public void CleanTemporaryGameLists()//gameobject lists are cleaned up
{
GameDisplay.Children.Clear();
//lists are updated
EnemyProjectiles = EnemyProjectiles.Except(TemporaryEnemyProjectiles).ToList();
PlayerProjectiles = PlayerProjectiles.Except(TemporaryPlayerProjectiles).ToList();
Ufos = Ufos.Except(TemporaryUfos).ToList();
Walls = Walls.Except(TemporaryWalls).ToList();
Invaders = Invaders.Except(TemporaryInvaders).ToList();
//temporary lists are cleared
TemporaryWalls.Clear();
TemporaryPlayerProjectiles.Clear();
TemporaryInvaders.Clear();
TemporaryEnemyProjectiles.Clear();
TemporaryUfos.Clear();
}
private void CheckEnemyProjectileCollision()//discovers collisions between enemy projectiles and other gameobjects
{
foreach (EnemyProjectile EnemyProjectile in EnemyProjectiles)
{
foreach (Wall wall in Walls)
{
if (wall.IsHit(EnemyProjectile.X, EnemyProjectile.Y + 10))
{
TemporaryEnemyProjectiles.Add(EnemyProjectile); //removes enemy projectile
TemporaryWalls.Add(wall); //removes wall
}
}
if (Player.IsHit(EnemyProjectile.X, EnemyProjectile.Y))
{
Player.HealthPoints--; //removes one player life
TemporaryEnemyProjectiles.Add(EnemyProjectile); //removes enemy projectile
}
if (EnemyProjectile.Y > GameDisplay.ActualHeight)
{
TemporaryEnemyProjectiles.Add(EnemyProjectile);//removes enemy projectile
}
}
}
