Time for action – creating explosions

1. Add the RandomDirection() helper method to the ExplosionManager class:

   public Vector2 randomDirection(float scale)
   {
       Vector2 direction;
       do
       {
           direction = new Vector2(
           rand.Next(0, 101) - 50,
           rand.Next(0, 101) - 50);
       } while (direction.Length() == 0);
       direction.Normalize();
       direction *= scale;
   
       return direction;
   }

2. Add the AddExplosion() method to the ExplosionManager class:

   public void AddExplosion(Vector2 location, Vector2 momentum)
   {
       Vector2 pieceLocation = location -
           new Vector2(pieceRectangles[0].Width/2,
               pieceRectangles[0].Height/2);
   
       int pieces = rand.Next(minPieceCount, maxPieceCount + 1);
       for (int x = 0; x < pieces; x++)
       {
           ExplosionParticles.Add(new Particle(
               pieceLocation,
               texture,
               pieceRectangles[rand.Next(0,pieceRectangles.Count)],
               randomDirection(pieceSpeedScale) + momentum,
               Vector2.Zero...