isKinematic toggle not working

I have what is probably any easy problem I can't understand. Basically I have a cube (with a rigidbody attached) suspended in the air that starts out with isKinematic = true. When the user presses the space button, I toggle isKinematic to false, and the cube should then fall to the ground. I can tell the toggle is working by looking at the property in the inspector, but for whatever reason the cube still stays suspended. Here's the code:

Code (csharp):

1. var rigidOn:boolean = false;
2.  
3.  
4. function FixedUpdate () {
5.     if(Input.GetKeyDown("space")) {
6.         rigidOn = true;
7.     }
8.  
9.     if(rigidOn == true)  {
10.         rigidbody.isKinematic = false;
11.     } else {
12.         rigidbody.isKinematic = true;
13.     }
14.    
15. }

Why doesn't the cube fall? I know if I add the line rigidbody.useGravity = true below the rigidbody.isKinematic = true line, it does work. However, useGravity is always true from the beginning, I don't understand why I have to explicitly call that.

Thanks!

 

Because it's asleep; you have to wake it up.

--Eric

 

Thanks Eric. Is setting the useGravity property to true the best way to do that, or is there some other recommended way to wake it up?

 

rigidbody.WakeUp()

 

Perfect. thanks.