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Given all the artistic uses for povray, I thought the group might be
interested in the results of a scientific use. I've just uploaded a whole
bunch of POV rendered images into the Research Section of my web site. The
URL to the page that has the links to the images is attached to this
posting.
If you have a chance, I'd appreciate any comments you might have on the
information and its presentation. Note: the animations are rather large (1
to 5 MB) so expect a long download if you have a low bandwidth connection.
Enjoy!
Jim
Post a reply to this message
Attachments:
Download 'povray for science.url.txt' (1 KB)
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Jim Kress wrote:
>
> Given all the artistic uses for povray, I thought the group might be
> interested in the results of a scientific use. I've just uploaded a whole
> bunch of POV rendered images into the Research Section of my web site. The
> URL to the page that has the links to the images is attached to this
> posting.
>
> If you have a chance, I'd appreciate any comments you might have on the
> information and its presentation. Note: the animations are rather large (1
> to 5 MB) so expect a long download if you have a low bandwidth connection.
Um ... it might help if you gave us the URL.
--
Ross Smith ....................................... Auckland, New Zealand
<mailto:r-s### [at] ihug conz> ........ <http://crash.ihug.co.nz/~r-smith/>
"Oh boy! Violence! Can't wait! Hey, sex is everywhere, but good
violence is hard to find!" -- Michael Thompson
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Ross Smith <r-s### [at] ihugconz> writes:
> Jim Kress wrote:
> >
> > Given all the artistic uses for povray, I thought the group might be
> > interested in the results of a scientific use. I've just uploaded a whole
> > bunch of POV rendered images into the Research Section of my web site. The
> > URL to the page that has the links to the images is attached to this
> > posting.
> >
> > If you have a chance, I'd appreciate any comments you might have on the
> > information and its presentation. Note: the animations are rather large (1
> > to 5 MB) so expect a long download if you have a low bandwidth connection.
>
> Um ... it might help if you gave us the URL.
He has given the URL -- but uuencoded, which is IMO not very suited for
a ascii text. Anyway, here it is:
http://www.kressworks.com/Research/Quantum%20Chemistry/Unimolecular%20Decomposition%20Reactions/Amine%20oxides/N,N%20Dimethyl,%20N%20Ethyl%20Amine%20Oxide/N,N%20Dimethyl,%20N%20Ethyl%20Amine%20Oxide.html
Thomas
--
http://www.fmi.uni-konstanz.de/~willhalm
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Thomas Willhalm <Tho### [at] uni-konstanzde> wrote in article
<qqm### [at] goldachfmiuni-konstanzde>...
> Ross Smith <r-s### [at] ihugconz> writes:
>
> > Jim Kress wrote:
> > >
> > > Given all the artistic uses for povray, I thought the group might be
> > > interested in the results of a scientific use. I've just uploaded a
whole
> > > bunch of POV rendered images into the Research Section of my web
site. The
> > > URL to the page that has the links to the images is attached to this
> > > posting.
> > >
> > > If you have a chance, I'd appreciate any comments you might have on
the
> > > information and its presentation. Note: the animations are rather
large (1
> > > to 5 MB) so expect a long download if you have a low bandwidth
connection.
> >
> > Um ... it might help if you gave us the URL.
>
> He has given the URL -- but uuencoded, which is IMO not very suited for
> a ascii text. Anyway, here it is:
>
http://www.kressworks.com/Research/Quantum%20Chemistry/Unimolecular%20Decomp
osition%20Reactions/Amine%20oxides/N,N%20Dimethyl,%20N%20Ethyl%20Amine%20Oxi
de/N,N%20Dimethyl,%20N%20Ethyl%20Amine%20Oxide.html
>
I can't understand why he didn't just type it out into the message body.
;-)
--
Scott Hill
Sco### [at] DDLinkscouk
Software Engineer (and all round nice guy)
Company homepage : http://www.ddlinks.demon.co.uk
"The best trick the devil ever pulled was convincing people he didn't
exist..."
- Verbal Kint.
"the Internet is here so we can waste time talking about nothing in
particular when we should be working" - Marcus Hill.
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I've recently used POVRay to visualize a groundwater flow problem --
even created an animation of a fly-around. Very impressive tools. And
.FLC seems so much superior to .avi or .mpg for color fidelity.
