public static void Update()
{
//ships spawn
shipSpawnCounter -= Game.DeltaTime;
if (shipSpawnCounter <= 0)
{
shipSpawnCounter = RandomGenerator.GetRandom(3, 5);
int choice = RandomGenerator.GetRandom(0, 100);
EnemyShip newShip = null;
if (choice < 60)
{
choice = 0;
}
else
{
choice = 1;
}
newShip = shipsPool[choice].Dequeue();
SetRandomPosition(newShip);
newShip.IsActive = true;
}
//power up spawn
powerUpSpawnCounter -= Game.DeltaTime;
if (powerUpSpawnCounter <= 0)
{
powerUpSpawnCounter = RandomGenerator.GetRandom(8, 15);
PowerUp p = GetRandomPowerUp();
if (p != null)
{
SetRandomPosition(p);
p.IsActive = true;
}
}
}
public static void Restore(PowerUp item)
{
item.IsActive = false;
powerUpList.Add(item);
}