why polyline in cad turn out to be open polysurface?

Replies to This Discussion

Permalink Reply by David Rutten on December 21, 2014 at 2:57am

Since this seems to be a DWG -> Rhino problem, you're probably better off asking on our discourse forum. That's where all the Rhino support happens.

Permalink Reply by studyrhino on December 21, 2014 at 3:26am

i had posted this to http://discourse.mcneel.com/t/why-polyline-in-cad-turn-out-to-be-op...

Permalink Reply by Luis Fraguada on December 21, 2014 at 3:37am

You want to ignore thickness:

Permalink Reply by studyrhino on December 21, 2014 at 4:08am

Thanks a lot, problem has been solved, that's great!

Permalink Reply by Hyungsoo Kim on December 21, 2014 at 4:11am

Your polylines in cad file are not real polylines. They are already polysurfaces.

You can change thickness to 0 and explode polysurface in autocad and export to rhino.

Permalink Reply by Luis Fraguada on December 21, 2014 at 4:18am

This is incorrect.  Typically the issue arises from Line weight / line thickness in AutoCAD.  If a curve in a dwg is specified to have a line thickness, it will come in a a srf or polysrf in Rhino unless you ignore the thickness on import.

Permalink Reply by David Rutten on December 21, 2014 at 4:28am

Weird... since Rhino supports line width attributes. Oh well, learn something new every day, thanks.

Permalink Reply by Luis Fraguada on December 21, 2014 at 4:42am

One of the things that has always surprised me about Rhino is the lack of support for line thickness in the viewport ala AutoCAD.  The settings (object or layer) are only used when creating a Print from Rhino.

Permalink Reply by David Rutten on December 21, 2014 at 5:30am

Yeah, I've put the 'PrintDisplay State=On Enter' command in my startup command list. 

Permalink Reply by Hyungsoo Kim on December 21, 2014 at 5:09am

Hi. Luis.

You are right. I just point out this original cad file's status.

As far as rhino's concern,  poly-line has a thickness & weight has no difference with polysurface.

Permalink Reply by studyrhino on December 21, 2014 at 6:03am

thanks!