General

Re: Shader Programming

digitalerr0rDCC — Thu, 28 May 2009 12:34:41 GMT

Aye, there are some good shader tutorials.

Feel free to read my tutorials on the link Cesar Fazani wrote. A book is also quite good to have, and there are many free books on nvidia.com:
http://developer.nvidia.com/page/documentation.html

Check out that site for great articles!

Re: Shader Programming

Cesar Fazani — Sun, 17 May 2009 18:54:42 GMT

I think you should first read some basic tutorials that cover how shaders works.
In Petri´s Tutorial 1: Ambient light you will find a introduction about shaders. He also have several good tutorials you should look at.

I think you should study a little with examples and tutorials from the web before try by yourself. Until you get it right.

Re: Shader Programming

Byron Nelson — Sat, 16 May 2009 22:11:00 GMT

Shader Programming

Majikat — Sat, 16 May 2009 21:57:35 GMT

Hi,

I've taken an interest in shader programming to make effects to use in XNA. Shader programming, or more specifically, HLSL is not something with which I'm familiar. I'm an experienced coder and I'm familiar with the maths of 3D lighting/shading etc. so I don't need help in that area.

I've looked at a few .fx files and tutorials in an attempt to figure out how to create my own. However, I'm finding the tutorials a little vague and they generally seem to give how to's in specific shaders. They don't tell me how the return values of pixel shaders are used in the final rendering.

For example, I'd like to create a shader that could do some glow effects. I'd like to write one of my own instead of downloading it, if only as an educational exercise. Taking this example, what should the output of a pixel shader return? Since I don't know how the return value of a pixel shader i used, it's tricky to figure out exactly what should return.

I'd be grateful if somebody could point me in the direction of some docs that would help me with what i've discussed. I'm planning to use something like NVidias FX Composer to produce shaders, but I would still like to understand what I'm doing.

Thank you for your time.

Majikat.