/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
* See cxx source for full Copyright notice */
-////////////////////////////////////////////////////////////////////////////////
-// //
-// The TRD tracker //
-// //
-////////////////////////////////////////////////////////////////////////////////
+/* $Id$ */
-#include <TNamed.h>
-#include <TH1.h>
+////////////////////////////////////////////////////////////////////////////
+// //
+// The TRD tracker //
+// //
+////////////////////////////////////////////////////////////////////////////
+
+#include "AliTracker.h"
+#include "TObjArray.h"
class TFile;
+class TTree;
class TParticle;
class TParticlePDG;
-class TObjArray;
class AliTRDgeometry;
class AliTRDtrack;
-class AliTRDmcTrack;
-class AliTRDtrackingSector;
+class AliTRDtracklet;
+class AliTRDcluster;
+class AliTRDseed;
+class AliESD;
+class TTreeSRedirector;
+
+///////////////////////////////////////////////////////////////////////////////
+// //
+// The standard TRD tracker //
+// Based on Kalman filltering approach //
+// //
+///////////////////////////////////////////////////////////////////////////////
-class AliTRDtracker : public TNamed {
+class AliTRDtracker : public AliTracker {
public:
+ enum { kMaxLayersPerSector = 1000
+ , kMaxTimeBinIndex = 216
+ , kMaxClusterPerTimeBin = 2300
+ , kZones = 5
+ , kTrackingSectors = 18 };
+
AliTRDtracker();
- AliTRDtracker(const Text_t* name, const Text_t* title);
- virtual ~AliTRDtracker();
-
- virtual void Clusters2Tracks(TH1F *hs, TH1F *hd);
- Double_t ExpectedSigmaY2(Double_t r, Double_t tgl, Double_t pt) const;
- Double_t ExpectedSigmaZ2(Double_t r, Double_t tgl) const;
- Int_t FindProlongation(AliTRDtrack& t, AliTRDtrackingSector *sec,
- Int_t s, Int_t rf=0, Int_t matched_index = -1,
- TH1F *hs=0, TH1F *hd=0);
- void GetEvent(const Char_t *hitfile, const Char_t *clusterfile);
- void SetUpSectors(AliTRDtrackingSector *sec);
- virtual void MakeSeeds(Int_t inner, Int_t outer, AliTRDtrackingSector *sec,
- Int_t turn, TH1F *hs, TH1F *hd);
- virtual void FindTracks(AliTRDtrackingSector *sec, TH1F *hs, TH1F *hd);
- virtual void UseClusters(AliTRDtrack t);
- virtual Int_t GetTrackLabel(AliTRDtrack t);
- Int_t WriteTracks(const Char_t *filename);
- void ReadClusters(TObjArray *array, const Char_t *filename);
-
- Float_t GetSeedGap() const {return fgkSeedGap;}
- Float_t GetSeedStep() const {return fgkSeedStep;}
- Float_t GetSeedDepth() const {return fgkSeedDepth;}
- Float_t GetSkipDepth() const {return fgkSkipDepth;}
- Double_t GetMaxChi2() const {return fgkMaxChi2;}
- Float_t GetMaxSeedC() const {return fgkMaxSeedC;}
- Float_t GetMaxSeedTan() const {return fgkMaxSeedTan;}
- Double_t GetSeedErrorSY() const {return fgkSeedErrorSY;}
- Double_t GetSeedErrorSY3() const {return fgkSeedErrorSY3;}
- Double_t GetSeedErrorSZ() const {return fgkSeedErrorSZ;}
- Float_t GetLabelFraction() const {return fgkLabelFraction;}
- Float_t GetWideRoad() const {return fgkWideRoad;}
-
- Float_t GetMinClustersInTrack() const {return fgkMinClustersInTrack;}
- Float_t GetMinClustersInSeed() const {return fgkMinClustersInSeed;}
- Float_t GetMaxSeedDeltaZ() const {return fgkMaxSeedDeltaZ;}
- Float_t GetMaxSeedVertexZ() const {return fgkMaxSeedVertexZ;}
-
- void SetSY2corr(Float_t w) {fSY2corr = w;}
+ AliTRDtracker(const AliTRDtracker &t);
+ AliTRDtracker(const TFile *in);
+ virtual ~AliTRDtracker();
+ AliTRDtracker &operator=(const AliTRDtracker &/*t*/) { return *this; }
+
+ void SetAddTRDseeds() { fAddTRDseeds = kTRUE; }
