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//
// $Id: Em5StepCut.hh,v 1.5 2001/10/16 11:56:28 maire Exp $
// GEANT4 tag $Name: geant4-05-00 $
//

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#ifndef Em5StepCut_h
#define Em5StepCut_h 1

#include "globals.hh"
#include "G4VDiscreteProcess.hh"
#include "G4Step.hh"

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class Em5StepCut : public G4VDiscreteProcess
{
  public:     

     Em5StepCut(const G4String& processName ="UserStepCut" )
         : G4VDiscreteProcess(processName),MaxChargedStep(DBL_MAX) {};

    ~Em5StepCut() {};
    
     void SetMaxStep(G4double step) {MaxChargedStep = step;};
     
     G4double PostStepGetPhysicalInteractionLength(
                             const G4Track& track,
			     G4double   previousStepSize,
			     G4ForceCondition* condition
			    );

     G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);

     G4double GetMeanFreePath(const G4Track& aTrack,
                             G4double   previousStepSize,
                             G4ForceCondition* condition
                            ) {return 0.;};     // it is not needed here !

  private:

     G4double MaxChargedStep;
};

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//
// inlined function members implementation

inline G4double Em5StepCut::PostStepGetPhysicalInteractionLength(
                             const G4Track& aTrack,
                             G4double   previousStepSize,
                             G4ForceCondition* condition )
{
  // condition is set to "Not Forced"
  *condition = NotForced;
  
  G4double ProposedStep = DBL_MAX;

  if((MaxChargedStep > 0.) &&
     (aTrack.GetVolume() != NULL) &&
     (aTrack.GetVolume()->GetName() == "Absorber") &&
     (aTrack.GetDynamicParticle()->GetDefinition()->GetPDGCharge() != 0.))
     ProposedStep = MaxChargedStep;

  return ProposedStep;
}

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inline G4VParticleChange* Em5StepCut::PostStepDoIt(const G4Track& aTrack,
                                                   const G4Step&        )
{
   // do nothing
   aParticleChange.Initialize(aTrack);
   return &aParticleChange;
}

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#endif