/// <summary>
/// Updates the Green Goblin ship
/// </summary>
/// <param name="elapsedTime">The in-game time between the previous and current frame</param>
public override void Update(float elapsedTime)
{
// Sense the Player's position
PlayerShip Player = ScrollingShooterGame.Game.Player;
Vector2 PlayerPosition = new Vector2(Player.Bounds.Center.X, Player.Bounds.Center.Y);
gunTimer += elapsedTime;
// Get the distance between the Player and this along the X axis
float PlayerDistance = Math.Abs(PlayerPosition.X - this.position.X);
// Make sure the Player is within range
if (PlayerDistance < 60 && gunTimer > 0.20 && PlayerPosition.Y > (this.position.Y + 30))
{
ScrollingShooterGame.GameObjectManager.CreateProjectile(ProjectileType.EnemyFlameball, position);
gunTimer = 0;
}
//Ship flies from top to bottom
this.position.Y += 1;
// If the ship hasn't reached the turning point
if (diagCount < diagFlightLength)
{
//If the ship has just been created
if (0 == steeringState.CompareTo(GreenGoblinSteeringState.Straight))
{
this.position.X += 2;
steeringState = GreenGoblinSteeringState.Right;
diagCount++;
}
// If the ship is going right
else if (0 == steeringState.CompareTo(GreenGoblinSteeringState.Right))
{
this.position.X += 2;
diagCount++;
}
// If the ship is going left
else if (0 == steeringState.CompareTo(GreenGoblinSteeringState.Left))
{
this.position.X -= 2;
diagCount++;
}
}
// Once diagonal motion has reach its length, switch directions
else if (diagCount == diagFlightLength)
{
// If going right, switch to left
if (0 == steeringState.CompareTo(GreenGoblinSteeringState.Right))
{
this.position.X -= 1;
steeringState = GreenGoblinSteeringState.Left;
diagCount = 0;
diagFlightLength = rand.Next(20, 150);
}
// If going left, switch to right
else if (0 == steeringState.CompareTo(GreenGoblinSteeringState.Left))
{
this.position.X += 1;
steeringState = GreenGoblinSteeringState.Right;
diagCount = 0;
diagFlightLength = rand.Next(20, 150);
}
}
else
{
steeringState = GreenGoblinSteeringState.Straight;
}
}