+ void SetNoTilt() { fNoTilt = kTRUE; }
+
+ Int_t GetTimeBinsPerPlane() const { return fTimeBinsPerPlane; }
+ Double_t GetMaxChi2() const { return fgkMaxChi2; }
+ Float_t GetLabelFraction() const { return fgkLabelFraction; }
+ Float_t GetMinClustersInTrack() const { return fgkMinClustersInTrack; }
+ Int_t GetLastPlane(AliTRDtrack *track);
+ Double_t GetTiltFactor(const AliTRDcluster *c);
+ Bool_t GetTrackPoint(Int_t index, AliTrackPoint& p) const;
+ Double_t GetX(Int_t sec, Int_t plane, Int_t localTB) const;
+ Double_t GetX(Int_t sec, Int_t pl) const { return fTrSec[sec]->GetLayer(pl)->GetX(); }
+ Int_t GetGlobalTimeBin(Int_t sec, Int_t plane, Int_t localTB) const
+ { return fTrSec[sec]->CookTimeBinIndex(plane,localTB); }
+ Double_t GetLayerNumber(Int_t sec, Double_t x) const
+ { return fTrSec[sec]->GetLayerNumber(x); }
+ AliCluster *GetCluster(Int_t index) const { if (index >= fNclusters) return NULL;
+ return (AliCluster *) fClusters->UncheckedAt(index); }
+
+ static Int_t Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down);
+ Int_t Clusters2Tracks(AliESD *event);
+ Int_t PropagateBack(AliESD *event);
+ Int_t RefitInward(AliESD *event);
+
+ virtual void CookLabel(AliKalmanTrack *t, Float_t wrong) const;
+ Int_t CookSectorIndex(Int_t gs) const { return kTrackingSectors - 1 - gs; }
+
+ Int_t LocalToGlobalID(Int_t lid);
+ Int_t GlobalToLocalID(Int_t gid);
+ Bool_t Transform(AliTRDcluster *cluster);
+
+ Int_t LoadClusters(TTree *cTree);
+ void UnloadClusters();
+ virtual void UseClusters(const AliKalmanTrack *t, Int_t from = 0) const;
+ Int_t ReadClusters(TObjArray *array, TTree *in) const;
+ AliTRDcluster *GetCluster(AliTRDtrack *track, Int_t plane, Int_t timebin, UInt_t &index);
+ Int_t FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack *track
+ , Int_t *clusters, AliTRDtracklet &tracklet);
protected:
- Int_t fEvent; // Event number
+ class AliTRDpropagationLayer {
+
+ public:
+
+ AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
+ , Double_t x0, Int_t tbIndex, Int_t plane);
+ AliTRDpropagationLayer(const AliTRDpropagationLayer &/*p*/);
+ ~AliTRDpropagationLayer() { if (fTimeBinIndex >= 0) {
+ delete[] fClusters;
+ delete[] fIndex;
+ } }
+ AliTRDpropagationLayer &operator=(const AliTRDpropagationLayer &/*p*/)
+ { return *this; }
+ operator Int_t() const { return fN; }
+ AliTRDcluster *operator[](Int_t i) { return fClusters[i]; }
+
+ void SetZmax(Int_t cham, Double_t center, Double_t w) { fZc[cham] = center;
+ fZmax[cham] = w; }
+ void SetZ(Double_t* center, Double_t *w, Double_t *wsensitive);
+ void SetHoles(Bool_t* holes);
+ void SetYmax(Double_t w, Double_t wsensitive) { fYmax = w;
+ fYmaxSensitive = wsensitive; }
+
+ void SetHole(Double_t Zmax, Double_t Ymax
+ , Double_t rho = 1.29e-3, Double_t x0 = 36.66
+ , Double_t Yc = 0.0, Double_t Zc = 0.0);
+
+ Double_t GetYmax() const { return fYmax; }
+ Double_t GetZmax(Int_t c) const { return fZmax[c]; }
+ Double_t GetZc(Int_t c) const { return fZc[c]; }
+ UInt_t GetIndex(Int_t i) const { return fIndex[i]; }
+ Double_t GetX() const { return fX; }
+ Double_t GetdX() const { return fdX; }
+ Int_t GetTimeBinIndex() const { return fTimeBinIndex; }
+ Int_t GetPlane() const { return fPlane; }
+ Bool_t IsHole(Int_t zone) const { return fIsHole[zone]; }
+ Bool_t IsSensitive() const { return (fTimeBinIndex >= 0)
+ ? kTRUE
+ : kFALSE; }
+ void Clear() { for (Int_t i = 0; i < fN; i++)
+ fClusters[i] = NULL;
+ fN = 0; }
+
