extends Node3D
## 角色状态机
class_name StateMachine

## 默认状态
@export var current_state: StateBase

func  _ready() -> void:
	##StateMachine中的所有子节点
	for child in get_children():
		if child is StateBase:
			child.state_machine = self
	await get_parent().ready
	current_state.enter()

func _process(delta: float) -> void:
	current_state.process_update(delta)
	

## 修改状态 对每一种状态拆分编写
func  change_state(target_state_name: String) -> void:
	var target_state = get_node_or_null(target_state_name)
	if target_state == null:
		printerr("状态传入错误")
		return
	##退出当前状态
	current_state.exit()
	##切换为目标状态
	current_state = target_state
	current_state.enter()