Using Yield in C# but within Update...

Unity Engine
1

I have this 2 methods…

    private IEnumerator TimeBetweenArrowChanges()
    {
        Debug.Log("TIME - ");
        yield return new WaitForSeconds(2f);
        Debug.Log("2 Seconds");
    }

    private IEnumerator UpdateArrowRotation()
    {
        for (int i = 0; i < ArrowRotation.Count; i++)
        {
            Debug.Log("Check");

            yield return StartCoroutine("TimeBetweenArrowChanges");
            gameObject.guiTexture.texture = ArrowRotation[i];
        }
    }

And I use UpdateArrowRotation() in the update and nothing shows in the log, and it won’t let me use the update as a IEnumerator, what should I do?

2

I don’t use StartCoroutine with strings; I never found stopping them with StopCoroutine predictable enough to use. You don’t need gameObject. before your guiTexture.

void Update () {
	if (condition) {
		StartCoroutine(UpdateArrowRotation());
		condition = false;
	}

}

IEnumerator UpdateArrowRotation () {
	for (int i = 0; i < ArrowRotation.Count; i++) {
		Debug.Log("Check");
		yield return StartCoroutine(TimeBetweenArrowChanges());
		guiTexture.texture = ArrowRotation[i];
	}
}

IEnumerator TimeBetweenArrowChanges() {
	Debug.Log("TIME - ");
	yield return new WaitForSeconds(2F);
	Debug.Log("2 Seconds");
}
3

Thanks, the only thing is that I need for the UpdateArrowRotation to always run… continuously.

Any thoughts?

4

If it’s running continuously why even use co-routines? - just have a it as a regular function or a script attached that only does this per update.

5

Honestly, I don’t know exactly what you’re trying to do; to me, it looks like you just piled on unnecessary complexity. Here’s my best guess at what you actually want:

IEnumerator Start () {
	int i = 0;
	WaitForSeconds wait = new WaitForSeconds(2);
	while (true) {
		guiTexture.texture = ArrowRotation[i];
		i = i == ArrowRotation.Count - 1 ? 0 : i + 1;
		yield return wait;	
	}
}
6

I have a guiTexture of an Arrow, like this:

600×600 13.4 KB

And I want to curve the arrow, I have the images in a List, so what I do is after 100ms, change the image to the next stage of the curving.

That’s what I want to do

7

I got that. What I didn’t understand was why you were filtering that through multiple coroutines.

What about the code from my last post?

8

If there is another way of doing that without using yield, please tell me how :P.

It needs to wait actually 0.05seconds between each image to change…

9

I didn’t in any way suggest not using yield. But I do suggest that having two levels of coroutine is unnecessary. I’m not willing to help anymore unless you tell us how the last code example I gave you isn’t the right solution for you.