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  • ParaViewParaView
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  • #18154
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Issue created May 03, 2018 by W. Alan Scott@wascottMaintainer

Opacity broken for CTH, split views

Opacity is way broken for CTH datasets, split views. I believe there are multiple issues, so you will want to replicate exactly like this, at least once.

  • remote server, 16 ranks, Linux, 5.5.0
  • Edit/ Settings/ Render View/ changed Remote Render Threshold to 0. OK.
  • Open Dave's small CTH dataset. 4 files, all around 100 MBytes each.
  • Turn all variables on, although you only need the Material Volume Fractions (both of them). Apply.
  • ExtractCTHParts. Material Volume Fraction 1. Apply. We now have a sphere.
  • Select "Volume Data" in the pipeline browser.
  • ExtractCTHParts. Material Volume Fraction 2. Apply. We now have a plate
  • -Y
  • Select the first ExtractCTHParts filter in the pipeline browser.
  • Opacity == 0.5

Every thing looks fine at this point.

Note - spewage here about a bad k-d tree. Either this needs to be fixed, or turned off.

ERROR: In /projects/viz/paraview/src/ParaView/5.5.0-sb/ParaView5/VTK/Filters/Parallel/vtkPKdTree.cxx, line 358 vtkPKdTree (0xe68cab0): (process 0) VolumeBounds - degenerate volume

ERROR: In /projects/viz/paraview/src/ParaView/5.5.0-sb/ParaView5/VTK/Filters/ParallelMPI/vtkDistributedDataFilter.cxx, line 878 vtkDistributedDataFilter (0x2d39df0): Unable to build k-d tree structure

ERROR: In /projects/viz/paraview/src/ParaView/5.5.0-sb/ParaView5/VTK/Filters/ParallelMPI/vtkDistributedDataFilter.cxx, line 698 vtkDistributedDataFilter (0x2d39df0): vtkDistributedDataFilter::Execute k-d tree failure

  • Split view horizontal.
  • Render View.

Notice that the sphere has disappeared. This is a bug. You also get the following:

ERROR: In /projects/viz/paraview/src/ParaView/5.5.0-sb/ParaView5/VTK/Filters/Parallel/vtkPKdTree.cxx, line 358 vtkPKdTree (0xc367e0): (process 0) VolumeBounds - degenerate volume

ERROR: In /projects/viz/paraview/src/ParaView/5.5.0-sb/ParaView5/VTK/Filters/ParallelMPI/vtkDistributedDataFilter.cxx, line 878 vtkDistributedDataFilter (0xb3391b0): Unable to build k-d tree structure

ERROR: In /projects/viz/paraview/src/ParaView/5.5.0-sb/ParaView5/VTK/Filters/ParallelMPI/vtkDistributedDataFilter.cxx, line 698 vtkDistributedDataFilter (0xb3391b0): vtkDistributedDataFilter::Execute k-d tree failure

Edited Aug 31, 2020 by W. Alan Scott
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