godot.bk5:how to change the scene

control：界面层，点击start进入map 

extends Control

@onready var start = $Button
# Called when the node enters the scene tree for the first time.
func _ready():
	start.connect("button_down", self._on_pressed_)
	pass # Replace with function body.
	
func _on_pressed_():
	get_tree().change_scene_to_file("res://map.tscn")


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	pass

 

map：二维的地图，npc发现玩家开始追逐，追逐成功进入attack地图，注意要放两个area2D检测，一个是检测是否追逐，一个是检测是否进入attack地图 （attack是一个横板单挑地图）

extends Node2D


# Called when the node enters the scene tree for the first time.
func _ready():
	pass # Replace with function body.


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	if Global.is_attack == true:
		print("move to attack...")
		get_tree().change_scene_to_file("res://attack.tscn")
	pass

 

NPC ：Globa的位置就是玩家实时更新的位置

extends CharacterBody2D
 
const SPEED = 8000.0
var is_atttack
@onready var timer = $Timer 
var dir = Vector2.RIGHT
var move = false
	
func _physics_process(delta):
	if is_atttack:
		velocity = (Global.player_pos - position).normalized() * SPEED * delta
		move_and_slide()
		return
	if timer.is_stopped():  
		return 
	
	if !timer:
		timer.set_wait_time(random_something([1, 0.5, 0]))  
		timer.start()
	
	if move:
		#dir = random_something([Vector2.RIGHT, Vector2.LEFT, Vector2.UP, Vector2.DOWN])
		velocity = dir * SPEED * delta
		move_and_slide()
 
func _on_area_2d_body_entered(body):
	if body.is_in_group("player"):  #没有这一行，开局就会和map碰撞，直接卡死
		is_atttack= true
	pass


func _on_area_2d_body_exited(body):
	is_atttack= false
	pass # Replace with function body.
	
func random_something(arr):  #获取一个随机数
	arr.shuffle()
	return arr.front()

func _on_timer_timeout():
	move = !move
	dir = random_something([Vector2.RIGHT, Vector2.LEFT, Vector2.UP, Vector2.DOWN])
	pass # Replace with function body.


func _on_attack_body_entered(body):
	if body.is_in_group("player"): #这一行至关重要，我没加，每次都是attcak
		Global.is_attack = true
	pass # Replace with function body.