Steiner tree problem

[ValeryOchkov]

One simple task with 4 points - see the video here.

See the screenshot:

See the physical model of this problem (Steiner tree problem😞

[ValeryOchkov]

I would like to see same video for 5, 6 etc points

One animation for 5 point - see here

[ValeryOchkov]

One practical example of this task - a cable for 2 houses - see here

[ValeryOchkov]

Do you know a shorter way for this 8 points (tops of the cube):

[ValeryOchkov]

See http://communities.ptc.com/videos/2617