1 #ifndef ALIMUONCLUSTERFINDERAZ_H
2 #define ALIMUONCLUSTERFINDERAZ_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
9 /// \class AliMUONClusterFinderAZ
10 /// \brief Cluster finder in MUON arm of ALICE
12 /// \author Alexander Zinchenko, JINR Dubna
18 class AliMUONVGeometryDESegmentation;
20 class AliMUONClusterDrawAZ;
21 #include "AliMUONClusterFinderVS.h"
22 #include "TMatrixDfwd.h"
24 class AliMUONClusterFinderAZ : public AliMUONClusterFinderVS
27 AliMUONClusterFinderAZ(Bool_t draw = 0); // Constructor
28 virtual ~AliMUONClusterFinderAZ(); // Destructor
30 void FindRawClusters(); // the same interface as for old cluster finder
31 void EventLoop(Int_t nev = 0, Int_t ch = 0); // first event
32 Bool_t TestTrack(Int_t t) const; // test if track was selected
33 Int_t GetNPads(Int_t cath) const { return fnPads[cath]; }
34 Int_t GetIJ(Int_t indx, Int_t iPad) const { return fPadIJ[indx][iPad]; }
35 Float_t GetXyq(Int_t indx, Int_t iPad) const { return fXyq[indx][iPad]; }
36 Float_t GetZpad() const { return fZpad; }
37 Bool_t GetUsed(Int_t cath, Int_t dig) const { return fUsed[cath][dig]; }
38 void SetUsed(Int_t cath, Int_t dig) { fUsed[cath][dig] = kTRUE; } // mark used digits
39 void SetUnused(Int_t cath, Int_t dig) { fUsed[cath][dig] = kFALSE; } // unmark digits
40 void SetReco(Int_t iReco) { fReco = iReco; } // set reco flag
41 void SetStart(Int_t iCath, Int_t iPad) { fCathBeg = iCath; fPadBeg[0] = fPadBeg[1] = 0; fPadBeg[fCathBeg] = iPad; } // start
44 AliMUONClusterFinderAZ(const AliMUONClusterFinderAZ& rhs);
45 AliMUONClusterFinderAZ& operator=(const AliMUONClusterFinderAZ& rhs);
49 static const Int_t fgkDim = 10000; // array size
50 static const Double_t fgkCouplMin; // threshold on coupling
51 static const Double_t fgkZeroSuppression; // average zero suppression value
52 static const Double_t fgkSaturation; // average saturation level
54 static AliMUONClusterFinderAZ* fgClusterFinder; // the ClusterFinderAZ instance
56 Int_t fnPads[2]; // ! number of pads in the cluster on 2 cathodes
57 Float_t fXyq[7][fgkDim]; // ! pad information
58 Int_t fPadIJ[4][fgkDim]; // ! pad information
59 AliMUONVGeometryDESegmentation *fSegmentation[2]; // ! new segmentation
60 Float_t fZpad; // ! z-coordinate of the hit
61 Int_t fNpar; // ! number of fit parameters
62 Double_t fQtot; // ! total cluster charge
63 Int_t fReco; // ! !=0 if run reco with writing of reconstructed clusters
64 Int_t fCathBeg; // ! starting cathode (for combined cluster / track reco)
65 Int_t fPadBeg[2]; // ! starting pads (for combined cluster / track reco)
67 static TMinuit* fgMinuit; // ! Fitter
68 Bool_t fUsed[2][fgkDim]; // ! flags for used pads
69 AliMUONClusterDrawAZ *fDraw; // ! drawing object
70 TObjArray* fPixArray; // ! collection of pixels
71 Int_t fnCoupled; // ! number of coupled clusters in precluster
72 Int_t fDebug; // ! debug level
76 void AddPad(Int_t cath, Int_t digit); // add a pad to the cluster
77 Bool_t Overlap(Int_t cath, AliMUONDigit *dig); // check if the pad from one cathode overlaps with a pad in the cluster on the other cathode
78 Bool_t Overlap(Float_t *xy1, Int_t iPad, Float_t *xy12, Int_t iSkip); // check if pads xy1 and iPad overlap and return overlap area
