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1 // 1 //
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24 // ******************************************* 21 // ********************************************************************
25 // 22 //
26 // G4PhysicsLogVector <<
27 // 23 //
28 // Class description: << 24 // $Id: G4PhysicsLogVector.hh,v 1.10 2005/03/15 19:11:35 gcosmo Exp $
>> 25 // GEANT4 tag $Name: geant4-08-00 $
29 // 26 //
30 // A physics vector which has values of energy << 27 //
31 // and other physics values of a particle in m << 28 //--------------------------------------------------------------------
32 // range of energy, momentum, etc. The scale o << 29 // GEANT 4 class header file
33 // bins is logarithmic. << 30 //
34 << 31 // G4PhysicsLogVector.hh
35 // Authors: << 32 //
36 // - 02 Dec. 1995, G.Cosmo: Structure created << 33 // Class description:
37 // - 03 Mar. 1996, K.Amako: Implemented the 1s << 34 //
38 // Revisions: << 35 // A physics vector which has values of energy-loss, cross-section,
39 // - 11 Nov. 2000, H.Kurashige : Use STL vecto << 36 // and other physics values of a particle in matter in a given
40 // ------------------------------------------- << 37 // range of the energy, momentum, etc. The scale of energy/momentum
41 #ifndef G4PhysicsLogVector_hh << 38 // bins is in logarithmic.
42 #define G4PhysicsLogVector_hh 1 << 39
>> 40 // History:
>> 41 // 02 Dec. 1995, G.Cosmo : Structure created based on object model
>> 42 // 03 Mar. 1996, K.Amako : Implemented the 1st version
>> 43 // 27 Apr. 1996, K.Amako : Cache mechanism added
>> 44 // 01 Jul. 1996, K.Amako : Hidden bin from the user introduced
>> 45 // 26 Sep. 1996, K.Amako : Constructor with only 'bin size' added
>> 46 // 11 Nov. 2000, H.Kurashige : Use STL vector for dataVector and binVector
>> 47 //
>> 48 //--------------------------------------------------------------------
>> 49
>> 50 #ifndef G4PhysicsLogVector_h
>> 51 #define G4PhysicsLogVector_h 1
43 52
44 #include "G4PhysicsVector.hh" <<
45 #include "globals.hh" 53 #include "globals.hh"
>> 54 #include "G4PhysicsVector.hh"
46 55
47 class G4PhysicsLogVector : public G4PhysicsVec << 56 class G4PhysicsLogVector : public G4PhysicsVector
48 { 57 {
49 public: << 58 public:
50 // The vector will be filled from external f << 59
51 explicit G4PhysicsLogVector(G4bool spline = << 60 G4PhysicsLogVector();
>> 61 explicit G4PhysicsLogVector(size_t theNbin);
>> 62 // Constructors
>> 63
52 64
53 // Energies will be computed and filled at c << 65 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 66
59 ~G4PhysicsLogVector() override = default; << 67 G4PhysicsLogVector(G4double theEmin, G4double theEmax, size_t theNbin);
>> 68 // Because of logarithmic scale, note that 'theEmin' has to be
>> 69 // greater than zero. No protection exists against this error.
60 70
61 protected: << 71 ~G4PhysicsLogVector();
>> 72 // Destructor
>> 73
>> 74 G4bool Retrieve(std::ifstream& fIn, G4bool ascii);
>> 75 // To retrieve persistent data from file stream.
>> 76
>> 77 protected:
>> 78
>> 79 size_t FindBinLocation(G4double theEnergy) const;
>> 80 // Find bin# in which theEnergy belongs - pure virtual function
>> 81
>> 82 private:
>> 83
>> 84 G4double dBin; // Bin width - useful only for fixed binning
>> 85 G4double baseBin; // Set this in constructor for performance
62 86
63 void Initialise() final; <<
64 }; 87 };
>> 88
>> 89
>> 90 inline
>> 91 size_t G4PhysicsLogVector::FindBinLocation(G4double theEnergy) const
>> 92 {
>> 93 // For G4PhysicsLogVector, FindBinLocation is implemented using
>> 94 // a simple arithmetic calculation.
>> 95 //
>> 96 // Because this is a virtual function, it is accessed through a
>> 97 // pointer to the G4PhyiscsVector object for most usages. In this
>> 98 // case, 'inline' will not be invoked. However, there is a possibility
>> 99 // that the user access to the G4PhysicsLogVector object directly and
>> 100 // not through pointers or references. In this case, the 'inline' will
>> 101 // be invoked. (See R.B.Murray, "C++ Strategies and Tactics", Chap.6.6)
>> 102
>> 103 return size_t( std::log10(theEnergy)/dBin - baseBin );
>> 104 }
65 105
66 #endif 106 #endif
67 107