[Paraview] [EXTERNAL] rgb lookup table

[Cory Quammen]

On Sat, Jun 30, 2018 at 6:34 PM Claudio <cv39100 at yahoo.com> wrote:

> sorry if late. that worked great Cory
> thanks again
>      -Claudio
>

Thanks for the follow up, I am glad it is working.

Cory


>
> On Wednesday, June 13, 2018, 3:48:05 PM EDT, Cory Quammen <
> cory.quammen at kitware.com> wrote:
>
>
> Claudio,
>
> ParaView ignores the LOOKUP_TABLE you specified in your VTK file. Instead,
> elaborating on what Alan suggested, you can do the following:
>
> * Load your data
> * Add a "Tensor Glyph" filter.
> * Color the "Tensor Glyph" filter by the "sample_scalars" array. This
> should actually happen by default.
> * Open up the Color Map Editor.
> * Near the top of the Color Map Editor dialog, check the box "Interpret
> Values as Categories"
> * Under "Annotations", click on the toolbutton "Add active values from
> selected sources". This will assign a unique color to each glyph. You can
> customize these colors by clicking on the circular color swatch in the left
> column of the Annotations table.
>
> Hope that helps,
> Cory
>
> On Fri, Jun 8, 2018 at 6:42 PM Scott, W Alan via ParaView <
> paraview at public.kitware.com> wrote:
>
> Hi Claudio,
>
> I have never done this, but it sounds like you are looking for an
> annotation, rather than a continuous color map.  Could you flip to
> annotations, then color using an int?
>
>
>
> Alan
>
>
>
>
>
> *From: *ParaView <paraview-bounces at public.kitware.com> on behalf of
> Claudio via ParaView <paraview at public.kitware.com>
> *Reply-To: *Claudio <cv39100 at yahoo.com>
> *Date: *Wednesday, June 6, 2018 at 8:46 AM
> *To: *"paraview at public.kitware.com" <paraview at public.kitware.com>
> *Subject: *[EXTERNAL] [Paraview] rgb lookup table
>
>
>
> Hi,
>
> I'm stuck with a problem concerning colors assignment to data.
>
> I've a list of 8 tensors (here represented as circular ellipsoids, see
> short vtk file below)
>
> I typically open the file and filter using ("tensor glyph").
>
> Now I would like to assign to each tensor glyph a unique color specified
> by an rgba sequence (e.g. 0.1 0.3 0.2 1)
>
> How can I do that? I tried to append a scalar lookup table followed by a
> rgba one but without success
>
> Thanks
>
>    -Claudio
>
>
>
>
>
> # vtk DataFile Version 3.0
>
> Random data to test tensors
>
> ASCII
>
> DATASET UNSTRUCTURED_GRID
>
> POINTS 8 float
>
> 0 0 0
>
> 1 0 0
>
> 0 1 0
>
> 1 1 0
>
> 0 0 1
>
> 1 0 1
>
> 0 1 1
>
> 1 1 1
>
>
>
> POINT_DATA 8
>
>
>
> TENSORS spherical_ellipsoid float
>
> 1 0 0
>
> 0 1 0
>
> 0 0 1
>
>
>
> 1 0 0
>
> 0 1 0
>
> 0 0 1
>
>
>
> 1 0 0
>
> 0 1 0
>
> 0 0 1
>
>
>
> 1 0 0
>
> 0 1 0
>
> 0 0 1
>
>
>
> 1 0 0
>
> 0 1 0
>
> 0 0 1
>
>
>
> 1 0 0
>
> 0 1 0
>
> 0 0 1
>
>
>
> 1 0 0
>
> 0 1 0
>
> 0 0 1
>
>
>
> 1 0 0
>
> 0 1 0
>
> 0 0 1
>
>
>
> SCALARS sample_scalars float 1
>
> LOOKUP_TABLE rgbtable
>
> 0
>
> 1
>
> 2
>
> 3
>
> 4
>
> 5
>
> 6
>
> 7
>
>
>
> LOOKUP_TABLE rgbtable 8
>
> 0.2 0.4 0.3 1.0
>
> 04.0 2.0 1.0 1.0
>
> 0.4 1.0 0.2 1.0
>
> 1.0 1.0 0.7 1.0
>
> 0.2 0.0 5.0 1.0
>
> 1.0 0.2 1.0 1.0
>
> 2.0 1.0 1.0 1.0
>
> 0.0 1.0 0.9 1.0
>
>
>
>
>
>
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>
> --
> Cory Quammen
> Staff R&D Engineer
> Kitware, Inc.
>


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