Evenly spaced streamlines 2D error

ParaView Support
1

Hello.
I have an error when I try to use EvenlySpacedStreamlines2D.
I’m trying to show pvtu 3D cell data with EvenlySpacedStreamlines2D.
So I tried following methods.

  1. Open data.
  2. Filter - CellDatatoPointData
  3. Filter - Slice - Z normal
  4. Filter - Calculator - “MS_B(T)_X”*iHat+“MS_B(T)_Y”*jHat
  5. Filter - EvenlySpacedStreamlines2D

Then error message is opened with no output data.
This is the error message.

ERROR: In C:\glr\builds\paraview\paraview-ci\build\superbuild\paraview\src\VTK\Common\ExecutionModel\vtkExecutive.cxx, line 753
vtkPVCompositeDataPipeline (0000010D3E253180): Algorithm vtkEvenlySpacedStreamlines2D(0000010D6FBAA600) returned failure for request: vtkInformation (0000010D78635990)
Debug: Off
Modified Time: 24541029
Reference Count: 1
Registered Events: (none)
Request: REQUEST_DATA
FORWARD_DIRECTION: 0
ALGORITHM_AFTER_FORWARD: 1
FROM_OUTPUT_PORT: 0

I tried in Paraview 5.10.1, Paraview 5.11.0, and Paraview Master 5.11.0-RC1.
And no success.

I attached my pvtu file.
Air2.zip (2.0 MB)

Any reply would be helpful.
Thank you.

2

Hi,

After cutting at z=0.0005, specify Start Position in EvenlySpacedStreamlines2D as
-0.065506252,-0.00444358875,0.0005
I was able to draw streamlines on only one piece of the surface. If the surface is divided into several pieces, it may be necessary to apply EvenlySpacedStreamlines2D to each piece.

3

Dear Kyoshimi,

Thank you very much!
It was worked. But still I can’t draw other pieces, even though I set Start Position in EvenlySpacedStreamlins2D.
I will keep trying.
Thank you.

4

Hi,

I have automated this with a python script.
streams.py (5.7 KB)

To use it, place streams.py in the same folder as vg_VolTs_VTK_Air2_5.pvtu and in ParaView 5.10.1, specify streams.py from “File > Load State…”.

5

Dear, Kyoshimi

Amazing!
I didn’t know about “Connectivity” and “Threshold” filters.
Actually, I modified the part of file location in your streams.py file. Then it worked.

image
image974×794 16.4 KB

Maybe I should study those filters and your script.
Thank you very much.