Coroutine starting block skipped... Any thoughts?

[Vizionz]

Hi All -
I’m encountering a situation where my coroutine start block is called, but is never entered. While debugging, I discovered that after stepping-in from a breakpoint set at MyCoroutine(), it steps into the { but then exits out to an FixedUpdate() in another class. It never returns to the MyCoroutine() function.
Any thoughts?

	void Start()
	{
		Debug.Log("START CALLED");
		StartCoroutine("MyCoroutine");
	}
	
	void Awake()
	{
		Debug.Log("AWAKE CALLED");
		CreatePins();
	}
	
	IEnumerable MyCoroutine()
	{ // Step-In Stops Here...
		Debug.Log("MyCoroutine STARTED");
		while (true)
		{
			_state = "StateNewGame";
			Debug.Log ("State "+_state);
			yield return StartCoroutine(_state);
		}
	}

[Jix]

This is not the way to use coroutines, what you should do is this

IEnumerable MyCoroutine()
    { // Step-In Stops Here...
       Debug.Log("MyCoroutine STARTED");
       while (true)
       {
         Debug.Log ("State "+_state);
         yield return null;
       }
    }

yield return null; will make your script return to this line every frame and jumps back to the begining of the while loop to check if(true) (which it is true), then it will run the code up to (yield return null)

this link will help you understand coroutines

link text

[Vizionz]

Thanks @Jix and @Huacanacha !

I was able to trouble shoot the problem… There were 2 fixes I made to get the FSM working correctly.

1. Syntax Problem - I was using IENumerable instead of `IENumerator’.

2. Restructured my FSM, granted, it seems like a hack fix making a coroutine manage another coroutine that is executed and terminated based on the state that is called. (See Below)

   // 1. Created an enum to hold all states available.
   enum State {	StateNewGame,
   				StateBall1,
   				StateBall2,
   				StateBall3,
   				StateRolling,
   				StateRolledPast,
   				StateGutterBall,
   				StateNextBall,
   				StateSpare,
   				StateStrike,
   				StateKnockedSomeDown,
   				StateRollOver,
   				StateGameOver			};
   
   public State _state;
   
   void Awake()
   {
   	_state = State.StateNewGame;	// 2. Assign the first state.
   	StartCoroutine(MyCoroutine());	// 3. Start the initial Coroutine to start.
   	CreatePins();
   }
   
   void Start()
   {
   	Debug.Log("START CALLED");
   }
   
   IEnumerator MyCoroutine()
   {
   	while (true)
   	{
   		Debug.Log ("State "+_state.ToString());
   		yield return StartCoroutine(_state.ToString());	// 4. Initializes a new Coroutine for the state that is called.
   	}
   }
   

The FSM works now, but I’m in the process of debugging the error I get.

Error:
Coroutine ‘StateKnockedSomeDown’ couldn’t be started! UnityEngine.MonoBehaviour:StartCoroutine(String) c__Iterator0:MoveNext() (at Assets/[1] Scripts/bV_bowl.cs:64)