parametric_shape.hpp

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#ifndef GENERATOR_PARAMETRICSHAPE_HPP
#define GENERATOR_PARAMETRICSHAPE_HPP
 
#include <functional>
 
#include "edge.hpp"
#include "shape_vertex.hpp"
 
namespace generator
{
 
class parametric_shape_t
{
public:
    class edges_t
    {
    public:
        edge_t generate() const;
        bool done() const noexcept;
        void next();
 
    private:
        explicit edges_t(const parametric_shape_t& shape);
 
        const parametric_shape_t* shape_;
 
        int i_;
 
        friend class parametric_shape_t;
    };
 
    class vertices_t
    {
    public:
        shape_vertex_t generate() const;
        bool done() const noexcept;
        void next();
 
    private:
        explicit vertices_t(const parametric_shape_t& shape);
 
        const parametric_shape_t* shape_;
 
        int i_;
 
        friend class parametric_shape_t;
    };
 
    explicit parametric_shape_t(const std::function<shape_vertex_t(double)>& eval, int segments = 16) noexcept;
 
    edges_t edges() const noexcept;
 
    vertices_t vertices() const noexcept;
 
private:
    std::function<shape_vertex_t(double)> eval_;
 
    int segments_;
 
    double delta_;
};
} // namespace generator
 
#endif