Implemented state machine & added NPC ship template

scripts/State Machine/Kamikaze/WanderingState.gd

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+extends State
+
+@onready var ship = get_parent().get_parent()
+@onready var star_system = get_tree().current_scene
+
+@onready var update_timer = $UpdateDestination
+## Ship will strive to achieve this angle
+var destination_degrees: float = 0:
+	set(value):
+		if value > 180:
+			destination_degrees = value - 360
+		elif value < -180:
+			destination_degrees = 360 + value
+		else:
+			destination_degrees = value
+## Delta to destination_degrees
+var destination_difference: float = 15.0
+## available map bounds (use with absolute position)
+var available_bounds: Vector2
+
+func _ready():
+	available_bounds = Vector2(star_system.width / 2, star_system.height / 2)
+	randomize()
+
+func enter(_message):
+	update_timer.start()
+	update_destination()
+
+func process(_delta):
+	# checking if need to apply torque
+	var current_destination_difference = destination_degrees - ship.hull.global_rotation_degrees
+	var rotation_sign = sign(current_destination_difference)
+	if current_destination_difference < 0:
+		current_destination_difference = 180 - current_destination_difference
+	if current_destination_difference > 180:
+		current_destination_difference -= 180
+	if abs(current_destination_difference) > destination_difference:
+		ship.engine.rotation_axis = rotation_sign * (current_destination_difference / 180)
+	else:
+		ship.engine.rotation_axis = 0.0
+	# making ship always accelerate
+	ship.engine.acceleration_axis = 1.0
+	# if ship is out of star system bounds, set destination angle to center
+	if abs(ship.global_position.x) > available_bounds.x or abs(ship.global_position.y) > available_bounds.y:
+		destination_degrees = rad_to_deg(ship.global_position.angle_to_point(Vector2.ZERO))
+
+func exit():
+	update_timer.stop()
+
+## Set new random direction
+func update_destination():
+	destination_degrees += randi_range(-180, 180)

scripts/State Machine/state.gd

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+extends Node
+
+class_name State
+
+var tree : StateTree
+
+func enter(_message : Dictionary):
+	pass
+
+func exit():
+	pass
+
+func process(_delta):
+	pass
+
+func physics_process(_delta):
+	pass
+
+func input(_message : Dictionary):
+	pass

scripts/State Machine/tree.gd

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+extends Node
+
+class_name StateTree
+
+## Emitted when active state is transitioned
+signal transitioned(to_state)
+
+## Active state
+@export var state : State
+
+## Dictionary of all states
+var cached_states = {}
+
+func _ready():
+	for child in get_children():
+		child.tree = self
+		cached_states[child.name] = child
+	
+	state.enter({})
+
+## Make another state active. Optionally, properties can be provided with message
+func transit(to : String, message : Dictionary = {}):
+	
+	state.exit()
+	
+	state = cached_states[to]
+	state.enter(message)
+	
+	transitioned.emit(to)
+
+## Provides properties to active state
+func send_input(message : Dictionary = {}):
+	state.input(message)
+
+## Provides properties to all states
+func send_input_to_system(message : Dictionary = {}):
+	for state in cached_states.values():
+		state.input(message)
+
+## Returns state with provided name
+func get_state(state_name) -> State:
+	return cached_states[state_name]
+
+#region Перегруженные виртуальные функции гойды
+func _process(delta) -> void:
+	state.process(delta)
+
+func _physics_process(delta) -> void:
+	state.physics_process(delta)
+
+#endregion