Initial commit

scripts/key.gd

@@ -0,0 +1,30 @@
+extends Area2D
+
+var is_following = false
+var target = null
+var floating = true
+var float_amplitude: float = 5.0   # 浮动幅度（像素）
+var float_speed: float = 3.0
+var time = 0
+
+func _ready():
+	body_entered.connect(_on_body_entered)
+	add_to_group("key")	
+
+func _process(delta):
+	time += delta
+	if floating:
+		position.y += sin(time * float_speed) * float_amplitude * delta
+		
+
+func _on_body_entered(body):
+	if body.is_in_group("player") and not is_following:
+		body.add_to_group("has_key")
+		is_following = true
+		target = body
+		floating = false
+		set_deferred("monitoring", false)
+			
+func _physics_process(delta: float) -> void:
+	if is_following == true and target:
+		global_position = global_position.lerp(target.global_position,0.2)