slice method returns None for mesh from stl model

[dan-david]

vedo: v2014.5.1 python: v3.9.18

Why the slice method returns a None object for the .stl model?

from vedo import *
msh = Mesh("sample.stl").alpha(0.1).wireframe()
mslice = msh.slice(normal=[0,1,0], origin=[0,0,0])
mslice.c('purple5')
show(msh, mslice, axes=1)

I am using the following file:

sample.stl.zip

Thanks!

[marcomusy]

It returns None because the plane is not hitting the mesh, this works:

from vedo import *
msh = Mesh("sample.stl").alpha(0.1).wireframe()
mslice = msh.slice(normal=[0,1,0], origin=[0,2,0])
mslice.c('purple5')
show(msh, mslice, axes=1)