include/Geant4/G4ErrorTrackLengthTarget.hh

0001 //
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0025 //
0026 //
0027 //
0028 //
0029 // Class Description:
0030 //
0031 // G4ErrorTarget class: limits step when track length is bigger than
0032 // theMaximumTrackLength. It is a G4VDiscreteProcess: limits the step in
0033 // PostStepGetPhysicalInteractionLength().
0034
0035 // History:
0036 // - Created. P. Arce, September 2004
0037 // --------------------------------------------------------------------
0038
0039 #ifndef G4ErrorTrackLengthTarget_hh
0040 #define G4ErrorTrackLengthTarget_hh
0041
0042 #include "G4ios.hh"
0043 #include "globals.hh"
0044 #include "G4VDiscreteProcess.hh"
0045 #include "G4PhysicsTable.hh"
0046 #include "G4PhysicsLogVector.hh"
0047 #include "G4ElementTable.hh"
0048 #include "G4Step.hh"
0049 #include "G4ErrorTarget.hh"
0050
0051 //----------------------------------------------------------------------------
0052
0053 class G4ErrorTrackLengthTarget
0054   : public G4VDiscreteProcess
0055   , public G4ErrorTarget
0056 {
0057  public:  // with description
0058   G4ErrorTrackLengthTarget(const G4double maxTrkLength);
0059   // Constructs and add this process to G4ProcessManager of all particles
0060   virtual ~G4ErrorTrackLengthTarget() {}
0061
0062   // These methods are dummy, as the step limitation is done in the
0063   // PostStepGetPhysicalInteractionLength().
0064
0065   virtual G4double GetDistanceFromPoint(const G4ThreeVector&,
0066                                         const G4ThreeVector&) const
0067   {
0068     return DBL_MAX;
0069   }
0070   virtual G4double GetDistanceFromPoint(const G4ThreeVector&) const
0071   {
0072     return DBL_MAX;
0073   }
0074
0075   virtual G4double PostStepGetPhysicalInteractionLength(
0076     const G4Track& track, G4double previousStepSize,
0077     G4ForceCondition* condition);
0078   // Checks if the maximum track length has been reached
0079
0080   virtual G4double GetMeanFreePath(const class G4Track& track, G4double,
0081                                    G4ForceCondition*);
0082   // Mean free path = theMaximumTrackLength - track.GetTrackLength()
0083
0084   virtual G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
0085
0086   virtual void Dump(const G4String& msg) const;
0087
0088  private:
0089   G4double theMaximumTrackLength;
0090   G4VParticleChange theParticleChange;
0091 };
0092
0093 #endif