I'm pretty new to blender, what brought me here is that I'm working gon a project in which we're looking for a simple way to measure 3d cuts of a body scan, in order to identify spine deformations in patients. Basically we 3d scan their torso, cut it in Blender and measure the angle of the largest diameter versus the x-axis. That's the idea, also we need to find the centroid of the elliptical-like shape that will result from the cut, therefore we could use the min-diameter crossing the max diameter to find it. Some people said I should try other software, they indicated QGIS and ImageJ but some said it can be done in Blender somehow. So here I am.

This diagram shows what we are looking for: enter image description here

To determinate the level of deformation of the spine we need to obtain the angle between PAX and BSR. And also compare the distances between the centroids of both a cut in the height of the torso and a cut in the base of the spine, when you draw one on top of the other you'll see they are quite far apart because of scoliosis or whatever deformation happened.

  • $\begingroup$ scripting will definitly help. The centroid could be quite close to the median if the points on the edge are equally spaces (by a remesh for ex.) $\endgroup$ – HenrikD Nov 18 '19 at 21:19

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