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// $Id$
//
// 
// ------------------------------------------------------------
//	GEANT 4 class header file 
//
//	History: first implementation, based on object model of
//	2nd December 1995, G.Cosmo
//	add G4VContinuousProcess(const G4String&) 24 Jul 1996, Hisaya kurashige
//
// Class Description
//  Abstract class which defines the public behavior of
//  Continuous physics interactions.
//
// ------------------------------------------------------------
//   New Physics scheme           18 Dec. 1996  H.Kurahige
// ------------------------------------------------------------
//   modified                     25 Feb. 1997  H.Kurahige
//   modified                     8 Mar.  1997 H.Kurashige
//   modified                     22 Mar.  1997 H.Kurashige
//   modified                     26 Mar.  1997 H.Kurashige
//   modified AlongStepGPIL etc.  17 Dec. 1997 H.Kurashige
//   fix bugs in GetGPILSelection() 24 Jan. 1998 H.Kurashige
//   modified for new ParticleChange 12 Mar. 1998  H.Kurashige

#ifndef G4VContinuousProcess_h
#define G4VContinuousProcess_h 1

#include "globals.hh"
#include "G4ios.hh"

#include "G4VProcess.hh"

class G4VContinuousProcess : public G4VProcess 
{
  //  Abstract class which defines the public behavior of
  //  Continuous physics interactions.
  public:     

      G4VContinuousProcess(const G4String& ,
			   G4ProcessType   aType = fNotDefined );
      G4VContinuousProcess(G4VContinuousProcess &);

      virtual ~G4VContinuousProcess();

  public:  // with description   
      virtual G4double AlongStepGetPhysicalInteractionLength(
                             const G4Track& track,
			     G4double  previousStepSize,
			     G4double  currentMinimumStep,
			     G4double& proposedSafety,
                             G4GPILSelection* selection
			    );

      virtual G4VParticleChange* AlongStepDoIt(
			     const G4Track& ,
			     const G4Step& 
			    );

     //  no operation in  AtRestDoIt and  PostStepDoIt
      virtual G4double PostStepGetPhysicalInteractionLength(
                             const G4Track&,
			     G4double,
			     G4ForceCondition* 
			    ){ return -1.0; };

      virtual G4double AtRestGetPhysicalInteractionLength(
                             const G4Track& ,
			     G4ForceCondition* 
			    ) { return -1.0; };

     //  no operation in  AtRestDoIt and PostStepDoIt
      virtual G4VParticleChange* AtRestDoIt(
			     const G4Track& ,
			     const G4Step&
			    ) {return 0;};

      virtual G4VParticleChange* PostStepDoIt(
			     const G4Track& ,
			     const G4Step& 
			    ) {return 0;};
 
  protected: // with description   
    virtual G4double GetContinuousStepLimit(const G4Track& aTrack,
                             G4double  previousStepSize,
                             G4double  currentMinimumStep,
			     G4double& currentSafety
                                                             )=0;
    // This pure virtual function is used to calculate step limit
    // for AlongStep in the derived processes  

  private:
    // this is the returnd value of  G4GPILSelection in 
    // the arguments of AlongStepGPIL()
    G4GPILSelection  valueGPILSelection;

  protected: // with description 
    // these two methods are set/get methods for valueGPILSelection
    void SetGPILSelection(G4GPILSelection selection)
    { valueGPILSelection = selection;};

    G4GPILSelection GetGPILSelection() const{return valueGPILSelection;};


  private:
  // hide default constructor and assignment operator as private 
      G4VContinuousProcess();
      G4VContinuousProcess & operator=(const G4VContinuousProcess &right);

};

#endif




