[Algorithms] Theory behind NHHH mapping

[Siddharth H. <gda...@em...>]

[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 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 to the Hurricane Katrina relief effort.