Hello all there! I just downloaded Moi and experimented with its tools a little bit. Its results are great in many cases, indeed. I met however, in the route, a problem which I could not be able to solve: how do we acquire filletings (or chamferings) in cases as the one in the attached image, so that there may be a smooth transition between all the cylinder shapes constituting the whole shape? The filleting (or chamfering) tools refuse to give satisfactory results in such cases (in fact in many cases do not give any result), So, What we do in such situations? How can we fillet intersecting each other boolen seam-edges as the ones in the attached image (the green colored edges) for example? Or what alternative ways can be taken in modeling such shapes?

Thanks in advance for any help...

Maybe like this ?

Thanks Pilou! So, that's to say that axes must not intersect each other in such cases -in filleting cases- I suppose. Is it so?

With Sphere & Cylinder there are sometimes little glitches! :)

When you have very complex forms to fillet you can use free Fusion 360 or Onshape! ;) Import Export Format Sat, Step, Iges...
https://www.onshape.com/
http://www.autodesk.com/products/fusion-360/free-trial Free for startups, hobbyists, and enthusiasts

Hi Dimitri,

i just created the object and only run once the fillet command, on the solid, to fillet all edges.



Regards
Stefan

Hello,

Trimming and Blending will work for more complex cases.

Hi Dimitri, can you please post the 3DM model file with your object in it? That would help to give any tips on what might be going wrong. Just looking at your screenshot it doesn't seem like it should be a problem to fillet but if for example your 2 crossing shapes were just slightly out of alignment with each other where 2 edges were crossing each other that could have created a tiny edge when they were combined and filleting can be sensitive to stuff like that. It's very difficult to see in a screenshot if you have a case like that though.

- Michael

So many answers! Thanks all! : - )

Pilou… thanks for mentioning the apps. I will look at them.

Stefan… it is strange to me, indeed, that you acquired such a shape so easily. I still have difficulties to acquire it with the first filleting attempt only.

OSTexo… you should make a tutorial… it would be very helpful, for sure. : - )

Michael… I will make some other tries too for detecting my possible faults in handling such cases and if the problem persists I will send you the files.

Thanks all again! : - )

Here a simple cylinder Copy rotate and axes rotated
before Boolean Union

After Boolean Union Fillets 1 unity are not possible in one pass! :(
but arc one by one yes! ;)


http://moiscript.weebly.com/uploads/3/9/3/8/3938813/cross_volume.3dm

Free Real time Render with Simlab Composer Light (max 1920*1080) (any format except nurbs 3dm from Moi : iges & stat are fine)
http://www.simlab-soft.com/3d-products/simlab-composer-freelicensee.php#lite

Hello,

I should have some time to make a tutorial in the next few days.

Hi Pilou,

if your object would be the same, then it is possible! :-)

@Dimitri

i attach for you your object and try to boolean union all three objects at once.
After that run the fillet command on the solid.

Hope that helps.

Regards
Stefan

@Stefan
the same than 3 cylinders ?

So what is your trick for your 3 crosses ?
(who works fine also for me :)

OK I find it ! :)
Union A & B
Then Union C
And not Union A, B, C
???

Hi Pilou,

i don't use any tricks. :-) I union all 3 at once. Maybe Michael can explain to us why it doesn't work with 2.

Best regards
Stefan

Yes that is the big question! :)

Hi Stefan,

> Maybe Michael can explain to us why it doesn't work with 2.

It seems to work fine for me over here doing just 2 - Pilou is there a particular order that doesn't work for you?

- Michael

Hi Michael,

interesting. I downloaded Pilou's file and added in there one from me, slightly larger, and as you can
see when i applied the fillet command first on Pilou's object and then on mine, it did not work as expected.



Best regards
Stefan

Hi Stefan, sorry I misunderstood I was thinking that it was booleans failing with the 2 vs 3 thing.

Doing the fillet on the 2 cylinder case is indeed a much more difficult fillet because it's a "disappearing fillet" type arrangement where the fillet shrinks down and down to a single point. The fillet engine that MoI uses tends to have problems with that type of fillet. In the "3 cylinder" case there aren't any fillets that have to behave like that.

For the "2 cylinder" one, it's possible to finish it by some manual work if just one of the fillets can be created. You can mirror the one fillet over and then use trimming to cut the cylinder pieces with the fillet edges. That's how I finished the attached version here.



- Michael

Hi Michael,

thanks for the information, much appreciated! I learned something new, on how to tackle this fillet issue! :-)

Best regards
Stefan

About UV
Seems filleted surfaces are not in continuation!
Does this normal?
Subdivision ?

Hi Pilou, circular arc fillets do have continuity with adjacent surfaces, but it's a Tangent/G1 level of continuity. It is normal for tangent continuity to show breaks in reflections. If you want smooth reflection lines, that needs Curvature/G2 continuity and it's not possible to get that with things constructed out of circular arcs like fillets are by default. You could try the fillet option for making a G2 blend type surface for the fillets rather than the regular circular arc fillets.

- Michael