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G4ImportanceProcess.hh
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27 // $Id$
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29 // ----------------------------------------------------------------------
30 // Class G4ImportanceProcess
31 //
32 // Class description:
33 //
34 // Used internally by importance sampling in the "mass" geometry.
35 // This process is a forced post step process. I will apply
36 // importance sampling if the particle crosses a boundary in the
37 // "mass" geometry.
38 
39 // Author: Michael Dressel (Michael.Dressel@cern.ch)
40 // ----------------------------------------------------------------------
41 #ifndef G4ImportanceProcess_hh
42 #define G4ImportanceProcess_hh G4ImportanceProcess_hh
43 
44 #include "G4VProcess.hh"
45 #include "G4VTrackTerminator.hh"
46 
47 class G4SamplingPostStepAction;
48 class G4VImportanceAlgorithm;
49 class G4VIStore;
50 
51 class G4Step;
52 class G4Navigator;
53 class G4TransportationManager;
54 class G4PathFinder;
55 class G4VTouchable;
56 
57 #include "G4FieldTrack.hh"
58 #include "G4TouchableHandle.hh"
59 
60 
61 class G4ImportanceProcess : public G4VProcess, public G4VTrackTerminator
62 {
63 
64 public: // with description
65 
66  G4ImportanceProcess(const G4VImportanceAlgorithm &aImportanceAlgorithm,
67  const G4VIStore &aIstore,
68  const G4VTrackTerminator *TrackTerminator,
69  const G4String &aName = "ImportanceProcess", G4bool para = false);
70  // creates a G4ParticleChange
71 
72  virtual ~G4ImportanceProcess();
73  // delete the G4ParticleChange
74 
75 
76  //--------------------------------------------------------------
77  // Set Paralle World
78  //--------------------------------------------------------------
79 
80  void SetParallelWorld(G4String parallelWorldName);
81  void SetParallelWorld(G4VPhysicalVolume* parallelWorld);
82 
83  //--------------------------------------------------------------
84  // Process interface
85  //--------------------------------------------------------------
86 
87  void StartTracking(G4Track*);
88 
89 
90  virtual G4double
91  PostStepGetPhysicalInteractionLength(const G4Track& aTrack,
92  G4double previousStepSize,
93  G4ForceCondition* condition);
94  // make process beeing forced
95  virtual G4VParticleChange *PostStepDoIt(const G4Track&, const G4Step&);
96  // manage the importance sampling in the "mass" geometry
97 
98  virtual void KillTrack() const;
99  // used in case no scoring process follows that does the killing
100 
101  virtual const G4String &GetName() const;
102 
103 
104 public: // without description
105 
106  // no operation in AtRestDoIt and AlongStepDoIt
107 
108  virtual G4double
109  AlongStepGetPhysicalInteractionLength(const G4Track&,
110  G4double ,
111  G4double ,
112  G4double& ,
113  G4GPILSelection*);
114  virtual G4double
115  AtRestGetPhysicalInteractionLength(const G4Track& ,
116  G4ForceCondition*);
117 
118  virtual G4VParticleChange*
119  AtRestDoIt(const G4Track&, const G4Step&);
120 
121 
122  virtual G4VParticleChange*
123  AlongStepDoIt(const G4Track&, const G4Step&);
124 
125 private:
126 
127  G4ImportanceProcess(const G4ImportanceProcess &);
128  G4ImportanceProcess &operator=(const G4ImportanceProcess &);
129 
130 private:
131 
132  void CopyStep(const G4Step & step);
133 
134  G4Step * fGhostStep;
135  G4StepPoint * fGhostPreStepPoint;
136  G4StepPoint * fGhostPostStepPoint;
137 
138  G4ParticleChange *fParticleChange;
139  const G4VImportanceAlgorithm &fImportanceAlgorithm;
140  const G4VIStore &fIStore;
141  G4SamplingPostStepAction *fPostStepAction;
142 
143  G4TransportationManager* fTransportationManager;
144  G4PathFinder* fPathFinder;
145 
146  // -------------------------------
147  // Navigation in the Ghost World:
148  // -------------------------------
149  G4String fGhostWorldName;
150  G4VPhysicalVolume* fGhostWorld;
151  G4Navigator* fGhostNavigator;
152  G4int fNavigatorID;
153  G4TouchableHandle fOldGhostTouchable;
154  G4TouchableHandle fNewGhostTouchable;
155  G4FieldTrack fFieldTrack;
156  G4double fGhostSafety;
157  G4bool fOnBoundary;
158 
159  G4bool paraflag;
160 
161 };
162 
163 #endif
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