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paullim

Rhino/Step imported solid is hollow

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I've got a marionette workflow that uses vs.IntersectSolid to identify points within a solid object.  It works totally fine with a solid made in vectorworks.

 

In order to get a better shape, I got it made in Rhino. When I import the Rhino file (3DM, IGS, STP, X_T), the imported solid is hollow, i.e. when i do a solid subtract you can see right into the inside of the object.  This means that it seems to only be the skin layer of the object that is imported. This makes the vs.IntersectSolid function non-functional because it only intersects with the edge and not the interior.

 

Can anyone help with how to fix this?  I've tried Stitch & Trim, but it only works with the IGES file where the surfaces are imported as individual NURBS, however the solid created is still hollow. Is there any way to tell if there is a hole somewhere in the object that is preventing it from being a solid?  It's showing as solid in Rhino with no holes.

 

This is IGS version with simplified surfaces, removed the NURBS to see if that made a difference:

https://www.dropbox.com/s/onheezc3b5lv2vs/Triangulated_Volume.igs?dl=0

Attached are a couple of versions of the Rhino file.

 

Thanks in advance!

 

Paul

 

Trimmed_Volume_v2a_RB.3dm Rhino_4.3dm

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Rhino is a Surface Modeler meaning it only creates the surface and does not create the internal objects.

 

I don't know enough about Rhino to know if there is something you can do there to make the object a solid.

 

In VW, you could try and Convert to Generic Solids. That might give you the interior solid that you need for your Interest Solids to work.

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all models that we do in rhino are surface only, like pat mentioned.

the only format that worked for me is to export as 3ds. then in vectorworks you´ll get a polygon model as mesh.

when you do boolean operations the substracted faces appear as volume.

Bildschirmfoto 2020-11-25 um 09.59.47.png

Bildschirmfoto 2020-11-25 um 09.59.40.png

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right, that works too. but i often had problems with the settings for the crease angle and sometimes geometry was double sided. that´s why i use 3ds 😉

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