teapot_mesh.hpp

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#ifndef GENERATOR_TEAPOTMESH_HPP
#define GENERATOR_TEAPOTMESH_HPP
 
#include <array>
#include <memory>
 
#include "bezier_mesh.hpp"
#include "mesh_vertex.hpp"
#include "triangle.hpp"
#include "utils.hpp"
 
namespace generator
{
 
class teapot_mesh_t
{
public:
    class triangles_t
    {
    public:
        bool done() const noexcept;
        triangle_t generate() const;
        void next();
 
    private:
        const teapot_mesh_t* mesh_t;
 
        int index_;
 
        std::shared_ptr<const bezier_mesh_t<4, 4>> patch_mesh_;
 
        typename triangle_generator_type<bezier_mesh_t<4, 4>>::type triangles_;
 
        explicit triangles_t(const teapot_mesh_t& mesh) noexcept;
 
        friend class teapot_mesh_t;
    };
 
    class vertices_t
    {
    public:
        bool done() const noexcept;
        mesh_vertex_t generate() const;
        void next();
 
    private:
        const teapot_mesh_t* mesh_;
 
        int index_;
 
        // Needs be a shared_ptr in order to make copy/move not to mess up the
        // internal pointer in triangles_.
        std::shared_ptr<const bezier_mesh_t<4, 4>> patch_mesh_;
 
        typename vertex_generator_type<bezier_mesh_t<4, 4>>::type vertices_;
 
        explicit vertices_t(const teapot_mesh_t& mesh) noexcept;
 
        friend class teapot_mesh_t;
    };
 
    explicit teapot_mesh_t(int segments = 8) noexcept;
 
    triangles_t triangles() const noexcept;
 
    vertices_t vertices() const noexcept;
 
private:
    int segments_;
 
    int patch_vertex_count_;
};
} // namespace generator
 
#endif