public static void MoveAlienBullets(AlienBulletListModel alienBulletsList)
{
foreach (var alienBullet in alienBulletsList.AlienBullets)
{
alienBullet.ShuntPosition();
}
}
public static void CheckIfShipShot(double gameTimeSeconds, ShipModel ship, AlienListModel aliensList, AlienBulletListModel alienBulletList, ExplosionListModel explosions, GameSounds gameSounds)
{
if (!ship.IsDestroyed)
{
bool shipDestroyed =
alienBulletList.AlienBullets.Exists(b => CollisionDetection.Hits(b.CentrePoint, ship.CentrePoint, CollisionDetectRange)) ||
aliensList.Aliens.Exists(a => CollisionDetection.Hits(a.CentrePoint, ship.CentrePoint, CollisionDetectRange));
if (shipDestroyed)
{
DestroyShip(gameTimeSeconds, ship, explosions, gameSounds);
}
}
}
public static void CauseAlienToFire(AlienModel alien, AlienBulletListModel alienBulletList, GameSounds gameSounds) // Quiz: What future purpose have I catered for by separating this out? If you can guess, how could that purpose be fulfilled?
{
alienBulletList.AlienBullets.Add(new AlienBulletModel(alien.CentrePoint.ShuntedBy(-AlienModel.AlienWidth, 0)));
gameSounds.EnemyFiringSound.Play();
}
public static void ConsiderAddingAlien(double gameTimeSeconds, ShipModel ship, AlienListModel alienList, Random randomGenerator, AlienBulletListModel alienBulletList, GameSounds gameSounds)
{
if (!ship.IsDestroyed) // Quiz: Why not add aliens in the period while the ship is "destroyed"?
{
ConsiderAddingAlienAndThen(gameTimeSeconds, alienList, randomGenerator, alien =>
{
if (randomGenerator.Next(0, 100) > AlienModel.PercentChangeAlienFiresWhenCreated) // Quiz: Does my hard-coded constant really 100 matter here? Is this bad practice?
{
CauseAlienToFire(alien, alienBulletList, gameSounds);
}
});
}
}
public static void RemoveOffScreenObjects(AlienListModel aliensList, ShipBulletListModel shipBulletList, AlienBulletListModel alienBulletList, StarscapeModel starList, ScoreModel scoring)
{
shipBulletList.ShipBullets.RemoveAll(b => b.CentrePoint.x > RetroScreen.WidthInPixels);
alienBulletList.AlienBullets.RemoveAll(b => b.CentrePoint.x < 0);
starList.Stars.RemoveAll(s => s.CentrePoint.x < 0);
int numberOfAliensRemoved = aliensList.Aliens.RemoveAll(a => a.CentrePoint.x < 0);
scoring.SetScore(Math.Max(0, scoring.Score - numberOfAliensRemoved));
}
