Line data Source code
1 : #ifndef AliHMPIDRecon_h
2 : #define AliHMPIDRecon_h
3 :
4 : /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 : * See cxx source for full Copyright notice */
6 :
7 : //////////////////////////////////////////////////////////////////////////
8 : // //
9 : // AliHMPIDRecon //
10 : // //
11 : // HMPID class to perfom pattern recognition based on Hough transfrom //
12 : // //
13 : //////////////////////////////////////////////////////////////////////////
14 :
15 :
16 : #include <TNamed.h> //base class
17 : #include <TVector3.h> //fields
18 :
19 : class TClonesArray; //CkovAngle()
20 : class AliESDtrack; //CkovAngle()
21 : class AliHMPIDParam;//general pourpose
22 :
23 : class AliHMPIDRecon : public TNamed
24 : {
25 : public :
26 : AliHMPIDRecon();
27 176 : virtual ~AliHMPIDRecon() {;} //dtor
28 :
29 : void InitVars (Int_t n); //init space for variables
30 : void DeleteVars ()const; //delete variables
31 : void CkovAngle (AliESDtrack *pTrk,TClonesArray *pCluLst,Int_t index,Double_t nmean,Float_t xRa,Float_t yRa );//reconstructed Theta Cerenkov
32 : Bool_t FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer ); //find ckov angle for single photon candidate
33 : Double_t FindRingCkov (Int_t iNclus ); //best ckov for ring formed by found photon candidates
34 : void FindRingGeom (Double_t ckovAng,Int_t level=1 ); //estimated area of ring in cm^2 and portion accepted by geometry
35 : TVector2 IntWithEdge (TVector2 p1,TVector2 p2 )const;//find intercection between plane and lines of 2 thetaC
36 : Int_t FlagPhot (Double_t ckov,TClonesArray *pCluLst,AliESDtrack *pTrk ); //is photon ckov near most probable track ckov
37 : Double_t HoughResponse( ); //most probable track ckov angle
38 : void Propagate (const TVector3 dir, TVector3 &pos,Double_t z )const;//propagate photon alogn the line
39 : void Refract ( TVector3 &dir, Double_t n1, Double_t n2)const;//refract photon on the boundary
40 : TVector2 TracePhot (Double_t ckovTh,Double_t ckovPh )const;//trace photon created by track to PC
41 : void AddObjectToFriends(TClonesArray *pCluLst, Int_t photonIndex, AliESDtrack *pTrk ); // Add AliHMPIDCluster object to ESD friends
42 : TVector2 TraceForward (TVector3 dirCkov )const;//tracing forward a photon from (x,y) to PC
43 : void Lors2Trs (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer )const;//LORS to TRS
44 : void Trs2Lors (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer )const;//TRS to LORS
45 : TVector2 GetMip ( )const
46 0 : {return fMipPos;} //mip coordinates
47 : Double_t GetRingArea ( )const
48 0 : {return fRingArea;} //area of the current ring in cm^2
49 : Double_t GetRingAcc ( )const
50 0 : {return fRingAcc;} //portion of the ring ([0,1]) accepted by geometry.To scale n. of photons
51 : Double_t FindRingExt (Double_t ckov,Int_t ch,Double_t xPc,Double_t yPc,Double_t thRa,Double_t phRa);//find ring acceptance by external parameters
52 : void SetTrack (Double_t xRad,Double_t yRad,Double_t theta,Double_t phi )
53 88 : {fTrkDir.SetMagThetaPhi(1,theta,phi); fTrkPos.Set(xRad,yRad);} //set track parameter at RAD
54 : void SetImpPC (Double_t xPc,Double_t yPc )
55 16 : {fPc.Set(xPc,yPc);} //set track impact to PC
56 : void SetMip (Double_t xmip,Double_t ymip )
57 0 : {fMipPos.Set(xmip,ymip);} //set track impact to PC
58 : enum ETrackingFlags {kNotPerformed=-20,kMipDistCut=-9,kMipQdcCut=-5,kNoPhotAccept=-11,kNoRad = -22};
59 : //
60 : protected:
61 : Int_t fPhotCnt; // counter of photons candidate
62 : Int_t *fPhotFlag; // flags of photon candidates
63 : Int_t *fPhotClusIndex; // cluster index of photon candidates
64 : Double_t *fPhotCkov; // Ckov angles of photon candidates, [rad]
65 : Double_t *fPhotPhi; // phis of photons candidates, [rad]
66 : Double_t *fPhotWei; // weigths of photon candidates
67 : Double_t fCkovSigma2; // sigma2 of the reconstructed ring
68 :
69 : Bool_t fIsWEIGHT; // flag to consider weight procedure
70 : Float_t fDTheta; // Step for sliding window
71 : Float_t fWindowWidth; // Hough width of sliding window
72 :
73 : Double_t fRingArea; // area of a given ring
74 : Double_t fRingAcc; // fraction of the ring accepted by geometry
75 : TVector3 fTrkDir; // track direction in LORS at RAD
76 : TVector2 fTrkPos; // track positon in LORS at RAD
77 : TVector2 fMipPos; // mip positon for a given track
78 : TVector2 fPc; // track position at PC
79 :
80 : AliHMPIDParam *fParam; // Pointer to AliHMPIDParam
81 :
82 : private:
83 : AliHMPIDRecon(const AliHMPIDRecon& r); //dummy copy constructor
84 : AliHMPIDRecon &operator=(const AliHMPIDRecon& r); //dummy assignment operator
85 : //
86 12 : ClassDef(AliHMPIDRecon,3)
87 : };
88 :
89 : #endif // #ifdef AliHMPIDRecon_cxx
90 :
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