X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=TRD%2FAliTRDtrackerV1.cxx;h=45b812697aa4187e50da80487e79cc9bee65f4fb;hb=803dc399b238096dcf58224967bf3ba25a3efcd4;hp=d7f854f02c7891e002e848c0ef32f1fe69713f68;hpb=60e55aee9905a1a5e66dce1cd084737911e78b04;p=u%2Fmrichter%2FAliRoot.git diff --git a/TRD/AliTRDtrackerV1.cxx b/TRD/AliTRDtrackerV1.cxx index d7f854f02c7..45b812697aa 100644 --- a/TRD/AliTRDtrackerV1.cxx +++ b/TRD/AliTRDtrackerV1.cxx @@ -25,18 +25,17 @@ // // /////////////////////////////////////////////////////////////////////////////// -// #include -// #include -// #include - #include #include #include #include #include #include +#include +#include #include "AliLog.h" +#include "AliMathBase.h" #include "AliESDEvent.h" #include "AliGeomManager.h" #include "AliRieman.h" @@ -50,6 +49,7 @@ #include "AliTRDrecoParam.h" #include "AliTRDcluster.h" +#include "AliTRDdigitsParam.h" #include "AliTRDseedV1.h" #include "AliTRDtrackV1.h" #include "AliTRDtrackerV1.h" @@ -57,52 +57,74 @@ #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; // -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 +AliTRDtrackerV1::ETRDtrackerV1BetheBloch AliTRDtrackerV1::fgBB = AliTRDtrackerV1::kGeant; 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}; +// Number of Time Bins/chamber should be also stored independently by the traker +// (also in AliTRDReconstructor) in oder to be able to run HLT. Fix TODO 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(new AliTRDgeometry()) - ,fClusters(0x0) - ,fTracklets(0x0) - ,fTracks(0x0) + ,fkReconstructor(NULL) + ,fkRecoParam(NULL) + ,fGeom(NULL) + ,fClusters(NULL) + ,fTracklets(NULL) + ,fTracks(NULL) + ,fTracksESD(NULL) ,fSieveSeeding(0) + ,fEventInFile(-1) { // // Default constructor. // - AliTRDcalibDB *trd = 0x0; - if (!(trd = AliTRDcalibDB::Instance())) { - AliFatal("Could not get calibration object"); - } + + SetReconstructor(rec); // initialize reconstructor - if(!fgNTimeBins) fgNTimeBins = trd->GetNumberOfTimeBins(); + // initialize geometry + if(!AliGeomManager::GetGeometry()){ + AliFatal("Could not get geometry."); + } + fGeom = new AliTRDgeometry(); + fGeom->CreateClusterMatrixArray(); + TGeoHMatrix *matrix = NULL; + Double_t loc[] = {0., 0., 0.}; + Double_t glb[] = {0., 0., 0.}; + for(Int_t ily=kNPlanes; ily--;){ + Int_t ism = 0; + while(!(matrix = fGeom->GetClusterMatrix(AliTRDgeometry::GetDetector(ily, 2, ism)))) ism++; + if(!matrix){ + AliError(Form("Could not get transformation matrix for layer %d. Use default.", ily)); + fR[ily] = fgkX0[ily]; + continue; + } + matrix->LocalToMaster(loc, glb); + fR[ily] = glb[0]+ AliTRDgeometry::AnodePos()-.5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick(); + } + // initialize cluster containers for (Int_t isector = 0; isector < AliTRDgeometry::kNsector; isector++) new(&fTrSec[isector]) AliTRDtrackingSector(fGeom, isector); - for(Int_t isl =0; islSetOwner(); } //____________________________________________________________________ @@ -112,10 +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) { @@ -142,7 +165,7 @@ Int_t AliTRDtrackerV1::Clusters2Tracks(AliESDEvent *esd) // See AliTRDtrackerV1::Clusters2TracksSM() for details. // - if(!fReconstructor->GetRecoParam() ){ + if(!fkRecoParam){ AliError("Reconstruction configuration not initialized. Call first AliTRDReconstructor::SetRecoParam()."); return 0; } @@ -154,7 +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; } @@ -170,40 +193,32 @@ Bool_t AliTRDtrackerV1::GetTrackPoint(Int_t index, AliTrackPoint &p) const if (!tracklet) return kFALSE; // get detector for this tracklet - Int_t idet = tracklet->GetDetector(); - + Int_t det = tracklet->GetDetector(); + Int_t sec = fGeom->GetSector(det); + Double_t alpha = (sec+.5)*AliTRDgeometry::GetAlpha(), + sinA = TMath::Sin(alpha), + cosA = TMath::Cos(alpha); Double_t local[3]; - local[0] = tracklet->GetX0(); - local[1] = tracklet->GetYfit(0); - local[2] = tracklet->GetZfit(0); + local[0] = tracklet->GetX(); + local[1] = tracklet->GetY(); + local[2] = tracklet->GetZ(); Double_t global[3]; - fGeom->RotateBack(idet, local, global); - p.SetXYZ(global[0],global[1],global[2]); - + fGeom->RotateBack(det, local, global); + + Double_t cov2D[3]; Float_t cov[6]; + tracklet->GetCovAt(local[0], cov2D); + cov[0] = cov2D[0]*sinA*sinA; + cov[1] =-cov2D[0]*sinA*cosA; + cov[2] =-cov2D[1]*sinA; + cov[3] = cov2D[0]*cosA*cosA; + cov[4] = cov2D[1]*cosA; + cov[5] = cov2D[2]; + // store the global position of the tracklet and its covariance matrix in the track point + p.SetXYZ(global[0],global[1],global[2], cov); // setting volume id - AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1; - switch (fGeom->GetLayer(idet)) { - case 0: - iLayer = AliGeomManager::kTRD1; - break; - case 1: - iLayer = AliGeomManager::kTRD2; - break; - case 2: - iLayer = AliGeomManager::kTRD3; - break; - case 3: - iLayer = AliGeomManager::kTRD4; - break; - case 4: - iLayer = AliGeomManager::kTRD5; - break; - case 5: - iLayer = AliGeomManager::kTRD6; - break; - }; - Int_t modId = fGeom->GetSector(idet) * fGeom->Nstack() + fGeom->GetStack(idet); + AliGeomManager::ELayerID iLayer = AliGeomManager::ELayerID(AliGeomManager::kTRD1+fGeom->GetLayer(det)); + Int_t modId = fGeom->GetSector(det) * AliTRDgeometry::kNstack + fGeom->GetStack(det); UShort_t volid = AliGeomManager::LayerToVolUID(iLayer, modId); p.SetVolumeID(volid); @@ -227,116 +242,152 @@ TLinearFitter* AliTRDtrackerV1::GetTiltedRiemanFitterConstraint() //____________________________________________________________________ AliRieman* AliTRDtrackerV1::GetRiemanFitter() { - if(!fgRieman) fgRieman = new AliRieman(AliTRDtrackingChamber::kNTimeBins * AliTRDgeometry::kNlayer); + if(!fgRieman) fgRieman = new AliRieman(AliTRDseedV1::kNtb * AliTRDgeometry::kNlayer); return fgRieman; } //_____________________________________________________________________________ Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) { - // - // Gets seeds from ESD event. The seeds are AliTPCtrack's found and - // backpropagated by the TPC tracker. Each seed is first propagated - // to the TRD, and then its prolongation is searched in the TRD. - // If sufficiently long continuation of the track is found in the TRD - // the track is updated, otherwise it's stored as originaly defined - // by the TPC tracker. - // +// 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. +// - // Calibration monitor - AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); - if (!calibra) AliInfo("Could not get Calibra instance\n"); - - Int_t found = 0; // number of tracks found + 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) fgNTimeBins = fkReconstructor->GetNTimeBins(); + + // Define scalers + Int_t nFound = 0, // number of tracks found + nBacked = 0, // number of tracks backed up for refit + nSeeds = 0, // total number of ESD seeds + nTRDseeds= 0, // number of seeds in the TRD acceptance + nTPCseeds= 0; // number of TPC seeds Float_t foundMin = 20.0; - Float_t *quality = 0x0; - Int_t *index = 0x0; - Int_t nSeed = event->GetNumberOfTracks(); - if(nSeed){ - quality = new Float_t[nSeed]; - index = new Int_t[nSeed]; - for (Int_t iSeed = 0; iSeed < nSeed; iSeed++) { + Float_t *quality = NULL; + Int_t *index = NULL; + fEventInFile = event->GetEventNumberInFile(); + nSeeds = event->GetNumberOfTracks(); + // Sort tracks according to quality + // (covariance in the yz plane) + if(nSeeds){ + quality = new Float_t[nSeeds]; + index = new Int_t[4*nSeeds]; + for (Int_t iSeed = nSeeds; iSeed--;) { AliESDtrack *seed = event->GetTrack(iSeed); Double_t covariance[15]; seed->GetExternalCovariance(covariance); quality[iSeed] = covariance[0] + covariance[2]; } - // Sort tracks according to covariance of local Y and Z - TMath::Sort(nSeed, quality, index,kFALSE); + TMath::Sort(nSeeds, quality, index,kFALSE); } - // Backpropagate all seeds + // Propagate all seeds Int_t expectedClr; AliTRDtrackV1 track; - for (Int_t iSeed = 0; iSeed < nSeed; iSeed++) { + for (Int_t iSeed = 0; iSeed < nSeeds; iSeed++) { // Get the seeds in sorted sequence AliESDtrack *seed = event->GetTrack(index[iSeed]); + Float_t p4 = seed->GetC(seed->GetBz()); // Check the seed status ULong_t status = seed->GetStatus(); if ((status & AliESDtrack::kTPCout) == 0) continue; if ((status & AliESDtrack::kTRDout) != 0) continue; - - // Do the back prolongation - new(&track) AliTRDtrackV1(*seed); - track.SetReconstructor(fReconstructor); - - //Int_t lbl = seed->GetLabel(); - //track.SetSeedLabel(lbl); - // Make backup and mark entrance in the TRD - seed->UpdateTrackParams(&track, AliESDtrack::kTRDin); + // Propagate to the entrance in the TRD mother volume + track.~AliTRDtrackV1(); + new(&track) AliTRDtrackV1(*seed); + if(AliTRDgeometry::GetXtrdBeg() > (AliTRDReconstructor::GetMaxStep() + track.GetX()) && !PropagateToX(track, AliTRDgeometry::GetXtrdBeg(), AliTRDReconstructor::GetMaxStep())){ + seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); + continue; + } + if(!AdjustSector(&track)){ + seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); + continue; + } + if(TMath::Abs(track.GetSnp()) > AliTRDReconstructor::GetMaxSnp()) { + seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); + continue; + } + nTPCseeds++; + AliDebug(2, Form("TRD propagate TPC seed[%d] = %d.", iSeed, index[iSeed])); + // store track status at TRD entrance seed->UpdateTrackParams(&track, AliESDtrack::kTRDbackup); - Float_t p4 = track.GetC(track.GetBz()); - expectedClr = FollowBackProlongation(track); - if (expectedClr<0) continue; // Back prolongation failed + // prepare track and do propagation in the TRD + track.SetReconstructor(fkReconstructor); + track.SetKink(Bool_t(seed->GetKinkIndex(0))); + track.SetPrimary(status & AliESDtrack::kTPCin); + expectedClr = FollowBackProlongation(track); + // check if track entered the TRD fiducial volume + if(track.GetTrackIn()){ + seed->UpdateTrackParams(&track, AliESDtrack::kTRDin); + nTRDseeds++; + } + // check if track was stopped in the TRD + if (expectedClr<0){ + seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); + continue; + } if(expectedClr){ - found++; + nFound++; // computes PID for track track.CookPID(); // update calibration references using this track if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(&track); // save calibration object - if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0 /*&& quality TODO*/){ + if (fkRecoParam->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)) { - // + // Make backup for back propagation - // Int_t foundClr = track.GetNumberOfClusters(); if (foundClr >= foundMin) { - //AliInfo(Form("Making backup track ncls [%d]...", foundClr)); - //track.CookdEdx(); - //track.CookdEdxTimBin(seed->GetID()); - track.CookLabel(1. - fgkLabelFraction); - if(track.GetBackupTrack()) UseClusters(track.GetBackupTrack()); + track.CookLabel(1. - AliTRDReconstructor::GetLabelFraction()); + //if(track.GetBackupTrack()) UseClusters(track.GetBackupTrack()); // Sign only gold tracks if (track.GetChi2() / track.GetNumberOfClusters() < 4) { - if ((seed->GetKinkIndex(0) == 0) && (track.Pt() < 1.5)){ - //UseClusters(&track); - } + //if ((seed->GetKinkIndex(0) == 0) && (track.Pt() < 1.5)) UseClusters(&track); } Bool_t isGold = kFALSE; // Full gold track if (track.GetChi2() / track.GetNumberOfClusters() < 5) { if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); - + nBacked++; isGold = kTRUE; } @@ -344,76 +395,67 @@ Int_t AliTRDtrackerV1::PropagateBack(AliESDEvent *event) if ((!isGold) && (track.GetNCross() == 0) && (track.GetChi2() / track.GetNumberOfClusters() < 7)) { //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup); if (track.GetBackupTrack()) seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); - + nBacked++; isGold = kTRUE; } if ((!isGold) && (track.GetBackupTrack())) { if ((track.GetBackupTrack()->GetNumberOfClusters() > foundMin) && ((track.GetBackupTrack()->GetChi2()/(track.GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) { seed->UpdateTrackParams(track.GetBackupTrack(),AliESDtrack::kTRDbackup); + nBacked++; isGold = kTRUE; } } - - //if ((track->StatusForTOF() > 0) && (track->GetNCross() == 0) && (Float_t(track->GetNumberOfClusters()) / Float_t(track->GetNExpected()) > 0.4)) { - //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup); - //} } } - // Propagation to the TOF (I.Belikov) - if (track.IsStopped() == kFALSE) { - Double_t xtof = 371.0; - Double_t xTOF0 = 370.0; - - Double_t c2 = track.GetSnp() + track.GetC(track.GetBz()) * (xtof - track.GetX()); - if (TMath::Abs(c2) >= 0.99) continue; - - if (!PropagateToX(track, xTOF0, fgkMaxStep)) continue; - - // Energy losses taken to the account - check one more time - c2 = track.GetSnp() + track.GetC(track.GetBz()) * (xtof - track.GetX()); - if (TMath::Abs(c2) >= 0.99) continue; - - //if (!PropagateToX(*track,xTOF0,fgkMaxStep)) { - // fHBackfit->Fill(7); - //delete track; - // continue; - //} - - Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha()); - Double_t y; - track.GetYAt(xtof,GetBz(),y); - if (y > ymax) { - if (!track.Rotate( AliTRDgeometry::GetAlpha())) continue; - }else if (y < -ymax) { - if (!track.Rotate(-AliTRDgeometry::GetAlpha())) continue; + // Propagation to the TOF + if(!(seed->GetStatus()&AliESDtrack::kTRDStop)) { + Int_t sm = track.GetSector(); + // default value in case we have problems with the geometry. + Double_t xtof = 371.; + //Calculate radial position of the beginning of the TOF + //mother volume. In order to avoid mixing of the TRD + //and TOF modules some hard values are needed. This are: + //1. The path to the TOF module. + //2. The width of the TOF (29.05 cm) + //(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 = NULL; + Double_t loc[]={0., 0., -.5*29.05}, glob[3]; + + if((m=gGeoManager->GetCurrentMatrix())){ + m->LocalToMaster(loc, glob); + xtof = TMath::Sqrt(glob[0]*glob[0]+glob[1]*glob[1]); + } } - - if (track.PropagateTo(xtof)) { - seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); - track.UpdateESDtrack(seed); + if(xtof > (AliTRDReconstructor::GetMaxStep() + track.GetX()) && !PropagateToX(track, xtof, AliTRDReconstructor::GetMaxStep())){ + seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); + continue; } - } else { - if ((track.GetNumberOfClusters() > 15) && (track.GetNumberOfClusters() > 0.5*expectedClr)) { - seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); - - track.UpdateESDtrack(seed); + if(!AdjustSector(&track)){ + seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); + continue; + } + if(TMath::Abs(track.GetSnp()) > AliTRDReconstructor::GetMaxSnp()){ + seed->UpdateTrackParams(&track, AliESDtrack::kTRDStop); + continue; } + //seed->UpdateTrackParams(&track, AliESDtrack::kTRDout); + // TODO obsolete - delete + seed->SetTRDQuality(track.StatusForTOF()); } - - seed->SetTRDQuality(track.StatusForTOF()); seed->SetTRDBudget(track.GetBudget(0)); } if(index) delete [] index; if(quality) delete [] quality; - - AliInfo(Form("Number of seeds: %d", nSeed)); - AliInfo(Form("Number of back propagated TRD tracks: %d", found)); - + AliInfo(Form("Number of seeds: TPCout[%d] TRDin[%d]", nTPCseeds, nTRDseeds)); + AliInfo(Form("Number of tracks: TRDout[%d] TRDbackup[%d]", nFound, nBacked)); + // run stand alone tracking - if (fReconstructor->IsSeeding()) Clusters2Tracks(event); + if (fkReconstructor->IsSeeding()) Clusters2Tracks(event); return 0; } @@ -434,22 +476,25 @@ 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; } - ULong_t status = seed->GetStatus(); - // reject tracks which failed propagation in the TRD - if((status & AliESDtrack::kTRDout) == 0) continue; - - // reject tracks which are produced by the TRD stand alone track finder. - if((status & AliESDtrack::kTRDin) == 0) continue; + // reject tracks which failed propagation in the TRD or + // are produced by the TRD stand alone tracker + if(!(status & AliESDtrack::kTRDout)) continue; + if(!(status & AliESDtrack::kTRDin)) continue; nseed++; track.ResetCovariance(50.0); @@ -458,22 +503,32 @@ Int_t AliTRDtrackerV1::RefitInward(AliESDEvent *event) Bool_t kUPDATE = kFALSE; Double_t xTPC = 250.0; if(FollowProlongation(track)){ + // Update the friend track + if (fkRecoParam->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->SetTrackOut(&track); + } + } + // Prolongate to TPC - if (PropagateToX(track, xTPC, fgkMaxStep)) { // -with update - seed->UpdateTrackParams(&track, AliESDtrack::kTRDrefit); - found++; - kUPDATE = kTRUE; + if (PropagateToX(track, xTPC, AliTRDReconstructor::GetMaxStep())) { // -with update + seed->UpdateTrackParams(&track, AliESDtrack::kTRDrefit); + found++; + kUPDATE = kTRUE; } - } + } // Prolongate to TPC without update if(!kUPDATE) { AliTRDtrackV1 tt(*seed); - if (PropagateToX(tt, xTPC, fgkMaxStep)) seed->UpdateTrackParams(&tt, AliESDtrack::kTRDrefit); + if (PropagateToX(tt, xTPC, AliTRDReconstructor::GetMaxStep())) 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; } @@ -506,21 +561,23 @@ Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t) // Int_t nClustersExpected = 0; - Int_t lastplane = 5; //GetLastPlane(&t); - for (Int_t iplane = lastplane; iplane >= 0; iplane--) { - Int_t index = 0; + for (Int_t iplane = kNPlanes; iplane--;) { + 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"); - - Double_t x = tracklet->GetXref();//GetX0(); + 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; + if(x > t.GetX()+AliTRDReconstructor::GetMaxStep()) continue; // append tracklet to track t.SetTracklet(tracklet, index); - if (x < (t.GetX()-fgkMaxStep) && !PropagateToX(t, x+fgkMaxStep, fgkMaxStep)) break; + if (x < (t.GetX()-AliTRDReconstructor::GetMaxStep()) && !PropagateToX(t, x+AliTRDReconstructor::GetMaxStep(), AliTRDReconstructor::GetMaxStep())) break; if (!AdjustSector(&t)) break; // Start global position @@ -551,14 +608,19 @@ Int_t AliTRDtrackerV1::FollowProlongation(AliTRDtrackV1 &t) t.PropagateTo(x, xx0, xrho); if (!AdjustSector(&t)) break; } - - 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 && ((AliExternalTrackParam&)t).Update(p, cov)){ + // Register info to track + t.SetNumberOfClusters(); + t.UpdateChi2(chi2); nClustersExpected += tracklet->GetN(); } } - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ + if(fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1){ Int_t index; for(int iplane=0; iplaneGetDebugStream(AliTRDReconstructor::kTracker); - cstreamer << "FollowProlongation" - << "EventNumber=" << eventNumber - << "ncl=" << nClustersExpected - //<< "track.=" << &t - << "\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; } @@ -582,189 +647,387 @@ 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 - // - - Int_t nClustersExpected = 0; - Double_t clength = .5*AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick(); - AliTRDtrackingChamber *chamber = 0x0; +// 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 = NULL; - AliTRDseedV1 tracklet, *ptrTracklet = 0x0; - // in case of stand alone tracking we store all the pointers to the tracklets in a temporary array + Int_t debugLevel = fkReconstructor->IsDebugStreaming() ? fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) : 0; + TTreeSRedirector *cstreamer = fkReconstructor->IsDebugStreaming() ? fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker) : 0x0; + + Bool_t kStoreIn(kTRUE), // toggel store track params. at TRD entry + kStandAlone(kFALSE), // toggle tracker awarness of stand alone seeding + kUseTRD(fkRecoParam->IsOverPtThreshold(t.Pt()));// use TRD measurment to update Kalman + + Int_t startLayer(0); + AliTRDseedV1 tracklet, *ptrTracklet = NULL; + // Special case for stand alone tracking + // - store all tracklets found by seeding + // - start propagation from first tracklet found AliTRDseedV1 *tracklets[kNPlanes]; memset(tracklets, 0, sizeof(AliTRDseedV1 *) * kNPlanes); - for(Int_t ip = 0; ip < kNPlanes; ip++){ - tracklets[ip] = t.GetTracklet(ip); + for(Int_t ip(kNPlanes); ip--;){ + if(!(tracklets[ip] = t.GetTracklet(ip))) continue; t.UnsetTracklet(ip); + if(tracklets[ip]->IsOK()) startLayer=ip; + kStandAlone = kTRUE; + kUseTRD = kTRUE; } + AliDebug(4, Form("SA[%c] Start[%d]\n" + " [0]idx[%d] traklet[%p]\n" + " [1]idx[%d] traklet[%p]\n" + " [2]idx[%d] traklet[%p]\n" + " [3]idx[%d] traklet[%p]\n" + " [4]idx[%d] traklet[%p]\n" + " [5]idx[%d] traklet[%p]" + , kStandAlone?'y':'n', startLayer + , t.GetTrackletIndex(0), (void*)tracklets[0] + , t.GetTrackletIndex(1), (void*)tracklets[1] + , t.GetTrackletIndex(2), (void*)tracklets[2] + , t.GetTrackletIndex(3), (void*)tracklets[3] + , t.GetTrackletIndex(4), (void*)tracklets[4] + , t.GetTrackletIndex(5), (void*)tracklets[5])); // Loop through the TRD layers - for (Int_t ilayer = 0; ilayer < AliTRDgeometry::Nlayer(); ilayer++) { - // BUILD TRACKLET IF NOT ALREADY BUILT - Double_t x = 0., x0, y, z, alpha; - ptrTracklet = tracklets[ilayer]; - if(!ptrTracklet){ - ptrTracklet = new(&tracklet) AliTRDseedV1(ilayer); - ptrTracklet->SetReconstructor(fReconstructor); - alpha = t.GetAlpha(); - Int_t sector = Int_t(alpha/AliTRDgeometry::GetAlpha() + (alpha>0. ? 0 : AliTRDgeometry::kNsector)); - - if(!fTrSec[sector].GetNChambers()) continue; - - if((x = fTrSec[sector].GetX(ilayer)) < 1.) continue; - - // Propagate closer to the current layer - x0 = x - 1.5*clength; - if (x0 > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x0-fgkMaxStep, fgkMaxStep)) return -1/*nClustersExpected*/; - if (!AdjustSector(&t)) return -1/*nClustersExpected*/; - if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) return -1/*nClustersExpected*/; - - if (!t.GetProlongation(x, y, z)) return -1/*nClustersExpected*/; - Int_t stack = fGeom->GetStack(z, ilayer); - Int_t nCandidates = stack >= 0 ? 1 : 2; - z -= stack >= 0 ? 0. : 4.; - - for(int icham=0; ichamGetStack(z, ilayer)) < 0) continue; - - if(!