LineRenderer color gradient not updating

Hello all, I have an issue with the LineRenderer's color gradient not working. Currently I have a LineRenderer with 3 colorKeys and a plain white material set.

I calculate the center colorKeys new time and set it in the following function but the line renderer is not updating.

Code (CSharp):

1.     void SetInteractionPoint(float weight)
2.     {
3.         m_Weight = Mathf.Clamp(weight, 0.0f, 1.0f);
4.  
5.         var ck = m_LineRenderer.colorGradient.colorKeys;
6.         ck[1].time = m_Weight;
7.         m_LineRenderer.colorGradient.SetKeys(ck, m_LineRenderer.colorGradient.alphaKeys);
8.  
9.         Debug.Log(ck[1].time);
10.     }

 

Did you ever find a solution for this? Same thing is happening to me. When I attach the debugger, SetKeys sets the keys, but stepping to the next statement has them reverted. I'm confused...

 

Also having this same issue. Has anyone found a solution? If not will file a bug report.

 

I had this problem, and I guess previous commenters fixed it already.

I am no expert and I don't know why, but it is needed to generate a new Gradient instead of modifying the old one.

        Gradient grad = new Gradient();

        GradientColorKey startGrad = new GradientColorKey(Color.black, 0);

        GradientColorKey progressGrad0 = new GradientColorKey(Color.black, value-0.1f);

        GradientColorKey progressGrad1 = new GradientColorKey(Color.white, value);

        GradientColorKey progressGrad2 = new GradientColorKey(Color.black, value+0.1f);

        GradientColorKey endGrad = new GradientColorKey(Color.black, 1);

        grad.colorKeys = new GradientColorKey[] { startGrad, progressGrad0, progressGrad1, progressGrad2, endGrad };

        li.colorGradient = grad;

"li" of course is the LineRenderer component that we want to modify.

 

I'm having the same issue.

 

This code worked for me:

Code (CSharp):

1.  private float previousAlpha;
2.  
3.         public void ChangeAlpha(float alpha)
4.         {
5.             if (Math.Abs(previousAlpha - alpha) > 0.01f)
6.             {
7.                 previousAlpha = alpha;
8.                
9.                 var copyGradient = LineRenderer.colorGradient;
10.                 var alphaArray = copyGradient.alphaKeys;
11.                 alphaArray[1].alpha = alpha;
12.                 copyGradient.alphaKeys = alphaArray;
13.            
14.                 LineRenderer.colorGradient = copyGradient;
15.             }
16.         }

 

Thanks, This worked for me too.

 

This also worked for me and it's honestly absurd. Every step of this was necessary to get it to work. SetKeys doesn't work. Setting the keys individually doesn't work. Setting them to new structs of alphas keys doesn't work. Yet it lets you do all this. It says they have setting functions but then just ignores the setting. This shouldn't be the only way to make this happen. It's extremely smelly to have to break down every class and struct into completely new versions of it and set it all back. I'm on latest recommended version and this is still the case.

 

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