POV-Ray : Newsgroups : povray.general : [ann] MMMM updated Server Time
6 Nov 2024 04:18:53 EST (-0500)
  [ann] MMMM updated (Message 1 to 6 of 6)  
From: ingo
Subject: [ann] MMMM updated
Date: 23 Oct 2002 09:08:35
Message: <Xns92B09ADD8A9D0seed7@povray.org>
Had some inspiration this morning so I added the possibility to write 
the generated mesh' to *.obj, *.pcm and arrays (*.arr). Please consider 
it as beta software, there may be some errors in the writing process.

The Meshmerizing Mesh Maker Macros can be found at:
http://members.home.nl/seedseven/

from revision.txt:

2002/10/23
makemesh.inc  : added the option to write Wavefront '*.obj'files,
                compressed mesh '*.pcm' files and '*.arr' files
                containing arrays for building a mesh2().
                Added CheckFileName(FileName) macro. This is also used
                by all other include files in the package.

param.inc &   : the texture for uv_mapping is now taken from the square
twovar.inc      <0,0>- <1,1> instead of from the rectangle
                <UVmin>-<UVmax>. This may break existing scenes :(

all inc files : checking wether or not to build a mesh or parse it from
                a file is now done via the CheckFileName() macro in
                makemesh.inc. 

2002/10/20
param.inc     : split the original Parametric() macro into two.
                Parametric() and Paramcalc(). The first is now a
                frontend to the latter. Paramcalc() does all the hard
                work. It can be used directly. This to make it possible
                to use macros instead of functions as the base for a
                parametric surface. 


Ingo


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From: ABX
Subject: Re: [ann] MMMM updated
Date: 23 Oct 2002 09:21:08
Message: <q98druo8vnnfaoi8e1fbsulc2cbcg8uqgj@4ax.com>
On 23 Oct 2002 09:08:35 -0400, ingo <ing### [at] tagpovrayorg> wrote:
> The Meshmerizing Mesh Maker Macros can be found at:
> http://members.home.nl/seedseven/

downloaded.

BTW: have you considered 'variable triangle spliting' ? I mean such splitting
of the quad with lower error in center of quad.

ABX


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From: ingo
Subject: Re: [ann] MMMM updated
Date: 23 Oct 2002 09:58:25
Message: <Xns92B0A35217A4seed7@povray.org>
in news:q98druo8vnnfaoi8e1fbsulc2cbcg8uqgj@4ax.com ABX wrote:

> BTW: have you considered 'variable triangle spliting' ? I mean such
> splitting of the quad with lower error in center of quad.
> 

No, do tou have any pointers? Google gave no result.

Ingo


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From: ABX
Subject: Re: [ann] MMMM updated
Date: 23 Oct 2002 10:22:14
Message: <jtbdru4ss2htn5e81bp3fc7s8dk7akfpva@4ax.com>
On 23 Oct 2002 09:58:25 -0400, ingo <ing### [at] tagpovrayorg> wrote:
> > BTW: have you considered 'variable triangle spliting' ? I mean such
> > splitting of the quad with lower error in center of quad.
> 
> No, do tou have any pointers? Google gave no result.

Nothing strange. Quoted term was from me. I just couldn't find best term for
it. Don't know if there is any.

http://news.povray.org/povray.binaries.images/22677/

ABX


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From: Shay
Subject: Re: [ann] MMMM updated
Date: 23 Oct 2002 11:00:14
Message: <3db6b97e@news.povray.org>
ABX <abx### [at] abxartpl> wrote in message
news:jtbdru4ss2htn5e81bp3fc7s8dk7akfpva@4ax.com...
> On 23 Oct 2002 09:58:25 -0400, ingo <ing### [at] tagpovrayorg> wrote:
> http://news.povray.org/povray.binaries.images/22677/
>
> ABX

That was only an example of a macro to find the normals of irregularly split
quads. The splits in that example were randomly generated. Here are some
examples of the real thing, some with wireframes. The first is
multi-resolution:

http://news.povray.org/povray.binaries.images/23830/
http://news.povray.org/povray.binaries.images/22750/
http://news.povray.org/povray.binaries.images/22740/
http://news.povray.org/povray.binaries.images/28213/

The method which I used to determine the optimal split was to find the
average of the four corner points and then select the dividing line which
was the least distance from that point. I'm not sure what the others did.

 -Shay


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From: ingo
Subject: Re: [ann] MMMM updated
Date: 23 Oct 2002 15:15:04
Message: <Xns92B0D9013878Eseed7@povray.org>
in news:3db6b97e@news.povray.org Shay wrote:

> The method which I used to determine the optimal split was to find
> the average of the four corner points and then select the dividing
> line which was the least distance from that point.

Thanks, I'll have a play with that idea. 

Ingo


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