Brightness Overlay Changing instantly from min to max alpha instead of Incrementing

Question

I'm trying to make a brightness overlay that can be changed by the user using a slider. I'm using a panel (Color is black) for the overlay and editing its alpha with the slider. The slider has a min value of 0 and max of 150, but the slider only has to be 1 or greater for the alpha of the overlay to be at full. When I print the alpha to the console, it says it's only 1, but the alpha on the overlay says is at max (Check gif if there's confusion). How do I set the alpha of an overlay through script using a slider?

• Scripts
• Gif Of What is happening

Reasearch:

• Brightness slider?
• Changing Alpha Material
• Changing Current Alpha

Answer 1

Looked at your code and found the problem.

Things to understand:

Color.a/Alpha min is 0.0f;

Color.a/Alpha max is 1.0f

Color.a/Alpha = float not int.

So change your public void ChangeBrightness(int brightness) to public void ChangeBrightness(float brightness).

On your Slider, make sure that Min Value =0 and Max Value =1; Also make sure that Whole Numbers is not selected.

Right now, the value from the slider is being converted into 0 or 1 due to the int in your function parameter. That's why that weird problem is happening.