Results are not not on the net right now. Sorry.... Anyone else doing
this kind of thing?
Tim Glover
tgl### [at] nettallycom
In response to:
> Jim Kress wrote:
>
> Given all the artistic uses for povray, I thought the group might be
> interested in the results of a scientific use. I've just uploaded a whole
> bunch of POV rendered images into the Research Section of my web
> site. The URL to the page that has the links to the images is attached to this
> posting.
>
> If you have a chance, I'd appreciate any comments you might have on
> the information and its presentation. Note: the animations are rather
> large (1 to 5 MB) so expect a long download if you have a low bandwidth
> connection.
>
Post a reply to this message
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I'm sorry for the difficulty with the URL. Using outlook express is a real
pain to send URLs. I've tried typing them into the text, sending them as
attachments, etc. It seems no matter what I try, somebody can't get it to
work.
Anybody got a reliable solution to this? I'd love to know one.
You could start at http://www.kressworks.com/Research/Quantum
Chemistry/Unimolecular Decomposition Reactions/ and then click on the N,N
diethyl link.
Please let me know if THIS works!
Thanks.
Jim
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Well, that didn't work either.
It's obvious that plain text mode breaks the URL at a space. So does HTML
mode. Than means it can't be typed in. So, please try this:
click on this link
http://www.kressworks.com/Research/
then, on the page that comes up, choose the Quantum Chemistry link
then, on the page that comes up, choose the Unimolecular Decomposition
Reactions link
then, on the page that comes up, choose the N,N dimethly, N ethyl ... link
I really appreciate anyone who goes through all this and give a comment.
Jim
Post a reply to this message
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Tim Glover heeft geschreven in bericht <35F### [at] nettallycom>...
>Anyone else doing this kind of thing?
I am a naval architect and tried some scientifically correct modelling of a
sea surface. Got stuck on strange patterns due to interference. It would be
very handy for such applications if POV supported something like an
isosurface.
Frans
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Jim Kress <jim### [at] dccmailcom> wrote in message
35f57bcd.0@news.povray.org...
>I'm sorry for the difficulty with the URL. Using outlook express is a real
>pain to send URLs. I've tried typing them into the text, sending them as
>attachments, etc. It seems no matter what I try, somebody can't get it to
>work.
>
>Anybody got a reliable solution to this? I'd love to know one.
I'm using Outlook Express and had no problem visiting the web site. I think
the better solution is to avoid the spaces in the url from the first place.
Substituting spaces with underscores "_" would make everyone happy I guess.
Aziz,,,
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"F.VERBAAS" <fve### [at] gironetnl> writes:
> Tim Glover heeft geschreven in bericht <35F### [at] nettallycom>...
> >Anyone else doing this kind of thing?
>
> I am a naval architect and tried some scientifically correct modelling of a
> sea surface. Got stuck on strange patterns due to interference. It would be
> very handy for such applications if POV supported something like an
> isosurface.
I guess that you don't know the "isosurface patch" for POV-Ray. Despite its
name it also handles parametric functions. I have encountered some minor
problems, but most of the time it does a good job. The URL is:
http://www.public.usit.net/rsuzuki/e/povray/iso/index.html
Executables for Windows and Macintosh are available. If needed I can
send you the binary file for a Sun Workstation.
Thomas
--
http://www.fmi.uni-konstanz.de/~willhalm
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Tim Glover <tgl### [at] nettallycom> writes:
>
> I've recently used POVRay to visualize a groundwater flow problem --
> even created an animation of a fly-around. Very impressive tools. And
> .FLC seems so much superior to .avi or .mpg for color fidelity.
>
> Results are not not on the net right now. Sorry.... Anyone else doing
> this kind of thing?
We participated in the contest A at the "Sixth Symposium on Graph Drawing"
in Montreal this year (http://gd98.cs.mcgill.ca/). We submitted an animation
that was rendered with POV-Ray -- and now share the first place with the
group from Tuebingen (also in Germany). We converted the single files to FLI,
AVI, and MPG. In my opinion the FLI is the nicest one. However, the file
size of the MPG is much smaller (and still 60 MB).
Thomas
--
http://www.fmi.uni-konstanz.de/~willhalm
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Jim Kress schrieb in Nachricht <35f57bcd.0@news.povray.org>...
