[Feature Request] Add support for Rhino3D files

[freecad]

[Feature Request] Add support for Rhino3D files

[KeithSloan]

Probably not fully but my ImportNURBS workbench can read Rhino3D files. An inhibitor to further development is that you cannot do much with them other than display them. I am not aware of any of workbenches for dealing with NURBS allowing for editing, they all just allow you to create, each with their individual methods of creation. I raised an issue with the Curves Workbench see tomate44/CurvesWB#59.

Not sure but I think some people have imported 3DM files and then used the Path Workbench (this is unconfirmed).
If there was the facility to edit Nurbs then there would be an incentive to add export facilities.

Maybe a GSOC project but would need Chris_G or somebody to mentor.

[KeithSloan]

Made a start on new exporter Module https://github.com/KeithSloan/ImportExport_3DM

see https://forum.freecad.org/viewtopic.php?t=22675&start=1820#p749032

It is a start Sweep_Rotation (BSpline curve )from file LogSnail_4 exported tp 3DM and opened in Rhino

[luzpaz]

CC @KeithSloan

[maxwxyz]

Is this still a relevant request?

[KeithSloan]

Well the ImportNurbs Workbench https://github.com/KeithSloan/ImportNURBS has 10 stars and there were 28 clones in the last seven days. github users that have stared sometime in the past are

But at the end of the day what is required is the ability to edit and alter the imported curves and surfaces, maybe a future curves type workbench?

Then is would be worth while adding support for export of Nurbs.

There is no Open Source equivalent of Rhino and if the ability to edited such curves and surfaces was created then FreeCAD would acquire quite a number of users.

[yorikvanhavre]

An additional note, the openNURBS library, which is used to import/export Rhino files, is GPL licensed. So it will likely never be a core feature of FreeCAD because we don't want pure GPL code in, but rather an add-on.

Long time I didn't play with your importer @KeithSloan ... Should give it a new test spin

[KeithSloan]

Rhino allows modelling through creation of Nurb curves and surfaces for some incite of what this enables see https://mcneelmiami.hflip.co/4ae71071b2.html