Geant4  10.01.p02
G4LogLogInterpolator.cc
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27 // $Id: G4LogLogInterpolator.cc 70904 2013-06-07 10:34:25Z gcosmo $
28 //
29 // Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
30 //
31 // History:
32 // -----------
33 // 31 Jul 2001 MGP Created
34 // 31 Jul 2008 MGP Revised and renamed to G4LogLogInterpolator
35 //
36 // -------------------------------------------------------------------
37 
38 #include "G4LogLogInterpolator.hh"
39 
40 // Constructor
41 
43 { }
44 
45 // Destructor
46 
48 { }
49 
51 { return new G4LogLogInterpolator; }
52 
53 
55  const G4DataVector& points,
56  const G4DataVector& data) const
57 {
58  G4int nBins = data.size() - 1;
59  // ---- MGP ---- To be verified; value = 0. is redundant here
60  G4double value = 0.;
61  if (x < points[0] || x == 0.)
62  {
63  value = 0;
64  }
65  else if (bin < nBins)
66  {
67  G4double e1 = points[bin];
68  G4double e2 = points[bin+1];
69  G4double d1 = data[bin];
70  G4double d2 = data[bin+1];
71 
72  if (d1 != 0. && d2 != 0.)
73  {
74  value = (std::log10(d1)*std::log10(e2/x) + std::log10(d2)*std::log10(x/e1)) / std::log10(e2/e1);
75  value = std::pow(10.,value);
76  }
77  else
78  {
79  value = 0.;
80  }
81  }
82  else
83  {
84  value = data[nBins];
85  }
86 
87  return value;
88 }
static const G4double d1
static const G4double e2
int G4int
Definition: G4Types.hh:78
virtual G4IInterpolator * Clone() const
static const G4double e1
G4double Calculate(G4double point, G4int bin, const G4DataVector &energies, const G4DataVector &data) const
double G4double
Definition: G4Types.hh:76
static const G4double d2