Showing me the way

Hello, been in and out of grasshopper everynow and then but never really found a project that can make it work for me. Im a jewellery designer, most of my pieces are one off client designs but now im getting alot more signet rings which i model the same way every time and i feel now this is the perfect opertunity to work with grasshopper and actually learn it. Ive looked at some signet ring definitions ive found online but i dont really like the finshed model they produce. I understand what I need to do but have no idea how to recreate it in grasshopper from the way i model in rhino. In the picture you can see my process of modelling using networksurface as my main command. I would be great if someone would be able to talk me through it or point me to some online tutors.

SIGNET_RING_PROCESS.3dm (3.2 MB)

SIGNET_RING.gh (5.4 KB)

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In before anyone gives a full solution.

This is a good opportunity for you to learn how to “Grasshopper”, and you have set yourself up well, knowing and going through up the individual steps in Rhino first.

I would try to solve the problem in the same way you have set it up in Rhino. I will look at the first image and get back to you with components / methods you will be needing.

Yeah i hope that i can figure it out, but may need a litle hand holding! Theres some things i can get my head around. I understand that i can create the wire frame for network surface signet ring with points within in Grasshopper and draw polylines between them, but i struggle with the parts inbetween, as in listing the points figureing out how to move the points independetly and so on!

I think the first hurdle for me is how to draw the points correcty for the shank creation based on the ring size. The top profile will be a curve that i draw seperatley in rhino and set so that the ring curves can all connect correctly.

Thanks for all the help in advance.

How exactly is the profile of the shank in the bottom quarter determined? :sweat_smile:

I mean specifically this profile here:

I’ve set it up parametrically, but it feels a bit “by experience” -y

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You should probably get a copy of Algorithms Aided Design by Arturo Tedeschi

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Its done by eye,as long as the shank is split, i then arc blend it together duplicate the split ends and sweep two.

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Looks good, just ordered!

I found this useful algorithm Help with Network Surface - #2 by velopl and added an extra script to it. (green group is the add-on)


Signet.gh (34.5 KB)

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so after 2 hours nearly ive go to this point! just by seeing what works :rofl:

SIGNET_RING.gh (5.4 KB)

Quite proud of myself :rofl:

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For jewelry design there is a plugin called Peacock
https://www.food4rhino.com/en/app/peacock

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Did you check your messages?

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Grasshopper offers only a subset of Rhino. No matter how advanced you are with Grasshopper, it doesn’t let you do the same things. It often ends in a trade-off. It will not make Rhino a parametric modelling software, instead it allows you to visual code with a reduced geometrical library. So its not a skill issue alone. And don’t expect any GH teacher to be experienced in surface modelling.

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True. But let’s not discourage learning Grasshopper for the things that it can do.

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Anything Grasshopper cannot do regarding geometry, ask Claude to write a python or C# module that will work with Rhino common commands. It delivers consistently.

It can do whatever you need it to.

Looks like you are on your way Luke, have fun!

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I see the point, but its not meant to be discouraging if you know about the limitations. I personally just believe its a problem if you cannot reproduce certain modeling operations because the API doesn’t offer you the right modelling command. Sure you can code it up, but I’m pretty sure that most user lack the knowledge to do so. I’m pretty sure AI fails hard on reproducing these algorithms, because they are closed-source and no training data is present. If AI can solve it for you, you know it wasn’t a hard problem. Its a great learning tool overall.

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Claude has a very good knowledge of Rhino 3D.

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