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Ron said:
> I haven't looked at it yet to see how difficult it
> will be. The previous dispersion patch was a major code change.
>
Well, this one's a nice, simple change. Just replaces one function in
one source file with some fancier stuff, and small changes to a few
other files to add the new keywords. Should blend in with superpatch
or other patches no trouble.
As for those who ask for an executable, I wish I could be helpful, but
my home computers are strictly Linux only. I suppose I should at least
put the linux version of dispersion-povray on my web site.
--
Daren Scot Wilson
Member, ACM
dar### [at] pipeline com
www.newcolor.com
--
"A ship in a harbor is safe, but that is not what ships are built for"
-- William Shedd
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A certain Mr. Kopp wrote:
> and I've got some ideas on how to do it which turned out to
> be very similar to the "photon map" by Henrik Wann Jensen. Jensen's work with
> photon maps seems to have been a success, both in terms of image quality and in
> rendering speed. You can read about it at:
> http://www.gk.dtu.dk/home/hwj/
> http://www.gk.dtu.dk/home/hwj/papers/ewr7/index.html
Yes, nice stuff! I was surfing for caustics research yesterday, and
came upon another project, by Steve Collins, for his PhD thesis that
involved a complete ray tracing lighting model, including nice caustics,
at http://isg.cs.tcd.ie/scollins/work.html
There seem to be several independent attempts to add caustics and
related effects to ray tracers - we should gather a list of all them,
summarize each put that on a web page.
I wonder if the POV-Team had considered caustics in the past?
--
Daren Scot Wilson
Member, ACM
dar### [at] pipeline com
www.newcolor.com
--
"A ship in a harbor is safe, but that is not what ships are built for"
-- William Shedd
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On Mon, 07 Dec 1998 01:25:07 +0000, Daren Scot Wilson
<dar### [at] pipeline com> wrote:
>Ron said:
>> I haven't looked at it yet to see how difficult it
>> will be. The previous dispersion patch was a major code change.
>>
>
>Well, this one's a nice, simple change. Just replaces one function in
>one source file with some fancier stuff, and small changes to a few
>other files to add the new keywords. Should blend in with superpatch
>or other patches no trouble.
I've looked at it and it looks like it should be no problem to add,
but I'll have to integrate it with wyzpov, which might be no small
feat. BTW, your patch file seems to have some duplicated lines in
express.c and a couple other places, unless I'm just not reading
it right (which is quite possible)
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> BTW, your patch file seems to have some duplicated lines in
> express.c and a couple other places, unless I'm just not reading
> it right (which is quite possible)
Just checked... ya, oops, those really are duplicated lines - just nuke
the extras. I will make a new patch and post it here. There's a small
improvement to be added, too.
--
Daren Scot Wilson
Member, ACM
dar### [at] pipeline com
www.newcolor.com
--
"A ship in a harbor is safe, but that is not what ships are built for"
-- William Shedd
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Sorry for the 'newbee' question but where can I get the pov file for
the "Cornell Box"??
JK
Nathan Kopp wrote:
>
> Interesting that you should mention this. I recently got the O.K. from one of
> my professors to do an undergraduate research project next semester to add
> backwards raytracing to POV-Ray. I've been doing a lot of thinking about this
> over the past month and I've got some ideas on how to do it which turned out to
> be very similar to the "photon map" by Henrik Wann Jensen. Jensen's work with
> photon maps seems to have been a success, both in terms of image quality and in
> rendering speed. You can read about it at:
> http://www.gk.dtu.dk/home/hwj/
> http://www.gk.dtu.dk/home/hwj/papers/ewr7/index.html
>
> An example of rendering time (from Jensen's paper):
> Machine: 100Mhz Pentium with 32 megs of RAM
> -A diffuse Cornell box (standard radiosity test scene)
> Preprocessing (about 300k 'photons'): 67 sec
> Rendering (at 1280x960): 8 min
> -A glossy Cornell box
> Preprocessing (about 380k 'photons'): 56 sec
> Rendering (at 2560x1920): 50 min
>
> A render of the diffuse Cornell box at the same resolution by the Radiance
> renderer took 60 minutes.
