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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Sample/Material/MaterialBySLDImpl.h
//! @brief Defines class MaterialBySLDImpl.
//!
//! @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_SAMPLE_MATERIAL_MATERIALBYSLDIMPL_H
#define BORNAGAIN_SAMPLE_MATERIAL_MATERIALBYSLDIMPL_H
#include "Sample/Material/IMaterialImpl.h"
#include "Sample/Material/MaterialFactoryFuncs.h"
//! Material implementation based on wavelength-independent data (valid for a range of wavelengths)
class MaterialBySLDImpl : public IMaterialImpl {
public:
friend Material MaterialBySLD(const std::string& name, double sld_real, double sld_imag,
const R3& magnetization);
~MaterialBySLDImpl() override = default;
#ifndef SWIG
//! Returns pointer to a copy of material
MaterialBySLDImpl* clone() const override;
#endif // SWIG
//! Returns refractive index
complex_t refractiveIndex(double wavelength) const override;
//! Returns squared refractive index
complex_t refractiveIndex2(double wavelength) const override;
//! Returns underlying material SLD in AA^-2
complex_t refractiveIndex_or_SLD() const override;
//! Returns type of material implementation
MATERIAL_TYPES typeID() const override { return MATERIAL_TYPES::MaterialBySLD; }
//! Returns (\f$ \pi/\lambda^2 \f$ - sld), sld (in \f$nm^{-2}\f$) being the scattering length
//! density
complex_t scalarSubtrSLD(double lambda0) const override;
//! Prints object SLD (in \f$ AA^{-2} \f$) and magnetization
std::string print() const override;
private:
//! Constructs a wavelength-independent material with a given complex-valued
//! scattering length density (SLD). SLD units are \f$ nm^{-2} \f$.
MaterialBySLDImpl(const std::string& name, double sld_real, double sld_imag,
const R3& magnetization);
//! Returns the scattering length density in \f$ nm^{-2} \f$
complex_t sld() const;
const double m_sld_real; //!< complex-valued scattering length density
const double m_sld_imag; //!< imaginary part of scattering length density (negative by default)
};
#endif // BORNAGAIN_SAMPLE_MATERIAL_MATERIALBYSLDIMPL_H
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