Time for action – creating the CollisionManager class

1. Add a new class called CollisionManager to the AsteroidBeltAssault class.

2. Add declarations to the CollisionManager class:

   Private _asteroidManager As AsteroidManager
   Private _playerManager As PlayerManager
   Private _enemyManager as EnemyManager
   Private _explosionManager As ExplosionManager
   Private offScreen As Vector2 = new Vector2(-500, -500)
   Private shotToAsteroidImpact As Vector2 = new Vector2(0, -20)
   Private enemyPointValue As Integer = 100

3. Add a constructor to the CollisionManager class:

   Public Sub New(
       asteroidManager As AsteroidManager,
       playerManager As PlayerManager,
       enemyManager As EnemyManager,
       explosionManager As ExplosionManager)
   
       _asteroidManager = asteroidManager
       _playerManager = playerManager
       _enemyManager = enemyManager
       _explosionManager = explosionManager
   End Sub

What just happened?

Because it will be comparing various objects against each other, the CollisionManager needs to know about most of...