Match Srfs Tangents / Loft with Interior Edge

I´d like to loft some crvs to a srfs and match the tangents, so if I mirror (xy/xz) I´d have a continous tangency.

Usually I´d extend the loft to a couple more crvs and trim the srfs afterwards again. Here this doesn´t work, because it would cause an interior edge (in best case).

Someone has an idea, how to solve this?

Attachments:

impossibleloft.gh, 23 KB

Replies to This Discussion

Permalink Reply by Chris Tietjen on December 7, 2012 at 9:25pm

A couple of Sweep_2's; a couple of Trims; Network Srf (maintain Tangency); Mirror.

Attachments:

TangentSeam.3dm, 205 KB

Permalink Reply by phillip on December 8, 2012 at 4:57am

Hmm. I was more looking for a way to inegrate something like a BorderTangency into a single surface native in GH.

Permalink Reply by Chris Tietjen on December 8, 2012 at 7:25am

I couldn't see how you could get tangency with your given line set and lofting so I just started looking for a way to get it by any method. Why does the surface need to be generated by a loft?

Permalink Reply by Igor on December 9, 2012 at 12:40am

Take isocurves from both surfaces from one edge to another in same directions, evaluate this curves at the

start/end, with start/end points and tangent vectors make BiArcs (or BlendCurve). Loft this BiArcs and you get the blend surfaces... or join BiArcs with isocurves and rebuild surface by lofting...

Permalink Reply by phillip on December 12, 2012 at 2:22am

Thanks Igor!

Since I´d like to keep the lofting direction, I´d need to divide crvs again and then loft by divisions could work I guess. A little to much rebuilding for my feeling, though.

But since this is not really urgent, I think I will just wait for David to release Networksurface.

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