State machine and crosshair

scritps/state_machine/machine.gd

@@ -0,0 +1,36 @@
+extends Node
+
+
+class_name StateMachine
+
+@export var current_state: State
+var states: Dictionary[StringName,State] = {}
+
+func _ready() -> void:
+	for child in get_children():
+		if child is State:
+			states[child.name] = child
+			child.transition.connect(on_transition_required)
+		else:
+			push_warning("Child of state machine is not state")
+
+func on_transition_required(to: StringName):
+	if states.has(to) == false:
+		push_warning("Incorrect state request: " + to)
+		return
+	
+	current_state.exit()
+	current_state = states[to]
+	current_state.enter()
+
+func _process(delta: float) -> void:
+	if current_state == null:
+		push_error("State is not set")
+		return
+	current_state.update(delta)
+
+func _physics_process(delta: float) -> void:
+	if current_state == null:
+		push_error("State is not set")
+		return
+	current_state.physics_update(delta)