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Get the velocity values of a streamline

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Old   May 12, 2016, 07:59
Default Get the velocity values of a streamline
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Pierre Bobillier
Join Date: May 2012
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lybhur is on a distinguished road
Hi all,

Here is a piece of code for a programmable filter. The idea is to get the all velocity values of each streamlines.

If you look at the streamtracer output in a spreadsheet view, and in particular the integration time column, you will notice that each streamline begin with a zero.
So to isolate each streamline, I check all the zeros of the integration time column.

Then I want to use the "j" variable to slice the velocity array

from vtk.numpy_interface import dataset_adapter as dsa
from vtk.numpy_interface import algorithms as algs

input0 = inputs[0]
IntegrationTime = input0.PointData["IntegrationTime"]
Velocity = input0.PointData["Velocity"]

index = algs.where(IntegrationTime==0)


print'j value : ', j
print'j type : ', type(j)
print j[0]
I thought that the variable "j" would be an integer but I think there is a bug because here is the result I have got in the output window (picture enclosed)

What did I missed ?!
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