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G4SemiLogInterpolation.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file G4SemiLogInterpolation.cc
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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//
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// Author: Maria Grazia Pia (Maria.Grazia.Pia@cern.ch)
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//
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// History:
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// -----------
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// 31 Jul 2001 MGP Created
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//
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// -------------------------------------------------------------------
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#include "
G4SemiLogInterpolation.hh
"
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// Constructor
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G4SemiLogInterpolation::G4SemiLogInterpolation
()
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{ }
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// Destructor
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G4SemiLogInterpolation::~G4SemiLogInterpolation
()
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{ }
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G4VDataSetAlgorithm
*
G4SemiLogInterpolation::Clone
()
const
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{
return
new
G4SemiLogInterpolation
; }
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G4double
G4SemiLogInterpolation::Calculate
(
G4double
x
,
G4int
bin
,
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const
G4DataVector
& points,
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const
G4DataVector
&
data
)
const
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{
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//G4cout << "G4SemiLogInterpolation is performed(2 arguments) " << G4endl;
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G4int
nBins = data.size() - 1;
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G4double
value
= 0.;
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if
(x < points[0])
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{
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value = 0.;
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}
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else
if
(bin < nBins)
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{
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G4double
e1
= points[
bin
];
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G4double
e2
= points[bin+1];
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G4double
d1
= data[
bin
];
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G4double
d2
= data[bin+1];
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value = (d1*std::log10(e2/x) + d2*std::log10(x/e1)) / std::log10(e2/e1);
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}
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else
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{
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value = data[nBins];
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}
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return
value
;
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}
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G4double
G4SemiLogInterpolation::Calculate
(
G4double
x
,
G4int
bin
,
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const
G4DataVector
& points,
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const
G4DataVector
&
data
,
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const
G4DataVector
& log_points,
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const
G4DataVector
&
/*log_data*/
)
const
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{
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//A combination of logarithmic interpolation on energy set and
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//linear Interpolation on data set
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//G4cout << "G4SemiLogInterpolation is performed (4 arguments)" << G4endl;
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G4int
nBins = data.size() - 1;
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G4double
value
= 0.;
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G4double
log_x = std::log10(x);
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if
(x < points[0])
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{
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value = 0.;
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}
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else
if
(bin < nBins)
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{
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G4double
e1
= points[
bin
];
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G4double
e2
= points[bin+1];
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G4double
d1
= data[
bin
];
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G4double
d2
= data[bin+1];
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G4double
log_e1 = log_points[
bin
];
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G4double
log_e2 = log_points[bin+1];
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//G4double log_d1 = log_data[bin];
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//G4double log_d2 = log_data[bin+1];
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//G4cout << "x = " << x << " , log_x = " << log_x << " , bin = " << bin << G4endl;
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//G4cout << "e1 = " << e1 << " , d1 = " << d1 << G4endl;
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//G4cout << "e2 = " << e2 << " , d2 = " << d2 << G4endl;
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// Values log_e1 and log_e2 are the log values of the corresponding
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// original energy actual values. Original d1 and d2 values are used.
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// Simple linear interpolation performed on loagarithmic data
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// should be equivalent to semi log-log interpolation
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if
(e1 == 0.0) log_e1 = -300;
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if
(e2 == 0.0) log_e2 = -300;
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value = d1 + (d2 -
d1
)*(log_x - log_e1)/(log_e2 - log_e1);
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//G4cout << "G4SemiLogInterpolation - Final Interpolated Value: " << value << G4endl << G4endl;
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}
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else
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{
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value = data[nBins];
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}
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return
value
;
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}
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geant4
tree
geant4-10.6-release
source
processes
electromagnetic
lowenergy
src
G4SemiLogInterpolation.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:33
using
1.8.2 with
ECCE GitHub integration