[u/mrichter/AliRoot.git] / HMPID / AliHMPIDRecon.h

#ifndef AliHMPIDRecon_h
#define AliHMPIDRecon_h

/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// AliHMPIDRecon                                                         //
//                                                                      //
// HMPID class to perfom pattern recognition based on Hough transfrom    //
//                                                                      //
//////////////////////////////////////////////////////////////////////////


#include <TTask.h>        //base class
#include <TVector3.h>     //fields 

class TClonesArray; //CkovAngle()
class AliESDtrack;  //CkovAngle()

class AliHMPIDRecon : public TTask 
{
public : 
             AliHMPIDRecon();
    virtual ~AliHMPIDRecon()                                                          {}

  
  void     CkovAngle    (AliESDtrack *pTrk,TClonesArray *pCluLst,Double_t nmean             );     //reconstructed Theta Cerenkov
  Bool_t   FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer    );     //find ckov angle for single photon candidate
  Double_t FindRingCkov (Int_t iNclus                                                       );     //best ckov for ring formed by found photon candidates
  Double_t FindRingArea (Double_t ckov                                                      )const;//estimated area of ring in cm^2
  Int_t    FlagPhot     (Double_t ckov                                                      );     //is photon ckov near most probable track ckov
  Double_t HoughResponse(                                                                   );     //most probable track ckov angle
  void     Propagate    (const TVector3  dir,      TVector3 &pos,Double_t z                 )const;//propagate photon alogn the line  
  void     Refract      (      TVector3 &dir,                    Double_t n1,    Double_t n2)const;//refract photon on the boundary
  TVector2 TracePhot    (Double_t ckovTh,Double_t ckovPh                                    )const;//trace photon created by track to PC 
  TVector2 TraceForward (TVector3 dirCkov                                                   )const;//tracing forward a photon from (x,y) to PC
  void     RecPhot      (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer               );     //theta,phi cerenkov reconstructed
  void     SetTrack     (Double_t xRad,Double_t yRad,Double_t theta,Double_t phi            )
                                {fTrkDir.SetMagThetaPhi(1,theta,phi);  fTrkPos.Set(xRad,yRad);}    //set track parameter at RAD
  void     SetImpPC     (Double_t xPc,Double_t yPc                                          )
                                {fPc.Set(xPc,yPc);}                                                //set track impact to PC 
  Double_t SigLoc       (Double_t ckovTh,Double_t ckovPh,Double_t beta                      )const;//error due to cathode segmetation
  Double_t SigGeom      (Double_t ckovTh,Double_t ckovPh,Double_t beta                      )const;//error due to unknown photon origin
  Double_t SigCrom      (Double_t ckovTh,Double_t ckovPh,Double_t beta                      )const;//error due to unknonw photon energy
  Double_t Sigma2       (Double_t ckovTh,Double_t ckovPh                                    )const;//photon candidate sigma
  enum ETrackingFlags {kMipDistCut=-9,kMipQdcCut=-5,kNoPhotAccept=-11};

protected:
  Double_t fRadNmean;                          //C6F14 mean refractive index
  Int_t    fPhotCnt;                           // counter of photons candidate
  Int_t    fPhotFlag[3000];                    // flags of photon candidates
  Double_t fPhotCkov[3000];                    // Ckov angles of photon candidates, [rad]
  Double_t fPhotPhi [3000];                    // phis of photons candidates, [rad]
  Double_t fPhotWei [3000];                    // weigths of photon candidates
  Double_t fCkovSigma2;                        // sigma2 of the reconstructed ring

  Bool_t  fIsWEIGHT;                          // flag to consider weight procedure
  Float_t fDTheta;                            // Step for sliding window
  Float_t fWindowWidth;                       // Hough width of sliding window
  
  TVector3 fTrkDir;                           //track direction in LORS at RAD
  TVector2 fTrkPos;                           //track positon in LORS at RAD
  TVector2 fPc;                               //track position at PC
  
private:  
  static const Double_t fgkRadThick;                      //radiator thickness
  static const Double_t fgkWinThick;                      //window thickness
  static const Double_t fgkGapThick;                      //proximity gap thickness
  static const Double_t fgkWinIdx;                        //mean refractive index of WIN material (SiO2) 
  static const Double_t fgkGapIdx;                        //mean refractive index of GAP material (CH4)
  
  ClassDef(AliHMPIDRecon,0)
};

#endif // #ifdef AliHMPIDRecon_cxx
Commit	Line	Data
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	19	class TClonesArray; //CkovAngle()
	20	class AliESDtrack; //CkovAngle()
	21
d3da6dc4	22	class AliHMPIDRecon : public TTask
	23	{
	24	public :
	25	AliHMPIDRecon();
	26	virtual ~AliHMPIDRecon() {}
	27
	28
a591e55f	29	void CkovAngle (AliESDtrack pTrk,TClonesArray pCluLst,Double_t nmean ); //reconstructed Theta Cerenkov
a591e55f	30	Bool_t FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer ); //find ckov angle for single photon candidate
d3da6dc4	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
a591e55f	35	void Propagate (const TVector3 dir, TVector3 &pos,Double_t z )const;//propagate photon alogn the line
d3da6dc4	36	void Refract ( TVector3 &dir, Double_t n1, Double_t n2)const;//refract photon on the boundary
a591e55f	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
d3da6dc4	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
59280a5a	48	enum ETrackingFlags {kMipDistCut=-9,kMipQdcCut=-5,kNoPhotAccept=-11};
423554a3	49
394d35c1	50	protected:
abb5f786	51	Double_t fRadNmean; //C6F14 mean refractive index
d3da6dc4	52	Int_t fPhotCnt; // counter of photons candidate
	53	Int_t fPhotFlag[3000]; // flags of photon candidates
	54	Double_t fPhotCkov[3000]; // Ckov angles of photon candidates, [rad]
	55	Double_t fPhotPhi [3000]; // phis of photons candidates, [rad]
	56	Double_t fPhotWei [3000]; // weigths of photon candidates
	57	Double_t fCkovSigma2; // sigma2 of the reconstructed ring
	58
	59	Bool_t fIsWEIGHT; // flag to consider weight procedure
	60	Float_t fDTheta; // Step for sliding window
	61	Float_t fWindowWidth; // Hough width of sliding window
	62
a591e55f	63	TVector3 fTrkDir; //track direction in LORS at RAD
	64	TVector2 fTrkPos; //track positon in LORS at RAD
	65	TVector2 fPc; //track position at PC
e0085eed	66
	67	private:
	68	static const Double_t fgkRadThick; //radiator thickness
	69	static const Double_t fgkWinThick; //window thickness
	70	static const Double_t fgkGapThick; //proximity gap thickness
	71	static const Double_t fgkWinIdx; //mean refractive index of WIN material (SiO2)
	72	static const Double_t fgkGapIdx; //mean refractive index of GAP material (CH4)
	73
d3da6dc4	74	ClassDef(AliHMPIDRecon,0)
d3da6dc4	75	};
cf7e313e	76
d3da6dc4	77	#endif // #ifdef AliHMPIDRecon_cxx
d3da6dc4	78