y^{*}-y_{0})^{2} +// y^{*} = y - tg(h)(z - z_{t}) +// z_{t} = z_{0}+dzdx*(x-x_{r}) +// END_LATEX +// with (x, y, z) the coordinate of the cluster, (x_0, y_0, z_0) the coordinate of the center of the Riemann circle, +// R its radius, x_r a constant refrence radial position in the middle of the TRD stack and dzdx the slope of the +// track in the x-z plane. Using the following transformations +// BEGIN_LATEX +// t = 1 / (x^{2} + y^{2}) +// u = 2 * x * t +// v = 2 * tan(h) * t +// w = 2 * tan(h) * (x - x_{r}) * t +// END_LATEX +// One gets the following linear equation +// BEGIN_LATEX +// a + b * u + c * t + d * v + e * w = 2 * (y + tg(h) * z) * t +// END_LATEX +// where the coefficients have the following meaning +// BEGIN_LATEX +// a = -1/y_{0} +// b = x_{0}/y_{0} +// c = (R^{2} -x_{0}^{2} - y_{0}^{2})/y_{0} +// d = z_{0} +// e = dz/dx +// END_LATEX +// The error calculation for the free term is thus +// BEGIN_LATEX +// #sigma = 2 * #sqrt{#sigma^{2}_{y} + (tilt corr ...) + tg^{2}(h) * #sigma^{2}_{z}} * t +// END_LATEX +// +// From this simple model one can compute chi^2 estimates and a rough approximation of pt from the curvature according +// to the formula: +// BEGIN_LATEX +// C = 1/R = a/(1 + b^{2} + c*a) +// END_LATEX +// +// Authors +// M.Ivanov +// A.Bercuci +// M.Fasel + TLinearFitter *fitter = GetTiltedRiemanFitter(); fitter->StoreData(kTRUE); fitter->ClearPoints(); AliTRDLeastSquare zfitter; - AliTRDcluster *cl = 0x0; + AliTRDcluster *cl = NULL; - AliTRDseedV1 work[kNPlanes], *tracklet = 0x0; + AliTRDseedV1 work[kNPlanes], *tracklet = NULL; if(!tracklets){ for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ if(!(tracklet = track->GetTracklet(ipl))) continue; @@ -1335,6 +1518,8 @@ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 } Double_t xref = CalculateReferenceX(tracklets); + AliDebugGeneral("AliTRDtrackerV1::FitRiemanTilt()", 4, + Form("\nx0[(0)%6.2f (1)%6.2f (2)%6.2f (3)%6.2f (4)%6.2f (5)%6.2f] xref[%6.2f]", tracklets[0].GetX0(), tracklets[1].GetX0(), tracklets[2].GetX0(), tracklets[3].GetX0(), tracklets[4].GetX0(), tracklets[5].GetX0(), xref)); Double_t x, y, z, t, tilt, dx, w, we; Double_t uvt[4]; Int_t nPoints = 0; @@ -1343,7 +1528,7 @@ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 if(!tracklets[ipl].IsOK()) continue; for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ if(!(cl = tracklets[ipl].GetClusters(itb))) continue; - if (!tracklets[ipl].IsUsable(itb)) continue; + //if (!tracklets[ipl].IsUsable(itb)) continue; x = cl->GetX(); y = cl->GetY(); z = cl->GetZ(); @@ -1401,18 +1586,20 @@ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 Double_t x0 = -b * y0; Double_t tmp = y0*y0 + x0*x0 - c*y0; if(tmp<=0.) return 1.E10; - Double_t R = TMath::Sqrt(tmp); - Double_t C = 1.0 + b*b - c*a; - if (C > 0.0) C = a / TMath::Sqrt(C); + Double_t radius = TMath::Sqrt(tmp); + Double_t curvature = 1.0 + b*b - c*a; + if (curvature > 0.0) curvature = a / TMath::Sqrt(curvature); // Calculate chi2 of the fit Double_t chi2 = fitter->GetChisquare()/Double_t(nPoints); + AliDebugGeneral("AliTRDtrackerV1::FitRiemanTilt()", 4, + Form("x0[%6.2f] y0[%6.2f] R[%6.2f] chi2[%f]\n", x0, y0, radius, chi2)); // Update the tracklets if(!track){ for(Int_t ip = 0; ip < kNPlanes; ip++) { x = tracklets[ip].GetX0(); - tmp = R*R-(x-x0)*(x-x0); + tmp = radius*radius-(x-x0)*(x-x0); if(tmp <= 0.) continue; tmp = TMath::Sqrt(tmp); @@ -1423,7 +1610,7 @@ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 tracklets[ip].SetYref(1, (x - x0) / tmp); tracklets[ip].SetZref(0, z0 + dzdx * (x - xref)); tracklets[ip].SetZref(1, dzdx); - tracklets[ip].SetC(C); + tracklets[ip].SetC(curvature); tracklets[ip].SetChi2(chi2); } } @@ -1432,7 +1619,7 @@ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 Float_t xyz[3]; for(int ip=0; ip R ? 100. : y0 - (y0>0.?1.:-1.)*TMath::Sqrt((R-(xyz[0]-x0))*(R+(xyz[0]-x0))); + xyz[1] = TMath::Abs(xyz[0] - x0) > radius ? 100. : y0 - (y0>0.?1.:-1.)*TMath::Sqrt((radius-(xyz[0]-x0))*(radius+(xyz[0]-x0))); xyz[2] = z0 + dzdx * (xyz[0] - xref); points[ip].SetXYZ(xyz); } @@ -1443,7 +1630,7 @@ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 //____________________________________________________________________ -Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklets, Bool_t up, Int_t np, AliTrackPoint *points) +Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 * const tracklets, Bool_t up, Int_t np, AliTrackPoint *points) { // Kalman filter implementation for the TRD. // It returns the positions of the fit in the array "points" @@ -1462,7 +1649,7 @@ Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklet //if(points) printf("First marker point @ x[%d] = %f\n", ip, points[ip].GetX()); - AliTRDseedV1 tracklet, *ptrTracklet = 0x0; + AliTRDseedV1 tracklet, *ptrTracklet = NULL; //Loop through the TRD planes for (Int_t jplane = 0; jplane < kNPlanes; jplane++) { @@ -1472,8 +1659,8 @@ Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklet if(!(ptrTracklet = &tracklets[iplane])) continue; }else{ if(!(ptrTracklet = track->GetTracklet(iplane))){ - /*AliTRDtrackerV1 *tracker = 0x0; - if(!(tracker = dynamic_cast( AliTRDReconstructor::Tracker()))) continue; + /*AliTRDtrackerV1 *tracker = NULL; + if(!(tracker = dynamic_cast( AliTRDrecoParam:Tracker()))) continue; ptrTracklet = new(&tracklet) AliTRDseedV1(iplane); if(!tracker->MakeTracklet(ptrTracklet, track)) */ continue; @@ -1526,7 +1713,7 @@ Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklet xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha); xyz1[1] = +x * TMath::Sin(alpha) + y * TMath::Cos(alpha); xyz1[2] = z; - if((xyz0[0] - xyz1[9] < 1e-3) && (xyz0[0] - xyz1[9] < 1e-3)) continue; // check wheter we are at the same global x position + if(TMath::Abs(xyz0[0] - xyz1[0]) < 1e-3 && TMath::Abs(xyz0[1] - xyz1[1]) < 1e-3) continue; // check wheter we are at the same global x position Double_t param[7]; if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param) <=0.) break; Double_t xrho = param[0]*param[4]; // density*length @@ -1537,8 +1724,10 @@ Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklet if (!AdjustSector(track)) break; //Update track - Double_t chi2 = track->GetPredictedChi2(ptrTracklet); - if(chi2<1e+10) track->Update(ptrTracklet, chi2); + Double_t cov[3]; ptrTracklet->GetCovAt(x, cov); + Double_t p[2] = { ptrTracklet->GetY(), ptrTracklet->GetZ()}; + Double_t chi2 = ((AliExternalTrackParam*)track)->GetPredictedChi2(p, cov); + if(chi2<1e+10) track->Update(p, cov, chi2); if(!up) continue; //Reset material budget if 2 consecutive gold @@ -1619,9 +1808,7 @@ Int_t AliTRDtrackerV1::PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t m 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 - } + if(t.GetProlongation(x,y,z)<0) 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()); @@ -1668,8 +1855,8 @@ Int_t AliTRDtrackerV1::ReadClusters(TClonesArray* &array, TTree *clusterTree) co branch->SetAddress(&clusterArray); if(!fClusters){ - Float_t nclusters = fReconstructor->GetRecoParam()->GetNClusters(); - if(fReconstructor->IsHLT()) nclusters /= AliTRDgeometry::kNsector; + Float_t nclusters = fkReconstructor->GetRecoParam()->GetNClusters(); + if(fkReconstructor->IsHLT()) nclusters /= AliTRDgeometry::kNsector; array = new TClonesArray("AliTRDcluster", Int_t(nclusters)); array->SetOwner(kTRUE); } @@ -1678,7 +1865,7 @@ Int_t AliTRDtrackerV1::ReadClusters(TClonesArray* &array, TTree *clusterTree) co Int_t nEntries = (Int_t) clusterTree->GetEntries(); Int_t nbytes = 0; Int_t ncl = 0; - AliTRDcluster *c = 0x0; + AliTRDcluster *c = NULL; for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) { // Import the tree nbytes += clusterTree->GetEvent(iEntry); @@ -1687,7 +1874,6 @@ Int_t AliTRDtrackerV1::ReadClusters(TClonesArray* &array, TTree *clusterTree) co Int_t nCluster = clusterArray->GetEntriesFast(); for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) { if(!