SubD examples and models

pilou

From the Topmod ?
No Problem

thomthom

Here is the result of the OBJ imported using QuadFaceTools:

Notice that it has less triangles than your original import - this is because the QFT OBJ importer will ensure non-planar quads are created as QuadFaceTools quads. In in turns makes it better for SUbD.

You can see that under the hood there are still triangles in SketchUp - but for the sake of QFT and SUbD they will be treated as quads.

HornOxx

Hi All
I've finally found the time, to install and start SubD, which runs very well so far and I love it already. I am glad as well, that SubD is finally here and has caused all these contributions which are great, even funny and educational all together.

Now I'm working my way through all your contributions and the exercise models that you have posted here. Cotty and all the others - thank you all for posting them!!!

I understand why it is better to use quad faces instead of triangulation, even if I'm light years away to understand the connections to (for example) Quadfce tools and how or when to use these additional "Quad" tools - I´m starting to learn :- ))

Here is a first simple question
I show an example of Cotty - How is it possible to get this shown SubD-quad-mesh visible?
(I see the creases only and when I activate show hidden geometry, I see the creases and the triangulation of course)

cotty

Unsmooth quads from the quadface tools for the group:

HornOxx

@cotty said:

Unsmooth quads from the quadface tools for the group

I see the Quads !!! :- )) Thanks Cotty

cotty

May the quads be with you!

cotty

SCF_Cotty_subd23.skp

pilou

@unknownuser said:

this is because the QFT OBJ importer will ensure non-planar quads are created as QuadFaceTools quads

Sorry I don't see "Import OBJ" on the menus of QuadFaceTools(0.9.1 & 0.9.2) ?
Only "Export" ! (SU Make 2016 2015)

Box

I've never ventured much into the realm of furniture making so as a first quick doodle I'm impressed by the ease with which I came up with something almost recognisable in less than 30 minutes fiddling. No doubt I could render it and make it look flash, but I love the raw topology.

sofa rough.JPG

HornOxx

Hi - to get any first experiences I did a little testing, mainly based on Cottys SubD_04 model above. I was interested on how an existing texture behaves to the SubD process - it's amazing how confidently and fast that works ...

Cotty, how did you get this rainbow-colour on that subd23 chair which looks so great - is it texturing?

04 r.jpg

zipped skp2015 file

used texture

cotty

Nice! Here's the chair texture...

thomthom

@pilou said:

@unknownuser said:

this is because the QFT OBJ importer will ensure non-planar quads are created as QuadFaceTools quads

Sorry I don't see "Import OBJ" on the menus of QuadFaceTools(0.9.1 & 0.9.2) ?
Only "Export" ! (SU Make 2016 2015)

Ah, yea, the docs probably don't mention this at all, but it's listed among the other importers:

File > Import

The only reason the exporter isn't among the other exporter is that the API is lacking the interface. Them guys over at SketchUp should fix that! ...oh wait...

thomthom

@box said:

I've never ventured much into the realm of furniture making so as a first quick doodle I'm impressed by the ease with which I came up with something almost recognisable in less than 30 minutes fiddling. No doubt I could render it and make it look flash, but I love the raw topology.

It makes me very happy to hear that. My biggest concern with SUbD was how it relied on quad topology and I wasn't sure how well that requirement of workflow would be received in the realms on SketchUp.

thomthom

@hornoxx said:

Hi - to get any first experiences I did a little testing, mainly based on Cottys SubD_04 model above. I was interested on how an existing texture behaves to the SubD process - it's amazing how confidently and fast that works ...

Thanks for sharing that model - it's a nice study of geometry and texture.
At the moment SUbD use simple linear interpolation for the textures. However, I am working with integrating OpenSubdiv into a future release. That will give more options for textures;

Source: http://graphics.pixar.com/library/Geri/paper.pdf

pilou

@Thomthom

In fact all works fine!
It was half my fault! I was too confident of the first reading text!

cotty

pilou

Tron!

pilou

Glitch ?

SUbD finds internal faces and can't be apply! (Who don't exist)
(Artisan subdivides

subd_glitch_v6.skp

thomthom

SUbD Catmull-Clark algorithm require the mesh to be a manifold or a surface without any forks. That model you have there have an edge with four faces connected - the algorithm cannot handle that. In another modelling package where the entities didn't merge you'd get away with it as you could have overlapping edges. But since SU merges entities at all times these types of scenarios becomes a challenge.

OpenSubdiv 3 supports internal faces - maybe it would be able to cope with this as well - I'm not sure. But that's still down the line in the road map.

Box

It would be handy if either SubD or Solid inspector could highlight these annoying joints. They can be a real headache to find manually sometimes.