-// $Id$
+//$Id$
+
#ifndef ALIHLTGLOBALTRACKMATCHER_H
#define ALIHLTGLOBALTRACKMATCHER_H
+
+
//* This file is property of and copyright by the ALICE HLT Project *
//* ALICE Experiment at CERN, All rights reserved. *
//* See cxx source for full Copyright notice *
/** @file AliHLTGlobalTrackMatcher.h
@author Svein Lindal (svein.lindal@fys.uio.no)
@date
- @brief The HLT TPC Calorimeter cluster matcher base class
+ @brief The HLT class matching TPC tracks to calorimeter clusters
*/
-class AliPHOSGeoUtils;
-
-class TClonesArray;
-class TTreeStream;
-class TTreeSRedirector;
-class AliESDEvent;
-class AliHLTCaloClusterReader;
-struct AliHLTCaloClusterDataStruct;
-struct AliHLTCaloClusterHeaderStruct;
#include "AliHLTLogging.h"
#include "AliESDtrack.h"
+#include "TObjArray.h"
+#include "TArrayI.h"
+#include "TVector3.h"
+
+class AliHLTGlobalTrackMatcher : public AliHLTLogging{
-/**
- * @class AliHLTGlobalTrackMatcher
- * Global track merger for the barrel section.
- *
- * @ingroup alihlt_global
- * @author Jacek.Otwinowski@gsi.de
- */
-class AliHLTGlobalTrackMatcher : public AliHLTLogging {
public:
AliHLTGlobalTrackMatcher();
+
/** destructor */
virtual ~AliHLTGlobalTrackMatcher();
- // set matching parameters
- void SetParameter(Double_t maxy=1., Double_t maxz=1., Double_t maxsnp=0.05, Double_t maxtgl=0.1, Double_t signed1Pt=0.001);
-
- // match tracks
- Bool_t Match(AliESDEvent *esdEvent, AliHLTCaloClusterHeaderStruct * clusterHeaderStruct);
-
+ //Main function, loops over tracks and calls appropriate functions to establish matches
+ template <class T>
+ Int_t Match( TObjArray * trackArray, vector<T*> &phosClustersVector, vector<T*> &emcalClustersVector, Double_t bz );
+
private:
+
+ void DoInit();
- AliHLTCaloClusterReader * fClusterReader;
+ //Loops over clusters and decides if track is a good match to any of these
+ template <class T>
+ Int_t MatchTrackToClusters( AliExternalTrackParam * track, vector<T*> &clustersVector, Int_t nClusters, Float_t * bestMatch, Double_t bz);
- //PHOS Geometry
- AliPHOSGeoUtils* fPHOSGeom;
+ //Add track Id to cluster's list of matching tracks
+ Int_t AddTrackToCluster(Int_t tId, Int_t* clustersArray, Bool_t bestMatch, Int_t nMatches);
+ Int_t AddTrackToCluster(Int_t tId, TArrayI* clustersArray, Bool_t bestMatch, Int_t nMatches);
+ //Projects track to detector volume and decides if it's anywhere near calorimeter volume
+ Bool_t IsTrackCloseToDetector(AliExternalTrackParam * track, Double_t bz, Double_t fMaxX, Bool_t ySign, Double_t fMaxZ, Double_t dRadius);
- // PHOS Geometry boundaries matching parameters
- const Double_t fMaxZ; //! max Z track (cm)
- const Double_t fMaxX; //! max Y track (cm)
- const Double_t fMinX;
+ // Geometrical cut off values used to decide whether track is anywhere near calorimeter volumes
+ Float_t fPhosMaxZ; // max Z track (cm)
+ Float_t fPhosMaxX; // max X track (cm)
+ Float_t fEmcalMaxZ; // max Z track (cm)
+ Float_t fEmcalMaxX; // max X track (cm)
- const Double_t fDetRadius;
- const Double_t fMatchDistanceSq;
-
- //Angle of PHOS Modules to Y
- //Float_t fPHOSAngles[5];
- int fNModules;
+ Float_t fMatchDistance; // Square of maximum distance where track is considered a match to cluster (cm^2)
- Int_t *fBestMatchesArray;
- Float_t *fTrackDistanceArray;
+ const Double_t fPhosRadius; // Radial position of PHOS
+ const Double_t fEmcalRadius; // Radial position of EMCAL
