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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Sim/Residual/VarianceFunctions.cpp
//! @brief Implements class IVarianceFunctiones.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "Sim/Residual/VarianceFunctions.h"
#include <algorithm>
// ************************************************************************************************
// class VarianceConstantFunction
// ************************************************************************************************
VarianceConstantFunction* VarianceConstantFunction::clone() const
{
return new VarianceConstantFunction();
}
double VarianceConstantFunction::variance(double, double) const
{
return 1.0;
}
// ************************************************************************************************
// class VarianceSimFunction
// ************************************************************************************************
VarianceSimFunction::VarianceSimFunction(double epsilon)
: m_epsilon(epsilon)
{
}
VarianceSimFunction* VarianceSimFunction::clone() const
{
return new VarianceSimFunction(m_epsilon);
}
double VarianceSimFunction::variance(double /*exp*/, double sim) const
{
return std::max(sim, m_epsilon);
}
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