parametric_mesh.hpp

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#ifndef GENERATOR_PARAMETRICMESH_HPP
#define GENERATOR_PARAMETRICMESH_HPP
 
#include <functional>
 
#include "mesh_vertex.hpp"
#include "triangle.hpp"
 
namespace generator
{
 
class parametric_mesh_t
{
public:
    class triangles_t
    {
    public:
        triangle_t generate() const;
        bool done() const noexcept;
        void next();
 
    private:
        explicit triangles_t(const parametric_mesh_t& mesh);
 
        const parametric_mesh_t* mesh_;
 
        gml::ivec2 i_;
 
        bool even_;
 
        friend class parametric_mesh_t;
    };
 
    class vertices_t
    {
    public:
        mesh_vertex_t generate() const;
        bool done() const noexcept;
        void next();
 
    private:
        explicit vertices_t(const parametric_mesh_t& mesh);
 
        const parametric_mesh_t* mesh_;
 
        gml::ivec2 i_;
 
        friend class parametric_mesh_t;
    };
 
    explicit parametric_mesh_t(const std::function<mesh_vertex_t(const gml::dvec2& t)>& eval,
                               const gml::ivec2& segments = {16, 16}) noexcept;
 
    triangles_t triangles() const noexcept;
 
    vertices_t vertices() const noexcept;
 
private:
    std::function<mesh_vertex_t(const gml::dvec2& t)> eval_;
 
    gml::ivec2 segments_;
 
    gml::dvec2 delta_;
};
} // namespace generator
 
#endif