Time for action – creating the Enemy class

1. Add a new class called Enemy to the Asteroid Belt Assault project.

2. Add the standard using directives to the class:

   using Microsoft.Xna.Framework;
   using Microsoft.Xna.Framework.Graphics;

3. Add declarations to the Enemy class:

   public Sprite EnemySprite;
   public Vector2 gunOffset = new Vector2(25, 25);
   private Queue<Vector2> waypoints = new Queue<Vector2>();
   private Vector2 currentWaypoint = Vector2.Zero;
   private float speed = 120f;
   public bool Destroyed = false;
   private int enemyRadius = 15;
   private Vector2 previousLocation = Vector2.Zero; 

4. Add a constructor to the Enemy class:

   public Enemy(
       Texture2D texture,
       Vector2 location,
       Rectangle initialFrame,
       int frameCount)
   {
       EnemySprite = new Sprite(
           location, 
           texture, 
           initialFrame, 
           Vector2.Zero);
   
       for (int x = 1; x < frameCount; x++)
       {
           EnemySprite.AddFrame(
               new Rectangle(
               initialFrame.X = (initialFrame...