/// * ValidateTracksWithTrigger to match tracker/trigger tracks
///
/// Several options and adjustable parameters are available for both KALMAN and ORIGINAL
-/// tracking algorithms. They can be changed by using:
-/// AliMUONRecoParam *muonRecoParam = AliMUONRecoParam::GetLow(High)FluxParam();
-/// muonRecoParam->Set...(); // see methods in AliMUONRecoParam.h for details
-/// AliMUONReconstructor::SetRecoParam(muonRecoParam);
+/// tracking algorithms. They can be changed through the AliMUONRecoParam object
+/// set in the reconstruction macro or read from the CDB
+/// (see methods in AliMUONRecoParam.h file for details)
///
/// Main parameters and options are:
/// - *fgkSigmaToCutForTracking* : quality cut used to select new clusters to be
#include "AliMUONVClusterServer.h"
#include "AliMUONVTriggerStore.h"
#include "AliMUONVTriggerTrackStore.h"
+#include "AliMUONRecoParam.h"
+
#include "AliMpDEManager.h"
#include "AliMpArea.h"
/// \endcond
//__________________________________________________________________________
-AliMUONVTrackReconstructor::AliMUONVTrackReconstructor(AliMUONVClusterServer& clusterServer)
- : TObject(),
- fRecTracksPtr(0x0),
- fNRecTracks(0),
- fClusterServer(clusterServer)
+AliMUONVTrackReconstructor::AliMUONVTrackReconstructor(const AliMUONRecoParam* recoParam,
+ AliMUONVClusterServer* clusterServer)
+: TObject(),
+fRecTracksPtr(0x0),
+fNRecTracks(0),
+fClusterServer(clusterServer),
+fkRecoParam(recoParam)
{
/// Constructor for class AliMUONVTrackReconstructor
+ /// WARNING: if clusterServer=0x0, no clusterization will be possible at this level
// Memory allocation for the TClonesArray of reconstructed tracks
fRecTracksPtr = new TClonesArray("AliMUONTrack", 100);
// set the magnetic field for track extrapolations
- const AliMagF* kField = AliTracker::GetFieldMap();
- if (!kField) AliFatal("No field available");
- AliMUONTrackExtrap::SetField(kField);
+ AliMUONTrackExtrap::SetField();
}
//__________________________________________________________________________
// Reset array of tracks
ResetTracks();
- // Look for candidates from at least 3 aligned points in stations(1..) 4 and 5
- MakeTrackCandidates(clusterStore);
+ // Look for candidates from clusters in stations(1..) 4 and 5 (abort in case of failure)
+ if (!MakeTrackCandidates(clusterStore)) return;
+
+ // Look for extra candidates from clusters in stations(1..) 4 and 5 (abort in case of failure)
+ if (GetRecoParam()->MakeMoreTrackCandidates()) {
+ if (!MakeMoreTrackCandidates(clusterStore)) return;
+ }
// Stop tracking if no candidate found
if (fRecTracksPtr->GetEntriesFast() == 0) return;
- // Follow tracks in stations(1..) 3, 2 and 1
- FollowTracks(clusterStore);
+ // Follow tracks in stations(1..) 3, 2 and 1 (abort in case of failure)
+ if (!FollowTracks(clusterStore)) return;
// Complement the reconstructed tracks
- if (AliMUONReconstructor::GetRecoParam()->ComplementTracks()) ComplementTracks(clusterStore);
+ if (GetRecoParam()->ComplementTracks()) {
+ if (ComplementTracks(clusterStore)) RemoveIdenticalTracks();
+ }
// Improve the reconstructed tracks
- if (AliMUONReconstructor::GetRecoParam()->ImproveTracks()) ImproveTracks();
+ if (GetRecoParam()->ImproveTracks()) ImproveTracks();
- // Remove double tracks
- RemoveDoubleTracks();
+ // Remove connected tracks
+ if (GetRecoParam()->RemoveConnectedTracksInSt12()) RemoveConnectedTracks(kFALSE);
+ else RemoveConnectedTracks(kTRUE);
// Fill AliMUONTrack data members
Finalize();
}
//__________________________________________________________________________
-TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsInStation(const AliMUONVClusterStore& clusterStore, Int_t station)
+TClonesArray* AliMUONVTrackReconstructor::MakeSegmentsBetweenChambers(const AliMUONVClusterStore& clusterStore, Int_t ch1, Int_t ch2)
{
- /// To make the list of segments in station(0..) "Station" from the list of clusters to be reconstructed.
+ /// To make the list of segments from the list of clusters in the 2 given chambers.
/// Return a new TClonesArray of segments.
/// It is the responsibility of the user to delete it afterward.
