Color a mesh by height and width

Question

I am trying to color an object based on the width of this later.

Thank you

I tried to inspire myself from this code But this later is for the height. And I want to set a color map based on the width for each z-slice, like the figure below

Answer 1

Using vedo:

pip install -U git+https://github.com/marcomusy/vedo.git

then (ignore printouts)

from vedo import *

m = Mesh("airways_no_labels.stl").decimate(0.1)
pts = m.points()

lns=[]
for z in pts[:,2]:
    ln = m.intersect_with_plane([0,0,z], [0,0,1])
    if ln.npoints:
        lns.append(ln.average_size())
    else:
        lns.append(0.0)
        
m.cmap("RdYlGn", lns, vmin=15).add_scalarbar(size=(50,400))
show(m, axes=1, size=(700,1200), elevation=-90)