[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 AliHMPIDParam;//general pourpose

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

  void     InitVars     (Int_t n);                                                                 //init space for variables
  void     DeleteVars   ();                                                                        //delete variables
  void     CkovAngle    (AliESDtrack *pTrk,TClonesArray *pCluLst,Double_t nmean, Double_t qthre);  //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 ckovAng                                                   )const;//estimated area of delta ring in cm^2 to weight Hough Transform
  TVector2 IntWithEdge  (TVector2 p1,TVector2 p2                                            )const;//find intercection between plane and lines of 2 thetaC
  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
  TVector2 GetMip       (                                                                   ) 
                        {return fMipPos;}                                                          //mip coordinates
  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 
  void     SetMip       (Double_t xmip,Double_t ymip                                        )
                                {fMipPos.Set(xmip,ymip);}                                          //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^2
  enum ETrackingFlags {kMipDistCut=-9,kMipQdcCut=-5,kNoPhotAccept=-11};
//
protected:
  Int_t     fPhotCnt;                           // counter of photons candidate
  Int_t    *fPhotFlag;                          // flags of photon candidates
  Double_t *fPhotCkov;                          // Ckov angles of photon candidates, [rad]
  Double_t *fPhotPhi;                           // phis of photons candidates, [rad]
  Double_t *fPhotWei;                           // 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  fMipPos;                            //mip positon for a given track
  TVector2  fPc;                                //track position at PC
  
  AliHMPIDParam *fParam;                        //Pointer to AliHMPIDParam
//
  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()
59280a5a	20	class AliESDtrack; //CkovAngle()
ffb1ac19	21	class AliHMPIDParam;//general pourpose
59280a5a	22
d3da6dc4	23	class AliHMPIDRecon : public TTask
	24	{
	25	public :
	26	AliHMPIDRecon();
ffb1ac19	27	virtual ~AliHMPIDRecon() {;} //dtor
611e810d	28
ffb1ac19	29	void InitVars (Int_t n); //init space for variables
ffb1ac19	30	void DeleteVars (); //delete variables
afe12692	31	void CkovAngle (AliESDtrack pTrk,TClonesArray pCluLst,Double_t nmean, Double_t qthre); //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
4598109f	34	Double_t FindRingArea (Double_t ckovAng )const;//estimated area of delta ring in cm^2 to weight Hough Transform
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
d3da6dc4	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
	42	void RecPhot (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer ); //theta,phi cerenkov reconstructed
4598109f	43	TVector2 GetMip ( )
4598109f	44	{return fMipPos;} //mip coordinates
a591e55f	45	void SetTrack (Double_t xRad,Double_t yRad,Double_t theta,Double_t phi )
	46	{fTrkDir.SetMagThetaPhi(1,theta,phi); fTrkPos.Set(xRad,yRad);} //set track parameter at RAD
	47	void SetImpPC (Double_t xPc,Double_t yPc )
	48	{fPc.Set(xPc,yPc);} //set track impact to PC
4598109f	49	void SetMip (Double_t xmip,Double_t ymip )
ffb1ac19	50	{fMipPos.Set(xmip,ymip);} //set track impact to PC
d3da6dc4	51	Double_t SigLoc (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to cathode segmetation
	52	Double_t SigGeom (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to unknown photon origin
	53	Double_t SigCrom (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to unknonw photon energy
3b49956b	54	Double_t Sigma2 (Double_t ckovTh,Double_t ckovPh )const;//photon candidate sigma^2
59280a5a	55	enum ETrackingFlags {kMipDistCut=-9,kMipQdcCut=-5,kNoPhotAccept=-11};
43400d2d	56	//
394d35c1	57	protected:
ffb1ac19	58	Int_t fPhotCnt; // counter of photons candidate
	59	Int_t *fPhotFlag; // flags of photon candidates
	60	Double_t *fPhotCkov; // Ckov angles of photon candidates, [rad]
	61	Double_t *fPhotPhi; // phis of photons candidates, [rad]
	62	Double_t *fPhotWei; // weigths of photon candidates
	63	Double_t fCkovSigma2; // sigma2 of the reconstructed ring
d3da6dc4	64
ffb1ac19	65	Bool_t fIsWEIGHT; // flag to consider weight procedure
	66	Float_t fDTheta; // Step for sliding window
	67	Float_t fWindowWidth; // Hough width of sliding window
	68
	69	TVector3 fTrkDir; //track direction in LORS at RAD
	70	TVector2 fTrkPos; //track positon in LORS at RAD
	71	TVector2 fMipPos; //mip positon for a given track
	72	TVector2 fPc; //track position at PC
e0085eed	73
ffb1ac19	74	AliHMPIDParam *fParam; //Pointer to AliHMPIDParam
43400d2d	75	//
d3da6dc4	76	ClassDef(AliHMPIDRecon,0)
d3da6dc4	77	};
cf7e313e	78
d3da6dc4	79	#endif // #ifdef AliHMPIDRecon_cxx
d3da6dc4	80