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25 // 25 //
26 // G4PhysicsLogVector <<
27 // 26 //
28 // Class description: << 27 // $Id: G4PhysicsLogVector.hh,v 1.15 2010-05-28 05:13:43 kurasige Exp $
>> 28 // GEANT4 tag $Name: geant4-09-04-patch-01 $
29 // 29 //
30 // A physics vector which has values of energy << 30 //
31 // and other physics values of a particle in m << 31 //--------------------------------------------------------------------
32 // range of energy, momentum, etc. The scale o << 32 // GEANT 4 class header file
33 // bins is logarithmic. << 33 //
34 << 34 // G4PhysicsLogVector.hh
35 // Authors: << 35 //
36 // - 02 Dec. 1995, G.Cosmo: Structure created << 36 // Class description:
37 // - 03 Mar. 1996, K.Amako: Implemented the 1s << 37 //
38 // Revisions: << 38 // A physics vector which has values of energy-loss, cross-section,
39 // - 11 Nov. 2000, H.Kurashige : Use STL vecto << 39 // and other physics values of a particle in matter in a given
40 // ------------------------------------------- << 40 // range of the energy, momentum, etc. The scale of energy/momentum
41 #ifndef G4PhysicsLogVector_hh << 41 // bins is in logarithmic.
42 #define G4PhysicsLogVector_hh 1 << 42
>> 43 // History:
>> 44 // 02 Dec. 1995, G.Cosmo : Structure created based on object model
>> 45 // 03 Mar. 1996, K.Amako : Implemented the 1st version
>> 46 // 27 Apr. 1996, K.Amako : Cache mechanism added
>> 47 // 01 Jul. 1996, K.Amako : Hidden bin from the user introduced
>> 48 // 26 Sep. 1996, K.Amako : Constructor with only 'bin size' added
>> 49 // 11 Nov. 2000, H.Kurashige : Use STL vector for dataVector and binVector
>> 50 //
>> 51 //--------------------------------------------------------------------
>> 52
>> 53 #ifndef G4PhysicsLogVector_h
>> 54 #define G4PhysicsLogVector_h 1
43 55
44 #include "G4PhysicsVector.hh" <<
45 #include "globals.hh" 56 #include "globals.hh"
>> 57 #include "G4PhysicsVector.hh"
46 58
47 class G4PhysicsLogVector : public G4PhysicsVec << 59 class G4PhysicsLogVector : public G4PhysicsVector
48 { 60 {
49 public: << 61 public:
50 // The vector will be filled from external f << 62
51 explicit G4PhysicsLogVector(G4bool spline = << 63 G4PhysicsLogVector();
>> 64 explicit G4PhysicsLogVector(size_t theNbin);
>> 65 // Constructors
>> 66
52 67
53 // Energies will be computed and filled at c << 68 public: // with description
54 // filled with zeros. Required Nbin > 1 and <<
55 // Use PutValue(..) to fill the data vector <<
56 explicit G4PhysicsLogVector(G4double Emin, G <<
57 G4bool spline = <<
58 69
59 ~G4PhysicsLogVector() override = default; << 70 G4PhysicsLogVector(G4double theEmin, G4double theEmax, size_t theNbin);
>> 71 // Because of logarithmic scale, note that 'theEmin' has to be
>> 72 // greater than zero. No protection exists against this error.
60 73
61 protected: << 74 ~G4PhysicsLogVector();
>> 75 // Destructor
>> 76
>> 77 G4PhysicsLogVector(const G4PhysicsLogVector&);
>> 78 G4PhysicsLogVector& operator=(const G4PhysicsLogVector&);
>> 79 // Copy constructor and assignment operator.
>> 80
>> 81 G4bool Retrieve(std::ifstream& fIn, G4bool ascii);
>> 82 // To retrieve persistent data from file stream.
>> 83
>> 84 protected:
>> 85
>> 86 size_t FindBinLocation(G4double theEnergy) const;
>> 87 // Find bin# in which theEnergy belongs - pure virtual function
>> 88
>> 89 private:
>> 90
>> 91 G4double dBin; // Bin width - useful only for fixed binning
>> 92 G4double baseBin; // Set this in constructor for performance
62 93
63 void Initialise() final; <<
64 }; 94 };
>> 95
>> 96
>> 97 inline
>> 98 size_t G4PhysicsLogVector::FindBinLocation(G4double theEnergy) const
>> 99 {
>> 100 // For G4PhysicsLogVector, FindBinLocation is implemented using
>> 101 // a simple arithmetic calculation.
>> 102 //
>> 103 // Because this is a virtual function, it is accessed through a
>> 104 // pointer to the G4PhyiscsVector object for most usages. In this
>> 105 // case, 'inline' will not be invoked. However, there is a possibility
>> 106 // that the user access to the G4PhysicsLogVector object directly and
>> 107 // not through pointers or references. In this case, the 'inline' will
>> 108 // be invoked. (See R.B.Murray, "C++ Strategies and Tactics", Chap.6.6)
>> 109
>> 110 return size_t( std::log10(theEnergy)/dBin - baseBin );
>> 111 }
65 112
66 #endif 113 #endif
67 114