(chamber = fTrSec[sector].GetChamber(stack, ilayer))) continue; - - if(chamber->GetNClusters() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()) continue; - - x = chamber->GetX(); - - AliTRDpadPlane *pp = fGeom->GetPadPlane(ilayer, stack); - tracklet.SetTilt(TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle())); - tracklet.SetPadLength(pp->GetLengthIPad()); - tracklet.SetDetector(chamber->GetDetector()); - tracklet.SetX0(x); - tracklet.UpDate(&t); -// if(!tracklet.Init(&t)){ -// t.SetStopped(kTRUE); -// return nClustersExpected; -// } - if(!tracklet.AttachClusters(chamber, kTRUE)) continue; - //if(!tracklet.AttachClustersIter(chamber, 1000.)) continue; - //tracklet.Init(&t); - - if(tracklet.GetN() < fgNTimeBins*fReconstructor->GetRecoParam() ->GetFindableClusters()) continue; + TGeoHMatrix *matrix = NULL; + Double_t x(0.), y(0.), z(0.); + for (Int_t ily=startLayer, 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; + } + + // find sector / stack / detector + sm = t.GetSector(); + // 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) : NULL; + + // 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] > (AliTRDReconstructor::GetMaxStep() + t.GetX()) && !PropagateToX(t, fR[ily], AliTRDReconstructor::GetMaxStep())){ + 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()) > AliTRDReconstructor::GetMaxSnp()){ + n=-1; + t.SetStatus(AliTRDtrackV1::kSnp); + AliDebug(4, "Failed Max Snp [Missing Geometry]"); + break; + } + t.SetStatus(AliTRDtrackV1::kGeometry, ily); + continue; + } + + // retrieve rotation matrix for the current chamber + Double_t loc[] = {AliTRDgeometry::AnodePos()- driftLength, 0., 0.}; + Double_t glb[] = {0., 0., 0.}; + matrix->LocalToMaster(loc, glb); + AliDebug(3, Form("Propagate to det[%3d] x_anode[%7.2f] (%f %f)", det, glb[0]+driftLength, glb[1], glb[2])); + + // Propagate to the radial distance of the current layer + x = glb[0] - AliTRDReconstructor::GetMaxStep(); + if(x > (AliTRDReconstructor::GetMaxStep() + t.GetX()) && !PropagateToX(t, x, AliTRDReconstructor::GetMaxStep())){ + 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()) > AliTRDReconstructor::GetMaxSnp()) { + n=-1; + t.SetStatus(AliTRDtrackV1::kSnp); + AliDebug(4, Form("Failed Max Snp[%f] MaxSnp[%f]", t.GetSnp(), AliTRDReconstructor::GetMaxSnp())); + break; + } + Bool_t doRecalculate = kFALSE; + if(sm != t.GetSector()){ + sm = t.GetSector(); + doRecalculate = kTRUE; + } + if(stk != fGeom->GetStack(z, ily)){ + stk = fGeom->GetStack(z, ily); + doRecalculate = kTRUE; + } + 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); + x = glb[0] - AliTRDReconstructor::GetMaxStep(); + } + + // check if track is well inside fiducial volume + if (!t.GetProlongation(x+AliTRDReconstructor::GetMaxStep(), y, z)) { + n=-1; + t.SetStatus(AliTRDtrackV1::kProlongation); + AliDebug(4, Form("Failed Prolongation to x[%7.2f] y[%7.2f] z[%7.2f]", x+AliTRDReconstructor::GetMaxStep(), y, z)); + break; + } + if(fGeom->IsOnBoundary(det, y, z, .5)){ + t.SetStatus(AliTRDtrackV1::kBoundary, ily); + AliDebug(4, "Failed Track on Boundary"); + continue; + } + + 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*fkRecoParam ->GetFindableClusters()){ + t.SetStatus(AliTRDtrackV1::kNoClusters, ily); + AliDebug(4, "Failed Not Enough Clusters in Detector"); + continue; + } + // build tracklet + tracklet.~AliTRDseedV1(); + ptrTracklet = new(&tracklet) AliTRDseedV1(det); + ptrTracklet->SetReconstructor(fkReconstructor); + ptrTracklet->SetKink(t.IsKink()); + ptrTracklet->SetPrimary(t.IsPrimary()); + ptrTracklet->SetPadPlane(fGeom->GetPadPlane(ily, stk)); + ptrTracklet->SetX0(glb[0]+driftLength); + if(!ptrTracklet->Init(&t)){ + n=-1; + t.SetStatus(AliTRDtrackV1::kTrackletInit); + AliDebug(4, "Failed Tracklet Init"); break; } - //ptrTracklet->UseClusters(); - }// else ptrTracklet->Init(&t); - if(!ptrTracklet->IsOK()){ - if(x < 1.) continue; //temporary - if(!PropagateToX(t, x-fgkMaxStep, fgkMaxStep)) return -1/*nClustersExpected*/; - if(!AdjustSector(&t)) return -1/*nClustersExpected*/; - if(TMath::Abs(t.GetSnp()) > fgkMaxSnp) return -1/*nClustersExpected*/; + // Select attachment base on track to B field sign not only track charge which is buggy + // mark kFALSE same sign tracks and kTRUE opposite sign tracks + // A.Bercuci 3.11.2011 + Float_t prod(t.GetBz()*t.Charge()); + if(!ptrTracklet->AttachClusters(chamber, kTRUE, prod<0.?kTRUE:kFALSE, fEventInFile)){ + t.SetStatus(AliTRDtrackV1::kNoAttach, ily); + if(debugLevel>3){ + AliTRDseedV1 trackletCp(*ptrTracklet); + UChar_t status(t.GetStatusTRD(ily)); + (*cstreamer) << "FollowBackProlongation4" + <<"status=" << status + <<"tracklet.=" << &trackletCp + << "\n"; + } + AliDebug(4, "Failed Attach Clusters"); + continue; + } + AliDebug(3, Form("Number of Clusters in Tracklet: %d", ptrTracklet->GetN())); + if(ptrTracklet->GetN() < fgNTimeBins*fkRecoParam->GetFindableClusters()){ + t.SetStatus(AliTRDtrackV1::kNoClustersTracklet, ily); + if(debugLevel>3){ + AliTRDseedV1 trackletCp(*ptrTracklet); + UChar_t status(t.GetStatusTRD(ily)); + (*cstreamer) << "FollowBackProlongation4" + <<"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 + + // fit tracklet + // tilt correction options + // 0 : no correction + // 2 : pseudo tilt correction + if(!ptrTracklet->FitRobust(t.Charge()>0?kTRUE:kFALSE)){ + t.SetStatus(AliTRDtrackV1::kNoFit, ily); + AliDebug(4, "Failed Tracklet Fit"); continue; + } + x = ptrTracklet->GetX(); //GetX0(); + if(x > (AliTRDReconstructor::GetMaxStep() + t.GetX()) && !PropagateToX(t, x, AliTRDReconstructor::GetMaxStep())) { + n=-1; + t.SetStatus(AliTRDtrackV1::kPropagation); + AliDebug(4, Form("Failed Propagation to Tracklet x[%7.2f]", x)); + break; } - - // Propagate closer to the current chamber if neccessary - x -= clength; - if (x > (fgkMaxStep + t.GetX()) && !PropagateToX(t, x-fgkMaxStep, fgkMaxStep)) return -1/*nClustersExpected*/; - if (!AdjustSector(&t)) return -1/*nClustersExpected*/; - if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) return -1/*nClustersExpected*/; - - // load tracklet to the tracker and the track - ptrTracklet->Fit(kFALSE); // no tilt correction - ptrTracklet = SetTracklet(ptrTracklet); - t.SetTracklet(ptrTracklet, fTracklets->GetEntriesFast()-1); - + if(!AdjustSector(&t)) { + n=-1; + t.SetStatus(AliTRDtrackV1::kAdjustSector); + AliDebug(4, "Failed Adjust Sector"); + break; + } + if(TMath::Abs(t.GetSnp()) > AliTRDReconstructor::GetMaxSnp()) { + n=-1; + t.SetStatus(AliTRDtrackV1::kSnp); + AliDebug(4, Form("Failed Max Snp[%f] MaxSnp[%f]", t.GetSnp(), AliTRDReconstructor::GetMaxSnp())); + break; + } + 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 + 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) << "FollowBackProlongation3" + << "status=" << status + << "tracklet.=" << &trackletCp + << "track.=" << &trackCp + << "\n"; + } + AliDebug(4, Form("Failed Chi2[%f]", chi2)); + continue; + } + // mark track as entering the FIDUCIAL volume of TRD + if(kStoreIn){ + t.SetTrackIn(); + kStoreIn = kFALSE; + } + if(kUseTRD){ + if(!((AliExternalTrackParam&)t).Update(p, cov)) { + n=-1; + t.SetStatus(AliTRDtrackV1::kUpdate); + if(debugLevel > 2){ + UChar_t status(t.GetStatusTRD()); + AliTRDseedV1 trackletCp(*ptrTracklet); + AliTRDtrackV1 trackCp(t); + trackCp.SetOwner(); + (*cstreamer) << "FollowBackProlongation3" + << "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; + } + } + if(!kStandAlone) ptrTracklet->UseClusters(); + // fill residuals ?! + AliTracker::FillResiduals(&t, p, cov, ptrTracklet->GetVolumeId()); - // Calculate the mean material budget along the path inside the chamber - //Calculate global entry and exit positions of the track in chamber (only track prolongation) - Double_t xyz0[3]; // entry point - t.GetXYZ(xyz0); - alpha = t.GetAlpha(); - x = ptrTracklet->GetXref(); //GetX0(); - if (!t.GetProlongation(x, y, z)) return -1/*nClustersExpected*/; - Double_t xyz1[3]; // exit point - xyz1[0] = x * TMath::Cos(alpha) - y * TMath::Sin(alpha); - xyz1[1] = +x * TMath::Sin(alpha) + y * TMath::Cos(alpha); - xyz1[2] = z; - Double_t param[7]; - if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) return -1; - // The mean propagation parameters - Double_t xrho = param[0]*param[4]; // density*length - Double_t xx0 = param[1]; // radiation length - - // Propagate and update track - if (!t.PropagateTo(x, xx0, xrho)) return -1/*nClustersExpected*/; - if (!AdjustSector(&t)) return -1/*nClustersExpected*/; - Double_t maxChi2 = t.GetPredictedChi2(ptrTracklet); - if (!t.Update(ptrTracklet, maxChi2)) return -1/*nClustersExpected*/; - ptrTracklet->UpDate(&t); - if (maxChi2<1e+10) { - nClustersExpected += ptrTracklet->GetN(); - //t.SetTracklet(&tracklet, index); - } + // register tracklet with the tracker and track + // Save inside the tracklet the track parameters BEFORE track update. + // Commented out their overwriting AFTER track update + // A.Bercuci 3.11.2011 + //ptrTracklet->Update(&t); + ptrTracklet = SetTracklet(ptrTracklet); + Int_t index(fTracklets->GetEntriesFast()-1); + t.SetTracklet(ptrTracklet, index); + // Register info to track + t.SetNumberOfClusters(); + t.UpdateChi2(chi2); + + 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.); +// if(ilayer>0 && t.GetTracklet(ilayer-1) && ptrTracklet->GetN() + t.GetTracklet(ilayer-1)->GetN() > 20) t.SetBudget(2, 0.); // Make backup of the track until is gold - // TO DO update quality check of the track. - // consider comparison with fTimeBinsRange - Float_t ratio0 = ptrTracklet->GetN() / Float_t(fgNTimeBins); - //Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1); - //printf("tracklet.GetChi2() %f [< 18.0]\n", tracklet.GetChi2()); - //printf("ratio0 %f [> 0.8]\n", ratio0); - //printf("ratio1 %f [> 0.6]\n", ratio1); - //printf("ratio0+ratio1 %f [> 1.5]\n", ratio0+ratio1); - //printf("t.GetNCross() %d [== 0]\n", t.GetNCross()); - //printf("TMath::Abs(t.GetSnp()) %f [< 0.85]\n", TMath::Abs(t.GetSnp())); - //printf("t.GetNumberOfClusters() %d [> 20]\n", t.GetNumberOfClusters()); - - if (//(tracklet.GetChi2() < 18.0) && TO DO check with FindClusters and move it to AliTRDseed::Update - (ratio0 > 0.8) && - //(ratio1 > 0.6) && - //(ratio0+ratio1 > 1.5) && - (t.GetNCross() == 0) && - (TMath::Abs(t.GetSnp()) < 0.85) && - (t.GetNumberOfClusters() > 20)) t.MakeBackupTrack(); - - } // end layers loop + Int_t failed(0); + if(!kStandAlone && (failed = t.MakeBackupTrack())) AliDebug(2, Form("Failed backup on cut[%d]", failed)); - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); - Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); - //AliTRDtrackV1 *debugTrack = new AliTRDtrackV1(t); - //debugTrack->SetOwner(); - cstreamer << "FollowBackProlongation" - << "EventNumber=" << eventNumber - << "ncl=" << nClustersExpected - //<< "track.=" << debugTrack + } // end layers loop + //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(n && debugLevel > 1){ + //Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); + AliTRDtrackV1 track(t); + track.SetOwner(); + (*cstreamer) << "FollowBackProlongation2" + << "EventNumber=" << fEventInFile + << "track.