renderer.material.color not being changed?

[The_sito]

Hey guys, I got a pretty simple problem to solve, but I’m not sure what I’m doing wrong.

I am trying to make an object “fade out” based on distance. These objects are being rendered on their own camera, and will be clipped out at a certain distance, however its pretty jarring without any fading. My plan is to Lerp their color from gray to black (they are set to Additive, so black = transparent) just before they are clipped. This way, they will appear to “fade out.”

However, my code doesn’t produce any results.

Here is my code:

{
	public Transform camR;

	// Update is called once per frame
	void Update () 
	{
	    float dist = Vector3.Distance(camR.position, transform.position);
		print ("Distance to CamR:" + dist);

		if(dist >= 20.0f)
		{
			renderer.material.color = Color.Lerp(Color.grey, Color.black, Time.deltaTime);

		}
		else if (dist <20.0f)
		{
			renderer.material.color = Color.Lerp(Color.black, Color.grey, Time.deltaTime);
		}
	}
}

Any help is greatly appreciated

[yogee]

try this

var duration = 5.0;
 void Update () 
    {
    var t : float = Mathf.InverseLerp (0, duration, Time.time);
        float dist = Vector3.Distance(camR.position, transform.position);
 
       if(dist >= 20.0f)
       {
         renderer.material.color = Color.Lerp(Color.grey, Color.black, t);     
       }
       else if (dist <20.0f)
       {
         renderer.material.color = Color.Lerp(Color.black, Color.grey,t);
       }
    }

[Eric5h5]

The third parameter in Lerp is a float between 0 and 1. It’s like a percentage. Time.deltaTime will normally be a very small number, so your code will pretty much always return a color near Color.grey (in the first Lerp) or Color.black (in the second Lerp). I would suggest using a percentage based on distance rather than Time.deltaTime.