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// ************************************************************************************************
//
// libformfactor: efficient and accurate computation of scattering form factors
//
//! @file ff/Prism.h
//! @brief Defines class Prism.
//!
//! @homepage https://jugit.fz-juelich.de/mlz/libformfactor
//! @license GNU General Public License v3 or higher (see LICENSE)
//! @copyright Forschungszentrum Jülich GmbH 2022
//! @author Joachim Wuttke, Scientific Computing Group at MLZ (see CITATION)
//
// ************************************************************************************************
#ifndef FF_PRISM_H
#define FF_PRISM_H
#include "ff/IBody.h"
#include <memory>
namespace ff {
class Face;
class Polyhedron;
class Prism : public IBody {
public:
Prism(bool symmetry_Ci, double height, const std::vector<R3>& base_vertices,
const R3& location = {});
~Prism() override;
double radius() const override { return m_radius; }
double volume() const override { return m_volume; }
const std::vector<R3>& vertices() const override;
const Topology& topology() const;
double z_bottom() const override;
R3 center_of_mass() const override { return location(); }
complex_t formfactor_at_center(const C3& q) const override;
Polyhedron* asPolyhedron() const;
protected:
// given geometry:
const double m_height;
const std::vector<R3> m_base_vertices;
// precomputed cache:
const std::unique_ptr<const Face> m_base;
const double m_radius;
const double m_volume;
// on-demand computed once:
mutable std::vector<R3> my_vertices;
mutable std::unique_ptr<Topology> my_topology;
};
} // namespace ff
#endif // FF_PRISM_H
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