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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Sample/Aggregate/Interference2DParacrystal.h
//! @brief Defines class Interference2DParacrystal.
//!
//! @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_INTERFERENCE2DPARACRYSTAL_H
#define BORNAGAIN_SAMPLE_AGGREGATE_INTERFERENCE2DPARACRYSTAL_H
#include "Sample/Aggregate/IInterference.h"
#include "Sample/Correlation/Profiles2D.h"
#include "Sample/Lattice/Lattice2D.h"
#include <array>
#include <heinz/Complex.h>
#include <memory>
class IProfile2D;
//! Interference function of a 2D paracrystal.
class Interference2DParacrystal : public IInterference {
public:
Interference2DParacrystal(const Lattice2D& lattice, double damping_length, double domain_size_1,
double domain_size_2);
~Interference2DParacrystal() override;
#ifndef SWIG
Interference2DParacrystal* clone() const override;
std::vector<const INode*> nodeChildren() const override;
#endif // SWIG
std::string className() const final { return "Interference2DParacrystal"; }
std::vector<ParaMeta> parDefs() const final
{
return {{"DampingLength", "nm"}, {"DomainSize 1", "nm"}, {"DomainSize 2", "nm"}};
}
void setDomainSizes(double size_1, double size_2);
void setProbabilityDistributions(const IProfile2D& pdf_1, const IProfile2D& pdf_2);
void setDampingLength(double damping_length);
std::vector<double> domainSizes() const;
void setIntegrationOverXi(bool integrate_xi);
bool integrationOverXi() const { return m_integrate_xi; }
double dampingLength() const { return m_damping_length; }
const Lattice2D& lattice() const;
double particleDensity() const override;
const IProfile2D* pdf1() const { return m_pdf1.get(); }
const IProfile2D* pdf2() const { return m_pdf2.get(); }
std::string validate() const override;
private:
double iff_without_dw(const R3& q) const override;
double interferenceForXi(double xi, double qx, double qy) const;
double interference1D(double qx, double qy, double xi, size_t index) const;
complex_t FTPDF(double qx, double qy, double xi, size_t index) const;
void transformToPrincipalAxes(double qx, double qy, double gamma, double delta, double& q_pa_1,
double& q_pa_2) const;
bool m_integrate_xi; //!< Integrate over the orientation xi
std::unique_ptr<IProfile2D> m_pdf1, m_pdf2;
std::unique_ptr<Lattice2D> m_lattice; // TODO ASAP name as in other i-fcts
double m_damping_length; //!< Damping length for removing delta function singularity at q=0.
std::array<double, 2> m_domain_sizes; //!< Coherence domain sizes
};
#endif // BORNAGAIN_SAMPLE_AGGREGATE_INTERFERENCE2DPARACRYSTAL_H
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