Move object to origin

Support
1

Greetings. I started studying VTK, I don’t understand a lot of things.
Now there is a problem. There are several objects in .vtk format that are very far from the origin (see example screenshot from Blender).

Example

image
image1053×797 114 KB

I have the following python code which receives a PolyData output.

import os
import vtk

files = [f for f in os.listdir('.') if os.path.isfile(f)]
for f in files:
    if ".vtk" in f:
        reader = vtk.vtkPolyDataReader()
        reader.SetFileName(f)
        reader.Update()
        polyData = reader.GetOutput()

How, based on this data, move the object to the middle of the scene (the origin)? In other words, I need to move the object to the coordinates (0, 0, z) (we do not touch the z coordinate).

2

You can use vtkTransformPolyDataFilter. You can find a good example of how to use the filter here, https://kitware.github.io/vtk-examples/site/Python/GeometricObjects/OrientedArrow/