I am trying to add edge loops along the length of the object.
But somehow Fusion subdivides three of the selected sides as intended and the 4rth one in the opposite direction.
T-Spline subdivision oddity (bug ?)
Curious, was this an imported OBJ that was converted to a T-Spline?
Phil Procario Jr.
Owner, Laser & CNC Creations
No, this was done in Fusion 360. When reading this thread about a lead screw assuming it was going to be 3D printed as in the image shown in the thread.
The video shows how something similar is done in Autodesk Inventor.
My idea was that I should be able to do this quickly with a T-Spline and Soft Modification enabled. It does work, BUT...
I find T-Spline modeling in Fusion really cumbersome in places, which yielded these two ideas in the idea station:
The latter one is already implemented, just not obvious and inconsistent with other parts of the Fusion 360 UI. Once you know where to click it's fairly intuitive to use.
Adding ege loops, however, I've found to be a real hassle in Fusion 360. It is just such a basic necessity when modeling with quad meshes but so cumbersome to do.
Many of the basic things, like a knife tool are missing, I could make good number of animated gifs with fairly basic stuff that woud speed up modeling.
I tried to reproduce this using just T-Splines and was unable to that's why I asked.
There are so many tools that could be added to T-Splines the list for me is just too numerous to list....
I wouldn't count on seeing new T-Spline tools any time in the near future and now with the new mesh space there will be even more disconnect between meshes and T-Splines.
On top of that T-Splines are more unstable now then they have ever been. 2 crashes yesterday and one so far today.
Phil Procario Jr.
Owner, Laser & CNC Creations
Not sure about you but I'm seeing everything is more unstable now....could this last release get any worse......
Phil Procario Jr.
Owner, Laser & CNC Creations
I've recently seen some crashes in patch mode and T-Splines as well. But I cannot say if it's more or less than before as I am trying things out I had not tried before.
Well given the fact that I use T-Splines more then anything else in Fusion I can honestly say that T-Splines are no longer happy campers....
Phil Procario Jr.
Owner, Laser & CNC Creations
Hi @TrippyLighting,
I tried to reproduce it however I was unable to do it.
To better understand your issue, could you provide me your sample file?
And then after looking into your model, If it reproduce it, I'm going to ask the development team.... 
Sorry for the inconvenience.
Many thanks!
Attached is a .f3d file I just created with the same problem. It is easily reproducible for me and fails every time.
I am wondering if this is a mac specific problem.
My machine specs are these:
Its not Mac specific, when I use your file I get the same results.
Phil Procario Jr.
Owner, Laser & CNC Creations
I figured out why it is happening to you and exactly where the bug exists.
You used the box primitive in T-Splines and because of that this bug shows up.
If you create a sketch and extrude it then the face tool to cap the ends it works like it's supposed to. I can make a screen cast if the Dev team doesn't understand what I'm saying.
This is one of the reasons I don't use the primitives anymore in my T-Spline work.....
Phil Procario Jr.
Owner, Laser & CNC Creations
@PhilProcarioJr You are correct. I did use the box primitive, something I do only rarely and when I am feeling lazy 😉
For the actual workflow I was going to have put together I would have had to use a sketch and would not have encountered this ..bug (?)
I always use sketches to make my T-Splines....ALWAYS unless I am importing an obj file...
Primitives for lack of a better word...suck
Your using T-Splines in a parametric environment.........
Phil Procario Jr.
Owner, Laser & CNC Creations
Looks like the sub-div code in T-Splines got a bug
It produces not optimal and usable mesh structures.
https://drive.google.com/file/d/0Byzv_NlyKp_2SERUY3piR3ZMcHM/view
https://drive.google.com/file/d/0Byzv_NlyKp_2WkFpNGlIU2FqcWs/view
@TrippyLighting I know T-Splines since it was in Maya then Rhino. It is a fantastic tool but the speed and inability to extrude edges only faces makes it often not very usable in my point of view
when you have access to better and more powerful sub-d modelers.
Something I truly love about TS is the ability like with NURBS to insert a new loop cut and readjust all others so you maintain the original surface flow - that's pretty genius.
The Sub-D systems in other cad apps are also pretty fast so T-Splines need to catch up here actually. They had once the cutting edge and now they are a tick behind actually.
While I found the resulting NURBS patches having different mesh densities across the board.
Claas Kuhnen
Faculty Industrial Design – Wayne State Universit
Chair Interior Design – Wayne State University
Owner studioKuhnen – product : interface : design
So I tested three apps I have access to
Shark FX (Related to Ashlar Cobalt) Fusion 360 and MOI
The patch layout is interesting.
Shark does something uneven at the lower right bottom
Fusion is simple
MOI splits the body more
They also have interesting CV and isopram layouts.
Shark FX having the heaviest mesh but evenly subdivided
Fusion 360 has a many details along surface edges
MOI is the one with the slimmest CV count
A close look at highlights showed that Shark and Fusion look similar while MOI has some noise in the highlight edges
Testing for G2 everybody fails while Shark claims to have G2 - nope!
Most interesting is that G1 even fails left and right with Shark but this could be maybe my Alias setting.
MOI and Fusion are fine.
Moi also has some other issues for example the wing tips are different.
So it seems to me that Fusion vs those apps beats them in quality and smoothness (+ timeline) while I am not sure how Fusion would compare to ProE and Simens NX or Catia.
But those are in a different price level!!!!
Claas Kuhnen
Faculty Industrial Design – Wayne State Universit
Chair Interior Design – Wayne State University
Owner studioKuhnen – product : interface : design
What purpose would a comparison of Fusion 360 with two applications serve that are so solidly inaccessible for 90% or more of the Fusion 360 audience.
What I would like to head off with this question - whatever the results of such a comparison might be - is a bashing of Fusion 360 by folks that mainly don't have to pay for the sophisticated software tools they have the priviledge to be provided with by the organizations they work for.
If the basis of this question is simply out of curiosity I am with you!
@Anonymous Thanks for the comment! We have NX in the engineering labs - I will load the file there and see.
Claas Kuhnen
Faculty Industrial Design – Wayne State Universit
Chair Interior Design – Wayne State University
Owner studioKuhnen – product : interface : design