(c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster))) continue; - c->SetInChamber(); new((*fClusters)[ncl++]) AliTRDcluster(*c); delete (clusterArray->RemoveAt(iCluster)); } @@ -1705,7 +1891,7 @@ Int_t AliTRDtrackerV1::LoadClusters(TTree *cTree) // Fills clusters into TRD tracking sectors // - if(!fReconstructor->IsWritingClusters()){ + if(!fkReconstructor->IsWritingClusters()){ fClusters = AliTRDReconstructor::GetClusters(); } else { if (ReadClusters(fClusters, cTree)) { @@ -1730,7 +1916,7 @@ Int_t AliTRDtrackerV1::LoadClusters(TTree *cTree) } //_____________________________________________________________________________ -Int_t AliTRDtrackerV1::LoadClusters(TClonesArray *clusters) +Int_t AliTRDtrackerV1::LoadClusters(TClonesArray * const clusters) { // // Fills clusters into TRD tracking sectors @@ -1763,6 +1949,7 @@ Int_t AliTRDtrackerV1::BuildTrackingContainers() while (icl--) { AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(icl); if(c->IsInChamber()) nin++; + if(fkReconstructor->IsHLT()) c->SetRPhiMethod(AliTRDcluster::kCOG); Int_t detector = c->GetDetector(); Int_t sector = fGeom->GetSector(detector); Int_t stack = fGeom->GetStack(detector); @@ -1774,7 +1961,7 @@ Int_t AliTRDtrackerV1::BuildTrackingContainers() const AliTRDCalDet *cal = AliTRDcalibDB::Instance()->GetT0Det(); for(int isector =0; isectorDelete(); - if(fTracklets) fTracklets->Delete(); +// +// Clears the arrays of clusters and tracks. Resets sectors and timebins +// If option "force" is also set the containers are also deleted. This is useful +// in case of HLT + + if(fTracks){ + fTracks->Delete(); + if(HasRemoveContainers()){delete fTracks; fTracks = NULL;} + } + if(fTracklets){ + fTracklets->Delete(); + if(HasRemoveContainers()){delete fTracklets; fTracklets = NULL;} + } if(fClusters){ if(IsClustersOwner()) fClusters->Delete(); // save clusters array in the reconstructor for further use. - if(!fReconstructor->IsWritingClusters()){ + if(!fkReconstructor->IsWritingClusters()){ AliTRDReconstructor::SetClusters(fClusters); SetClustersOwner(kFALSE); - } else AliTRDReconstructor::SetClusters(0x0); + } else AliTRDReconstructor::SetClusters(NULL); } for (int i = 0; i < AliTRDgeometry::kNsector; i++) fTrSec[i].Clear(); @@ -1813,10 +2007,10 @@ void AliTRDtrackerV1::UnloadClusters() // const AliTRDtrackV1 *track = dynamic_cast(t); // if(!track) return; // -// AliTRDseedV1 *tracklet = 0x0; +// AliTRDseedV1 *tracklet = NULL; // for(Int_t ily=AliTRDgeometry::kNlayer; ily--;){ // if(!(tracklet = track->GetTracklet(ily))) continue; -// AliTRDcluster *c = 0x0; +// AliTRDcluster *c = NULL; // for(Int_t ic=AliTRDseed::kNclusters; ic--;){ // if(!(c=tracklet->GetClusters(ic))) continue; // c->Use(); @@ -1826,7 +2020,7 @@ void AliTRDtrackerV1::UnloadClusters() // //_____________________________________________________________________________ -Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *track) +Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *const track) { // // Rotates the track when necessary @@ -1853,7 +2047,7 @@ Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *track) //____________________________________________________________________ -AliTRDseedV1* AliTRDtrackerV1::GetTracklet(AliTRDtrackV1 *track, Int_t p, Int_t &idx) +AliTRDseedV1* AliTRDtrackerV1::GetTracklet(AliTRDtrackV1 *const track, Int_t p, Int_t &idx) { // Find tracklet for TRD track // Parameters @@ -1867,13 +2061,13 @@ AliTRDseedV1* AliTRDtrackerV1::GetTracklet(AliTRDtrackV1 *track, Int_t p, Int_t // Detailed description // idx = track->GetTrackletIndex(p); - AliTRDseedV1 *tracklet = (idx==0xffff) ? 0x0 : (AliTRDseedV1*)fTracklets->UncheckedAt(idx); + AliTRDseedV1 *tracklet = (idx<0) ? NULL : (AliTRDseedV1*)fTracklets->UncheckedAt(idx); return tracklet; } //____________________________________________________________________ -AliTRDseedV1* AliTRDtrackerV1::SetTracklet(AliTRDseedV1 *tracklet) +AliTRDseedV1* AliTRDtrackerV1::SetTracklet(const AliTRDseedV1 * const tracklet) { // Add this tracklet to the list of tracklets stored in the tracker // @@ -1896,7 +2090,39 @@ AliTRDseedV1* AliTRDtrackerV1::SetTracklet(AliTRDseedV1 *tracklet) } //____________________________________________________________________ -AliTRDtrackV1* AliTRDtrackerV1::SetTrack(AliTRDtrackV1 *track) +void AliTRDtrackerV1::CookNTimeBins() +{ + // Initialize number of time bins + + if(fgNTimeBins){ + // first look if set by hand + AliDebug(2, Form("NTimeBins [%d] (set by user)", fgNTimeBins)); + } else if(fkReconstructor && fkReconstructor->HasDigitsParam()) { + // second look into digits param to avoid DB query + fgNTimeBins = fkReconstructor->GetDigitsParam()->GetNTimeBins(); + if(fgNTimeBins>0) AliDebug(2, Form("NTimeBins [%d] (set from digits param)", fgNTimeBins)); + else AliWarning(Form("NTimeBins [%d] failed from digits param.", fgNTimeBins)); + } + + if(!fgNTimeBins){ // third query DB + AliTRDcalibDB *trd(NULL); + if((trd = AliTRDcalibDB::Instance())) { + if((fgNTimeBins = trd->GetNumberOfTimeBinsDCS()) <= 0){ + AliError("Corrupted DCS Object in OCDB"); + fgNTimeBins = 24; + AliDebug(2, Form("NTimeBins [%d] (set to default 24)", fgNTimeBins)); + } else AliDebug(2, Form("NTimeBins [%d] (set from DB)", fgNTimeBins)); + } else AliFatal("Could not get DB."); + } + + if(fgNTimeBins<=0){ + AliError("NTimeBins failed all settings. Use default 24 !"); + fgNTimeBins = 24; + } +} + +//____________________________________________________________________ +AliTRDtrackV1* AliTRDtrackerV1::SetTrack(const AliTRDtrackV1 * const track) { // Add this track to the list of tracks stored in the tracker // @@ -1942,39 +2168,52 @@ Int_t AliTRDtrackerV1::Clusters2TracksSM(Int_t sector, AliESDEvent *esd) // 3. Pack results in the ESD event. // - // allocate space for esd tracks in this SM - TClonesArray esdTrackList("AliESDtrack", 2*kMaxTracksStack); - esdTrackList.SetOwner(); - Int_t nTracks = 0; Int_t nChambers = 0; - AliTRDtrackingChamber **stack = 0x0, *chamber = 0x0; + AliTRDtrackingChamber **stack = NULL, *chamber = NULL; for(int istack = 0; istackGetNClusters() < fgNTimeBins * fReconstructor->GetRecoParam() ->GetFindableClusters()) continue; + if(chamber->GetNClusters() < fgNTimeBins * fkReconstructor->GetRecoParam() ->GetFindableClusters()) continue; nChambers++; //AliInfo(Form("sector %d stack %d layer %d clusters %d", sector, istack, ilayer, chamber->GetNClusters())); } if(nChambers < 4) continue; //AliInfo(Form("Doing stack %d", istack)); - nTracks += Clusters2TracksStack(stack, &esdTrackList); + nTracks += Clusters2TracksStack(stack, fTracksESD); + } + if(nTracks) AliDebug(2, Form("Number of tracks: SM_%02d[%d]", sector, nTracks)); + + for(int itrack=0; itrackoperator[](itrack))); + Int_t id = esd->AddTrack(esdTrack); + + // set ESD id to stand alone TRD tracks + if (fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0){ + esdTrack=esd->GetTrack(id); + TObject *o(NULL); Int_t ic(0); + AliTRDtrackV1 *calibTrack(NULL); + while((o = esdTrack->GetCalibObject(ic++))){ + if(!(calibTrack = dynamic_cast(o))) continue; + calibTrack->SetESDid(esdTrack->GetID()); + break; + } + } } - //AliInfo(Form("Found %d tracks in SM %d [%d]\n", nTracks, sector, esd->GetNumberOfTracks())); - - for(int itrack=0; itrackAddTrack((AliESDtrack*)esdTrackList[itrack]); // Reset Track and Candidate Number AliTRDtrackerDebug::SetCandidateNumber(0); AliTRDtrackerDebug::SetTrackNumber(0); + + // delete ESD tracks in the array + fTracksESD->Delete(); return nTracks; } //____________________________________________________________________ -Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray *esdTrackList) +Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray * const esdTrackList) { // // Make tracks in one TRD stack. @@ -2003,8 +2242,8 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon // const AliTRDCalDet *cal = AliTRDcalibDB::Instance()->GetT0Det(); - AliTRDtrackingChamber *chamber = 0x0; - AliTRDtrackingChamber **ci = 0x0; + AliTRDtrackingChamber *chamber = NULL; + AliTRDtrackingChamber **ci = NULL; AliTRDseedV1 sseed[kMaxTracksStack*6]; // to be initialized Int_t pars[4]; // MakeSeeds parameters @@ -2021,7 +2260,7 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon // Build initial seeding configurations Double_t quality = BuildSeedingConfigs(stack, configs); - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10){ + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 10){ AliInfo(Form("Plane config %d %d %d Quality %f" , configs[0], configs[1], configs[2], quality)); } @@ -2047,9 +2286,10 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon pars[1] = ntracks; pars[2] = istack; ntracks = MakeSeeds(stack, &sseed[6*ntracks], pars); + //AliInfo(Form("Number of Tracks after iteration step %d: %d\n", iconf, ntracks)); if(ntracks == kMaxTracksStack) break; } - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10) AliInfo(Form("Candidate TRD tracks %d in iteration %d.", ntracks, fSieveSeeding)); + AliDebug(2, Form("Candidate TRD tracks %d in iteration %d.", ntracks, fSieveSeeding)); if(!ntracks) break; @@ -2069,7 +2309,7 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon // Sieve clusters in decreasing order of track quality Double_t trackParams[7]; - // AliTRDseedV1 *lseed = 0x0; + // AliTRDseedV1 *lseed = NULL; Int_t jSieve = 0, candidates; do{ //AliInfo(Form("\t\tITER = %i ", jSieve)); @@ -2103,7 +2343,7 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon fakeTrack[trackIndex] = kTRUE; continue; } - if (Float_t(nused)/ncl >= .25){ + if (ncl>0 && Float_t(nused)/ncl >= .25){ //printf("Skip %d nused/ncl >= .25\n", trackIndex); fakeTrack[trackIndex] = kTRUE; continue; @@ -2138,9 +2378,10 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon } if(skip){ candidates++; - //printf("REJECTED : %d [%d] nlayers %d trackQuality = %e nused %d\n", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused); + AliDebug(4, Form("REJECTED : %d idx[%d] quality[%e] tracklets[%d] usedClusters[%d]", itrack, trackIndex, fTrackQuality[trackIndex], nlayers, nused)); continue; - } + } else AliDebug(4, Form("ACCEPTED : %d idx[%d] quality[%e] tracklets[%d] usedClusters[%d]", itrack, trackIndex, fTrackQuality[trackIndex], nlayers, nused)); + signedTrack[trackIndex] = kTRUE; // Build track parameters @@ -2160,18 +2401,17 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon Int_t ich = 0; while(!