MantisBT - ParaView
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IDProjectCategoryView StatusDate SubmittedLast Update
0013490ParaView(No Category)public2012-10-03 14:482016-08-12 09:59
ReporterJoel Mayes 
Assigned ToKitware Robot 
PrioritynormalSeverityminorReproducibilityhave not tried
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version3.14.1 
Target VersionFixed in Version 
ProjectTBD
Topic Name
Typeincorrect functionality
Summary0013490: Cannot slice/contour a data set containg Polyhedron cells where the node values are < 1e-6
DescriptionSlicing or contouring a data set containing polyhedron cells where all the nodal vertex locations are less than 1e-6 produces no sliced or contoured results.

I expect there is a problem with contouring or clipping in polyhedron cells. I found a potential problem in VTK source for ver5.10 src/VTK/Filtering/vtkPolyhedron.cxx in the internal section there is a method called RemoveDuplicatedPointsFromFaceArrayAndEdgeTable and within the method a constant value "const double eps = 0.000001;" is used to merge node locations.
I suspect that if all locations are < than this constant all nodes are merged.

I also notices this constant is repeated in several sections through out the vtkPolyhedron.cxx source.
 
In the uploaded file a single cell polyhedron is given with 6 faces and 4 nodes per face with node values < 1e-6 , when read by Paraview 3.14.1 and sliced, produced no results. If the file is modified where connectivity remains the same but the nodes are changed to 1e-5, then paraview will correctly slice the modifed data set.
Steps To Reproduce
Additional Information
TagsNo tags attached.
Relationships
related to 0014485closed Will Schroeder VTK vtkCutter produces incorrect results (gaps) in output of unstructured grids containing polyhedron cells 
Attached Files? simple_1_g.vtu (1,618) 2012-10-03 14:48
https://www.vtk.org/Bug/file/9289/simple_1_g.vtu
Issue History
Date ModifiedUsernameFieldChange
2012-10-03 14:48Joel MayesNew Issue
2012-10-03 14:48Joel MayesFile Added: simple_1_g.vtu
2016-03-24 08:39Ryo TakayamaNote Added: 0035857
2016-03-24 09:56Gerrick BivinsNote Added: 0035859
2016-03-25 04:50Ryo TakayamaNote Added: 0035861
2016-07-06 15:26Cory QuammenRelationship addedrelated to 0014485
2016-07-12 11:56Cory QuammenNote Added: 0036341
2016-08-12 09:59Kitware RobotNote Added: 0038256
2016-08-12 09:59Kitware RobotStatusbacklog => closed
2016-08-12 09:59Kitware RobotResolutionopen => moved
2016-08-12 09:59Kitware RobotAssigned To => Kitware Robot

Notes
(0035857)
Ryo Takayama   
2016-03-24 08:39   
Still not fixed in the latest ParaView 5.0.1 RC2.

I also noticed the same problem happened when resulting cross-sectional surface has a high aspect ratio, for example slicing in x normal direction a cuboid whose VTK cell type is polyhedron and lengths are 1, 1 and 0.01 in x, y and z respectively.
(0035859)
Gerrick Bivins   
2016-03-24 09:56   
I think this is related:
http://www.vtk.org/Bug/view.php?id=14485 [^]

I don't have permission to modify the "New relationship" field so adding it as a note here
(0035861)
Ryo Takayama   
2016-03-25 04:50   
Thanks, Gerrick!
I believe this problem is exactly the same as the issue you reported.
(0036341)
Cory Quammen   
2016-07-12 11:56   
A workaround could be to use the Transform filter to scale up the coordinates, do the slicing or contouring, then Transform the result by the inverse scale.
(0038256)
Kitware Robot   
2016-08-12 09:59   
Resolving issue as `moved`.

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