Ring modelling issues

[simon_falze]

Hi rhino community!

This is my first time posting on the forum and i come to you guys with a challenging (at least for me) ring modelling problem.
I basically need to recreate this ring, as in the photo

but i can’t find a way to properly model the highlighted part (in red).

I think i tried all the methods that i know: flow along curve, flow along surface and tried to apply UV curves but nothing, the prongs and the housing of the stones keep morphing in an oval shape (like in the photo)

I really don’t know where to look anymore because i think i’ve tried 'em all and it’s becoming an excrutiating project to put toghether. I’ll put for you the 3dm (GP Ring 1.3dm (17.6 MB)
) so you can mess around with it and maybe help me out on this one.

Thanks!

[foreigner]

I think you need more practice to use Rhino for jewellery modelling and design… Rhino is powerful to use for anything.
So try to follow this YouTube channel.

PJ Chen Design

[simon_falze]

Thanks for the reply foreigner

I already know PJchen’s channel but still didn’t find a tutorial or video addressing my problem. I’m one year into rhino and i know that i’m a beginner but i got to know pretty well the interface and the commands. I think that what i’m really missing is in the workflow

[Eliel]

@simon_falze have a nice day,
try using the flow command
but first activate the history record
and move the control points of the target curve.
example:
Ring.3dm (13.7 MB)

[jeremy5 (Jeremy)]

Hi @simon_falze,

To avoid the gems, posts etc going oval when you flow them, you need to keep them all as separate elements (ie not joined or grouped) and use the rigid=yes option. I’m afraid that means you will have to step back a bit from where you have got to before you can go forward.

Regards
Jeremy

[simon_falze]

Hi Eliel, thanks for the reply

that’s a great tip but i think you didn’t quite understand the problem because, as you can see from the photo, the stones and the prongs still become oval.

[simon_falze]

Hi Jeremy,

I think i already tried that but ended up with the same result. I don’t have that file in which i used that method anymore because i thrashed it but, if i remember correctly i didn’t achieved the result i wanted.

[jeremy5 (Jeremy)]

Hi @simon_falze,

Here is an example of flow along curve with rigid=yes for just the stones:

You had the stones grouped which will have prevented this working (the entire group would have been kept rigid, not the individual stones)

Regards
Jeremy

[jeremy5 (Jeremy)]

To follow that up: you need to remodel the mounts as a set of individual tubes, along with a set of individual posts, and separate rails. Flow them before joining. I would Boolean difference out the arches after flowing the rails, because if you cut them out first they will distort in the flow.

Regards
Jeremy

[simon_falze]

Thanks Jeremy!

Definetly gonna try this out. Didn’t really thought of grouping to be so important in the workflow, that’s what i was missing. I’m going to re-model this later and i’ll let you know if it works.

Thanks again Jeremy, really helpful

[Eliel]

Yes, you are right I did not read the last point at which you make a point in the distortion.
but as he mentions @jeremy5 ,you can make an individual flow of the pieces so that the distortion is lost then merges the whole set