I am wanting to use the centerline of some imported geometry (simple constant circular sweep) to use as a base to start some surfacing I need to fit onto the imported model. Does anyone know if Rhino 6 has a function to do this?.. Maybe someone knows how to write a script for it?.. I can extract the wireframe mesh, but there is no centerline!!
It would be a wonderfully helpful addition to be able to do this with imported geometry, and give a very useful way to rapidly and accurately integrate with new geometry made in Rhino.
Hi Michael - if the object is a revolve, then the Cen Osnap will find the centers of any revolved edges - i.e. arcs for a partial revolve, circles for a full revolve (e.g. Line command, snap to the Cen of two circular edges.) - is that what you mean?
Ah - a pipe, not a revolve sorry, I misinterpreted - on that you can actually do the same kind of thing - the little circles have centers, and the arc shaped pieces have centers as well on the edge that is along the arc.So you should be able to piece together arcs and lines.
Hmm indeed - that’s new, this thing has been pretty reliable it seems to me … can you send me or post the object?
It’s working here…
Yeah, it does not like your object… I’ll investigate. Thanks.
@michael8 - the objects are blocks - use ExplodeBlock on them first. I’ll tune the tool up to either deal correctly with blocks or filter them at selection time. Also, I noticed that although the thing allows multiple selections, it only actually does one surface at a time, apparently I did not finish typing…
I just saw this…what method(s) do you use to figure out the centerlines? The plugin works, but it doesn’t work on 900 at once(generally simple capped cylinders, or some weirdly created surfaces that explode the cylinder into 2 surfaces) I could probably hack it out myself if I knew the apporach…it’s entirely possible I’ve done this already and just need my memory jogged…
Hi Jim - I will take a look - but as I recall the input is a face - it might be that handing it a pile of breps with multiple faces might confuse it - I’ll have a look .
Yeah, I busted something - thanks for the heads up, I’ll fix it…
For one thing, I see I am allowing but not handling extrusions… @JimCarruthers , @Giovanni_Ruotolo - updated above - see if that works any better…
Thanks that works, just as I was about to get my own working…the only issue I have is that the weird way whoever made these cylinders did it(artifact of DWG export and Import maybe?) I get 2 lines for each cylinder (that explodes into 2 semi-cylinders) and selDup doesn’t find them all…but that’s entirely unrelated. I wound up using my own for this job.
Hi William - this allows multiple selections and should ‘process’ them all in one go, but selection is still at the subobject level. It should be quite possible to allow polysurface selections.
