public static void MoveShipBullets(ShipBulletListModel shipBulletsList)
{
foreach (var shipBullet in shipBulletsList.ShipBullets)
{
shipBullet.ShuntPosition();
}
}
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));
}
public static void ConsiderPlayerFiring(double gameTimeSeconds, Input input, ShipBulletListModel shipBulletList, ShipModel ship, GameSounds gameSounds)
{
if (!ship.IsDestroyed && input.Fire.JustDown)
{
var elapsedTime = gameTimeSeconds - ship.MostRecentPlayerFiringTime;
if (elapsedTime > ShipModel.MinFiringIntervalForPlayer)
{
shipBulletList.ShipBullets.Add(new ShipBulletModel(ship.CentrePoint.ShuntedBy(ship.Width, 0)));
ship.MostRecentPlayerFiringTime = gameTimeSeconds; // Quiz: Why are we doing this?
gameSounds.PlayerFiringSound.Play();
}
}
}
public static void CheckIfAlienShot(double gameTimeSeconds, AlienListModel alienList, ShipBulletListModel shipBulletsList, ExplosionListModel explosionsList, ScoreModel Scoring, GameSounds gameSounds)
{
CheckIfAlienShotAndThen(
gameTimeSeconds, alienList, shipBulletsList, alien =>
{
AddExplosion(gameTimeSeconds, alien.CentrePoint, explosionsList, gameSounds);
Scoring.SetScore(Scoring.Score + 1);
});
}
public static void CheckIfAlienShotAndThen(double gameTimeSeconds, AlienListModel alienList, ShipBulletListModel shipBulletsList, Action <AlienModel> andThen)
{
var bulletsToRemove = new List <ShipBulletModel>();
var aliensToRemove = new List <AlienModel>();
foreach (var bullet in shipBulletsList.ShipBullets)
{
foreach (var alien in alienList.Aliens)
{
if (CollisionDetection.Hits(bullet.CentrePoint, alien.CentrePoint, CollisionDetectRange)) // Quiz: This design means hitting NEAR the centre of the alien!
{
bulletsToRemove.Add(bullet);
aliensToRemove.Add(alien);
andThen(alien);
}
}
}
alienList.Aliens.RemoveAll(a => aliensToRemove.Contains(a));
shipBulletsList.ShipBullets.RemoveAll(b => bulletsToRemove.Contains(b));
}