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IDProjectCategoryView StatusDate SubmittedLast Update
0014485VTK(No Category)public2013-12-20 14:522016-08-12 09:55
ReporterGerrick Bivins 
Assigned ToWill Schroeder 
PriorityhighSeverityminorReproducibilityhave not tried
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version5.10.1 
Target VersionFixed in Version 
Summary0014485: vtkCutter produces incorrect results (gaps) in output of unstructured grids containing polyhedron cells
DescriptionI’ve run into a strange problem where with unstructured grids containing polyhedron cells, vtkCutter is leaving “gaps” in the output polydata.

Attached is a simple 2 cell unstructured grid and example that demonstrates the problem.
Tagspolyhedron
ProjectTBD
Typeincorrect functionality
Attached Files? file icon slicer_gap_example.vtu [^] (1,626 bytes) 2013-12-20 14:52
cxx file icon Cutter2CellPolyhedron-issue.cxx [^] (4,229 bytes) 2013-12-20 14:53

 Relationships
related to 0015999closedKitware Robot VTK vtkCutter sometimes incorrectly cuts vtkQuadraticHexahedron when generating polygons 
related to 0013490closedKitware Robot ParaView Cannot slice/contour a data set containg Polyhedron cells where the node values are < 1e-6 
related to 0015841closedKitware Robot VTK vtkCutter not cutting vtkPolyhedron cells correctly 

  Notes
(0032173)
Gerrick Bivins (reporter)
2014-01-13 17:47

 The issue is the hard coded tolerance setting in the calculation of vtkPolyhedron::CheckContourDimensions.
By changing the
static const double eigenvalueRatioThresh =.0001
to
static const double eigenvalueRatioThresh =1e-12

using vtkCutter on my models produced the correct output.
The attached model can use a different tolerance but to capture
correct results from all of my models (so far) it needed to be 1e-12;

The reason that it failed has to do with the eigenvalues check and the tolerance.
For my models, the eigenvalues calculated were something like:
420.25,.25,0 (failed to generate)
420.25,225.0,0 (generated)

For the failed case,the ratio calculations passed both of the "if conditions"
because of the low tolerance, thus reducing the dimensions to "1".

I'm not sure of the proper fix but my suggestion would be to change the tolerance to
something much smaller (1e-12) and/or expose a way to
set the tolerance from the mesh or the algorithm.
(0035469)
Frank Conradie (reporter)
2015-11-18 17:24

 I am experiencing this issue as well, but the suggested "eigenvalueRatioThresh" fix does not work for me. Is there any news on this issue?
(0035858)
Gerrick Bivins (reporter)
2016-03-24 09:54

 Looks related:
http://www.vtk.org/Bug/view.php?id=13490 [^]
(0035862)
Ryo Takayama (reporter)
2016-03-25 07:30

 With ParaView 5.0.1 RC2, I got the same result as Frank mentioned.
(0037317)
Kitware Robot (administrator)
2016-08-12 09:55

 Resolving issue as `moved`.

This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page.

 Issue History
Date Modified Username Field Change
2013-12-20 14:52 Gerrick Bivins New Issue
2013-12-20 14:52 Gerrick Bivins File Added: slicer_gap_example.vtu
2013-12-20 14:53 Gerrick Bivins File Added: Cutter2CellPolyhedron-issue.cxx
2013-12-20 14:53 Gerrick Bivins Tag Attached: polyhedron
2014-01-13 17:47 Gerrick Bivins Note Added: 0032173
2014-10-06 14:58 Will Schroeder Assigned To => Will Schroeder
2015-11-18 17:24 Frank Conradie Note Added: 0035469
2016-03-24 09:54 Gerrick Bivins Note Added: 0035858
2016-03-25 07:30 Ryo Takayama Note Added: 0035862
2016-07-06 15:26 Cory Quammen Relationship added related to 0015999
2016-07-06 15:26 Cory Quammen Relationship added related to 0013490
2016-07-06 15:27 Cory Quammen Relationship added related to 0015841
2016-08-12 09:55 Kitware Robot Note Added: 0037317
2016-08-12 09:55 Kitware Robot Status backlog => closed
2016-08-12 09:55 Kitware Robot Resolution open => moved

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