- AliDebug(1,Form("Enter MakeSegmentsPerStation (1..) %d",station+1));
+ AliDebug(1,Form("Enter MakeSegmentsBetweenChambers (1..) %d-%d", ch1+1, ch2+1));
AliMUONVCluster *cluster1, *cluster2;
AliMUONObjectPair *segment;
- Double_t bendingSlope = 0, impactParam = 0., bendingMomentum = 0.; // to avoid compilation warning
- Int_t ch1 = 2 * station;
- Int_t ch2 = ch1 + 1;
+ Double_t nonBendingSlope = 0, bendingSlope = 0, impactParam = 0., bendingMomentum = 0.; // to avoid compilation warning
// Create iterators to loop over clusters in both chambers
TIter nextInCh1(clusterStore.CreateChamberIterator(ch1,ch1));
// Loop over clusters in the second chamber of the station
while ( ( cluster2 = static_cast<AliMUONVCluster*>(nextInCh2()) ) ) {
+ // non bending slope
+ nonBendingSlope = (cluster1->GetX() - cluster2->GetX()) / (cluster1->GetZ() - cluster2->GetZ());
+
+ // check if non bending slope is within tolerances
+ if (TMath::Abs(nonBendingSlope) > GetRecoParam()->GetMaxNonBendingSlope()) continue;
+
// bending slope
bendingSlope = (cluster1->GetY() - cluster2->GetY()) / (cluster1->GetZ() - cluster2->GetZ());
- // impact parameter
- impactParam = cluster1->GetY() - cluster1->GetZ() * bendingSlope;
-
- // absolute value of bending momentum
- bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(impactParam));
-
- // check for bending momentum within tolerances
- if ((bendingMomentum < AliMUONReconstructor::GetRecoParam()->GetMaxBendingMomentum()) &&
- (bendingMomentum > AliMUONReconstructor::GetRecoParam()->GetMinBendingMomentum())) {
-
- // make new segment
- segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(cluster1, cluster2, kFALSE, kFALSE);
-
- // Printout for debug
- if (AliLog::GetGlobalDebugLevel() > 1) {
- cout << "segmentIndex(0...): " << segments->GetLast() << endl;
- segment->Dump();
- cout << "Cluster in first chamber" << endl;
- cluster1->Print();
- cout << "Cluster in second chamber" << endl;
- cluster2->Print();
- }
+ // check the bending momentum of the bending slope depending if the field is ON or OFF
+ if (AliMUONTrackExtrap::IsFieldON()) {
+
+ // impact parameter
+ impactParam = cluster1->GetY() - cluster1->GetZ() * bendingSlope;
+
+ // absolute value of bending momentum
+ bendingMomentum = TMath::Abs(AliMUONTrackExtrap::GetBendingMomentumFromImpactParam(impactParam));
+ // check if bending momentum is within tolerances
+ if (bendingMomentum < GetRecoParam()->GetMinBendingMomentum() ||
+ bendingMomentum > GetRecoParam()->GetMaxBendingMomentum()) continue;
+
+ } else {
+
+ // check if non bending slope is within tolerances
+ if (TMath::Abs(bendingSlope) > GetRecoParam()->GetMaxBendingSlope()) continue;
+
+ }
+ // make new segment
+ segment = new ((*segments)[segments->GetLast()+1]) AliMUONObjectPair(cluster1, cluster2, kFALSE, kFALSE);
+
+ // Printout for debug
+ if (AliLog::GetGlobalDebugLevel() > 1) {
+ cout << "segmentIndex(0...): " << segments->GetLast() << endl;
+ segment->Dump();
+ cout << "Cluster in first chamber" << endl;
+ cluster1->Print();
+ cout << "Cluster in second chamber" << endl;
+ cluster2->Print();
}
}
}
// Printout for debug
- AliDebug(1,Form("Station: %d NSegments: %d ", station+1, segments->GetEntriesFast()));
+ AliDebug(1,Form("chambers%d-%d: NSegments = %d ", ch1+1, ch2+1, segments->GetEntriesFast()));
return segments;
}
+ //__________________________________________________________________________
+void AliMUONVTrackReconstructor::RemoveUsedSegments(TClonesArray& segments)
+{
+ /// To remove pairs of clusters already attached to a track
+ AliDebug(1,"Enter RemoveUsedSegments");
+ Int_t nSegments = segments.GetEntriesFast();
+ Int_t nTracks = fRecTracksPtr->GetEntriesFast();
+ AliMUONObjectPair *segment;
+ AliMUONTrack *track;
+ AliMUONVCluster *cluster, *cluster1, *cluster2;
+ Bool_t foundCluster1, foundCluster2, removeSegment;
+
+ // Loop over segments
+ for (Int_t iSegment=0; iSegment<nSegments; iSegment++) {
+ segment = (AliMUONObjectPair*) segments.UncheckedAt(iSegment);
+
+ cluster1 = (AliMUONVCluster*) segment->First();
+ cluster2 = (AliMUONVCluster*) segment->Second();
+ removeSegment = kFALSE;
+
+ // Loop over tracks
+ for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
+ track = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack);
+
+ // skip empty slot
+ if (!track) continue;
+
+ foundCluster1 = kFALSE;
+ foundCluster2 = kFALSE;
+
+ // Loop over clusters
+ Int_t nClusters = track->GetNClusters();
+ for (Int_t iCluster = 0; iCluster < nClusters; iCluster++) {
+ cluster = ((AliMUONTrackParam*) track->GetTrackParamAtCluster()->UncheckedAt(iCluster))->GetClusterPtr();
+
+ // check if both clusters are in that track
