public void Draw <TSurface, TSource>(ScreenRenderer <TSurface, TSource> screenRenderer)
{
//Console.WriteLine("render");
Systems.InvokeRender(screenRenderer);
}
/// <summary>
/// Called when the scene should draw itself
/// </summary>
/// <typeparam name="TSurface">The screen renderer's Surface type</typeparam>
/// <typeparam name="TSource">The screen renderer's Source type</typeparam>
/// <param name="screenRenderer">The screen renderer onto which to draw the scene</param>
public void Draw <TSurface, TSource>(ScreenRenderer <TSurface, TSource> screenRenderer)
{
Systems.Flush();
Systems.InvokeRender(screenRenderer);
}