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"Anthony D. Baye" <Sha### [at] hotmail com> wrote in message
news:42efcdf9$1@news.povray.org...
> Christoph Hormann wrote:
> > Anthony D. Baye wrote:
> >
> >>
> >> So my question is: Is there an eficient way to model Optical
> >> fibers, so that they not only glow, but transmit the light along the
> >> length as well.
> >> Naturally, I'll continue my own experimentations. I would however
> >> appreciate any thoughts people might have on the subject.
> >
> >
> > The transmission of light is nothing that makes sense to simulate in
> > POV-Ray since it has no effect on the image POV-Ray renders (light
> > itself isn't visible). Therefore using emitting media for the glow and
> > placing a spotlight at the end is the way to go.
> >
> > Christoph
> >
> Hey Christoph,
>
> Thanks for the input. The only problem that I see with your solution
> is that, if I were trying to model one of those fiber optic displays
> (f/ex. The flowers with the FO strands in them) I would have hundreds of
> spotlights in my scene. The light calculations would take forever.
How many strands are you trying to simulate? If you're talking more than just a
few, the number of calculations to properly simulate the total internal
reflection of fibre optics using photons would be *astronomical*.
It doesn't mean it can't be done, but it will take so much time that I suspect
it won't be worth doing.
High quality fibre optics don't glow along the entire fibre, either - if it was
to glow along the entire fibre it means that total internal reflection isn't
being achieved, and therefore the fibre is being *very* inefficient (it's losing
most of its light out the sides of the fibre, rather than out the end). The
light should only be escaping from the end of the fibre.
Lance.
thezone - thezone.firewave.com.au
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