limboai/doc/source/getting-started/accessing-nodes.rst

.. _accessing_nodes:

Accessing nodes in the scene tree
=================================

There are several ways to access nodes in the agent's scene tree.

    **🛈 Note:** Agent is the owner of :ref:`BTPlayer<class_BTPlayer>` node.


With ``BBNode`` property
------------------------

.. code:: gdscript

   @export var cast_param: BBNode

   func _tick(delta) -> Status:
       var node: ShapeCast3D = cast_param.get_value(agent, blackboard)


With ``NodePath`` property
--------------------------

.. code:: gdscript

   @export var cast_path: NodePath

   func _tick(delta) -> Status:
       var node: ShapeCast3D = agent.get_node(cast_path)


Using blackboard plan
---------------------

You can :ref:`create a blackboard variable<editing_plan>` in the editor with the type ``NodePath``
and point it to the proper node in the :ref:`BTPlayer<class_BTPlayer>` blackboard plan.

.. code:: gdscript

   extends BTCondition

   @export var shape_var: String = "shape_cast"

   func _tick(delta) -> Status:
       var shape_cast: ShapeCast3D = blackboard.get_var(shape_var)

The property :ref:`BTPlayer.prefetch_nodepath_vars<class_BTPlayer_property_prefetch_nodepath_vars>` should be set to ``true``.