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// File: Emc_helix.h                               //
//                                                 //
// A class  for associating a given MDC (fzisan)   //
//  track (helix) to a EMC hit                     //
//                                                 //
//                     S.Behari 13th Jan. 2000     //
//
#ifndef _EMC_HELIX_Flag_
#define _EMC_HELIX_Flag_
#include "GaudiKernel/Algorithm.h"
#include "CLHEP/Geometry/Point3D.h"


class Emc_helix   {
      
  // Provides a candidate emc hit associated 
  // to a given mdc (fzisan) track.
  public:
    Emc_helix  (void);
    ~Emc_helix (void){};

 // information for hit emc candidate. 
   
    double  R_emc;      // radius of emc cylinder   
    double  Fi_emc;     // azmuthal angle of the hit on the emc cylinder.
    double  W_emc;      // dist from the right corner of the cntr / width.
    double  Z_emc;      // z on emc counter 
    double  theta_emc;  //theta ,phi in  the crossing plot
    double  phi_emc; 

 // information for mdc trcak. 
    double  Dr,Phi0,Kappa,Dz,Tanl; // helix parameters
    int    NTrk;       // tot number of mdc tracks  
    double  Phi1;  // phi on the emc cylinder  

    int Emc_Get (double, int,double[]);            // get emc  hit for 
                                         // track id
    // Debug option ([0]:None, !0:Debug)
    void debugOpt(int deb) {
      _debug = deb;
    }
    // Set path length cut value
    void pathlCut(double pathl_max) {
      _pathl_cut = pathl_max;
    }
    // Set Z_emc cut values
    void zemcCut(double zemc_min, double zemc_max) {
      _zemc_cutm = zemc_min;
      _zemc_cutx = zemc_max;
    }

  private:
    double  piby1, pi2, piby44;
    int    _debug;                       // debug if >0 
    double  _pathl_cut;                   // path length max.
    double  _zemc_cutm,_zemc_cutx;        // Z_emc min/max

};

#endif /* _EMC_HELIX_Flag_ */

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