[Paraview] Lock Data Range for multiple attributes

[Mathieu Westphal]

Hello Venke,

Sure, here is the process to set up the lookuptable correctly with the gui:
 - Open ParaView
 - Open your data
 - Color with the data you want to "lock"
 - Show the Color Map Editor ( Right Click on toolbar, Color Map Editor)
- Click on the cogwheel to show advanced options
- Click on the dot on the color line (below the graph) to remove all data
point except the minimum and maximum
- Click on the color line (below the graph) to add two datapoint
approximativally around the locked range you want to set
- Set the correct value for the data point you just added in the table
- Copy the RGB color of the minimum and maximum into your locked range

Done

A side effect is the scalar bar does not show the information you want, but
the color on the mesh are correct.
In Any case, the "Lock Data Range" option should work, but it doesn't, so
it looks like a bug to me.


Regards,


Mathieu Westphal

On Thu, Sep 15, 2016 at 11:30 AM, <postgurke at web.de> wrote:

> Hello Mathieu
>
> Thank you for your answer. Unfortunately I don't quite understand :(. I
> tried to
> duplicate the first and last point of LUT.RGBPoints (which are initially
> correct
> before I look at a different attribute and switch back) - but this does
> not do
> the trick. Sorry, I am not used to reading from State-Files. Do you have a
> short
> explanation what you did in either the Paraview python shell or GUI to
> achieve
> this?
>
> Cheers
> Venke
>
>
>
> > Mathieu Westphal <mathieu.westphal at kitware.com> hat am 15. September
> 2016 um
> > 10:46 geschrieben:
> >
> >
> > Hello
> >
> > There is an easy work around for this. Do not use the lock range feature,
> > but add lookup table point on the data value you want to lock.
> > See attached pvsm, locked data are RTData and Results.
> >
> >
> >
> >
> > Mathieu Westphal
> >
> > On Thu, Sep 15, 2016 at 9:44 AM, <postgurke at web.de> wrote:
> >
> > > Hello
> > >
> > > Does nobody have a solution for this, or am I missing something
> obvious?
> > > The only thing I can do to fix the color ranges is separate the file
> into
> > > multiple objects, but as one can only look at one at a time anyways (as
> > > they are
> > > at the same location, obviously) and our model already contains a lot
> of
> > > objects, this is rather bothersome...
> > >
> > > Cheers
> > > Venke
> > >
> > >
> > >
> > > > postgurke at web.de hat am 9. September 2016 um 09:52 geschrieben:
> > > >
> > > >
> > > > Hello All
> > > >
> > > > Sorry to bother you again... I seem to miss something wanting to fix
> > > color
> > > > scale
> > > > ranges for objects with multiple attributes.
> > > > For example: I have a vtk-Plane with associated velocity and density
> > > values
> > > > that
> > > > I can choose for coloring. When I imported the object, I set
> > > > LUT.RescaleTransferFunction(min, max) and LUT.LockDataRange = 1 for
> both
> > > > attributes (with different min,max, of course). In the GUI everything
> > > looks
> > > > fine
> > > > at first, but when I switch the coloring from one attribute to
> another,
> > > > ParaView
> > > > seems to ignore the checked "Lock Data Range" but switches to some
> > > Min/Max
> > > > found
> > > > in the data. Maybe I misunderstand the functionality of "Lock Data
> > > Range"? Is
> > > > this the expected behaviour? If yes, what could I do to really fix
> the
> > > min,max
> > > > to my own specification? (I also tried to use a preset color scale
> with
> > > my
> > > > desired min,max, but this does not change the behaviour either.)
> > > >
> > > > Thanks for your support and any ideas on this,
> > > > Venke
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