用Array.shuffle生成随机值

Godot Engine 3.2Alpha2

Godot内置了很多游戏开发常用的功能函数

数组对象内置了一个shuffle()函数，顾名思义就是打乱数组的顺序，常用于构造枚举类型以及其它离散有限数据的随机，非常好用

Shuffles the array such that the items will have a random order. This method uses the global random number generator common to methods such as @GDScript.randi. Call @GDScript.randomize to ensure that a new seed will be used each time if you want non-reproducible shuffling.

范例

extends Node

enum{
	IDLE,
	MOVE,
	SHOOT,
	HURT,
	DIE
}

var state = MOVE

func _process(delta):
	match state:
		IDLE:
			pass
		MOVE:
			pass
		SHOOT:
			pass
		HURT:
			pass
		DIE:
			pass
		_:
			state = choose([IDLE,MOVE,SHOOT,HURT,DIE])

func choose(array):
	randomize()
	array.shuffle()
	return array.front()

shuffle()可以和front()配合使用，注意：由于每次打乱顺序都是基于全局的随机算子，因此如果要确保每次结果不重复，需要先调用一下全局函数randomize()