In article <3ac73253@news.povray.org>, "Jan Walzer" <jan### [at] lzernet> 
wrote:

> >     (0.297*Color.red + 0.589*Color.green + 0.114*Color.blue)
> > This uses the same equation that POV uses internally.
> 
> Where does POV use a RGB2Grey computation do ?

MegaPOV has a GRAYSCALE() macro in colour.h. I think this replaces the 
use of many separate equations, sometimes completely different ones, in 
the official version.
MegaPOV uses it for image_pattern, pigment functions, and a few other 
things. It may be used as an estimate of the brightness of the color in 
some places.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

<><

Post a reply to this message