How can I iterate over faces that contain a vertex with a given ID?

[PhilNamesnik8463]

I have a surface mesh in 3D, represented by a Mesh object. For a single vertex v_i of that mesh, I want to find all faces that contain v_i. In a next step I want to find the normals of the surrounding faces. Thanks!
Edit: I use Python for that task.

[Grantim]

Hello!

You can do it like this:

from meshlib import mrmeshpy as mm

mesh = mm.makeSphere(mm.SphereParams()) # as example
v_i = mm.VertId(0) # as example
for e in mm.orgRing(mesh.topology,v_i): # iterate over incident edges of `v_i`
    f = mesh.topology.left(e) # find left face
    if not f.valid():
        continue # skip edges with no left face
    fNorm = mesh.normal(f)
    print (fNorm)