=" << &track << "\n"; } - return nClustersExpected; + return n; } //_________________________________________________________________________ -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 @@ -787,7 +1050,7 @@ Float_t AliTRDtrackerV1::FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_ } for(Int_t il = 0; il < maxLayers; il++){ if(!tracklets[ppl[il]].IsOK()) continue; - fitter->AddPoint(tracklets[ppl[il]].GetX0(), tracklets[ppl[il]].GetYfitR(0), tracklets[ppl[il]].GetZProb(),1,10); + fitter->AddPoint(tracklets[ppl[il]].GetX0(), tracklets[ppl[il]].GetYfit(0), tracklets[ppl[il]].GetZfit(0),1,10); } fitter->Update(); // Set the reference position of the fit and calculate the chi2 values @@ -820,8 +1083,9 @@ void AliTRDtrackerV1::FitRieman(AliTRDcluster **seedcl, Double_t chi2[2]) // AliRieman *fitter = AliTRDtrackerV1::GetRiemanFitter(); fitter->Reset(); - for(Int_t i = 0; i < 4; i++) - fitter->AddPoint(seedcl[i]->GetX(), seedcl[i]->GetY(), seedcl[i]->GetZ(), 1, 10); + for(Int_t i = 0; i < 4; i++){ + fitter->AddPoint(seedcl[i]->GetX(), seedcl[i]->GetY(), seedcl[i]->GetZ(), 1., 10.); + } fitter->Update(); @@ -867,16 +1131,17 @@ 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]; Int_t nPoints = 0; for(Int_t ilr = 0; ilr < AliTRDgeometry::kNlayer; ilr++){ if(!tracklets[ilr].IsOK()) continue; - for(Int_t itb = 0; itb < fgNTimeBins; itb++){ + for(Int_t itb = 0; itb < AliTRDseedV1::kNclusters; itb++){ if(!tracklets[ilr].IsUsable(itb)) continue; - cl = tracklets[ilr].GetClusters(itb); + if(!(cl = tracklets[ilr].GetClusters(itb))) continue; + if(!cl->IsInChamber()) continue; x = cl->GetX(); y = cl->GetY(); z = cl->GetZ(); @@ -886,7 +1151,7 @@ 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. * 0.2 * t; + error = 2. * TMath::Sqrt(cl->GetSigmaY2()+tilt*tilt*cl->GetSigmaZ2()) * t; fitter->AddPoint(uvt, w, error); nPoints++; } @@ -900,9 +1165,11 @@ Float_t AliTRDtrackerV1::FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Doub Float_t chi2track = fitter->GetChisquare()/Double_t(nPoints); for(Int_t ip = 0; ip < AliTRDtrackerV1::kNPlanes; ip++) - tracklets[ip].SetCC(curvature); + tracklets[ip].SetC(curvature, 1); + + if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>3) printf("D-AliTRDtrackerV1::FitTiltedRiemanConstraint: Chi2[%f] C[%5.2e] pt[%8.3f]\n", chi2track, curvature, GetBz()*kB2C/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); @@ -910,7 +1177,7 @@ 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 @@ -959,22 +1226,25 @@ 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++){ if(!tracklets[ipl].IsOK()) continue; - for(Int_t itb = 0; itb < fgNTimeBins; itb++){ + 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(); z = cl->GetZ(); - tilt = tracklets[ipl].GetTilt(); dx = x - xref; // Transformation t = 1./(x*x + y*y); @@ -985,13 +1255,25 @@ 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 ? tracklets[ipl].GetSigmaY() : 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++; } } - fitter->Eval(); + if (fitter->Eval()) return 1.e10; zfitter.Eval(); Double_t offset = fitter->GetParameter(3); @@ -1004,7 +1286,7 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { if(!tracklets[iLayer].IsOK()) continue; zref = offset + slope * (tracklets[iLayer].GetX0() - xref); - if (TMath::Abs(tracklets[iLayer].GetZProb() - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) + if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) acceptablez = kFALSE; } if (!acceptablez) { @@ -1024,21 +1306,49 @@ Float_t AliTRDtrackerV1::FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigErro Double_t b = fitter->GetParameter(1); Double_t c = fitter->GetParameter(2); Double_t curvature = 1.0 + b*b - c*a; - if (curvature > 0.0) - curvature = a / TMath::Sqrt(curvature); + if (curvature > 0.0) curvature = a / TMath::Sqrt(curvature); 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 @@ -1050,6 +1360,9 @@ 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 @@ -1059,9 +1372,9 @@ 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); @@ -1071,11 +1384,13 @@ 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(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>3) printf("D-AliTRDtrackerV1::FitTiltedRieman: Chi2[%f] C[%5.2e] pt[%8.3f]\n", chi2track, curvature, GetBz()*kB2C/curvature); -/* 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); @@ -1093,10 +1408,15 @@ 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; @@ -1161,42 +1481,63 @@ 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; @@ -1207,15 +1548,16 @@ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 } Double_t xref = CalculateReferenceX(tracklets); + if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>3) printf("D-AliTRDtrackerV1::FitRiemanTilt:\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; // Containers for Least-square fitter for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ if(!tracklets[ipl].IsOK()) continue; - for(Int_t itb = 0; itb < fgNTimeBins; itb++){ + 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(); @@ -1230,7 +1572,7 @@ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 w = 2. * (y + tilt*z) * t; // error definition changes for the different calls we = 2. * t; - we *= sigError ? tracklets[ipl].GetSigmaY() : 0.2; + we *= sigError ? TMath::Sqrt(cl->GetSigmaY2()) : 0.2; fitter->AddPoint(uvt, w, we); zfitter.AddPoint(&x, z, static_cast(TMath::Sqrt(cl->GetSigmaZ2()))); nPoints++; @@ -1249,7 +1591,7 @@ Double_t AliTRDtrackerV1::FitRiemanTilt(const AliTRDtrackV1 *track, AliTRDseedV1 for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { if(!tracklets[iLayer].IsOK()) continue; zref = z0 + dzdx * (tracklets[iLayer].GetX0() - xref); - if (TMath::Abs(tracklets[iLayer].GetZProb() - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) + if (TMath::Abs(tracklets[iLayer].GetZfit(0) - zref) > tracklets[iLayer].GetPadLength() * 0.5 + 1.0) accept = kFALSE; } if (!accept) { @@ -1273,18 +1615,19 @@ 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); + if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>3) printf("D-AliTRDtrackerV1::FitRiemanTilt: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); @@ -1295,7 +1638,7 @@ 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); } } @@ -1304,7 +1647,7 @@ 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); } @@ -1315,7 +1658,7 @@ 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" @@ -1334,7 +1677,8 @@ 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; + AliTRDseedV1 *ptrTracklet = NULL; //Loop through the TRD planes for (Int_t jplane = 0; jplane < kNPlanes; jplane++) { @@ -1344,8 +1688,8 @@ 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; @@ -1357,8 +1701,8 @@ Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklet while(ip < np){ //don't do anything if next marker is after next update point. - if((up?-1:1) * (points[ip].GetX() - x) - fgkMaxStep < 0) break; - if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), fgkMaxStep)) return -1.; + if((up?-1:1) * (points[ip].GetX() - x) - AliTRDReconstructor::GetMaxStep() < 0) break; + if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), AliTRDReconstructor::GetMaxStep())) return -1.; Double_t xyz[3]; // should also get the covariance track->GetXYZ(xyz); @@ -1369,10 +1713,10 @@ Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklet // printf("plane[%d] tracklet[%p] x[%f]\n", iplane, ptrTracklet, x); // Propagate closer to the next update point - if(((up?-1:1) * (x - track->GetX()) + fgkMaxStep < 0) && !PropagateToX(*track, x + (up?-1:1)*fgkMaxStep, fgkMaxStep)) return -1.; + if(((up?-1:1) * (x - track->GetX()) + AliTRDReconstructor::GetMaxStep() < 0) && !PropagateToX(*track, x + (up?-1:1)*AliTRDReconstructor::GetMaxStep(), AliTRDReconstructor::GetMaxStep())) return -1.; if(!AdjustSector(track)) return -1; - if(TMath::Abs(track->GetSnp()) > fgkMaxSnp) return -1; + if(TMath::Abs(track->GetSnp()) > AliTRDReconstructor::GetMaxSnp()) return -1; //load tracklet to the tracker and the track /* Int_t index; @@ -1398,7 +1742,7 @@ 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 @@ -1409,8 +1753,10 @@ 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) ((AliExternalTrackParam*)track)->Update(p, cov); if(!up) continue; //Reset material budget if 2 consecutive gold @@ -1419,7 +1765,7 @@ Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklet // extrapolation while(ip < np){ - if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), fgkMaxStep)) return -1.; + if(((up?-1:1) * (points[ip].GetX() - track->GetX()) < 0) && !PropagateToX(*track, points[ip].GetX(), AliTRDReconstructor::GetMaxStep())) return -1.; Double_t xyz[3]; // should also get the covariance track->GetXYZ(xyz); @@ -1432,7 +1778,7 @@ Double_t AliTRDtrackerV1::FitKalman(AliTRDtrackV1 *track, AliTRDseedV1 *tracklet } //_________________________________________________________________________ -Float_t AliTRDtrackerV1::CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref) +Float_t AliTRDtrackerV1::CalculateChi2Z(const AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref) { // // Calculates the chi2-value of the track in z-Direction including tilting pad correction. @@ -1448,7 +1794,7 @@ Float_t AliTRDtrackerV1::CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset for (Int_t iLayer = 0; iLayer < AliTRDgeometry::kNlayer; iLayer++) { if(!tracklets[iLayer].IsOK()) continue; Double_t z = offset + slope * (tracklets[iLayer].GetX0() - xref); - chi2Z += TMath::Abs(tracklets[iLayer].GetMeanz() - z); + chi2Z += TMath::Abs(tracklets[iLayer].GetZfit(0) - z); nLayers++; } chi2Z /= TMath::Max((nLayers - 3.0),1.0); @@ -1464,16 +1810,15 @@ Int_t AliTRDtrackerV1::PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t m // Returns 1 if track reaches the plane, and 0 otherwise // - const Double_t kEpsilon = 0.00001; - // Current track X-position - Double_t xpos = t.GetX(); + Double_t xpos = t.GetX()/*, + mass = t.GetMass()*/; // Direction: inward or outward Double_t dir = (xpos < xToGo) ? 