Suitable masking for a simple tube

[Durval]

I'm trying to create a closed, continuous tube without interruption.
To do this, I want to hide the line behind the Xs in the top picture.
If I remove '+16+32' from the TUBE masking, I eliminate that line by removing the initial and final edges, but I end up eliminating another line that I must keep: the one that appears in pink in the second picture.
I hope there is a masking combination that allows me to do this easily, is there?
By the way, what does "edges participate in line elimination" mean? (GDL Reference Guide, about the "TUBE" command)

This is the 3D text:

PUT -base_ovh, 0, 0, !---- profile
wall_thk, 0, 0,
wall_thk, base_height, 0,
-base_ovh, base_height, 0,
-base_ovh, 0, 0,

prof_nsp = NSP
PUT 0, 1, 0, 0, !--- path
0, 0, 0, 0,
A, 0, 0, 0,
A, B, 0, 0,
0, B, 0, 0,
0, 0, 0, 0,
1, 0, 0, 0

path_nsp = (NSP - prof_nsp) !--- quant. of path coordinates
TUBE prof_nsp/3, path_nsp/4, 1+2+16+32,
GET(prof_nsp),
GET(path_nsp)

[runxel · Accepted solution]

What you want to achieve is not possible this way. The TUBE has no concept of "up" or "down", since the cross section could be of any shape, so that's why you can only disallow contour lines for the whole cross section.

I suggest you change the path so the endpoints meet somewhere in the middle and not in a mitering position.

[Durval]

Good idea! Thank you runxel!