Godot基础

extends Sprite2D

var jishiqi:float  = 5;

#节点添加到节点树的时候调用
func _enter_tree() -> void:
	
	#先调用父节点，再调用子节点
	print("enterTree")

# Called when the node enters the scene tree for the first time.
# 节点全部加载好后调用，所以比上面个方法晚一点，是冒泡调用
func _ready() -> void:
	
	#先调用子节点，再调用父节点
	print("ready")

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	
	#每帧调用
	jishiqi -= delta
	if(jishiqi<=0):
		queue_free();

func _physics_process(delta: float) -> void:
	
	#每次物理系统计算，会调用一次
	pass

#节点离开节点树时调用
func _exit_tree() -> void:
	print("exitTree")

extends Node2D


# Called whenv the node enters the scene tree for the first time.
func _ready() -> void:
	
	#鼠标设置，显示、隐藏在游戏窗口
	#Input.mouse_mode = Input.MouseMode.MOUSE_MODE_CONFINED
	pass
	
# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	
	#TODO，这有bug
	#按键事件
	if Input.is_key_pressed(Key.KEY_B):
		print("按下了B键")
	
	if Input.is_action_just_pressed("jump"):
		print("按下了跳跃")
	elif Input.is_action_pressed("jump"):
		print("跳跃中")
	elif Input.is_action_just_released("jump"):
		print("松开跳跃")
	
	#TODO获取按键向量
	float s = Input.GetActionStrength("jump")
		
func _input(event: InputEvent) -> void:
	
	#是键盘事件，并且按下了
	if event is InputEventKey:
		
		#按下的V键，参阅 @GlobalScope_Key 以获取键码常量列表。
		if event.keycode == KEY_V:
			
			#判断当前是否是持续按压
			if event.is_echo():
				print("持续按下了V键")

			elif event.is_pressed():
				print("V按下了瞬间")
					
			elif event.is_released():
				print("抬起V")		
				
	#鼠标事件
	elif event is InputEventMouseButton:
		
		if event.is_pressed():
			print(event.position)
			print(event.button_mask)
			

extends Node2D

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


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	if Input.is_action_just_pressed("jump"):
		
		#还有个get_node()方法没演示
		var childNode = get_tree().root.find_child("childNode",true,false)
		
		#childNode.queue_free(); 
		
		var node2D = Node2D.new()
		node2D.name = "new"
		childNode.add_child(node2D)
		

extends Node

@export var newScene:PackedScene

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

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	if Input.is_action_just_pressed("left"):
		
		#跳转场景1
		#get_tree().change_scene_to_file("res://scen_2.tscn")
		
		#跳转场景2
		#get_tree().change_scene_to_packed(newScene)
		
		#跳转场景3
		get_tree().current_scene.add_child(newScene.instantiate())

extends Sprite2D

@onready var sprite_2d: Sprite2D = $"."

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	
	sprite_2d.visible = true
	sprite_2d.z_index = 10
	sprite_2d.z_as_relative =false

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	
	#获取鼠标位置
	var pos = get_global_mouse_position()
	
	#看向某个点
	look_at(pos)
	print(pos)

extends Sprite2D


# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	
	#同样也可以用导出一个属性的方式，加载图片
	texture = load("res://icon.svg")
	centered = false
# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	pass

extends Sprite2D


# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	var enemys = get_tree().get_nodes_in_group("敌人")
	
	#TODO,没生效，作用1，分组管理
	if Input.is_action_just_pressed("left"):
		enemys.any(queue_free)
	
	#TODO,没生效,作用2，分组消息
	if Input.is_action_just_pressed("right"):
		get_tree().call_group("敌人","test")
	
# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	pass