79 Bool_t CheckPrecluster(Int_t *nShown); // check precluster to simplify it (if possible)
80 void BuildPixArray(); // build array of pixels
81 void AdjustPixel(Float_t width, Int_t ixy); // adjust size of small pixels
82 void AdjustPixel(Float_t wxmin, Float_t wymin); // adjust size of large pixels
83 Bool_t MainLoop(Int_t iSimple); // repeat MLEM algorithm until pixels become sufficiently small
84 void Mlem(Double_t *coef, Double_t *probi, Int_t nIter); // use MLEM for cluster finding
85 void FindCOG(TH2D *mlem, Double_t *xyc); // find COG position around maximum bin
86 Int_t FindNearest(AliMUONPixel *pixPtr0); // find nearest neighbouring pixel to the given one
87 void Split(TH2D *mlem, Double_t *coef); // steering function for pixels
88 void AddBin(TH2D *mlem, Int_t ic, Int_t jc, Int_t mode, Bool_t* used, TObjArray *pix); // add a bin to the cluster
89 TObject* BinToPix(TH2D *mlem, Int_t jc, Int_t ic); // hist. bin-to-pixel
90 void AddCluster(Int_t ic, Int_t nclust, TMatrixD *aijcluclu, Bool_t *used, Int_t *clustNumb, Int_t &nCoupled); // add a cluster to the group of coupled clusters
91 Double_t MinGroupCoupl(Int_t nCoupled, Int_t *clustNumb, TMatrixD *aijcluclu, Int_t *minGroup); // find group of cluster with min. coupling to others
92 Int_t SelectPad(Int_t nCoupled, Int_t nForFit, Int_t *clustNumb, Int_t *clustFit, TMatrixD *aijcluclu); //select pads for fit
93 void Merge(Int_t nForFit, Int_t nCoupled, Int_t *clustNumb, Int_t *clustFit, TObjArray **clusters, TMatrixD *aijcluclu, TMatrixD *aijclupad); // merge clusters
94 Int_t Fit(Int_t iSimple, Int_t nfit, Int_t *clustFit, TObjArray **clusters, Double_t *parOk); // do the fitting
95 void UpdatePads(Int_t nfit, Double_t *par); // subtract fitted charges from pads
96 void AddRawCluster(Double_t x, Double_t y, Double_t qTot, Double_t fmin, Int_t nfit, Int_t *tracks, Double_t sigx, Double_t sigy, Double_t dist); // add new reconstructed cluster
97 Int_t FindLocalMaxima(TObjArray *pixArray, Int_t *localMax, Double_t *maxVal); // find local maxima
98 void FlagLocalMax(TH2D *hist, Int_t i, Int_t j, Int_t *isLocalMax); // flag local max
99 void FindCluster(Int_t *localMax, Int_t iMax); // find cluster around local max
100 void AddVirtualPad(); // add virtual pads for some clusters (if necessary)
101 void PadsInXandY(Int_t &nInX, Int_t &nInY); // get number of pads in X and Y
102 // This function is used for fitting
103 void Fcn1(Int_t &npar, Double_t *gin, Double_t &f, Double_t *par, Int_t iflag);
104 void Simple(); // process simple cluster
106 void Errors(AliMUONRawCluster *clus); // correct coordinates and eval. errors
107 void Errors(Int_t ny, Int_t nx, Int_t iby, Int_t ibx, Double_t fmin,
108 Double_t wy, Double_t wx, Int_t iover,
109 Double_t dyc, Double_t dxc, Double_t qtot,
110 Double_t &yrec, Double_t &xrec, Double_t &erry, Double_t &errx);
112 // Dummy methods for overloading warnings
113 void FindCluster(int, int, int, AliMUONRawCluster&) {return;}
114 void FindLocalMaxima(AliMUONRawCluster*) {return;}
115 void Split(AliMUONRawCluster*) {return;}
116 void AddRawCluster(AliMUONRawCluster&) {return;}
118 ClassDef(AliMUONClusterFinderAZ,0) // cluster finder in MUON arm of ALICE