Full Version: Polygon to Moi what are some best practices?

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Hi Matadem,

re:
> Another question...what about if it is not a sub D object?
> Like just polygons and I want to bring it into Moi for let say Boolean operations?
>
> Should it go thru meshmixer like Pilou indicated?

For non sub-D meshes, I would recommend to not try to import that type of data into MoI.

Generally it's better to edit polygon mesh data in a poly modeling program, not in MoI.

There may be exceptions for specific types of models, it would help if you would give an example file.

- Michael

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Not to hijack a thread, but I often find myself needing to import a polygon mesh into MoI just to use as a 3D reference. I'm often given 3D files by clients that I need to make a part to fit accurately in MoI, or to remodel the whole thing as NURBS, and currently there's no easy way to do this. It would be great for me if I could just import a polygon mesh even as a pretty much un-editable, otherwise useless object, just to use as a 3D reference for remodelling. There's only so much you can do (and so much accuracy you can achieve) with screenshots from each side, or extracted 2D curves imported from a polygon modelling software

Or I've modelled 2 parts of an object, one in Blender and one in MoI, that need to fit together and I just need to check fitment and scale etc

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Hi DanC, for use as a visual reference you can use the OBJ23dmWireframe converter utility program, from here:

https://moi3d.com/wiki/Resources#Obj23dmWireframe_converter

That will convert an .obj file containing polygon mesh data into a wireframe .3dm file which can then be opened by MoI.

- Michael

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Good day..
I am working on something like this...not sub d
I was thinking of importing and perform exact booleans in Moi

I am still getting used to this kind of modeling...

Image Attachments:
demo.JPG 

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Hi Matadem, if that's not sub-d then I would not recommend trying to bring it into MOI.

Your model data will be made up of a lot of little planar fragments.

If you then apply exact booleans your result will be a weird mix of a faceted main body and smooth only on the cuts you apply in MOI.

The main way that it could work would be if you constructed the body as a sub-d model in your poly modeling program. Then the main body would be a smooth surface in MoI after you convert it from sub-d.

- Michael

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Understood.

Thanks!

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Thank you Michael, I'll check out that converter

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For future reference and if I am not mistaken, here are the commands (some custom/third party) used in that video :

- "_importobj" (third party) to bring in a .obj control cage without subdivision. If it fails because of unsupported geo, subdividing the object once before import can bypass the issue.
- "_Subdiv_beta9" (also third party) to control the smoothness of subdivision
- "ImportSubD" (stock) to import a .obj with subdivision and reconstructed surfaces
- "pastepart" (stock) to place parts on surfaces.

For the third party import and subdivision scripts : https://moi3d.com/wiki/MaxScriptArchive

I hope this helps !

Image Attachments:
_importobj _subdiv_beta9 pastepart tests.png 

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Show messages: All  1-12  13-20