Would it be possible to send a small example of your data to the list so we 
could try it out? If not, could you at least send a screen shot so we could 
have a look at the mesh? Right now I'm just making blind guesses.

-Ken


From: Paul Graham <[email protected]<mailto:[email protected]>>
Date: Thursday, November 7, 2013 1:26 AM
To: Kenneth Moreland <[email protected]<mailto:[email protected]>>
Cc: "[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>>
Subject: [EXTERNAL] Re: [Paraview] Stream Tracer Problem

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 
<[email protected]<mailto:[email protected]>> 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 <[email protected]<mailto:[email protected]>>
Date: Wednesday, November 6, 2013 2:40 PM
To: "[email protected]<mailto:[email protected]>" 
<[email protected]<mailto:[email protected]>>
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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