public override void Update(GameTime gameTime)
{
float timeDelta = (float)gameTime.ElapsedGameTime.TotalSeconds;
float range = 30.0f;
timeShot += timeDelta;
float fov = MathHelper.PiOver4;
// Can I see the leader?
Fighter leader = XNAGame.Instance.Leader;
if ((leader.Position - Entity.Position).Length() > range)
{
// Is the leader inside my FOV
AIFighter fighter = (AIFighter)Entity;
fighter.SwicthState(new IdleState(fighter));
}
else
{
float angle;
Vector3 toEnemy = (leader.Position - Entity.Position);
toEnemy.Normalize();
angle = (float)Math.Acos(Vector3.Dot(toEnemy, Entity.Look));
if (angle < fov)
{
if (timeShot > 0.25f)
{
Lazer lazer = new Lazer();
lazer.Position = Entity.Position;
lazer.Look = Entity.Look;
XNAGame.Instance.Children.Add(lazer);
timeShot = 0.0f;
}
}
}
}
public override void Update(GameTime gameTime)
{
float range = 30.0f;
// Can I see the leader?
Fighter leader = XNAGame.Instance.Leader;
if ((leader.Position - Entity.Position).Length() < range)
{
// Is the leader inside my FOV
AIFighter fighter = (AIFighter)Entity;
fighter.SwicthState(new AttackingState(fighter));
}
}
public static void setUpStateMachineDemo()
{
List<Entity> children = XNAGame.Instance().Children;
Ground ground = new Ground();
children.Add(ground);
XNAGame.Instance().Ground = ground;
AIFighter aiFighter = new AIFighter();
aiFighter.pos = new Vector3(-20, 50, 50);
aiFighter.maxSpeed = 16.0f;
aiFighter.SwicthState(new IdleState(aiFighter));
aiFighter.Path.DrawPath = true;
children.Add(aiFighter);
Fighter fighter = new Fighter();
fighter.ModelName = "ship2";
fighter.SteeringBehaviours.turnOn(SteeringBehaviours.behaviour_type.arrive);
fighter.SteeringBehaviours.turnOn(SteeringBehaviours.behaviour_type.obstacle_avoidance);
fighter.SteeringBehaviours.turnOn(SteeringBehaviours.behaviour_type.wall_avoidance);
fighter.pos = new Vector3(10, 50, 0);
fighter.targetPos = aiFighter.pos + new Vector3(-50, 0, -80);
children.Add(fighter);
Fighter camFighter = new Fighter();
camFighter.Leader = fighter;
camFighter.offset = new Vector3(0, 5, 10);
camFighter.pos = fighter.pos + camFighter.offset;
camFighter.SteeringBehaviours.turnOn(SteeringBehaviours.behaviour_type.offset_pursuit);
camFighter.SteeringBehaviours.turnOn(SteeringBehaviours.behaviour_type.wall_avoidance);
camFighter.SteeringBehaviours.turnOn(SteeringBehaviours.behaviour_type.obstacle_avoidance);
XNAGame.Instance().CamFighter = camFighter;
children.Add(camFighter);
XNAGame.Instance().Leader = fighter;
Camera camera = XNAGame.Instance().Camera;
camera.pos = new Vector3(0.0f, 60.0f, 100.0f);
}