Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/error_propagation/include/G4ErrorTrackLengthTarget.hh

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 25 //
 26 //
 27 //
 28 //
 29 // Class Description:
 30 //
 31 // G4ErrorTarget class: limits step when track length is bigger than
 32 // theMaximumTrackLength. It is a G4VDiscreteProcess: limits the step in
 33 // PostStepGetPhysicalInteractionLength().
 34 
 35 // History:
 36 // - Created. P. Arce, September 2004
 37 // --------------------------------------------------------------------
 38 
 39 #ifndef G4ErrorTrackLengthTarget_hh
 40 #define G4ErrorTrackLengthTarget_hh
 41 
 42 #include "G4ios.hh"
 43 #include "globals.hh"
 44 #include "G4VDiscreteProcess.hh"
 45 #include "G4PhysicsTable.hh"
 46 #include "G4PhysicsLogVector.hh"
 47 #include "G4ElementTable.hh"
 48 #include "G4Step.hh"
 49 #include "G4ErrorTarget.hh"
 50 
 51 //----------------------------------------------------------------------------
 52 
 53 class G4ErrorTrackLengthTarget
 54   : public G4VDiscreteProcess
 55   , public G4ErrorTarget
 56 {
 57  public:  // with description
 58   G4ErrorTrackLengthTarget(const G4double maxTrkLength);
 59   // Constructs and add this process to G4ProcessManager of all particles
 60   virtual ~G4ErrorTrackLengthTarget() {}
 61 
 62   // These methods are dummy, as the step limitation is done in the
 63   // PostStepGetPhysicalInteractionLength().
 64 
 65   virtual G4double GetDistanceFromPoint(const G4ThreeVector&,
 66                                         const G4ThreeVector&) const
 67   {
 68     return DBL_MAX;
 69   }
 70   virtual G4double GetDistanceFromPoint(const G4ThreeVector&) const
 71   {
 72     return DBL_MAX;
 73   }
 74 
 75   virtual G4double PostStepGetPhysicalInteractionLength(
 76     const G4Track& track, G4double previousStepSize,
 77     G4ForceCondition* condition);
 78   // Checks if the maximum track length has been reached
 79 
 80   virtual G4double GetMeanFreePath(const class G4Track& track, G4double,
 81                                    G4ForceCondition*);
 82   // Mean free path = theMaximumTrackLength - track.GetTrackLength()
 83 
 84   virtual G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
 85 
 86   virtual void Dump(const G4String& msg) const;
 87 
 88  private:
 89   G4double theMaximumTrackLength;
 90   G4VParticleChange theParticleChange;
 91 };
 92 
 93 #endif
 94