Finding center of designated points

Support
1

I’m trying to figure out how to find the center of 4+ points that I place on a 3D model. I’m placing the points on two separate models (they’re vertebrae) and the center point would lie in the space in between the models.

2

The centroid of the points would just be the average of the coordinates. If the points are the control points of a markups node, the following would calculate it

myMarkupsNode = slicer.util.getNode('F') # replace 'F' with the name of the markups node containing your points

# Calculated center point position
import numpy as np
pointPositionArray = slicer.util.arrayFromMarkupsControlPoints(myMarkupsNode, world=True)
centerPosition = np.mean(pointPositionArray, axis=0)

# Create a new markups node and put a point at the calculated center
centerPointMarkupsNode = slicer.mrmlScene.AddNewNodeByClass('vtkMRMLMarkupsFiducialNode', 'MyCenterPoint')
centerPointMarkupsNode.AddControlPoint(centerPosition)