Gabriele Cosmo
92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
//
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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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#ifndef CCalDataSet_h
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#define CCalDataSet_h
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#include "G4ParticleHPInterpolator.hh"
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#include <vector>
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// by JPW, working, but to be cleaned up. @@@@
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class CCalDataSet
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{
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public:
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void insert(double anEnergy, double aXsection)
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{
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pair<double, double> aPoint(anEnergy, aXsection);
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theData.push_back(aPoint);
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}
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double getCrossSection(double anEnergy)
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{
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double result;
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if(anEnergy < theData[0].first)
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{
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result = 0;
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}
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else
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{
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double x1,x2;
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double y1,y2;
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if(anEnergy > theData[theData.size()-1].second)
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{
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// extrapolation
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int n=theData.size();
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x1 = theData[n-1].first;
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y1 = theData[n-1].second;
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x2 = theData[n-2].first;
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y2 = theData[n-2].second;
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}
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else
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{
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// linear search and interpolation
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unsigned int i;
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for(i=0; i<theData.size(); i++)
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{
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if(theData[i].first>anEnergy) break;
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}
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x1 = theData[i-1].first;
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y1 = theData[i-1].second;
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x2 = theData[i].first;
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y2 = theData[i].second;
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}
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// interpolate logarithmic in energy and linear in cross-section
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result = theInterpolator.Interpolate(LOGLIN, anEnergy, x1,x2,y1,y2);
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}
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return result*barn;
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}
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private:
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G4ParticleHPInterpolator theInterpolator;
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private:
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vector<pair<double, double> > theData;
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};
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#endif
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