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// Copyright (c) 2024-2024, Oslandia. // Copyright (c) 2024-2025, SFCGAL team. // SPDX-License-Identifier: LGPL-2.0-or-later #ifndef SFCGAL_CYLINDER_H_ #define SFCGAL_CYLINDER_H_ #include "SFCGAL/Kernel.h" #include "SFCGAL/export.h" #include #include #include #include namespace SFCGAL { /** * @class Cylinder * @brief Represents a cylinder in 3D space * * This class provides methods to generate a polyhedron and a surface mesh * representation of a cylinder. It uses SFCGAL's Kernel for exact computations. */ class SFCGAL_API Cylinder { public: /** * @brief Constructs a Cylinder object * @param base_center The center point of the base of the cylinder * @param axis The axis of the cylinder * @param radius The radius of the cylinder * @param height The height of the cylinder * @param num_radial The number of radial divisions */ Cylinder(const Point_3 &base_center = Point_3(0, 0, 0), const Vector_3 &axis = Vector_3(0, 0, 1), const Kernel::FT &radius = 1.0, const Kernel::FT &height = 1.0, int num_radial = 32); /** * @brief Copy constructor */ Cylinder(const Cylinder &other) = default; /** * @brief Assignment operator */ Cylinder & operator=(Cylinder other); /** * @brief Destructor */ ~Cylinder() = default; /** * @brief Sets the base center of the cylinder * @param base_center The new base center point */ void setBaseCenter(const Point_3 &base_center); /** * @brief Sets the axis of the cylinder * @param axis The new axis vector */ void setAxis(const Vector_3 &axis); /** * @brief Sets the radius of the cylinder * @param radius The new radius */ void setRadius(const Kernel::FT &radius); /** * @brief Sets the height of the cylinder * @param height The new height */ void setHeight(const Kernel::FT &height); /** * @brief Sets the number of radial divisions * @param num The new number of radial divisions */ void setNumRadial(int num); /** * @brief Gets the base center of the cylinder * @return The base center point */ const Point_3 & baseCenter() const { return m_base_center; } /** * @brief Gets the axis of the cylinder * @return The axis vector */ const Vector_3 & axis() const { return m_axis; } /** * @brief Gets the radius of the cylinder * @return The radius */ const Kernel::FT & radius() const { return m_radius; } /** * @brief Gets the height of the cylinder * @return The height */ const Kernel::FT & height() const { return m_height; } /** * @brief Gets the number of radial divisions * @return The number of radial divisions */ int numRadial() const { return m_num_radial; } /** * @brief Generates a polyhedron representation of the cylinder * @return A CGAL::Polyhedron_3 object representing the cylinder */ Polyhedron_3 generatePolyhedron(); /** * @brief Generates a surface mesh representation of the cylinder * @return A CGAL::Surface_mesh object representing the cylinder */ Surface_mesh_3 generateSurfaceMesh(); double volume() const { return CGAL::to_double(m_radius * m_radius * m_height * CGAL_PI); } double area() const { return CGAL::to_double(2 * m_radius * m_radius * CGAL_PI + 2 * m_radius * m_height * CGAL_PI); } private: Point_3 m_base_center; Vector_3 m_axis; Kernel::FT m_radius; Kernel::FT m_height; int m_num_radial; std::optional m_polyhedron; std::optional m_surface_mesh; /** * @brief Invalidates the cached polyhedron and surface mesh */ void invalidateCache(); /** * @brief Normalizes a vector * @param v The vector to normalize * @return The normalized vector */ Vector_3 normalize(const Vector_3 &v); }; } // namespace SFCGAL #endif // SFCGAL_CYLINDER_H_