void	clear_window(PRGEWindow wnd, V3 clear_color);
void	begin3d(PRGEWindow wnd, Shader shader, Camera camera);
void	end3d(void);
void	begin3d_alpha(PRGEWindow wnd, Shader shader, Camera camera);
void	end3d_alpha(void);

void	draw_mesh(Mesh mesh);
void	draw_model(Shader shader, Model model);