- Download the .zip file and extract the addons folder to your root project folder
res:// - Enable the addon by ticking the enable checkbox at Project -> Project Settings -> addons
This is a simple barebones FSM project for Godot 4.4, it contains a FSM brain and State class so you can focus on building your states and logic.
The state machine is not limited to player nor enemy logic, it's parent agnostic, meaning that you have to define manually the component that its gonna alter, here a quick example of a Idle state for a CharacterBody3D (player):
extends State
class_name player_idle
@export var player_character: CharacterBody3D
var gravity: float = ProjectSettings.get_setting("physics/3d/default_gravity")
func physics_process(_delta: float) -> void:
if !player_character.is_on_floor():
change_state.emit(self, "player_falling")
pass
if Input.is_action_just_pressed("backward") or Input.is_action_just_pressed("forward") or Input.is_action_just_pressed("left") or Input.is_action_just_pressed("right"):
change_state.emit(self, "player_moving")
player_character.velocity.x = 0
player_character.velocity.z = 0
player_character.move_and_slide()
pass
To change between states is simple as calling the change_state signal, it takes two arguments, the state emmiting the signal and the desired state:
change_state.emit(self, "your_new_state")Keep in mind that your_new_state is just the state name in the scene tree
if you want to use script templates you'd have to download the script_templates folder in this repo and place is in your res://