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25 // 25 //
26 // G4ParticleChangeForMSC 26 // G4ParticleChangeForMSC
27 // 27 //
28 // Class description: 28 // Class description:
29 // 29 //
30 // Concrete "Particle Change" class for Multip 30 // Concrete "Particle Change" class for Multiple Scattering process.
31 31
32 // Author: Hisaya Kurashige, 23 March 1998 32 // Author: Hisaya Kurashige, 23 March 1998
33 // Revision: Vladimir Ivantchenko, 16 January 33 // Revision: Vladimir Ivantchenko, 16 January 2004
34 // 23 August 2 <<
35 // ------------------------------------------- 34 // --------------------------------------------------------------------
36 #ifndef G4ParticleChangeForMSC_hh 35 #ifndef G4ParticleChangeForMSC_hh
37 #define G4ParticleChangeForMSC_hh 1 36 #define G4ParticleChangeForMSC_hh 1
38 37
39 #include "globals.hh" 38 #include "globals.hh"
40 #include "G4ios.hh" 39 #include "G4ios.hh"
41 #include "G4ThreeVector.hh" 40 #include "G4ThreeVector.hh"
>> 41 #include "G4ThreeVector.hh"
42 #include "G4VParticleChange.hh" 42 #include "G4VParticleChange.hh"
43 43
44 class G4ParticleChangeForMSC final : public G4 << 44 class G4DynamicParticle;
>> 45
>> 46 class G4ParticleChangeForMSC : public G4VParticleChange
45 { 47 {
46 public: << 48 public:
47 49
48 G4ParticleChangeForMSC(); << 50 G4ParticleChangeForMSC();
>> 51 // Default constructor
49 52
50 ~G4ParticleChangeForMSC() override = default << 53 virtual ~G4ParticleChangeForMSC();
>> 54 // Destructor
51 55
52 G4ParticleChangeForMSC(const G4ParticleChang << 56 // --- the following methods are for updating G4Step -----
53 G4ParticleChangeForMSC& operator= << 57 // Return the pointer to the G4Step after updating the Step information
54 (const G4ParticleChangeForMSC& right) = dele << 58 // by using final state information of the track given by a physics
>> 59 // process
55 60
56 // A multiple scattering process gives the f << 61 virtual G4Step* UpdateStepForAlongStep(G4Step* Step);
57 G4Step* UpdateStepForAlongStep(G4Step* step) << 62 virtual G4Step* UpdateStepForPostStep(G4Step* Step);
>> 63 // A physics process gives the final state of the particle
>> 64 // based on information of G4Track (or equivalently the PreStepPoint)
58 65
59 // Initialise only properties changed by mul << 66 virtual void Initialize(const G4Track&);
60 inline void InitialiseMSC(const G4Track&, co << 67 // Initialize all properties by using G4Track information
61 68
62 inline void ProposeMomentumDirection(const G << 69 // --- methods to keep information of the final state ---
63 inline const G4ThreeVector* GetProposedMomen << 70 // IMPORTANT NOTE: despite the name, what the class stores through its
>> 71 // methods are the "FINAL" values of the Position,
>> 72 // Momentum, etc.
64 73
65 inline void ProposePosition(const G4ThreeVec << 74 void ProposeMomentumDirection(const G4ThreeVector& Pfinal);
66 inline const G4ThreeVector& GetProposedPosit << 75 void ProposeMomentumDirection(G4double Px, G4double Py, G4double Pz);
>> 76 const G4ThreeVector* GetMomentumDirection() const;
>> 77 const G4ThreeVector* GetProposedMomentumDirection() const;
>> 78 void SetProposedMomentumDirection(const G4ThreeVector& Pfinal);
>> 79 // Get/Set theMomentumDirectionChange vector: it is the final momentum
>> 80 // direction
67 81
68 private: << 82 const G4ThreeVector* GetPosition() const;
>> 83 void ProposePosition(const G4ThreeVector& finalPosition);
>> 84 const G4ThreeVector* GetProposedPosition() const;
>> 85 void SetProposedPosition(const G4ThreeVector& finalPosition);
>> 86 // Get/Set the final position of the current particle
69 87
70 G4ThreeVector theMomentumDirection; << 88 // --- Dump and debug methods ---
71 // It is the vector containing the final mom <<
72 // after multiple scattering is applied alon <<
73 89
74 G4ThreeVector thePosition; << 90 virtual void DumpInfo() const;
75 // The changed of post step position after m <<
76 }; <<
77 91
78 inline void G4ParticleChangeForMSC::ProposeMom << 92 virtual G4bool CheckIt(const G4Track&);
79 const G4ThreeVector& P) <<
80 { <<
81 theMomentumDirection = P; <<
82 } <<
83 93
84 inline const G4ThreeVector* << 94 protected:
85 G4ParticleChangeForMSC::GetProposedMomentumDir <<
86 { <<
87 return &theMomentumDirection; <<
88 } <<
89 95
90 inline void G4ParticleChangeForMSC::ProposePos << 96 G4ParticleChangeForMSC(const G4ParticleChangeForMSC& right);
91 { << 97 G4ParticleChangeForMSC& operator=(const G4ParticleChangeForMSC& right);
92 thePosition = P; << 98 // Hidden copy constructor and assignment operator
93 } <<
94 99
95 inline const G4ThreeVector& G4ParticleChangeFo << 100 private:
96 { <<
97 return thePosition; <<
98 } <<
99 101
100 inline void << 102 G4ThreeVector theMomentumDirection;
101 G4ParticleChangeForMSC::InitialiseMSC(const G4 << 103 // It is the vector containing the final momentum direction
102 { << 104 // after the invoked process. The application of the change
103 theStatusChange = track.GetTrackStatus(); << 105 // of the momentum direction of the particle is not done here.
104 auto poststep = step.GetPostStepPoint(); << 106 // The responsibility to apply the change is up the entity
105 thePosition = poststep->GetPosition(); << 107 // which invoked the process
106 theMomentumDirection = poststep->GetMomentum << 108
107 theCurrentTrack = &track; << 109 G4ThreeVector thePosition;
108 } << 110 // The changed (final) position of a given particle
>> 111 };
>> 112
>> 113 #include "G4ParticleChangeForMSC.icc"
109 114
110 #endif 115 #endif
111 116