AddBox()

To add boxes to a plane, we need to add a method to do so. This method is called AddBox(). Let's set this up by going through the following steps:

1. In the WhackABox project, open the Game.cs file.
2. Add the random property to the class (preferably at the top, but anywhere in the class will work).
3. Add the AddBox() method anywhere in the class, as shown in the following code block:

private static Random random = new Random(); 

private void AddBox(PlaneNode planeNode)
{
    var subPlaneNode = planeNode.GetChild("subplane");
 
    var boxNode = planeNode.CreateChild("Box");
    boxNode.SetScale(0.1f);
 
    var x = planeNode.ExtentX * (float)(random.NextDouble() -
      0.5f);
    var z = planeNode.ExtentZ * (float)(random.NextDouble() - 
      0.5f);
 
    boxNode.Position = new Vector3(x, 0.1f, z) +  
    subPlaneNode.Position;
 
    var box = boxNode.CreateComponent<Box>();
    box.Color = Color.Blue;
} 

The static random object that we create will be used...