Hi, I have a running demo of DOT3 Mapping here: http://planeta.terra.com.br/educacao/alessandroborges/java3d.html
To have it working you must have a Dot3 capable video card and at least 2 texture pipelines. Anything equals or better than a GForce2 MX or Radeon Alessandro Borges --- Mark McKay <[EMAIL PROTECTED]> escreveu: > Paul Gordon wrote: > > >> Fair enough. What about normal mapping (ie, an > RGB image where pixels > >> represent a normal vector at a a given texture > coordinate)? This > >> strikes me as an extremely useful feature which > is starting to get wide > >> usage. > > > > > > Ah yes, this is in fact what I am describing. The > program is fed a > > graphic where the difference in greyscale > intensities corresponds to the > > displacement in the z axis of the points of a > triangle representing the > > 3D surface. Multiply the triangle normal by a > light vector for each > > triangle and you get the highlights/shades > corresponding to the bumps. > > I've got this down pat. You need to use DOT3 > combine mode to applying > > this light effects map to the object's existing > appearance, but this is > > where is fails, giving you a very funky but very > incorrect result. > > > Normal mapping is different from this. Rather than > a greyscale image > that fakes extra height, normal maps provide more > information, giving > you a normal vector on a per pixel basis. It > provides a much more > realistic effect than simple bump mapping. > > Here's one of the better demonstrations I've found. > It has a very low > poly model that after mapping looks almost > raytraced. > > http://www.drone.org/tutorials/normal_maps.html > > Mark McKay > -- > http://www.kitfox.com > > =========================================================================== > To unsubscribe, send email to [EMAIL PROTECTED] > and include in the body > of the message "signoff JAVA3D-INTEREST". For > general help, send email to > [EMAIL PROTECTED] and include in the body of the > message "help". ______________________________________________________________________ Yahoo! Messenger - Fale com seus amigos online. Instale agora! http://br.download.yahoo.com/messenger/ =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
