Re: approximation to pow(n,x)?
Robin Green <[email protected]>
| Newsgroups | gmane.games.devel.algorithms |
|---|---|
| Message-ID | <[email protected]> |
The difference is in the shape of specular highlights. Where Phong specular highlights at grazing angles are streched out moon shapes, the Blinn half-angle highlights retain a more circular shape. Real world photos of specular surfaces at grazing angles more closely resemble Blinn shapes than Phong, plus the Blinn model has some good physical reasoning behind it to do with reflection from distributions of microfacets. http://img22.imageshack.us/img22/7/blinn.jpg http://img526.imageshack.us/img526/758/phong.jpg - Robin Green. On Wed, Nov 4, 2009 at 10:14 AM, Jeff Russell <[email protected]> wrote: > Not to derail the conversation, but I've never really understood why half > vectors are preferable to an actual reflection vector, either in terms of > efficiency or realism. I've always just used reflection, am I missing > something? ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ GDAlgorithms-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/gdalgorithms-list Archives: http://sourceforge.net/mailarchive/forum.php?forum_name=gdalgorithms-list