/// <summary>
/// Update this AI instance.
/// </summary>
/// <param name="wo">WorldObject controlled by this AI instance
/// </param>
/// <param name="lev">Currently active level</param>
public override void Update(WorldObject wo, Level lev)
{
// If the player is dead then do not update and stop motion
if (lev.Player.Dead)
{
wo.Stand();
wo.VelocityX = 0.0F;
wo.VelocityY = 0.0F;
return;
}
// Update the timers
CurFireTime += GameMain.SecondsPerFrame;
CurDuckTime += GameMain.SecondsPerFrame;
// If attacking then let it finish
if (wo.State == WorldObject.AnimationState.Attack)
{
return;
}
// Distance to any incoming shots
float shotDistX = 0.0F;
float shotDistY = 0.0F;
// Cache some parameters
Player p = lev.Player;
float deltaPlayerX = p.WorldX - wo.WorldX;
float deltaPlayerY = p.WorldY - wo.WorldY;
// Check if the world object should evade a shot
if (!CheckDuck(wo, lev, ref shotDistX, ref shotDistY))
{
if (wo.State != WorldObject.AnimationState.Duck &&
Math.Abs(deltaPlayerX) <= MaxX &&
CurFireTime >= CurFireRate)
{
// If the player is within range, the world object is not
// ducking, and it is time to fire then shoot at the
// player
CurFireTime = 0;
CurFireRate = (FireRateMin + GameMain.Random() *
(FireRateMax - FireRateMin));
wo.Attack();
wo.VelocityX = 0.0F;
}
else if (wo.State != WorldObject.AnimationState.Duck)
{
// Walk toward the player if not overlapping
// Overlapping can only occur when collisions are off
if (deltaPlayerX > 5.0F)
{
wo.Walk();
wo.VelocityX = VelocityX;
wo.FlipX();
}
else if (deltaPlayerX < -5.0F)
{
wo.Walk();
wo.VelocityX = -VelocityX;
wo.UnflipX();
}
else
{
wo.Stand();
wo.VelocityX = 0.0F;
}
}
}
else
{
// Stop all movement if ducking
wo.VelocityX = 0.0F;
}
}
/// <summary>
/// Initialize this instance of AI.
/// </summary>
/// <param name="wo">WorldObject controlled by this AI instance
/// </param>
/// <param name="lev">Currently active level</param>
public override void Init(WorldObject wo, Level lev)
{
wo.Stand();
CurFireRate = (FireRateMin +
GameMain.Random() * (FireRateMax - FireRateMin));
}
