public override void Activate()
{
Status = StatusTypes.Active;
// if this goal is reactivated then there may be some existing subgoals that must be removed
RemoveAllSubgoals();
// it is possible for the target to die while this goal is active so we
// must test to make sure the agent always has an active target
if (Agent.TargetingSystem.IsTargetPresent)
{
// grab a local copy of the last recorded position (LRP) of the target
var lrp = Agent.TargetingSystem.LastRecordedPosition;
// if the agent has reached the LRP and it still hasn't found the target
// it starts to search by using the explore goal to move to random
// map locations
if (Epsilon.IsZero(lrp) || Agent.IsAtPosition(lrp))
{
AddSubgoal(new Explore(Agent));
}
// else move to the LRP
else
{
AddSubgoal(new MoveToPosition(Agent, lrp));
}
}
// if there is no active target then this goal can be removed from the queue
else
{
Status = StatusTypes.Completed;
}
}