How to abort current task when see the target while patroling?

[kaluluosi]

I design my first limbo behaviortree .

I chose to attach an Area2D to the monster as its sight, and then continuously bind the collided Node2D to the blackboard's target variable.

Then, use the CheckVar node to determine if there is a target to enter the attack or patrol branch.

Overall, it works pretty well, but there's one issue...

That is, when the monster in the Patrol branch is moving, if the target enters the field of view, the monster will ignore the target because the movement action hasn't finished yet.

So, what's the correct way to make the monster immediately stop the movement action and end the patrol branch when it detects a target during patrol movement?

Should I implement a Decorator to continuously monitor whether the target in the blackboard is assigned a value? If it is assigned, abort the patrol subtask? It seems that BTTask has abort function.

[limbonaut]

You can take a look at DynamicSequence:

DynamicSequence
-- Condition
-- Action

As long as the Condition returns success, the Action will continue to perform until it succeeds. The difference between the normal sequence and the dynamic is that the dynamic one reevaluates all its children on each tick before it resumes the Action.

Similarly, there is also a dynamic selector.