(chamber = stack[ich])) ich++; trackParams[6] = fGeom->GetSector(chamber->GetDetector());/* *alpha+shift; // Supermodule*/ - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()){ //AliInfo(Form("Track %d [%d] nlayers %d trackQuality = %e nused %d, yref = %3.3f", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused, trackParams[1])); AliTRDseedV1 *dseed[6]; for(Int_t iseed = AliTRDgeometry::kNlayer; iseed--;) dseed[iseed] = new AliTRDseedV1(lseed[iseed]); //Int_t eventNrInFile = esd->GetEventNumberInFile(); - //AliInfo(Form("Number of clusters %d.", nclusters)); Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t trackNumber = AliTRDtrackerDebug::GetTrackNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); cstreamer << "Clusters2TracksStack" << "EventNumber=" << eventNumber << "TrackNumber=" << trackNumber @@ -2200,7 +2440,7 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon AliTRDtrackV1 *track = MakeTrack(&sseed[trackIndex*kNPlanes], trackParams); if(!track){ - AliWarning("Fail to build a TRD Track."); + AliDebug(1, "Track building failed."); continue; } @@ -2210,7 +2450,7 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon esdTrack->SetLabel(track->GetLabel()); track->UpdateESDtrack(esdTrack); // write ESD-friends if neccessary - if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ + if (fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 0){ AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(*track); calibTrack->SetOwner(); esdTrack->AddCalibObject(calibTrack); @@ -2226,19 +2466,19 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon // increment counters ntracks2 += ntracks1; - if(fReconstructor->IsHLT()) break; + if(fkReconstructor->IsHLT()) break; fSieveSeeding++; // Rebuild plane configurations and indices taking only unused clusters into account quality = BuildSeedingConfigs(stack, configs); - if(quality < 1.E-7) break; //fReconstructor->GetRecoParam() ->GetPlaneQualityThreshold()) break; + if(quality < 1.E-7) break; //fkReconstructor->GetRecoParam() ->GetPlaneQualityThreshold()) break; for(Int_t ip = 0; ip < kNPlanes; ip++){ if(!(chamber = stack[ip])) continue; chamber->Build(fGeom, cal);//Indices(fSieveSeeding); } - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10){ + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 10){ AliInfo(Form("Sieve level %d Plane config %d %d %d Quality %f", fSieveSeeding, configs[0], configs[1], configs[2], quality)); } } while(fSieveSeeding<10); // end stack clusters sieve @@ -2278,7 +2518,7 @@ Double_t AliTRDtrackerV1::BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int // Double_t chamberQ[kNPlanes];memset(chamberQ, 0, kNPlanes*sizeof(Double_t)); - AliTRDtrackingChamber *chamber = 0x0; + AliTRDtrackingChamber *chamber = NULL; for(int iplane=0; iplaneGetQuality() : 0.; @@ -2301,59 +2541,70 @@ Double_t AliTRDtrackerV1::BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int } //____________________________________________________________________ -Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *sseed, Int_t *ipar) +Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 * const sseed, const Int_t * const ipar) { - // - // Make tracklet seeds in the TRD stack. - // - // Parameters : - // layers : Array of stack propagation layers containing clusters - // sseed : Array of empty tracklet seeds. On exit they are filled. - // ipar : Control parameters: - // ipar[0] -> seeding chambers configuration - // ipar[1] -> stack index - // ipar[2] -> number of track candidates found so far - // - // Output : - // Number of tracks candidates found. - // - // Detailed description - // - // The following steps are performed: - // 1. Select seeding layers from seeding chambers - // 2. Select seeding clusters from the seeding AliTRDpropagationLayerStack. - // The clusters are taken from layer 3, layer 0, layer 1 and layer 2, in - // this order. The parameters controling the range of accepted clusters in - // layer 0, 1, and 2 are defined in AliTRDchamberTimeBin::BuildCond(). - // 3. Helix fit of the cluster set. (see AliTRDtrackerFitter::FitRieman(AliTRDcluster**)) - // 4. Initialize seeding tracklets in the seeding chambers. - // 5. Filter 0. - // Chi2 in the Y direction less than threshold ... (1./(3. - sLayer)) - // Chi2 in the Z direction less than threshold ... (1./(3. - sLayer)) - // 6. Attach clusters to seeding tracklets and find linear approximation of - // the tracklet (see AliTRDseedV1::AttachClustersIter()). The number of used - // clusters used by current seeds should not exceed ... (25). - // 7. Filter 1. - // All 4 seeding tracklets should be correctly constructed (see - // AliTRDseedV1::AttachClustersIter()) - // 8. Helix fit of the seeding tracklets - // 9. Filter 2. - // Likelihood calculation of the fit. (See AliTRDtrackerV1::CookLikelihood() for details) - // 10. Extrapolation of the helix fit to the other 2 chambers: - // a) Initialization of extrapolation tracklet with fit parameters - // b) Helix fit of tracklets - // c) Attach clusters and linear interpolation to extrapolated tracklets - // d) Helix fit of tracklets - // 11. Improve seeding tracklets quality by reassigning clusters. - // See AliTRDtrackerV1::ImproveSeedQuality() for details. - // 12. Helix fit of all 6 seeding tracklets and chi2 calculation - // 13. Hyperplane fit and track quality calculation. See AliTRDtrackerFitter::FitHyperplane() for details. - // 14. Cooking labels for tracklets. Should be done only for MC - // 15. Register seeds. - // - - AliTRDtrackingChamber *chamber = 0x0; - AliTRDcluster *c[kNSeedPlanes] = {0x0, 0x0, 0x0, 0x0}; // initilize seeding clusters +// +// Seed tracklets and build candidate TRD tracks. The procedure is used during barrel tracking to account for tracks which are +// either missed by TPC prolongation or conversions inside the TRD volume. +// For stand alone tracking the procedure is used to estimate all tracks measured by TRD. +// +// Parameters : +// layers : Array of stack propagation layers containing clusters +// sseed : Array of empty tracklet seeds. On exit they are filled. +// ipar : Control parameters: +// ipar[0] -> seeding chambers configuration +// ipar[1] -> stack index +// ipar[2] -> number of track candidates found so far +// +// Output : +// Number of tracks candidates found. +// +// The following steps are performed: +// 1. Build seeding layers by collapsing all time bins from each of the four seeding chambers along the +// radial coordinate. See AliTRDtrackingChamber::GetSeedingLayer() for details. The chambers selection for seeding +// is described in AliTRDtrackerV1::Clusters2TracksStack(). +// 2. Using the seeding clusters from the seeding layer (step 1) build combinatorics using the following algorithm: +// - for each seeding cluster in the lower seeding layer find +// - all seeding clusters in the upper seeding layer inside a road defined by a given phi angle. The angle +// is calculated on the minimum pt of tracks from vertex accesible to the stand alone tracker. +// - for each pair of two extreme seeding clusters select middle upper cluster using roads defined externally by the +// reco params +// - select last seeding cluster as the nearest to the linear approximation of the track described by the first three +// seeding clusters. +// The implementation of road calculation and cluster selection can be found in the functions AliTRDchamberTimeBin::BuildCond() +// and AliTRDchamberTimeBin::GetClusters(). +// 3. Helix fit of the seeding clusters set. (see AliTRDtrackerFitter::FitRieman(AliTRDcluster**)). No tilt correction is +// performed at this level +// 4. Initialize seeding tracklets in the seeding chambers. +// 5. *Filter 0* Chi2 cut on the Y and Z directions. The threshold is set externally by the reco params. +// 6. Attach (true) clusters to seeding tracklets (see AliTRDseedV1::AttachClusters()) and fit tracklet (see +// AliTRDseedV1::Fit()). The number of used clusters used by current seeds should not exceed ... (25). +// 7. *Filter 1* Check if all 4 seeding tracklets are correctly constructed. +// 8. Helix fit of the clusters from the seeding tracklets with tilt correction. Refit tracklets using the new +// approximation of the track. +// 9. *Filter 2* Calculate likelihood of the track. (See AliTRDtrackerV1::CookLikelihood()). The following quantities are +// checked against the Riemann fit: +// - position resolution in y +// - angular resolution in the bending plane +// - likelihood of the number of clusters attached to the tracklet +// 10. Extrapolation of the helix fit to the other 2 chambers *non seeding* chambers: +// - Initialization of extrapolation tracklets with the fit parameters +// - Attach