(for some reason, I missed the first part of this thread...)

So, How does T-Splines and Power Sub-D NURBS compare and differ?

Could it be that aside from T-Spline's innovation with the ability to form joint intersections (start-points, tri-points), the "cage" modification is really an implementation of Sub-D? People may consider the novelty of T-Splines for its ability to act like a Sub-D platfrom, and may believe that it is only possible because of the T-intersection concept.

What this may mean is that people shouldn't be wishing for T-Splines (per se) in their NURBS application, but the ability to work an enclosed NURBS (water tight) solids by means of a Sub-D type cage system.

"Sub-D style cage", not to be confused with a "FFD deformation cage" that is on the MoI wish list. ;-)

None the less, T-Splines and Power NURBS products are pricey plug-ins for the non-commercial user.

Hi Mike,

> So, How does T-Splines and Power Sub-D NURBS compare and differ?

Well, one difference is that they are each plug-ins to different programs - T-Splines is a Rhino plug-in and Power Sub-D NURBS is a Modo plugin.

They both have conversion capabilities for converting a sub-d cage into a set of NURBS surfaces.

T-Splines also adds a variety of sub-d modeling tools to Rhino in addition to the conversion tool - I think Sub-D NURBS is only focused on the conversion part, Modo has a full set of sub-d modeling tools in it already unlike Rhino.

- Michael

>>None the less, T-Splines and Power NURBS products are pricey plug-ins for the non-commercial user.<<

If the price of Power Sub-D NURBS was $300 - $400 range would have been more in line with my perceived
worth. ;) Probably still too pricey for non-commercial users, which pretty well describes CAD software in
general. (excluding MoI and a few others)

Ah... thanks.

And now with the new plug of Michael http://moi3d.com/download/Obj23dmWireframe.zip
you can make or take any polygons humans from any 3D prog (http://www.makehuman.org/ for free build your perfect hero! ;)
make some decimation http://meshlab.sourceforge.net/ and import it inside Moi!
No need Tspline or Subd surf ;)

And if you want a very free heavy complex model or a part of it (16 millions polys) so some decimation will be necessary!
Delete all the internal body! ;)
http://www.zbrushcentral.com/showthread.php?169189-Full-anatomy-model-free-download
By Nerveink

Hi PILOU


I guess by "make some decimation http://meshlab.sourceforge.net/" you can some how use meshlab to reduce the number of faces?

I've only used meshlabs to check for holes :)

Cheers, Stephen

""High quality edge collapse simplification (even with texture coords preservation)"" ;)

Conceptual Try with a Skechup Model :)
With the plugin obj3dmwire by Michael

My son asked if there was a way to take models from SketchUp into MoI... I didn't recommend it.


I like this: (modo power-nurbs site)

“Organic NURBS surfacing is no longer strictly the domain of T-Splines! Modeling in modo and exporting to your CAD package of choice is a powerful workflow. modo+NURBS; two great tastes that taste great together!”

– Branden Coker


Like a "Power-Reeses". ;-) Moi is the chocolate, of course.




This inspires me for a crazy Moi feature idea that is way too implausible to ever exist.

A command that can take two or more surfaces and rebuild them into a new single contiguous one (within reason). That way (Pilou), you could take the SketchUp models and smooth out those "polys".

wait, wait... If you export a multi-surface face NURBS into a poly/Sub-D modeler, apply a little smoothing, then Power-NURBS could work it's magic, and back to MoI. (the wheels turn)

< My son asked if there was a way to take models from SketchUp into MoI... I didn't recommend it.

Sure for an organic model but for other nature of object that can be possible :)

The OBJ export plugin for the free version of Sketchup (OBJ + Material)
By TIG http://forums.sketchucation.com/viewtopic.php?t=33448

Thanks Pilou... this plug-in will be worth experimenting with.

Hi Mike,

> A command that can take two or more surfaces and rebuild them into a new
> single contiguous one (within reason). That way (Pilou), you could take the
> SketchUp models and smooth out those "polys".

It is feasible to have a surface combine tool, but only for the case where 2 surfaces are touching each other along an "untrimmed" edge - meaning having each underlying surface touch each other.

If they touch at some kind of internal trim curve it's not very feasible to combine them together because every NURBS surface is made up of a rectangular grid of control points and it's not very easy to figure out some way to combine together 2 unaligned rectangular grids into one single rectangular grid.

- Michael

Hi Michael,

Just to chip into this subject, may be a little related, I was just wondering.
Does the geometry library have a kind of fit surface to point cloud?

-

Hi Danny,

> Does the geometry library have a kind of fit surface to point cloud?

Kind of but it tends to generate wiggly and undulating results, so it's not all that useful as-is.

Also it needs to be given a parameterization, basically an initial starting surface that is then basically deformed to interpolate the given points in the point cloud. The only really easy automatic starting surface is a best fit plane, but that doesn't work very well for point clouds that have some kind of complex 3D shape in them.

You generally can't fit just a single surface to some complex arbitrary point cloud as it may have various complex branches in it, usually such things have to be fit with a sequence of surface patches and not just one surface.

- Michael

"""""""""""""A command that can take two or more surfaces and rebuild them into a new
> single contiguous one (within reason). """""""""\

Well, thats basically what Power subd nurbs is doing here..... I called them and it can be licensed for something like $25,000 to start......

So, thats like 250 of us putting $100.00 into the kitty... Who's with me boy's!!!!!

lol

Hi Michael,

Thanks for the point cloud answer......curiosity satisfied, maybe one day.

@ Burr, sounds like a tempting invesment.....or a tax dedutable donation :)

Cheers

New Kid on the Block ;)



www.clayoo.com

Hi adamio, is Clayoo generating NURBS data now?

Previously it was only generating mesh data, see discussion of item #3 here:
http://www.clayoo.com/forum/topics/first-thoughts

- Michael

< plugin Sketchup export OBJ

A little remark : for me it's works only if you save your object .obj inside the folder "Plugins" of Sketchup else nothing append !

Correct is not there yet...