MdcHit.h

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//--------------------------------------------------------------------------
// File and Version Information:
//  $Id: MdcHit.h,v 1.20 2010/05/24 11:41:12 zhangy Exp $
//
// Description:
//  Class Header  for |MdcHit| 
//      Fundamental Hit class for use by drift chamber fits and pattern
//      recogition code
//
// Environment:
//  Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Author List:
//      S. Schaffner - Original
//  A. Snyder - Modifications to use |MdcGeom| and to construct
//                  from |MdcDigi|s
//
// Copyright Information:
//  Copyright (C) 1996  SLAC
// 
// History:
//  Migration for BESIII MDC
//
// 20080303 Zhang Yao -- Delete return of DetElemId
//------------------------------------------------------------------------
 
#ifndef MDCHIT_H
#define MDCHIT_H
#include "MdcGeom/Constants.h"
#include "MdcRawEvent/MdcDigi.h"
#include "MdcGeom/MdcDetector.h"
#include "MdcGeom/MdcLayer.h"
#include "MdcGeom/MdcSWire.h"
#include "TrkBase/TrkFundHit.h"
#include "TrkBase/TrkEnums.h"
#include "Identifier/Identifier.h"
#include "MdcCalibFunSvc/MdcCalibFunSvc.h"
 
class Trajectory;
 
extern const CLID& CLID_MdcHit;
 
 
class MdcHit : public TrkFundHit {
public:
 
  MdcHit(const MdcDigi*& digi, const MdcDetector*& det);
  MdcHit(const MdcHit&);
 
  virtual ~MdcHit();
 
  MdcHit& operator=(const MdcHit&);
  bool operator==(const MdcHit&) const;
 
  const MdcDigi*        digi ()     const { return _digiPtr;  }
  const MdcLayer*       layer()     const { return _layerPtr; }
  const MdcSWire*       wire ()     const { return _wirePtr;  }
  const MdcDetector*    geom ()     const { return _geomPtr;  }
  const MdcCalibFunSvc* calibSvc()  const { return m_mdcCalibFunSvc; }
  Identifier        mdcId()         const { return _id; }
  unsigned          layernumber()   const { return _layer; }
  unsigned          wirenumber()    const { return _wire; }
  unsigned      tdcIndex()      const { return _iTdc; }
  unsigned      adcIndex()      const { return _iAdc; }
  double        charge()        const { return _charge; } 
  double        rawTime()       const { return _rawTime; }
  double        driftTime(double tof, double z) const;
  double        driftDist(double, int, double, double, double) const;
  double        driftDist(double bunchTime, int ambig) const;  
  double        sigma(double, int, double, double, double) const;
  double        sigma(double driftdist, int ambig = 0) const;
  int           whichView() const{ return _layerPtr->view(); } 
  const  Trajectory*    hitTraj() const;
  TrkEnums::TrkViewInfo whatView() const { return whichView()==0?TrkEnums::xyView:TrkEnums::bothView; }
  double        phi() const { return _phi;}       // phi at chamber center
  double        x()   const { return _rmid*_cosphi; } // x at chamber center
  double        y()   const { return _rmid*_sinphi; } // y at chamber center
  const double      phi(double z) const{return wire()->phiDC(z);}  // phi at z 
  double        x  (double z) const{return wire()->xWireDC(z);}// x at global z
  double        y  (double z) const{return wire()->yWireDC(z);}// y at global z
  double        rMid()        const { return _rmid; } // R at chamber center
  double        zlen()        const { return _zlen; } // chamber extent in z
  unsigned      status()      const { return _status;}// status
 
  void          setCalibSvc(const MdcCalibFunSvc* calibSvc);
  void          setCountPropTime(const bool count) { m_countPropTime = count;}
  void          setCosmicFit(const bool cosmicfit) { m_cosmicFit = cosmicfit; }
  bool          isCosmicFit() const { return m_cosmicFit; }
 
  void          print(std::ostream &o) const;
  void          printAll(std::ostream &o) const;
                                                                                
private:
 
  // Calculate crude (no track info) correction of time for flight 
  // delay (assumes tracks from origin); wire propagation assumes z=0;
  // return time in seconds(_rmid is in cm)
  double crudeTof() const { return  _rmid/Constants::c; }
 
  //hide the copy ctor and assignment op, at least until somebody needs them
  MdcHit();
 
  friend class MdcMakeHits;
 
  const MdcDigi*    _digiPtr;   // pointer to digi
  const MdcDetector*    _geomPtr;   // pointer to geometry
  const MdcLayer*   _layerPtr;  // pointer to layer  
  const MdcSWire*   _wirePtr;   // pointer to wire
  const MdcCalibFunSvc* m_mdcCalibFunSvc;//pointer to MdcCalibFunSvc
  Identifier        _id;            // Mdc Identifier 
  unsigned      _layer;     // layer number
  unsigned      _wire;      // wire number 
  unsigned      _iTdc;      // time channel
  unsigned      _iAdc;      // charge channel
  double        _rawTime;   // raw time, in NANO seconds
  double        _charge;        // charge 
  double        _rmid;      // radius of wire at mid chamber
  double        _zlen;      // wire length
  double        _phi;       // phi of wire
  double        _cosphi;    // cos(phi)
  double        _sinphi;    // sin(phi)
  unsigned      _status;        // status flag;
  double        _T0Walk;        // time of T0(from calib) and time walk
  static bool       m_cosmicFit;    // flag for csmc
  static bool       m_countPropTime;// flag if count propergation time      
};
extern std::ostream& operator<<(std::ostream &o,const MdcHit& aHit);
 
typedef ObjectVector<MdcHit> MdcHitCol;
 
#endif