>I'm sorry for the difficulty with the URL. Using outlook express is a real
>pain to send URLs. I've tried typing them into the text, sending them as
>attachments, etc. It seems no matter what I try, somebody can't get it to
>work.
>
>Anybody got a reliable solution to this? I'd love to know one.
>
>You could start at http://www.kressworks.com/Research/Quantum
>Chemistry/Unimolecular Decomposition Reactions/ and then click on the N,N
>diethyl link.
>
>Please let me know if THIS works!
>
>Thanks.
>
>Jim
It's completely uncommon to have whitespaces in WWW-adresses, so try to
avoid that!
If you do, please mention that when you type an adress in e-mails, so people
can copy a string as
"http://www.kressworks.com/Research/Quantum Chemistry/Unimolecular
Decomposition Reactions/"
right into the Browser-window.
But at last, you _should_ replace your web-adresses with names that don't
contain whitespaces. use - (minus) or _ (underscore) instead!
And then, no, Outlook doesn't (normaly) have any problems with URLS in the
text. I think, when it does have problems, any other e-mail program will
have, too. Just be conform to internet-standards (which means here: DONT USE
WHITESPACES).
greetings,
Mathias
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Congrats on your first place! I agree .mpg files are smaller (in my
case about 1.5 mbytes vs. 4.5 mbytes) but the colors were dithered
(poorly so, if I may add) and the overall effect was disappointing.
FLI/FLC (with the free Autodesk viewer, no less!) preserves the color
scheme adequately w/o dithering - and looks good even in full screen
640X480 format.
I guess, like .jpg, you get only the quality out that you're willing to
pay for with file size.
Tim G.
tgl### [at] nettallycom
Thomas Willhalm wrote:
>
> Tim Glover <tgl### [at] nettallycom> writes:
> >
> > I've recently used POVRay to visualize a groundwater flow problem --
> > even created an animation of a fly-around. Very impressive tools. And
> > .FLC seems so much superior to .avi or .mpg for color fidelity.
> >
> > Results are not not on the net right now. Sorry.... Anyone else doing
> > this kind of thing?
>
> We participated in the contest A at the "Sixth Symposium on Graph Drawing"
> in Montreal this year (http://gd98.cs.mcgill.ca/). We submitted an animation
> that was rendered with POV-Ray -- and now share the first place with the
> group from Tuebingen (also in Germany). We converted the single files to FLI,
> AVI, and MPG. In my opinion the FLI is the nicest one. However, the file
> size of the MPG is much smaller (and still 60 MB).
>
> Thomas
>
> --
> http://www.fmi.uni-konstanz.de/~willhalm
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Thanks for the info!
The white spaces come from the long file name capability in Win NT and Win
95/98. Since, for local access on my Intranet I have had no problems with
these URLs, I didn't realize that over the Internet URL standards were not
kept up to date with evolving operating systems.
I'll have to decide if the (large!) amount of re-work on my site will have
to be done in light of this URL limitation.
Jim
<large SNIP! - just for you, Johannes :) >
>
>It's completely uncommon to have whitespaces in WWW-adresses, so try to
>avoid that!
>If you do, please mention that when you type an adress in e-mails, so
people
>can copy a string as
>"http://www.kressworks.com/Research/Quantum Chemistry/Unimolecular
>Decomposition Reactions/"
>right into the Browser-window.
>But at last, you _should_ replace your web-adresses with names that don't
>contain whitespaces. use - (minus) or _ (underscore) instead!
>
>And then, no, Outlook doesn't (normaly) have any problems with URLS in the
>text. I think, when it does have problems, any other e-mail program will
>have, too. Just be conform to internet-standards (which means here: DONT
USE
>WHITESPACES).
>
>greetings,
>Mathias
>
>
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Tim Glover <tgl### [at] nettallycom> writes:
> Congrats on your first place!
Thanks a lot.
> I agree .mpg files are smaller (in my
> case about 1.5 mbytes vs. 4.5 mbytes) but the colors were dithered
> (poorly so, if I may add) and the overall effect was disappointing.
> FLI/FLC (with the free Autodesk viewer, no less!) preserves the color
> scheme adequately w/o dithering - and looks good even in full screen
> 640X480 format.
Since we're using a Unix system, xanim and mpeg_play are our choice.
As far as I know mpegs are true color animations. The distortion that
you are referring to is due to the compression algorithm.
