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1 // 1 //
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18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // 26 //
27 // 27 //
28 // Author: Vladimir Ivanchenko (Vladimir.Ivan 28 // Author: Vladimir Ivanchenko (Vladimir.Ivantchenko@cern.ch)
29 // 29 //
30 // History: 30 // History:
31 // ----------- 31 // -----------
32 // 27 May 2002 VI Created 32 // 27 May 2002 VI Created
33 // 33 //
34 // ------------------------------------------- 34 // -------------------------------------------------------------------
35 35
36 #include "G4LinLogInterpolation.hh" 36 #include "G4LinLogInterpolation.hh"
37 #include "G4Exp.hh" <<
38 37
39 //....oooOO0OOooo........oooOO0OOooo........oo <<
40 // Constructor 38 // Constructor
>> 39
41 G4LinLogInterpolation::G4LinLogInterpolation() 40 G4LinLogInterpolation::G4LinLogInterpolation()
42 { } 41 { }
43 42
44 //....oooOO0OOooo........oooOO0OOooo........oo << 43
45 // Destructor 44 // Destructor
>> 45
46 G4LinLogInterpolation::~G4LinLogInterpolation( 46 G4LinLogInterpolation::~G4LinLogInterpolation()
47 { } 47 { }
48 48
49 //....oooOO0OOooo........oooOO0OOooo........oo << 49
50 G4double G4LinLogInterpolation::Calculate(G4do << 50 G4double G4LinLogInterpolation::Calculate(G4double x, G4int bin,
51 const G4DataVector& points, << 51 const G4DataVector& points,
52 const G4DataVector& data) const 52 const G4DataVector& data) const
53 { 53 {
54 //G4cout << "G4LinLogInterpolation is perfor << 54 G4int nBins = data.size() - 1;
55 G4int nBins = G4int(data.size() - 1); <<
56 G4double value = 0.; 55 G4double value = 0.;
57 if (x < points[0]) 56 if (x < points[0])
58 { 57 {
59 value = 0.; 58 value = 0.;
60 } 59 }
61 else if (bin < nBins) 60 else if (bin < nBins)
62 { 61 {
63 G4double e1 = points[bin]; 62 G4double e1 = points[bin];
64 G4double e2 = points[bin+1]; 63 G4double e2 = points[bin+1];
65 G4double d1 = std::log(data[bin]); 64 G4double d1 = std::log(data[bin]);
66 G4double d2 = std::log(data[bin+1]); 65 G4double d2 = std::log(data[bin+1]);
67 value = G4Exp(d1 + (d2 - d1)*(x - e1)/ ( << 66 value = std::exp(d1 + (d2 - d1)*(x - e1)/ (e2 - e1));
68 } 67 }
69 else 68 else
70 { 69 {
71 value = data[nBins]; 70 value = data[nBins];
72 } 71 }
73 return value; <<
74 } <<
75 <<
76 //....oooOO0OOooo........oooOO0OOooo........oo <<
77 <<
78 G4double G4LinLogInterpolation::Calculate(G4do <<
79 const G4DataVector& points, <<
80 cons <<
81 cons <<
82 const G4DataVector& log_data) cons <<
83 { <<
84 //G4cout << "G4LinLogInterpolation is perfor <<
85 G4int nBins = G4int(data.size() - 1); <<
86 G4double value = 0.; <<
87 //G4double log_x = std::log10(x); <<
88 if (x < points[0]) <<
89 { <<
90 value = 0.; <<
91 } <<
92 else if (bin < nBins) <<
93 { <<
94 G4double e1 = points[bin]; <<
95 G4double e2 = points[bin+1]; <<
96 G4double d1 = data[bin]; <<
97 G4double d2 = data[bin+1]; <<
98 //G4double log_e1 = log_points[bin]; <<
99 //G4double log_e2 = log_points[bin+1]; <<
100 G4double log_d1 = log_data[bin]; <<
101 G4double log_d2 = log_data[bin+1]; <<
102 if (d1 > 0.0 && d2 > 0.0) <<
103 { <<
104 // Values e1, e2, d1 and d2 are the log va <<
105 // original energy and data values. <<
106 // Simple linear interpolation performed <<
107 // on logarithmic data should be equivalen <<
108 //value = log_d1 + (log_d2 - log_d1) <<
109 value = G4Exp(log_d1 + (log_d2 - log <<
110 } <<
111 else <<
112 { <<
113 if (d1 == 0.0) log_d1 = -300; <<
114 if (d2 == 0.0) log_d2 = -300; <<
115 value = G4Exp(log_d1 + (log_d2 - log <<
116 } <<
117 } <<
118 else <<
119 { <<
120 value = data[nBins]; <<
121 } <<
122 return value; 72 return value;
123 } 73 }
124 74