#include <G4SemiLogInterpolation.hh>

Inheritance diagram for G4SemiLogInterpolation:

Public Member Functions
G4double	Calculate (G4double point, G4int bin, const G4DataVector &energies, const G4DataVector &data) const override

G4double	Calculate (G4double point, G4int bin, const G4DataVector &energies, const G4DataVector &data, const G4DataVector &log_energies, const G4DataVector &log_data) const override

G4VDataSetAlgorithm *	Clone () const override

	G4SemiLogInterpolation ()

	~G4SemiLogInterpolation ()

Detailed Description

Definition at line 51 of file G4SemiLogInterpolation.hh.

Constructor & Destructor Documentation

◆ G4SemiLogInterpolation()

G4SemiLogInterpolation::G4SemiLogInterpolation ( )

explicit

Definition at line 40 of file G4SemiLogInterpolation.cc.

41{ }

Referenced by Clone().

◆ ~G4SemiLogInterpolation()

G4SemiLogInterpolation::~G4SemiLogInterpolation ( )

Definition at line 46 of file G4SemiLogInterpolation.cc.

47{ }

Member Function Documentation

◆ Calculate() [1/2]

G4double G4SemiLogInterpolation::Calculate	(	G4double	point,
		G4int	bin,
		const G4DataVector &	energies,
		const G4DataVector &	data
	)		const

overridevirtual

Implements G4VDataSetAlgorithm.

Definition at line 54 of file G4SemiLogInterpolation.cc.

{
  G4int nBins = 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*std::log10(e2/x) + d2*std::log10(x/e1)) / std::log10(e2/e1);
    }
  else
    {
      value = data[nBins];
    }
  return value;
}

References d1, d2, e1, and e2.

◆ Calculate() [2/2]

G4double G4SemiLogInterpolation::Calculate	(	G4double	point,
		G4int	bin,
		const G4DataVector &	energies,
		const G4DataVector &	data,
		const G4DataVector &	log_energies,
		const G4DataVector &	log_data
	)		const

overridevirtual

Implements G4VDataSetAlgorithm.

Definition at line 80 of file G4SemiLogInterpolation.cc.

{
  //A combination of logarithmic interpolation on energy set and 
  //linear Interpolation on data set
  //G4cout << "G4SemiLogInterpolation is performed (4 arguments)" << G4endl;
  G4int nBins = data.size() - 1;
  G4double value = 0.;
  G4double log_x = std::log10(x);
  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];      
      G4double log_e1 = log_points[bin];
      G4double log_e2 = log_points[bin+1];
     
      // Values log_e1 and log_e2 are the log values of the corresponding
      // original energy actual values. Original d1 and d2 values are used.
      // Simple linear interpolation performed on loagarithmic data 
      // should be equivalent to semi log-log interpolation
      if (e1 == 0.0) log_e1 = -300;
      if (e2 == 0.0) log_e2 = -300;
      value = d1 + (d2 - d1)*(log_x - log_e1)/(log_e2 - log_e1);
   }
 else
   {
     value = data[nBins];
   }
  return value;
}