+ if (cluster == cluster1) foundCluster1 = kTRUE;
+ else if (cluster == cluster2) foundCluster2 = kTRUE;
+
+ if (foundCluster1 && foundCluster2) {
+ removeSegment = kTRUE;
+ break;
+ }
+
+ }
+
+ if (removeSegment) break;
+
+ }
+
+ if (removeSegment) segments.RemoveAt(iSegment);
+
+ }
+
+ segments.Compress();
+
+ // Printout for debug
+ AliDebug(1,Form("NSegments = %d ", segments.GetEntriesFast()));
+}
+
//__________________________________________________________________________
void AliMUONVTrackReconstructor::RemoveIdenticalTracks()
{
/// To remove identical tracks:
/// Tracks are considered identical if they have all their clusters in common.
/// One keeps the track with the larger number of clusters if need be
- AliMUONTrack *track1, *track2, *trackToRemove;
+ AliMUONTrack *track1, *track2;
+ Int_t nTracks = fRecTracksPtr->GetEntriesFast();
Int_t clustersInCommon, nClusters1, nClusters2;
- Bool_t removedTrack1;
// Loop over first track of the pair
- track1 = (AliMUONTrack*) fRecTracksPtr->First();
- while (track1) {
- removedTrack1 = kFALSE;
+ for (Int_t iTrack1 = 0; iTrack1 < nTracks; iTrack1++) {
+ track1 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack1);
+ // skip empty slot
+ if (!track1) continue;
nClusters1 = track1->GetNClusters();
// Loop over second track of the pair
- track2 = (AliMUONTrack*) fRecTracksPtr->After(track1);
- while (track2) {
+ for (Int_t iTrack2 = iTrack1+1; iTrack2 < nTracks; iTrack2++) {
+ track2 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack2);
+ // skip empty slot
+ if (!track2) continue;
nClusters2 = track2->GetNClusters();
// number of clusters in common between two tracks
clustersInCommon = track1->ClustersInCommon(track2);
// decide which track to remove
if (nClusters2 > nClusters1) {
// remove track1 and continue the first loop with the track next to track1
- trackToRemove = track1;
- track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
- fRecTracksPtr->Remove(trackToRemove);
- fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
+ fRecTracksPtr->RemoveAt(iTrack1);
fNRecTracks--;
- removedTrack1 = kTRUE;
break;
} else {
// remove track2 and continue the second loop with the track next to track2
- trackToRemove = track2;
- track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
- fRecTracksPtr->Remove(trackToRemove);
- fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
+ fRecTracksPtr->RemoveAt(iTrack2);
fNRecTracks--;
}
- } else track2 = (AliMUONTrack*) fRecTracksPtr->After(track2);
+ }
} // track2
- if (removedTrack1) continue;
- track1 = (AliMUONTrack*) fRecTracksPtr->After(track1);
} // track1
- return;
+ fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
}
//__________________________________________________________________________
/// which has the smaller number of clusters are in common with the other track.
/// Among two identical tracks, one keeps the track with the larger number of clusters
/// or, if these numbers are equal, the track with the minimum chi2.
+ AliMUONTrack *track1, *track2;
+ Int_t nTracks = fRecTracksPtr->GetEntriesFast();
+ Int_t clustersInCommon2, nClusters1, nClusters2;
+ // Loop over first track of the pair
+ for (Int_t iTrack1 = 0; iTrack1 < nTracks; iTrack1++) {
+ track1 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack1);
+ // skip empty slot
+ if (!track1) continue;
+ nClusters1 = track1->GetNClusters();
+ // Loop over second track of the pair
+ for (Int_t iTrack2 = iTrack1+1; iTrack2 < nTracks; iTrack2++) {
+ track2 = (AliMUONTrack*) fRecTracksPtr->UncheckedAt(iTrack2);
+ // skip empty slot
+ if (!track2) continue;
+ nClusters2 = track2->GetNClusters();
+ // number of clusters in common between two tracks
+ clustersInCommon2 = 2 * track1->ClustersInCommon(track2);
+ // check for identical tracks
+ if (clustersInCommon2 > nClusters1 || clustersInCommon2 > nClusters2) {
+ // decide which track to remove
+ if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) {
+ // remove track2 and continue the second loop with the track next to track2
+ fRecTracksPtr->RemoveAt(iTrack2);
+ fNRecTracks--;
+ } else {
+ // else remove track1 and continue the first loop with the track next to track1
+ fRecTracksPtr->RemoveAt(iTrack1);
+ fNRecTracks--;
+ break;
+ }
+ }
+ } // track2
+ } // track1
+ fRecTracksPtr->Compress(); // this is essential to retrieve the TClonesArray afterwards
+}
+
+ //__________________________________________________________________________
+void AliMUONVTrackReconstructor::RemoveConnectedTracks(Bool_t inSt345)
+{
+ /// To remove double tracks:
+ /// Tracks are considered identical if they share 1 cluster or more.
