MpdRoot_KFParticle/kalman/MpdKalmanHit.h

#ifndef MPDKALMANHIT_H
#define MPDKALMANHIT_H

/// \ingroup rec
/// \class MpdKalmanHit
/// \brief MPD hit for Kalman tracking 
///
/// \author Alexander Zinchenko, LHEP JINR Dubna

#include <TArrayI.h>
#include <TMath.h>
#include <TObject.h>

class MpdKalmanHit : public TObject
{

 public:
  enum HitType {kFixedP, kFixedR, kFixedZ};
  enum HitFlag {kUsed = 1, kMirror = 2, kMlem = 4, kOverflow = 8, kEdge = 16,
		kVirtual = 32};
 public:
  
  MpdKalmanHit(); ///< Default ctor
  MpdKalmanHit(Int_t detID, Int_t nDim, HitType hitType, Double_t *meas, Double_t *err, Double_t *cosSin, Double_t signal, Double_t dist, Int_t index, Double_t edge = 99.); ///< Ctor
  MpdKalmanHit (const MpdKalmanHit& hit); ///< copy constructor
  virtual ~MpdKalmanHit(); ///< Destructor
  Int_t GetDetectorID() const { return fDetectorID; } ///< get detector ID
  Int_t GetLayer() const { return Int_t(fDetectorID/1000000); } ///< get layer No.
  HitType GetType() const { return fHitType; } ///< Get hit type
  Int_t GetNofDim() const { return fNofDim; } ///< get number of measur. per point 
  Int_t GetIndex(Int_t indx = 0) const { return fIndex[indx]; } ///< Get index of detector hit
  TArrayI* Index() { return &fIndex; } ///< Get index array of detector hit
  Int_t GetFlag() const { return fFlag; } ///< Get flag
  //Bool_t IsMirror() const { return fFlag / 1000; } ///< Get mirror flag
  Bool_t IsMirror() const { return fFlag & kMirror; } ///< Get mirror flag
  Double_t GetLength() const { return fLength; } ///< Get track length
  Double_t GetMeas(Int_t indx) const { return fMeas[indx]; } ///< Get measurement 
  Double_t GetErr(Int_t indx) const { return fErr[indx]; } ///< Get measurement error
  Double_t GetCosSin(Int_t indx) const { return fCosSin[indx]; } ///< Cos (Sin)
  Double_t GetPhi() const { return TMath::ATan2(fCosSin[1],fCosSin[0]); } ///< angle
  Double_t GetSignal() const { return fSignal; } ///< Signal value
  Double_t GetDist() const { return fDist; } ///< Distance to interaction point
  Double_t GetPos() const; ///< Distance to interaction point
  Double_t GetEdge() const { return fEdge; } ///< Distance to sector boundary
  //Double_t GetXY(Int_t indx) const { return fXY[indx]; } ///< get wire X or Y

  void SetDetectorID(Int_t detID) { fDetectorID = detID; } ///< set detector ID
  void SetNofDim(Int_t nDim) { fNofDim = nDim; } ///< set number of measur. / point
  void SetType(HitType type) { fHitType = type; } ///< Set hit type
  void SetFlag(Int_t flag) { fFlag = flag; } ///< Set flag
  //void SetMirror() { fFlag += 1000*TMath::Sign(1,fFlag); } ///< set mirror flag
  void SetMirror() { fFlag |= kMirror; } ///< set mirror flag
  void SetLength(Double_t leng) { fLength = leng; } ///< set track length
  void SetMeas(Int_t indx, Double_t meas) { fMeas[indx] = meas; } ///< set measurement 
  void SetErr(Int_t indx, Double_t err) { fErr[indx] = err; } ///< set measurement error
  void SetCosSin(Int_t indx, Double_t cos) { fCosSin[indx] = cos; } ///< set cos(angle) or sin(angle)
  void SetSignal(Double_t signal) { fSignal = signal; } ///< set signal value
  void SetDist(Double_t dist) { fDist = dist; } ///< set distance
  void SetPos(Double_t pos) { fDist = pos; } ///< set distance
  void SetIndex(Int_t indx); ///< Add index of detector hit
  void SetEdge(Double_t edge) { fEdge = edge; } ///< set distance to sector boundary

  Bool_t IsSortable() const { return kTRUE; }
  Int_t Compare(const TObject* hit) const; ///< sort in descending order in detector ID
  void Print(Option_t *opt); ///< print hit info

 private:

  Int_t fDetectorID; ///< detector ID
  Int_t fFlag; ///< flag
  //Int_t fIndex; ///< MC point index
  TArrayI fIndex; ///< MC point indices
  HitType fHitType; ///< hit type
  Int_t fNofDim; ///< number of measurements per point
  //Bool_t fMirror; ///< flag for mirror hit (left-right ambiguity)
  Double32_t fLength; ///< track length (temporary entry)
  Double32_t fMeas[2]; ///< measurements 
  Double32_t fErr[2]; ///< measurement errors
  Double32_t fCosSin[2]; ///< rotation factors (for stereo measurements)
  Double32_t fSignal; ///< signal
  Double32_t fDist; ///< distance to interaction point
  Double32_t fEdge; ///< distance to sector boundary
  //Double_t fXY[2]; ///< X and Y of some point on the wire (for stereo measurements)

  ClassDef(MpdKalmanHit,4);
};
#endif