1

I’m trying to create a pulsing effect using color.lerp. I can get the colors to change in one direction fine using this cript-

var startColor : Color;
 var endColor : Color;
 var duration: float = 5; // duration in seconds
 
5. private var t: float = 0; // lerp control variable
     
 function Update() {
   renderer.material.color = Color.Lerp(startColor, endColor, t);
   if (t < 1){ // while t below the end limit...
10.     // increment it at the desired rate every update:
     t += Time.deltaTime/duration;
   }
 }

But since then I’ve tried to advance the script so the colors will have a pulse effect. However the colors are just flickering at a very fast rate. What in my script is wrong?

#pragma strict
var startColor : Color;
var endColor : Color;
var duration: float = 5; // duration in seconds
var pulselow : boolean = true;
 
private var t: float = 0; // lerp control variable
     
function Update()
{
   	if (pulselow == true)
   	{
   		renderer.material.color = Color.Lerp(startColor, endColor, t);
   		if (t < 1)
   		{
   			t += Time.deltaTime/duration;
   			pulselow = false;
   		}
	}
	
 else
 
   	if (pulselow == false)
   	{
   		renderer.material.color = Color.Lerp(endColor, startColor, t);
   		if (t < 1)
   		{
   			t += Time.deltaTime/duration;
   			pulselow = true;
		}
	}
}

Any suggestions? (make all phrasing easy to understand please…lol)

Thanks

2

You never reset t, and you switch pulselow at the wrong time. You switch Lerp direction every time t is under 1, so basically every frame during the first 5 seconds.

 function Update()
 {
    t += Time.deltaTime/duration;
    if (pulselow) // pulselow is true
    {
        renderer.material.color = Color.Lerp(startColor, endColor, t);
    }
    else // no need for another "if". pulselow was not true so it can't be anything else but false
    {
        renderer.material.color = Color.Lerp(endColor, startColor, t);
    }

    if (t > 1)
    {
        t = 0;
        pulselow = !pulselow; // negate pulselow => toggle it from true to flase or false to true
    }
 }