[Paraview] Bug in Color Scale
Takuya OSHIMA
oshima at eng.niigata-u.ac.jp
Tue Dec 2 09:19:40 EST 2008
I appreciate your response. I have just sent a query about the values
repoted in the Information panel to the user. Meanwhile I skimmed
through pqPipelineRepresentation and its relevant classes but haven't
found anything suspicious so far.
Takuya OSHIMA, Ph.D.
Faculty of Engineering, Niigata University
8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN
From: "Moreland, Kenneth" <kmorel at sandia.gov>
Subject: Re: [Paraview] Bug in Color Scale
Date: Mon, 1 Dec 2008 15:44:31 -0700
> I’m running out of things to suggest. The only problem I can think of (and
> this is a stretch) is that somewhere the range in the data array is being
> incorrectly set either by some rouge call to the information object or because
> the data in the array changes without the vtkDataArray object being aware of
> it. Does anyone else have any ideas? Berk? Utkarsh?
>
> What range of values is reported in the Information panel? Is it giving the
> correct range, or the range used in the color scale?
>
> -Ken
>
> On 11/28/08 7:46 AM, "Takuya OSHIMA" <oshima at eng.niigata-u.ac.jp> wrote:
>
> Hi Shi, Ken, and all,
>
> A user of my reader reported exactly the same problem about the auto
> scaling on ParaView 3.5.0. He told me that after applying Rescale to
> Data Range to scalar attributes the range is always set to [0, 1],
> even though the data actually has a range of e.g. [87200, 87250].
>
> He also provided me with one of the datasets that caused the problem
> but so far I am not able to reproduce the problem (tested with the CVS
> head on Windows and Linux 32bit). I kind of suspected an uninitialized
> variable somewhere and tried a valgrind test but it didn't tell me
> anything meaningful either.
>
> Hence, I'm interested in under what exact condition this problem would
> occur...? Did anyone else encounter the problem, and if so, is it 100%
> reproducible?
>
> Takuya OSHIMA, Ph.D.
> Faculty of Engineering, Niigata University
> 8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN
>
> From: Shi Jin <jinzishuai at yahoo.com>
> Subject: Re: [Paraview] Bug in Color Scale
> Date: Tue, 25 Nov 2008 12:36:55 -0800 (PST)
>
> > Thank you Ken.
> > This is really strange then. I just downloaded the 32-bit version for
> Linux
> > and had the same problems. It sounds like a problem of my linux box.
> >
> > By the way, I did change the color map to HSV earlier but I am sure I
> didn't
> > change anything else. And the new 32bit binary, I didn't do anything to
> it and
> > still get the [0,1] range. I guess I have to use some other machines to
> see
> > the problems.
> >
> > Thank you for your quick response and I will keep you updated on my
> findings.
> >
> > Shi
> >
> > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
> ━━━
> > From: "Moreland, Kenneth" <kmorel at sandia.gov>
> > To: Shi Jin <jinzishuai at yahoo.com>; "paraview at paraview.org"
> > <paraview at paraview.org>
> > Sent: Tuesday, November 25, 2008 12:27:47 PM
> > Subject: Re: [Paraview] Bug in Color Scale
> >
> > Nope. I still can’t replicate the problem. I downloaded the binary
> you
> > specify, loaded the data set you sent, and it set the range fine.
> >
> > I notice from the image you sent that the color bar does not have the
> default
> > colors. Are you sure that you are actually using the version of
> ParaView you
> > downloaded as opposed to another version that might be in your path?
> Earlier
> > versions of ParaView used that rainbow scalar bar as a default. Either
> that
> > or you have been playing with color scale editor dialog box. In that
> case,
> > you may have accidently changed the range without realizing it.
> >
> > -Ken
> >
> > On 11/25/08 9:35 AM, "Shi Jin" <jinzishuai at yahoo.com> wrote:
> >
> > Hi Ken,
> >
> > Thank you. I have attached my sample data file and a screenshot
> taken
> > under paraview-3.4.0 under 64bit Linux.
> > Just now I tried the Windows version and it seems to be working
> fine. So I
> > guess this is a problem only found in the Linux version. By looking
> at the
> > range for the variable Rank in the information panel, we can see it
> is
> > [3,3] however the color displays only for range [0,1].
> > Please let me know if you can reproduce this problem on Linux. The
> binary
> > I used is paraview-3.4.0-Linux-x86_64.
> >
> > Thanks a lot.
> > Shi
> >
> > ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
> ━━━
> > From: "Moreland, Kenneth" <kmorel at sandia.gov>
> > To: Shi Jin <jinzishuai at yahoo.com>; "paraview at paraview.org" <
> > paraview at paraview.org>
> > Sent: Tuesday, November 25, 2008 7:50:42 AM
> > Subject: Re: [Paraview] Bug in Color Scale
> >
> > Re: [Paraview] Bug in Color Scale Shi,
> >
> > I have not run into this, nor have I heard of anyone else who has.
> Could
> > you tell us more about your data or, better yet, send us an example?
> >
> > One thing that has changed with the rescale range feature recently
> is that
> > the range is now computed based on the values that appear throughout
> an
> > entire volume, not just what appears on the surface. Thus, if you
> are
> > rendering a volume of data with 1 in the middle but with the surface
> only
> > having up to 0.01, the range is still going to be up to 1. Check
> the
> > ranges in the Information panel. The scalar bar range should agree
> with
> > that. If you don’t know where the upper values are located, try
> using the
> > threshold filter to find them.
> >
> > -Ken
> >
> > On 11/24/08 8:24 PM, "Shi Jin" <jinzishuai at yahoo.com> wrote:
> >
> > Hi there,
> >
> > I just upgraded my paraview from 3.10 to 3.40. Immediately I
> found
> > that the same data was not colored correctly with the new
> version. It
> > turned out that in the Display Tab, Rescale to Data Range button
> > actually does nothing. If I clicked on Edit Color Map.., I found
> that
> > the maximum of data range is always 1 (minimum always 0), no
> matter
> > what the real range is. I can of course uncheck Automatically
> Rescale
> > to Fit Data Range, and set the range using Rescale Range button
> by
> > hand. However, I think this is not what it is supposed to be. I
> tried
> > both the Linux-64bit binary found online and my own build on an
> ubuntu
> > box and they have the same problem. Please let me know if it is
> > indeed a bug or just something I didn't get right. Thanks a lot.
> >
> > Thanks a lot.
> > Shi
> >
> > _______________________________________________
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> > ParaView at paraview.org
> > http://www.paraview.org/mailman/listinfo/paraview
> >
> > **** Kenneth Moreland
> > *** Sandia National Laboratories
> > ***********
> > *** *** *** email: kmorel at sandia.gov
> > ** *** ** phone: (505) 844-8919
> > *** web: http://www.cs.unm.edu/~kmorel <http://
> www.cs.unm.edu/
> > %7Ekmorel>
> >
> > **** Kenneth Moreland
> > *** Sandia National Laboratories
> > ***********
> > *** *** *** email: kmorel at sandia.gov
> > ** *** ** phone: (505) 844-8919
> > *** web: http://www.cs.unm.edu/~kmorel
> >
> > *
> >
>
> **** Kenneth Moreland
> *** Sandia National Laboratories
> ***********
> *** *** *** email: kmorel at sandia.gov
> ** *** ** phone: (505) 844-8919
> *** web: http://www.cs.unm.edu/~kmorel
>
> *
>
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