Accessing variables & functions from C#

[rixter757Participant]

Hi Nuv,

I read the answer to this somewhere, but I can’t find it.

I need to read/write to/from variables from C# that were created on the Blackboard.

Also, is there a way to call a BT from C#? I have a button asset, and it needs to call a script. I need it to start a BT instead, so I could do both by writing a simple script to call the BT to start.

Thanks,

Rix

[GavalakisKeymaster]

Hey,

Yes. you can use the Blackboard API to get/set variables through code. Here is a simple example of getting and setting a float variable:

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using UnityEngine; using NodeCanvas.Framework;   public class SomeExample : MonoBehaviour {   public Blackboard blackboard;   void Start(){ var someFloat = blackboard.GetValue<float>("myFloat"); blackboard.SetValue("myFloat", someFloat + 10); } }

Regarding calling a BT from C#, if you mean starting/stopping a BT, yes of course 🙂 You can use the GraphOwner API for that. Here is an example:

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using UnityEngine; using NodeCanvas.BehaviourTrees;   public class SomeExample : MonoBehaviour {   public BehaviourTreeOwner owner;   void Update(){ if (Input.GetKeyDown(KeyCode.Alpha1)){ owner.StartBehaviour(); }   if (Input.GetKeyDown(KeyCode.Alpha2)){ owner.StopBehaviour(); } } }

Let me know if this is what your asked or I misunderstood the questions 🙂

Thanks.

[rixter757Participant]

First class, thanks very much for this.

Rix

[GavalakisKeymaster]

You are very welcome 🙂

[rixter757Participant]

I finally got around to writing my review, prompted by the person who left a 3 star review. I was insulted for you 😉

[GavalakisKeymaster]

Thank you very much Richard! I really appreciate it 🙂

[Author]

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