Gui slider for transparency from 0 till 100

Unity Engine
1

As the title says i’m in need of a GUI slider that changes my 3d objects transparency from 0 till 100 depending on the slider i know the code to change my materials transparency but how do i connect that to the slider?

color.a = 0;

thanks guys

2

use a GUI.HorizontalSlider…

then have it set the alpha directly…

//var viewObject : Transform;
var hSliderValue = 1.0;

function OnGUI () {
	hSliderValue = GUI.HorizontalSlider (Rect (25, 25, 100, 30), hSliderValue, 0.0, 1.0);
	renderer.material.color.a=hSliderValue;
	//viewObject.renderer.material.color.a=hSliderValue;
}
3

Can anyone tell me how to do this with c# please? I was following a tutorial trying to convert this piece of code

 public void ToggleAlpha(float minV, float maxV)
	{
		if(renderer.material.color.a > minV  decr)                //Works fine
			renderer.material.color.a -= 1*Time.deltaTime;    //Doesn't work
		else
			renderer.material.color.a += Time.deltaTime;      //Doesn't work
		
		
		
		if(renderer.material.color.a > maxV  decr)               //Works fine
			decr = true;
		else if(renderer.material.color.a < minV)                    //Works fine
			renderer.material.color.a += Time.deltaTime;    //Doesn't work
	}

I don’t remember what the error was at the moment. I think it was something along the lines of its trying to a value into nothing and it doesn’t like it. So it tells me to store it into a temp variable.

4

Because Material.color is a property that returns a value type, you can’t manipulate the elements of the returned value directly in that way. You can however write something like this (untested):

var color = renderer.material.color;
color.a = ...;
renderer.material.color = color;

I’d recommend wrapping this up in a function if you need to do it more than once.

5

You might be able to create an extension method for the Material class or even the Color class. You can keep it in context better that way.