+ void InsertCluster(AliTRDcluster *c, UInt_t index);
+ Int_t Find(Float_t y) const;
+ Int_t FindNearestCluster(Float_t y, Float_t z, Float_t maxroad, Float_t maxroadz) const;
+
+ private:
+
+ Int_t fN; // This is fN
+ Int_t fSec; // Sector mumber
+ AliTRDcluster **fClusters; // Array of pointers to clusters
+ UInt_t *fIndex; // Array of cluster indexes
+ Double_t fX; // X coordinate of the middle plane
+ Double_t fdX; // Radial thickness of the time bin
+ Double_t fRho; // Default density of the material
+ Double_t fX0; // Default radiation length
+ Int_t fTimeBinIndex; // Plane * F(local_tb)
+ Int_t fPlane; // Plane number
+ Double_t fZc[kZones]; // Z position of the center for 5 active areas
+ Double_t fZmax[kZones]; // Half of active area length in Z
+ Double_t fZmaxSensitive[kZones]; // Sensitive area for detection Z
+ Bool_t fIsHole[kZones]; // Is hole in given sector
+ Double_t fYmax; // Half of active area length in Y
+ Double_t fYmaxSensitive; // Half of active area length in Y
+
+ Bool_t fHole; // kTRUE if there is a hole in the layer
+ Double_t fHoleZc; // Z of the center of the hole
+ Double_t fHoleZmax; // Half of the hole length in Z
+ Double_t fHoleYc; // Y of the center of the hole
+ Double_t fHoleYmax; // Half of the hole length in Y
+ Double_t fHoleRho; // Density of the gas in the hole
+ Double_t fHoleX0; // Radiation length of the gas in the hole
+
+ };
+
+ class AliTRDtrackingSector {
+
+ public:
+
+ AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs);
+ AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/);
+ ~AliTRDtrackingSector() { for (Int_t i = 0; i < fN; i++)
+ delete fLayers[i]; }
+
+ AliTRDtrackingSector &operator=(const AliTRDtrackingSector &/*t*/){ return *this; }
+
+ Int_t GetNumberOfLayers() const { return fN; }
+ Int_t GetNumberOfTimeBins() const;
+ Int_t GetLayerNumber(Double_t x) const;
+ Int_t GetInnerTimeBin() const;
+ Int_t GetOuterTimeBin() const;
+ Int_t GetLayerNumber(Int_t tb) const { return fTimeBinIndex[tb]; }
+ Double_t GetX(Int_t pl) const { return fLayers[pl]->GetX(); }
+ AliTRDpropagationLayer* GetLayer(Int_t i) { return fLayers[i]; }
+
+ void MapTimeBinLayers();
+ Int_t Find(Double_t x) const;
+ void InsertLayer(AliTRDpropagationLayer *pl);
+ Int_t CookTimeBinIndex(Int_t plane, Int_t localTB) const;
+
+ private:
+
+ Int_t fN; // Total number of layers
+ AliTRDgeometry *fGeom; // Geometry
+ AliTRDpropagationLayer *fLayers[kMaxLayersPerSector]; // Layers
+ Int_t fTimeBinIndex[kMaxTimeBinIndex]; // Time bin index
+ Int_t fGeomSector; // Sector# in AliTRDgeometry
+
+ };
+
+ AliTRDgeometry *fGeom; // Pointer to TRD geometry
+ AliTRDtrackingSector *fTrSec[kTrackingSectors]; // Array of tracking sectors;
+ Int_t fNclusters; // Number of clusters in TRD
+ TObjArray *fClusters; // List of clusters for all sectors
+ Int_t fNseeds; // Number of track seeds
+ TObjArray *fSeeds; // List of track seeds
+ Int_t fNtracks; // Number of reconstructed tracks
+ TObjArray *fTracks; // List of reconstructed tracks
+ Int_t fTimeBinsPerPlane; // Timebins per plane in track prolongation
+
+ static const Double_t fgkMaxChi2; // Max increment in track chi2
+ static const Float_t fgkMinClustersInTrack; // Min number of clusters in track
+ static const Float_t fgkLabelFraction; // Min fraction of same label
+ static const Double_t fgkMaxSnp; // Maximal snp for tracking
+ static const Double_t fgkMaxStep; // Maximal step for tracking
+
+ Bool_t fAddTRDseeds; // Something else
+ Bool_t fNoTilt; // No tilt, or what?