> I guess, like .jpg, you get only the quality out that you're willing to
> pay for with file size.
Unfortunately, we will have to pay the prize, because 200 MB is really to
much for a web page in these days.
Thomas
--
http://www.fmi.uni-konstanz.de/~willhalm
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Jim Kress <jim### [at] dccmailcom> wrote:
: I didn't realize that over the Internet URL standards were not
: kept up to date with evolving operating systems.
UNIX has had long filenames (with spaces, lower/uppercase letters, etc)
decades before NT was born.
NT maybe evolving, but it's decades late in almost everything.
--
- Warp. -
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Nieminen Mika <war### [at] assaricctutfi> wrote in message
35f7f812.0@news.povray.org...
>Jim Kress <jim### [at] dccmailcom> wrote:
>: I didn't realize that over the Internet URL standards were not
>: kept up to date with evolving operating systems.
>
> UNIX has had long filenames (with spaces, lower/uppercase letters, etc)
>decades before NT was born.
> NT maybe evolving, but it's decades late in almost everything.
If I may add: These standards were made to avoid compatibility problems
(such as the one we're talking about) and to promote platform-independence.
Not all operating systems support white-spaces in their filesystems.
Plus, white-space is usually used as a delimiter. For example: say you have
a program that accepts multiple URLs from the command prompt:
getpages http://www.yahoo.com/ http://www.povray.org/
http://www.irtc.org/
How would one be able to use such a program if one of these URLs contained a
white-space?
Anyways, HTTP Servers should conform to the standards, not the other way
around. I, personally, would neven bother installing a web server that is
not HTTP compliant.
Aziz,,,
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Abdulaziz Ghuloum wrote in message <35f81203.0@news.povray.org>...
>How would one be able to use such a program if one of these URLs contained
a
>white-space?
> Anyways, HTTP Servers should conform to the standards, not the other
way
>around. I, personally, would neven bother installing a web server that is
>not HTTP compliant.
Actually, URL *can* contain whitespace: The official MIME format called
"x-www-form-urlencoded" allows for *all* characters, which are encoded like
this:
The alphanumerics stay as they are, space is converted to "+" and everything
else is converted to "%xx", where "xx" is the ascii-value of the character
in two-digit hex-code.
So an URL with a space would simply look like this for example:
http://www.example.com/url+with+whitespace.html
Even the http://www.example.com/url%20with%20whitespace.html version should
work, since I would not expect an URL decoder to not allow "%20" simply
because it *should* be coded with "+" instead.
So the problem could actually not be the server, but the browser, who
doesn't convert the URL to the MIME format...
Bye,
Johannes.
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>Congrats on your first place! I agree .mpg files are smaller (in my
>case about 1.5 mbytes vs. 4.5 mbytes) but the colors were dithered
>(poorly so, if I may add) and the overall effect was disappointing.
>FLI/FLC (with the free Autodesk viewer, no less!) preserves the color
>scheme adequately w/o dithering - and looks good even in full screen
>640X480 format.
hm...
Sounds as if you are viewing the mpegs on an old 256 color display?
The dithering is due to your mpeg-display-software/hardware, not due to the
mpeg-file itself.
Mpegs are ALWAYS true-color. if your display/software doesnt find true-color
capabilities, it will dither down the video to 256 color in real-time. This
will result in poor quality. FLICS are ALWAYS only 256 colors. Colors are
dithered down at creation time (compile time?). When there is enough time,
you can get very pretty results with 256 color images. So on poor hardware
(or poor mpeg-software) a FLIC may look better, but on not too old hardware
you get really good video-quality with mpeg, even with small file-sizes (I
have a two-years old pentium 133, which gives me really good mpeg-videos
with the ms-active-movie player, running full screen, nice and smooth
interpolated realtime to 1024-screen size, no extra-hardware, 16-bit
video-resolution, its near to video-recorder-quality).
When i use a software as Graphics-Workshop, then this software will dither
down to 256 colors- thats really worse than 256-color flics with the same
software.
greetings,
Mathias
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Mathias Bachmann wrote:
>
<snip>
> When i use a software as Graphics-Workshop, then this software will dither
> down to 256 colors- thats really worse than 256-color flics with the same
> software.
I think this was the actual problem. My apologies to MPEG.
Tim G.
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