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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 
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.
TagsNo tags attached.
ProjectTBD
Topic Name
Typeincorrect functionality
Attached Files? file icon simple_1_g.vtu [^] (1,618 bytes) 2012-10-03 14:48

 Relationships
related to 0014485closedWill Schroeder VTK vtkCutter produces incorrect results (gaps) in output of unstructured grids containing polyhedron cells 

  Notes
(0035857)
Ryo Takayama (reporter)
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 (reporter)
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 (reporter)
2016-03-25 04:50

 Thanks, Gerrick!
I believe this problem is exactly the same as the issue you reported.
(0036341)
Cory Quammen (developer)
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 (administrator)
2016-08-12 09:59

 Resolving issue as `moved`.

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

 Issue History
Date Modified Username Field Change
2012-10-03 14:48 Joel Mayes New Issue
2012-10-03 14:48 Joel Mayes File Added: simple_1_g.vtu
2016-03-24 08:39 Ryo Takayama Note Added: 0035857
2016-03-24 09:56 Gerrick Bivins Note Added: 0035859
2016-03-25 04:50 Ryo Takayama Note Added: 0035861
2016-07-06 15:26 Cory Quammen Relationship added related to 0014485
2016-07-12 11:56 Cory Quammen Note Added: 0036341
2016-08-12 09:59 Kitware Robot Note Added: 0038256
2016-08-12 09:59 Kitware Robot Status backlog => closed
2016-08-12 09:59 Kitware Robot Resolution open => moved
2016-08-12 09:59 Kitware Robot Assigned To => Kitware Robot

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