Class AIBehaviorTree

Namespace

FishMMO.Shared

Assembly

FishMMO.Shared.dll

Root container for a behavior tree. Assign to BehaviorTree to give an NPC high-level decision-making above the state machine.

The tree is evaluated once per AI tick (governed by AI LOD). If the root node returns Success, the tree produced a state transition and the current state's UpdateState is skipped for that tick. If it returns Failure, the current state continues normally.

Example tree:

AIBehaviorTree (root = Selector)
  ├─ Sequence: [Condition: IsDead] → [StateTransition: DeadState]
  ├─ Sequence: [Condition: HP ≤ 30%] → [StateTransition: RetreatState]
  ├─ Sequence: [Condition: EnemyNearby] → [StateTransition: AttackState]
  └─ StateTransition: WanderState

[CreateAssetMenu(fileName = "New AI Behavior Tree", menuName = "FishMMO/Character/NPC/AI/Behavior Tree/Behavior Tree")]
public class AIBehaviorTree : ScriptableObject

Inheritance

object

Object

ScriptableObject

AIBehaviorTree

Inherited Members

ScriptableObject.SetDirty()

ScriptableObject.CreateInstance(string)

ScriptableObject.CreateInstance(Type)

ScriptableObject.CreateInstance<T>()

Object.GetEntityId()

Object.GetInstanceID()

Object.GetHashCode()

Object.Equals(object)

Object.InstantiateAsync<T>(T)

Object.InstantiateAsync<T>(T, Transform)

Object.InstantiateAsync<T>(T, Vector3, Quaternion)

Object.InstantiateAsync<T>(T, Transform, Vector3, Quaternion)

Object.InstantiateAsync<T>(T, int)

Object.InstantiateAsync<T>(T, int, Transform)

Object.InstantiateAsync<T>(T, int, Vector3, Quaternion)

Object.InstantiateAsync<T>(T, int, ReadOnlySpan<Vector3>, ReadOnlySpan<Quaternion>)

Object.InstantiateAsync<T>(T, int, Transform, Vector3, Quaternion)

Object.InstantiateAsync<T>(T, int, Transform, Vector3, Quaternion, CancellationToken)

Object.InstantiateAsync<T>(T, int, Transform, ReadOnlySpan<Vector3>, ReadOnlySpan<Quaternion>)

Object.InstantiateAsync<T>(T, int, Transform, ReadOnlySpan<Vector3>, ReadOnlySpan<Quaternion>, CancellationToken)

Object.InstantiateAsync<T>(T, InstantiateParameters, CancellationToken)

Object.InstantiateAsync<T>(T, int, InstantiateParameters, CancellationToken)

Object.InstantiateAsync<T>(T, Vector3, Quaternion, InstantiateParameters, CancellationToken)

Object.InstantiateAsync<T>(T, int, Vector3, Quaternion, InstantiateParameters, CancellationToken)

Object.InstantiateAsync<T>(T, int, ReadOnlySpan<Vector3>, ReadOnlySpan<Quaternion>, InstantiateParameters, CancellationToken)

Object.Instantiate(Object, Vector3, Quaternion)

Object.Instantiate(Object, Vector3, Quaternion, Transform)

Object.Instantiate(Object)

Object.Instantiate(Object, Scene)

Object.Instantiate<T>(T, InstantiateParameters)

Object.Instantiate<T>(T, Vector3, Quaternion, InstantiateParameters)

Object.Instantiate(Object, Transform)

Object.Instantiate(Object, Transform, bool)

Object.Instantiate<T>(T)

Object.Instantiate<T>(T, Vector3, Quaternion)

Object.Instantiate<T>(T, Vector3, Quaternion, Transform)

Object.Instantiate<T>(T, Transform)

Object.Instantiate<T>(T, Transform, bool)

Object.Destroy(Object, float)

Object.Destroy(Object)

Object.DestroyImmediate(Object, bool)

Object.DestroyImmediate(Object)

Object.FindObjectsOfType(Type)

Object.FindObjectsOfType(Type, bool)

Object.FindObjectsByType(Type, FindObjectsSortMode)

Object.FindObjectsByType(Type, FindObjectsInactive, FindObjectsSortMode)

Object.FindObjectsByType(Type)

Object.FindObjectsByType(Type, FindObjectsInactive)

Object.DontDestroyOnLoad(Object)

Object.DestroyObject(Object, float)

Object.DestroyObject(Object)

Object.FindSceneObjectsOfType(Type)

Object.FindObjectsOfTypeIncludingAssets(Type)

Object.FindObjectsOfType<T>()

Object.FindObjectsByType<T>(FindObjectsSortMode)

Object.FindObjectsOfType<T>(bool)

Object.FindObjectsByType<T>(FindObjectsInactive, FindObjectsSortMode)

Object.FindObjectOfType<T>()

Object.FindObjectOfType<T>(bool)

Object.FindFirstObjectByType<T>()

Object.FindAnyObjectByType<T>()

Object.FindFirstObjectByType<T>(FindObjectsInactive)

Object.FindAnyObjectByType<T>(FindObjectsInactive)

Object.FindObjectsByType<T>()

Object.FindObjectsByType<T>(FindObjectsInactive)

Object.FindObjectsOfTypeAll(Type)

Object.FindObjectOfType(Type)

Object.FindFirstObjectByType(Type)

Object.FindAnyObjectByType(Type)

Object.FindObjectOfType(Type, bool)

Object.FindFirstObjectByType(Type, FindObjectsInactive)

Object.FindAnyObjectByType(Type, FindObjectsInactive)

Object.ToString()

Object.name

Object.hideFlags

object.Equals(object, object)

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

Fields

Root

The root node of the behavior tree. Typically a AISelector or AISequence.

[Tooltip("Root node of the behavior tree. Typically a Selector.")]
public AIBehaviorNode Root

Field Value

AIBehaviorNode

TickRate

How often (in seconds) the tree is re-evaluated. Lower values make the NPC more responsive but cost more CPU. Defaults to 0.5 seconds.

[Tooltip("Seconds between behavior tree evaluations.")]
public float TickRate

Field Value

float

Methods

Evaluate(AIController)

Evaluates the tree starting from the root.

public AINodeResult Evaluate(AIController controller)

Parameters

controller AIController

The NPC's AI controller.

Returns

AINodeResult

The result of the root node evaluation.