Passing a rectangle as a parameter seems to have no effect on original using StartCoRoutine

Question

Hi,

I'm trying to use a function where I pass a Rect as a parameter and modify the properties of that Rect, but it seems to have no effect when using StartCoRoutine. I can pass in the rectangle, but the "configureRectGroup" properties does not change. Is this expected behavior? Thanks!

Here's the relevant source:

public class MainMenu : MonoBehaviour {

public GUISkin mainMenuSkin; public GUISkin configureSkin;

// . Configure vars private Rect configureRectGroup = new Rect (0, 0, 240, 0); private Rect configureRect = new Rect (0, 0, 197, 336); // .

void Start () {

 StartCoroutine(ScaleIn(configureRectGroup, 0.333f, 0, configureRect.height));

private IEnumerator ScaleIn(Rect rec, float seconds, float fromHeight, float toHeight) { float t = 0.0f;

 while (t &lt; 1.0f)
 {
     t += Time.deltaTime * (1.0f/seconds);

     rec.height = Mathf.Lerp(fromHeight, toHeight, Easing.Ease(t, Easing.EaseType.In));

     rec.y = Screen.height / 2 - (rec.height / 2);

     yield return true;
 }

}

}

Answer 1

Best Answer

Answer by Peter G · Dec 15, 2010 at 09:23 PM

You would need to pass it by reference (ref and out keywords) since it is a value type, a struct, but:

But in my own experiences Unity does not allow you to pass parameters by reference in iterators like that (using while() then yield return something).

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Chris Ellingsworth · Dec 15, 2010 at 09:29 PM 0

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Ahh, it's a struct. Yeah, I tried ref and out, which the compiler threw an error. Thanks Peter!

Passing a rectangle as a parameter seems to have no effect on original using StartCoRoutine

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