public static int CompareGame3DComponentsByZ(Game3DComponent a, Game3DComponent b)
 {
     return((int)(100 * (a.position_.Z - b.position_.Z)));
 }
 public void Add(Game3DComponent component)
 {
     components.Add(component);
 }
 public void Remove(Game3DComponent component)
 {
     components.Remove(component);
 }
 public static int CompareGame3DComponentsByZ(Game3DComponent a, Game3DComponent b)
 {
     return (int)(100*(a.position_.Z - b.position_.Z));
 }