How to use Alpha from color?

Hi there!

I have a Properties in my 2D sprite shader

Properties{
_Color ("Tint", Color) = (0, 0, 0, 1)
_MainTex ("Texture", 2D) = "white" {}
}

you can see _Color for property just for change a color of object
But how to use alpha value from this color?

in frag shader

fixed4 frag(v2f i) : SV_TARGET{
fixed4 col = tex2D(_MainTex, i.uv);
float blender = _Color.a; <---- I really want to use _Color.a add to float blender
return col;
}

this is possible?

 

Use it for what?

You're already "using it", you're assigning it to the float blender and then doing nothing with it.

 

Ok Thanks you very much But I know how it work already!

 

I'm confused on what the issue it then Or do you mean you figured it out?

 

@Rachan when you solve your problem it would be polite to tell here how you did it. This way others can benefit from the answer when they are searching a solution to a similar issue. After all, this is not a "work for free" forum where you get free consultation and delete the thread after your problem got sorted out.

 

Actually I just use that variable by just call
float blender = i.color.a;

I use alpha of a color and then it ok now