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I'd like this function to lerp from 0 to 1 and then exit, as opposed to running for a single frame then exiting. As you can see, I've tried wrapping Mathf.Lerp in a while() loop. However, this consistently crashes Unity. How else could I go about achieving this same effect?

static function fadeIn(fadeSpeed : float)
{   
    // Fades from black to opaque
    Debug.Log("Made it here");
    alpha = 1;
    while(alpha > 0)
    {
        alpha = Mathf.Lerp(1, 0, fadeSpeed * Time.deltaTime);
        Debug.Log("In the while function");
    }
}

Answer 1

0

You'll get an endless loop where alpha always stays at a fixed value between 1 and 0, unless fadeSpeed * Time.deltaTime happens to become 1.

What you probably want to use is a coroutine and modify your Mathf.Lerp to Mathf.MoveTowards instead.

function fadeIn(fadeSpeed : float)
{
    alpha = 1;
    while(alpha > 0)
    {
        alpha = Mathf.MoveTowards(alpha, 0, fadeSpeed * Time.deltaTime);
        yield;
    }
}

Then you can call your coroutine like so:

StartCoroutine(fadeIn(2));

answered Mar 07 '11 at 02:08 AM

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