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G4LinInterpolator.cc
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1 //
2 // ********************************************************************
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15 // * use. Please see the license in the file LICENSE and URL above *
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18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
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24 // ********************************************************************
25 //
26 //
27 //
28 // Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
29 //
30 // History:
31 // -----------
32 // 31 Jul 2001 MGP Created
33 // 31 Jul 2008 MGP Revised and renamed to G4LinInterpolator
34 //
35 // -------------------------------------------------------------------
36 
37 #include "G4LinInterpolator.hh"
38 
39 // Constructor
40 
42 { }
43 
44 // Destructor
45 
47 { }
48 
49 
51 { return new G4LinInterpolator; }
52 
54  const G4DataVector& points,
55  const G4DataVector& data) const
56 {
57  G4int nBins = data.size() - 1;
58  G4double value = 0.;
59  if (x < points[0])
60  {
61  value = 0.;
62  }
63  else if (bin < nBins)
64  {
65  G4double e1 = points[bin];
66  G4double e2 = points[bin+1];
67  G4double d1 = data[bin];
68  G4double d2 = data[bin+1];
69  value = d1 + (d2 - d1)*(x - e1)/(e2 - e1);
70  }
71  else
72  {
73  value = data[nBins];
74  }
75  return value;
76 }