Day 28. 解掉bug了

啊..败给旅游燃烧殆尽症候群了，昨天晚上不小心睡着，忘记设闹钟，再醒来就已经过12点了QwQ

解bug

UnassignedReferenceException: The variable panel of LineRendererSettings has not been assigned.
You probably need to assign the panel variable of the LineRendererSettings script in the inspector.
UnityEngine.GameObject.GetComponent[T] () (at /Users/bokken/buildslave/unity/build/Runtime/Export/Scripting/GameObject.bindings.cs:28)
LineRendererSettings.Start () (at Assets/LineRendererSettings.cs:30)

他说我没有把panel变数赋值给LineRendererSettings.cs

这个是因为我在Day 25. VR菜单3，对这句话只理解了一半：

Left-click and drag the panel from your Hierarchy window into the slot on the LineRendererSettings script on your Capsule (Figure 21).

　
中文的傻瓜理解应该是：

1. Add LineRendererSettings script on your Capsule完後
2. 才是drag the panel from your Hierarchy window into the slot on the LineRendererSettings script on your Capsule

　
　
　
恩！这样bug就没了

Q:为什麽属於UI的canvas要放在3D object的cube下？

参考：
https://ithelp.ithome.com.tw/articles/10280153
https://learn.unity.com/tutorial/creating-a-vr-menu-2019-2#6036dc27edbc2a50f848a701