G4VDiscreteProcess.hh

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// G4VDiscreteProcess
//
// Class description:
//
// Abstract class which defines the public behavior of
// discrete physics interactions.
 
// Authors:
// - 2 December 1995, G.Cosmo - First implementation, based on object model
// - 18 December 1996, H.Kurashige - New Physics scheme
// --------------------------------------------------------------------
#ifndef G4VDiscreteProcess_hh
#define G4VDiscreteProcess_hh 1
 
#include "globals.hh"
#include "G4ios.hh"
 
#include "G4VProcess.hh"
 
class G4VDiscreteProcess : public G4VProcess 
{
  public:     
 
    G4VDiscreteProcess(const G4String& aName,
                       G4ProcessType aType = fNotDefined );
    G4VDiscreteProcess(G4VDiscreteProcess&);
 
    virtual ~G4VDiscreteProcess();
 
    G4VDiscreteProcess& operator=(const G4VDiscreteProcess&) = delete;
 
    virtual G4double PostStepGetPhysicalInteractionLength(
                             const G4Track& track,
                             G4double previousStepSize,
                             G4ForceCondition* condition
                            );
 
    virtual G4VParticleChange* PostStepDoIt(
                             const G4Track& ,
                             const G4Step& 
                            );
 
    // No operation in AtRestDoIt and AlongStepDoIt
    //
    virtual G4double AlongStepGetPhysicalInteractionLength(
                             const G4Track&,
                             G4double  ,
                             G4double  ,
                             G4double& ,
                             G4GPILSelection*
                            ) { return -1.0; }
 
    virtual G4double AtRestGetPhysicalInteractionLength(
                             const G4Track& ,
                             G4ForceCondition* 
                            ) { return -1.0; }
 
    // No operation in AtRestDoIt and AlongStepDoIt
    //
    virtual G4VParticleChange* AtRestDoIt(
                             const G4Track& ,
                             const G4Step&
                            ) { return nullptr; }
 
    virtual G4VParticleChange* AlongStepDoIt(
                             const G4Track& ,
                             const G4Step& 
                            ) { return nullptr; }
 
    // cross section in the unit of inverse length as a 
    // function of kinetic energy 
    virtual G4double GetCrossSection(
                             const G4double,
                             const G4MaterialCutsCouple*
                            ) { return 0.0; }
 
    // minimal energy for non-zero cross section
    virtual G4double MinPrimaryEnergy(
                             const G4ParticleDefinition*,
                             const G4Material*
                            ) { return 0.0; }
 
  protected:
 
    virtual G4double GetMeanFreePath( const G4Track& aTrack,
                                      G4double previousStepSize,
                                      G4ForceCondition* condition ) = 0;
      // Calculates from the macroscopic cross-section a mean
      // free path, the value is returned in units of distance
 
  private:
 
    G4VDiscreteProcess();
      // Hidden default constructor
};
 
#endif