Pattern recognition reorganized (for display,monitoring...)
[u/mrichter/AliRoot.git] / HMPID / AliHMPIDRecon.h
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
19 class TClonesArray; //CkovAngle()
20 class AliESDtrack;  //CkovAngle()
21
22 class AliHMPIDRecon : public TTask 
23 {
24 public : 
25              AliHMPIDRecon();
26     virtual ~AliHMPIDRecon()                                                          {}
27
28   
29   void     CkovAngle    (AliESDtrack *pTrk,TClonesArray *pCluLst,Double_t nmean             );     //reconstructed Theta Cerenkov
30   Bool_t   FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer    );     //find ckov angle for single photon candidate
31   Double_t FindRingCkov (Int_t iNclus                                                       );     //best ckov for ring formed by found photon candidates
32   Double_t FindRingArea (Double_t ckov                                                      )const;//estimated area of ring in cm^2
33   Int_t    FlagPhot     (Double_t ckov                                                      );     //is photon ckov near most probable track ckov
34   Double_t HoughResponse(                                                                   );     //most probable track ckov angle
35   void     Propagate    (const TVector3  dir,      TVector3 &pos,Double_t z                 )const;//propagate photon alogn the line  
36   void     Refract      (      TVector3 &dir,                    Double_t n1,    Double_t n2)const;//refract photon on the boundary
37   TVector2 TracePhot    (Double_t ckovTh,Double_t ckovPh                                    )const;//trace photon created by track to PC 
38   TVector2 TraceForward (TVector3 dirCkov                                                   )const;//tracing forward a photon from (x,y) to PC
39   void     RecPhot      (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer               );     //theta,phi cerenkov reconstructed
40   void     SetTrack     (Double_t xRad,Double_t yRad,Double_t theta,Double_t phi            )
41                                 {fTrkDir.SetMagThetaPhi(1,theta,phi);  fTrkPos.Set(xRad,yRad);}    //set track parameter at RAD
42   void     SetImpPC     (Double_t xPc,Double_t yPc                                          )
43                                 {fPc.Set(xPc,yPc);}                                                //set track impact to PC 
44   Double_t SigLoc       (Double_t ckovTh,Double_t ckovPh,Double_t beta                      )const;//error due to cathode segmetation
45   Double_t SigGeom      (Double_t ckovTh,Double_t ckovPh,Double_t beta                      )const;//error due to unknown photon origin
46   Double_t SigCrom      (Double_t ckovTh,Double_t ckovPh,Double_t beta                      )const;//error due to unknonw photon energy
47   Double_t Sigma2       (Double_t ckovTh,Double_t ckovPh                                    )const;//photon candidate sigma
48   enum ETrackingFlags {kMipDistCut=-9,kMipQdcCut=-5,kNoPhotAccept=-11};
49   
50   static const Double_t fgkRadThick;                      //radiator thickness
51   static const Double_t fgkWinThick;                      //window thickness
52   static const Double_t fgkGapThick;                      //proximity gap thickness
53   static const Double_t fgkWinIdx;                        //mean refractive index of WIN material (SiO2) 
54   static const Double_t fgkGapIdx;                        //mean refractive index of GAP material (CH4)
55 protected:
56   Double_t fRadNmean;                          //C6F14 mean refractive index
57   Int_t    fPhotCnt;                           // counter of photons candidate
58   Int_t    fPhotFlag[3000];                    // flags of photon candidates
59   Double_t fPhotCkov[3000];                    // Ckov angles of photon candidates, [rad]
60   Double_t fPhotPhi [3000];                    // phis of photons candidates, [rad]
61   Double_t fPhotWei [3000];                    // weigths of photon candidates
62   Double_t fCkovSigma2;                        // sigma2 of the reconstructed ring
63
64   Bool_t  fIsWEIGHT;                          // flag to consider weight procedure
65   Float_t fDTheta;                            // Step for sliding window
66   Float_t fWindowWidth;                       // Hough width of sliding window
67   
68   TVector3 fTrkDir;                           //track direction in LORS at RAD
69   TVector2 fTrkPos;                           //track positon in LORS at RAD
70   TVector2 fPc;                               //track position at PC
71   ClassDef(AliHMPIDRecon,0)
72 };
73
74 #endif // #ifdef AliHMPIDRecon_cxx
75