CODEWITHSUNDEEP
python3dvtk
Paula
Paula

Reputation: 11

How to calculate the volume of a vtk file

I'm just new to python and I can't seem to find a solution to my problem, since it seems to be pretty simple. I have a geometry on paraview, I'm saving it as a vtk file and I'm trying to use python to calculate it's volume.

This is the code I'm using:

import vtk
reader = vtk.vtkPolyDataReader()
reader.SetFileName("C:\Users\Pauuu\Google Drive\2016-01\SURF\Sim Vascular\Modelos\apoE183 Day 14 3D\AAA.vtk")
reader.Update()
polydata = reader.GetOutput()

Mass = vtk.vtkMassProperties()
Mass.SetInputConnection(polydata.GetOutput())
Mass.Update() 

print "Volume = ", Mass.GetVolume() 
print "Surface = ", Mass.GetSurfaceArea()

I think there might be a problem with the way im loding the data, and i get the AttributeError: GetOutput.

Do you know what might be happening or what I'm doing wrong? Thank you in advance.

Upvotes: 1

Views: 4033

Answers (3)

SAAD
SAAD

Reputation: 789

Depending on your version of vtk package you may want to test the following syntax if your version <= 5:

  Mass.SetInput(polydata.GetOutput());

Otherwise, the actual syntax is:

  Mass.SetInputData(polydata.GetOutputPort());

PS: you can check the python-wrapped vtk version by running:

import vtk
print vtk.vtkVersion.GetVTKSourceVersion()

Upvotes: 2

lib
lib

Reputation: 2956

I guess you have VTK 6 , you can provide as input to a filter either the output port of a filter or a vtkDataObject :

Mass.SetInputConnection(reader.GetOutputPort())
Mass.SetInputData(polydata) #that is Mass.SetInputData(reader.GetOutput())

For understanding why these method are not equivalent when updating a pipeline, and for comparison with the previous version, see http://www.vtk.org/Wiki/VTK/VTK_6_Migration/Removal_of_GetProducerPort http://www.vtk.org/Wiki/VTK/VTK_6_Migration/Replacement_of_SetInput

Upvotes: 0

tdka
tdka

Reputation: 96

You have assigned reader.GetOutput() in polydata. From polydata, I believe you need to do, polydata.GetOutputPort()

Upvotes: 1

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