Re: [Meshlab-devel] quadric filters

[Marco P. <pi...@gm...>]

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...> 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...> 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...> 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...> 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
>>>> 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
>>>>
>>>>
>>>
>>> -------------------------------------------------------------------------
>>> 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
>>>
>>>
>>
>