/// <summary>
/// drawing a single object all over the screen
/// </summary>
/// <param name="d"></param>
public static void DrawSingle(DrawObj d)
{
grd.Viewport = new Viewport(0, 0, Tools.W, Tools.H);
grd.Clear(Color.CornflowerBlue);
Tools.sb.Begin(SpriteSortMode.BackToFront, BlendState.AlphaBlend,
null, null, null, null, null);
d.draw();
Tools.sb.End();
}