clusters to extrapolated tracklets +// - Helix fit of tracklets +// 11. Improve seeding tracklets quality by reassigning clusters based on the last parameters of the track +// See AliTRDtrackerV1::ImproveSeedQuality() for details. +// 12. Helix fit of all 6 seeding tracklets and chi2 calculation +// 13. Hyperplane fit and track quality calculation. See AliTRDtrackerFitter::FitHyperplane() for details. +// 14. Cooking labels for tracklets. Should be done only for MC +// 15. Register seeds. +// +// Authors: +// Marian Ivanov +// Alexandru Bercuci +// Markus Fasel + + AliTRDtrackingChamber *chamber = NULL; + AliTRDcluster *c[kNSeedPlanes] = {NULL, NULL, NULL, NULL}; // initilize seeding clusters AliTRDseedV1 *cseed = &sseed[0]; // initialize tracklets for first track Int_t ncl, mcl; // working variable for looping over clusters Int_t index[AliTRDchamberTimeBin::kMaxClustersLayer], jndex[AliTRDchamberTimeBin::kMaxClustersLayer]; @@ -2362,7 +2613,7 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss // chi2[1] = tracklet chi2 on the R direction Double_t chi2[4]; - // this should be data member of AliTRDtrack + // this should be data member of AliTRDtrack TODO Double_t seedQuality[kMaxTracksStack]; // unpack control parameters @@ -2370,14 +2621,14 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss Int_t ntracks = ipar[1]; Int_t istack = ipar[2]; Int_t planes[kNSeedPlanes]; GetSeedingConfig(config, planes); - Int_t planesExt[kNPlanes-kNSeedPlanes]; GetExtrapolationConfig(config, planesExt); + Int_t planesExt[kNPlanes-kNSeedPlanes]; GetExtrapolationConfig(config, planesExt); // Init chambers geometry Double_t hL[kNPlanes]; // Tilting angle Float_t padlength[kNPlanes]; // pad lenghts Float_t padwidth[kNPlanes]; // pad widths - AliTRDpadPlane *pp = 0x0; + AliTRDpadPlane *pp = NULL; for(int iplane=0; iplaneGetPadPlane(iplane, istack); hL[iplane] = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle()); @@ -2388,7 +2639,7 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss // Init anode wire position for chambers Double_t x0[kNPlanes], // anode wire position driftLength = .5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick(); // drift length - TGeoHMatrix *matrix = 0x0; + TGeoHMatrix *matrix = NULL; Double_t loc[] = {AliTRDgeometry::AnodePos(), 0., 0.}; Double_t glb[] = {0., 0., 0.}; AliTRDtrackingChamber **cIter = &stack[0]; @@ -2402,16 +2653,14 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss x0[iLayer] = glb[0]; } - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 10){ - AliInfo(Form("Making seeds Stack[%d] Config[%d] Tracks[%d]...", istack, config, ntracks)); - } + AliDebug(2, Form("Making seeds Stack[%d] Config[%d] Tracks[%d]...", istack, config, ntracks)); // Build seeding layers ResetSeedTB(); Int_t nlayers = 0; for(int isl=0; islGetSeedingLayer(fSeedTB[isl], fGeom, fReconstructor)) continue; + if(!chamber->GetSeedingLayer(fSeedTB[isl], fGeom, fkReconstructor)) continue; nlayers++; } if(nlayers < kNSeedPlanes) return ntracks; @@ -2430,9 +2679,9 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss c[0] = (*fSeedTB[0])[index[jcl++]]; if(!c[0]) continue; Double_t dx = c[3]->GetX() - c[0]->GetX(); - Double_t theta = (c[3]->GetZ() - c[0]->GetZ())/dx; - Double_t phi = (c[3]->GetY() - c[0]->GetY())/dx; - fSeedTB[1]->BuildCond(c[0], cond1, 1, theta, phi); + Double_t dzdx = (c[3]->GetZ() - c[0]->GetZ())/dx; + Double_t dydx = (c[3]->GetY() - c[0]->GetY())/dx; + fSeedTB[1]->BuildCond(c[0], cond1, 1, dzdx, dydx); fSeedTB[1]->GetClusters(cond1, jndex, mcl); //printf("Found c[0] candidates 1 %d\n", mcl); @@ -2440,13 +2689,16 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss while(kclBuildCond(c[1], cond2, 2, theta, phi); + fSeedTB[2]->BuildCond(c[1], cond2, 2, dzdx, dydx); c[2] = fSeedTB[2]->GetNearestCluster(cond2); //printf("Found c[1] candidate 2 %p\n", c[2]); if(!c[2]) continue; - - // AliInfo("Seeding clusters found. Building seeds ..."); - // for(Int_t i = 0; i < kNSeedPlanes; i++) printf("%i. coordinates: x = %6.3f, y = %6.3f, z = %6.3f\n", i, c[i]->GetX(), c[i]->GetY(), c[i]->GetZ()); + + AliDebug(3, Form("Seeding clusters\n 0[%6.3f %6.3f %6.3f]\n 1[%6.3f %6.3f %6.3f]\n 2[%6.3f %6.3f %6.3f]\n 3[%6.3f %6.3f %6.3f].", + c[0]->GetX(), c[0]->GetY(), c[0]->GetZ(), + c[1]->GetX(), c[1]->GetY(), c[1]->GetZ(), + c[2]->GetX(), c[2]->GetY(), c[2]->GetZ(), + c[3]->GetX(), c[3]->GetY(), c[3]->GetZ())); for (Int_t il = 0; il < kNPlanes; il++) cseed[il].Reset(); @@ -2460,14 +2712,14 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss tseed->SetTilt(hL[iLayer]); tseed->SetPadLength(padlength[iLayer]); tseed->SetPadWidth(padwidth[iLayer]); - tseed->SetReconstructor(fReconstructor); + tseed->SetReconstructor(fkReconstructor); tseed->SetX0(det<0 ? fR[iLayer]+driftLength : x0[iLayer]); tseed->Init(GetRiemanFitter()); tseed->SetStandAlone(kTRUE); } Bool_t isFake = kFALSE; - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) >= 2 && fkReconstructor->IsDebugStreaming()){ if (c[0]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; if (c[1]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; if (c[2]->GetLabel(0) != c[3]->GetLabel(0)) isFake = kTRUE; @@ -2480,7 +2732,7 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); AliRieman *rim = GetRiemanFitter(); - TTreeSRedirector &cs0 = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + TTreeSRedirector &cs0 = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); cs0 << "MakeSeeds0" <<"EventNumber=" << eventNumber <<"CandidateNumber=" << candidateNumber @@ -2510,41 +2762,55 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss <<"RiemanFitter.=" << rim <<"\n"; } - if(chi2[0] > fReconstructor->GetRecoParam() ->GetChi2Z()/*7./(3. - sLayer)*//*iter*/){ -// //AliInfo(Form("Failed chi2 filter on chi2Z [%f].", chi2[0])); + if(chi2[0] > fkReconstructor->GetRecoParam() ->GetChi2Z()/*7./(3. - sLayer)*//*iter*/){ + AliDebug(3, Form("Filter on chi2Z [%f].", chi2[0])); AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); continue; } - if(chi2[1] > fReconstructor->GetRecoParam() ->GetChi2Y()/*1./(3. - sLayer)*//*iter*/){ -// //AliInfo(Form("Failed chi2 filter on chi2Y [%f].", chi2[1])); + if(chi2[1] > fkReconstructor->GetRecoParam() ->GetChi2Y()/*1./(3. - sLayer)*//*iter*/){ + AliDebug(3, Form("Filter on chi2Y [%f].", chi2[1])); AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); continue; } //AliInfo("Passed chi2 filter."); // try attaching clusters to tracklets - Int_t mlayers = 0; + Int_t mlayers = 0; + AliTRDcluster *cl = NULL; for(int iLayer=0; iLayerIsHLT()*/kFALSE){ + cseed[jLayer].UpdateUsed(); + if(!cseed[jLayer].IsOK()) continue; + }else{ + cseed[jLayer].Fit(); + cseed[jLayer].UpdateUsed(); + cseed[jLayer].ResetClusterIter(); + while((cl = cseed[jLayer].NextCluster())){ + if(!cl->IsInChamber()) nNotInChamber++; + } + //printf("clusters[%d], used[%d], not in chamber[%d]\n", cseed[jLayer].GetN(), cseed[jLayer].GetNUsed(), nNotInChamber); + if(cseed[jLayer].GetN() - (cseed[jLayer].GetNUsed() + nNotInChamber) < 5) continue; // checking for Cluster which are not in chamber is a much stronger restriction on real data + } mlayers++; } if(mlayers < kNSeedPlanes){ - //AliInfo(Form("Failed updating all seeds %d [%d].", mlayers, kNSeedPlanes)); + AliDebug(2, Form("Found only %d tracklets out of %d. Skip.", mlayers, kNSeedPlanes)); AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); continue; } // temporary exit door for the HLT - if(fReconstructor->IsHLT()){ + if(fkReconstructor->IsHLT()){ // attach clusters to extrapolation chambers for(int iLayer=0; iLayerGetRecoParam() ->GetTrackLikelihood()){ - //AliInfo(Form("Failed likelihood %f[%e].", TMath::Log(1.E-9 + like), like)); + if (TMath::Log(1.E-9 + like) < fkReconstructor->GetRecoParam() ->GetTrackLikelihood()){ + AliDebug(3, Form("Filter on likelihood %f[%e].", TMath::Log(1.E-9 + like), like)); AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); continue; } @@ -2575,6 +2841,7 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss fSeedLayer[ntracks] = config;/*sLayer;*/ // attach clusters to the extrapolation seeds + Int_t elayers(0); for(int iLayer=0; iLayerGetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) >= 2 && fkReconstructor->IsDebugStreaming()){ + TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); TLinearFitter *tiltedRieman = GetTiltedRiemanFitter(); Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); @@ -2610,9 +2878,17 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss << "\n"; } - if(fReconstructor->GetRecoParam()->HasImproveTracklets() && ImproveSeedQuality(stack, cseed) < 4){ - AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); - continue; + if(fkReconstructor->GetRecoParam()->HasImproveTracklets()){ + AliTRDseedV1 bseed[AliTRDgeometry::kNlayer]; + for(Int_t jLayer=AliTRDgeometry::kNlayer; jLayer--;) bseed[jLayer] = cseed[jLayer]; + + if(ImproveSeedQuality(stack, cseed) < mlayers+elayers){ + AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); + AliDebug(3, "Filter