+ /// If inSt345=kTRUE only stations 3, 4 and 5 are considered.
+ /// Among two identical tracks, one keeps the track with the larger number of clusters
+ /// or, if these numbers are equal, the track with the minimum chi2.
AliMUONTrack *track1, *track2, *trackToRemove;
Int_t clustersInCommon, nClusters1, nClusters2;
Bool_t removedTrack1;
while (track2) {
nClusters2 = track2->GetNClusters();
// number of clusters in common between two tracks
- clustersInCommon = track1->ClustersInCommon(track2);
+ if (inSt345) clustersInCommon = track1->ClustersInCommonInSt345(track2);
+ else clustersInCommon = track1->ClustersInCommon(track2);
// check for identical tracks
- if (((nClusters1 < nClusters2) && (2 * clustersInCommon > nClusters1)) || (2 * clustersInCommon > nClusters2)) {
+ if (clustersInCommon > 0) {
// decide which track to remove
if ((nClusters1 > nClusters2) || ((nClusters1 == nClusters2) && (track1->GetGlobalChi2() <= track2->GetGlobalChi2()))) {
// remove track2 and continue the second loop with the track next to track2
}
//__________________________________________________________________________
-void AliMUONVTrackReconstructor::AskForNewClustersInStation(const AliMUONTrackParam &trackParam,
- AliMUONVClusterStore& clusterStore, Int_t station)
+void AliMUONVTrackReconstructor::AskForNewClustersInChamber(const AliMUONTrackParam &trackParam,
+ AliMUONVClusterStore& clusterStore, Int_t chamber)
{
/// Ask the clustering to reconstruct new clusters around the track candidate position
- /// in the 2 chambers of the given station
- // maximum shift of the searching area due to distance between detection elements and the track slope
- static const Double_t kgMaxShift = 2.; // 2 cm
+ // check if the current chamber is useable
+ if (!fClusterServer || !GetRecoParam()->UseChamber(chamber)) return;
- // extrapolate track parameters to the second chamber of the station
- AliMUONTrackParam extrapTrackParam(trackParam);
- AliMUONTrackExtrap::ExtrapToZ(&extrapTrackParam, AliMUONConstants::DefaultChamberZ(2*station+1));
+ // maximum distance between the center of the chamber and a detection element
+ // (accounting for the inclination of the chamber)
+ static const Double_t kMaxDZ = 15.; // 15 cm
- // build the searching area
- TVector2 position(extrapTrackParam.GetNonBendingCoor(), extrapTrackParam.GetBendingCoor());
- TVector2 dimensions(AliMUONReconstructor::GetRecoParam()->GetMaxNonBendingDistanceToTrack() + kgMaxShift,
- AliMUONReconstructor::GetRecoParam()->GetMaxBendingDistanceToTrack() + kgMaxShift);
- AliMpArea area2(position, dimensions);
+ // extrapolate track parameters to the chamber
+ AliMUONTrackParam extrapTrackParam(trackParam);
+ AliMUONTrackExtrap::ExtrapToZCov(&extrapTrackParam, AliMUONConstants::DefaultChamberZ(chamber));
+
+ // build the searching area using the track resolution and the maximum-distance-to-track value
+ const TMatrixD& kParamCov = extrapTrackParam.GetCovariances();
+ Double_t errX2 = kParamCov(0,0) + kMaxDZ * kMaxDZ * kParamCov(1,1) + 2. * kMaxDZ * TMath::Abs(kParamCov(0,1));
+ Double_t errY2 = kParamCov(2,2) + kMaxDZ * kMaxDZ * kParamCov(3,3) + 2. * kMaxDZ * TMath::Abs(kParamCov(2,3));
+ Double_t dX = TMath::Abs(trackParam.GetNonBendingSlope()) * kMaxDZ +
+ GetRecoParam()->GetMaxNonBendingDistanceToTrack() +
+ GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(errX2);
+ Double_t dY = TMath::Abs(trackParam.GetBendingSlope()) * kMaxDZ +
+ GetRecoParam()->GetMaxBendingDistanceToTrack() +
+ GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(errY2);
+ AliMpArea area(extrapTrackParam.GetNonBendingCoor(),
+ extrapTrackParam.GetBendingCoor(),
+ dX, dY);
// ask to cluterize in the given area of the given chamber
