Initial Commit

lib/state_machine/state.gd

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+extends Node
+class_name State
+
+signal transitioned(state: State, new_state_name: String)
+
+func _enter() -> void:
+	pass
+
+func _exit() -> void:
+	pass
+
+func _update(_delta: float) -> void:
+	pass
+
+func _physics_update(_delta: float) -> void:
+	pass

lib/state_machine/state.gd.uid

@@ -0,0 +1 @@
+uid://cb1uc3nlv2mgj

lib/state_machine/state_machine.gd

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+extends Node
+class_name StateMachine
+
+@export var initial_state: State
+
+signal state_changed(new_state: State)
+
+var current_state: State
+var states: Dictionary[String, State] = {}
+
+func _ready() -> void:
+	for child in get_children():
+		if child is State:
+			states[child.name.to_lower()] = child
+			child.transitioned.connect(_handle_child_transition)
+	
+	if initial_state:
+		initial_state._enter()
+		current_state = initial_state
+
+func _process(delta) -> void:
+	if current_state:
+		current_state._update(delta)
+
+func _physics_process(delta: float) -> void:
+	if current_state:
+		current_state._physics_update(delta)
+
+func _handle_child_transition(state: State, new_state_name: String) -> void:
+	if state != current_state:
+		return
+	
+	var new_state: State = states.get(new_state_name.to_lower(), null)
+	
+	if not new_state:
+		return
+	
+	if current_state:
+		current_state._exit()
+	
+	new_state._enter()
+	
+	current_state = new_state
+	state_changed.emit(new_state)

lib/state_machine/state_machine.gd.uid

@@ -0,0 +1 @@
+uid://c16ty2yx4qkvu