Godot4开发2D游戏，GDScript控制人物移动

Godot4开发2D游戏自学手册，第五节代码，用GDScript控制人物移动。extends CharacterBody2D enum { WALK, SWORD } var state = WALK const SPEED = 300.0 func _physics_process(delta): match state: WALK: walk_state() SWORD: sword_state() move_and_slide() func walk_state(): var direction = Vector2.ZERO direction.x = Input.get_axis("left", "right") direction.y = Input.get_axis("up", "down") if direction: velocity = direction * SPEED else: velocity= Vector2.ZERO func sword_state(): pass