-
AliHLTGlobalTrackMatcher(const AliHLTGlobalTrackMatcher & );
AliHLTGlobalTrackMatcher & operator = (const AliHLTGlobalTrackMatcher &);
-
- ClassDef(AliHLTGlobalTrackMatcher,1) //Merging base class
+ ClassDef(AliHLTGlobalTrackMatcher,1)
};
+
+template <class T>
+Int_t AliHLTGlobalTrackMatcher::Match( TObjArray * trackArray, vector<T*> &phosClustersVector, vector<T*> &emcalClustersVector, Double_t bz ) {
+ //See above for documentation
+
+
+ Int_t nTracks = trackArray->GetEntriesFast();
+ Int_t nPhosClusters = phosClustersVector.size();
+ Int_t nEmcalClusters = emcalClustersVector.size();
+
+
+ //HLTError("tracks phos emcal %d %d %d", nTracks, nPhosClusters, nEmcalClusters);
+
+ //See if there are tracks and clusters to match
+ if ( nTracks <= 0 ) {
+ return 0;
+ } else if ( (nEmcalClusters <= 0) && (nPhosClusters <= 0)) {
+ return 0;
+ }
+
+
+ Float_t bestMatchPhos[nPhosClusters];
+ for(int ic = 0; ic < nPhosClusters; ic++) {
+ bestMatchPhos[ic] = 999999;
+ }
+
+ Float_t bestMatchEmcal[nEmcalClusters];
+ for(int ic = 0; ic < nEmcalClusters; ic++) {
+ bestMatchEmcal[ic] = 999999;
+ }
+
+ //Loop over tracks
+ for (int it = 0; it < nTracks; it++ ) {
+ AliExternalTrackParam * track = static_cast<AliExternalTrackParam*>(trackArray->At(it));
+
+ if ( IsTrackCloseToDetector(track, bz, fPhosMaxX, kFALSE, fPhosMaxZ, fPhosRadius ) ) {
+ MatchTrackToClusters( track, phosClustersVector, nPhosClusters, bestMatchPhos, bz);
+
+ } else if ( IsTrackCloseToDetector(track, bz, fEmcalMaxX, kTRUE, fEmcalMaxZ, fEmcalRadius ) ) {
+ MatchTrackToClusters( track, emcalClustersVector, nEmcalClusters, bestMatchEmcal, bz);
+ }
+
+ }
+
+ return 0;
+}
+
+
+
+template <class T>
+Int_t AliHLTGlobalTrackMatcher::MatchTrackToClusters( AliExternalTrackParam * track, vector<T*> &clustersVector, Int_t nClusters, Float_t * bestMatch, Double_t bz) {
+
+ //See header file for documentation
+ Int_t iResult = 0;
+
+ Float_t clusterPosition[3];
+ Double_t trackPosition[3];
+
+
+ for(int ic = 0; ic < nClusters; ic++) {
+
+ T * cluster = clustersVector.at(ic);
+
+ //Get cluster global coordinates
+ cluster->GetPosition(clusterPosition);
+
+ Double_t rCluster = TMath::Sqrt(clusterPosition[0]*clusterPosition[0] + clusterPosition[1]*clusterPosition[1]);
+
+ //Rotate tracking system to the angle of the cluster
+ TVector3 cVec(clusterPosition);
+ if (! (track->Rotate(cVec.Phi())) ) {
+ continue;
+ }
+
+ if(! (track->GetXYZAt(rCluster, bz, trackPosition)) ) {
+ continue;
+ }
+
+ //Calculate track - cluster residuals
+ Double_t match = 0;
+ for(int i = 0; i < 3; i++) {
+ Double_t dd = trackPosition[i] - clusterPosition[i];
+ match += dd*dd;
+ }
+
+ if( match > fMatchDistance ) {
+ continue;
+ }
+
+ if (match < bestMatch[ic]) {
+
+ bestMatch[ic] = match;
+ cluster->SetEmcCpvDistance(TMath::Sqrt(match));
+
+ Double_t dx = trackPosition[0] - clusterPosition[0];
+ Double_t dy = trackPosition[1] - clusterPosition[1];
+ Double_t dz = trackPosition[2] - clusterPosition[2];
+ cluster->SetTrackDistance( ((dx > 0) ? 1 : -1 )*TMath::Sqrt(dx*dx + dy*dy), dz);
+ }
+
+ //Add track to cluster's array of matching tracks
+ Int_t nTracksMatched = cluster->GetNTracksMatched();
+ iResult = AddTrackToCluster(track->GetID(), cluster->GetTracksMatched(), match < bestMatch[ic], nTracksMatched);
+ }
+
+ return iResult;
+}
+
#endif
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff