2d curves and surface apply

[JimCarruthers]

The V4 WIP has some nifty tools to help with this kind of thing...otherwise, it might be best unless the surface is really curvy to just move the curve close to the surface and use Pull or Project.

[7Stones]

Perhaps I don't understand what you are trying to do... but it seems to me that one way to accomplish what you are trying to do is to intersect your curved surface with a cylinder where you want the circle to be. Then apply the Curve>From Objects>Intersection command to both surfaces to create the circle from the intersection.

[andrewjohn81]

wouldn't projecting the curve on the surface be the easiest solution there?

Because of the lacking history in Rhino, I don't know how well editing curves on surface works though. Hopefully they will address that further in the future.

[arkileo]

I would like to thank you all for your useful help.

To be precise, i was tring to project some 2d pentagons on a very curvy surface (a ring) and wanted to get them projected properly all around the surface.
The fact is that if you are designing a decoration on a ring it may be even lightly distorted, but if you have to cut it to place diamonds on it you must be very accurate and obtain always the same intersection shape.
So placing the curve near and pull them is a way, but they must always be oriented normal to the surface and you may have to repeat this several times.
Also the boolean subt. may be but all solids must be oriented properly again.
I have heard something about those uv curves extraction and apply, but i didn't understand how they work, and couldn't get control over them.
That's all. Thanx again.

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