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4
Question by niter412 · Dec 22, 2009 at 01:03 AM · iphone

How can I use StartCoroutine() in Update()?

Hi,

I've been trying to make a cooldown for one of the attack function in Update().

However: IEnumerator wait (float waitTime) { yield return new WaitForSeconds (waitTime); }

and void Update() { yield return StartCoroutine(wait(5.0f)); }

doesn't work. Thank you very much!

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Answer by Peter Alexander · Dec 22, 2009 at 01:36 AM

You don't return StartCoroutine, you just call it:

IEnumerator Attack(float cooldown) { /* Insert attack code here */ weaponCooled = false; yield return new WaitForSeconds(cooldown); weaponCooled = true; }

void Update() { if (Input.GetKeyDown(KeyCode.Space) && weaponCooled) { StartCoroutine(Attack(5.0f)); } }

bool weaponCooled = true;

Note that this does not block the Update method -- it will immediately head onto the subsequent code.

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avatar image niter412 · Dec 22, 2009 at 03:15 AM 0
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I get an error: "Script error: Update() can not be a coroutine."

avatar image Peter Alexander · Dec 22, 2009 at 03:36 AM 0
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Ah, of course. You simply cannot block Update. It has to be called every frame, and it has to run the entire way through every frame. If you want something to happen that is timed then you need to use the first code snippet I supplied.

avatar image Peter Alexander · Dec 22, 2009 at 03:38 AM 0
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I added some extra code to show you how you could use this for an attack cool down.

avatar image niter412 · Dec 23, 2009 at 05:28 AM 0
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Thank you very much!

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