[Paraview] Paraview 4.1.0: Tube filter vary radius by vector or scalar does not work properly

[Cory Quammen]

Hi Jens,

I can't think of a way to do this easily in ParaView using existing
filters. Your best bet is probably to write the scaled tube geometry to
your VTK file directly and visualize that.

Sorry to not be of more help,
Cory

On Thu, Oct 15, 2015 at 10:29 AM, Jens Laube <jlaube at hmi.uni-bremen.de>
wrote:

> Dear Paraview users,
>
> I am using the paraview version 4.1.0 to display forces between
> nanoparticles from a Discrete Element simulation. For the visualization I
> create vtk-files that look like the following minimal example:
>
>
> *# vtk DataFile Version 2.0*
> *Generated by lpp.py*
> *ASCII*
> *DATASET POLYDATA*
> *POINTS 2 float*
> *0.0 0.0 0.0*
> *0.0 0.0 2e-09*
> *LINES 1 3*
> *2 0 1*
>
> *CELL_DATA 1*
> *VECTORS f_pair float*
> *0.0 0.0 -2.12063e-08*
> *SCALARS f_tot float 1*
> *LOOKUP_TABLE default*
> *2.12063e-08*
>
> *POINT_DATA 2*
> *VECTORS i float*
> *0.0 0.0 0.0*
> *0.0 0.0 0.0*
> *VECTORS f float*
> *0.0 0.0 0.0*
> *0.0 0.0 0.0*
> *VECTORS omega float*
> *0.0 0.0 0.0*
> *0.0 0.0 0.0*
> *VECTORS v float*
> *0.0 0.0 0.0*
> *0.0 0.0 -0.4*
> *SCALARS radius float 1*
> *LOOKUP_TABLE default*
> *1.53e-09*
> *1.53e-09*
> *SCALARS type float 1*
> *LOOKUP_TABLE default*
> *1.0*
> *1.0*
> *SCALARS id float 1*
> *LOOKUP_TABLE default*
> *1.0*
> *2.0*
>
>
> The lines defined in this file connect the particle centers and the
> CELL_DATA VECTORS and SCALARS represent the interparticle force vector and
> the absolute force respectively.
> With this file I try to visualize the force by a tube with varying radius
> and color depending on the magnitude of the vorce vector using paraview
> 4.1.0. To this aim I use the Filters "CellDatatoPointData"-->"Tube". In the
> scalars and Vectors field of the "Tube"-filter I can choose the variables "
> *f_tot*" and "f_pair" from the vtk-file, but if I try to scale the radius
> by vector, there is no visible variation of the radius independent of the
> values in "Radius" and "Radius Factor". The only way to receive a varying
> radius is choosing the option "Vary radius By Absolute Scalar" but then I
> cannot manipulate the minimum and maximum thickness of the tube by using
> the values of "Radius" and "Radius Factor". Thus I receive a too large tube.
> Do I miss something basic here? Could anyone give me a hint how to
> customize the visualization properly?
> Thanks a lot
>
> Best Whishes
> Jens Laube
>
>
> --
> Dipl.-Ing. Jens Laube
> Hybrid Materials Interfaces Group
> Universität Bremen
> Am Fallturm 1, D-28359 Bremen
> Tel.   +49 421 218 64574
> Fax    +49 421 218 64599jlaube at hmi.uni-bremen.dewww.hmi.uni-bremen.de
>
>
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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