FormFactorSphereGaussianRadius.h

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      Sample/SoftParticle/FormFactorSphereGaussianRadius.h
//! @brief     Defines and implements class FormFactorSphereGaussianRadius.
//!
//! @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_SOFTPARTICLE_FORMFACTORSPHEREGAUSSIANRADIUS_H
#define BORNAGAIN_SAMPLE_SOFTPARTICLE_FORMFACTORSPHEREGAUSSIANRADIUS_H
 
#include "Sample/Scattering/IBornFF.h"
#include <memory>
 
//! A sphere with gaussian radius distribution.
//! @ingroup softParticle
 
class FormFactorSphereGaussianRadius : public IBornFF {
public:
    FormFactorSphereGaussianRadius(const std::vector<double> P);
    FormFactorSphereGaussianRadius(double mean, double sigma);
 
    FormFactorSphereGaussianRadius* clone() const final
    {
        return new FormFactorSphereGaussianRadius(m_mean, m_sigma);
    }
 
    void accept(INodeVisitor* visitor) const final { visitor->visit(this); }
 
    double radialExtension() const final { return m_mean; }
 
    complex_t evaluate_for_q(cvector_t q) const final;
 
protected:
    void onChange() final;
 
private:
    double calculateMeanR3() const;
 
    const double& m_mean; //!< This is the mean radius
    const double& m_sigma;
    double m_mean_r3; //!< This is the radius that gives the mean volume
};
 
#endif // BORNAGAIN_SAMPLE_SOFTPARTICLE_FORMFACTORSPHEREGAUSSIANRADIUS_H