select connected 3d polylines to make fitting or top

[giulio1962]

I know already that there is no way to make a chord (fillet) or top (chamfer) on a 3d polyline. It is not a problem because the explosion and so become simple lines and I can do this by selecting two lines at a time without problems.
the problem is that often these lines are so many and I would like to find a way to do so by selecting them all once with a window.
can you suggest a lisp that can make a connection (or top) of multiple connected lines without selecting them individually, but selecting only one window that unites them all?

 

[smemo]

command pj
if you select multiple connected lines convert only the selected ones, otherwise selecting a single line converts all connected lines

 

[giulio1962]

command pj
if you select multiple connected lines convert only the selected ones, otherwise selecting a single line converts all connected lines

I thank you for the answer. but this lisp does not solve the problem I explained. the lisp you put polylinejoin, allows you to combine multiple lines that are located on a horizontal plane in a single polyline. but the polylines do not allow to move on the axis z. if you try to use this lisp on united lines that move on the 3 axes x y z you will see that it does not work, precisely because the polylines cannot move on the three axes.
I already have a polylinea 3d (made with command 3dpoli) but you can not make top or chord on 3d polylines (as you can do on a 2d polyline). then explore it and then make the connection (or top) by selecting two to two .
if one connects and then adds "_c" autocad allows to open the window, but it still requires the selection of only two lines, so I would need a lisp to allow to select more lines drawn in 3d (or 3d polylinee) and make the connection of all together.
Say hi.

 

[GP.]

per il raccordosee if it works, non does no verification (such as the applied radius set).

 

[giulio1962]

That sounds perfect. That's exactly what I was looking for. maybe you can also change in the future to make even top (chamfer), in any case it is already great so. Thank you very much.
Greetings to everyone.