public int Update(GameWindow window, GameTime gameTime)
{
closestLength = 100000;
closestEnemy = null;
foreach (Enemy enemy in Enemies.ToArray())
{
if ((enemy.Center - player.Center).Length() < closestLength && enemy.Y < player.Y && !enemy.IsDying)
{
closestLength = (enemy.Position - player.Position).Length();
closestEnemy = enemy;
}
foreach (Projectile bullet in player.Bullets)
if (enemy.IsColliding(bullet) && bullet.Y > 0 && enemy.IsAlive && bullet.IsAlive)
{
enemy.Health--;
bullet.Health--;
}
if (enemy.IsAlive && enemy.IsColliding(player))
{
player.Health--;
enemy.Health--;
}
enemy.Update(window);
}
return !player.IsAlive
? (int) Level.LevelState.GameOver
: (player.Pause ? (int) Level.LevelState.Pause : (int) Level.LevelState.Active);
}
public static Formation VShape(Vector2 position, float angle, int spacing, int numLayers, Enemy enemy)
{
Formation v = new Formation();
v.Add(Enemy.Standard(position, enemy.Speed));
float dY = (float)Math.Sin(angle) * spacing;
float dX = (float)Math.Cos(angle) * spacing;
for (int i = 1; i < numLayers; i++)
{
enemy = Enemy.Standard(new Vector2(position.X + i * dX, position.Y - i * dY), enemy.Speed);
v.Add(enemy);
enemy = Enemy.Standard(new Vector2(position.X - i * dX, v.Last.Y), enemy.Speed);
v.Add(enemy);
}
return v;
}
private void Add(Enemy e)
{
Enemies.Add(e);
}
public static Enemy Standard(Vector2 position, Vector2 speed, VectorUpdate positionUpdate)
{
Enemy e = new Enemy(new Animation(StandardTexture, 1F, true, StandardTexture.Width), position, speed, Destruction, positionUpdate, (sender) => sender.IsAlive ? sender.Speed : Vector2.Zero);
return e;
}