Added Behavior Graph asset for Unity

AI/Assets/Scripts/UnityBehaviors/FindByRaycastAction.cs

@@ -0,0 +1,49 @@
+using System;
+using AI.FSM;
+using Unity.Behavior;
+using UnityEngine;
+using Action = Unity.Behavior.Action;
+using Unity.Properties;
+
+[Serializable, GeneratePropertyBag]
+[NodeDescription(name: "Find By Raycast", story: "Find [Target] by Raycast from [Agent]", category: "Action/Find", id: "4485803bf98219ce319c3000d6f8e6bf")]
+public partial class FindByRaycastAction : Action
+{
+    [SerializeReference] public BlackboardVariable<GameObject> Target;
+    [SerializeReference] public BlackboardVariable<GameObject> Agent;
+    [SerializeReference] public BlackboardVariable<float> MaxDistance = new(10.0f);
+
+    protected override Status OnStart()
+    {
+        // initialize action here
+        
+        // test for valid variables
+        if (Agent.Value == null) return Status.Failure;
+        
+        return Status.Running;
+    }
+
+    protected override Status OnUpdate()
+    {
+        Target.Value = null;
+        
+        RaycastHit hit;
+        if (!Physics.Raycast(Agent.Value.transform.position, Agent.Value.transform.forward, out hit,
+                MaxDistance))
+        {
+            return Status.Failure;
+        }
+            
+        PlayerController playerController = hit.collider.GetComponent<PlayerController>();
+        if (!playerController) return Status.Failure;
+        
+        Target.Value = playerController.gameObject;
+        return Status.Success;
+    }
+
+    protected override void OnEnd()
+    {
+        // deinitialize action here
+    }
+}
+

AI/Assets/Scripts/UnityBehaviors/FindByRaycastAction.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 91157a6cd972849c58afadf2f49c5d04

AI/Assets/Scripts/UnityBehaviors/GameObjectNullCondition.cs

@@ -0,0 +1,35 @@
+using System;
+using Unity.Behavior;
+using UnityEngine;
+
+[Serializable, Unity.Properties.GeneratePropertyBag]
+[Condition(name: "Target Null", story: "[Target] [is] null", category: "Conditions", id: "83ee136bdfeb6568a8a2fb0a340e6e69")]
+public partial class GameObjectNullCondition : Condition
+{
+    [SerializeReference] public BlackboardVariable<GameObject> Target;
+    [Comparison(comparisonType: ComparisonType.Boolean)]
+    [SerializeReference] public BlackboardVariable<ConditionOperator> Is;
+
+    public override bool IsTrue()
+    {
+        if (Is.Value == ConditionOperator.Equal)
+        {
+            return Target.Value == null;
+        }
+        else
+        {
+            return Target.Value != null;
+        }
+
+        return (Target.Value == null && Is.Value == ConditionOperator.Equal) ||
+               (Target.Value != null && Is.Value == ConditionOperator.NotEqual);
+    }
+
+    public override void OnStart()
+    {
+    }
+
+    public override void OnEnd()
+    {
+    }
+}

AI/Assets/Scripts/UnityBehaviors/GameObjectNullCondition.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 0c4c02578331346c792b21cbd5e227a4