Suppose I have a vti file containing a scalar field (such as velocity) and its corresponding spatial coordinates (x, y, z coordinates), how should I read the vti file using Python programming and convert the vtil file to a numpy array in Python programming?
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You should check out the vtki Python package. It provides a NumPy interface back to all VTK data objects.
Installation is simply
pip install vtki
Then in Python, reading your file is simply:
import vtki
data = vtki.read(‘my_file.vti’)
# Get points as NumPy array
points = data.points
Please see this series of blog posts on using VTK and numpy for a thorough overview on how to do this. https://blog.kitware.com/improved-vtk-numpy-integration/