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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Sim/Residual/IIntensityFunction.cpp
//! @brief Implements class thees IntensityFunctionLog, IntensityFunctionSqrt.
//!
//! @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/IIntensityFunction.h"
#include <cmath>
#include <limits>
IIntensityFunction::~IIntensityFunction() = default;
IntensityFunctionLog* IntensityFunctionLog::clone() const
{
return new IntensityFunctionLog;
}
double IntensityFunctionLog::evaluate(double value) const
{
return value > 0 ? std::log(value) : std::numeric_limits<double>::lowest();
}
IntensityFunctionSqrt* IntensityFunctionSqrt::clone() const
{
return new IntensityFunctionSqrt;
}
double IntensityFunctionSqrt::evaluate(double value) const
{
return value > 0 ? std::sqrt(value) : std::numeric_limits<double>::lowest();
}
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