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// $Id: GVFlashShowerParameterisation.hh,v 1.2 2006/06/29 19:14:06 gunter Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
//
//---------------------------------------------------------------
//  GEANT 4 class header file
//
//  GVFlashShowerParameterisation
//
//  Class description:
//
//  Base class for GFlash shower parameterisation.

// Author: Joanna Weng - 11.2005
//---------------------------------------------------------------
#ifndef GVFlashShowerParameterisation_h
#define GVFlashShowerParameterisation_h 1

#include "globals.hh"
#include "GVFlashHomoShowerTuning.hh"

class G4Material;

class GVFlashShowerParameterisation
{
  public:  // with description

    GVFlashShowerParameterisation();
    virtual ~GVFlashShowerParameterisation();

    virtual void ComputeRadialParameters(G4double y, G4double Tau)       = 0;
    virtual void GenerateLongitudinalProfile(G4double Energy)            = 0; 
    virtual G4double IntegrateEneLongitudinal(G4double LongitudinalStep) = 0;
    virtual G4double IntegrateNspLongitudinal(G4double LongitudinalStep) = 0;
    virtual G4double ComputeTau(G4double LongitudinalPosition)           = 0;
    virtual G4double GenerateRadius(G4int ispot, G4double Energy,
                                    G4double LongitudinalPosition)       = 0; 
    virtual void ComputeLongitudinalParameters(G4double y)               = 0;
    virtual void GenerateEnergyProfile(G4double y)                       = 0;
    virtual void GenerateNSpotProfile(G4double y)                        = 0;
    virtual G4double GenerateExponential(G4double Energy)                = 0;

    virtual G4double GetAveR99() = 0;
    virtual G4double GetAveR90() = 0;

    virtual G4double GetAveTmx() = 0;
    virtual G4double GetAveT99() = 0; 
    virtual G4double GetAveT90() = 0; 

    virtual G4double GetNspot()  = 0;
    virtual G4double GetX0()     = 0;
    virtual G4double GetEc()     = 0;
    virtual G4double GetRm()     = 0;

    G4double GeneratePhi();
    G4double GetEffZ(const G4Material * material);
    G4double GetEffA(const G4Material * material);   
    G4double gam(G4double x, G4double a) const; // @@@@ gamma function
    void PrintMaterial(const G4Material * mat);

  protected:

    GVFlashHomoShowerTuning * thePar;
      // Parameterisation parameters
    G4double  density, A, Z, X0, Ec, Rm;
      // Medium related quantities
    G4double NSpot;
};

#endif
