//Note that AISTATES are never directly part of lists,
//and exist as fields of an AI. Thus, this will only
// ever be called by its AI parent.
public override void Update(GameTime gt)
{
if (Moving)
{
Body.Go();
if (MoveTarget != null)
{
if (!MoveTarget.IsDestroyed())
Body.SetHeading(PointAt(MoveTarget));
else
MoveTarget = null;
}
}
else
Body.Stop();
if (Shooting)
{
Body.Shoot();
if (ShootTarget != null)
{
if (!ShootTarget.IsDestroyed())
Body.SetWeaponHeadings(PointAt(ShootTarget));
else
ShootTarget = null;
}
}
else
Body.HoldFire();
}
public void SetMoveTarget(Target t)
{
if (MoveTarget == null)
MoveTarget = t;
}
public void SetShootTarget(Target t)
{
if (ShootTarget == null)
ShootTarget = t;
}
/* This method returns the apropriate heading for the
* actor to "point" at the given target.
*/
private double PointAt(Target t)
{
var tp = t.GetPosition();
var bp = Body.GetPosition();
double dir = Math.Atan2(tp.Y - bp.Y, tp.X - bp.X);
return dir;
}