Imported Polysurfaces from Rhino-to-Autocad-to-Inventor

eucci
Advocate

Imported Polysurfaces from Rhino-to-Autocad-to-Inventor

eucci
Advocate
Advocate

I I have a dwg that is exported polysurfaces from Rhino. It opens fine in Autocad. But will not properly import into Inventor. What could cause this?

 

See link to associated discussion here:

https://forums.autodesk.com/t5/inventor-forum/rhino-to-inventor/td-p/13270256

 

eucci_0-1737308803703.png

eucci_1-1737308831779.png

eucci_2-1737308882731.png

 

 

 

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Accepted solutions (2)
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Replies (9)

kacper.suchomski
Mentor
Mentor

Hi

I would consider exporting to STL format and then processing the mesh - either manually in Inventor or semi-automatically in Fusion.


Kacper Suchomski

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eucci
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kacper.suchomski,
This is part of an overall architectural model that is quite expansive. An
STL conversion would be unworkable at an architectural scale.

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kacper.suchomski
Mentor
Mentor

Why do you think it is impossible? 


Kacper Suchomski

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eucci
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I did not use the word “impossible”. 
Converting an entire civic structure, in full detail, to triangulated meshes, to then attempt to convert it back to nurbs based geometry is a tremendous undertaking. I’m looking to understand why this particular file is behaving in a way that is unlike any other rhino file I’ve dealt with. Additionally, I’m looking for perhaps a plug-in or efficient workflow for this conversion.
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James_Willo
Autodesk
Autodesk

Hi, did you try just importing directly to Inventor?

 

There's also a Rhino data connector if you want to use the cloud through ACC.

https://help.autodesk.com/view/DATAEXCHANGE/ENU/?guid=rhino_dex

 

 



James W
Inventor UX Designer
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cidhelp
Advocate
Advocate
Accepted solution

Hello @eucci ,

 

try moving all objects in AutoCAD to the origin and scale all objects with factor 1000 (m -> mm).

After that, import the DWG into Inventor (use mm as unit) and it looks like that:

cidhelp_0-1737361701535.png

 

eucci
Advocate
Advocate

cidhelp,

Thanks for the input! I was thinking that it was a scale issue.  I think that identifies the cause of the issue. However, I cannot move the geometry. It needs to stay in the project coordinate sysytem. I can open the .3dm file directly. But, I'm still getting the the same result (image below) with units set to meter. For some reason, INV is scaling the gemetry correctly. It just has this bazaar jagged graphic look.

 

Link to rhino file below

 

https://www.dropbox.com/scl/fo/0g0djfgtx8tk6n28a5r7y/AC9ga8t2zq5-t7QQsXizT3k?rlkey=za0o6hajy2slqahaz...

 

eucci_0-1737377206923.png

 

 

 

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eucci
Advocate
Advocate

I am noticing that the geometry and scale is actually correct in the imported parts. But there seams to be a graphical error. When I scetch on one of these jagged looking parts the projected profile and scale are correct.

eucci_1-1737377662056.png

 

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eucci
Advocate
Advocate
Accepted solution

cidhelp,

Thank you very much for your input. It turns out that the problem was caused by the geometry being too far from the origin in the model. I ended up having to move the model to the origin. Once I did that the geometry opened up just fin ein Inventor.