- fClusterServer.Clusterize(2*station+1, clusterStore, area2);
+ fClusterServer->Clusterize(chamber, clusterStore, area, GetRecoParam());
- // extrapolate track parameters to the first chamber of the station
- AliMUONTrackExtrap::ExtrapToZ(&extrapTrackParam, AliMUONConstants::DefaultChamberZ(2*station));
-
- // build the searching area
- position.Set(extrapTrackParam.GetNonBendingCoor(), extrapTrackParam.GetBendingCoor());
- AliMpArea area1(position, dimensions);
-
- // ask to cluterize in the given area of the given chamber
- fClusterServer.Clusterize(2*station, clusterStore, area1);
+}
+
+ //__________________________________________________________________________
+void AliMUONVTrackReconstructor::AskForNewClustersInStation(const AliMUONTrackParam &trackParam,
+ AliMUONVClusterStore& clusterStore, Int_t station)
+{
+ /// Ask the clustering to reconstruct new clusters around the track candidate position
+ /// in the 2 chambers of the given station
+ AskForNewClustersInChamber(trackParam, clusterStore, 2*station+1);
+ AskForNewClustersInChamber(trackParam, clusterStore, 2*station);
}
//__________________________________________________________________________
}
//__________________________________________________________________________
-Bool_t AliMUONVTrackReconstructor::TryOneClusterFast(const AliMUONTrackParam &trackParam, AliMUONVCluster* cluster)
+Bool_t AliMUONVTrackReconstructor::TryOneClusterFast(const AliMUONTrackParam &trackParam, const AliMUONVCluster* cluster)
{
-/// Test the compatibility between the track and the cluster within a wide fix window
-/// assuming linear propagation of the track:
+/// Test the compatibility between the track and the cluster
+/// given the track resolution + the maximum-distance-to-track value
+/// and assuming linear propagation of the track:
/// return kTRUE if they are compatibles
Double_t dZ = cluster->GetZ() - trackParam.GetZ();
Double_t dX = cluster->GetX() - (trackParam.GetNonBendingCoor() + trackParam.GetNonBendingSlope() * dZ);
Double_t dY = cluster->GetY() - (trackParam.GetBendingCoor() + trackParam.GetBendingSlope() * dZ);
+ const TMatrixD& kParamCov = trackParam.GetCovariances();
+ Double_t errX2 = kParamCov(0,0) + dZ * dZ * kParamCov(1,1) + 2. * dZ * kParamCov(0,1);
+ Double_t errY2 = kParamCov(2,2) + dZ * dZ * kParamCov(3,3) + 2. * dZ * kParamCov(2,3);
+
+ Double_t dXmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(errX2) +
+ GetRecoParam()->GetMaxNonBendingDistanceToTrack();
+ Double_t dYmax = GetRecoParam()->GetSigmaCutForTracking() * TMath::Sqrt(errY2) +
+ GetRecoParam()->GetMaxBendingDistanceToTrack();
- if (TMath::Abs(dX) > AliMUONReconstructor::GetRecoParam()->GetMaxNonBendingDistanceToTrack() ||
- TMath::Abs(dY) > AliMUONReconstructor::GetRecoParam()->GetMaxBendingDistanceToTrack()) return kFALSE;
+ if (TMath::Abs(dX) > dXmax || TMath::Abs(dY) > dYmax) return kFALSE;
return kTRUE;
}
//__________________________________________________________________________
+Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInChamber(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore,
+ Int_t nextChamber)
+{
+ /// Follow trackCandidate in chamber(0..) nextChamber assuming linear propagation, and search for compatible cluster(s)
+ /// Keep all possibilities or only the best one(s) according to the flag fgkTrackAllTracks:
+ /// kTRUE: duplicate "trackCandidate" if there are several possibilities and add the new tracks at the end of
+ /// fRecTracksPtr to avoid conficts with other track candidates at this current stage of the tracking procedure.
+ /// Remove the obsolete "trackCandidate" at the end.
+ /// kFALSE: add only the best cluster(s) to the "trackCandidate". Try to add a couple of clusters in priority.
