Newbie question: How do I sort Section Curves for Sweep2?

My curves are not swept in the proper order - in fact they result in multiple srfs.

This is probably a list/tree issue? I'm a whiz with Rhino, but GH is very new to me. .3dm and .gh attached.

tx,

Attachments:

surfboard.gh, 20 KB
Surfboard_hardCorner.3dm, 77 KB

Replies to This Discussion

Permalink Reply by Declan Halpin on November 2, 2013 at 7:39pm

Ok, looks like I've fixed one problem. By inserting a Flatten Tree component, I was able to get my Sweep2 sections to behave. Now I have 2 more problems/questions:

1 - How do I get Sweep2 to use a point as an end section (like in Rhino's command line option, "Point")

2 - Is there a FitSrf component? I want to mimic the "Fit with __ points" option that Rhino gives me in the standard Sweep2 popup window.

If anyone can help, it'd be GREAT! I'm 90% through a very satisfying definition!

Permalink Reply by David Rutten on November 2, 2013 at 7:48pm

The Sweep component in Grasshopper doesn't have inputs for points, however you can create zero-length line segments that act as points:

David Rutten

david@mcneel.com

Seattle, WA

Attachments:

sweep.gh, 8 KB

Permalink Reply by Declan Halpin on November 2, 2013 at 7:44pm

Also, if I use a Srf edge as a rail in a new Sweep2, how do I set Continuity?

Permalink Reply by David Rutten on November 2, 2013 at 10:08pm

You can't, sorry. Grasshopper only supports curves as rails and there's nothing you can do to 'trick' GH into taking surface tangency or curvature into account.

David Rutten

david@mcneel.com

Seattle, WA

Permalink Reply by David Rutten on November 2, 2013 at 10:10pm

In fact it seems that the Rhino SDK method which exposes Sweep functionality doesn't provide a way to use surface edges and continuity so you can't even solve this using a VB/C#/Python script.

David Rutten

david@mcneel.com

Seattle, WA

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