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19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
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25 // 25 //
26 // 26 //
>> 27 // $Id: G4LogLogInterpolator.cc,v 1.2 2010-11-19 17:16:21 pia Exp $
>> 28 // GEANT4 tag $Name: not supported by cvs2svn $
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 // 31 Jul 2008 MGP Revised and rename 35 // 31 Jul 2008 MGP Revised and renamed to G4LogLogInterpolator
34 // 36 //
35 // ------------------------------------------- 37 // -------------------------------------------------------------------
36 38
37 #include "G4LogLogInterpolator.hh" 39 #include "G4LogLogInterpolator.hh"
38 40
39 // Constructor 41 // Constructor
40 42
41 G4LogLogInterpolator::G4LogLogInterpolator() 43 G4LogLogInterpolator::G4LogLogInterpolator()
42 { } 44 { }
43 45
44 // Destructor 46 // Destructor
45 47
46 G4LogLogInterpolator::~G4LogLogInterpolator() 48 G4LogLogInterpolator::~G4LogLogInterpolator()
47 { } 49 { }
48 50
49 G4IInterpolator* G4LogLogInterpolator::Clone() 51 G4IInterpolator* G4LogLogInterpolator::Clone() const
50 { return new G4LogLogInterpolator; } 52 { return new G4LogLogInterpolator; }
51 53
52 54
53 G4double G4LogLogInterpolator::Calculate(G4dou 55 G4double G4LogLogInterpolator::Calculate(G4double x, G4int bin,
54 const G4DataVector& points, 56 const G4DataVector& points,
55 const G4DataVector& data) const 57 const G4DataVector& data) const
56 { 58 {
57 G4int nBins = G4int(data.size() - 1); << 59 G4int nBins = data.size() - 1;
58 // ---- MGP ---- To be verified; value = 0. 60 // ---- MGP ---- To be verified; value = 0. is redundant here
59 G4double value = 0.; 61 G4double value = 0.;
60 if (x < points[0] || x == 0.) 62 if (x < points[0] || x == 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 72
71 if (d1 != 0. && d2 != 0.) 73 if (d1 != 0. && d2 != 0.)
72 { 74 {
73 value = (std::log10(d1)*std::log10(e2/x) + 75 value = (std::log10(d1)*std::log10(e2/x) + std::log10(d2)*std::log10(x/e1)) / std::log10(e2/e1);
74 value = std::pow(10.,value); 76 value = std::pow(10.,value);
75 } 77 }
76 else 78 else
77 { 79 {
78 value = 0.; 80 value = 0.;
79 } 81 }
80 } 82 }
81 else 83 else
82 { 84 {
83 value = data[nBins]; 85 value = data[nBins];
84 } 86 }
85 87
86 return value; 88 return value;
87 } 89 }
88 90