Geant4  9.6.p02
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
G4RDLogLogInterpolation.cc
Go to the documentation of this file.
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
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 *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 //
27 // $Id$
28 // GEANT4 tag $Name: geant4-09-01-ref-00 $
29 //
30 // Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
31 //
32 // History:
33 // -----------
34 // 31 Jul 2001 MGP Created
35 //
36 // -------------------------------------------------------------------
37 
39 
40 // Constructor
41 
43 { }
44 
45 // Destructor
46 
48 { }
49 
51 { return new G4RDLogLogInterpolation; }
52 
53 
55  const G4DataVector& points,
56  const G4DataVector& data) const
57 {
58  G4int nBins = data.size() - 1;
59  G4double value = 0.;
60  if (x < points[0])
61  {
62  value = 0.;
63  }
64  else if (bin < nBins)
65  {
66  G4double e1 = points[bin];
67  G4double e2 = points[bin+1];
68  G4double d1 = data[bin];
69  G4double d2 = data[bin+1];
70  value = (std::log10(d1)*std::log10(e2/x) + std::log10(d2)*std::log10(x/e1)) / std::log10(e2/e1);
71  value = std::pow(10.,value);
72  }
73  else
74  {
75  value = data[nBins];
76  }
77 
78  return value;
79 }