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geant4/source/processes/electromagnetic/pii/src/G4LinInterpolator.cc
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2022-12-09 14:43:28 +01:00

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//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
// * the Geant4 Collaboration. It is provided under the terms and *
// * conditions of the Geant4 Software License, included in the file *
// * LICENSE and available at http://cern.ch/geant4/license . These *
// * include a list of copyright holders. *
// * *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work make any representation or warranty, express or implied, *
// * regarding this software system or assume any liability for its *
// * use. Please see the license in the file LICENSE and URL above *
// * for the full disclaimer and the limitation of liability. *
// * *
// * This code implementation is the result of the scientific and *
// * technical work of the GEANT4 collaboration. *
// * By using, copying, modifying or distributing the software (or *
// * any work based on the software) you agree to acknowledge its *
// * use in resulting scientific publications, and indicate your *
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
//
//
// Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
//
// History:
// -----------
// 31 Jul 2001 MGP Created
// 31 Jul 2008 MGP Revised and renamed to G4LinInterpolator
//
// -------------------------------------------------------------------
#include "G4LinInterpolator.hh"
// Constructor
G4LinInterpolator::G4LinInterpolator()
{ }
// Destructor
G4LinInterpolator::~G4LinInterpolator()
{ }
G4IInterpolator* G4LinInterpolator::Clone() const
{ return new G4LinInterpolator; }
G4double G4LinInterpolator::Calculate(G4double x, G4int bin,
const G4DataVector& points,
const G4DataVector& data) const
{
G4int nBins = G4int(data.size() - 1);
G4double value = 0.;
if (x < points[0])
{
value = 0.;
}
else if (bin < nBins)
{
G4double e1 = points[bin];
G4double e2 = points[bin+1];
G4double d1 = data[bin];
G4double d2 = data[bin+1];
value = d1 + (d2 - d1)*(x - e1)/(e2 - e1);
}
else
{
value = data[nBins];
}
return value;
}