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the problem with rotating the camera is that you have to place the camera at
the origin, rotate it, then translate it.
Adjusting the sky vector does this with less of a head ache.
Normal cameras are placed at the location, then pans around it's y-axis to
match the look_at vector, then tilts up or down to look directly at the look_at
point.
The sky vector alters the cameras Y axis. Since I see this question asked by
more than one user, I'm going to put up a small tutorial on my website on how
this works...
Nathan Kopp wrote:
> I stand corrected.
>
> -Nathan
>
> Nieminen Mika wrote:
> >
> > Nathan Kopp <Nat### [at] kopp com> wrote:
> > : I really don't think rotate will roll the camera... it just moves its
> > : position.
> >
> > plane { y,-1 pigment { checker rgb 1,rgb .5 } }
> > plane { -y,-1 pigment { checker rgb x*1,rgb x*.5 } }
> > light_source { 0,1 }
> > camera { location -z look_at 0 rotate z*30 }
> >
> > http://www.cs.tut.fi/~warp/rotate.jpg
> >
> > --
> > main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> > ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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