[Paraview] Stream Tracer

[Moreland, Kenneth]

The stream tracer filter follows vector fields in 3D space.  Tracing flow on surfaces is problematic because if a position is off the surface, then the stream tracer will not follow it.

The default stream tracer seed points is a cloud of random points centered around some location.  Because the points are picked in 3D space, it is probably picking points off of the surface.  Instead, change the seed points to be on the surface.  Try using the line instead of the point cloud.

You also have to be careful about vectors pointing off of the surface.  Once the stream leaves the surface (which can be immediately), then the stream tracer will stop following the stream.  Make sure the vectors are constrained to be within the surface.  You might be able to constrain the vectors using the Surface Vectors filter.

-Ken


On 10/13/09 5:22 AM, "Karin ...." <glada_me at hotmail.com> wrote:

I have opened a figure in Paraview, just defined by surfaces connected together. Let's say a cube with six surfaces. In the xml file the velocity is defined as PointDataScalars and now I want to create stream traces in the figure. But when I did that with Filters - Alfabetical - Stream Tracer, nothing happened. I have tried both with a point source and a line. When I generate vectors with glyphs it's working, but obvious not with stream tracer. Someone has a clue what I've done wrong?


   ****      Kenneth Moreland
    ***      Sandia National Laboratories
***********
*** *** ***  email: kmorel at sandia.gov
**  ***  **  phone: (505) 844-8919
    ***      web:   http://www.cs.unm.edu/~kmorel

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