impoved num precision
[u/mrichter/AliRoot.git] / HMPID / AliHMPIDRecon.h
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d3da6dc4 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 <TTask.h> //base class
17#include <TVector3.h> //fields
18
59280a5a 19class TClonesArray; //CkovAngle()
20class AliESDtrack; //CkovAngle()
ffb1ac19 21class AliHMPIDParam;//general pourpose
59280a5a 22
d3da6dc4 23class AliHMPIDRecon : public TTask
24{
25public :
26 AliHMPIDRecon();
ffb1ac19 27 virtual ~AliHMPIDRecon() {;} //dtor
611e810d 28
ffb1ac19 29 void InitVars (Int_t n); //init space for variables
496c71b0 30 void DeleteVars ()const; //delete variables
97a4d538 31 void CkovAngle (AliESDtrack *pTrk,TClonesArray *pCluLst,Int_t index,Double_t nmean,Float_t xRa,Float_t yRa );//reconstructed Theta Cerenkov
a591e55f 32 Bool_t FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer ); //find ckov angle for single photon candidate
d3da6dc4 33 Double_t FindRingCkov (Int_t iNclus ); //best ckov for ring formed by found photon candidates
2d1a9b21 34 void FindRingGeom (Double_t ckovAng,Int_t level=1 ); //estimated area of ring in cm^2 and portion accepted by geometry
4598109f 35 TVector2 IntWithEdge (TVector2 p1,TVector2 p2 )const;//find intercection between plane and lines of 2 thetaC
d3da6dc4 36 Int_t FlagPhot (Double_t ckov ); //is photon ckov near most probable track ckov
37 Double_t HoughResponse( ); //most probable track ckov angle
a591e55f 38 void Propagate (const TVector3 dir, TVector3 &pos,Double_t z )const;//propagate photon alogn the line
d3da6dc4 39 void Refract ( TVector3 &dir, Double_t n1, Double_t n2)const;//refract photon on the boundary
a591e55f 40 TVector2 TracePhot (Double_t ckovTh,Double_t ckovPh )const;//trace photon created by track to PC
41 TVector2 TraceForward (TVector3 dirCkov )const;//tracing forward a photon from (x,y) to PC
2d1a9b21 42 void Lors2Trs (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer )const;//LORS to TRS
43 void Trs2Lors (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer )const;//TRS to LORS
606697a8 44 TVector2 GetMip ( )const
4598109f 45 {return fMipPos;} //mip coordinates
606697a8 46 Double_t GetRingArea ( )const
2d1a9b21 47 {return fRingArea;} //area of the current ring in cm^2
606697a8 48 Double_t GetRingAcc ( )const
2d1a9b21 49 {return fRingAcc;} //portion of the ring ([0,1]) accepted by geometry.To scale n. of photons
a591e55f 50 void SetTrack (Double_t xRad,Double_t yRad,Double_t theta,Double_t phi )
51 {fTrkDir.SetMagThetaPhi(1,theta,phi); fTrkPos.Set(xRad,yRad);} //set track parameter at RAD
52 void SetImpPC (Double_t xPc,Double_t yPc )
53 {fPc.Set(xPc,yPc);} //set track impact to PC
4598109f 54 void SetMip (Double_t xmip,Double_t ymip )
ffb1ac19 55 {fMipPos.Set(xmip,ymip);} //set track impact to PC
e26c20fa 56 enum ETrackingFlags {kNotPerformed=-20,kMipDistCut=-9,kMipQdcCut=-5,kNoPhotAccept=-11,kNoRad = -22};
43400d2d 57//
394d35c1 58protected:
ffb1ac19 59 Int_t fPhotCnt; // counter of photons candidate
60 Int_t *fPhotFlag; // flags of photon candidates
61 Double_t *fPhotCkov; // Ckov angles of photon candidates, [rad]
62 Double_t *fPhotPhi; // phis of photons candidates, [rad]
63 Double_t *fPhotWei; // weigths of photon candidates
64 Double_t fCkovSigma2; // sigma2 of the reconstructed ring
d3da6dc4 65
ffb1ac19 66 Bool_t fIsWEIGHT; // flag to consider weight procedure
67 Float_t fDTheta; // Step for sliding window
68 Float_t fWindowWidth; // Hough width of sliding window
69
2d1a9b21 70 Double_t fRingArea; // area of a given ring
71 Double_t fRingAcc; // fraction of the ring accepted by geometry
72 TVector3 fTrkDir; // track direction in LORS at RAD
73 TVector2 fTrkPos; // track positon in LORS at RAD
74 TVector2 fMipPos; // mip positon for a given track
75 TVector2 fPc; // track position at PC
e0085eed 76
2d1a9b21 77 AliHMPIDParam *fParam; // Pointer to AliHMPIDParam
8f05fd11 78
79private:
80 AliHMPIDRecon(const AliHMPIDRecon& r); //dummy copy constructor
81 AliHMPIDRecon &operator=(const AliHMPIDRecon& r); //dummy assignment operator
43400d2d 82//
2d1a9b21 83 ClassDef(AliHMPIDRecon,1)
d3da6dc4 84};
cf7e313e 85
d3da6dc4 86#endif // #ifdef AliHMPIDRecon_cxx
87