1.0 : -1.0; - while (((xToGo - xpos) * dir) > kEpsilon) { - + while (((xToGo - xpos) * dir) > AliTRDReconstructor::GetEpsilon()) { +// printf("to go %f\n", (xToGo - xpos) * dir); Double_t xyz0[3]; Double_t xyz1[3]; Double_t param[7]; @@ -1491,9 +1836,7 @@ 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()); @@ -1503,12 +1846,47 @@ Int_t AliTRDtrackerV1::PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t m // Calculate the mean material budget between start and // end point of this prolongation step if(AliTracker::MeanMaterialBudget(xyz0, xyz1, param)<=0.) return 0; - + // Propagate the track to the X-position after the next step if (!t.PropagateTo(x, param[1], param[0]*param[4])) return 0; +/* // Correct for mean material budget + Double_t dEdx(0.), + bg(t.GetP()/mass); + if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>=3){ + const char *pn[] = {"rho", "x/X0", "", "", "L", "", "Nb"}; + printf("D-AliTRDtrackerV1::PropagateTo(): x[%6.2f] bg[%6.2f]\n", xpos, bg); + printf(" param :: %s[%e] %s[%e] %s[%e] %s[%e] %s[%e] %s[%e] %s[%e]\n" + , pn[0], param[0] + , pn[1], param[1] + , pn[2], param[2] + , pn[3], param[3] + , pn[4], param[4] + , pn[5], param[5] + , pn[6], param[6]); + } + switch(fgBB){ + case kSolid: + dEdx = AliExternalTrackParam::BetheBlochSolid(bg); + break; + case kGas: + dEdx = AliExternalTrackParam::BetheBlochGas(bg); + break; + case kGeant: + { // mean exitation energy (GeV) + Double_t mee = ((param[3] < 13.) ? (12. * param[3] + 7.) : (9.76 * param[3] + 58.8 * TMath::Power(param[3],-0.19))) * 1.e-9; + Double_t mZA = param[5]>1.e-5?param[5]:(param[3]/param[2]); + if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>=3) printf("D-AliTRDtrackerV1::PropagateTo(): Mee[%e] [%e]\n", mee, mZA); + // protect against failed calculation of rho in MeanMaterialBudget() + dEdx = AliExternalTrackParam::BetheBlochGeant(bg, param[0]>1.e-6?param[0]:2.33, 0.2, 3., mee, mZA); + } + break; + } + if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")>=2) printf("D-AliTRDtrackerV1::PropagateTo(): dEdx(bg=%e, m=%e)= %e[GeV/cm]\n", bg, mass, dEdx); + if (!t.CorrectForMeanMaterialdEdx(param[1], dir*param[0]*param[4], mass, dEdx)) return 0; +*/ // Rotate the track if necessary - AdjustSector(&t); + if(!AdjustSector(&t)) return 0; // New track X-position xpos = t.GetX(); @@ -1519,9 +1897,8 @@ Int_t AliTRDtrackerV1::PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t m } - //_____________________________________________________________________________ -Int_t AliTRDtrackerV1::ReadClusters(TClonesArray* &array, TTree *clusterTree) const +Bool_t AliTRDtrackerV1::ReadClusters(TTree *clusterTree) { // // Reads AliTRDclusters from the file. @@ -1535,22 +1912,22 @@ Int_t AliTRDtrackerV1::ReadClusters(TClonesArray* &array, TTree *clusterTree) co TBranch *branch = clusterTree->GetBranch("TRDcluster"); if (!branch) { AliError("Can't get the branch !"); - return 1; + return kFALSE; } branch->SetAddress(&clusterArray); if(!fClusters){ - Float_t nclusters = fReconstructor->GetRecoParam()->GetNClusters(); - if(fReconstructor->IsHLT()) nclusters /= AliTRDgeometry::kNsector; - array = new TClonesArray("AliTRDcluster", Int_t(nclusters)); - array->SetOwner(kTRUE); + Float_t nclusters = fkRecoParam->GetNClusters(); + if(fkReconstructor->IsHLT()) nclusters /= AliTRDgeometry::kNsector; + fClusters = new TClonesArray("AliTRDcluster", Int_t(nclusters)); + fClusters->SetOwner(kTRUE); } // Loop through all entries in the tree Int_t nEntries = (Int_t) clusterTree->GetEntries(); Int_t nbytes = 0; Int_t ncl = 0; - AliTRDcluster *c = 0x0; + AliTRDcluster *c = NULL; for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) { // Import the tree nbytes += clusterTree->GetEvent(iEntry); @@ -1559,15 +1936,13 @@ 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)); } - } delete clusterArray; - return 0; + return kTRUE; } //_____________________________________________________________________________ @@ -1577,10 +1952,12 @@ Int_t AliTRDtrackerV1::LoadClusters(TTree *cTree) // Fills clusters into TRD tracking sectors // - if(!fReconstructor->IsWritingClusters()){ + fkRecoParam = fkReconstructor->GetRecoParam(); // load reco param for this event + + if(!fkReconstructor->IsWritingClusters()){ fClusters = AliTRDReconstructor::GetClusters(); } else { - if (ReadClusters(fClusters, cTree)) { + if(!ReadClusters(cTree)) { AliError("Problem with reading the clusters !"); return 1; } @@ -1602,7 +1979,7 @@ 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 @@ -1616,7 +1993,7 @@ Int_t AliTRDtrackerV1::LoadClusters(TClonesArray *clusters) fClusters = clusters; SetClustersOwner(); - //Int_t nin = + fkRecoParam = fkReconstructor->GetRecoParam(); // load reco param for this event BuildTrackingContainers(); //Int_t ncl = fClusters->GetEntriesFast(); @@ -1631,22 +2008,22 @@ Int_t AliTRDtrackerV1::BuildTrackingContainers() { // Building tracking containers for clusters - Int_t nin =0, icl = fClusters->GetEntriesFast(); - while (icl--) { - AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(icl); + Int_t nin(0), ncl(fClusters->GetEntriesFast()); + while (ncl--) { + AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl); 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); Int_t layer = fGeom->GetLayer(detector); - fTrSec[sector].GetChamber(stack, layer, kTRUE)->InsertCluster(c, icl); + fTrSec[sector].GetChamber(stack, layer, kTRUE)->InsertCluster(c, ncl); } - 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(); @@ -1679,26 +2063,26 @@ void AliTRDtrackerV1::UnloadClusters() AliTRDtrackerDebug::SetEventNumber(AliTRDtrackerDebug::GetEventNumber() + 1); } -//____________________________________________________________________ -void AliTRDtrackerV1::UseClusters(const AliKalmanTrack *t, Int_t) const -{ - const AliTRDtrackV1 *track = dynamic_cast(t); - if(!track) return; - - AliTRDseedV1 *tracklet = 0x0; - for(Int_t ily=AliTRDgeometry::kNlayer; ily--;){ - if(!(tracklet = track->GetTracklet(ily))) continue; - AliTRDcluster *c = 0x0; - for(Int_t ic=AliTRDseed::knTimebins; ic--;){ - if(!(c=tracklet->GetClusters(ic))) continue; - c->Use(); - } - } -} - +// //____________________________________________________________________ +// void AliTRDtrackerV1::UseClusters(const AliKalmanTrack *t, Int_t) const +// { +// const AliTRDtrackV1 *track = dynamic_cast(t); +// if(!track) return; +// +// AliTRDseedV1 *tracklet = NULL; +// for(Int_t ily=AliTRDgeometry::kNlayer; ily--;){ +// if(!(tracklet = track->GetTracklet(ily))) continue; +// AliTRDcluster *c = NULL; +// for(Int_t ic=AliTRDseed::kNclusters; ic--;){ +// if(!(c=tracklet->GetClusters(ic))) continue; +// c->Use(); +// } +// } +// } +// //_____________________________________________________________________________ -Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *track) +Bool_t AliTRDtrackerV1::AdjustSector(AliTRDtrackV1 *const track) { // // Rotates the track when necessary @@ -1725,7 +2109,7 @@ 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 @@ -1739,13 +2123,13 @@ 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 // @@ -1768,7 +2152,7 @@ AliTRDseedV1* AliTRDtrackerV1::SetTracklet(AliTRDseedV1 *tracklet) } //____________________________________________________________________ -AliTRDtrackV1* AliTRDtrackerV1::SetTrack(AliTRDtrackV1 *track) +AliTRDtrackV1* AliTRDtrackerV1::SetTrack(const AliTRDtrackV1 * const track) { // Add this track to the list of tracks stored in the tracker // @@ -1814,39 +2198,52 @@ 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 * fkRecoParam->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 (fkRecoParam->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. @@ -1874,8 +2271,8 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon // 8. Build ESD track and register it to the output list // - const AliTRDCalDet *cal = AliTRDcalibDB::Instance()->GetT0Det(); - AliTRDtrackingChamber *chamber = 0x0; + AliTRDtrackingChamber *chamber = NULL; + AliTRDtrackingChamber **ci = NULL; AliTRDseedV1 sseed[kMaxTracksStack*6]; // to be initialized Int_t pars[4]; // MakeSeeds parameters @@ -1883,9 +2280,16 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon //Double_t shift = .5 * alpha; Int_t configs[kNConfigs]; + // Purge used clusters from the containers + ci = &stack[0]; + for(Int_t ic = kNPlanes; ic--; ci++){ + if(!(*ci)) continue; + (*ci)->Update(); + } + // Build initial seeding configurations Double_t quality = BuildSeedingConfigs(stack, configs); - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ + if(fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 10){ AliInfo(Form("Plane config %d %d %d Quality %f" , configs[0], configs[1], configs[2], quality)); } @@ -1898,28 +2302,35 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon fSieveSeeding = 0; // Get stack index - Int_t ic = 0; AliTRDtrackingChamber **cIter = &stack[0]; - while(icGetStack((*cIter)->GetDetector()); + Int_t ic = 0; ci = &stack[0]; + while(icGetStack((*ci)->GetDetector()); do{ // Loop over seeding configurations ntracks = 0; ntracks1 = 0; - for (Int_t iconf = 0; iconf<3; iconf++) { + for (Int_t iconf = 0; iconfGetNumberOfSeedConfigs(); iconf++) { pars[0] = configs[iconf]; 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) > 1) 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; // Sort the seeds according to their quality - Int_t sort[kMaxTracksStack]; + Int_t sort[kMaxTracksStack+1]; TMath::Sort(ntracks, fTrackQuality, sort, kTRUE); + if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1") > 2){ + AliDebug(3, "Track candidates classification:"); + for (Int_t it(0); it < ntracks; it++) { + Int_t jt(sort[it]); + printf(" %2d idx[%d] Quality[%e]\n", it, jt, fTrackQuality[jt]); + } + } // Initialize number of tracks so far and logic switches Int_t ntracks0 = esdTrackList->GetEntriesFast(); @@ -1932,18 +2343,13 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon //AliInfo("Selecting track candidates ..."); // Sieve clusters in decreasing order of track quality - Double_t trackParams[7]; - // AliTRDseedV1 *lseed = 0x0; - Int_t jSieve = 0, candidates; + Int_t jSieve(0), rejectedCandidates(0); do{ - //AliInfo(Form("\t\tITER = %i ", jSieve)); - // Check track candidates - candidates = 0; + rejectedCandidates=0; for (Int_t itrack = 0; itrack < ntracks; itrack++) { Int_t trackIndex = sort[itrack]; if (signedTrack[trackIndex] || fakeTrack[trackIndex]) continue; - // Calculate track parameters from tracklets seeds Int_t ncl = 0; @@ -1952,219 +2358,143 @@ Int_t AliTRDtrackerV1::Clusters2TracksStack(AliTRDtrackingChamber **stack, TClon Int_t findable = 0; for (Int_t jLayer = 0; jLayer < kNPlanes; jLayer++) { Int_t jseed = kNPlanes*trackIndex+jLayer; - if(!sseed[jseed].IsOK()) continue; - if (TMath::Abs(sseed[jseed].GetYref(0) / sseed[jseed].GetX0()) < 0.15) findable++; - sseed[jseed].UpdateUsed(); - ncl += sseed[jseed].GetN2(); + if(!sseed[jseed].IsOK()) continue; + // check if primary candidate + if (TMath::Abs(sseed[jseed].GetYref(0) / sseed[jseed].GetX0()) < 0.158) findable++; + ncl += sseed[jseed].GetN(); nused += sseed[jseed].GetNUsed(); nlayers++; } - // Filter duplicated tracks - if (nused > 30){ - //printf("Skip %d nused %d\n", trackIndex, nused); - fakeTrack[trackIndex] = kTRUE; - continue; - } - if (Float_t(nused)/ncl >= .25){ - //printf("Skip %d nused/ncl >= .25\n", trackIndex); - fakeTrack[trackIndex] = kTRUE; - continue; - } - - // Classify tracks - Bool_t skip = kFALSE; - switch(jSieve){ - case 0: - if(nlayers < 6) {skip = kTRUE; break;} - if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} - break; - - case 1: - if(nlayers < findable){skip = kTRUE; break;} - if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -4.){skip = kTRUE; break;} - break; - - case 2: - if ((nlayers == findable) || (nlayers == 6)) { skip = kTRUE; break;} - if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -6.0){skip = kTRUE; break;} - break; - - case 3: - if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} - break; - - case 4: - if (nlayers == 3){skip = kTRUE; break;} - //if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) - nused/(nlayers-3.0) < -15.0){skip = kTRUE; break;} - break; - } - if(skip){ - candidates++; - //printf("REJECTED : %d [%d] nlayers %d trackQuality = %e nused %d\n", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused); - continue; - } - signedTrack[trackIndex] = kTRUE; - - - // Sign clusters - AliTRDcluster *cl = 0x0; Int_t clusterIndex = -1; - for (Int_t jLayer = 0; jLayer < kNPlanes; jLayer++) { - Int_t jseed = kNPlanes*trackIndex+jLayer; - if(!sseed[jseed].IsOK()) continue; - if(TMath::Abs(sseed[jseed].GetYfit(1) - sseed[jseed].GetYfit(1)) >= .2) continue; // check this condition with Marian - sseed[jseed].UseClusters(); - if(!cl){ - ic = 0; - while(!