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From: overthere
Hi Michael,
For the SubD conversion feature is it expected behaviour that when the NURBS objected generated has a boolean subtraction performed on it in MOI the edges generated from that can't be filleted without errors?
I'm trying to work out if I'm making a mistake or just expecting too much from the feature.
Thanks
Andy
From: Tover (TOVERMORAN)
Hi Michael,
thanks for the detailed response! Sorry, I hadn't got deep enough into the docs yet. The construction lines function is such an elegant approach to this concept.
Rock on,
T
From: Michael Gibson
Hi Andy,
> For the SubD conversion feature is it expected behaviour that when the NURBS objected generated has a
> boolean subtraction performed on it in MOI the edges generated from that can't be filleted without errors?
> I'm trying to work out if I'm making a mistake or just expecting too much from the feature.
Well it depends on the situation. In general that is not expected, however also filleting in MoI can have problems with complex chaotic geometry and it is pretty easy to have complex chaotic geometry with SubD conversions.
Is it possible for you to post the model so I can take a look at it? If you want to keep it private you can e-mail it to me at
moi@moi3d.com, if it is very large you would need to use a file sharing service like Dropbox/OneDrive/etc... and send just a shared link through e-mail.
- Michael
From: Lordfox
Helo dear Micheal & dear users of Moi3D 4.0 (beta) ...
Is it possible, to import an OBJ too but without SUB-D?! Any possibility to set the strength of the build-in-SUBD? And for some OBJ Objects I dont want have SUBD ... e.g. if I import a pose from DesignDoll - nice tool for posing, but the poly-mesh-structure is very weird, lot of tris and so on - SUBD will not work well or much too long.
I try also the old MaxSmirnov Plugin _ImportOBJ it still works in 4.0 too, but in my eyes not very perfect, because if I import with _ImportOBJ the edges of each polygon are not welded, they are naked.
From: Michael Gibson
Hi Lordfox,
> Is it possible, to import an OBJ too but without SUB-D?!
Sorry, no not with any built in tools. An OBJ file without Sub-D is a faceted polygon mesh model and MoI is not designed to work with that kind of data for modeling. You would need to use a polygon mesh modeling program to import and work with that type of data, not MoI.
> Any possibility to set the strength of the build-in-SUBD?
Sorry, no not currently, it just uses the standard Catmull-Clark approach. At some point in the future I do want to add some edge weighting options but that would be unusual to do that directly in the OBJ importer.
> And for some OBJ Objects I dont want have SUBD ... e.g. if I import a pose from DesignDoll - nice tool
> for posing, but the poly-mesh-structure is very weird, lot of tris and so on - SUBD will not work well or
> much too long.
That model data is just not suitable for use in MoI in general - it's not what MoI is focused on working with.
- Michael
From: Lordfox
Hi, thanx ... but it runs good - the new SubD fuction - I have made some bevels in a polygon-modeling tool. Thank you so much. But one Polygon-Object I cant load with the SubD Tool. I dont know why, its very simple, no holes, only quads (754 Vertices) ... hmmm I dont know .... created in Silo 2.5.5.
http://www.mediafire.com/file/h04eys1g8e9mtc4/Rohr.obj/file => Rohr.OBJ thats the Missing Part
This OBJ I can also create in moi very easy and fast ... but please tell my, why I cant load.
Looks very well
https://i.imgur.com/gf9b82j.jpg
The guy I dont want import by SubD, but I can't import the thing between the seat and the ground. Im confused. Maybe a bug in the Beta Release? Or an issue with Silo?!
From: Frenchy Pilou (PILOU)
Ok That works with Wings 3D! ;)
(ps when you have such single object put it at the origine and not at the out of space! ;)
But your file has curious colors in some other free prog MeshLab, MeshMixer...
Here the OBJ...http://moiscript.weebly.com/uploads/3/9/3/8/3938813/rohr4.obj
And for this simple object you have better time to redraw it in Moi! ;)
Because 2 Millions polys at Maximum export is maybe not a cool deal! :).
And seems your model has some defaults...
From: bemfarmer
The two ends of the tubes have triangles, and T vertices.
By importObj script, and splitting the ends triangles, and saving, the tube will subD, but the ends are still polygons...
- Brian
From: Lordfox
@Pilou
I dont understand, why you see 2 Million Polys? But thanx, I will try out other pivot-settings.
@bemfarmer
thank you too - so I will take look to this too
I'm happy now .. it was my fail - did overwork the tube-ends. Now ist fine ...
https://i.imgur.com/ByHQ19d.jpg
From: Frenchy Pilou (PILOU)
When you import it by SUbD inside Moi
then export it as obj you have a choice to 67 000 (mini) to 2 000 000 polys (maxi) ;)
From: Michael Gibson
Hi Lordfox,
re:
> But one Polygon-Object I cant load with the SubD Tool. I dont know why, its very simple, no holes,
> only quads (754 Vertices) ... hmmm I dont know .... created in Silo 2.5.5.
It's because there are errors in the mesh structure, some degenerate faces and some faces with inconsistent normal directions.
The Rhino check command says:
quote:
This is a bad mesh.
Here is what is wrong with this mesh:
Mesh has 4 degenerate faces.
Important things to consider with this mesh:
Mesh has 128 faces with directions different from the mesh as a whole. Although this does not
necessarily mean that the mesh is bad, it can cause problems if you're doing mesh boolean operations with it.
Mesh has 4 pairs of faces that intersect each other. Although this does not
necessarily mean that the mesh is bad, it can cause problems if you're doing mesh boolean operations with it.
You may be able to fix it by using the "unify normals" tool in Silo:
https://nevercenter.com/silo3d/wiki/index.php?title=Unify_Normals
In the next v4 beta which should be released just later today, the sub-d conversion will skip over the problematic faces and give this result:
- Michael
Image Attachments:
lordfox_subd_import.jpg
From: Lordfox
Thanx ;) - so its a problem of silo, wrong faced polygons in silo sometimes black and I see it and I fix it, but in somtimes my silo-object looks clean and the wrong polygon(s) are not "black" in silo.
I will set a wacom key, that makes all faces unify and after this a save.
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