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Question by Cervelx · May 14, 2017 at 07:27 PM · scripting problemalpha

How to fade in a GameObject with alpha ?

Hi guys ! I found this script to fade in a game Object, it work but i want that the alpha stop at 140, now in this moment it go at 255... there is a way to stop the Fade at 140 ? Thank you :)

  public class FadeAlpha : MonoBehaviour {
  [SerializeField] private float fadePerSecond = 2.5f;
 
  private void Update() {
      var material = GetComponent<Renderer>().material;
      var color = material.color;
 
      material.color = new Color(color.r, color.g, color.b, color.a + (fadePerSecond * Time.deltaTime));
  }
  }
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Answer by UnityCoach · May 14, 2017 at 07:41 PM

You can use an AnimationCurve to do this.

 public class FadeAlpha : MonoBehaviour
 {
     [SerializeField] private AnimationCurve fadeCurve;
     Renderer _renderer;
     Color _color;
     float _timer = 0f;
     
     private void Awake ()
     {
         _renderer = GetComponent<Renderer>(); // do this in awake, it has an impact on performances in Update
         _color = _renderer.material.color;
     }
     
     private void Update()
     {
         _timer += Time.deltaTime;
         _color.a = fadeCurve.Evaluate (_timer);
         _renderer.material.color = _color;
     }
 }
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avatar image Cervelx · May 14, 2017 at 07:59 PM 0
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Thank you.. you are a pro !

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Answer by Fritsl · May 14, 2017 at 08:02 PM

You might instead want to look into using tween libraries - http://dotween.demigiant.com/ as an example ;)

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