(cl = sseed[jseed].GetClusters(ic))) ic++; - clusterIndex = sseed[jseed].GetIndexes(ic); - } - } - if(!cl) continue; + // Filter duplicated tracks + if (nused > 30){ + AliDebug(4, Form("REJECTED : %d idx[%d] quality[%e] tracklets[%d] usedClusters[%d]", itrack, trackIndex, fTrackQuality[trackIndex], nlayers, nused)); + fakeTrack[trackIndex] = kTRUE; + continue; + } + if (ncl>0 && Float_t(nused)/ncl >= .25){ + AliDebug(4, Form("REJECTED : %d idx[%d] quality[%e] tracklets[%d] usedClusters[%d] used/ncl[%f]", itrack, trackIndex, fTrackQuality[trackIndex], nlayers, nused, Float_t(nused)/ncl)); + fakeTrack[trackIndex] = kTRUE; + continue; + } - - // Build track parameters - AliTRDseedV1 *lseed =&sseed[trackIndex*6]; -/* Int_t idx = 0; - while(idx<3 && !lseed->IsOK()) { - idx++; - lseed++; - }*/ - Double_t x = lseed->GetX0();// - 3.5; - trackParams[0] = x; //NEW AB - trackParams[1] = lseed->GetYref(0); // lseed->GetYat(x); - trackParams[2] = lseed->GetZref(0); // lseed->GetZat(x); - trackParams[3] = TMath::Sin(TMath::ATan(lseed->GetYref(1))); - trackParams[4] = lseed->GetZref(1) / TMath::Sqrt(1. + lseed->GetYref(1) * lseed->GetYref(1)); - trackParams[5] = lseed->GetC(); - Int_t ich = 0; while(!(chamber = stack[ich])) ich++; - trackParams[6] = fGeom->GetSector(chamber->GetDetector());/* *alpha+shift; // Supermodule*/ - - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ - AliInfo(Form("Track %d [%d] nlayers %d trackQuality = %e nused %d, yref = %3.3f", itrack, trackIndex, nlayers, fTrackQuality[trackIndex], nused, trackParams[1])); - - Int_t nclusters = 0; - AliTRDseedV1 *dseed[6]; - - // Build track label - what happens if measured data ??? - Int_t labels[1000]; - Int_t outlab[1000]; - Int_t nlab = 0; - - Int_t labelsall[1000]; - Int_t nlabelsall = 0; - Int_t naccepted = 0; - - for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { - Int_t jseed = kNPlanes*trackIndex+iLayer; - dseed[iLayer] = new AliTRDseedV1(sseed[jseed]); - dseed[iLayer]->SetOwner(); - nclusters += sseed[jseed].GetN2(); - if(!sseed[jseed].IsOK()) continue; - for(int ilab=0; ilab<2; ilab++){ - if(sseed[jseed].GetLabels(ilab) < 0) continue; - labels[nlab] = sseed[jseed].GetLabels(ilab); - nlab++; - } + AliDebug(4, Form("Candidate[%d] Quality[%e] Tracklets[%d] Findable[%d] Ncl[%d] Nused[%d]", trackIndex, fTrackQuality[trackIndex], nlayers, findable, ncl, nused)); + + // Classify tracks + Bool_t skip = kFALSE; + switch(jSieve){ + case 0: // select 6 tracklets primary tracks, good quality + if(nlayers > findable || nlayers < kNPlanes) {skip = kTRUE; break;} + if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} + break; + + case 1: // select shorter primary tracks, good quality + //if(findable<4){skip = kTRUE; break;} + if(nlayers < findable){skip = kTRUE; break;} + if(TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -4.){skip = kTRUE; break;} + break; + + case 2: // select 6 tracklets secondary tracks + if(nlayers < kNPlanes) { skip = kTRUE; break;} + if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -6.0){skip = kTRUE; break;} + break; + + case 3: // select shorter tracks, good quality + if (nlayers<4){skip = kTRUE; break;} + if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) < -5.){skip = kTRUE; break;} + break; + + case 4: // select anything with at least 4 tracklets + if (nlayers<4){skip = kTRUE; break;} + //if (TMath::Log(1.E-9+fTrackQuality[trackIndex]) - nused/(nlayers-3.0) < -15.0){skip = kTRUE; break;} + break; + } + if(skip){ + rejectedCandidates++; + 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; - // Cooking label - for (Int_t itime = 0; itime < fgNTimeBins; itime++) { - if(!sseed[jseed].IsUsable(itime)) continue; - naccepted++; - Int_t tindex = 0, ilab = 0; - while(ilab<3 && (tindex = sseed[jseed].GetClusters(itime)->GetLabel(ilab)) >= 0){ - labelsall[nlabelsall++] = tindex; - ilab++; + AliTRDseedV1 *lseed =&sseed[trackIndex*kNPlanes]; + AliTRDtrackV1 *track = MakeTrack(lseed); + if(!track){ + AliDebug(1, "Track building failed."); + continue; + } else { + if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1") > 1){ + Int_t ich = 0; while(!(chamber = stack[ich])) ich++; + AliDebug(2, Form("Track pt=%7.2fGeV/c SM[%2d] Done.", track->Pt(), fGeom->GetSector(chamber->GetDetector()))); + } } - } - } - Freq(nlab,labels,outlab,kFALSE); - Int_t label = outlab[0]; - Int_t frequency = outlab[1]; - Freq(nlabelsall,labelsall,outlab,kFALSE); - Int_t label1 = outlab[0]; - Int_t label2 = outlab[2]; - Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted); - //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); - cstreamer << "Clusters2TracksStack" - << "EventNumber=" << eventNumber - << "TrackNumber=" << trackNumber - << "CandidateNumber=" << candidateNumber - << "Iter=" << fSieveSeeding - << "Like=" << fTrackQuality[trackIndex] - << "S0.=" << dseed[0] - << "S1.=" << dseed[1] - << "S2.=" << dseed[2] - << "S3.=" << dseed[3] - << "S4.=" << dseed[4] - << "S5.=" << dseed[5] - << "p0=" << trackParams[0] - << "p1=" << trackParams[1] - << "p2=" << trackParams[2] - << "p3=" << trackParams[3] - << "p4=" << trackParams[4] - << "p5=" << trackParams[5] - << "p6=" << trackParams[6] - << "Label=" << label - << "Label1=" << label1 - << "Label2=" << label2 - << "FakeRatio=" << fakeratio - << "Freq=" << frequency - << "Ncl=" << ncl - << "NLayers=" << nlayers - << "Findable=" << findable - << "NUsed=" << nused - << "\n"; - } - - AliTRDtrackV1 *track = MakeTrack(&sseed[trackIndex*kNPlanes], trackParams); - if(!track){ - AliWarning("Fail to build a TRD Track."); - continue; - } - - //AliInfo("End of MakeTrack()"); - AliESDtrack *esdTrack = new ((*esdTrackList)[ntracks0++]) AliESDtrack(); - esdTrack->UpdateTrackParams(track, AliESDtrack::kTRDout); - esdTrack->SetLabel(track->GetLabel()); - track->UpdateESDtrack(esdTrack); - // write ESD-friends if neccessary - if (fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 0){ - AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(*track); - calibTrack->SetOwner(); - esdTrack->AddCalibObject(calibTrack); - } - ntracks1++; - AliTRDtrackerDebug::SetTrackNumber(AliTRDtrackerDebug::GetTrackNumber() + 1); + if(fkRecoParam->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(); + Int_t eventNumber = AliTRDtrackerDebug::GetEventNumber(); + Int_t trackNumber = AliTRDtrackerDebug::GetTrackNumber(); + Int_t candidateNumber = AliTRDtrackerDebug::GetCandidateNumber(); + TTreeSRedirector &cstreamer = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); + cstreamer << "Clusters2TracksStack" + << "EventNumber=" << eventNumber + << "TrackNumber=" << trackNumber + << "CandidateNumber=" << candidateNumber + << "Iter=" << fSieveSeeding + << "Like=" << fTrackQuality[trackIndex] + << "S0.=" << dseed[0] + << "S1.=" << dseed[1] + << "S2.=" << dseed[2] + << "S3.=" << dseed[3] + << "S4.=" << dseed[4] + << "S5.=" << dseed[5] + << "Ncl=" << ncl + << "NLayers=" << nlayers + << "Findable=" << findable + << "NUsed=" << nused + << "\n"; + } + + + AliESDtrack *esdTrack = new ((*esdTrackList)[ntracks0++]) AliESDtrack(); + esdTrack->UpdateTrackParams(track, AliESDtrack::kTRDout); + esdTrack->SetLabel(track->GetLabel()); + track->UpdateESDtrack(esdTrack); + // write ESD-friends if neccessary + if (fkRecoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 0){ + AliTRDtrackV1 *calibTrack = new AliTRDtrackV1(*track); + calibTrack->SetOwner(); + esdTrack->AddCalibObject(calibTrack); + } + ntracks1++; + AliTRDtrackerDebug::SetTrackNumber(AliTRDtrackerDebug::GetTrackNumber() + 1); } jSieve++; - } while(jSieve<5 && candidates); // end track candidates sieve + } while(jSieve<5 && rejectedCandidates); // end track candidates sieve if(!ntracks1) break; // 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); + chamber->Build(fGeom);//Indices(fSieveSeeding); } - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ + if(fkRecoParam->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 @@ -2203,15 +2533,15 @@ Double_t AliTRDtrackerV1::BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int // The overall chamber quality is given by the product of this 2 contributions. // - Double_t chamberQ[kNPlanes]; - AliTRDtrackingChamber *chamber = 0x0; + Double_t chamberQ[kNPlanes];memset(chamberQ, 0, kNPlanes*sizeof(Double_t)); + AliTRDtrackingChamber *chamber = NULL; for(int iplane=0; iplaneGetQuality() : 0.; } - Double_t tconfig[kNConfigs]; - Int_t planes[4]; + Double_t tconfig[kNConfigs];memset(tconfig, 0, kNConfigs*sizeof(Double_t)); + Int_t planes[] = {0, 0, 0, 0}; for(int iconf=0; iconf 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]; @@ -2288,11 +2629,7 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss // chi2[1] = tracklet chi2 on the R direction Double_t chi2[4]; - // Default positions for the anode wire in all 6 Layers in case of a stack with missing clusters - // Positions taken using cosmic data taken with SM3 after rebuild - Double_t x_def[kNPlanes] = {300.2, 312.8, 325.4, 338.0, 350.6, 363.2}; - - // this should be data member of AliTRDtrack + // this should be data member of AliTRDtrack TODO Double_t seedQuality[kMaxTracksStack]; // unpack control parameters @@ -2300,32 +2637,49 @@ 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 - AliTRDpadPlane *pp = 0x0; + Float_t padwidth[kNPlanes]; // pad widths + AliTRDpadPlane *pp = NULL; for(int iplane=0; iplaneGetPadPlane(iplane, istack); hL[iplane] = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle()); padlength[iplane] = pp->GetLengthIPad(); + padwidth[iplane] = pp->GetWidthIPad(); } - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) > 1){ - AliInfo(Form("Making seeds Stack[%d] Config[%d] Tracks[%d]...", istack, config, ntracks)); + // Init anode wire position for chambers + Double_t x0[kNPlanes], // anode wire position + driftLength = .5*AliTRDgeometry::AmThick() - AliTRDgeometry::DrThick(); // drift length + TGeoHMatrix *matrix = NULL; + Double_t loc[] = {AliTRDgeometry::AnodePos(), 0., 0.}; + Double_t glb[] = {0., 0., 0.