Python API - STL mesh import and offset strategies

[f-pucci]

Good morning everyone,
I hope you are doing well.

I was wondering if anyone could help me with the Python API or if you could suggest me the correct set of functions that I would need to use to be able to import ant STL file, voxelize the geometry and perform an "erosion" operation using distance functions. And then perform a Laplacian smooth.

My main objective is to do an "intrusion" of my geometry, setting an inwards offset.

Can anyone suggest me how to approach this? Is it better to use the C++ code or can I also use the Python API?

At the moment, I have only managed to do the following:

import pyopenvdb as vdb
import meshio
import numpy as np

mesh = meshio.read('./geometry.stl')
resolution = 0.001

sg = vdb.FloatGrid.createLevelSetFromPolygons(
    points=mesh.points,
    triangles=mesh.cells_dict.get('triangle', None),
    transform=vdb.createLinearTransform(voxelSize=resolution),
    halfWidth=3)

sg.name = 'surface'

Thank you so much in advance for your help!