any workflow for accomplishing this? the attached model does not seem accomplish such a transformation using UnrollSrf, Smash or Squish. How to or not possible in Rhino?
unfold to 2d.3dm (399.4 KB)
Thanks for your notes. The material is paper + with cutting and scoring the 2d result, a curved fold becomes an option (possibly)
No, you can’t “unroll” double-curved shapes. They need to be rationalized into strips that are developable. The flat pattern for such a shape could be virtually anything, depends on the material, which is not simulated here. Where I’ve had to deal with this problem there are simply “rules of thumb” used to make a good-enough approximation.
You can try using the ExtractRenderMesh before running the Squish, for your reference.
To add to what Jim and Jessesn have mentioned, I think you would want to separate the dome from the tapered cylinder, depending on the material.
This is a very simple example, and the render mesh works as expected. However, it might be necessary to cut a more complex with greater variation in curvature into multiple sections or strips and mesh those independently where difference in the stretch of the material might cause issues.
Ideally, as Jim mentioned, you would first build your model in developable strips.
Hi Jessen. I’ve never used ExtractRenderMesh before running Squish and it works fine. Does ERM make for different outcomes? I’ve used Squish for years making patterns for everything from boat canopies and covers to pop-top campers to tents and my real job of designing apparel and backpacks. I’ve created literally hundreds of patterns that worked perfectly first time just using Squish alone. Does the render mesh flatten differently? I may have to experiment some. Cheers.
Regarding the unfold results, there won’t be significant differences with the same paramter settings. If you encounter any issues during this process, pls feel free to contact me directly via DM. Thank you.