Cg tutorial port in Unity.

Unity Engine
1

Hi,
I try to port some of the code from the Cg tutorial in Unity.
The Cg tutorial is here , it is a tutorial about writing shaders.
I post the results in the wiki, you can find it here.
If you have any suggestions - corrections - whatever, please post them here.
Right now I have ported up to Chapter 2 ( included ).
If you find it useful, please consider a donation ( at my blog in the signature ).
Thanks :slight_smile:

2

Oh…wow…this is what i’ve been looking for all this time…O.o… thank you soo much…
Btw…will you port the lighting tutorial too? (just curious )… thank you sir :slight_smile:

3

I try to port all the code, chapter by chapter, slowly.
A great resource for lighting is lihgting.cginc
Ref : Unity - Manual: Custom lighting models in Surface Shaders

4

This is a very good idea. I think a lot of people are scared off by the Cg Tutorial because they don’t know enough about ShaderLab to put the Cg in the right context.

5

True…Because it’s so confusing since there’s no example about porting CG to Shaderlab ( Well i haven’t fine any ) :slight_smile:

6

Shaderlab uses Cg, so it’s not really a matter of porting. Hooking up your shader properties is easy–just read the manual.

Getting it to work with Unity’s lighting environment is hard, as it would be with any engine.

7

rea:

Lighting is covered in Chapter 5. I hope that I will be able to get there :slight_smile:
Daniel :

As I slowly port the code, I find a few more caveats.
For example, the way Unity handles offset - tiling. It uses the texcoord.zw.
I managed to make it work in the end but it is not so straightforward.
Or the fact that all the members of a a2v ( application to vertex shader structure ) may only have specific names, e.g. only float4 vertex : POSITION works in this context.
Perhaps there are more. They are documented but not so easy to find.
I stared at a pink cube many times trying to port the examples !
I think that if you try to use the code from the Cg tutorial in Unity you have to
-embed it in a shader ( ShaderLab shader ).
-modify it so it integrates with unity.
I figured it is called porting. If you have another suggestion, I am interested in calling it properly.

Thanks for your interest, I will post again here when next chapter is finished

8

The Lighting Part is confuse me the most…:slight_smile: