#ifndef slic3r_GLModel_hpp_
#define slic3r_GLModel_hpp_

#include "libslic3r/Point.hpp"
#include "libslic3r/BoundingBox.hpp"
#include <vector>
#include <string>

namespace Slic3r {

class TriangleMesh;

namespace GUI {

    struct GLModelInitializationData
    {
        std::vector<Vec3f> positions;
        std::vector<Vec3f> normals;
        std::vector<Vec3i> triangles;
    };

    class GLModel
    {
        unsigned int m_vbo_id{ 0 };
        unsigned int m_ibo_id{ 0 };
        size_t m_indices_count{ 0 };

        BoundingBoxf3 m_bounding_box;
        std::string m_filename;

    public:
        virtual ~GLModel() { reset(); }

        void init_from(const GLModelInitializationData& data);
        void init_from(const TriangleMesh& mesh);
        bool init_from_file(const std::string& filename);
        void reset();
        void render() const;

        const BoundingBoxf3& get_bounding_box() const { return m_bounding_box; }

        const std::string& get_filename() const { return m_filename; }

    private:
        void send_to_gpu(const std::vector<float>& vertices, const std::vector<unsigned int>& indices);
    };


    // create an arrow with cylindrical stem and conical tip, with the given dimensions and resolution
    // the origin of the arrow is in the center of the stem cap
    // the arrow has its axis of symmetry along the Z axis and is pointing upward
    GLModelInitializationData stilized_arrow(int resolution, float tip_radius, float tip_height, float stem_radius, float stem_height);

    // create an arrow whose stem is a quarter of circle, with the given dimensions and resolution
    // the origin of the arrow is in the center of the circle
    // the arrow is contained in the 1st quadrant of the XY plane and is pointing counterclockwise
    GLModelInitializationData circular_arrow(int resolution, float radius, float tip_height, float tip_width, float stem_width, float thickness);

    // create an arrow with the given dimensions
    // the origin of the arrow is in the center of the stem cap
    // the arrow is contained in XY plane and has its main axis along the Y axis
    GLModelInitializationData straight_arrow(float tip_width, float tip_height, float stem_width, float stem_height, float thickness);

} // namespace GUI
} // namespace Slic3r

#endif // slic3r_GLModel_hpp_