Time for action – adding GameObjects and a button to the Scene

Add a Plane GameObject and a Cube GameObject to the Scene panel. Add a Rigidbody Component to the Cube GameObject so it will fall to the Plane GameObject. Also add a Directional Light to the Scene panel if there isn't one already. Then we'll add a GUI button to switch to the PlayState object. To do so, perform the following steps:

1. In the menu, navigate to GameObject | Create Other | Plane.

2. In the Inspector panel, make sure the Position is 0,0,0 for X,Y and Z.

3. In the menu, navigate to GameObject | Create Other | Cube.

4. Set the values in the Inspector panel as shown in the next screenshot.

5. Select Cube in the Hierarchy panel.

6. In the menu, navigate to Component | Physics | Rigidbody.

7. In the menu, navigate to GameObject | Create Other | Directional Light if needed.

   

8. Add the following code to the code block of the ShowIt() method of BeginState:

     if (GUI.Button(new Rect(10, 10, 150, 100), "Press to Play"))
       {
         manager.SwitchState (new...