Lerping over a specific period of time

Questions & Answers
1

This question is coming directly out of my ignorance, so bear with me.

Lerp and I are good friends. We get along pretty well. Part of this is that I basically regard Lerp a a magic spell. My Lerps usually look like this:

			tempAlpha = Mathf.Lerp(objectToFadeIn.color.a,1,Time.deltaTime * fadeSmooth);

And everything works great. But now I want to Lerp over a VERY SPECIFIC period of time, say 4 seconds. Short of just taking the interval and dividing it by the duration and looping it, what’s the best way to Lerp over a predetermined period of time?

2

Well I am by no means a pro but here is an example script that makes a light change from light to dark over a certain time:

public float fadeSpeed = 2f;

if (this.light.intensity<0) this.light.intensity=0;
			this.light.intensity = Mathf.Lerp(light.intensity, 0f, fadeSpeed * Time.deltaTime);