Coroutine over Loop

Hi.

I would like to prevent some code to be executed until a certain condition is met. Basically, what I want to do is something as simple as

Code (csharp):

1. private bool isReady = false;
2.  
3. void Start()
4. {
5.     while (!someCondition)
6.     {
7.         // re-check my condition
8.     }
9.     isReady = true;
10. }
11.  
12. void Update()
13. {
14.     if (isReady)
15.     {
16.         // do my stuff
17.     }
18. }

Is there a nicer/more efficient way to do this, using a coroutine ?
I tried converting my "void Start" into a "IEnumerator Start" and using

Code (csharp):

1. yield return someCondition;

but didn't get much success so far.
Thanks for the help.

 

If you're checking every frame anyway, there's not much point having both a coroutine and Update; you can just do it in Update. However, wouldn't it be better to send a message when the condition is true and make a function run at that time, instead of constantly checking?

--Eric

 

Thanks Eric.
I'm still struggling a bit to understand exactly when and where to use coroutines. I guess in this case, it wasn't a good idea to use it.
The SendMessage function wouldn't be much useful in my case, because the stuff I want to do when my condition is met is to be executed every frame. So I guess my Update check is the best solution to use.

 

Generally co-routines make sense when you've got a task to perform which will take too long to perform in a single frame, without breaking your framerate badly. IE:

Code (csharp):

1. IEnumerator PerformTask (SomeSort ofParameter)
2. {
3.     while (!done  stillRelevant)
4.     {
5.         // do one frames work //
6.         yield return null;
7.     }
8.  
9.     if (done)
10.     {
11.         HandOver (result);
12.     }
13. }

WaitForSecond and friends can be used if you don't need to update the work each frame or if you would like your coroutine to be re-called at a specific point in the call order.

 

That or you want to control parameters over-time but it doesn't make sense to put your code in Update

I sometimes do [pseudo-code]

IEnumerator GoGetObject(GameObject object) {

while(distanceToObject > 0) {
transform.position = Vector3.Lerp(...)
distanceToObject = Vector3.Distance(...)
yield return 0;
}
grabObject(object);

}