source: trunk/source/geometry/magneticfield/test/NTST/include/NTSTLooperDeath.hh

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//
// -- Bogus -- BaBar Object-Oriented Geant-based Unified Simulation
//
// BgsLooperDeath
//
// Description:
//   This is a simple GEANT4 process that destroys any particle below
//   the specified total kinetic energy that reverse direction (loops 180
//   degress) in the x/y plane.
//
//   Based on BgsChargedLowEnergyDeath
//
// Author List:
//   David Williams
//
// Modification History:
//
//-----------------------------------------------------------------------------
#ifndef NTSTlooperDeath_hh
#define NTSTLooperDeath_hh 1

#include "globals.hh"
#include "G4VProcess.hh"

class NTSTLooperDeath : public G4VProcess
{
public:
  
  NTSTLooperDeath( G4double theMinMomentum=5*MeV,
                   const char* name="NTSTLoopDeath",
                   G4ProcessType type=fUserDefined );

  ~NTSTLooperDeath();
        
        
  //
  // Derived methods
  //
  virtual G4double
  PostStepGetPhysicalInteractionLength( const G4Track& track,
                                        G4double   previousStepSize,
                                        G4ForceCondition* condition );

  virtual G4VParticleChange* PostStepDoIt( const G4Track &track,
                                           const G4Step &step );

  virtual G4double
  AlongStepGetPhysicalInteractionLength( const G4Track&,
                                         G4double  , // previousStepSize,
                                         G4double  , // currentMinimumStep,
                                         G4double& , // currentSafety,
                                         G4GPILSelection* ) // selection )
    { return -1.0; }

  virtual G4VParticleChange* AlongStepDoIt( const G4Track & , // track,
                                            const G4Step & ) // step
    { return 0; }
 
  virtual G4double
  AtRestGetPhysicalInteractionLength( const G4Track &,          // track,
                                      G4ForceCondition * )      // force )
    { return -1.0; }

  virtual G4VParticleChange*
  AtRestDoIt( const G4Track &, const G4Step & )     // track, step )
    { return 0; }


  virtual G4bool IsApplicable( const G4ParticleDefinition &particle )
    { return (particle.GetPDGCharge() != 0); }
        
  //
  // Accessors
  //
  void SetMinMomentum( G4double theMinMomentum )
    { minMomentum = theMinMomentum; }
  G4double GetMinMomentum() const
    { return minMomentum; }

protected:
  
  G4double minMomentum; 
};

#endif