How make an FSM/Behaviour tree run at FixedUpdate?

[Anonymous]

How make an FSM/Behaviour tree run at FixedUpdate, my game involves physics.

[Gavalakis]

Hello,

Are you referring to making custom scripted actions run in FixedUpdate, or updating the whole graph in FixedUpdate?
Generally speaking is not really advisable to update everything in FixedUpdate, but rather only physics related things that specifically have to do with rigidbody.

Taken from the Unity docs for your convenience, states that:
FixedUpdate should be used instead of Update when dealing with Rigidbody. For example when adding a force to a rigidbody, you have to apply the force every fixed frame inside FixedUpdate instead of every frame inside Update.

Please let me know what is the case.
Thanks!

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[Anonymous]

Making custom scripted actions run in FixedUpdate.
For example in the FSM Super Action, has only Update, what are my options if i want to run a function in the FSM or Behaviour tree at FixedUpdate?

[Gavalakis]

Hey,

Here is an example of the way to use FixedUpdate in a custom ActionTask:

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using UnityEngine; using NodeCanvas.Framework; using ParadoxNotion.Services;   namespace NodeCanvas.Tasks.Actions{   public class FixedUpdateActionTask : ActionTask {   protected override void OnExecute(){ MonoManager.current.onFixedUpdate += OnFixedUpdate; }   void OnFixedUpdate(){ Debug.Log("I'm called in FixedUpdate"); EndAction(); }   protected override void OnStop(){ MonoManager.current.onFixedUpdate -= OnFixedUpdate; } } }

Let me know if that works for you.
Thanks!

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[Anonymous]

That is exactly what i need.
Would be nice something like this in the documentation page in case of someone has the same doubt.
Thank you.

[Gavalakis]

Great. Glad this works for you.
I’ve added this info in the documentation now 🙂

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