+ /// return kTRUE if new cluster(s) have been found (otherwise return kFALSE)
+ AliDebug(1,Form("Enter FollowLinearTrackInChamber(1..) %d", nextChamber+1));
+
+ Double_t chi2WithOneCluster = 1.e10;
+ Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() *
+ GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2
+ Double_t bestChi2WithOneCluster = maxChi2WithOneCluster;
+ Bool_t foundOneCluster = kFALSE;
+ AliMUONTrack *newTrack = 0x0;
+ AliMUONVCluster *cluster;
+ AliMUONTrackParam trackParam;
+ AliMUONTrackParam extrapTrackParamAtCluster;
+ AliMUONTrackParam bestTrackParamAtCluster;
+
+ // Get track parameters according to the propagation direction
+ if (nextChamber > 7) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last();
+ else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First();
+
+ // Printout for debuging
+ if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) {
+ cout<<endl<<"Track parameters and covariances at first cluster:"<<endl;
+ trackParam.GetParameters().Print();
+ trackParam.GetCovariances().Print();
+ }
+
+ // Add MCS effect
+ AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
+
+ // Printout for debuging
+ if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
+ cout << "FollowLinearTrackInChamber: look for cluster in chamber(1..): " << nextChamber+1 << endl;
+ }
+
+ // Create iterators to loop over clusters in chamber
+ TIter next(clusterStore.CreateChamberIterator(nextChamber,nextChamber));
+
+ // look for candidates in chamber
+ while ( ( cluster = static_cast<AliMUONVCluster*>(next()) ) ) {
+
+ // try to add the current cluster fast
+ if (!TryOneClusterFast(trackParam, cluster)) continue;
+
+ // try to add the current cluster accuratly
+ extrapTrackParamAtCluster = trackParam;
+ AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtCluster, cluster->GetZ());
+ chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster, cluster, extrapTrackParamAtCluster);
+
+ // if good chi2 then consider to add cluster
+ if (chi2WithOneCluster < maxChi2WithOneCluster) {
+ foundOneCluster = kTRUE;
+
+ // Printout for debuging
+ if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
+ cout << "FollowLinearTrackInChamber: found one cluster in chamber(1..): " << nextChamber+1
+ << " (Chi2 = " << chi2WithOneCluster << ")" << endl;
+ cluster->Print();
+ }
+
+ if (GetRecoParam()->TrackAllTracks()) {
+ // copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster
+ newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
+ if (GetRecoParam()->RequestStation(nextChamber/2))
+ extrapTrackParamAtCluster.SetRemovable(kFALSE);
+ else extrapTrackParamAtCluster.SetRemovable(kTRUE);
+ newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster,*cluster);
+ newTrack->SetGlobalChi2(trackCandidate.GetGlobalChi2()+chi2WithOneCluster);
+ fNRecTracks++;
+
+ // Printout for debuging
+ if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
+ cout << "FollowLinearTrackInChamber: added one cluster in chamber(1..): " << nextChamber+1 << endl;
+ if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
+ }
+
+ } else if (chi2WithOneCluster < bestChi2WithOneCluster) {
+ // keep track of the best cluster
+ bestChi2WithOneCluster = chi2WithOneCluster;
+ bestTrackParamAtCluster = extrapTrackParamAtCluster;
+ }
+
+ }
+
+ }
+
+ // fill out the best track if required else clean up the fRecTracksPtr array
+ if (!GetRecoParam()->TrackAllTracks()) {
+ if (foundOneCluster) {
+ if (GetRecoParam()->RequestStation(nextChamber/2))
+ bestTrackParamAtCluster.SetRemovable(kFALSE);
+ else bestTrackParamAtCluster.SetRemovable(kTRUE);
+ trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster,*(bestTrackParamAtCluster.GetClusterPtr()));
+ trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithOneCluster);
+
+ // Printout for debuging
+ if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
+ cout << "FollowLinearTrackInChamber: added the best cluster in chamber(1..): " << bestTrackParamAtCluster.GetClusterPtr()->GetChamberId()+1 << endl;
+ if (AliLog::GetGlobalDebugLevel() >= 3) newTrack->RecursiveDump();
+ }
+
+ } else return kFALSE;
+
+ } else if (foundOneCluster) {
+
+ // remove obsolete track
+ fRecTracksPtr->Remove(&trackCandidate);
+ fNRecTracks--;
+
+ } else return kFALSE;
+
+ return kTRUE;
+
+}
+
+//__________________________________________________________________________
Bool_t AliMUONVTrackReconstructor::FollowLinearTrackInStation(AliMUONTrack &trackCandidate, const AliMUONVClusterStore& clusterStore,
