Re: [Meshlab-devel] quadric filters
A processing system for 3D triangular meshes
Brought to you by:
cignoni,
granzuglia
Menu
▾
▴
Re: [Meshlab-devel] quadric filters
|
From: skunkwerk <sku...@gm...> - 2008-07-20 16:52:46
|
thanks paolo,
i tried it again and the results look much better... though still
slightly worse performance than the regular quadric. i'll do some more
testing.
imran
On Wed, Jul 16, 2008 at 11:27 PM, Paolo Cignoni <pao...@is...>
wrote:
> Thanks Marco!
>
> We did it at the same time. :)
>
> Yes it was rather simple.
> There was a couple a small bugs that i have found when looking in the code,
>
> borders were not computed correctly (you used ff topo instead of VF topo)
> (and i did something wrong when restoring the border preserving markings)
>
> So let me commit my version later.
>
> p.
>
>
>
> Marco Pirosu wrote:
>
> so i actually implemented it.
>
> Then i think i just did copy and paste from the regular one, because i
> do not remember doing anything special.
>
> I don't know why their outcome differs so much.
>
> On 7/16/08, skunkwerk <sku...@gm...> <sku...@gm...> wrote:
>
>
> thanks Marco,
> Paolo, is this feature something we could ask Marco to implement? I
> re-did my tests, restarting meshlab each time so as not to be affected by
> the bug you mentioned. the 'preserve boundary' option does seem to work,
> but even without it selected the regular quadric preserves much more of the
> boundary than the quadric-with-texture does.
>
> i'm working on fixing the filter texture (texture atlas) plugin right now
>
> imran
>
> On Wed, Jul 16, 2008 at 1:55 PM, Marco Pirosu <pi...@gm...> <pi...@gm...> wrote:
>
>
>
> the original quadric algorithm has been written by paolo cignoni. I
> think to remember i did not manage it because it wasn't part of the
> course project, even if the option is there (i think it has been put
> there in order to be uniform with the normal one). Also, if i remember
> well. the two algotithms work in a different way. The regular one is
> dedicated for 3D geometry, while my algorithm is based on the Garland
> multidimensional algorithm.
>
>
> On 7/16/08, skunkwerk <sku...@gm...> <sku...@gm...> wrote:
>
>
> it looks like the extra options in the regular quadric filter make no
> visible difference (i tried reductions with them on and off) -
> especially
> the 'preserve boundaries' option that I thought would account for the
> different performance.
>
> but sure enough, the regular-quadric is performing better (dropping less
> geometry for the same number of output faces) than the quadric-texture
> filter. any ideas why?
>
> imran
>
> On Wed, Jul 16, 2008 at 9:55 AM, skunkwerk <sku...@gm...> <sku...@gm...> wrote:
>
>
>
> is that the source of the problem, you think?
> who wrote the regular quadric filter?
> would it be possible to copy-paste the code from the regular quadric
> filter
> that handles boundary preservation to the quadric-texture one?
>
> imran
>
>
> On Wed, Jul 16, 2008 at 4:19 AM, Marco Pirosu <pi...@gm...> <pi...@gm...> wrote:
>
>
>
> i think it wasn't part of the course project, so i didn't implement
> it.
> It
> should be doable, through.
>
> On 7/16/08, skunkwerk <sku...@gm...> <sku...@gm...> wrote:
>
>
>
> there seems to be a difference in the performance of the
> quadric-with-texture filter and the regular quadric.
>
> see these two files:www.akbars.net/classicford.saved.dae (regular quadric)www.akbars.net/classicford.savedtextured.dae (quadric-with-texture)
>
> the quadric-with-texture file has polygons missing from the wheels,
> if
> you look at them from the side. is this supposed to happen? they
>
>
> were
>
>
> both
> reduced to about ~50,000 polygons.
>
> Is there a reason the quadric-with-texture filter doesn't have a
> "preserve boundary" option?
>
> thanks,
> imran
>
>
>
>
>
> -------------------------------------------------------------------------
>
>
> This SF.Net email is sponsored by the Moblin Your Move Developer's
> challenge
> Build the coolest Linux based applications with Moblin SDK & win
> great
> prizes
> Grand prize is a trip for two to an Open Source event anywhere in the
> worldhttp://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Meshlab-devel mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/meshlab-devel
>
>
> -------------------------------------------------------------------------
>
>
> This SF.Net email is sponsored by the Moblin Your Move Developer's
> challenge
> Build the coolest Linux based applications with Moblin SDK & win great
> prizes
> Grand prize is a trip for two to an Open Source event anywhere in the
> worldhttp://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Meshlab-devel mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/meshlab-devel
>
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's
> challenge
> Build the coolest Linux based applications with Moblin SDK & win great
> prizes
> Grand prize is a trip for two to an Open Source event anywhere in the
> worldhttp://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Meshlab-devel mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/meshlab-devel
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great prizes
> Grand prize is a trip for two to an Open Source event anywhere in the worldhttp://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Meshlab-devel mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/meshlab-devel
>
>
>
> --
> Paolo Cignoni -- Senior Researcher
> Visual Computing Laboratory - ISTI - CNR http://vcg.isti.cnr.it/~cignoni <http://vcg.isti.cnr.it/%7Ecignoni>
>
> ISTI - CNR
> Via Moruzzi 1,
> 56124 Pisa
> ITALY
>
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's
> challenge
> Build the coolest Linux based applications with Moblin SDK & win great
> prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> _______________________________________________
> Meshlab-devel mailing list
> Mes...@li...
> https://lists.sourceforge.net/lists/listinfo/meshlab-devel
>
>
|
