CODEWITHSUNDEEP
stlnumpy-stl
stanatomist
stanatomist

Reputation: 73

How do you extract vertices from a numpy-stl mesh?

I am trying to use numpy-stl to extract the vertices from an stl model to use for coherent point drift registration. How do you go about extracting the vertices? I understand how to create a mesh from a list of vertices and faces, but not how to go backwards.

I've tried: Creating a new mesh from vertices and faces. Importing created mesh.

Upvotes: 6

Views: 7523

Answers (1)

Dharmendra
Dharmendra

Reputation: 51

Let's take a .stl file of a cuboid with length 100, width 200, height 300.

from stl import mesh
import numpy as np

cuboid = mesh.Mesh.from_file("./cuboid.stl")
points = np.around(np.unique(cuboid.vectors.reshape([cuboid.vectors.size/3, 3]), axis=0),2)
print "Points are", points.tolist()

Output:

Points are [[0.0, 0.0, 0.0], [0.0, 0.0, 300.0], [0.0, 200.0, 0.0], [0.0, 200.0, 300.0], [100.0, 0.0, 0.0], [100.0, 0.0, 300.0], [100.0, 200.0, 0.0], [100.0, 200.0, 300.0]]

Upvotes: 5

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