Int_t nextStation)
{
Double_t chi2WithOneCluster = 1.e10;
Double_t chi2WithTwoClusters = 1.e10;
- Double_t maxChi2WithOneCluster = 2. * AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking() *
- AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2
- Double_t maxChi2WithTwoClusters = 4. * AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking() *
- AliMUONReconstructor::GetRecoParam()->GetSigmaCutForTracking(); // 4 because 4 quantities in chi2
+ Double_t maxChi2WithOneCluster = 2. * GetRecoParam()->GetSigmaCutForTracking() *
+ GetRecoParam()->GetSigmaCutForTracking(); // 2 because 2 quantities in chi2
+ Double_t maxChi2WithTwoClusters = 4. * GetRecoParam()->GetSigmaCutForTracking() *
+ GetRecoParam()->GetSigmaCutForTracking(); // 4 because 4 quantities in chi2
Double_t bestChi2WithOneCluster = maxChi2WithOneCluster;
Double_t bestChi2WithTwoClusters = maxChi2WithTwoClusters;
Bool_t foundOneCluster = kFALSE;
if (nextStation==4) trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->Last();
else trackParam = *(AliMUONTrackParam*)trackCandidate.GetTrackParamAtCluster()->First();
+ // Printout for debuging
+ if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 2) || (AliLog::GetGlobalDebugLevel() >= 2)) {
+ cout<<endl<<"Track parameters and covariances at first cluster:"<<endl;
+ trackParam.GetParameters().Print();
+ trackParam.GetCovariances().Print();
+ }
+
// Add MCS effect
AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch2+1
<< " (Chi2 = " << chi2WithOneCluster << ")" << endl;
+ clusterCh2->Print();
cout << " look for second clusters in chamber(1..): " << ch1+1 << " ..." << endl;
}
// Printout for debuging
if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1
- << " (Chi2 = " << chi2WithTwoClusters << ")" << endl;
+ << " (Chi2 = " << chi2WithTwoClusters << ")" << endl;
+ clusterCh1->Print();
}
- if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) {
+ if (GetRecoParam()->TrackAllTracks()) {
// copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new clusters
newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
extrapTrackParamAtCluster1.SetRemovable(kTRUE);
newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1);
extrapTrackParamAtCluster2.SetRemovable(kTRUE);
newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2);
+ newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithTwoClusters);
fNRecTracks++;
// Tag clusterCh1 as used
if (!foundSecondCluster) {
foundOneCluster = kTRUE;
- if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) {
+ if (GetRecoParam()->TrackAllTracks()) {
// copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster
newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
- extrapTrackParamAtCluster2.SetRemovable(kFALSE);
+ if (GetRecoParam()->RequestStation(nextStation))
+ extrapTrackParamAtCluster2.SetRemovable(kFALSE);
+ else extrapTrackParamAtCluster2.SetRemovable(kTRUE);
newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster2,*clusterCh2);
+ newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithOneCluster);
fNRecTracks++;
// Printout for debuging
// look for candidates in chamber 1 not already attached to a track
// if we want to keep all possible tracks or if no good couple of clusters has been found
- if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks() || !foundTwoClusters) {
+ if (GetRecoParam()->TrackAllTracks() || !foundTwoClusters) {
// Printout for debuging
if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
// add MCS effect for next step
AliMUONTrackExtrap::AddMCSEffect(&trackParam,AliMUONConstants::ChamberThicknessInX0(),1.);
-
+
// reset cluster iterator of chamber 1
nextInCh1.Reset();
iCluster1 = -1;
// try to add the current cluster fast
if (!TryOneClusterFast(trackParam, clusterCh1)) continue;
-
+
// try to add the current cluster accuratly
extrapTrackParamAtCluster1 = trackParam;
AliMUONTrackExtrap::LinearExtrapToZ(&extrapTrackParamAtCluster1, clusterCh1->GetZ());
chi2WithOneCluster = TryOneCluster(extrapTrackParamAtCluster1, clusterCh1, extrapTrackParamAtCluster1);
-
+
// if good chi2 then consider to add clusterCh1
// We do not try to attach a cluster in the other chamber too since it has already been done above
if (chi2WithOneCluster < maxChi2WithOneCluster) {
if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
cout << "FollowLinearTrackInStation: found one cluster in chamber(1..): " << ch1+1
