determine the outermost coordinates of a 3D object

Hi. As reported in the title, I would like to determine the outermost coordinates of a 3D object.

I have a 3D object (.txt file) composed of many nodes (mx3 matrix) both inside and outside the 3D object.

I am looking for a way to determine only the outer coordinates to create the surface of the 3D object.

Answer 1

[Matt J]

Use freeBoundary

[Alberto Acri]

Thank you for the answer. Is it possible to use this function even if I don't know the connection between the nodes?

[Matt J]

If you don't know the connections, then the boundary is not defined. You would need some other assumption, like that the shape is convex or something along those lines.

[Matt J]

You could of course consider using something standard like delaunayTriangulation to auto-connect all the points, but only you can know whether that choice gives the connections that you would want..