Creating curved sketch along 3D scanned model for soft goods workflow

Rhino
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1

Hello, I have a 3d scanned model, which I exported from VX model into a STEP format into Rhino.

I need to be able to trace this form in order to create patterns, but it seems I’m unable to do that.

My workflow is this: Scan > VX model clean up + STEP export > Rhino…??? > exact flat > Gerber pattern.
In SolidWorks, it’s easy to just 3D sketch along the surface, but we want to switch to Rhino workflow.

I’ve uploaded what I want to do, with the red line. and the second image is the nurbs object highlighted.

What I tried:

  • Poly line on mesh works great, but it’s straight lines only, no way to hit clean curves.
  • Flow along srf doesn’t work.
  • Project doesn’t work.

Would appreciate any help!

(P.S due to I.P, I CAN NOT send any cad files or models)

Screenshot 2025-05-15 112156
Screenshot 2025-05-15 112156847×758 140 KB

Screenshot 2025-05-15 112212
Screenshot 2025-05-15 1122121044×770 127 KB

2

Did you try the command SnapToMeshObject ? fyi,

3

Hello, this is a Nurbs object (STEP vs OBJ) that has been imported into rhino. I’ll try it again with snap to mesh, and I’ll attempt it with pull and will update.

We’re really trying to move away from Solidworks.

1 Like
5

Okay, it seems it work! Thank you.

I guess the next issue is can I take that linework, then hide the converted mesh body, and use the lines against the original NURB body.

1 Like
6

I think there is a command called CrvOnSrf. Might be close to what you’re describing Solidworks does.—-Mark

7

Is it a mesh or a nurbs object?—-Mark

8

Nurbs. But we migt start using mesh (obj) as it seems to work better with exactflat.

Jessesn’s information helped solve the problem! I’m now able to make curves along the surface body.