[Paraview] 3D contour smoothness

[Cory Quammen]

Philipp,

I can confirm what you see with a pre 4.2 version of ParaView.
However, the number of produced cells is the same.

I will try to track down why this changed.

Thanks,
Cory

On Fri, Sep 19, 2014 at 11:17 AM, Philipp E <pspeachum at gmail.com> wrote:
> Hi Cory
>
> I managed to compress the data set to a fair size and attached it to
> this mail. The data set is pressure, contour value is 0.55.
>
> By looking again at the data (contour -> information), I just found that
> the old version (3.14.1) uses 148432 cells , while the the new one
> employs 75232 cells. Hope that helps.
>
> Kind regards
> Philipp
>
> Errata: I meant 4.2.0RC1 in the previous mails.
>
> On 09/19/2014 04:59 PM, Cory Quammen wrote:
>> Phillipp,
>>
>> Do you have a data set similar to the one you've shown that you can share?
>>
>> Thanks,
>> Cory
>>
>> On Fri, Sep 19, 2014 at 10:48 AM, Philipp E <pspeachum at gmail.com> wrote:
>>> Hi Cory,
>>>
>>> thank you for your fast feedback.
>>>
>>> a) Compute normal is checked. (Without normals, the contour is
>>> completely stepped)
>>> b) Contour values are the same.
>>>
>>> Regards
>>> Philipp
>>>
>>> On 09/19/2014 04:40 PM, Cory Quammen wrote:
>>>> Philipp,
>>>>
>>>> In the contour filter, is the option "Compute Normals" checked in 4.0 RC1?
>>>>
>>>> Also, are the contour values the same between the two versions?
>>>>
>>>> Thanks,
>>>> Cory
>>>>
>>>> On Fri, Sep 19, 2014 at 10:25 AM, Philipp E <pspeachum at gmail.com> wrote:
>>>>> Hello everyone,
>>>>>
>>>>> after extensive search I was desperate enough to post on this list:
>>>>>
>>>>> It appears that the surface smoothing algorithm of the contour filter
>>>>> does not work as "aggressive" as in older version (3.14.1 was the last
>>>>> one we found to do so). As an example I prepared this two screenshots,
>>>>> VTK data are scalars on a structured grid (200x100x100), legacy format.
>>>>> (An additional call of the "smooth" filter does not help.)
>>>>>
>>>>> 3.14.1
>>>>> http://s7.directupload.net/images/140919/euadfvko.png
>>>>> 4.0.RC1
>>>>> http://s14.directupload.net/images/140919/84y689mi.png
>>>>>
>>>>> Both versions are running with the shipped settings. Since the effect
>>>>> could be reproduced on several workstations, we are wondering whether
>>>>> there has been an (undocumented?) change in the filter mechanism or some
>>>>> option we/setting/data problem we are not aware of.
>>>>>
>>>>> Kind regards and thanks in advance
>>>>> Philipp Engels.
>>>>>
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