How to know vertex points of a segmented model(stl)?

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1

I have done segmentation of a model in stl file. But I want to know how many vertices points do the stl model have on it? How can I know about the vertices points?

2

In python:
nOfPoints = getNode('myModel').GetMesh().GetNumberOfPoints()

For the number of vertices, I guess you mean, points from the border edges of an open mesh, then you can use this filter with only the option BoundaryEdgesOn

HIH

3

Thank you so much for the information.
I wanted to know if there is any built in feature or function in 3D Slicer for this? I know, in 3D Slicer, it allows to do targeted value meshing ( through surface toolbox). But I want to know vertex points before any targeted meshing (just after doing segmentation)? And is the filter (that you mentioned) applicable in 3D slicer directly?