[Paraview] 3D contour smoothness

[Cory Quammen]

Philipp,

I apologize, but I haven't had time to look more into this problem.
I'll have another look soon.

Thanks,
Cory

On Wed, Oct 8, 2014 at 3:11 AM, Philipp E <pspeachum at gmail.com> wrote:
> Hi Cory,
>
> can you report any updates for this issue?
>
> Best regards and thanks for your efforts
> Philipp
>
> On 09/19/2014 07:17 PM, Cory Quammen wrote:
>> Just a little more info on this. The problem starts with 3.98.
>>
>> On Fri, Sep 19, 2014 at 12:08 PM, Philipp E. <pspeachum at gmail.com> wrote:
>>> Sorry Cory,
>>>
>>> you are right. The cell number is the same.
>>>
>>> Regards
>>> Philipp
>>>
>>>
>>> Am 19.09.2014 um 17:46 schrieb 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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>