Time for action – building explosions

1. Add the AddExplosion() method to the "Public Methods" region of the EffectsManager class:

   public static void AddExplosion(
       Vector2 location, 
       Vector2 momentum,
       int minPointCount,
       int maxPointCount,
       int minPieceCount,
       int maxPieceCount,
       float pieceSpeedScale,
       int duration,
       Color initialColor,
       Color finalColor)
   {
       float explosionMaxSpeed = 30f;
       int pointSpeedMin = (int)pieceSpeedScale * 2;
       int pointSpeedMax = (int)pieceSpeedScale * 3;
   
       Vector2 pieceLocation = location -
           new Vector2(ExplosionFrames[0].Width / 2,
               ExplosionFrames[0].Height / 2);
   
       int pieces = rand.Next(minPieceCount, maxPieceCount + 1);
       for (int x = 0; x < pieces; x++)
       {
           Effects.Add(new Particle(
               pieceLocation,
               Texture,
               ExplosionFrames[rand.Next(0, ExplosionFrames.Count)],
               randomDirection(pieceSpeedScale) + momentum,
               Vector2.Zero,
     ...