<div dir="ltr">Hi again list,<br><div><br>Inspired by David Ortley's recent success (see "Smooth seams in SILO files") I wonder if perhaps the way I'm doing it is correct, but Paraview is incorrectly considering the values at hidden nodes when calculating data ranges.<br><br></div><div>Essentially my "option 3" (writing a vtkGhostLevels array) appears to work as it should, and the "seams" are hidden in my parallel data. But, if I then Extract Surface and look at the Data Arrays -> Data Ranges I see values which can only be from non-surface nodes. I suspect they are probably from nodes on the (hidden) interior surfaces. This is obviously a bug.<br><br></div><div>I could probably provide a minimal example if useful.<br><br></div><div>Best wishes,<br></div><div>Louie<br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 17 January 2015 at 16:26, Louie Cardone-Noott <span dir="ltr"><<a href="mailto:louie.cardone-noott@linacre.ox.ac.uk" target="_blank">louie.cardone-noott@linacre.ox.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="HOEnZb"><div class="h5"><div dir="ltr"><div><div><div><div><div><div><div>Hi Paraview list,<br><br></div>I use a finite element code that generates VTK output, but I'm having trouble dealing with halo (ghost) nodes/elements correctly.<br><br></div>We currently partition meshes node-wise, and each process writes all its owned nodes and one level of halo nodes to a chunk. Once all the chunks are loaded there is a "double layer" of internal boundaries between processes. I'd really like to be able to use the Extract Surface filter correctly but as you would expect it also finds all the internal surfaces. From searching I've tried:<br></div><br>* Clean To Grid, but this removes both sides of the double layer leaving unsightly gaps.<br></div>* Writing a vtkGhostPoints array (on nodes) but this seems not to be used by this filter (or Paraview at all?)<br></div>* Writing a vtkGhostLevels array (on elements). This correctly hides all the ghost elements at the internal boundaries (great!) but still doesn't let me do everything I want to. For example, the extracted surface looks right, but the array limits still seem to be based on the max/min of the external AND internal surfaces, so I suspect the internal ones are just "hidden from view".<br><br></div><div>What's the right way to deal with this?<br></div><div><br></div>Thanks in advance.<br><br></div>Louie<br></div>
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