on improve seeds."); + } else { + // store results + for(Int_t jLayer=AliTRDgeometry::kNlayer; jLayer--;) cseed[jLayer] = bseed[jLayer]; + } } //AliInfo("Improve seed quality done."); @@ -2623,8 +2899,8 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss // do the final track fitting (Once with vertex constraint and once without vertex constraint) Double_t chi2Vals[3]; - chi2Vals[0] = FitTiltedRieman(&cseed[0], kFALSE); - if(fReconstructor->GetRecoParam()->IsVertexConstrained()) + chi2Vals[0] = FitTiltedRieman(&cseed[0], kTRUE); + if(fkReconstructor->GetRecoParam()->IsVertexConstrained()) chi2Vals[1] = FitTiltedRiemanConstraint(&cseed[0], GetZ()); // Do Vertex Constrained fit if desired else chi2Vals[1] = 1.; @@ -2634,8 +2910,8 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss fTrackQuality[ntracks] = CalculateTrackLikelihood(&cseed[0], &chi2Vals[0]); //AliInfo("Hyperplane fit done\n"); - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) >= 2 && fkReconstructor->IsDebugStreaming()){ + TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); TLinearFitter *fitterTC = GetTiltedRiemanFitterConstraint(); @@ -2678,64 +2954,77 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss } //_____________________________________________________________________________ -AliTRDtrackV1* AliTRDtrackerV1::MakeTrack(AliTRDseedV1 *seeds, Double_t *params) +AliTRDtrackV1* AliTRDtrackerV1::MakeTrack(AliTRDseedV1 * 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 !! - // - +// +// Build a TRD track out of tracklet candidates +// +// Parameters : +// seeds : array of tracklets +// params : array of track parameters as they are estimated by stand alone tracker. 7 elements. +// [0] - radial position of the track at reference point +// [1] - y position of the fit at [0] +// [2] - z position of the fit at [0] +// [3] - snp of the first tracklet +// [4] - tgl of the first tracklet +// [5] - curvature of the Riemann fit - 1/pt +// [6] - sector rotation angle +// +// Output : +// The TRD track. +// +// Initialize the TRD track based on the parameters of the fit and a parametric covariance matrix +// (diagonal with constant variance terms TODO - correct parameterization) +// +// In case of HLT just register the tracklets in the tracker and return values of the Riemann fit. For the +// offline case perform a full Kalman filter on the already found tracklets (see AliTRDtrackerV1::FollowBackProlongation() +// for details). Do also MC label calculation and PID if propagation successfully. + 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; + c[ 0] = 0.2; // s^2_y + c[ 1] = 0.0; c[ 2] = 2.0; // s^2_z + c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02; // s^2_snp + c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1; // s^2_tgl + c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01; // s^2_1/pt AliTRDtrackV1 track(seeds, ¶ms[1], c, params[0], params[6]*alpha+shift); track.PropagateTo(params[0]-5.0); - AliTRDseedV1 *ptrTracklet = 0x0; - // Sign clusters - for (Int_t jLayer = 0; jLayer < AliTRDgeometry::kNlayer; jLayer++) { - ptrTracklet = &seeds[jLayer]; - if(!ptrTracklet->IsOK()) continue; - if(TMath::Abs(ptrTracklet->GetYref(1) - ptrTracklet->GetYfit(1)) >= .2) continue; // check this condition with Marian - } - // - if(fReconstructor->IsHLT()){ - for(Int_t ip=0; ipIsHLT()*/kFALSE){ + for (Int_t jLayer = 0; jLayer < AliTRDgeometry::kNlayer; jLayer++) { + track.UnsetTracklet(jLayer); + ptrTracklet = &seeds[jLayer]; + if(!ptrTracklet->IsOK()) continue; + if(TMath::Abs(ptrTracklet->GetYref(1) - ptrTracklet->GetYfit(1)) >= .2) continue; // check this condition with Marian + ptrTracklet = SetTracklet(ptrTracklet); ptrTracklet->UseClusters(); track.SetTracklet(ptrTracklet, fTracklets->GetEntriesFast()-1); } AliTRDtrackV1 *ptrTrack = SetTrack(&track); - ptrTrack->SetReconstructor(fReconstructor); + ptrTrack->CookPID(); + ptrTrack->CookLabel(.9); + ptrTrack->SetReconstructor(fkReconstructor); return ptrTrack; } + // prevent the error message in AliTracker::MeanMaterialBudget: "start point out of geometry" + if(TMath::Abs(track.GetX()) + TMath::Abs(track.GetY()) + TMath::Abs(track.GetZ()) > 10000) + return NULL; + track.ResetCovariance(1); Int_t nc = TMath::Abs(FollowBackProlongation(track)); - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 5){ + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) > 5 && fkReconstructor->IsDebugStreaming()){ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); Double_t p[5]; // Track Params for the Debug Stream track.GetExternalParameters(params[0], p); - TTreeSRedirector &cs = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + TTreeSRedirector &cs = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); cs << "MakeTrack" << "EventNumber=" << eventNumber << "CandidateNumber=" << candidateNumber @@ -2754,10 +3043,10 @@ AliTRDtrackV1* AliTRDtrackerV1::MakeTrack(AliTRDseedV1 *seeds, Double_t *params) << "track.=" << &track << "\n"; } - if (nc < 30) return 0x0; + if (nc < 30) return NULL; AliTRDtrackV1 *ptrTrack = SetTrack(&track); - ptrTrack->SetReconstructor(fReconstructor); + ptrTrack->SetReconstructor(fkReconstructor); ptrTrack->CookLabel(.9); // computes PID for track @@ -2795,66 +3084,87 @@ Int_t AliTRDtrackerV1::ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDs // // make a local working copy - AliTRDtrackingChamber *chamber = 0x0; - AliTRDseedV1 bseed[6]; - Int_t nLayers = 0; - for (Int_t jLayer = 0; jLayer < 6; jLayer++) bseed[jLayer] = cseed[jLayer]; - - Float_t lastquality = 10000.0; - Float_t lastchi2 = 10000.0; - Float_t chi2 = 1000.0; + AliTRDtrackingChamber *chamber = NULL; + AliTRDseedV1 bseed[AliTRDgeometry::kNlayer]; + + Float_t quality(0.), + lQuality[] = {1.e3, 1.e3, 1.e3, 1.e3, 1.e3, 1.e3}; + Int_t rLayers(0); + for(Int_t jLayer=AliTRDgeometry::kNlayer; jLayer--;){ + bseed[jLayer] = cseed[jLayer]; + if(!bseed[jLayer].IsOK()) continue; + rLayers++; + lQuality[jLayer] = bseed[jLayer].GetQuality(kTRUE); + quality += lQuality[jLayer]; + } + Float_t chi2 = FitTiltedRieman(bseed, kTRUE); for (Int_t iter = 0; iter < 4; iter++) { - Float_t sumquality = 0.0; - Float_t squality[6]; - Int_t sortindexes[6]; - - for (Int_t jLayer = 0; jLayer < 6; jLayer++) { - squality[jLayer] = bseed[jLayer].IsOK() ? bseed[jLayer].GetQuality(kTRUE) : 1000.; - sumquality += squality[jLayer]; - } - if ((sumquality >= lastquality) || (chi2 > lastchi2)) break; - - nLayers = 0; - lastquality = sumquality; - lastchi2 = chi2; - if (iter > 0) for (Int_t jLayer = 0; jLayer < 6; jLayer++) cseed[jLayer] = bseed[jLayer]; - - TMath::Sort(6, squality, sortindexes, kFALSE); - for (Int_t jLayer = 5; jLayer > 1; jLayer--) { - Int_t bLayer = sortindexes[jLayer]; + AliDebug(2, Form("Iter[%d] Q[%f] chi2[%f]", iter, quality, chi2)); + + // Try better cluster set + Int_t nLayers(0); Float_t qualitynew(0.); + Int_t indexes[6]; + TMath::Sort(Int_t(AliTRDgeometry::kNlayer), lQuality, indexes, kFALSE); + for(Int_t jLayer=AliTRDgeometry::kNlayer; jLayer--;) { + Int_t bLayer = indexes[jLayer]; + bseed[bLayer].Reset("c"); if(!(chamber = stack[bLayer])) continue; - bseed[bLayer].AttachClusters(chamber, kTRUE); + if(!bseed[bLayer].AttachClusters(chamber, kTRUE)) continue; bseed[bLayer].Fit(kTRUE); - if(bseed[bLayer].IsOK()) nLayers++; + if(!bseed[bLayer].IsOK()) continue; + nLayers++; + lQuality[jLayer] = bseed[jLayer].GetQuality(kTRUE); + qualitynew += lQuality[jLayer]; } + if(rLayers > nLayers){ + AliDebug(1, Form("Lost %d tracklets while improving.", rLayers-nLayers)); + break; + } else rLayers=nLayers; - chi2 = FitTiltedRieman(bseed, kTRUE); - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 7){ + if(qualitynew >= quality){ + AliDebug(4, Form("Quality worsen in iter[%d].", iter)); + break; + } else quality = qualitynew; + + // try improve track parameters + AliTRDseedV1 tseed[AliTRDgeometry::kNlayer]; + for(Int_t jLayer=AliTRDgeometry::kNlayer; jLayer--;) tseed[jLayer]=bseed[jLayer]; + Float_t chi2new = FitTiltedRieman(tseed, kTRUE); + if(chi2new > chi2){ + AliDebug(4, Form("Chi2 worsen in iter[%d].", iter)); + break; + } else chi2 = chi2new; + + // store better tracklets + for(Int_t jLayer=AliTRDgeometry::kNlayer; jLayer--;) bseed[jLayer]=tseed[jLayer]; + + + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) >= 7 && fkReconstructor->IsDebugStreaming()){ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); TLinearFitter *tiltedRieman = GetTiltedRiemanFitter(); - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); cstreamer << "ImproveSeedQuality" - << "EventNumber=" << eventNumber - << "CandidateNumber=" << candidateNumber - << "Iteration=" << iter - << "S0.=" << &bseed[0] - << "S1.=" << &bseed[1] - << "S2.=" << &bseed[2] - << "S3.=" << &bseed[3] - << "S4.=" << &bseed[4] - << "S5.=" << &bseed[5] - << "FitterT.=" << tiltedRieman - << "\n"; + << "EventNumber=" << eventNumber + << "CandidateNumber=" << candidateNumber + << "Iteration=" << iter + << "S0.=" << &bseed[0] + << "S1.