00001 // 00002 // ******************************************************************** 00003 // * License and Disclaimer * 00004 // * * 00005 // * The Geant4 software is copyright of the Copyright Holders of * 00006 // * the Geant4 Collaboration. It is provided under the terms and * 00007 // * conditions of the Geant4 Software License, included in the file * 00008 // * LICENSE and available at http://cern.ch/geant4/license . These * 00009 // * include a list of copyright holders. * 00010 // * * 00011 // * Neither the authors of this software system, nor their employing * 00012 // * institutes,nor the agencies providing financial support for this * 00013 // * work make any representation or warranty, express or implied, * 00014 // * regarding this software system or assume any liability for its * 00015 // * use. Please see the license in the file LICENSE and URL above * 00016 // * for the full disclaimer and the limitation of liability. * 00017 // * * 00018 // * This code implementation is the result of the scientific and * 00019 // * technical work of the GEANT4 collaboration. * 00020 // * By using, copying, modifying or distributing the software (or * 00021 // * any work based on the software) you agree to acknowledge its * 00022 // * use in resulting scientific publications, and indicate your * 00023 // * acceptance of all terms of the Geant4 Software license. * 00024 // ******************************************************************** 00025 // 00026 // 00027 // $Id$ 00028 // 00029 // Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch) 00030 // 00031 // History: 00032 // ----------- 00033 // 31 Jul 2001 MGP Created 00034 // 31 Jul 2008 MGP Revised and renamed to G4LogLogInterpolator 00035 // 00036 // ------------------------------------------------------------------- 00037 00038 #include "G4LogLogInterpolator.hh" 00039 00040 // Constructor 00041 00042 G4LogLogInterpolator::G4LogLogInterpolator() 00043 { } 00044 00045 // Destructor 00046 00047 G4LogLogInterpolator::~G4LogLogInterpolator() 00048 { } 00049 00050 G4IInterpolator* G4LogLogInterpolator::Clone() const 00051 { return new G4LogLogInterpolator; } 00052 00053 00054 G4double G4LogLogInterpolator::Calculate(G4double x, G4int bin, 00055 const G4DataVector& points, 00056 const G4DataVector& data) const 00057 { 00058 G4int nBins = data.size() - 1; 00059 // ---- MGP ---- To be verified; value = 0. is redundant here 00060 G4double value = 0.; 00061 if (x < points[0] || x == 0.) 00062 { 00063 value = 0; 00064 } 00065 else if (bin < nBins) 00066 { 00067 G4double e1 = points[bin]; 00068 G4double e2 = points[bin+1]; 00069 G4double d1 = data[bin]; 00070 G4double d2 = data[bin+1]; 00071 00072 if (d1 != 0. && d2 != 0.) 00073 { 00074 value = (std::log10(d1)*std::log10(e2/x) + std::log10(d2)*std::log10(x/e1)) / std::log10(e2/e1); 00075 value = std::pow(10.,value); 00076 } 00077 else 00078 { 00079 value = 0.; 00080 } 00081 } 00082 else 00083 { 00084 value = data[nBins]; 00085 } 00086 00087 return value; 00088 }