Missing/Changed LIGHT_ATTENUATION macro?

This may be a little premature, but it seems in the 2018.1.0b1 preview (from the InputManager release), compiling a shader with the LIGHT_ATTENUATION() macro gives a syntax error (unexpected token ';'). Has this macro been removed/altered in 2018.1 and/or has it been replaced with anything?

Code (csharp):

1.  
2. float4 frag(VertexOutput i) : COLOR {
3.    // ...
4.    float attenuation = LIGHT_ATTENUATION(i);
5.    // ...
6. }
7.  

Replacing the macro with just a float literal (like 1.f) removes the error.

 

We are seeing this issue too on 2018.1.0b2 and are interested to know if there is a replacement planned?

 

LIGHT_ATTENUATION has been deprecated since Unity 5 shipped in 2015. It was replaced with UNITY_LIGHT_ATTENUATION.

Note the various TRANSFER_SHADOW macros were also deprecated. See this tutorial for how to update your shaders to work.
http://catlikecoding.com/unity/tutorials/rendering/part-17/

 

Thanks!

I noticed that the *UNITY_LIGHT_ATTENUATION* code example shows ;

Code (CSharp):

1. UNITY_LIGHT_ATTENUATION(attenuation, i, i.worldPos.xyz);

That has to be ;

Code (CSharp):

1. UNITY_LIGHT_ATTENUATION(attenuation, i, i.posWorld.xyz);

 

That would depend on your shader. If you've named the world position variable i.posWorld, then yes, otherwise no. It might be a.MonkeysUncle if someone so chose.

 

Apologies, you're right of course.
I'm embarrassed. Thanks!

 

I checked out the tutorial, but I'm having a difficult time understanding how to apply the UNITY_LIGHT_ATTENUATION stuff.

My shaders use something basically the same as the example at the start of this thread, could you give an updated version of the example shown above? Thank you very much for the tutorial, by the way. Will be referring to it in the future.

 

UNITY_LIGHT_ATTENUATION(attenuation, i, i.worldPos.xyz);

That defines and sets a variable named attenuation that has both the shadow and light attenuation value.

 

You guys saved me, thanks!

 

Hi guys,
I would like to use the LIGHT_ATTENUATION in my shader. But I can't seem to find an up-to-date explanation how to use it even in the documents. :/ My bad... Does anyone have any experience in 2018?

 

Any chance to find documentation on what the UNITY_LIGHT_ATTENUATION macro actually does? Or, at east, where is it defined, so i can see the code for myself, if there are no docs?
The LIGHT_ATTENUATION only took vertex output construction as an input, but it looks like it's not the case anymore. What variables does the updated macro take?

 

Download the builtin shader source (see the first post on the shader forum).

 

Thank you very much bgolus. Doing as you said right now.

 

Hi, I noticed that 'UNITY_LIGHT_ATTENUATION' enables both the shadows and reflected lightings at the same time. Is there an option which enables only the shadows pls?

 

Yes, LIGHT_ATTENUATION.

 

In 2020, If someone is looking to simply get the attenuation & color for the directional light,
use this: https://forum.unity.com/threads/how-to-get-the-intensity-of-light-on-shader.142305/#post-1610142