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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Sim/Residual/IChiSquaredModule.h
//! @brief Defines interface IChiSquaredModule.
//!
//! @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)
//
// ************************************************************************************************
#ifndef BORNAGAIN_SIM_RESIDUAL_ICHISQUAREDMODULE_H
#define BORNAGAIN_SIM_RESIDUAL_ICHISQUAREDMODULE_H
#include "Base/Type/ICloneable.h"
#include <memory>
class IIntensityFunction;
class IVarianceFunction;
//! Interface residual calculations.
class IChiSquaredModule : public ICloneable {
public:
IChiSquaredModule();
~IChiSquaredModule() override;
#ifndef SWIG
//! clone method
IChiSquaredModule* clone() const override = 0;
#endif // SWIG
//! Returns squared function
const IVarianceFunction* varianceFunction() const;
//! Sets squared function
void setVarianceFunction(const IVarianceFunction& variance_function);
//! Returns data rescaler.
virtual const IIntensityFunction* getIntensityFunction() const;
//! Sets data rescaler.
virtual void setIntensityFunction(const IIntensityFunction& intensity_function);
virtual double residual(double a, double b) = 0;
protected:
IChiSquaredModule(const IChiSquaredModule& other);
std::unique_ptr<IVarianceFunction> m_variance_function;
std::unique_ptr<IIntensityFunction> m_intensity_function;
};
#endif // BORNAGAIN_SIM_RESIDUAL_ICHISQUAREDMODULE_H
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