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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Resample/Interparticle/SSCAStrategy.h
//! @brief Defines class SSCAStrategy.
//!
//! @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)
//
// ************************************************************************************************
#ifdef SWIG
#error no need to expose this header to Swig
#endif // SWIG
#ifndef BORNAGAIN_RESAMPLE_INTERPARTICLE_SSCASTRATEGY_H
#define BORNAGAIN_RESAMPLE_INTERPARTICLE_SSCASTRATEGY_H
#include "Resample/Interparticle/IInterparticleStrategy.h"
class DiffuseElement;
class InterferenceRadialParacrystal;
//! Strategy class to compute the total scattering from a particle layout
//! in the size-spacing correlation approximation.
class SSCAStrategy : public IInterparticleStrategy {
public:
SSCAStrategy(const OwningVector<const CoheringSubparticles>& weighted_formfactors,
const InterferenceRadialParacrystal* iff, SimulationOptions options,
bool polarized, double kappa);
private:
double scalarCalculation(const DiffuseElement& ele) const override;
double polarizedCalculation(const DiffuseElement& ele) const override;
complex_t getCharacteristicSizeCoupling(
double qp, const OwningVector<const CoheringSubparticles>& ff_wrappers) const;
complex_t calculatePositionOffsetPhase(double qp, double radial_extension) const;
const std::unique_ptr<InterferenceRadialParacrystal> m_iff;
const double m_kappa;
const double m_mean_radius;
};
#endif // BORNAGAIN_RESAMPLE_INTERPARTICLE_SSCASTRATEGY_H
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