Godot调用move_and_slide()报错：参数过多，预期最多0个却收到1个

你的代码报错核心是Godot版本API差异：你用的是Godot 4，但写法沿用了Godot 3的move_and_slide()调用逻辑，两者的实现规则不一样：

• Godot 3中move_and_slide()接受速度向量作为参数
• Godot 4中该方法不再接收任何参数，必须先给节点的velocity属性赋值，再调用无参的move_and_slide()

修正后的完整代码：

extends CharacterBody2D

# Movement speed
var speed = 100 
var player_position
var target_position
# Get a reference to the player. 
@onready var player = get_parent().get_node("Player")
 
func _physics_process(delta):
    # Set player_position to the position of the player node
    player_position = player.position
    # Calculate the direction to player
    target_position = (player_position - position).normalized()
 
    if position.distance_to(player_position) > 1:
        velocity = target_position * speed
        move_and_slide()
        look_at(player_position)

补充两点注意事项：

• target_position是归一化后的方向向量，乘以speed得到的是每秒移动的速度值，直接赋值给velocity即可
• move_and_slide()会自动处理物理帧的时间补偿和碰撞响应，无需手动将速度乘以delta

内容的提问来源于stack exchange，提问作者Bad Dev