Grasshopper

algorithmic modeling for Rhino

why polyline in cad turn out to be open polysurface?

when i import a cad file(.dwg) into rhino 5 SR9, the polylines in cad turn out to be polysurface and grasshopper tool geometry pipeline just can't get those polylines, what should i do to solve this problem?

thanks for advise.

rhino 5 SR9

grasshopper 0.90076

pic01: import settings

pic02: polyline turn to be polysurfaces

pic03: grasshopper geometry pipiline can't read anthing

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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.

You want to ignore thickness:

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

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.

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.

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

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.

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

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.

thanks!

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