private static void DestroySDL(ref IntPtr win, ref IntPtr ren)
{
scene.Dispose();
if (ren != IntPtr.Zero)
{
SDL.SDL_DestroyRenderer(ren);
ren = IntPtr.Zero;
}
if (win != IntPtr.Zero)
{
SDL.SDL_DestroyWindow(win);
win = IntPtr.Zero;
}
SDL_image.IMG_Quit();
SDL.SDL_Quit();
}