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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Sample/Aggregate/InterferenceFinite2DLattice.h
//! @brief Defines class InterferenceFinite2DLattice.
//!
//! @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_AGGREGATE_INTERFERENCEFINITE2DLATTICE_H
#define BORNAGAIN_SAMPLE_AGGREGATE_INTERFERENCEFINITE2DLATTICE_H
#include "Sample/Aggregate/IInterference.h"
#include "Sample/Lattice/Lattice2D.h"
//! Interference function of a finite 2D lattice.
class InterferenceFinite2DLattice : public IInterference {
public:
InterferenceFinite2DLattice(const Lattice2D& lattice, unsigned N_1, unsigned N_2);
~InterferenceFinite2DLattice() override;
#ifndef SWIG
InterferenceFinite2DLattice* clone() const override;
std::vector<const INode*> nodeChildren() const override;
#endif // SWIG
std::string className() const final { return "InterferenceFinite2DLattice"; }
unsigned numberUnitCells1() const { return m_N_1; }
unsigned numberUnitCells2() const { return m_N_2; }
void setIntegrationOverXi(bool integrate_xi);
bool integrationOverXi() const { return m_integrate_xi; }
const Lattice2D& lattice() const;
//! Returns the particle density associated with this 2d lattice
double particleDensity() const override;
private:
double iff_without_dw(const R3& q) const override;
double interferenceForXi(double xi, double qx, double qy) const;
bool m_integrate_xi; //!< Integrate over the orientation xi
std::unique_ptr<Lattice2D> m_lattice;
unsigned m_N_1, m_N_2; //!< Size of the finite lattice in lattice units
};
#endif // BORNAGAIN_SAMPLE_AGGREGATE_INTERFERENCEFINITE2DLATTICE_H
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