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25 // 25 //
26 // 26 //
>> 27 // $Id: G4LogLogInterpolation.cc,v 1.7 2006/06/29 19:40:09 gunter Exp $
>> 28 // GEANT4 tag $Name: geant4-08-01-patch-01 $
27 // 29 //
28 // Author: Maria Grazia Pia (Maria.Grazia.Pia@ 30 // Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
29 // Sebastian Incerti (incerti@cenbg.in << 31 //
30 // Nicolas A. Karakatsanis (knicolas@m <<
31 // History: 32 // History:
32 // ----------- 33 // -----------
33 // 31 Jul 2001 MGP Created 34 // 31 Jul 2001 MGP Created
34 // 27 Jun 2008 SI Add check to avoid << 35 //
35 // 08 Dec 2008 NAK Log-Log interpolat <<
36 // self-test functi <<
37 // 14 Jun 2008 NAK New implementation <<
38 // after directly lo <<
39 // logarithmic value <<
40 // ------------------------------------------- 36 // -------------------------------------------------------------------
41 37
42 #include "G4LogLogInterpolation.hh" 38 #include "G4LogLogInterpolation.hh"
43 39
44 //....oooOO0OOooo........oooOO0OOooo........oo <<
45 // Constructor 40 // Constructor
>> 41
46 G4LogLogInterpolation::G4LogLogInterpolation() 42 G4LogLogInterpolation::G4LogLogInterpolation()
47 { } 43 { }
48 44
49 //....oooOO0OOooo........oooOO0OOooo........oo <<
50 // Destructor 45 // Destructor
>> 46
51 G4LogLogInterpolation::~G4LogLogInterpolation( 47 G4LogLogInterpolation::~G4LogLogInterpolation()
52 { } 48 { }
53 49
54 //....oooOO0OOooo........oooOO0OOooo........oo <<
55 G4VDataSetAlgorithm* G4LogLogInterpolation::Cl 50 G4VDataSetAlgorithm* G4LogLogInterpolation::Clone() const
56 { return new G4LogLogInterpolation; } 51 { return new G4LogLogInterpolation; }
57 52
58 //....oooOO0OOooo........oooOO0OOooo........oo << 53
59 G4double G4LogLogInterpolation::Calculate(G4do 54 G4double G4LogLogInterpolation::Calculate(G4double x, G4int bin,
60 const G4DataVector& points, 55 const G4DataVector& points,
61 const G4DataVector& data) const 56 const G4DataVector& data) const
62 { 57 {
63 G4int nBins = G4int(data.size() - 1); << 58 G4int nBins = data.size() - 1;
64 G4double value = 0.; 59 G4double value = 0.;
65 if (x < points[0]) 60 if (x < points[0])
66 { 61 {
67 value = 0.; 62 value = 0.;
68 } 63 }
69 else if (bin < nBins) 64 else if (bin < nBins)
70 { 65 {
71 G4double e1 = points[bin]; 66 G4double e1 = points[bin];
72 G4double e2 = points[bin+1]; 67 G4double e2 = points[bin+1];
73 G4double d1 = data[bin]; 68 G4double d1 = data[bin];
74 G4double d2 = data[bin+1]; 69 G4double d2 = data[bin+1];
75 // Check of e1, e2, d1 and d2 values to << 70 value = (std::log10(d1)*std::log10(e2/x) + std::log10(d2)*std::log10(x/e1)) / std::log10(e2/e1);
76 // interpolated value below << 71 value = std::pow(10.,value);
77 if ((d1 > 0.) && (d2 > 0.) && (e1 > 0.) <<
78 { <<
79 <<
80 value = std::log10(d1)+(std::log10(d2/d1)/ <<
81 value = std::pow(10.,value); <<
82 } <<
83 else value = 0.; <<
84 } 72 }
85 else 73 else
86 { 74 {
87 value = data[nBins]; 75 value = data[nBins];
88 } 76 }
89 return value; <<
90 } <<
91 <<
92 //....oooOO0OOooo........oooOO0OOooo........oo <<
93 // Nicolas A. Karakatsanis: New implementation <<
94 // logarithmic values <<
95 G4double G4LogLogInterpolation::Calculate(G4do <<
96 const G4DataVector& points, <<
97 cons <<
98 cons <<
99 const G4DataVector& log_data) cons <<
100 { <<
101 G4int nBins = G4int(data.size() - 1); <<
102 G4double value = 0.; <<
103 G4double log_x = std::log10(x); <<
104 if (x < points[0]) <<
105 { <<
106 value = 0.; <<
107 } <<
108 else if (bin < nBins) <<
109 { <<
110 G4double log_e1 = log_points[bin]; <<
111 G4double log_e2 = log_points[bin+1]; <<
112 G4double log_d1 = log_data[bin]; <<
113 G4double log_d2 = log_data[bin+1]; <<
114 <<
115 // Values e1, e2, d1 and d2 are the log <<
116 // original energy and data values. Simp <<
117 // on loagarithmic data should be equiva <<
118 value = log_d1 + (log_d2 - log_d1)*(log_ <<
119 77
120 // Delogarithmize to obtain interpolated <<
121 value = std::pow(10.,value); <<
122 } <<
123 else <<
124 { <<
125 value = data[nBins]; <<
126 } <<
127 return value; 78 return value;
128 } 79 }
129 80