Increasing the alpha of a material gradually

Unity Engine
1

I have this script which is supposed to make the target become visible gradually:

enum Action {
	Appear_and_Solid = 1
}

var Target : GameObject;
var Select : Action;

function OnTriggerEnter (collision : Collider) {

	if (collision.gameObject.FindWithTag ("Player")) {
	
		switch (Select)
		{
		case 1:
			for (var i : float = 0.0f; i < 1; i = i + 0.0005) {
				Target.renderer.material.color.a = i;
				Target.GetComponent(BoxCollider).enabled = true;
			}
			break;
		default:
			Debug.Log ("No action!");
			break;
		}
		
	}
}

Instead, it just appears instantly. What’s wrong?

2

In the line:

for (var i : float = 0.0f; i < 1; i = i + 0.0005)

use:

for (var i : float = 0.0f; i < 1.0f; i = i + 0.0005f)
3

That didn’t change anything.

4

sorry, try this:

enum Action {

    Appear_and_Solid = 1

}

 

var Target : GameObject;

var Select : Action;

var appear : boolean = false;
var StartTime : float;

function FixedUpdate (){

	if(appear){
		var temp = Target.renderer.material.color;
		temp.a = Mathf.Lerp(0.0f, 1.0f, (Time.time-StartTime)/5);
		Target.renderer.material.color = temp;
		if(temp.a == 1.0f){
			appear = false;
		}
	}

}

function OnTriggerEnter (collision : Collider) {

 

    if (collision.gameObject.FindWithTag ("Player")) {

    

        switch (Select)

        {

        case 1:

            StartTime = Time.time;
            appear = true;

            break;

        default:

            Debug.Log ("No action!");

            break;

        }

        

    }

}

Note: be sure your material is transparent

5

Aha, delaying is missing here. There is no need for changing the whole code. It turns out that there were NO delay for the “for” loop. Adding “yield;” solved the problem.