#include <G4LinInterpolation.hh>

Inheritance diagram for G4LinInterpolation:

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

	G4LinInterpolation ()

	~G4LinInterpolation ()

Detailed Description

Definition at line 51 of file G4LinInterpolation.hh.

Constructor & Destructor Documentation

◆ G4LinInterpolation()

G4LinInterpolation::G4LinInterpolation ( )

explicit

Definition at line 42 of file G4LinInterpolation.cc.

43{ }

Referenced by Clone().

◆ ~G4LinInterpolation()

G4LinInterpolation::~G4LinInterpolation ( )

Definition at line 47 of file G4LinInterpolation.cc.

48{ }

Member Function Documentation

◆ Calculate() [1/2]

G4double G4LinInterpolation::Calculate	(	G4double	point,
		G4int	bin,
		const G4DataVector &	energies,
		const G4DataVector &	data
	)		const

overridevirtual

Implements G4VDataSetAlgorithm.

Definition at line 55 of file G4LinInterpolation.cc.

{
  //G4cout << "G4LinInterpolation is performed (2 arguments)" << G4endl;
  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 + (d2 - d1)*(x - e1)/(e2 - e1);
    }
  else
    {
      value = data[nBins];
    }
  return value;
}

References d1, d2, e1, and e2.

Referenced by G4EMDataSet::IntegrationFunction(), G4DataSet::IntegrationFunction(), G4EMDataSet::RandomSelect(), and G4DataSet::RandomSelect().

◆ Calculate() [2/2]

G4double G4LinInterpolation::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 85 of file G4LinInterpolation.cc.

{
//Linear Interpolation is performed on loagarithmic data set
//Equivalent to log-log interpolation on non-loagarithmic data set
  //G4cout << "G4LinInterpolation 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 log_e1 = log_points[bin];
      G4double log_e2 = log_points[bin+1];
      G4double log_d1 = log_data[bin];
      G4double log_d2 = log_data[bin+1];
 
// Values e1, e2, d1 and d2 are the log values of the corresponding
// original energy and data values. Simple linear interpolation performed
// on loagarithmic data should be equivalent to log-log interpolation
      value = log_d1 + (log_d2 - log_d1)*(log_x - log_e1)/(log_e2 - log_e1);
 
// Delogarithmize to obtain interpolated value
      value = std::pow(10.,value);
   }
 else
   {
     value = data[nBins];
   }
  return value;
}