+ Bool_t fHoles[5][18]; // Holes
+
+ Bool_t AdjustSector(AliTRDtrack *track);
- AliTRDgeometry *fGeom; // Pointer to TRD geometry
+ private:
- Int_t fNclusters; // Number of clusters in TRD
- TObjArray *fClusters; // List of clusters for all sectors
+ AliTRDtrack *RegisterSeed(AliTRDseed *seeds, Double_t *params);
+ void MakeSeedsMI(Int_t inner, Int_t outer, AliESD *esd = 0);
- Int_t fNseeds; // Number of track seeds
- TObjArray *fSeeds; // List of track seeds
-
- Int_t fNtracks; // Number of reconstructed tracks
- TObjArray *fTracks; // List of reconstructed tracks
+ Int_t FollowBackProlongation(AliTRDtrack &t);
+ Int_t FollowProlongation(AliTRDtrack &t);
+ void CookdEdxTimBin(AliTRDtrack &t);
+ Int_t PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep);
+ Double_t ExpectedSigmaY2(Double_t r, Double_t tgl, Double_t pt) const;
+ Double_t ExpectedSigmaZ2(Double_t r, Double_t tgl) const;
- Float_t fSY2corr; // Correction coefficient for
- // cluster SigmaY2
+ TTreeSRedirector *fDebugStreamer; //!Debug streamer
- static const Float_t fgkSeedGap; // Distance between inner and outer
- // time bin in seeding
- // (fraction of all time bins)
-
- static const Float_t fgkSeedStep; // Step in iterations
- static const Float_t fgkSeedDepth; // Fraction of TRD allocated for seeding
- static const Float_t fgkSkipDepth; // Fraction of TRD which can be skipped
- // in track prolongation
- static const Double_t fgkMaxChi2; // max increment in track chi2
-
- static const Float_t fgkMinClustersInTrack; // min fraction of clusters in track
- static const Float_t fgkMinClustersInSeed; // min fraction of clusters in seed
- static const Float_t fgkMaxSeedDeltaZ; // max dZ in MakeSeeds
- static const Float_t fgkMaxSeedDeltaZ12; // max abs(z1-z2) in MakeSeeds
- static const Float_t fgkMaxSeedC; // max initial curvature in MakeSeeds
- static const Float_t fgkMaxSeedTan; // max initial Tangens(lambda) in MakeSeeds
- static const Float_t fgkMaxSeedVertexZ; // max vertex Z in MakeSeeds
- static const Double_t fgkSeedErrorSY; // sy parameter in MakeSeeds
- static const Double_t fgkSeedErrorSY3; // sy3 parameter in MakeSeeds
- static const Double_t fgkSeedErrorSZ; // sz parameter in MakeSeeds
- static const Float_t fgkLabelFraction; // min fraction of clusters in GetTrackLabel
- static const Float_t fgkWideRoad; // max road width in FindProlongation
-
- ClassDef(AliTRDtracker,1) // manager base class
+ ClassDef(AliTRDtracker,2) // TRD tracker
};
-
#endif
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