[Paraview] How to use paraview to mark something on the object

[Berk Geveci]

An interesting problem :-) Does the topology of the mesh change over time
or just the positions of the points? Essentially, we need a landmark that
moves with the wheel to which we can attach something. If the topology does
not change, you can start by selecting one of more cells, extracting the
selection and then coloring those cells a solid color (you might need to
translate them slightly to avoid rendering artifacts). If that works, you
could use the Python Programmable filter to create a line that starts at
the centroid of the extracted cell. If you want to do that, let us know and
someone on this list can help you with the appropriate VTK API.

On Wed, Jun 6, 2012 at 11:36 AM, Tianshi SUN <stsstc at gmail.com> wrote:

> Hi all,
>
> I am new for paraview, and thank in advance for all kinds of help.
> My question : I am doing the visualization of a wheel rotating on the
> road, and want to do some marks (e.g line..) on the wheel. The marks can
> move with the wheel together, so that we can see the wheel is rotating but
> not just slithering on the road. Also the color of the wheel is changing
> for each time step, because the displacement is also changing in X,Y and Z
> directions, but the marks should have a fixed color, which can make it
> obvious to be observed. I do not know how to do it. Please help me.
>
> Regards.
>
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