>
> My original work will not be as extensive as Jensen's, but I will try to do it
> in such a way that future enhancements will be easy for myself or others to
> add.
>
> Because I'll be doing this for college credit, I will be able to justify
> spending some extra time on POV. :-) However, input from other POV programmers
> will be very helpful. If I can get enough done, I really want to combine this
> with your dispersion patch, which could produce some really nice images.
>
> -Nathan Kopp
>
> Daren Scot Wilson wrote:
> >
> > Alright, everyone keeps asking about caustics, of one sort or another,
> > so maybe next week I'll tinker around with adding it.
> >
> > Before I start, though, has anyone made or found a list of previous
> > attempts that have failed? I'd hate to reinvent a wheel and discover
> > the hard way that it won't roll...
> >
> > --
> > Daren Scot Wilson
> > Member, ACM
> > dar### [at] pipeline com
> > www.newcolor.com
> > --
> > "A ship in a harbor is safe, but that is not what ships are built for"
> > -- William Shedd
--
CRAK Software (Password Recovery Software)
Http://www.crak.com
joh### [at] crak com
602 863 9274 or 1 800 505 2725 In the USA
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"Ronald L. Parker" wrote:
> I've looked at it and it looks like it should be no problem to add,
> but I'll have to integrate it with wyzpov, which might be no small
> feat. BTW, your patch file seems to have some duplicated lines in
> express.c and a couple other places, unless I'm just not reading
> it right (which is quite possible)
Are my changes really that extesive, relatively speaking? I haven't
looked at the source to the dispersion patch but I'd guess there's some
kind of loop that traces rays of different wavelengths... and those
rays still obey the same rules.
Speaking of WyzPOV, I have a new version to send you which fixes some
major bugs.
--
Mike Paul
mbp### [at] locke ccil org
http://www.worldaxes.com/paul_fam
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Michael Paul wrote:
> Speaking of WyzPOV, I have a new version to send you which fixes some
> major bugs.
> --
>
> Mike Paul
> mbp### [at] locke ccil org
> http://www.worldaxes.com/paul_fam
Speaking again of WyzPOV the link on your home page is not responding -
http://wyzard.alignment.net/
--
Ken Tyler - 1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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On Sat, 11 Dec 1999 23:03:24 -0500, Michael Paul wrote:
>"Ronald L. Parker" wrote:
>
>> I've looked at it and it looks like it should be no problem to add,
>> but I'll have to integrate it with wyzpov, which might be no small
>> feat. BTW, your patch file seems to have some duplicated lines in
>> express.c and a couple other places, unless I'm just not reading
>> it right (which is quite possible)
>
>Are my changes really that extesive, relatively speaking?
No, probably not. It's just that the code got shuffled around a lot
when I tried to make your stuff work with 3.1a, so any other changes
to the same area would lead to lots of merge conflicts. In any case,
it looks like Nathan got it to work in MegaPOV, so it must not have
been as hard as I was telling myself it would be.
--
These are my opinions. I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html
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Ken wrote:
>
> Speaking again of WyzPOV the link on your home page is not responding -
>
> http://wyzard.alignment.net/
I know... the guy hosting it is having some problems with the phone
company. He told me it should be back up fairly soon.
--
Mike Paul
mbp### [at] locke ccil org
http://www.worldaxes.com/paul_fam
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Mike Paul wrote:
>
> Ken wrote:
> >
> > Speaking again of WyzPOV the link on your home page is not responding -
> >
> > http://wyzard.alignment.net/
>
> I know... the guy hosting it is having some problems with the phone
> company. He told me it should be back up fairly soon.
Thank you.
--
Wishing you Seasons Greetings, A Merry Christmas, and A Happy New Year !
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