/// <summary>
/// Creates a new instance of an <c>AsteroidBoss</c>.
/// </summary>
/// <param name="players"></param>
/// <param name="health"></param>
public AsteroidBoss(Player[] players, int health) : base(players)
{
asteroidTextures = new Texture2D[5];
for (int i = 0; i < asteroidTextures.Length; i++)
{
asteroidTextures[i] = CurrentStage.Content.Load <Texture2D>("Asteroid" + i);
}
stage = AsteroidBossStage.APPEARING;
blank = CurrentStage.Content.Load <Texture2D>("Blank");
Health = health;
MAX_HEALTH = health;
rand = new Random();
}
public override void Update(GameTime gameTime)
{
float dt = (float)gameTime.ElapsedGameTime.TotalMilliseconds;
timer += dt;
spawnTimer += dt;
spawnTimer2 += dt;
if (Health <= 0)
{
stage = AsteroidBossStage.DYING;
}
switch (stage)
{
case AsteroidBossStage.APPEARING:
if (Position.Y < 200)
{
Velocity = new Vector2(0, 200);
}
else
{
timer = 0;
stage = AsteroidBossStage.FIRING;
}
break;
case AsteroidBossStage.FIRING:
if (spawnTimer > 300f)
{
spawnTimer = 0;
for (int i = 0; i < Players.Length; i++)
{
if (Players[i] != null)
{
float scale = (float)(rand.NextDouble() * (SCALE - 3) + 3f);
float speed = 1600 / (float)Math.Sqrt(scale);
float angle = GetAngleBetweenSprite(Players[i]);
Vector2 dir = new Vector2((float)Math.Cos(angle), (float)Math.Sin(angle));
Texture2D aster = asteroidTextures[rand.Next(0, 5)];
Asteroid a = new Asteroid(Bullet.EntitySide.ENEMY, 7000f, dir * speed)
{
Texture = aster,
Position = Position,
Size = new Point((int)(aster.Width * scale), (int)(aster.Height * scale)),
Health = (int)(Math.Ceiling(scale / 2)),
Color = Color.White,
InitVelocity = dir * speed,
};
CurrentStage.AddBullet(a);
}
}
if (timer > 10000)
{
timer = 0;
stage = AsteroidBossStage.HIDING;
}
}
break;
case AsteroidBossStage.HIDING:
if (Position.Y > -300)
{
Velocity = new Vector2(0, -200);
}
else
{
if (spawnTimer > 60f)
{
spawnTimer = 0;
Vector2 pos = new Vector2(rand.Next(-100, ScreenManager.GetInstance().Width + 100), -90);
float scale = (float)(rand.NextDouble() * (SCALE - 3) + 3f);
float speed = 1000 / (float)Math.Sqrt(scale);
Texture2D aster = asteroidTextures[rand.Next(0, 5)];
float xSpeed = (float)((rand.NextDouble() - 0.5f) * 100f);
float iRot = (float)(rand.NextDouble() * MathHelper.TwoPi);
Asteroid a = new Asteroid(Bullet.EntitySide.ENEMY, 7000f, new Vector2(xSpeed, speed))
{
Texture = aster,
Position = pos,
Size = new Point((int)(aster.Width * scale), (int)(aster.Height * scale)),
Health = (int)(Math.Ceiling(scale / 2)),
Color = Color.White,
InitVelocity = new Vector2(xSpeed, speed),
Rotation = iRot,
};
Bullets.Add(a);
}
if (timer > 14000)
{
timer = 0;
stage = AsteroidBossStage.APPEARING;
}
}
break;
case AsteroidBossStage.DYING:
Velocity = new Vector2(0, -100);
if (Position.Y < -200)
{
IsActive = false;
}
break;
}
if (Health <= 0)
{
stage = AsteroidBossStage.DYING;
}
if (stage != AsteroidBossStage.HIDING && Position.Y > 0)
{
CheckBulletCollision();
}
if (Health / MAX_HEALTH < 0.4f)
{
if (spawnTimer2 > 800)
{
spawnTimer2 = 0;
Vector2 pos = new Vector2(rand.Next(-100, ScreenManager.GetInstance().Width + 100), -90);
float scale = (float)(rand.NextDouble() * (SCALE - 3) + 3f);
float speed = 1000 / (float)Math.Sqrt(scale);
Texture2D aster = asteroidTextures[rand.Next(0, 5)];
float xSpeed = (float)((rand.NextDouble() - 0.5f) * 100f);
Asteroid a = new Asteroid(Bullet.EntitySide.ENEMY, 7000f, new Vector2(xSpeed, speed))
{
Texture = aster,
Position = pos,
Size = new Point((int)(aster.Width * scale), (int)(aster.Height * scale)),
Health = (int)Math.Ceiling(scale / 2),
Color = Color.White,
InitVelocity = new Vector2(xSpeed, speed),
};
Bullets.Add(a);
}
}
Rotation += dt / 10000 * MathHelper.TwoPi;
Position += Velocity * (float)gameTime.ElapsedGameTime.TotalSeconds;
Velocity = Vector2.Zero;
}
