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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Resample/Interparticle/DecouplingApproximationStrategy.h
//! @brief Defines class DecouplingApproximationStrategy.
//!
//! @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_DECOUPLINGAPPROXIMATIONSTRATEGY_H
#define BORNAGAIN_RESAMPLE_INTERPARTICLE_DECOUPLINGAPPROXIMATIONSTRATEGY_H
#include "Resample/Interparticle/IInterparticleStrategy.h"
class DiffuseElement;
//! Strategy class to compute the total scattering from a particle layout
//! in the decoupling approximation.
class DecouplingApproximationStrategy : public IInterparticleStrategy {
public:
DecouplingApproximationStrategy(
const OwningVector<const CoheringSubparticles>& weighted_formfactors,
const IInterference* iff, SimulationOptions options, bool polarized);
private:
//! Returns the total scalar incoherent and coherent scattering intensity
//! for given kf and for one particle layout (implied by the given particle form factors).
double scalarCalculation(const DiffuseElement& ele) const override;
//! Returns the total polarized incoherent and coherent scattering intensity
//! for given kf and for one particle layout (implied by the given particle form factors).
double polarizedCalculation(const DiffuseElement& ele) const override;
const std::unique_ptr<IInterference> m_iff;
};
#endif // BORNAGAIN_RESAMPLE_INTERPARTICLE_DECOUPLINGAPPROXIMATIONSTRATEGY_H
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