FormFactorDot.h

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// ************************************************************************** //
//
//  BornAgain: simulate and fit scattering at grazing incidence
//
//! @file      Sample/HardParticle/FormFactorDot.h
//! @brief     Defines class FormFactorDot.
//!
//! @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_CORE_HARDPARTICLE_FORMFACTORDOT_H
#define BORNAGAIN_CORE_HARDPARTICLE_FORMFACTORDOT_H
 
#include "Sample/Scattering/IFormFactorBorn.h"
 
//! A dot, with scattering power as a sphere of radius rscat, but with F(q)=const.
//! @ingroup hardParticle
 
class FormFactorDot : public IFormFactorBorn
{
public:
    FormFactorDot(const std::vector<double> P);
    FormFactorDot(double radius);
 
    FormFactorDot* clone() const override final { return new FormFactorDot(m_radius); }
    void accept(INodeVisitor* visitor) const override final { visitor->visit(this); }
 
    double getRadius() const { return m_radius; }
 
    double radialExtension() const override final { return 0; }
 
    double bottomZ(const IRotation&) const override final { return 0; }
    double topZ(const IRotation&) const override final { return 0; }
 
    complex_t evaluate_for_q(cvector_t q) const override final;
 
protected:
    bool canSliceAnalytically(const IRotation&) const override final { return false; }
 
private:
    const double& m_radius;
};
 
#endif // BORNAGAIN_CORE_HARDPARTICLE_FORMFACTORDOT_H