A Bullets Collection

For the bullets, there's really nothing else left to do; however, you will probably store numerous bullets to render and update throughout the game play. It is probably useful to have a collection class to store the bullets in. Go ahead and add the Bullets class (in Listing 15.7) to this same code file.

Listing 15.7. The Bullets Collection

 /// <summary> /// A collection of bullets /// </summary> public class Bullets : IEnumerable {     private ArrayList bulletList = new ArrayList();     /// <summary>     /// Indexer for bullets     /// </summary>     public Bullet this[int index]     {         get { return bulletList[index] as Bullet; }         set { bulletList[index] = value; }     }     /// <summary>     /// Add a new bullet to the list     /// </summary>     public void Add(Bullet b)     {         bulletList.Add(b);     }     /// <summary>     /// Remove a bullet from the list     /// </summary>     public void Remove(Bullet b)     {         bulletList.Remove(b);     }     /// <summary>     /// Remove all bullets from the list     /// </summary>     public void Clear()     {         bulletList.Clear();     }     /// <summary>     /// The number of items in the list     /// </summary>     public int Count     {         get { return bulletList.Count; }     }     /// <summary>     /// Returns the enumerator for the bullet list     /// </summary>     public IEnumerator GetEnumerator()     {         return bulletList.GetEnumerator();     } } 

As you can see, this is a simple wrapper around an array list that makes it typesafe for a Bullet class instead. Only the items that you actually care about are implemented (instead of the entire thing). There isn't anything overly complex here.