Ahhh, thank you.  NOW it makes much more sense.  hehe.

"Tim Nikias v2.0" <tim### [at] gmxde> wrote in message
news:3ee0bb13$1@news.povray.org...
> Look at 6.1.4.6. in the docs. The Trace you've
> looked at is part of the scripted Raytracer implemented
> in POV-SDL.
>
> --
> Tim Nikias v2.0
> Homepage: http://www.digitaltwilight.de/no_lights
> Email: Tim### [at] gmxde
>
> > Very nice.
> >
> > I guess I'm rather new at POV, because I can't figure out how the
trace()
> > macro can be used to 'arrange them on the surface'.  From the POV
> > documentation:
> >
> > "This is the macro we call for each pixel we want to calculate. That is,
> the
> > starting point of the ray is our camera location and the direction is
the
> > direction of the ray starting from there and going through the "pixel"
we
> > are calculating. The macro returns the color of that pixel."
> >
> > From this I gather that the trace() macro returns a color.  How can a
> color
> > be used to arrange blades of grass on a surface?  I would assume that
> you'd
> > need a coordinate and direction or something along those lines, not a
> > color...  but as I said, I'm rather new at this.  There's probably some
> > documentation that I've overlooked that explains it but I can't seem to
> find
> > it.  Would you please be so kind as to explain it to me, or refer me to
> the
> > appropriate section of the documentation?  Thank you.
> >
> > Sun.
> >
> >
> >
> > "moj" <moj### [at] btinternetcom> wrote in message
> > news:3ee08f50@news.povray.org...
> > > Hi everyone
> > >
> > > I wasn't going to post this, but I just saw Norbert Kern's pipetree
> > > image so it seemed appropriate to post another example of an
adaptation
> > > of one Gilles' excellent macros  (not sure how you post a link to
> > > another thread but it's in povray.binaries.images).
> > >
> > > This uses the makeblade part of mgrass.inc to generate a "pallette" of
> > > 50 blades, then uses the trace() function to arrange them on the
surface
> > > of a lathe-type object (actually a rotation from Moray)
> > >
> > > The colours for the grass are taken straight from the irtc winner a
few
> > > months ago:
> > >
> > >   http://www.irtc.org/ftp/pub/stills/2003-02-28/radiogrv.jpg
> > >
> > > I've been playing with povray for a couple of months now (when I
should
> > > have been revising for finals :-) and this is my favourite object I've
> > > made. I'm just not sure what to do with it...
> > >
> > >
> > > moj34
> > >
> > >
> >
> >
>
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> >
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> >
> >
>
>

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