| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided 6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
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. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Sof 23 // * acceptance of all terms of the Geant4 Software license. *
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 //G4cout << "G4LinLogInterpolation is performed on dataset (2 arguments) " << G4endl;
55 G4int nBins = G4int(data.size() - 1); << 55 G4int nBins = data.size() - 1;
56 G4double value = 0.; 56 G4double value = 0.;
57 if (x < points[0]) 57 if (x < points[0])
58 { 58 {
59 value = 0.; 59 value = 0.;
60 } 60 }
61 else if (bin < nBins) 61 else if (bin < nBins)
62 { 62 {
63 G4double e1 = points[bin]; 63 G4double e1 = points[bin];
64 G4double e2 = points[bin+1]; 64 G4double e2 = points[bin+1];
65 G4double d1 = std::log(data[bin]); 65 G4double d1 = std::log(data[bin]);
66 G4double d2 = std::log(data[bin+1]); 66 G4double d2 = std::log(data[bin+1]);
67 value = G4Exp(d1 + (d2 - d1)*(x - e1)/ ( << 67 value = std::exp(d1 + (d2 - d1)*(x - e1)/ (e2 - e1));
68 } 68 }
69 else 69 else
70 { 70 {
71 value = data[nBins]; 71 value = data[nBins];
72 } 72 }
73 return value; 73 return value;
74 } 74 }
75 75
76 //....oooOO0OOooo........oooOO0OOooo........oo << 76 G4double G4LinLogInterpolation::Calculate(G4double x, G4int bin,
77 <<
78 G4double G4LinLogInterpolation::Calculate(G4do <<
79 const G4DataVector& points, 77 const G4DataVector& points,
80 cons 78 const G4DataVector& data,
81 cons << 79 const G4DataVector& /*log_points*/,
82 const G4DataVector& log_data) cons 80 const G4DataVector& log_data) const
83 { 81 {
84 //G4cout << "G4LinLogInterpolation is perfor 82 //G4cout << "G4LinLogInterpolation is performed on dataset (4 arguments) " << G4endl;
85 G4int nBins = G4int(data.size() - 1); << 83 G4int nBins = data.size() - 1;
86 G4double value = 0.; 84 G4double value = 0.;
87 //G4double log_x = std::log10(x); 85 //G4double log_x = std::log10(x);
88 if (x < points[0]) 86 if (x < points[0])
89 { 87 {
90 value = 0.; 88 value = 0.;
91 } 89 }
92 else if (bin < nBins) 90 else if (bin < nBins)
93 { 91 {
94 G4double e1 = points[bin]; 92 G4double e1 = points[bin];
95 G4double e2 = points[bin+1]; 93 G4double e2 = points[bin+1];
96 G4double d1 = data[bin]; 94 G4double d1 = data[bin];
97 G4double d2 = data[bin+1]; 95 G4double d2 = data[bin+1];
98 //G4double log_e1 = log_points[bin]; 96 //G4double log_e1 = log_points[bin];
99 //G4double log_e2 = log_points[bin+1]; 97 //G4double log_e2 = log_points[bin+1];
100 G4double log_d1 = log_data[bin]; 98 G4double log_d1 = log_data[bin];
101 G4double log_d2 = log_data[bin+1]; 99 G4double log_d2 = log_data[bin+1];
102 if (d1 > 0.0 && d2 > 0.0) 100 if (d1 > 0.0 && d2 > 0.0)
103 { 101 {
104 // Values e1, e2, d1 and d2 are the log va << 102 // Values e1, e2, d1 and d2 are the log values of the corresponding
105 // original energy and data values. << 103 // original energy and data values. Simple linear interpolation performed
106 // Simple linear interpolation performed << 104 // on loagarithmic data should be equivalent to log-log interpolation
107 // on logarithmic data should be equivalen <<
108 //value = log_d1 + (log_d2 - log_d1) 105 //value = log_d1 + (log_d2 - log_d1)*(log_x - log_e1)/(log_e2 - log_e1);
109 value = G4Exp(log_d1 + (log_d2 - log << 106 value = std::exp(log_d1 + (log_d2 - log_d1)*(x - e1)/(e2 - e1));
110 } 107 }
111 else 108 else
112 { 109 {
113 if (d1 == 0.0) log_d1 = -300; 110 if (d1 == 0.0) log_d1 = -300;
114 if (d2 == 0.0) log_d2 = -300; 111 if (d2 == 0.0) log_d2 = -300;
115 value = G4Exp(log_d1 + (log_d2 - log << 112 value = std::exp(log_d1 + (log_d2 - log_d1)*(x - e1)/(e2 - e1));
116 } 113 }
117 } 114 }
118 else 115 else
119 { 116 {
120 value = data[nBins]; 117 value = data[nBins];
121 } 118 }
122 return value; 119 return value;
123 } 120 }
>> 121
124 122