public void OnStoppedFollowing()
{
entity_toFollow = null;
direction = Vector2.Zero;
State = STATE_CmpAI_Follower.NoneToFollow;
if (StoppedFollowing != null) // there is a hook
{
StoppedFollowing.Invoke(this.parent, new EntityArgs(this.parent, this));
}
}
protected void OnDestinationReached()
{
destination_set = false;
entity_toFollow = null;
direction = Vector2.Zero;
State = STATE_CmpAI_Follower.NoneToFollow;
if (DestinationReached != null)
{
DestinationReached.Invoke(this, new EntityArgs(this.parent, this));
}
}
public override void Update(float delta)
{
if (destination_set)
{
direction = (Vector2.Normalize(Vector2.Subtract(destination, parent.GetCenterPosition())));
pos_previous = parent.GetCenterPosition();
parent.pos += (direction * speed);
if (GetDistanceFromDestination() < 1f)
{
OnDestinationReached();
}
CheckIfStuck(destination);
}
else if (entity_toFollow != null)
{
float dist = GetDistance();
if (dist > distance_whenToSeparate) // if distance is big enough to separate
{
State = STATE_CmpAI_Follower.NoneToFollow;
}
else if (dist > distance_whenToFollow) // if distance is big enough to follow but not separate
{
direction = (Vector2.Normalize(Vector2.Subtract(entity_toFollow.GetCenterPosition(), parent.GetCenterPosition())));
parent.pos += (direction * speed);
State = STATE_CmpAI_Follower.Following;
}
}
else
{
// State check before invoke, to prevent invoking event every frame
if (State != STATE_CmpAI_Follower.NoneToFollow)
{
OnStoppedFollowing();
}
}
}
public void RemoveLeader()
{
this.State = STATE_CmpAI_Follower.NoneToFollow;
}
public void SetLeader(Entity entity)
{
entity_toFollow = entity;
this.State = STATE_CmpAI_Follower.Following;
}
