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"Chris Huff" <chr### [at] mac com> wrote in message
news:chr### [at] povrayorg...
> In article <3b156c2e@news.povray.org>,
> "Rick [Kitty5]" <ric### [at] kitty5com> wrote:
>
> > Why a clone? Well it uses POV-Rays scene description language. Cheers to
> > Thomas for the heads up.
>
> It sounds like it's a completely different kind of renderer, sharing
> most of the SDL, but using other rendering and lighting methods(like
> "real" radiosity, not Monte-Carlo raytracing like POV uses). They also
> don't seem to know that POV itself will be rewritten soon...
Maybe this is a stupid question, but why doesn't Pov use real radiosity? Will
future versions have real radiosity as an option? It would be nice to have both
methods available IMHO. =)
Maybe the coding is too difficult, or copyrighted in a way that Pov couldn't use
it?
Nekar
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"Christoph Hormann" <chr### [at] gmxde> wrote in message
news:3B15F9CD.DB43743C@gmx.de...
>
>
> Peter Cracknell wrote:
> >
> > Any chance of someone hosting a Win32 executable of this - I have no
idea
> > what a tar.gz file is, but I assume it's something to do with
compiling....
> > it's just that I'd love a play with this and don't have the
software/skills
> > required to compile my own.
> >
>
> I had a quick look, the program uses gtk and therefore will not be
> compilable straight away with cygwin. There is a port of gtk for Windows
> so it should be possible.
>
> Christoph
>
> --
> Christoph Hormann <chr### [at] gmxde>
> IsoWood include, radiosity tutorial, TransSkin and other
> things on: http://www.schunter.etc.tu-bs.de/~chris/
Thanks for the replies but I still couldn't get it to work. I downloaded
the file zapped it in Winzip and ended up with a huge list of .h, .cpp,
.sub, .in, .am type files, but no binary. Aren't these C++ related files?
Sorry to appear so stupid I just wouldn't mind a play with this...
Peter Cracknell
--
http://www.petercracknell.com
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.255 / Virus Database: 128 - Release Date: 17/05/2001
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Nekar Xenos <j-p### [at] citywalkcoza> wrote in message
news:3b15fe70@news.povray.org...
>
> Maybe this is a stupid question, but why doesn't Pov use real radiosity?
Will
> future versions have real radiosity as an option? It would be nice to have
both
> methods available IMHO. =)
>
afaik 'Real' radiosity requires triangle meshes. That means for pov to
implement it, every object would need to be tesselated (Converted to
triangles). Easy enough for boxes, imagine tesselating a julia fractal
or a complex isosurface...
Gail
--
*************************************************************************
* gsh### [at] monotixcoza * Step into the abyss, *
* http://www.rucus.ru.ac.za/~gail/ * and let go. Babylon 5 *
*************************************************************************
* The difficult we do immediately, the impossible takes a little longer *
*************************************************************************
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Gail Shaw wrote:
>
> afaik 'Real' radiosity requires triangle meshes. That means for pov to
> implement it, every object would need to be tesselated (Converted to
> triangles). Easy enough for boxes, imagine tesselating a julia fractal
> or a complex isosurface...
>
Not to mention a sphere...
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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Christoph Hormann <chr### [at] gmxde> wrote in message
news:3B1605D5.B0C5D0A3@gmx.de...
>
>
> Gail Shaw wrote:
> >
> > afaik 'Real' radiosity requires triangle meshes. That means for pov to
> > implement it, every object would need to be tesselated (Converted to
> > triangles). Easy enough for boxes, imagine tesselating a julia fractal
> > or a complex isosurface...
> >
>
> Not to mention a sphere...
>
A reasonable approximation of a sphere isn't hard. A sphere's geometry
is well defined. The problem I can see with isos expecially is that they
don't
have a well defined geometry and can look like anything.
I don't even want to think about writing code to tesselate any isosurface.
Gail
--
*************************************************************************
* gsh### [at] monotixcoza * Step into the abyss, *
* http://www.rucus.ru.ac.za/~gail/ * and let go. Babylon 5 *
*************************************************************************
* The difficult we do immediately, the impossible takes a little longer *
*************************************************************************
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> IIRC, the POV License specifically forbids reuse of POV-Ray
> code, and specifically encourages re-use and implementation
> of POV-Ray SDL, though they reserve the right to change the
> language at any time.
It just struck me as odd that David Gemelli was concerned with the wording
of pov legal for his max to pov plugin, yet there are no problems
duplicating the scene description language.
--
Rick
Kitty5 WebDesign - http://Kitty5.com
Hi-Impact database driven web site design & e-commerce
TEL : +44 (01625) 266358 - FAX : +44 (01625) 611913 - ICQ : 15776037
POV-Ray News & Resources - http://Povray.co.uk
PGP Public Key
http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x231E1CEA
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In article <3b1609e6@news.povray.org> , "Gail Shaw" <gsh### [at] monotixcoza>
wrote:
> I don't even want to think about writing code to tesselate any isosurface.
It is possible with some approximation because the inside and outside of an
isosurface is defined (this works for other objects with this property,
too). However, a lot of triangles are necessary and the level of detail
will be far from a "real" isosurface.
Thorsten
____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde
Visit POV-Ray on the web: http://mac.povray.org
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In article <3b15fe70@news.povray.org> , "Nekar Xenos"
<j-p### [at] citywalkcoza> wrote:
> Maybe this is a stupid question, but why doesn't Pov use real radiosity?
There is no "real" radiosity, only different ways to do the same thing. In
fact the radiosity POV-Ray uses can be adapted to produce perfect results,
but this would require us to wait a billion years or more to see the final
image ...
> Will future versions have real radiosity as an option? It would be nice to
> have both methods available IMHO. =)
No, it is pointless to have the other algorithm in a raytracer in almost all
cases because it likely reduces (still) image quality due to tessellation.
In fact both methods approximate their results, while one approximates the
surfaces and contribution, the method used by POV-Ray approximates the
contribution only but in a less precise way than in the other method does.
> Maybe the coding is too difficult, or copyrighted in a way that Pov couldn't
> use it?
No, neither is the problem. It is simply that one method is more suitable
for a raytracer than the other method. There are programs out there that do
a very good job applying the "other" radiosity algorithm without raytracing.
Look for links to renderers in the POV-Ray links collection.
Thorsten
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In article <3b16012c@news.povray.org> , "Peter Cracknell" <pc### [at] lineonenet>
wrote:
> Thanks for the replies but I still couldn't get it to work. I downloaded
> the file zapped it in Winzip and ended up with a huge list of .h, .cpp,
> .sub, .in, .am type files, but no binary. Aren't these C++ related files?
> Sorry to appear so stupid I just wouldn't mind a play with this...
It is just a the source files to be compiled under Linux. No use on any
other platform.
Thorsten
____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde
Visit POV-Ray on the web: http://mac.povray.org
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Thorsten Froehlich wrote:
>
> It is just a the source files to be compiled under Linux. No use on any
> other platform.
I would rather say: this is just the source files. They
probably can compile only under Linux, and need work on
them before they can compile under Windows.
Cheers... :-)
--
Adrien Beau - adr### [at] freefr - http://adrien.beau@free.fr
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