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G4RDLinInterpolation.cc
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1 //
2 // ********************************************************************
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5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
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15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
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 //
34 // -------------------------------------------------------------------
35 
36 #include "G4RDLinInterpolation.hh"
37 
38 // Constructor
39 
41 { }
42 
43 // Destructor
44 
46 { }
47 
48 
50 { return new G4RDLinInterpolation; }
51 
53  const G4DataVector& points,
54  const G4DataVector& data) const
55 {
56  G4int nBins = data.size() - 1;
57  G4double value = 0.;
58  if (x < points[0])
59  {
60  value = 0.;
61  }
62  else if (bin < nBins)
63  {
64  G4double e1 = points[bin];
65  G4double e2 = points[bin+1];
66  G4double d1 = data[bin];
67  G4double d2 = data[bin+1];
68  value = d1 + (d2 - d1)*(x - e1)/(e2 - e1);
69  }
70  else
71  {
72  value = data[nBins];
73  }
74  return value;
75 }