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c0a16418 | 1 | #ifndef ALIMUONCLUSTERFINDERMLEM_H |
2 | #define ALIMUONCLUSTERFINDERMLEM_H | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | /* $Id$ */ | |
7 | ||
8 | /// \ingroup rec | |
9 | /// \class AliMUONClusterFinderMLEM | |
10 | /// \brief Cluster finder in MUON arm of ALICE | |
11 | /// | |
12 | // Author Alexander Zinchenko, JINR Dubna; Laurent Aphecetche, SUBATECH | |
13 | // | |
14 | ||
15 | class TH2D; | |
16 | class TClonesArray; | |
17 | class TMinuit; | |
18 | class TStopwatch; | |
19 | ||
20 | #ifndef ROOT_TObjArray | |
21 | # include "TObjArray.h" | |
22 | #endif | |
23 | #ifndef ROOT_TVector2 | |
24 | # include "TVector2.h" | |
25 | #endif | |
26 | ||
27 | class AliMUONPad; | |
28 | ||
29 | #include "AliMUONVClusterFinder.h" | |
30 | ||
31 | class AliMUONClusterSplitterMLEM; | |
32 | ||
33 | class AliMUONClusterFinderMLEM : public AliMUONVClusterFinder | |
34 | { | |
35 | public: | |
36 | AliMUONClusterFinderMLEM(Bool_t plot=kFALSE); // Constructor | |
37 | virtual ~AliMUONClusterFinderMLEM(); // Destructor | |
38 | ||
39 | virtual Bool_t Prepare(const AliMpVSegmentation* segmentations[2], | |
40 | TClonesArray* digits[2]); | |
41 | ||
42 | virtual AliMUONCluster* NextCluster(); | |
43 | ||
44 | virtual void Print(Option_t* opt="") const; | |
45 | ||
46 | virtual void Paint(Option_t* opt=""); | |
47 | ||
48 | private: | |
49 | AliMUONClusterFinderMLEM(const AliMUONClusterFinderMLEM& rhs); | |
50 | AliMUONClusterFinderMLEM& operator=(const AliMUONClusterFinderMLEM& rhs); | |
51 | ||
52 | Bool_t WorkOnPreCluster(); | |
53 | ||
54 | /// Check precluster to simplify it (if possible), and return the simplified cluster | |
55 | AliMUONCluster* CheckPrecluster(const AliMUONCluster& cluster); | |
56 | AliMUONCluster* CheckPreclusterTwoCathodes(AliMUONCluster* cluster); | |
57 | AliMUONCluster* CheckPreclusterOneCathode(AliMUONCluster* cluster); | |
58 | ||
59 | /// Checks whether a pad and a pixel have an overlapping area. | |
60 | Bool_t Overlap(const AliMUONPad& pad, const AliMUONPad& pixel); | |
61 | ||
62 | /// build array of pixels | |
63 | void BuildPixArray(AliMUONCluster& cluster); | |
64 | void BuildPixArrayOneCathode(AliMUONCluster& cluster); | |
65 | void BuildPixArrayTwoCathodes(AliMUONCluster& cluster); | |
66 | ||
67 | void RemovePixel(Int_t i); | |
68 | ||
69 | AliMUONPad* Pixel(Int_t i) const; | |
70 | ||
71 | void AdjustPixel(AliMUONCluster& cluster, Float_t width, Int_t ixy); // adjust size of small pixels | |
72 | void AdjustPixel(Double_t wxmin, Double_t wymin); // adjust size of large pixels | |
73 | ||
74 | Bool_t MainLoop(AliMUONCluster& cluster, Int_t iSimple); // repeat MLEM algorithm until pixels become sufficiently small | |
75 | ||
76 | void Mlem(AliMUONCluster& cluster, Double_t *coef, Double_t *probi, Int_t nIter); // use MLEM for cluster finding | |
77 | ||
78 | void FindCOG(TH2D *mlem, Double_t *xyc); // find COG position around maximum bin | |
79 | Int_t FindNearest(AliMUONPad *pixPtr0); // find nearest neighbouring pixel to the given one | |
80 | ||
