Hi all,

I'm using UNIX or ATARI platforms, and beta 3.5 are not yet released.
I must precise that I compiled 3.1g unofficial version for ATARI, and
that it is available on my home page. I used a modified version of 3.1g

a 2D Graph Describer, and 3D modeller of explicit mathematical surfaces.
In my software, I export scripts from 3.1 version of POVRAY as you can
see on "http://eureka.atari.org/vrml" link. It seems that POVRAY 3.5
has a completely new manner to handle 3D explicit surfaces. I used to
define a "mesh" containing an explicit formula of the explicit surface,
and describing the vertex and it's normals, computed from the surface's
definition. That produced a really long parsing, due to the definition
of
macros for the points, and the normals.
As I suspect, the explicit formula of 3D surfaces is now sufficient to
define a 3D shape. Am I wrong ? If not, I would really appreciate to
read the 3.5 documentation about that topic. Is there any online
documentation available on the WEB ? I really look forward to read it.

Thanks for your help,

Best regards,


http://eureka.atari.org
mailto:lec### [at] atariorg

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Francois Le_Coat/mailaxis wrote:

> As I suspect, the explicit formula of 3D surfaces is now sufficient to
> define a 3D shape. Am I wrong ? If not, I would really appreciate to
> read the 3.5 documentation about that topic. Is there any online
> documentation available on the WEB ? I really look forward to read it.

The POV-Ray v3.5 documentation will not be released into a single download
format until the beta rounds are over. The documentation is changing quite
frequently at this time and the POV-Team will not release single copies of
it, as a seperate download, until the docs have been finalized.

-- 
Ken Tyler - POV-Ray Technical Assistance Group

Post a reply to this message

in news:3BA2097E.D0AB65A1@ief.u-psud.fr Francois Le_Coat/mailaxis
wrote: 

>  I used to
> define a "mesh" containing an explicit formula of the explicit
> surface, and describing the vertex and it's normals, computed from
> the surface's definition. That produced a really long parsing, due
> to the definition of
> macros for the points, and the normals.
> As I suspect, the explicit formula of 3D surfaces is now sufficient
> to define a 3D shape.

 POV-Ray 3.5 has the parametric{} object, that directly renders the 
formula. But it can be very slow in its current state.
 Incidentally I have yesterday posted a macro that may be of interest 
for you, as it calulates the mesh a lot faster than the output of your 
program does. It uses mesh2 and function, both new in 3.5, see:

Newsgroups: povray.binaries.scene-files
Subject: Re: param.inc
From: ingo <ing### [at] homenl>
Message-ID: <Xns### [at] povrayorg>
Date: 14 Sep 2001 04:31:21 -0400
Xref: news.povray.org povray.binaries.scene-files:2438


Ingo

-- 
Photography: http://members.home.nl/ingoogni/
Pov-Ray    : http://members.home.nl/seed7/

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In article <3BA20CA8.DD86D21C@pacbell.net> , Ken <tyl### [at] pacbellnet>  
wrote:

>> As I suspect, the explicit formula of 3D surfaces is now sufficient to
>> define a 3D shape. Am I wrong ? If not, I would really appreciate to
>> read the 3.5 documentation about that topic. Is there any online
>> documentation available on the WEB ? I really look forward to read it.
>
> The POV-Ray v3.5 documentation will not be released into a single download
> format until the beta rounds are over. The documentation is changing quite
> frequently at this time and the POV-Team will not release single copies of
> it, as a seperate download, until the docs have been finalized.

While Ken is absolutely correct with this, you can view it it online at
<http://www.povray.org/working-docs/>


    Thorsten


____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

Post a reply to this message

Hi,

Thank you ! That's a really interesting piece of script. I may use

agree ? Anyway, do you think that it may also work with MegaPov 0.7 ?
In this case, waiting for Povray 3.5 UNIX/Linux code release, I
may compile MegaPov for my ATARI (I'm on the way), and test your
scripts. Meanwhile I realized that MegaPov 0.7 parametric surfaces
are really slow to render, and very fast to parse. It's the exact

great miss from MegaPov 0.7, and Povray 3.5 (I suspect), that there's
no cylindrical or spherical coordinates. It seems to be possible
to do with your proper script. So thanks again !

Regards,



http://eureka.atari.org
mailto:lec### [at] atariorg

ingo wrote:
> 
> in news:3BA2097E.D0AB65A1@ief.u-psud.fr Francois Le_Coat/mailaxis
> wrote:
> 
> >  I used to
> > define a "mesh" containing an explicit formula of the explicit
> > surface, and describing the vertex and it's normals, computed from
> > the surface's definition. That produced a really long parsing, due
> > to the definition of
> > macros for the points, and the normals.
> > As I suspect, the explicit formula of 3D surfaces is now sufficient
> > to define a 3D shape.
> 
>  POV-Ray 3.5 has the parametric{} object, that directly renders the
> formula. But it can be very slow in its current state.
>  Incidentally I have yesterday posted a macro that may be of interest
> for you, as it calulates the mesh a lot faster than the output of your
> program does. It uses mesh2 and function, both new in 3.5, see:
> 
> Newsgroups: povray.binaries.scene-files
> Subject: Re: param.inc
> From: ingo <ing### [at] homenl>
> Message-ID: <Xns### [at] povrayorg>
> Date: 14 Sep 2001 04:31:21 -0400
> Xref: news.povray.org povray.binaries.scene-files:2438

Post a reply to this message

Hi Thorsten,

That's a very useful link. We won't have a Povray code release soon, but
we can have a preview of the features now. That's very kind of you.

Best Regards,



http://eureka.atari.org
mailto:lec### [at] atariorg

Thorsten Froehlich wrote:
> While Ken is absolutely correct with this, you can view it it online at
> <http://www.povray.org/working-docs/>
> 
>     Thorsten
> 
> ____________________________________________________
> Thorsten Froehlich
> e-mail: mac### [at] povrayorg
> 
> I am a member of the POV-Ray Team.
> Visit POV-Ray on the web: http://mac.povray.org

Post a reply to this message

in news:3BA604C4.55D6A689@ief.u-psud.fr Francois Le_Coat/mailaxis 
wrote:

> Thank you ! That's a really interesting piece of script. I may use

> agree ? 

Yes, go ahead.

>Anyway, do you think that it may also work with MegaPov 0.7 ?

You probably have to make a few changes then:
The RangeMM function has to changed into a macro.
If you use macros to build the functions it should work
If you use MegaPov functions you'll probably have to change a few 
things.



Ingo

-- 
Photography: http://members.home.nl/ingoogni/
Pov-Ray    : http://members.home.nl/seed7/

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