}; + AliTRDtrackingChamber **cIter = &stack[0]; + for(int iLayer=0; iLayerGetClusterMatrix((*cIter)->GetDetector()))){ + x0[iLayer] = fgkX0[iLayer]; + continue; + } + matrix->LocalToMaster(loc, glb); + x0[iLayer] = glb[0]; } + 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 < 4) return ntracks; + if(nlayers < kNSeedPlanes) return ntracks; // Start finding seeds @@ -2341,9 +2695,9 @@ 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); @@ -2351,31 +2705,37 @@ 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(); FitRieman(c, chi2); AliTRDseedV1 *tseed = &cseed[0]; - AliTRDtrackingChamber **cIter = &stack[0]; + cIter = &stack[0]; for(int iLayer=0; iLayerSetDetector((*cIter) ? (*cIter)->GetDetector() : -1); + Int_t det = (*cIter) ? (*cIter)->GetDetector() : -1; + tseed->SetDetector(det); tseed->SetTilt(hL[iLayer]); tseed->SetPadLength(padlength[iLayer]); - tseed->SetReconstructor(fReconstructor); - tseed->SetX0((*cIter) ? (*cIter)->GetX() : x_def[iLayer]); + tseed->SetPadWidth(padwidth[iLayer]); + 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(fkRecoParam->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; @@ -2388,7 +2748,7 @@ 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 @@ -2418,43 +2778,57 @@ 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] > fkRecoParam->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] > fkRecoParam->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 nUsedCl = 0; - Int_t mlayers = 0; + Int_t mlayers = 0; + AliTRDcluster *cl = NULL; for(int iLayer=0; iLayer 25) break; + Int_t nNotInChamber = 0; + if(!cseed[jLayer].AttachClusters(stack[jLayer], kTRUE)) continue; + if(/*fkReconstructor->IsHLT()*/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) < fkRecoParam->GetTrackLikelihood()){ + AliDebug(3, Form("Filter on likelihood %f[%e].", TMath::Log(1.E-9 + like), like)); AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); continue; } @@ -2479,7 +2859,7 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss fSeedLayer[ntracks] = config;/*sLayer;*/ // attach clusters to the extrapolation seeds - Int_t nusedf = 0; // debug value + Int_t elayers(0); for(int iLayer=0; iLayerGetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + if(fkRecoParam->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(); @@ -2514,57 +2896,24 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss << "\n"; } - if(fReconstructor->GetRecoParam()->HasImproveTracklets() && ImproveSeedQuality(stack, cseed) < 4){ - AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); - continue; - } - //AliInfo("Improve seed quality done."); - - // fit full track and cook likelihoods - // Double_t curv = FitRieman(&cseed[0], chi2); - // Double_t chi2ZF = chi2[0] / TMath::Max((mlayers - 3.), 1.); - // Double_t chi2RF = chi2[1] / TMath::Max((mlayers - 3.), 1.); - - // do the final track fitting (Once with vertex constraint and once without vertex constraint) - Double_t chi2Vals[3]; - chi2Vals[0] = FitTiltedRieman(&cseed[0], kFALSE); - if(fReconstructor->GetRecoParam()->IsVertexConstrained()) - chi2Vals[1] = FitTiltedRiemanConstraint(&cseed[0], GetZ()); // Do Vertex Constrained fit if desired - else - chi2Vals[1] = 1.; - chi2Vals[2] = GetChi2Z(&cseed[0]) / TMath::Max((mlayers - 3.), 1.); - // Chi2 definitions in testing stage - //chi2Vals[2] = GetChi2ZTest(&cseed[0]); - fTrackQuality[ntracks] = CalculateTrackLikelihood(&cseed[0], &chi2Vals[0]); - //AliInfo("Hyperplane fit done\n"); - - // finalize tracklets - Int_t labels[12]; - Int_t outlab[24]; - Int_t nlab = 0; - for (Int_t iLayer = 0; iLayer < 6; iLayer++) { - if (!cseed[iLayer].IsOK()) continue; - - if (cseed[iLayer].GetLabels(0) >= 0) { - labels[nlab] = cseed[iLayer].GetLabels(0); - nlab++; + if(fkRecoParam->HasImproveTracklets()){ + if(!ImproveSeedQuality(stack, cseed, chi2Vals[0])){ + AliTRDtrackerDebug::SetCandidateNumber(AliTRDtrackerDebug::GetCandidateNumber() + 1); + AliDebug(3, "ImproveSeedQuality() failed."); } - - if (cseed[iLayer].GetLabels(1) >= 0) { - labels[nlab] = cseed[iLayer].GetLabels(1); - nlab++; - } - } - Freq(nlab,labels,outlab,kFALSE); - Int_t label = outlab[0]; - Int_t frequency = outlab[1]; - for (Int_t iLayer = 0; iLayer < 6; iLayer++) { - cseed[iLayer].SetFreq(frequency); - cseed[iLayer].SetChi2Z(chi2[1]); } - - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ - TTreeSRedirector &cstreamer = *fReconstructor->GetDebugStream(AliTRDReconstructor::kTracker); + + // do track fitting with vertex constraint + if(fkRecoParam->IsVertexConstrained()) chi2Vals[1] = FitTiltedRiemanConstraint(&cseed[0], GetZ()); + else chi2Vals[1] = -1.; + chi2Vals[2] = GetChi2Z(&cseed[0]); + chi2Vals[3] = GetChi2Phi(&cseed[0]); + + // calculate track quality + fTrackQuality[ntracks] = CalculateTrackLikelihood(&chi2Vals[0]); + + if(fkRecoParam->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(); @@ -2580,8 +2929,6 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss << "Chi2TC=" << chi2Vals[1] << "Nlayers=" << mlayers << "NClusters=" << ncls - << "NUsedS=" << nUsedCl - << "NUsed=" << nusedf << "Like=" << like << "S0.=" << &cseed[0] << "S1.=" << &cseed[1] @@ -2589,13 +2936,33 @@ Int_t AliTRDtrackerV1::MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *ss << "S3.=" << &cseed[3] << "S4.=" << &cseed[4] << "S5.=" << &cseed[5] - << "Label=" << label - << "Freq=" << frequency << "FitterT.=" << fitterT << "FitterTC.=" << fitterTC << "\n"; } - + if(AliLog::GetDebugLevel("TRD", "AliTRDtrackerV1")){ + Double_t pt[]={0., 0.}; + for(Int_t il(0); ilIsHLT()) FitTiltedRiemanConstraint(tracklet, 0); Double_t alpha = AliTRDgeometry::GetAlpha(); Double_t shift = AliTRDgeometry::GetAlpha()/2.0; - Double_t c[15]; - c[ 0] = 0.2; - c[ 1] = 0.0; c[ 2] = 2.0; - c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02; - c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1; - c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01; - - AliTRDtrackV1 track(seeds, ¶ms[1], c, params[0], params[6]*alpha+shift); - track.PropagateTo(params[0]-5.0); - if(fReconstructor->IsHLT()){ - AliTRDseedV1 *ptrTracklet = 0x0; - for(Int_t ip=0; ip2){ AliDebug(1, Form("Found suspect track start @ layer idx[%d]\n" + " %c[0] x0[%f] n[%d] nu[%d] OK[%c]\n" + " %c[1] x0[%f] n[%d] nu[%d] OK[%c]\n" + " %c[2] x0[%f] n[%d] nu[%d] OK[%c]\n" + " %c[3] x0[%f] n[%d] nu[%d] OK[%c]\n" + " %c[4] x0[%f] n[%d] nu[%d] OK[%c]\n" + " %c[5] x0[%f] n[%d] nu[%d] OK[%c]" + ,idx + ,idx==0?'*':' ', tracklet[0].GetX0(), tracklet[0].GetN(), tracklet[0].GetNUsed(), tracklet[0].IsOK()?'y':'n' + ,idx==1?'*':' ', tracklet[1].GetX0(), tracklet[1].GetN(), tracklet[1].GetNUsed(), tracklet[1].IsOK()?'y':'n' + ,idx==2?'*':' ', tracklet[2].GetX0(), tracklet[2].GetN(), tracklet[2].GetNUsed(), tracklet[2].IsOK()?'y':'n' + ,idx==3?'*':' ', tracklet[3].GetX0(), tracklet[3].GetN(), tracklet[3].GetNUsed(), tracklet[3].IsOK()?'y':'n' + ,idx==4?'*':' ', tracklet[4].GetX0(), tracklet[4].GetN(), tracklet[4].GetNUsed(), tracklet[4].IsOK()?'y':'n' + ,idx==5?'*':' ', tracklet[5].GetX0(), tracklet[5].GetN(), tracklet[5].GetNUsed(), tracklet[5].IsOK()?'y':'n')); + return NULL; + } + + Double_t dx(5.); + Double_t x(tracklet[idx].GetX0() - dx); + // Build track parameters + Double_t params[] = { + tracklet[idx].GetYref(0) - dx*tracklet[idx].GetYref(1) // y + ,tracklet[idx].GetZref(0) - dx*tracklet[idx].GetZref(1) // z + ,TMath::Sin(TMath::ATan(tracklet[idx].GetYref(1))) // snp + ,tracklet[idx].GetZref(1) / TMath::Sqrt(1. + tracklet[idx].GetYref(1) * tracklet[idx].GetYref(1)) // tgl + ,tracklet[idx].GetC(fkReconstructor->IsHLT()?1:0) // curvature -> 1/pt + }; + Int_t sector(fGeom->GetSector(tracklet[idx].GetDetector())); + + Double_t c[15]; + 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[4]*params[4]*0.01; // s^2_1/pt + + AliTRDtrackV1 track(tracklet, params, c, x, sector*alpha+shift); + + AliTRDseedV1 *ptrTracklet = NULL; + + // skip Kalman filter for HLT + if(/*fkReconstructor->IsHLT()*/kFALSE){ + for (Int_t jLayer = 0; jLayer < AliTRDgeometry::kNlayer; jLayer++) { + track.UnsetTracklet(jLayer); + ptrTracklet = &tracklet[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(fkRecoParam->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); + track.GetExternalParameters(x, p); + TTreeSRedirector &cs = *fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker); cs << "MakeTrack" << "EventNumber=" << eventNumber << "CandidateNumber=" << candidateNumber << "nc=" << nc - << "X=" << params[0] + << "X=" << x << "Y=" << p[0] << "Z=" << p[1] << "snp=" << p[2] << "tnd=" << p[3] << "crv=" << p[4] - << "Yin=" << params[1] - << "Zin=" << params[2] - << "snpin=" << params[3] - << "tndin=" << params[4] - << "crvin=" << params[5] + << "Yin=" << params[0] + << "Zin=" << params[1] + << "snpin=" << params[2] + << "tndin=" << params[3] + << "crvin=" << params[4] << "track.=" << &track << "\n"; } - if (nc < 30) return 0x0; - + if (nc < 30){ + UnsetTrackletsTrack(&track); + return NULL; + } AliTRDtrackV1 *ptrTrack = SetTrack(&track); - ptrTrack->SetReconstructor(fReconstructor); + ptrTrack->SetReconstructor(fkReconstructor); ptrTrack->CookLabel(.9); - + for(Int_t il(kNPlanes); il--;){ + if(!(ptrTracklet = ptrTrack->GetTracklet(il))) continue; + ptrTracklet->UseClusters(); + } + // computes PID for track ptrTrack->CookPID(); // update calibration references using this track AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance(); - if (!calibra){ - AliInfo("Could not get Calibra instance\n"); - if(calibra->GetHisto2d()) calibra->UpdateHistogramsV1(ptrTrack); + if(!calibra){ + AliInfo("Could not get Calibra instance."); + } else if(calibra->GetHisto2d()){ + calibra->UpdateHistogramsV1(ptrTrack); } return ptrTrack; } //____________________________________________________________________ -Int_t AliTRDtrackerV1::ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *cseed) +Bool_t AliTRDtrackerV1::ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *cseed, Double_t &chi2) { // // Sort tracklets according to "quality" and try to "improve" the first 4 worst @@ -2707,7 +3132,7 @@ Int_t AliTRDtrackerV1::ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDs // layers : Array of propagation layers for a stack/supermodule // cseed : Array of 6 seeding tracklets which has to be improved // - // Output : + // Output : // cssed : Improved seeds // // Detailed description @@ -2720,66 +3145,87 @@ 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(1.e3), + lQuality[AliTRDgeometry::kNlayer] = {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]; + } + quality /= rLayers; + AliDebug(2, Form("Start N[%d] Q[%f] chi2[%f]", rLayers, quality, chi2)); 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]; + // Try better cluster set + Int_t nLayers(0); Float_t qualitynew(0.); + Int_t indexes[4*AliTRDgeometry::kNlayer]; + 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].AttachClustersIter(chamber, squality[bLayer], kTRUE); - if(bseed[bLayer].IsOK()) nLayers++; + if(!bseed[bLayer].AttachClusters(chamber, kTRUE)) continue; + bseed[bLayer].Fit(1); + if(!bseed[bLayer].IsOK()) continue; + nLayers++; + lQuality[jLayer] = bseed[jLayer].GetQuality(kTRUE); + qualitynew += lQuality[jLayer]; } - - chi2 = FitTiltedRieman(bseed, kTRUE); - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 7){ + if(rLayers > nLayers){ + AliDebug(1, Form("Lost %d tracklets while improving.", rLayers-nLayers)); + return iter>0?kTRUE:kFALSE; + } else rLayers=nLayers; + qualitynew /= rLayers; + + if(qualitynew > quality){ + AliDebug(4, Form("Quality[%f] worsen in iter[%d] to ref[%f].", qualitynew, iter, quality)); + return iter>0?kTRUE:kFALSE; + } else quality = qualitynew; + + // try improve track parameters + Float_t chi2new = FitTiltedRieman(bseed, kTRUE); + if(chi2new > chi2){ + AliDebug(4, Form("Chi2[%f] worsen in iter[%d] to ref[%f].", chi2new, iter, chi2)); + return iter>0?kTRUE:kFALSE; + } else chi2 = chi2new; + + // store better tracklets + for(Int_t jLayer=AliTRDgeometry::kNlayer; jLayer--;) cseed[jLayer]=bseed[jLayer]; + AliDebug(2, Form("Iter[%d] Q[%f] chi2[%f]", iter, quality, chi2)); + + + if(fkRecoParam->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.