Develop a Sprite and Platform Game - Unity 4 Game Development - page 13

Engage thrusters

To start building the level, first we need to add new tags and layers. So, let's get on with it:

1. Let's go to Edit | Project Settings | Tags and Layers to bring up the Tags and
Layers inspector view and set it as follows:

Tags

Size

5

Element 0 Ground

Element 1

RestartButton

Element 2

Key

Element 3 Door

Layers

User Layer 8 Player

User Layer 9 Ground

Tags make it easy to find the object, we need GameOb-
ject.FindWithTag("TagName") or gameObject.tag . More details on
tags can be found at http://docs.unity3d.com/Documentation/Components/
Tags.html .

Note

Layers are used to determine which object will be rendered or used for raycasting.
Sometimes, we can use layers to separate the objects to be rendered. For example,
we could have two cameras and set the first camera to render only the foreground
objects and then another camera to render only the background object (such as, UI,
or minimap). More details on layers can be found at http://docs.unity3d.com/Docu-
mentation/Components/Layers.html .