Cone.h

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      Sample/HardParticle/Cone.h
//! @brief     Defines class Cone
//!
//! @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_HARDPARTICLE_CONE_H
#define BORNAGAIN_SAMPLE_HARDPARTICLE_CONE_H
 
#include "Sample/Particle/IFormFactor.h"
 
//! A conical frustum (cone truncated parallel to the base) with circular base.
//! @ingroup hardParticle
 
class Cone : public IFormFactor {
public:
    Cone(double radius, double height, double alpha);
#ifndef USER_API
    Cone(std::vector<double> P);
 
    Cone* clone() const override { return new Cone(m_radius, m_height, m_alpha); }
    std::string className() const final { return "Cone"; }
    // const auto tooltip = "frustum with circular base";
    std::vector<ParaMeta> parDefs() const final
    {
        return {{"Radius", "nm", "radius of base", 0, +INF, 0},
                {"Height", "nm", "height", 0, +INF, 0},
                {"Alpha", "rad", "angle between base and side", 0., M_PI_2, 0}};
    }
 
    double height() const { return m_height; }
    double alpha() const { return m_alpha; }
    double radius() const { return m_radius; }
 
    double radialExtension() const override { return m_radius; }
 
    complex_t formfactor_at_bottom(C3 q) const override;
#endif // USER_API
 
private:
    const double& m_radius;
    const double& m_height;
    const double& m_alpha;
    double m_cot_alpha;
};
 
#endif // BORNAGAIN_SAMPLE_HARDPARTICLE_CONE_H