<div dir="ltr">Hi Louis,<div><br></div><div>Very cool dataset. My guess is that there is a topology problem with this dataset - some cells that are neighbors but don't exactly share vertices on neighboring faces. Maybe hanging nodes because of some sort of refinement? This is usually when the point locator fails. To locate a cell containing a point, it first locates the closest point and then walks neighboring cells until it finds a match. The walk will fail if two neighbor cells don't actually share points because of some weird topology. The cell locators is the fix to these issues. The reason it is not currently the default is performance. We are working on improving the cell locator performance so that it can be the default behavior in the future.</div><div><br></div><div>Also, as Andy mentioned, the ReasonForTermination array provides good info for debugging such issues. Here are the possible values:</div><div><br></div><div><div> OUT_OF_DOMAIN = 0,</div><div> NOT_INITIALIZED = 1 ,</div><div> UNEXPECTED_VALUE = 2,</div><div> OUT_OF_LENGTH = 4,</div><div> OUT_OF_STEPS = 5,</div><div> STAGNATION = 6,</div></div><div><br></div><div>If you see OUT_OF_DOMAIN inside the mesh, it is usually an indication that you should either fix your mesh or use the cell locator.</div><div><br></div><div>Best,</div><div>-berk</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Feb 7, 2018 at 3:28 PM, Steytler, Louis Louw <span dir="ltr"><<a href="mailto:steytle1@illinois.edu" target="_blank">steytle1@illinois.edu</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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<div style="direction:ltr;font-family:Tahoma;color:#000000;font-size:10pt">Hi Everyone,<br>
<br>
Thanks very much for all the suggestions.<br>
<br>
Setting the streamline interpolator type to:<br>
<br>
<b>streamTracer1.InterpolatorType = 'Interpolator with Cell Locator'<br>
<br>
</b>solved the problem!<br>
<br>
Thanks again,
<span class=""><div><br>
<div class="m_-8863416330344875603BodyFragment"><font size="2"><span style="font-size:10pt">
<div class="m_-8863416330344875603PlainText">Louis Steytler<br>
Department of Mechanical Science and Engineering<br>
University of Illinois at Urbana-Champaign<br>
1206 West Green Street<br>
Urbana, Il 61801<br>
<a href="mailto:steytle1@illinois.edu" target="_blank">steytle1@illinois.edu</a> </div>
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<hr>
<div id="m_-8863416330344875603divRpF758438" style="direction:ltr"><font color="#000000" size="2" face="Tahoma"><b>From:</b> Burlen Loring [<a href="mailto:bloring@lbl.gov" target="_blank">bloring@lbl.gov</a>]<br>
<b>Sent:</b> 07 February 2018 12:50 PM<br>
<b>To:</b> Steytler, Louis Louw<br>
<b>Subject:</b> Re: [Paraview] Broken Streamlines<br>
</font><br>
</div>
<div></div>
<div>Hi Louis,<br>
<br>
Is there any chance this is the rendering precision issue called depth buffer fighting? What happens when you turn off display of the plane? Are the streamlines still broken?<br>
<br>
Burlen<div><div class="h5"><br>
<br>
<div class="m_-8863416330344875603moz-cite-prefix">On 02/07/2018 09:06 AM, Steytler, Louis Louw wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">
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<div style="direction:ltr;font-family:Tahoma;color:#000000;font-size:10pt">Hi Everyone,<br>
<br>
When generating streamlines from a 3D computation, in some parts, the streamlines appear broken. This is shown in the attached image (the arrows point to the broken parts).<br>
<br>
Increasing the "Maximum Streamline Length" parameter did not help.<br>
<br>
Using the "Point to Cell Data" filter, and then generating streamlines on the cell data did not help.<br>
<br>
Although in the image shown the broken parts are in an area of low velocity, this happens in regions of high velocity as well. It also does not seem to depend on grid resolution, as the broken parts show up all over.<br>
<br>
Has anyone experienced anything like this? Any ideas how to work around this?<br>
<br>
Thanks very much,<br>
<div><br>
<div class="m_-8863416330344875603BodyFragment"><font size="2"><span style="font-size:10pt">
<div class="m_-8863416330344875603PlainText">Louis Steytler<br>
Department of Mechanical Science and Engineering<br>
University of Illinois at Urbana-Champaign<br>
1206 West Green Street<br>
Urbana, Il 61801<br>
<a class="m_-8863416330344875603moz-txt-link-abbreviated" href="mailto:steytle1@illinois.edu" target="_blank">steytle1@illinois.edu</a>
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