=" << &bseed[1] + << "S2.=" << &bseed[2] + << "S3.=" << &bseed[3] + << "S4.=" << &bseed[4] + << "S5.=" << &bseed[5] + << "FitterT.=" << tiltedRieman + << "\n"; } } // Loop: iter // we are sure that at least 2 tracklets are OK ! - return nLayers+2; + return rLayers; } //_________________________________________________________________________ -Double_t AliTRDtrackerV1::CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2){ +Double_t AliTRDtrackerV1::CalculateTrackLikelihood(const AliTRDseedV1 *const tracklets, Double_t *chi2){ // // Calculates the Track Likelihood value. This parameter serves as main quality criterion for // the track selection @@ -2882,16 +3192,16 @@ Double_t AliTRDtrackerV1::CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Doub chi2phi /= Float_t (nLayers - 2.0); Double_t likeChi2Z = TMath::Exp(-chi2[2] * 0.14); // Chi2Z - Double_t likeChi2TC = (fReconstructor->GetRecoParam() ->IsVertexConstrained()) ? + Double_t likeChi2TC = (fkReconstructor->GetRecoParam()->IsVertexConstrained()) ? TMath::Exp(-chi2[1] * 0.677) : 1; // Constrained Tilted Riemann - Double_t likeChi2TR = TMath::Exp(-chi2[0] * 0.78); // Non-constrained Tilted Riemann - Double_t likeChi2Phi= TMath::Exp(-chi2phi * 3.23); + Double_t likeChi2TR = TMath::Exp(-chi2[0] * 0.0078); // Non-constrained Tilted Riemann + Double_t likeChi2Phi= TMath::Exp(-chi2phi * 3.23);//3.23 Double_t trackLikelihood = likeChi2Z * likeChi2TR * likeChi2Phi; - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) >= 2 && fkReconstructor->IsDebugStreaming()){ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); cstreamer << "CalculateTrackLikelihood0" << "EventNumber=" << eventNumber << "CandidateNumber=" << candidateNumber @@ -2902,7 +3212,7 @@ Double_t AliTRDtrackerV1::CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Doub << "TrackLikelihood=" << trackLikelihood << "\n"; } - + return trackLikelihood; } @@ -2934,7 +3244,7 @@ Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]) // // ratio of the total number of clusters/track which are expected to be found by the tracker. - const AliTRDrecoParam *fRecoPars = fReconstructor->GetRecoParam(); + const AliTRDrecoParam *fRecoPars = fkReconstructor->GetRecoParam(); Double_t chi2y = GetChi2Y(&cseed[0]); Double_t chi2z = GetChi2Z(&cseed[0]); @@ -2950,24 +3260,23 @@ Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]) Double_t likea = TMath::Exp(-sumda * fRecoPars->GetPhiSlope()); Double_t likechi2y = 0.0000000001; - if (fReconstructor->IsCosmic() || chi2y < fRecoPars->GetChi2YCut()) likechi2y += TMath::Exp(-TMath::Sqrt(chi2y) * fRecoPars->GetChi2YSlope()); + if (fkReconstructor->IsCosmic() || chi2y < fRecoPars->GetChi2YCut()) likechi2y += TMath::Exp(-TMath::Sqrt(chi2y) * fRecoPars->GetChi2YSlope()); Double_t likechi2z = TMath::Exp(-chi2z * fRecoPars->GetChi2ZSlope()); Double_t likeN = TMath::Exp(-(fRecoPars->GetNMeanClusters() - nclusters) / fRecoPars->GetNSigmaClusters()); Double_t like = likea * likechi2y * likechi2z * likeN; - // AliInfo(Form("sumda(%f) chi2[0](%f) chi2[1](%f) likea(%f) likechi2y(%f) likechi2z(%f) nclusters(%d) likeN(%f)", sumda, chi2[0], chi2[1], likea, likechi2y, likechi2z, nclusters, likeN)); - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ + if(fkReconstructor->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) >= 2 && fkReconstructor->IsDebugStreaming()){ Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); - Int_t nTracklets = 0; Float_t mean_ncls = 0; + Int_t nTracklets = 0; Float_t meanNcls = 0; for(Int_t iseed=0; iseed < kNPlanes; iseed++){ if(!cseed[iseed].IsOK()) continue; nTracklets++; - mean_ncls += cseed[iseed].GetN2(); + meanNcls += cseed[iseed].GetN2(); } - if(nTracklets) mean_ncls /= nTracklets; + if(nTracklets) meanNcls /= nTracklets; // The Debug Stream contains the seed - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); cstreamer << "CookLikelihood" << "EventNumber=" << eventNumber << "CandidateNumber=" << candidateNumber @@ -2986,7 +3295,7 @@ Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]) << "nclusters=" << nclusters << "likeN=" << likeN << "like=" << like - << "meanncls=" << mean_ncls + << "meanncls=" << meanNcls << "\n"; } @@ -3217,76 +3526,28 @@ void AliTRDtrackerV1::GetExtrapolationConfig(Int_t iconfig, Int_t planes[2]) //____________________________________________________________________ AliCluster* AliTRDtrackerV1::GetCluster(Int_t idx) const { + if(!fClusters) return NULL; Int_t ncls = fClusters->GetEntriesFast(); - return idx >= 0 && idx < ncls ? (AliCluster*)fClusters->UncheckedAt(idx) : 0x0; + return idx >= 0 && idx < ncls ? (AliCluster*)fClusters->UncheckedAt(idx) : NULL; } //____________________________________________________________________ AliTRDseedV1* AliTRDtrackerV1::GetTracklet(Int_t idx) const { + if(!fTracklets) return NULL; Int_t ntrklt = fTracklets->GetEntriesFast(); - return idx >= 0 && idx < ntrklt ? (AliTRDseedV1*)fTracklets->UncheckedAt(idx) : 0x0; + return idx >= 0 && idx < ntrklt ? (AliTRDseedV1*)fTracklets->UncheckedAt(idx) : NULL; } //____________________________________________________________________ AliKalmanTrack* AliTRDtrackerV1::GetTrack(Int_t idx) const { + if(!fTracks) return NULL; Int_t ntrk = fTracks->GetEntriesFast(); - return idx >= 0 && idx < ntrk ? (AliKalmanTrack*)fTracks->UncheckedAt(idx) : 0x0; + return idx >= 0 && idx < ntrk ? (AliKalmanTrack*)fTracks->UncheckedAt(idx) : NULL; } -//____________________________________________________________________ -Float_t AliTRDtrackerV1::CalculateReferenceX(AliTRDseedV1 *tracklets){ - // - // Calculates the reference x-position for the tilted Rieman fit defined as middle - // of the stack (middle between layers 2 and 3). For the calculation all the tracklets - // are taken into account - // - // Parameters: - Array of tracklets(AliTRDseedV1) - // - // Output: - The reference x-position(Float_t) - // - Int_t nDistances = 0; - Float_t meanDistance = 0.; - Int_t startIndex = 5; - for(Int_t il =5; il > 0; il--){ - if(tracklets[il].IsOK() && tracklets[il -1].IsOK()){ - Float_t xdiff = tracklets[il].GetX0() - tracklets[il -1].GetX0(); - meanDistance += xdiff; - nDistances++; - } - if(tracklets[il].IsOK()) startIndex = il; - } - if(tracklets[0].IsOK()) startIndex = 0; - if(!nDistances){ - // We should normally never get here - Float_t xpos[2]; memset(xpos, 0, sizeof(Float_t) * 2); - Int_t iok = 0, idiff = 0; - // This attempt is worse and should be avoided: - // check for two chambers which are OK and repeat this without taking the mean value - // Strategy avoids a division by 0; - for(Int_t il = 5; il >= 0; il--){ - if(tracklets[il].IsOK()){ - xpos[iok] = tracklets[il].GetX0(); - iok++; - startIndex = il; - } - if(iok) idiff++; // to get the right difference; - if(iok > 1) break; - } - if(iok > 1){ - meanDistance = (xpos[0] - xpos[1])/idiff; - } - else{ - // we have do not even have 2 layers which are OK? The we do not need to fit at all - return 331.; - } - } - else{ - meanDistance /= nDistances; - } - return tracklets[startIndex].GetX0() + (2.5 - startIndex) * meanDistance - 0.5 * (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); -} + // //_____________________________________________________________________________ // Int_t AliTRDtrackerV1::Freq(Int_t n, const Int_t *inlist @@ -3362,7 +3623,7 @@ void AliTRDtrackerV1::ResetSeedTB() //_____________________________________________________________________________ -Float_t AliTRDtrackerV1::GetChi2Y(AliTRDseedV1 *tracklets) const +Float_t AliTRDtrackerV1::GetChi2Y(const AliTRDseedV1 * const tracklets) const { // Calculates normalized chi2 in y-direction // chi2 = Sum chi2 / n_tracklets @@ -3377,7 +3638,7 @@ Float_t AliTRDtrackerV1::GetChi2Y(AliTRDseedV1 *tracklets) const } //_____________________________________________________________________________ -Float_t AliTRDtrackerV1::GetChi2Z(AliTRDseedV1 *tracklets) const +Float_t AliTRDtrackerV1::GetChi2Z(const AliTRDseedV1 *const tracklets) const { // Calculates normalized chi2 in z-direction // chi2 = Sum chi2 / n_tracklets @@ -3391,6 +3652,88 @@ Float_t AliTRDtrackerV1::GetChi2Z(AliTRDseedV1 *tracklets) const return n ? chi2/n : 0.; } +//____________________________________________________________________ +Float_t AliTRDtrackerV1::CalculateReferenceX(const AliTRDseedV1 *const tracklets){ + // + // Calculates the reference x-position for the tilted Rieman fit defined as middle + // of the stack (middle between layers 2 and 3). For the calculation all the tracklets + // are taken into account + // + // Parameters: - Array of tracklets(AliTRDseedV1) + // + // Output: - The reference x-position(Float_t) + // Only kept for compatibility with the old code + // + Int_t nDistances = 0; + Float_t meanDistance = 0.; + Int_t startIndex = 5; + for(Int_t il =5; il > 0; il--){ + if(tracklets[il].IsOK() && tracklets[il -1].IsOK()){ + Float_t xdiff = tracklets[il].GetX0() - tracklets[il -1].GetX0(); + meanDistance += xdiff; + nDistances++; + } + if(tracklets[il].IsOK()) startIndex = il; + } + if(tracklets[0].IsOK()) startIndex = 0; + if(!nDistances){ + // We should normally never get here + Float_t xpos[2]; memset(xpos, 0, sizeof(Float_t) * 2); + Int_t iok = 0, idiff = 0; + // This attempt is worse and should be avoided: + // check for two chambers which are OK and repeat this without taking the mean value + // Strategy avoids a division by 0; + for(Int_t il = 5; il >= 0; il--){ + if(tracklets[il].IsOK()){ + xpos[iok] = tracklets[il].GetX0(); + iok++; + startIndex = il; + } + if(iok) idiff++; // to get the right difference; + if(iok > 1) break; + } + if(iok > 1){ + meanDistance = (xpos[0] - xpos[1])/idiff; + } + else{ + // we have do not even have 2 layers which are OK? The we do not need to fit at all + return 331.; + } + } + else{ + meanDistance /= nDistances; + } + return tracklets[startIndex].GetX0() + (2.5 - startIndex) * meanDistance - 0.5 * (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); +} + +//_____________________________________________________________________________ +Double_t AliTRDtrackerV1::FitTiltedRiemanV1(AliTRDseedV1 *const tracklets){ + // + // Track Fitter Function using the new class implementation of + // the Rieman fit + // + AliTRDtrackFitterRieman fitter; + fitter.SetRiemanFitter(GetTiltedRiemanFitter()); + fitter.Reset(); + for(Int_t il = 0; il < AliTRDgeometry::kNlayer; il++) fitter.SetTracklet(il, &tracklets[il]); + Double_t chi2 = fitter.Eval(); + // Update the tracklets + Double_t cov[15]; Double_t x0; + memset(cov, 0, sizeof(Double_t) * 15); + for(Int_t il = 0; il < AliTRDgeometry::kNlayer; il++){ + x0 = tracklets[il].GetX0(); + tracklets[il].SetYref(0, fitter.GetYat(x0)); + tracklets[il].SetZref(0, fitter.GetZat(x0)); + tracklets[il].SetYref(1, fitter.GetDyDxAt(x0)); + tracklets[il].SetZref(1, fitter.GetDzDx()); + tracklets[il].SetC(fitter.GetCurvature()); + fitter.GetCovAt(x0, cov); + tracklets[il].SetCovRef(cov); + tracklets[il].SetChi2(chi2); + } + return chi2; +} + /////////////////////////////////////////////////////// // // // Resources of class AliTRDLeastSquare // @@ -3399,22 +3742,41 @@ Float_t AliTRDtrackerV1::GetChi2Z(AliTRDseedV1 *tracklets) const //_____________________________________________________________________________ AliTRDtrackerV1::AliTRDLeastSquare::AliTRDLeastSquare(){ - // - // Constructor of the nested class AliTRDtrackFitterLeastSquare - // +// +// Constructor of the nested class AliTRDtrackFitterLeastSquare +// +// Fast solving linear regresion in 2D +// y=a + bx +// The data members have the following meaning +// fParams[0] : a +// fParams[1] : b +// +// fSums[0] : S +// fSums[1] : Sx +// fSums[2] : Sy +// fSums[3] : Sxy +// fSums[4] : Sxx +// fSums[5] : Syy +// +// fCovarianceMatrix[0] : s2a +// fCovarianceMatrix[1] : s2b +// fCovarianceMatrix[2] : cov(ab) + memset(fParams, 0, sizeof(Double_t) * 2); - memset(fSums, 0, sizeof(Double_t) * 5); + memset(fSums, 0, sizeof(Double_t) * 6); memset(fCovarianceMatrix, 0, sizeof(Double_t) * 3); } //_____________________________________________________________________________ -void AliTRDtrackerV1::AliTRDLeastSquare::AddPoint(Double_t *x, Double_t y, Double_t sigmaY){ +void AliTRDtrackerV1::AliTRDLeastSquare::AddPoint(const Double_t *const x, Double_t y, Double_t sigmaY){ // // Adding Point to the fitter // - Double_t weight = 1/(sigmaY * sigmaY); - Double_t &xpt = *x; + + Double_t weight = 1/(sigmaY > 1e-9 ? sigmaY : 1e-9); + weight *= weight; + const Double_t &xpt = *x; // printf("Adding point x = %f, y = %f, sigma = %f\n", xpt, y, sigmaY); fSums[0] += weight; fSums[1] += weight * xpt; @@ -3425,12 +3787,14 @@ void AliTRDtrackerV1::AliTRDLeastSquare::AddPoint(Double_t *x, Double_t y, Doubl } //_____________________________________________________________________________ -void AliTRDtrackerV1::AliTRDLeastSquare::RemovePoint(Double_t *x, Double_t y, Double_t sigmaY){ +void AliTRDtrackerV1::AliTRDLeastSquare::RemovePoint(const Double_t *const x, Double_t y, Double_t sigmaY){ // // Remove Point from the sample // - Double_t weight = 1/(sigmaY * sigmaY); - Double_t &xpt = *x; + + Double_t weight = 1/(sigmaY > 1e-9 ? sigmaY : 1e-9); + weight *= weight; + const Double_t &xpt = *x; fSums[0] -= weight; fSums[1] -= weight * xpt; fSums[2] -= weight * y; @@ -3440,31 +3804,39 @@ void AliTRDtrackerV1::AliTRDLeastSquare::RemovePoint(Double_t *x, Double_t y, Do } //_____________________________________________________________________________ -void AliTRDtrackerV1::AliTRDLeastSquare::Eval(){ +Bool_t AliTRDtrackerV1::AliTRDLeastSquare::Eval(){ // // Evaluation of the fit: // Calculation of the parameters // Calculation of the covariance matrix // - Double_t denominator = fSums[0] * fSums[4] - fSums[1] *fSums[1]; - if(denominator==0) return; + Double_t det = fSums[0] * fSums[4] - fSums[1] *fSums[1]; + if(det==0) return kFALSE; // for(Int_t isum = 0; isum < 5; isum++) // printf("fSums[%d] = %f\n", isum, fSums[isum]); // printf("denominator = %f\n", denominator); - fParams[0] = (fSums[2] * fSums[4] - fSums[1] * fSums[3])/ denominator; - fParams[1] = (fSums[0] * fSums[3] - fSums[1] * fSums[2]) / denominator; + fParams[0] = (fSums[2] * fSums[4] - fSums[1] * fSums[3])/det; + fParams[1] = (fSums[0] * fSums[3] - fSums[1] * fSums[2])/det; // printf("fParams[0] = %f, fParams[1] = %f\n", fParams[0], fParams[1]); // Covariance matrix - fCovarianceMatrix[0] = fSums[4] - fSums[1] * fSums[1] / fSums[0]; - fCovarianceMatrix[1] = fSums[5] - fSums[2] * fSums[2] / fSums[0]; - fCovarianceMatrix[2] = fSums[3] - fSums[1] * fSums[2] / fSums[0]; + Double_t den = fSums[0]*fSums[4] - fSums[1]*fSums[1]; + fCovarianceMatrix[0] = fSums[4] / den; + fCovarianceMatrix[1] = fSums[0] / den; + fCovarianceMatrix[2] = -fSums[1] / den; +/* fCovarianceMatrix[0] = fSums[4] / fSums[0] - fSums[1] * fSums[1] / (fSums[0] * fSums[0]); + fCovarianceMatrix[1] = fSums[5] / fSums[0] - fSums[2] * fSums[2] / (fSums[0] * fSums[0]); + fCovarianceMatrix[2] = fSums[3] / fSums[0] - fSums[1] * fSums[2] / (fSums[0] * fSums[0]);*/ + + + + return kTRUE; } //_____________________________________________________________________________ -Double_t AliTRDtrackerV1::AliTRDLeastSquare::GetFunctionValue(Double_t *xpos) const { +Double_t AliTRDtrackerV1::AliTRDLeastSquare::GetFunctionValue(const Double_t *const xpos) const { // // Returns the Function value of the fitted function at a given x-position // @@ -3479,3 +3851,335 @@ void AliTRDtrackerV1::AliTRDLeastSquare::GetCovarianceMatrix(Double_t *storage) memcpy(storage, fCovarianceMatrix, sizeof(Double_t) * 3); } +//_____________________________________________________________________________ +void AliTRDtrackerV1::AliTRDLeastSquare::Reset(){ + // + // Reset the fitter + // + memset(fParams, 0, sizeof(Double_t) * 2); + memset(fCovarianceMatrix, 0, sizeof(Double_t) * 3); + memset(fSums, 0, sizeof(Double_t) * 6); +} + +/////////////////////////////////////////////////////// +// // +// Resources of class AliTRDtrackFitterRieman // +// // +/////////////////////////////////////////////////////// + +//_____________________________________________________________________________ +AliTRDtrackerV1::AliTRDtrackFitterRieman::AliTRDtrackFitterRieman(): + fTrackFitter(NULL), + fZfitter(NULL), + fCovarPolY(NULL), + fCovarPolZ(NULL), + fXref(0.), + fSysClusterError(0.) +{ + // + // Default constructor + // + fZfitter = new AliTRDLeastSquare; + fCovarPolY = new TMatrixD(3,3); + fCovarPolZ = new TMatrixD(2,2); + memset(fTracklets, 0, sizeof(AliTRDseedV1 *) * 6); + memset(fParameters, 0, sizeof(Double_t) * 5); + memset(fSumPolY, 0, sizeof(Double_t) * 5); + memset(fSumPolZ, 0, sizeof(Double_t) * 2); +} + +//_____________________________________________________________________________ +AliTRDtrackerV1::AliTRDtrackFitterRieman::~AliTRDtrackFitterRieman(){ + // + // Destructor + // + if(fZfitter) delete fZfitter; + if(fCovarPolY) delete fCovarPolY; + if(fCovarPolZ) delete fCovarPolZ; +} + +//_____________________________________________________________________________ +void AliTRDtrackerV1::AliTRDtrackFitterRieman::Reset(){ + // + // Reset the Fitter + // + if(fTrackFitter){ + fTrackFitter->StoreData(kTRUE); + fTrackFitter->ClearPoints(); + } + if(fZfitter){ + fZfitter->Reset(); + } + fXref = 0.; + memset(fTracklets, 0, sizeof(AliTRDseedV1 *) * AliTRDgeometry::kNlayer); + memset(fParameters, 0, sizeof(Double_t) * 5); + memset(fSumPolY, 0, sizeof(Double_t) * 5); + memset(fSumPolZ, 0, sizeof(Double_t) * 2); + for(Int_t irow = 0; irow < fCovarPolY->GetNrows(); irow++) + for(Int_t icol = 0; icol < fCovarPolY->GetNcols(); icol++){ + (*fCovarPolY)(irow, icol) = 0.; + if(irow < 2 && icol < 2) + (*fCovarPolZ)(irow, icol) = 0.; + } +} + +//_____________________________________________________________________________ +void AliTRDtrackerV1::AliTRDtrackFitterRieman::SetTracklet(Int_t itr, AliTRDseedV1 *tracklet){ + // + // Add tracklet into the fitter + // + if(itr >= AliTRDgeometry::kNlayer) return; + fTracklets[itr] = tracklet; +} + +//_____________________________________________________________________________ +Double_t AliTRDtrackerV1::AliTRDtrackFitterRieman::Eval(){ + // + // Perform the fit + // 1. Apply linear transformation and store points in the fitter + // 2. Evaluate the fit + // 3. Check if the result of the fit in z-direction is reasonable + // if not + // 3a. Fix the parameters 3 and 4 with the results of a simple least + // square fit + // 3b. Redo the fit with the fixed parameters + // 4. Store fit results (parameters and errors) + // + if(!fTrackFitter){ + return 1e10; + } + fXref = CalculateReferenceX(); + for(Int_t il = 0; il < AliTRDgeometry::kNlayer; il++) UpdateFitters(fTracklets[il]); + if(!fTrackFitter->GetNpoints()) return 1e10; + // perform the fit + fTrackFitter->Eval(); + fZfitter->Eval(); + fParameters[3] = fTrackFitter->GetParameter(3); + fParameters[4] = fTrackFitter->GetParameter(4); + if(!CheckAcceptable(fParameters[3], fParameters[4])) { + fTrackFitter->FixParameter(3, fZfitter->GetFunctionValue(&fXref)); + fTrackFitter->FixParameter(4, fZfitter->GetFunctionParameter(1)); + fTrackFitter->Eval(); + fTrackFitter->ReleaseParameter(3); + fTrackFitter->ReleaseParameter(4); + fParameters[3] = fTrackFitter->GetParameter(3); + fParameters[4] = fTrackFitter->GetParameter(4); + } + // Update the Fit Parameters and the errors + fParameters[0] = fTrackFitter->GetParameter(0); + fParameters[1] = fTrackFitter->GetParameter(1); + fParameters[2] = fTrackFitter->GetParameter(2); + + // Prepare Covariance estimation + (*fCovarPolY)(0,0) = fSumPolY[0]; (*fCovarPolY)(1,1) = fSumPolY[2]; (*fCovarPolY)(2,2) = fSumPolY[4]; + (*fCovarPolY)(1,0) = (*fCovarPolY)(0,1) = fSumPolY[1]; + (*fCovarPolY)(2,0) = (*fCovarPolY)(0,2) = fSumPolY[2]; + (*fCovarPolY)(2,1) = (*fCovarPolY)(1,2) = fSumPolY[3]; + fCovarPolY->Invert(); + (*fCovarPolZ)(0,0) = fSumPolZ[0]; (*fCovarPolZ)(1,1) = fSumPolZ[2]; + (*fCovarPolZ)(1,0) = (*fCovarPolZ)(0,1) = fSumPolZ[1]; + fCovarPolZ->Invert(); + return fTrackFitter->GetChisquare() / fTrackFitter->GetNpoints(); +} + +//_____________________________________________________________________________ +void AliTRDtrackerV1::AliTRDtrackFitterRieman::UpdateFitters(AliTRDseedV1 * const tracklet){ + // + // Does the transformations and updates the fitters + // The following transformation is applied + // + AliTRDcluster *cl = NULL; + Double_t x, y, z, dx, t, w, we, yerr, zerr; + Double_t uvt[4]; + if(!tracklet || !tracklet->IsOK()) return; + Double_t tilt = tracklet->GetTilt(); + for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ + if(!(cl = tracklet->GetClusters(itb))) continue; + if(!cl->IsInChamber()) continue; + if (!tracklet->IsUsable(itb)) continue; + x = cl->GetX(); + y = cl->GetY(); + z = cl->GetZ(); + dx = x - fXref; + // Transformation + t = 1./(x*x + y*y); + uvt[0] = 2. * x * t; + uvt[1] = t; + uvt[2] = 2. * tilt * t; + uvt[3] = 2. * tilt * dx * t; + w = 2. * (y + tilt*z) * t; + // error definition changes for the different calls + we = 2. * t; + we *= TMath::Sqrt(cl->GetSigmaY2()+tilt*tilt*cl->GetSigmaZ2()); + // Update sums for error calculation + yerr = 1./(TMath::Sqrt(cl->GetSigmaY2()) + fSysClusterError); + yerr *= yerr; + zerr = 1./cl->GetSigmaZ2(); + for(Int_t ipol = 0; ipol < 5; ipol++){ + fSumPolY[ipol] += yerr; + yerr *= x; + if(ipol < 3){ + fSumPolZ[ipol] += zerr; + zerr *= x; + } + } + fTrackFitter->AddPoint(uvt, w, we); + fZfitter->AddPoint(&x, z, static_cast(TMath::Sqrt(cl->GetSigmaZ2()))); + } +} + +//_____________________________________________________________________________ +Bool_t AliTRDtrackerV1::AliTRDtrackFitterRieman::CheckAcceptable(Double_t offset, Double_t slope){ + // + // Check whether z-results are acceptable + // Definition: Distance between tracklet fit and track fit has to be + // less then half a padlength + // Point of comparision is at the anode wire + // + Bool_t acceptablez = kTRUE; + Double_t zref = 0.0; + for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { + if(!fTracklets[iLayer]->IsOK()) continue; + zref = offset + slope * (fTracklets[iLayer]->GetX0() - fXref); + if (TMath::Abs(fTracklets[iLayer]->GetZfit(0) - zref) > fTracklets[iLayer]->GetPadLength() * 0.5 + 1.0) + acceptablez = kFALSE; + } + return acceptablez; +} + +//_____________________________________________________________________________ +Double_t AliTRDtrackerV1::AliTRDtrackFitterRieman::GetYat(Double_t x) const { + // + // Calculate y position out of the track parameters + // y: R^2 = (x - x0)^2 + (y - y0)^2 + // => y = y0 +/- Sqrt(R^2 - (x - x0)^2) + // R = Sqrt() = 1/Curvature + // => y = y0 +/- Sqrt(1/Curvature^2 - (x - x0)^2) + // + Double_t y = 0; + Double_t disc = (x * fParameters[0] + fParameters[1]); + disc = 1 - fParameters[0]*fParameters[2] + fParameters[1]*fParameters[1] - disc*disc; + if (disc >= 0) { + disc = TMath::Sqrt(disc); + y = (1.0 - disc) / fParameters[0]; + } + return y; +} + +//_____________________________________________________________________________ +Double_t AliTRDtrackerV1::AliTRDtrackFitterRieman::GetZat(Double_t x) const { + // + // Return z position for a given x position + // Simple linear function + // + return fParameters[3] + fParameters[4] * (x - fXref); +} + +//_____________________________________________________________________________ +Double_t AliTRDtrackerV1::AliTRDtrackFitterRieman::GetDyDxAt(Double_t x) const { + // + // Calculate dydx at a given radial position out of the track parameters + // dy: R^2 = (x - x0)^2 + (y - y0)^2 + // => y = +/- Sqrt(R^2 - (x - x0)^2) + y0 + // => dy/dx = (x - x0)/Sqrt(R^2 - (x - x0)^2) + // Curvature: cr = 1/R = a/Sqrt(1 + b^2 - c*a) + // => dy/dx = (x - x0)/(1/(cr^2) - (x - x0)^2) + // + Double_t x0 = -fParameters[1] / fParameters[0]; + Double_t curvature = GetCurvature(); + Double_t dy = 0; + if (-fParameters[2] * fParameters[0] + fParameters[1] * fParameters[1] + 1 > 0) { + if (1.0/(curvature * curvature) - (x - x0) * (x - x0) > 0.0) { + Double_t yderiv = (x - x0) / TMath::Sqrt(1.0/(curvature * curvature) - (x - x0) * (x - x0)); + if (fParameters[0] < 0) yderiv *= -1.0; + dy = yderiv; + } + } + return dy; +} + +//_____________________________________________________________________________ +Double_t AliTRDtrackerV1::AliTRDtrackFitterRieman::GetCurvature() const { + // + // Calculate track curvature + // + // + Double_t curvature = 1.0 + fParameters[1]*fParameters[1] - fParameters[2]*fParameters[0]; + if (curvature > 0.0) + curvature = fParameters[0] / TMath::Sqrt(curvature); + return curvature; +} + +//_____________________________________________________________________________ +void AliTRDtrackerV1::AliTRDtrackFitterRieman::GetCovAt(Double_t x, Double_t *cov) const { + // + // Error Definition according to gauss error propagation + // + TMatrixD transform(3,3); + transform(0,0) = transform(1,1) = transform(2,2) = 1; + transform(0,1) = transform(1,2) = x; + transform(0,2) = x*x; + TMatrixD covariance(transform, TMatrixD::kMult, *fCovarPolY); + covariance *= transform.T(); + cov[0] = covariance(0,0); + TMatrixD transformZ(2,2); + transformZ(0,0) = transformZ(1,1) = 1; + transformZ(0,1) = x; + TMatrixD covarZ(transformZ, TMatrixD::kMult, *fCovarPolZ); + covarZ *= transformZ.T(); + cov[1] = covarZ(0,0); + cov[2] = 0; +} + +//____________________________________________________________________ +Double_t AliTRDtrackerV1::AliTRDtrackFitterRieman::CalculateReferenceX(){ + // + // Calculates the reference x-position for the tilted Rieman fit defined as middle + // of the stack (middle between layers 2 and 3). For the calculation all the tracklets + // are taken into account + // + // Parameters: - Array of tracklets(AliTRDseedV1) + // + // Output: - The reference x-position(Float_t) + // + Int_t nDistances = 0; + Float_t meanDistance = 0.; + Int_t startIndex = 5; + for(Int_t il =5; il > 0; il--){ + if(fTracklets[il]->IsOK() && fTracklets[il -1]->IsOK()){ + Float_t xdiff = fTracklets[il]->GetX0() - fTracklets[il -1]->GetX0(); + meanDistance += xdiff; + nDistances++; + } + if(fTracklets[il]->IsOK()) startIndex = il; + } + if(fTracklets[0]->IsOK()) startIndex = 0; + if(!nDistances){ + // We should normally never get here + Float_t xpos[2]; memset(xpos, 0, sizeof(Float_t) * 2); + Int_t iok = 0, idiff = 0; + // This attempt is worse and should be avoided: + // check for two chambers which are OK and repeat this without taking the mean value + // Strategy avoids a division by 0; + for(Int_t il = 5; il >= 0; il--){ + if(fTracklets[il]->IsOK()){ + xpos[iok] = fTracklets[il]->GetX0(); + iok++; + startIndex = il; + } + if(iok) idiff++; // to get the right difference; + if(iok > 1) break; + } + if(iok > 1){ + meanDistance = (xpos[0] - xpos[1])/idiff; + } + else{ + // we have do not even have 2 layers which are OK? The we do not need to fit at all + return 331.; + } + } + else{ + meanDistance /= nDistances; + } + return fTracklets[startIndex]->GetX0() + (2.5 - startIndex) * meanDistance - 0.5 * (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick()); +}