教你实现漂浮文本效果

漂浮文本节点

创建控制脚本,实现漂浮效果，在初始创建给一个向上运动然后往下落的效果

extends Position2D

var text setget set_text,get_text

var velocity = Vector2.ZERO
var gravity = Vector2.ZERO
var mass = 100

func _process(delta):
    velocity += gravity * mass * delta
    position += velocity * delta

func set_text(txt):
    $Label.text = str(txt)

func get_text():
    return $Label.text

接下来我们需要为该节点实现缓慢消失的效果，使用Tween补间动画，控制Position2D节点的Visibility -> Modulate进行控制，并且在补间动画完成后将节点清除

extends Position2D

---
date: '2022-07-31'
tags: ['godot']
draft: false
---

# ....

func _ready():
    # 消失
    $Tween.interpolate_proerty(self, "modulate",
    Color(modulate.r, modulate.g, modulate,b, modulate.a),
    Color(modulate.r, modulate.g, modulate,b, 0),
    0.3, Tween.TRANS_LINEAR, Tween.EASE_OUT, 0.7
    )

    # 放大
    $Tween.interpolate_proerty(self, "scale",
    Vector2(0, 0),
    Vector2(1, 1),
    0.3, Tween.TRANS_LINEAR, Tween.EASE_OUT
    )

    # 缩小
    $Tween.interpolate_proerty(self, "scale",
    Vector2(1, 1),
    Vector2(0.4, 0.4),
    0.3, Tween.TRANS_LINEAR, Tween.EASE_OUT, 0.7
    )

    $Tween.start()

---
date: '2022-07-31'
tags: ['godot']
draft: false
---

# Tween所有动画完成信号
func _on_Tween_tween_all_completed():
    get_tree().queue_delete(self)

主场景

创建主场景，并且创建一个按钮，当点击后新建漂浮文本

extends Node2D

var float_text = preload("res://float.tscn")

func _on_Button_pressed():
    var ft = float_text.instance()
    ft.position = Vector2(200, 300)
    # 控制漂浮文本的数值
    ft.velocity = Vector2(rand_range(-50, 50), -130)
    ft.gravity = Vector2(0, 1.5)
    ft.mass(200)
    # 设置随机颜色
    ft.modulate = Color(rand_range(0.7, 1), rand_range(0.7, 1), rand_range(0.7, 1), 1)

    var num = randi()%10 - 5
    ft.text = num
    if num > 0:
        ft.text = "+" + ft.text

    add_child(ft)