RE: [Algorithms] Theory behind NHHH mapping

[Alex V. <ale...@na...>]

The NHHH method is published in Game Programming Gems 3, Section 4.18,
"Textures as Lookup Tables for Per-Pixel Lighting Computations"

 

Thanks,

Alex Vlachos

 

  _____  

From: gda...@li...
[mailto:gda...@li...] On Behalf Of
Siddharth Hegde
Sent: Wednesday, October 05, 2005 9:21 AM
To: gda...@li...
Subject: [Algorithms] Theory behind NHHH mapping

 

[Re-post with new subject. Screwed up the subject the last time. Sorry]

 

Hi,

 

I tried to do specular mapping using pixel shaders 1.4 and the NHHH mapping
method used in  <http://www.ati.com/developer/R8500PointlightShader.html>
http://www.ati.com/developer/R8500PointlightShader.html This seemed to work,
but with few minor problems. Before I solve these problems I would like to
know the theory behind NHHH mapping. I tried to do a google but with almost
nothing. Does anyone know a website/book where I can find the theory behind
this method.

 

Thanks,

 

- Siddharth

  _____  

Yahoo! for Good
Click here to donate <http://store.yahoo.com/redcross-donate3/>  to the
Hurricane Katrina relief effort.