Time for action – the GameManager class

1. Add a new class called GameManager to the Robot Rampage project.

2. Add the following using directive to the top of the GameManager class:

   using Microsoft.Xna.Framework;

3. Modify the declaration of the class to make it a static class:

   static class GameManager

4. Add declarations to the GameManager class:

   #region Declarations
   public static int Score = 0;
   public static int CurrentWave = 0;
   public static int BaseTerminalCount = 8;
   public static int MaxTerminalCount = 15;
   public static int CurrentTerminalCount = 8;
   public static Vector2 PlayerStartLoc = new Vector2(32, 32);
   #endregion

5. Add public methods to the GameManager class:

   #region Public Methods
   public static void StartNewWave()
   {
       CurrentWave++;
       if (CurrentTerminalCount < MaxTerminalCount)
       {
           CurrentTerminalCount++;
       }
   
       Player.BaseSprite.WorldLocation = PlayerStartLoc;
       Camera.Position = Vector2.Zero;
       WeaponManager.CurrentWeaponType = 
           WeaponManager.WeaponType.Normal;...