Pause execution of behavior tree

[jahshuwuhParticipant]

I have a model with a behavior tree attached to it that’s a basic waypointpatrol. I need for the model to not begin that behavior tree until a certain event occurs. How would I go about stopping this behavior tree from executing on start up, and then starting it when my particular event occurs?

[primeKeymaster]

A simple approach would be to do this:

SELECTOR:
— EVALUATE EXPRESSION (event hasn’t happened)
— SEQUENCER
— — EVERYTHING ELSE

[jahshuwuhParticipant]

I’m not sure I can specify this particular event within the behavior tree. It’s an augmented reality shooter game and I need it to wait until I have the tracking image in view before starting the behavior tree. So I have a C# file that’s overriding a method that checks if a tracking image has been seen by the camera. This is where I would need to place some logic to start up the behavior tree, if that’s possible.

[primeKeymaster]

Other options then:

1) Just set your AI to inactive until it is ready to go.

AIRig tRig = gameObject.GetComponentInChildren<AIRig>();
tRig.AI.IsActive = true;

2) Stick with the Selector, but use your script to indicate whether you are ready to go.

AIRig tRig = gameObject.GetComponentInChildren<AIRig>();
tRig.AI.WorkingMemory.SetItem<bool>("ready", true);

3) Activate/Deactivate the entire character game object using Unity methods.

[jahshuwuhParticipant]

Thanks for the reply. With option #1 using my own script I’m getting the error: “Cannot implicitly convert type ‘RAIN.Core.AIRig[]’ to ‘RAIN.Core.AIRig'” on this line:

AIRig tRig = gameObject.GetComponentInChildren<AIRig>();

So I need to store the return from gameObject.GetComponentInChildren<AIRig>() in an array then?

[primeKeymaster]

Did you accidentally use GetComponentsInChildren?

[jahshuwuhParticipant]

Good call, didn’t notice that.

[jahshuwuhParticipant]

Should I then be setting the AI inactive in the Start() method and then can I set it back to active in the Update() method once a condition is reached? So far I can get it inactive with this method, but no luck in turning it back on.

[primeKeymaster]

Yes, you should be able to simply toggle IsActive true or false to get what you want. IsActive shouldn’t impact initialization of the AI, just the running behavior.

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