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and of course one of those files was using echo.inc
it all so confusing!!!
:)
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Attachments:
Download 'laser.zip' (175 KB)
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Another thing I been wanting to see in pov code,
prism refraction that looks like:
http://en.wikipedia.org/wiki/Prism_%28optics%29
And something about polarization
http://en.wikipedia.org/wiki/Polarization
can wipe entire brain clusters with that page
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"alphaQuad" <alp### [at] earthlink net> wrote:
> trace seems to fail on these CSG lenses, so ... input radius and return x of the
> curve.
>
> in other words, if you have the light radius at lens2_impact, you have the
> distance to lens center
more like
#declare concav_glass_ = // f = -3.99984
#declare maglass_ = // f = 8.275885
Add focal lengths
4.35 was close, v. almost 4.3
should put it in focus position, just had to stare at it long enough
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great thinking implies great mistakes,
but heartless ambition is a plague
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Attachments:
Download 'laserfocus_2.png' (126 KB)
Preview of image 'laserfocus_2.png'
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Jim Holsenback wrote:
> I had a look at what's there now and found nothing about lasers.
there is advanced/optics.pov, at least there was in 3.6
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Christian Froeschlin <chr### [at] chrfrde> wrote:
> Jim Holsenback wrote:
>
> > I had a look at what's there now and found nothing about lasers.
>
> there is advanced/optics.pov, at least there was in 3.6
according to that you can also add,
photons {refraction off reflection off}
to area light source as opposed to,
photons {refraction on reflection on}
in laser.
Havent tried it yet, expecting a less interesting scene
also rgbf .99 glass has no shadow, in contrast to .9 glass
this img shows photons penetrating and reflecting several flat pieces...
recollecting a divergence seems to equal too much light loss.
also tried a wide beam reflected off only flat reflectors, still didnt make it
through second lens.
Only direct light made it thru 2 lenses of .9 glass.
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Attachments:
Download 'optics.png' (46 KB)
Preview of image 'optics.png'
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I can see that you've been very busy there aQ. It seems that the zip file i
downloaded to work on is out of date with the images you've posted. Perhaps
a day late and a dollar short, anyway here's what I've done.
I've cleaned up the source, added four quality levels (debug -> best). This
image was run a Quality=2 it took about 26 minutes. I didn't have much luck
with the curved reflectors (convex/concave) so in this setup they are flat.
They also have a front and back, it didn't seem to make sense to have the
entire object reflective. It just adds to render time. I would also reverse
the order of the lenses. It seems to make better sense to make the beam
bigger with the convex lens then back to original size with the concave
lens. The other way around and I think photon spacing in the global block
would have to be even smaller. I'm wondering if curved surfaces might be
better as iso_surfaces, and with the correct formula made to be a true
parabolic surface rather than the hit or miss approach with differencing and
uneven scaling spheres. An improvement more along esthetic lines would to
frame and make stands for the reflectors and lenses rather than have them
just basically floating in space. Lastly I opted for a single light source
(the laser). Both the light and scattering media in the container are white.
I used absorption media to turn the beam green. I'll post the source over in
scene-files.
Cheers Jim
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Attachments:
Download 'laser_effect01.jpg' (22 KB)
Preview of image 'laser_effect01.jpg'
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"Jim Holsenback" <jho### [at] hotmailcom> wrote:
> I can see that you've been very busy there aQ.
Not really. Running out of ideas. Fixed the car yesterday, think it was mainly
the distributor cap. Gotta get her hot and really check it.
> It seems that the zip file i
> downloaded to work on is out of date with the images you've posted. Perhaps
> a day late and a dollar short, anyway here's what I've done.
>
> I've cleaned up the source, added four quality levels (debug -> best). This
> image was run a Quality=2 it took about 26 minutes. I didn't have much luck
> with the curved reflectors (convex/concave) so in this setup they are flat.
> They also have a front and back, it didn't seem to make sense to have the
> entire object reflective. It just adds to render time. I would also reverse
> the order of the lenses. It seems to make better sense to make the beam
> bigger with the convex lens then back to original size with the concave
> lens. The other way around and I think photon spacing in the global block
> would have to be even smaller. I'm wondering if curved surfaces might be
> better as iso_surfaces, and with the correct formula made to be a true
> parabolic surface rather than the hit or miss approach with differencing and
> uneven scaling spheres. An improvement more along esthetic lines would to
> frame and make stands for the reflectors and lenses rather than have them
> just basically floating in space. Lastly I opted for a single light source
> (the laser). Both the light and scattering media in the container are white.
> I used absorption media to turn the beam green. I'll post the source over in
> scene-files.
Interested to see what you've done.
With nothing else to do, left this one running last night; 9.5 hrs,
1 + f1 + f2 between lenses. Divergent light must mean a greater focal length for
lens1 by ?
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Attachments:
Download 'lasereflect_00_1.png' (190 KB)
Preview of image 'lasereflect_00_1.png'
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Any example with a lens in it, or any example called "optics.pov", that does not
have the ior focal length function, used or not, is a file sorely lacking.
Am I the only technically minded one? Certainly not. Anyone not
technically-minded, should be.
Just my POV.
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alphaQuad nous illumina en ce 2008-07-26 15:00 -->
> Another thing I been wanting to see in pov code,
> prism refraction that looks like:
> http://en.wikipedia.org/wiki/Prism_%28optics%29
Add some reflection to your finish and some dispertion to your interior. Use a
strong light. Don't forget to have conserve_energy and fresnel turned on.
>
> And something about polarization
> http://en.wikipedia.org/wiki/Polarization
>
> can wipe entire brain clusters with that page
>
Not possible now.
--
Alain
-------------------------------------------------
I used to have an open mind but my brains kept falling out.
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