private:
void create_coords(float, float, float, float, float, std::vector<float> &) const;
void create_texcoords(float, float, float, float, float, std::vector<float> &) const;
private:
void create_coords(float, float, float, float, float, std::vector<float> &) const;
void create_texcoords(float, float, float, float, float, std::vector<float> &) const;