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3
Question by emc233 · Nov 13, 2013 at 03:26 AM · alpha

How can I change the alpha in real time. (see pic)

alt text

How can I change the value of the alpha channel at run time. The one that is in the slider. Right now A = 247.

This code is wrong:

this.renderer.material.color.a = count;

it changes the alpha of something else.

untitled.png (76.3 kB)
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Best Answer

Answer by LijuDeveloper · Nov 13, 2013 at 04:28 AM

Color.a = Value between 0 and 1 using for alpha color

Try this

 using UnityEngine;
 using System.Collections;

 public class Example : MonoBehaviour 
 {
     public GameObject     myGameObj;
     public Color        myColor;
     
     void Start()
     {
         myColor = myGameObj.renderer.material.color;
     
     }
 
     void Update()
     {
         if(Input.GetKeyDown(KeyCode.A))
         {
             
             myColor.a = (247f/255f); // for alpha color 247
             myGameObj.renderer.material.color = myColor;
         
             
         
         }
         if(Input.GetKeyDown(KeyCode.B))
         {
             
             myColor.a = (200f/255f); // for alpha color 200
             myGameObj.renderer.material.color = myColor;
         
         }
     }
     
 
 }
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Answer by paulygons · Nov 13, 2013 at 03:55 AM

It might be revealing what "something else" it is changing. You could be much more descriptive about your problem. Using C# maybe something like this:

 Color newColor = renderer.material.color;
 newColor.a -= 0.1f;//this can change it over time
 renderer.material.color = newColor;
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