<div dir="ltr">If you want the seeds to move my suggestion would be to use a programmable source that generates those seeds and then use the Stream Tracer With Custom Source filter. This does require knowing the how the seeds change with time a priori. If you want the seeds to advect with the flow you could try the particle path filter to advect the seeds and use that as your input into the stream tracer with custom source filter. If you do that I'd love to see the resulting animation -- I'd bet it would be quite spectacular!<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Dec 22, 2016 at 3:38 PM, Whitehouse, Paul L. (GSFC-5520) <span dir="ltr"><<a href="mailto:paul.l.whitehouse@nasa.gov" target="_blank">paul.l.whitehouse@nasa.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Jan,<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">This will straddle the boundary of ParaView and Plasma Physics: first, this is a good lesson in the non-reality of the “frozen-in” condition for field lines – they are just integral lines
and something to always keep in mind; second, I think you would have to specify your own list of seed points and have them advect with the plasma over each time step. You would have to use a zero radius and one streamline from each – otherwise you would get
something different each time that wouldn’t look frozen-in.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Paul W <u></u>
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<p class="MsoNormal" style="margin-left:.5in"><b><span style="font-family:Calibri;color:black">From:
</span></b><span style="font-family:Calibri;color:black">ParaView <<a href="mailto:paraview-bounces@paraview.org" target="_blank">paraview-bounces@paraview.org</a><wbr>> on behalf of Jan Deca <<a href="mailto:jandeca@gmail.com" target="_blank">jandeca@gmail.com</a>><br>
<b>Date: </b>Wednesday, December 21, 2016 at 3:55 PM<br>
<b>To: </b>ListServe ParaView <<a href="mailto:paraview@paraview.org" target="_blank">paraview@paraview.org</a>><br>
<b>Subject: </b>[Paraview] moving streamlines with flow<u></u><u></u></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">Hello,<u></u><u></u></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">I am running simulations of magnetized plasma flow through a
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">computational domain. In the simulation the magnetic field lines are
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">moving with the flow. When generating an animation over different time
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">steps (frames), however, the streamtracer uses the same seeds for each
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">frame, and hence the resulting impression is that the field lines do not
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">move in time.<u></u><u></u></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">Would anybody have an idea on how to accomplish moving field lines?<u></u><u></u></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">Thank you!<u></u><u></u></span></p>
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<p class="MsoNormal" style="margin-left:.5in"><span style="font-size:11.0pt;font-family:Consolas;color:black">Jan<u></u><u></u></span></p>
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