XNA 4.0 Game Development by Example Beginner's Guide

Time for action – using the CollisionManager class

1. Add the CheckCollisions() method to the CollisionManager class:

   public void CheckCollisions()
   {
       checkShotToEnemyCollisions();
       checkShotToAsteroidCollisions();
       if (!playerManager.Destroyed)
       {
           checkShotToPlayerCollisions();
           checkEnemyToPlayerCollisions();
           checkAsteroidToPlayerCollisions();
       }
   }

2. Add a declaration for the CollisionManager to the Game1 declarations area:

   CollisionManager collisionManager;

3. Initialize the CollisionManager in the LoadContent() method of the Game1 class, after the ExplosionManager has been initialized:

   collisionManager = new CollisionManager(
       asteroidManager,
       playerManager,
       enemyManager,
       explosionManager);

4. In the Game1 class' Update() method, in the GameStates.Playing section, ...