[Paraview] [EXTERNAL] NaN coloring on non-NaN component

[Ibanez, Daniel Alejandro]

Cory,

Please let us know when the better handling of zero variation
is available in a ParaView release, I'll be pretty happy about that.
The epsilon thing has bugged me for a while now, although I
can keep working with it.

Thanks,
Dan
________________________________________
From: Cory Quammen <cory.quammen at kitware.com>
Sent: Tuesday, April 11, 2017 8:48 AM
To: Bauer, Andy (External Contacts)
Cc: Ibanez, Daniel Alejandro; Granzow, Brian N (External Contacts); paraview at paraview.org
Subject: Re: [Paraview] [EXTERNAL] NaN coloring on non-NaN component

Andy,

Yes, that's the expected behavior for now in 5.3. That's because we
are adding an epsilon to the maximum in this case to avoid
division-by-zero error in the color mapping math.

Soon, ParaView will set the lookup table range so that the min and max
are the same and handle the division-by-zero issue better. The color
legend will also show the min and max as the same value in this case.

Thanks,
Cory

On Tue, Apr 11, 2017 at 10:43 AM, Andy Bauer <andy.bauer at kitware.com> wrote:
> Hi Cory,
>
> What's the behavior supposed to be in PV 5.3 when pseudo-coloring by a
> variable which has 0 variation? When I look at this in PV 5.3 the lookup
> table range goes from 0 to 3.4e38. Is that what it's supposed to be?
>
> Thanks,
> Andy
>
> On Tue, Apr 11, 2017 at 10:39 AM, Cory Quammen <cory.quammen at kitware.com>
> wrote:
>>
>> Hi Dan,
>>
>> I believe you are encountering this bug in 5.2:
>> https://gitlab.kitware.com/paraview/paraview/issues/17127
>>
>> It has been fixed in ParaView 5.3.0 and I verified that it works with
>> the dataset you provided.
>>
>> Best regards,
>> Cory
>>
>> On Tue, Apr 11, 2017 at 10:30 AM, Ibanez, Daniel Alejandro
>> <daibane at sandia.gov> wrote:
>> > Installing the ParaView 5.0.1 binary made this go away.
>> >
>> > ________________________________
>> > From: ParaView <paraview-bounces at paraview.org> on behalf of Ibanez,
>> > Daniel
>> > Alejandro <daibane at sandia.gov>
>> > Sent: Tuesday, April 11, 2017 8:15 AM
>> > To: paraview at paraview.org
>> > Cc: Granzow, Brian N (External Contacts)
>> > Subject: [EXTERNAL] [Paraview] NaN coloring on non-NaN component
>> >
>> >
>> > Hello,
>> >
>> >
>> > I'm using the ParaView 5.2.0 binary download for Mac.
>> >
>> > I've attached an unstructured grid VTK file, using binary encoding.
>> >
>> > When I open this file, and try to color by the Y component
>> >
>> > of nodal velocity, I get the NaN color.
>> >
>> > I've checked the data right before it goes into the file
>> >
>> > and am pretty certain there are no NaN or infinity values
>> >
>> > (by std::isnan, std::isinf, and writing to std::cerr in C++).
>> >
>> >
>> > Could someone take a look at this and confirm whether
>> >
>> > its a bug or something is actually wrong with my data ?
>> >
>> >
>> > Much appreciated,
>> >
>> >
>> > Dan Ibanez
>> >
>> >
>> > _______________________________________________
>> > Powered by www.kitware.com
>> >
>> > Visit other Kitware open-source projects at
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>> >
>> > Please keep messages on-topic and check the ParaView Wiki at:
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>> >
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>> >
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>> >
>>
>>
>>
>> --
>> Cory Quammen
>> Staff R&D Engineer
>> Kitware, Inc.
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the ParaView Wiki at:
>> http://paraview.org/Wiki/ParaView
>>
>> Search the list archives at: http://markmail.org/search/?q=ParaView
>>
>> Follow this link to subscribe/unsubscribe:
>> http://public.kitware.com/mailman/listinfo/paraview
>
>



--
Cory Quammen
Staff R&D Engineer
Kitware, Inc.