81 | Int_t FindLocalMaxima(TObjArray *pixArray, Int_t *localMax, Double_t *maxVal); // find local maxima | |
82 | void FlagLocalMax(TH2D *hist, Int_t i, Int_t j, Int_t *isLocalMax); // flag local max | |
83 | void FindCluster(AliMUONCluster& cluster, Int_t *localMax, Int_t iMax); // find cluster around local max | |
84 | void AddVirtualPad(AliMUONCluster& cluster); // add virtual pads for some clusters (if necessary) | |
85 | ||
86 | void PadsInXandY(AliMUONCluster& cluster, Int_t &nInX, Int_t &nInY) const; // get number of pads in X and Y | |
87 | ||
88 | /// Process simple cluster | |
89 | void Simple(AliMUONCluster& cluster); | |
90 | ||
91 | void Neighbours(Int_t cath, Int_t ix0, Int_t iy0, | |
92 | Int_t& nn, | |
93 | Int_t* xList, Int_t* yList); | |
94 | ||
95 | void Plot(const char* outputfile); | |
96 | ||
97 | void ComputeCoefficients(AliMUONCluster& cluster, | |
98 | Double_t* coef, Double_t* probi); | |
99 | ||
100 | void CheckOverlaps(); | |
101 | ||
102 | TStopwatch* Timer(Int_t i) const; | |
103 | ||
104 | private: | |
105 | ||
106 | // Some constants | |
107 | static const Int_t fgkDim = 10000; ///< array size | |
108 | static const Double_t fgkZeroSuppression; ///< average zero suppression value | |
109 | static const Double_t fgkSaturation; ///< average saturation level | |
110 | static const Double_t fgkDistancePrecision; ///< used to check overlaps and so on | |
111 | static const TVector2 fgkIncreaseSize; ///< idem | |
112 | static const TVector2 fgkDecreaseSize; ///< idem | |
113 | ||
114 | AliMUONVClusterFinder* fPreClusterFinder; ///!< the pre-clustering worker | |
115 | AliMUONCluster* fPreCluster; ///<! current pre-cluster | |
116 | TObjArray fClusterList; ///!< clusters corresponding to the current pre-cluster | |
117 | ||
118 | Int_t fEventNumber; ///!< current event being processed | |
119 | Int_t fDetElemId; ///!< current DE being processed | |
120 | Int_t fClusterNumber; ///!< current cluster number | |
121 | ||
122 | const AliMpVSegmentation *fSegmentation[2]; //!< new segmentation | |
123 | ||
124 | Float_t fZpad; //!< z-coordinate of the hit | |
125 | Int_t fReco; //!< !=0 if run reco with writing of reconstructed clusters | |
126 | Int_t fCathBeg; //!< starting cathode (for combined cluster / track reco) | |
127 | Int_t fPadBeg[2]; //!< starting pads (for combined cluster / track reco) | |
128 | ||
129 | static TMinuit* fgMinuit; //!< Fitter | |
130 | ||
131 | TObjArray* fPixArray; //!< collection of pixels | |
132 | Int_t fDebug; //!< debug level | |
133 | Bool_t fPlot; //!< whether we should plot thing (for debug only, quite slow!) | |
134 | ||
135 | TObjArray* fTimers; //!< internal timers | |
136 | enum ETimer { kMainLoop, kCheckPreCluster, kLast }; | |
137 | ||
138 | AliMUONClusterSplitterMLEM* fSplitter; //!< helper class to go from pixel arrays to clusters | |
139 | Int_t fNClusters; //!< total number of clusters | |
140 | Int_t fNAddVirtualPads; //!< number of clusters for which we added virtual pads | |
141 | ||
142 | ClassDef(AliMUONClusterFinderMLEM,0) // cluster finder in MUON arm of ALICE | |
143 | }; | |
144 | ||
145 | #endif |