It gives me this error:

david8184

Attempt to call function 'get' in base 'null instance' on a null instance. func _ready(): stateMachine = $AnimTree.get("parameters/playback")

FopenP

In your .tscn file there's no AnimTree or AnimationTree node. If it's on the parent node, you need to do in this way:

stateMachine = $"../AnimTree"["parameters/StateMachine/playback"]

david8184

Still with the error.

FopenP

The node is not there. You need to make show the entire node hierarchy in order to specify the correct location. Sometimes you need to specify a granparent, like $"../../AnimTree"["parameters/StateMachine/playback"]. And "StateMachine" is the name you given to the state machine ("StateMachine" by default).

david8184

I have another error. onready var joystick = get_tree().get_nodes_in_group("joystick")[0].get_parent().get_node("joystick/boton")

FopenP

get_nodes_in_group("joystick") has returned an empty array. So there is no "joystick", reachable in that stage (the _ready() function).

I seen the StateMachine inside the kinematicbody. In this case you reach it with:

stateMachine = $StateMachine["parameters/StateMachine/playback"]

david8184

But in row 7 it gives me this error: Invalid get index '0' (on base: 'Array').

FopenP

The _ready() function haven't found a node in the "joystick" group. You have no "joystick" node inside KinematicBody2D. This is normal. You need to start another scene that contains a node in the "joystick" group. That scene won't never start if no "joystick" is present.

david8184

Other errror: Invalid get index 'parameters/StateMachine/playback' (on base: 'null instance').

FopenP

It's the same error? The KinematicBody2D should be in the CanvasLayer hierarchy. You should use a parent scene that merges everything.

david8184

How can I put the KinematicBody2D in the CanvasLayer hierarchy?

david8184

FopenP

You save the scene and instance it. It's the button next to the + (for adding nodes).

david8184

So?

FopenP

Yes (more or less). You need to think your project as a tree.

- Main scene
  - Canvas Layer (instanced)
  - KinematicBody2D (instanced)

And you start "main scene".

What's inside AnimationTree? ~~You need to have a state machine called "StateMachine".~~ Never mind, this is valid for 3D. You can do

    stateMachine = $StateMachine["parameters/playback"]

david8184

So?

FopenP

I need to see how this AnimationTree (called "StateMachine") has been done. Have you added... Tree Root: AnimationNodeStateMachine ? Is there any warning?

david8184

How can I added?

FopenP

Yes, I need to see the inspector and whether a warning is set. If you intended the "Tree root", is in the inspector!

david8184

So?