Geant4 Cross Reference

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Geant4/examples/advanced/composite_calorimeter/include/CCalDataSet.hh

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  1 //
  2 // ********************************************************************
  3 // * License and Disclaimer                                           *
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  6 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
  7 // * conditions of the Geant4 Software License,  included in the file *
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 25 //
 26 #ifndef CCalDataSet_h
 27 #define CCalDataSet_h
 28 
 29 #include "G4ParticleHPInterpolator.hh"
 30 #include <vector>
 31 
 32 // by JPW, working, but to be cleaned up. @@@@
 33 
 34 class CCalDataSet 
 35 {
 36 public:
 37 
 38   void insert(G4double anEnergy, G4double aXsection)
 39   {
 40     pair<G4double, G4double> aPoint(anEnergy, aXsection);
 41     theData.push_back(aPoint);
 42   }
 43   
 44   double getCrossSection(G4double anEnergy)
 45   {
 46     G4double result;
 47     if(anEnergy < theData[0].first)
 48     {
 49       result = 0;
 50     }
 51     else
 52     {
 53       G4double x1,x2;
 54       G4double y1,y2;
 55       if(anEnergy > theData[theData.size()-1].second)
 56       {
 57         // extrapolation
 58         G4int n=theData.size();
 59         x1 = theData[n-1].first;
 60         y1 = theData[n-1].second;
 61         x2 = theData[n-2].first;
 62         y2 = theData[n-2].second;
 63       }
 64       else
 65       {
 66         // linear search and interpolation
 67         unsigned int i;
 68         for(i=0; i<theData.size(); ++i)
 69         {
 70           if(theData[i].first>anEnergy) break;
 71         }
 72         x1 = theData[i-1].first;
 73         y1 = theData[i-1].second;
 74         x2 = theData[i].first;
 75         y2 = theData[i].second;
 76       }
 77       // interpolate logarithmic in energy and linear in cross-section
 78       result = theInterpolator.Interpolate(LOGLIN, anEnergy,  x1,x2,y1,y2);
 79     }
 80     return result*barn;
 81   }
 82 
 83 private:
 84 
 85   G4ParticleHPInterpolator theInterpolator;
 86   
 87 private:
 88 
 89   vector<pair<G4double, G4double> > theData;
 90 };
 91 #endif
 92