[Paraview] Stream Tracer Problem

[Paul Graham]

Hi Ken,

Thanks for your suggestions.  I still haven't worked out why it's not
working, but I notice that no data is registering in the Stream Tracer
filter.  It's mesh is empty - no points or cells - and the bounding
information not available.

I tried a high density Line Source, as you suggested, as well as increasing
the number of seed points within the radial ball of the Point Source but
without success.  However, both the Line Source and the Point Source
correctly display within the domain of the 3D vector field.

The vectors themselves (from the glyph filter) display correctly.

Paul


On 7 November 2013 09:05, Moreland, Kenneth <kmorel at sandia.gov> wrote:

>   That is not a lot of detail to go on so I have to guess what the
> problem is. It is probably either that the seeds are not intersecting the
> mesh or that vectors do not yield good lines.
>
>  If you mesh is very thin or comprises surface elements, then chances are
> all the seed points are outside your mesh. The default point source is
> actually a point cloud with randomly selected points within a sphere of a
> certain radius. If your mesh is flat, the chance of any seed happening to
> hit it are extremely low. Try changing to a line source and see if that
> helps.
>
>  It could be that the vectors your creating are not integrating well. It
> could be that the vectors are pointing off of the mesh (which is also
> common in thin or flat meshes). Thus it dies before it starts. Or perhaps
> it has some other feature that makes it difficult to integrate.
>
>  -Ken
>
>   From: Paul Graham <meteorpaul at gmail.com>
> Date: Wednesday, November 6, 2013 2:40 PM
> To: "paraview at paraview.org" <paraview at paraview.org>
> Subject: [EXTERNAL] [Paraview] Stream Tracer Problem
>
>    Hi Everyone,
>
> I am unable to display a Stream Tracer and not sure what is going wrong.
> After creating a vector field using the Calculator Filter, I added the
> Stream Tracer filter using a point source seed (default setting).  The
> point source  origin is displayed but nothing else.  Can anyone help me as
> to what I have to do to get the stream lines to show?
>
>  Thanks in advance,
>
>  Paul
>
>
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