=" << &cseed[0] + << "S1.=" << &cseed[1] + << "S2.=" << &cseed[2] + << "S3.=" << &cseed[3] + << "S4.=" << &cseed[4] + << "S5.=" << &cseed[5] + << "FitterT.=" << tiltedRieman + << "\n"; } } // Loop: iter - - // we are sure that at least 2 tracklets are OK ! - return nLayers+2; + + // we are sure that at least 4 tracklets are OK ! + return kTRUE; } //_________________________________________________________________________ -Double_t AliTRDtrackerV1::CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2){ +Double_t AliTRDtrackerV1::CalculateTrackLikelihood(Double_t *chi2){ // // Calculates the Track Likelihood value. This parameter serves as main quality criterion for // the track selection @@ -2797,37 +3243,53 @@ Double_t AliTRDtrackerV1::CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Doub // // debug level 2 // - - Double_t sumdaf = 0, nLayers = 0; - for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { - if(!tracklets[iLayer].IsOK()) continue; - sumdaf += TMath::Abs((tracklets[iLayer].GetYfit(1) - tracklets[iLayer].GetYref(1))/ tracklets[iLayer].GetSigmaY2()); - nLayers++; - } - sumdaf /= Float_t (nLayers - 2.0); - Double_t likeChi2Z = TMath::Exp(-chi2[2] * 0.14); // Chi2Z - Double_t likeChi2TC = (fReconstructor->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 likeAF = TMath::Exp(-sumdaf * 3.23); - Double_t trackLikelihood = likeChi2Z * likeChi2TR * likeAF; - - if(fReconstructor->GetStreamLevel(AliTRDReconstructor::kTracker) >= 2){ + // Non-constrained Tilted Riemann + Double_t likeChi2TR = TMath::Exp(-chi2[0] * 0.0078); + // Constrained Tilted Riemann + Double_t likeChi2TC(1.); + if(chi2[1]>0.){ + likeChi2TC = TMath::Exp(-chi2[1] * 0.677); + Double_t r = likeChi2TC/likeChi2TR; + if(r>1.e2){;} // -> a primary track use TC + else if(r<1.e2) // -> a secondary track use TR + likeChi2TC =1.; + else{;} // -> test not conclusive + } + // Chi2 only on Z direction + Double_t likeChi2Z = TMath::Exp(-chi2[2] * 0.14); + // Chi2 angular resolution + Double_t likeChi2Phi= TMath::Exp(-chi2[3] * 3.23); + + Double_t trackLikelihood = likeChi2Z * likeChi2TR * likeChi2TC * likeChi2Phi; + + AliDebug(2, Form("Likelihood [%e]\n" + " Rieman : chi2[%f] likelihood[%6.2e]\n" + " Vertex : chi2[%f] likelihood[%6.2e]\n" + " Z : chi2[%f] likelihood[%6.2e]\n" + " Phi : chi2[%f] likelihood[%6.2e]" + , trackLikelihood + , chi2[0], likeChi2TR + , chi2[1], likeChi2TC + , chi2[2], likeChi2Z + , chi2[3], likeChi2Phi + )); + + if(fkRecoParam->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 << "LikeChi2Z=" << likeChi2Z << "LikeChi2TR=" << likeChi2TR << "LikeChi2TC=" << likeChi2TC - << "LikeAF=" << likeAF + << "LikeChi2Phi=" << likeChi2Phi << "TrackLikelihood=" << trackLikelihood << "\n"; } - + return trackLikelihood; } @@ -2859,8 +3321,6 @@ 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(); - Double_t chi2y = GetChi2Y(&cseed[0]); Double_t chi2z = GetChi2Z(&cseed[0]); @@ -2869,30 +3329,29 @@ Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]) for(UChar_t ilayer = 0; ilayer < 4; ilayer++){ Int_t jlayer = planes[ilayer]; nclusters += cseed[jlayer].GetN2(); - sumda += TMath::Abs(cseed[jlayer].GetYfitR(1) - cseed[jlayer].GetYref(1)); + sumda += TMath::Abs(cseed[jlayer].GetYfit(1) - cseed[jlayer].GetYref(1)); } nclusters *= .25; - Double_t likea = TMath::Exp(-sumda * fRecoPars->GetPhiSlope()); + Double_t likea = TMath::Exp(-sumda * fkRecoParam->GetPhiSlope()); Double_t likechi2y = 0.0000000001; - if (fReconstructor->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()); + if (fkReconstructor->IsCosmic() || chi2y < fkRecoParam->GetChi2YCut()) likechi2y += TMath::Exp(-TMath::Sqrt(chi2y) * fkRecoParam->GetChi2YSlope()); + Double_t likechi2z = TMath::Exp(-chi2z * fkRecoParam->GetChi2ZSlope()); + Double_t likeN = TMath::Exp(-(fkRecoParam->GetNMeanClusters() - nclusters) / fkRecoParam->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(fkRecoParam->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 @@ -2911,7 +3370,7 @@ Double_t AliTRDtrackerV1::CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]) << "nclusters=" << nclusters << "likeN=" << likeN << "like=" << like - << "meanncls=" << mean_ncls + << "meanncls=" << meanNcls << "\n"; } @@ -3142,181 +3601,241 @@ 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; -} - -//____________________________________________________________________ -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()); + return idx >= 0 && idx < ntrk ? (AliKalmanTrack*)fTracks->UncheckedAt(idx) : NULL; } -//_____________________________________________________________________________ -Int_t AliTRDtrackerV1::Freq(Int_t n, const Int_t *inlist - , Int_t *outlist, Bool_t down) -{ - // - // Sort eleements according occurancy - // The size of output array has is 2*n - // - if (n <= 0) { - return 0; - } - Int_t *sindexS = new Int_t[n]; // Temporary array for sorting - Int_t *sindexF = new Int_t[2*n]; - for (Int_t i = 0; i < n; i++) { - sindexF[i] = 0; - } - - TMath::Sort(n,inlist,sindexS,down); - - Int_t last = inlist[sindexS[0]]; - Int_t val = last; - sindexF[0] = 1; - sindexF[0+n] = last; - Int_t countPos = 0; +// //_____________________________________________________________________________ +// Int_t AliTRDtrackerV1::Freq(Int_t n, const Int_t *inlist +// , Int_t *outlist, Bool_t down) +// { +// // +// // Sort eleements according occurancy +// // The size of output array has is 2*n +// // +// +// if (n <= 0) { +// return 0; +// } +// +// Int_t *sindexS = new Int_t[n]; // Temporary array for sorting +// Int_t *sindexF = new Int_t[2*n]; +// for (Int_t i = 0; i < n; i++) { +// sindexF[i] = 0; +// } +// +// TMath::Sort(n,inlist,sindexS,down); +// +// Int_t last = inlist[sindexS[0]]; +// Int_t val = last; +// sindexF[0] = 1; +// sindexF[0+n] = last; +// Int_t countPos = 0; +// +// // Find frequency +// for (Int_t i = 1; i < n; i++) { +// val = inlist[sindexS[i]]; +// if (last == val) { +// sindexF[countPos]++; +// } +// else { +// countPos++; +// sindexF[countPos+n] = val; +// sindexF[countPos]++; +// last = val; +// } +// } +// if (last == val) { +// countPos++; +// } +// +// // Sort according frequency +// TMath::Sort(countPos,sindexF,sindexS,kTRUE); +// +// for (Int_t i = 0; i < countPos; i++) { +// outlist[2*i ] = sindexF[sindexS[i]+n]; +// outlist[2*i+1] = sindexF[sindexS[i]]; +// } +// +// delete [] sindexS; +// delete [] sindexF; +// +// return countPos; +// +// } - // Find frequency - for (Int_t i = 1; i < n; i++) { - val = inlist[sindexS[i]]; - if (last == val) { - sindexF[countPos]++; - } - else { - countPos++; - sindexF[countPos+n] = val; - sindexF[countPos]++; - last = val; - } - } - if (last == val) { - countPos++; - } - // Sort according frequency - TMath::Sort(countPos,sindexF,sindexS,kTRUE); +//____________________________________________________________________ +void AliTRDtrackerV1::ResetSeedTB() +{ +// reset buffer for seeding time bin layers. If the time bin +// layers are not allocated this function allocates them - for (Int_t i = 0; i < countPos; i++) { - outlist[2*i ] = sindexF[sindexS[i]+n]; - outlist[2*i+1] = sindexF[sindexS[i]]; + for(Int_t isl=0; islClear(); } - - delete [] sindexS; - delete [] sindexF; - - return countPos; - } -//____________________________________________________________________ - //_____________________________________________________________________________ -Float_t AliTRDtrackerV1::GetChi2Y(AliTRDseedV1 *tracklets) const +Float_t AliTRDtrackerV1::GetChi2Y(const AliTRDseedV1 * const tracklets) const { - // Chi2 definition on y-direction + // Calculates normalized chi2 in y-direction + // chi2 = Sum chi2 / n_tracklets - Float_t chi2 = 0; - for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ + Double_t chi2 = 0.; Int_t n = 0; + for(Int_t ipl = kNPlanes; ipl--;){ if(!tracklets[ipl].IsOK()) continue; - Double_t distLayer = (tracklets[ipl].GetYfit(0) - tracklets[ipl].GetYref(0));// /tracklets[ipl].GetSigmaY(); - chi2 += distLayer * distLayer; + chi2 += tracklets[ipl].GetChi2Y(); + n++; } - return chi2; + return n ? chi2/n : 0.; } -//____________________________________________________________________ -void AliTRDtrackerV1::ResetSeedTB() +//_____________________________________________________________________________ +Float_t AliTRDtrackerV1::GetChi2Z(const AliTRDseedV1 *const tracklets) const { -// reset buffer for seeding time bin layers. If the time bin -// layers are not allocated this function allocates them + // Calculates normalized chi2 in z-direction + // chi2 = Sum chi2 / n_tracklets - for(Int_t isl=0; islClear(); + Double_t chi2 = 0; Int_t n = 0; + for(Int_t ipl = kNPlanes; ipl--;){ + if(!tracklets[ipl].IsOK()) continue; + chi2 += tracklets[ipl].GetChi2Z(); + n++; } + return n ? chi2/n : 0.; } //_____________________________________________________________________________ -Float_t AliTRDtrackerV1::GetChi2Z(AliTRDseedV1 *tracklets) const +Float_t AliTRDtrackerV1::GetChi2Phi(const AliTRDseedV1 *const tracklets) const { - // Calculates normalized chi2 in z-direction + // Calculates normalized chi2 for angular resolution + // chi2 = Sum chi2 / n_tracklets - Float_t chi2 = 0; - // chi2 = Sum ((z - zmu)/sigma)^2 - // Sigma for the z direction is defined as half of the padlength - for(Int_t ipl = 0; ipl < kNPlanes; ipl++){ - if(!tracklets[ipl].IsOK()) continue; - Double_t distLayer = (tracklets[ipl].GetMeanz() - tracklets[ipl].GetZref(0)); // /(tracklets[ipl].GetPadLength()/2); - chi2 += distLayer * distLayer; + Double_t chi2 = 0; Int_t n = 0; + for (Int_t iLayer = 0; iLayer < kNPlanes; iLayer++) { + if(!tracklets[iLayer].IsOK()) continue; + chi2 += tracklets[iLayer].GetChi2Phi(); + n++; + } + 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; } +//____________________________________________________________________ +void AliTRDtrackerV1::UnsetTrackletsTrack(const AliTRDtrackV1 * const track) +{ +// Remove tracklets from tracker list attached to "track" + Int_t idx(-1); + for(Int_t il(0); ilGetTrackletIndex(il)) < 0) continue; + delete (fTracklets->RemoveAt(idx)); + } +} + + /////////////////////////////////////////////////////// // // // Resources of class AliTRDLeastSquare // @@ -3325,22 +3844,41 @@ 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; @@ -3351,12 +3889,14 @@ 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; @@ -3366,31 +3906,39 @@ 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(TMath::Abs(det)<1.e-30) 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 // @@ -3405,3 +3953,335 @@ 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()); +}