Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/examples/advanced/eRosita/physics/src/G4RDLinLogInterpolation.cc

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  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 //
 28 // Author:  Vladimir Ivanchenko (Vladimir.Ivantchenko@cern.ch)
 29 //
 30 // History:
 31 // -----------
 32 // 27 May 2002   VI        Created
 33 //
 34 // -------------------------------------------------------------------
 35 
 36 #include "G4RDLinLogInterpolation.hh"
 37 
 38 // Constructor
 39 
 40 G4RDLinLogInterpolation::G4RDLinLogInterpolation()
 41 { }
 42 
 43 
 44 // Destructor
 45 
 46 G4RDLinLogInterpolation::~G4RDLinLogInterpolation()
 47 { }
 48 
 49 
 50 G4double G4RDLinLogInterpolation::Calculate(G4double x, G4int bin, 
 51             const G4DataVector& points, 
 52             const G4DataVector& data) const
 53 {
 54   G4int nBins = data.size() - 1;
 55   G4double value = 0.;
 56   if (x < points[0])
 57     {
 58       value = 0.;
 59     }
 60   else if (bin < nBins)
 61     {
 62       G4double e1 = points[bin];
 63       G4double e2 = points[bin+1];
 64       G4double d1 = std::log(data[bin]);
 65       G4double d2 = std::log(data[bin+1]);
 66       value = std::exp(d1 + (d2 - d1)*(x - e1)/ (e2 - e1));
 67     }
 68   else
 69     {
 70       value = data[nBins];
 71     }
 72   return value;
 73 }
 74