<< " (Chi2 = " << chi2WithOneCluster << ")" << endl;
+ clusterCh1->Print();
}
- if (AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) {
+ if (GetRecoParam()->TrackAllTracks()) {
// copy trackCandidate into a new track put at the end of fRecTracksPtr and add the new cluster
newTrack = new ((*fRecTracksPtr)[fRecTracksPtr->GetLast()+1]) AliMUONTrack(trackCandidate);
- extrapTrackParamAtCluster1.SetRemovable(kFALSE);
+ if (GetRecoParam()->RequestStation(nextStation))
+ extrapTrackParamAtCluster1.SetRemovable(kFALSE);
+ else extrapTrackParamAtCluster1.SetRemovable(kTRUE);
newTrack->AddTrackParamAtCluster(extrapTrackParamAtCluster1,*clusterCh1);
+ newTrack->SetGlobalChi2(newTrack->GetGlobalChi2()+chi2WithOneCluster);
fNRecTracks++;
// Printout for debuging
}
// fill out the best track if required else clean up the fRecTracksPtr array
- if (!AliMUONReconstructor::GetRecoParam()->TrackAllTracks()) {
+ if (!GetRecoParam()->TrackAllTracks()) {
if (foundTwoClusters) {
bestTrackParamAtCluster1.SetRemovable(kTRUE);
trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr()));
bestTrackParamAtCluster2.SetRemovable(kTRUE);
trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster2,*(bestTrackParamAtCluster2.GetClusterPtr()));
+ trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithTwoClusters);
// Printout for debuging
if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
}
} else if (foundOneCluster) {
- bestTrackParamAtCluster1.SetRemovable(kFALSE);
+ if (GetRecoParam()->RequestStation(nextStation))
+ bestTrackParamAtCluster1.SetRemovable(kFALSE);
+ else bestTrackParamAtCluster1.SetRemovable(kTRUE);
trackCandidate.AddTrackParamAtCluster(bestTrackParamAtCluster1,*(bestTrackParamAtCluster1.GetClusterPtr()));
+ trackCandidate.SetGlobalChi2(trackCandidate.GetGlobalChi2()+bestChi2WithOneCluster);
// Printout for debuging
if ((AliLog::GetDebugLevel("MUON","AliMUONVTrackReconstructor") >= 1) || (AliLog::GetGlobalDebugLevel() >= 1)) {
AliMUONTrack *track, *nextTrack;
- // Remove double track to improve only "good" tracks
- RemoveDoubleTracks();
-
track = (AliMUONTrack*) fRecTracksPtr->First();
while (track) {
void AliMUONVTrackReconstructor::Finalize()
{
/// Recompute track parameters and covariances at each attached cluster from those at the first one
+ /// Set the label pointing to the corresponding MC track
AliMUONTrack *track;
FinalizeTrack(*track);
+ track->FindMCLabel();
+
track = (AliMUONTrack*) fRecTracksPtr->After(track);
}
while ( ( locTrg = static_cast<AliMUONLocalTrigger*>(next()) ) )
{
- Bool_t xTrig=kFALSE;
- Bool_t yTrig=kFALSE;
+ Bool_t xTrig=locTrg->IsTrigX();
+ Bool_t yTrig=locTrg->IsTrigY();
Int_t localBoardId = locTrg->LoCircuit();
- if ( locTrg->LoSdev()==1 && locTrg->LoDev()==0 &&
- locTrg->LoStripX()==0) xTrig=kFALSE; // no trigger in X
- else xTrig=kTRUE; // trigger in X
- if (locTrg->LoTrigY()==1 &&
- locTrg->LoStripY()==15 ) yTrig = kFALSE; // no trigger in Y
- else yTrig = kTRUE; // trigger in Y
if (xTrig && yTrig)
{ // make Trigger Track if trigger in X and Y
Float_t y11 = circuit.GetY11Pos(localBoardId, locTrg->LoStripX());
// need first to convert deviation to [0-30]
// (see AliMUONLocalTriggerBoard::LocalTrigger)
- Int_t deviation = locTrg->LoDev();
- Int_t sign = 0;
- if ( !locTrg->LoSdev() && deviation ) sign=-1;
- if ( !locTrg->LoSdev() && !deviation ) sign= 0;
- if ( locTrg->LoSdev() == 1 ) sign=+1;
- deviation *= sign;
- deviation += 15;
+ Int_t deviation = locTrg->GetDeviation();
Int_t stripX21 = locTrg->LoStripX()+deviation+1;
Float_t y21 = circuit.GetY21Pos(localBoardId, stripX21);
Float_t x11 = circuit.GetX11Pos(localBoardId, locTrg->LoStripY());
Float_t thetax = TMath::ATan2( x11 , z11 );
Float_t thetay = TMath::ATan2( (y21-y11) , (z21-z11) );
+
+ CorrectThetaRange(thetax);
+ CorrectThetaRange(thetay);
triggerTrack.SetX11(x11);
triggerTrack.SetY11(y11);
} // end of loop on Local Trigger
}
+//__________________________________________________________________________
+void AliMUONVTrackReconstructor::CorrectThetaRange(Float_t& theta)
+{
+ /// The angles of the trigger tracks, obtained with ATan2,
+ /// have values around +pi and -pi. On the contrary, the angles
+ /// used in the tracker tracks have values around 0.
+ /// This function sets the same range for the trigger tracks angles.
+ if (theta < -TMath::PiOver2()) theta += TMath::Pi();
+ else if(theta > TMath::PiOver2()) theta -= TMath::Pi();
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff