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>> 27 // $Id: G4SemiLogInterpolation.cc,v 1.8 2009/09/25 07:41:34 sincerti Exp $
>> 28 // GEANT4 tag $Name: geant4-09-03-patch-01 $
27 // 29 //
28 // Author: Maria Grazia Pia (Maria.Grazia.Pia@ 30 // Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
29 // 31 //
30 // History: 32 // History:
31 // ----------- 33 // -----------
32 // 31 Jul 2001 MGP Created 34 // 31 Jul 2001 MGP Created
33 // 35 //
34 // ------------------------------------------- 36 // -------------------------------------------------------------------
35 37
36 #include "G4SemiLogInterpolation.hh" 38 #include "G4SemiLogInterpolation.hh"
37 39
38 //....oooOO0OOooo........oooOO0OOooo........oo <<
39 // Constructor 40 // Constructor
>> 41
40 G4SemiLogInterpolation::G4SemiLogInterpolation 42 G4SemiLogInterpolation::G4SemiLogInterpolation()
41 { } 43 { }
42 44
43 45
44 //....oooOO0OOooo........oooOO0OOooo........oo <<
45 // Destructor 46 // Destructor
>> 47
46 G4SemiLogInterpolation::~G4SemiLogInterpolatio 48 G4SemiLogInterpolation::~G4SemiLogInterpolation()
47 { } 49 { }
48 50
49 //....oooOO0OOooo........oooOO0OOooo........oo <<
50 G4VDataSetAlgorithm* G4SemiLogInterpolation::C 51 G4VDataSetAlgorithm* G4SemiLogInterpolation::Clone() const
51 { return new G4SemiLogInterpolation; } 52 { return new G4SemiLogInterpolation; }
52 53
53 //....oooOO0OOooo........oooOO0OOooo........oo << 54
54 G4double G4SemiLogInterpolation::Calculate(G4d 55 G4double G4SemiLogInterpolation::Calculate(G4double x, G4int bin,
55 const G4DataVector& points, 56 const G4DataVector& points,
56 const G4DataVector& data) const 57 const G4DataVector& data) const
57 { 58 {
58 G4int nBins = G4int(data.size() - 1); << 59 //G4cout << "G4SemiLogInterpolation is performed(2 arguments) " << G4endl;
>> 60 G4int nBins = data.size() - 1;
59 G4double value = 0.; 61 G4double value = 0.;
60 if (x < points[0]) 62 if (x < points[0])
61 { 63 {
62 value = 0.; 64 value = 0.;
63 } 65 }
64 else if (bin < nBins) 66 else if (bin < nBins)
65 { 67 {
66 G4double e1 = points[bin]; 68 G4double e1 = points[bin];
67 G4double e2 = points[bin+1]; 69 G4double e2 = points[bin+1];
68 G4double d1 = data[bin]; 70 G4double d1 = data[bin];
69 G4double d2 = data[bin+1]; 71 G4double d2 = data[bin+1];
70 value = (d1*std::log10(e2/x) + d2*std::l 72 value = (d1*std::log10(e2/x) + d2*std::log10(x/e1)) / std::log10(e2/e1);
71 } 73 }
72 else 74 else
73 { 75 {
74 value = data[nBins]; 76 value = data[nBins];
75 } 77 }
76 return value; 78 return value;
77 } 79 }
78 80
79 //....oooOO0OOooo........oooOO0OOooo........oo <<
80 G4double G4SemiLogInterpolation::Calculate(G4d 81 G4double G4SemiLogInterpolation::Calculate(G4double x, G4int bin,
81 const G4DataVector& points, 82 const G4DataVector& points,
82 con 83 const G4DataVector& data,
83 con 84 const G4DataVector& log_points,
84 const G4DataVector& /*log_d 85 const G4DataVector& /*log_data*/) const
85 { 86 {
86 //A combination of logarithmic interpolation << 87 //A combination of logarithmic interpolation on energy set and
87 //linear Interpolation on data set << 88 //linear Interpolation on data set
88 //G4cout << "G4SemiLogInterpolation is perfo 89 //G4cout << "G4SemiLogInterpolation is performed (4 arguments)" << G4endl;
89 G4int nBins = G4int(data.size() - 1); << 90 G4int nBins = data.size() - 1;
90 G4double value = 0.; 91 G4double value = 0.;
91 G4double log_x = std::log10(x); 92 G4double log_x = std::log10(x);
92 if (x < points[0]) 93 if (x < points[0])
93 { 94 {
94 value = 0.; 95 value = 0.;
95 } 96 }
96 else if (bin < nBins) 97 else if (bin < nBins)
97 { 98 {
98 G4double e1 = points[bin]; 99 G4double e1 = points[bin];
99 G4double e2 = points[bin+1]; 100 G4double e2 = points[bin+1];
100 G4double d1 = data[bin]; 101 G4double d1 = data[bin];
101 G4double d2 = data[bin+1]; 102 G4double d2 = data[bin+1];
102 G4double log_e1 = log_points[bin]; 103 G4double log_e1 = log_points[bin];
103 G4double log_e2 = log_points[bin+1]; 104 G4double log_e2 = log_points[bin+1];
104 << 105 //G4double log_d1 = log_data[bin];
105 // Values log_e1 and log_e2 are the log << 106 //G4double log_d2 = log_data[bin+1];
106 // original energy actual values. Origin << 107 //G4cout << "x = " << x << " , log_x = " << log_x << " , bin = " << bin << G4endl;
107 // Simple linear interpolation performed << 108 //G4cout << "e1 = " << e1 << " , d1 = " << d1 << G4endl;
108 // should be equivalent to semi log-log << 109 //G4cout << "e2 = " << e2 << " , d2 = " << d2 << G4endl;
>> 110 // Values log_e1 and log_e2 are the log values of the corresponding
>> 111 // original energy actual values. Original d1 and d2 values are used.
>> 112 // Simple linear interpolation performed on loagarithmic data
>> 113 // should be equivalent to semi log-log interpolation
109 if (e1 == 0.0) log_e1 = -300; 114 if (e1 == 0.0) log_e1 = -300;
110 if (e2 == 0.0) log_e2 = -300; 115 if (e2 == 0.0) log_e2 = -300;
111 value = d1 + (d2 - d1)*(log_x - log_e1)/ 116 value = d1 + (d2 - d1)*(log_x - log_e1)/(log_e2 - log_e1);
>> 117 //G4cout << "G4SemiLogInterpolation - Final Interpolated Value: " << value << G4endl << G4endl;
112 } 118 }
113 else 119 else
114 { 120 {
115 value = data[nBins]; 121 value = data[nBins];
116 } 122 }
117 return value; 123 return value;
118 } 124 }
119 125
120 126