Base Type

base type

TreeNode (base class)

base class for all nodes

//When the instance of the behavior tree is generated, initialize this node
public abstract void Initialize();

//execute the node
public abstract State Execute();

//Receive the return value of its own child node
public virtual State ReceiveReturnFromChild (bool @return);

//pass the return value to its own parent node
public virtual void End(bool @return);

//stop the execution of this node
public virtual void Stop();

//List a node as the next node to execute
public void SetNextExecute (TreeNode child);

//Return all direct child nodes of this node
public List<UUID> GetAllChildrenUUIDs();

SetNextExecute(child) is a terminal handoff. Return its NONE_RETURN immediately; do not call it and then return another State from the same execution turn.

AI pause state

AI.IsPaused controls only automatic Unity Update, LateUpdate, and FixedUpdate forwarding. AI.Pause() and AI.Resume() preserve the behaviour-tree execution state and do not freeze physics, coroutines, or animation.

NodeProgress (parameters for ObjectCall nodes and ObjectAction nodes)

Used to control the execution state of a node. In ObjectAction and ObjectCall, if the specified method has this parameter, the method can control the tree through NodeProgress.

ComponentAction and ComponentCall are legacy nodes that migrate directly to FunctionAction and FunctionCall when their methods are eligible. ObjectAction and ObjectCall also retain editor upgrade paths to the Function nodes. These nodes remain available for compatibility; new behaviour trees should prefer FunctionAction/FunctionCall.

method

//End the node execution in Behaviour Tree
public void Complete(bool value);

//When the monoBehaviour is destroyed, end the execution of the node in the Behaviour Tree
public void CompleteWhenDestroyed(UnityEngine.Object obj, bool value = true);
public void CompleteWhenCanceled(CancellationToken token, bool value = true);
public void CompleteWhenCompleted(Task task, bool value = true, bool canceledValue = false);
public void CompleteWhenFalse(Func<bool> condition, bool value = true);

Example

//example: use ObjectCall to execute the Attack method in the script
public void Attack(NodeProgress progress){
    if (...){
        //Make the ObjectCall node return false
        progress.Complete(false);
    }
    //Make the ObjectCall node return true
    else progress.Complete(true);
}

Don't write two methods with the same name in the script, otherwise the AI will not be able to determine which method it is.

public void MethodName (NodeProgress node);
public bool MethodName ();//ObjectCall only
public void MethodName ();
//It is illegal when the above methods appear at the same time